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Black Hills Corp. Announces Leadership Changes and New Organizational Structure (08/31/2010) Back to Table of Contents

RAPID CITY, SD - Aug. 31, 2010 - Black Hills Corp. (NYSE: BKH) today announced several leadership and organization structure changes that are effective immediately. Tom Ohlmacher, president and chief operating officer of the non-regulated energy business, has announced his intent to retire from the company in March 2011. With this in mind, Linn Evans, president and chief operating officer for the utility businesses, now has an expanded role that includes power generation and coal mining operations and will continue reporting to David Emery, chairman, president and chief executive officer.

"With Tom's pending retirement after 36 years of dedicated service to our company, and with the majority of our significant integration projects completed, now is the time to adjust our organization structure so that we further optimize the way we do business," Emery said. "Our focus must now shift from 'unification' to 'continuous improvement,' leveraging the newly integrated capabilities of our organization and the skills and expertise of our employees so that we continually deliver the results our shareholders and customers expect."

Evans has established a new leadership structure for the business units now reporting to him. The new structure will allow the company to realize additional synergies between its gas and electric utilities as well as between the utility and non-regulated energy businesses. The restructured leadership team includes:

. Stuart Wevik, previously vice president of electric utilities, is now vice president, utility operations and is responsible for all gas and electric utility operations.

. Ivan Vancas, previously vice president, operations for Black Hills Energy - Kansas and Colorado Gas, is now vice president, utility services and is responsible for serving all of BHC's utilities through generation dispatch and power marketing, gas supply services, transmission services, engineering services, meter shop operations and customer service.

. Steve Pella, previously vice president, natural gas utilities, is now vice president strategic initiatives and is responsible for safety, environmental services, natural gas marketing services and supply chain.

. Mark Lux remains vice president and general manager of Power Delivery and is responsible for power generation and construction and coal mining operations.

. Brian Iverson, vice president of electric regulatory services, assumes interim responsibility for resource planning and renewable energy integration.

. Kyle White remains vice president of regulatory and government affairs.

Also as a part of the organization changes, Tori Campbell, vice president and general manager of Enserco, the company's energy marketing business, will begin reporting to Emery. John Vering, in his interim assignment as president and general manager of Black Hills Exploration & Production, will continue to report to Emery as he completes the strategic review of that business.

"I appreciate Tom's contributions and the lasting legacy he has built at our company. In addition, I congratulate Linn Evans, Stuart Wevik, Ivan Vancas and Steve Pella on their new roles within Black Hills Corp. and look forward to their continued contributions to our success," Emery said.

Black Hillls Energy Receives Approval From The Nebraska Public Service Commission to Implement New Natural Gas Rates (08/18/2010) Back to Table of Contents

LINCOLN, Neb., Aug. 18, 2010 - Black Hills Energy, a subsidiary of Black Hills Corp. (NYSE:BKH), today announced that the Nebraska Public Service Commission issued a decision approving an annual revenue increase of approximately $8.7 million, based on a return on equity of 10.1 percent with a capital structure of 52 percent equity effective for natural gas service on and after Sept. 1, 2010. Black Hills Energy's original rate request was filed on Dec. 1, 2009.

"Since our last rate increase in 2007, we have invested nearly $30 million in Nebraska to replace obsolete pipes and other equipment, make system upgrades and implement new technology so that our gas distribution systems remain safe, reliable and efficient," said Dan Mechtenberg, Black Hills Energy vice president of Nebraska gas operations. "This rate increase allows for recovery of operating costs and a return on infrastructure investments which ensures our customers continue to receive the dependable service they expect from us."

Under the new rates approved by the NPSC, a typical Black Hills Energy residential customer in Nebraska will see an approximate increase of $3.90 per month, and a typical commercial customer will see an approximate increase of $1.88 per month. The increase experienced by large commercial and industrial customers in Nebraska will vary depending on rate class and the amount and nature of their natural gas use. Black Hills Energy implemented an interim rate increase of $12.1 million, or about 6.5 percent on March 1, 2010. Since the new rates approved by the NPSC are lower than the interim rates, customers will receive refunds for the difference between the two rates after the refund plan specified in the order has been filed and approved by the NPSC.

The new rates approved by the NPSC also include changes to the monthly customer charge (a flat fee for natural gas service that stays the same each month) in addition to the base rate (a fixed per-therm rate for the natural gas consumed by customers that causes the monthly customer bill to fluctuate depending on usage). The NPSC decision sets the residential customer charge at $13.50 per month and the commercial customer charge at $18.50 per month for Black Hills Energy customers in Nebraska. The new rates approved by the NPSC affect only 35 percent of a typical Nebraska customer's bill. The remaining 65 percent of the monthly bill accounts for the cost of the natural gas commodity and is a pass-through cost that Black Hills Energy pays to its natural gas suppliers. The utility does not earn a profit on the natural gas commodity and therefore it was not part of this rate case.

MDU Resources Declares Quarterly Dividends on Common and Preferred Stock (08/12/2010) Back to Table of Contents

BISMARCK, N.D. - August 12, 2010 - The MDU Resources Group (NYSE: MDU) board of directors today declared quarterly dividends on the company's common and preferred stock.

The dividend for common stock is 15.75 cents per share, unchanged from the previous quarter. Dividends for preferred stock are:

$1.12-1/2 per share on 4.50 percent Series Preferred
$1.17-1/2 per share on 4.70 percent Series Preferred
$1.27-1/2 per share on 5.10 percent Series Preferred
The dividends are payable October 1, 2010 to stockholders of record September 9, 2010.

Black Hills Corp. Reports Second Quarter Results And Reaffirms 2010 Earnings Guidance Substantial Progress On Strategic Initiatives (08/05/2010) Back to Table of Contents

RAPID CITY, SD – Aug. 5, 2010 – Black Hills Corp. (NYSE: BKH) today announced second quarter 2010 financial results. Adjusted income from continuing operations and adjusted net income was $7.5 million or $0.19 per share, compared to $6.7 million or $0.18 per share for the same period in 2009 (this is a non-GAAP measure, see the accompanying schedule for the GAAP to non-GAAP adjustment reconciliation). On a GAAP basis, the company reported a loss from continuing operations and a net loss of $8.7 million or $0.22 per share for the second quarter of 2010, compared to income from continuing operations and net income of $24.6 million or $0.64 per share for the same period in 2009.

Click the link to read the complete news release.
News Release on Black Hills Corp. Second Quarter Results

Click the link to view a presentation regarding the Second Quarter Results.
Presentation on Black Hills Corp. Second Quarter Results

Black Hills Energy Receives Approval From The Colorado Public Utilities Commission To Implement New Electric Service Rates (08/05/2010) Back to Table of Contents

PUEBLO, Colo., August 5, 2010 - Black Hills Corp. (NYSE:BKH) subsidiary Black Hills Energy - Colorado Electric today announced that the Colorado Public Utilities Commission issued a decision approving a settlement agreement for the utility's southern Colorado customers representing approximately $17.9 million in additional annual revenues, based on a return on equity of 10.5 percent with a capital structure of 52 percent equity to be effective on and after August 6, 2010.

"Black Hills Energy is committed to providing safe, reliable electric service to our customers," said Christopher Burke, vice president, operations for Black Hills Energy - Colorado Electric. "This rate request settlement will allow appropriate recovery of the rising costs associated with our electricity supply contracts and infrastructure investments to ensure our customers the levels of service they have come to expect from us."

Black Hills Energy's original rate request was filed on Jan.5, 2010. The request was necessary to cover the utility's increased expenses, which are primarily associated with electricity supply contracts and investments in equipment and electricity distribution facilities necessary to maintain and strengthen the reliability of Black Hills' electric delivery system in Colorado. The last base rate increase for Black Hills Energy customers in Colorado became effective nearly six years ago in September 2004.

Since being filed, the rate request has undergone extensive review by the Colorado Public Utilities Commission, Commission Staff and the Colorado Office of Consumer Counsel. Negotiations between the nine intervening parties and Black Hills Energy resulted in the settlement.

Under the new rates a typical Black Hills Energy residential customer in southern Colorado using 600 kilowatt hours of power each month will see an increase of $7.90 per month, or about $0.26 per day, and typical small-business customers using 2,300 kilowatt hours per month will experience an increase of approximately $26.38 per month. The increase experienced by Black Hills Energy's large commercial and industrial customers in Colorado will vary depending on rate class and the amount and nature of their electricity use. Black Hills Energy currently serves approximately 93,300 residential, commercial and industrial electric customers in southern Colorado.

Otter Tail Corporation Announces Second Quarter 2010 Results (08/02/2010) Back to Table of Contents

FERGUS FALLS, Minn., Aug. 2, 2010 (GLOBE NEWSWIRE) -- Otter Tail Corporation (Nasdaq:OTTR) today announced financial results for the quarter ended June 30, 2010.

Highlights

Consolidated revenues rose approximately 9.5% compared with the second quarter of 2009.
Second quarter 2010 results include a noncash asset impairment charge of $19.7 million ($15.6 million net-of-tax), or $0.44 per share, at ShoreMaster, which primarily caused the year-over-year change from $0.07 per share net income to $0.40 per share net loss.
The corporation is revising its 2010 diluted earnings per share guidance (see 2010 Expectations).
Board of Directors declares quarterly common and preferred dividends.

Click to view complete report: Otter Tail Second Quarter 2010 Financial Results

MDU Resources Reports Second Quarter Earnings, Reaffirms 2010 Earnings Guidance (08/03/2010) Back to Table of Contents

Consolidated earnings of $48.8 million, or 26 cents per share.
Record seasonal natural gas storage levels at Pipeline.
Increased natural gas and oil production by 6% compared to first quarter.
Solid balance sheet with equity of 62% of total capital.
Reaffirming 2010 guidance of $1.10 to $1.35 per common share.

Click to view complete report: Black Hills Second Quarter 2010 Financial Results

Black Hills Corp. Announces Quarterly Dividend and Schedules Second Quarter 2010 Financial Results, Conference Call and Webcast (07/29/2010) Back to Table of Contents

RAPID CITY, SD - July 29, 2010 - At a meeting held July 28, 2010, the board of directors of Black Hills Corp. (NYSE: BKH) declared a quarterly dividend on the common stock. Common shareholders of record at the close of business on Aug. 18, 2010, will receive $0.36 cents per share, payable on Sept. 1, 2010.

The company will issue a news release announcing 2010 second quarter results after market close on Thursday, Aug. 5, 2010, and host a live conference call and webcast at 11 a.m. EDT on Friday, Aug. 6, 2010, to discuss the company's financial and operating performance.

Those interested in listening to the live broadcast from within the United States can call 866-700-7477. International callers can call 617-213-8840. All callers need to enter the pass code 23235101 when prompted. To access the live webcast and download a copy of the investor presentation, go to the Black Hills website at www.blackhillscorp.com and click "Webcast" in the "Investor Relations" section. The presentation will be posted on the website before the webcast. Listeners should allow at least five minutes for registering and accessing the presentation.

For those unable to listen to the live broadcast, a replay will be available on BHC's website or by telephone through Aug. 13, 2010, at 888-286-8010 in the United States and at 617-801-6888 for international callers. The replay pass code is 97915743.

NorthWestern Corporation News Release (07/29/2010) Back to Table of Contents

Click link below to view Northwestern Corporation's second quarter press release.

Second Quarter Press Release

Black Hills Receives Air Permit For Colorado Power Plant Projects (07/22/2010) Back to Table of Contents

Ground-breaking occurs at Pueblo Airport Generation Station

PUEBLO, Colo., July 22, 2010 - Today, Black Hills Energy - Colorado Electric and Black Hills Colorado IPP, subsidiaries of Black Hills Corp., were issued an air permit by the State of Colorado Department of Public Health and Environment and immediately began construction on two generation projects that will serve more than 93,300 Black Hills Energy - Colorado Electric utility customers in southern Colorado beginning Jan. 1, 2012.

"Receiving our air permit is an important milestone for these Black Hills generation projects, and now we have begun construction at the Pueblo Airport site," said David R. Emery, chairman, president and chief executive officer of Black Hills Corp. "We are on track to have both plants ready for commercial operation by the end of 2011 as planned. Most of the major equipment for the projects has been purchased, contracts have been awarded for the construction of water and gas lines, a water supply agreement has been executed, the annexation agreement has been approved by the City of Pueblo and the process to select the remaining contractors is well underway."

In June 2009, Black Hills filed an initial application for an air permit with the State of Colorado Department of Public Health to construct and operate its new utility generating plant, and in September 2009, Black Hills submitted a revised application to include the Black Hills Colorado IPP plant. Both generation projects will be located on a site near the Pueblo Airport. As many as 400 local jobs will be created during the construction phase, and once completed, the Black Hills facilities will create about 15-20 permanent highly technical jobs in southern Colorado.

Black Hills Power Sells 23 Percent of WYGEN III to City of Gillette (07/14/2010) Back to Table of Contents

GILLETTE, Wyo., July 14, 2010 - Black Hills Corp. (NYSE: BKH) today announced that its electric utility subsidiary, Black Hills Power, sold a 23 percent ownership interest in the Wygen III power generation facility to the City of Gillette for $62 million. Wygen III is a 110-MW coal-fired power plant recently constructed near Gillette, Wyo. The transaction entitles the City of Gillette to 23 percent of the plant's output - or approximately 25.3 MW - for the life of the plant. Wygen III began commercial operations on April 1, 2010.

Since the 1960s, Black Hills Power has had a long-term arrangement to provide power to the City of Gillette, including most recently under a 23-MW purchase power agreement. The City's purchase of the 23 percent ownership interest in Wygen III will terminate the current purchase power agreement with Black Hills Power. In addition to the $62 million purchase price, under the terms of the agreement, the City of Gillette will pay Black Hills Power for ongoing administrative services and share in the costs of operating the plant for the life of facility. The City will purchase coal for Wygen III under a separate coal supply agreement with Wyodak Resources Development Corp., another subsidiary of Black Hills Corporation.

"We are pleased to complete this transaction with the City of Gillette and look forward to being co-owners of the Wygen III facility," said David R. Emery, chairman, president and chief executive officer of Black Hills Corp. "We have a long-standing relationship and appreciate the opportunity to continue to work together to serve customers."

The transaction provides advantages to the City of Gillette as well, said Mike Muirhead, City Administrator, City of Gillette, Wyo. "Our customers will benefit from a price-stable, reliable fuel source for years to come," said Muirhead.

The transaction makes the City a third co-owner of the Wygen III plant. Montana-Dakota Utilities purchased a 25 percent ownership interest in the plant in April 2009. Black Hills Power retains controlling interest in and operatorship of the plant with 52 percent ownership.

Black Hills Corp. Announces Pricing of $200 Million of Senior Notes (07/13/2010) Back to Table of Contents

RAPID CITY, SD - July 13, 2010 - Black Hills Corp. (NYSE: BKH) today announced the pricing of a public debt offering of $200 million aggregate principal amount of senior unsecured notes due July 15, 2020. The notes were priced at par and will carry an interest rate of 5.875 percent. Black Hills expects the issuance and delivery to occur on July 16, 2010, subject to customary closing conditions, and plans to use the proceeds to reduce borrowings on its corporate revolving credit facility.

"We are pleased to complete another long-term financing at favorable terms. It positions us well as we continue to make significant capital investments to construct our two Colorado gas-fired generation projects that will provide reliable energy for our utility customers and create additional earnings growth for Black Hills shareholders," said Tony Cleberg, executive vice president and chief financial officer of Black Hills Corp.

The senior notes were offered by Black Hills Corp. pursuant to a shelf registration statement originally filed on May 6, 2008, with the U.S Securities and Exchange Commission and amended on Oct. 22, 2009. Credit Suisse, RBS and Scotia Capital served as joint book-running managers for the offering and Mitsubishi UFJ Securities, US Bancorp, and Wells Fargo Securities served as senior co-managers. BofA Merrill Lynch, Credit Agricole CIB, Fifth Third Securities, Inc. and Societe Generale served as co-managers.

Northwestern Granted INterim Rate Relief (07/09/2010) Back to Table of Contents

SIOUX FALLS, S.D. – July 9, 2010 – NorthWestern Corporation d/b/a NorthWestern Energy (NYSE: NWE) announced today that the Montana Public Service Commission (“MPSC”) granted an interim rate increase, consistent with NorthWestern’s October 16, 2009 Application for Authority to Establish Increased Natural Gas and Electric Delivery Service Rates and Implement Allocated Cost of Service and Rate Design Proposals (the “Application”), for electric delivery revenues of $12,395,640, on a uniform basis, and for gas delivery revenues of $1,361,517, on a uniform basis, effective July 8, 2010 (the “Interim Order”). The MPSC’s order indicated that if the final order in this Application has a revenue requirement which is lower than the revenue requirement contained in the Interim Order, the difference will be rebated to customers with interest at 10.75 percent, NorthWestern’s last approved return on equity. In addition, interim approval of any matters in this proceeding should not be viewed as final endorsement by the MPSC of any issues, calculations, or methodologies approved in the Interim Order.

NorthWestern expects to reserve the revenues collected as a result of the Interim Order for accounting purposes in accordance with Generally Accepted Accounting Principles, pending the issuance of a final order on this matter. Neither the Interim Order, nor any other Application decision, will have any consequence on the 2010 earnings guidance previously provided by NorthWestern because that guidance specifically excluded any effect of the pending Application. NorthWestern expects a final decision on the Application during the fourth quarter of 2010.

Northwestern's Second Quarter 2010 Financial Results (07/08/2010) Back to Table of Contents

SECOND QUARTER 2010 FINANCIAL RESULTS CONFERENCE CALL

A conference call to discuss financial results for the second quarter 2010 will be held:

Thursday, July 29, 2010
11:00 a.m. (Eastern time)
10:00 a.m. (Central time)
8:00 a.m. (Pacific time)
Dial 800-230-1074
NorthWestern Corporation
Second Quarter 2010 Financial Results
Host: Dan Rausch

If you are unable to participate in the conference call as scheduled above, a replay will be available beginning at 12:00 p.m. CT on July 29 through August 29, 2010. To access the replay, dial 800 475-6701, access code 163720.

The call also will be simultaneously broadcast on our Web site at www.northwesternenergy.com, and a replay will be available for 30 days following the conference call.

Black Hills Power Receives Approval From The South Dakota Public Utilities Commission To Implement New Electric Service Rates (07/08/2010) Back to Table of Contents

RAPID CITY, SD, JULY 8, 2010 - Black Hills Corp. (NYSE:BKH) subsidiary Black Hills Power today announced that the South Dakota Public Utilities Commission issued a bench order approving the settlement stipulation agreement that was previously filed on May 14, 2010. The original rate request was filed on Sept. 30, 2009, to recover costs associated with the new generation facility, Wygen III, near Gillette, Wyo., and other generation, transmission and distribution investments and increased operating expenses. New rates will be implemented for electricity service on and after July 12, 2010, and will replace the interim rates effective since April 1, 2010.

"We're proud of our record of providing safe, reliable electric service at fair and stable prices for the benefit of our customers and the communities we serve," said Chuck Loomis, vice president of operations for Black Hills Power. "We are pleased that the commission recognized not only the value in the settlement proposal we set forth but also that Wygen III was necessary and the lowest cost option to provide the electricity our customers need. This new power plant, which was completed under budget and ahead of schedule, has been producing electricity for our customers since April 1, 2010, and will provide safe, reliable, stable-priced electricity for the next 50 years."

The new rates represent an approximate $22 million increase to base rates, a 12.7 percent revenue increase. Black Hills Power implemented an interim base rate increase of $24 million, or about 20 percent revenue increase on April 1. Since the new rates are lower than the interim rates, customers will receive refunds for the difference between the two rates for electricity used from April 1, 2010, to July 12, 2010. A typical South Dakota residential customer using an average of 600 kilowatt-hours of power each month will see a refund of about $10. Commercial and industrial customers' refund amounts will vary based on their electric service rates and electricity use.

PUC approves reduced Black Hills Power rate increase (07/07/2010) Back to Table of Contents

PIERRE, S.D. – The South Dakota Public Utilities Commission today approved a 12.7 percent increase in electric rates for retail customers of Black Hills Power. The increase represents about $17 million less in annual revenues than the company requested. The commission voted at the end of a three-day hearing held to consider a settlement agreement between commission staff and Black Hills Power.

As a result of the settlement, customer bills will reflect a 19.4 percent increase, which includes the permanent rate increase of 12.7 percent plus a temporary 6.7 percent increase related to the energy cost adjustment. Black Hills Power is permitted by law to implement an annual energy cost adjustment, which it did on March 1, 2010, to recover the cost of fuel and purchased power. By March 1, 2011, the energy cost adjustment is expected to decrease, reflecting the permanent rate increase of 12.7 percent. The company asked for a permanent increase of 26.6 percent.

"Consumers told us that a request for a 26.6 percent increase demanded substantial scrutiny," said PUC Chairman Dusty Johnson. "They were right. After nine months of digging, analyzing and negotiating, we've approved this settlement, which excludes $17 million in annual costs ratepayers shouldn't have to pay for," he stated.

Black Hills Power requested a 9.27 percent rate of return on rate base, which the settlement reduced to 8.26 percent. Additionally, 100 percent of economic development costs, 98 percent of advertising costs and 100 percent of financial-based incentive compensation were excluded from rates. The incentive compensation adjustments alone had an impact of more than $800,000 a year.

Two key components of the settlement will combine to return at least $12.75 million to ratepayers over the next three years. First, because of concerns about the timing of the construction of the Wygen III power plant, Black Hills Power is required under the settlement to flow back to consumers almost $7 million during the next three years until Wygen III is expected to be needed to serve retail loads alone. Second, the first 65 cents of every dollar Black Hills Power earns by selling power into the wholesale market will flow back to ratepayers. Even if Black Hills Power receives no income from such sales, ratepayers will still receive a minimum credit of $2 million every year this rate is in effect. See sidebar for a list of additional items that were reduced or eliminated from the rate increase.

"I am confident the PUC did its duty in this very complicated rate case," said PUC Vice Chairman Steve Kolbeck. "Staff conducted an extensive, exhaustive analysis to arrive at a comprehensive settlement where, I believe, the interests of the ratepayer are the centerpiece," he said.

PUC Commissioner Gary Hanson stated: "Surprisingly, even the evidence from the opponent's witness supported the company's decision to build the Wygen lll plant and actually corroborated the return on equity percentage agreed to by PUC staff and Black Hills Power. Without the additional capacity, Black Hills Power would not have the long-term ability to provide reliable and economical electric service," he said.

Black Hills Power filed an application with the PUC on Sept. 30, 2009, requesting to increase rates by approximately $32 million annually or 26.6 percent based on the company's test year ending June 30, 2009. PUC staff and Black Hills Power reached a settlement agreement on May 14, 2010.

A group of intervenors collectively known as the Residential Consumers Coalition participated in the hearing to oppose the settlement. A second group, the Black Hills Industrial Intervenors, reached a separate settlement with Black Hills Power that was approved by the commission on June 10, 2010.

Because Black Hills Power has had an interim rate increase in effect since April 1, 2010, that is higher than the rate approved by the commission, customers can expect to receive a modest refund. The bill credit will be made to customer billings.

A PUC staff team of one attorney and five analysts logged more than 2,600 hours reviewing documents, requesting additional information, conducting meetings and analyzing data. The staff team was assisted by two specialized consulting firms. The analysis included a review of Black Hills Power's integrated resource plan, submitted separately from the company's rate increase application. The plan described the company's course for meeting the future electricity demands of its customers and the resources it intends to use.

The Black Hills Power rate case generated considerable public attention. The PUC held four public input meetings at which the commissioners listened to ratepayer concerns and addressed questions about the PUC's authority and the rate case process. Additionally, more than 200 written and verbal comments regarding the case were submitted to the PUC office.

This is the second rate increase for Black Hills Power since 1995. The company's last increase of 7.8 percent occurred in 2007. The settlement agreement approved by the PUC prohibits the company from requesting another rate increase before April 2013. The commission amended the settlement to require Black Hills Power submit a report with its next rate increase application that describes the company's energy efficiency and demand-side management efforts and the results of those efforts.

Headquartered in Rapid City, S.D., Black Hills Power serves 64,100 electric customers in 20 Black Hills communities.

SIDEBAR:
Black Hills Power Rate Case Settlement Adjustments
The South Dakota Public Utilities Commission approved a settlement agreement to allow Black Hills Power to increase electric rates for retail customers by 12.7 percent. The company sought a 26.6 percent increase. The settlement included more than 50 adjustments to the company's original request. The adjustments represent about $17 million less in annual revenues than the company requested. Following is a partial list of the reductions. For ease of review, these figures have been converted to operating income amounts by major category.

Adjustment - Revenue Reduction
Rate of return (9.27% vs. 8.26%) - $6,113,000
Surplus energy adjustment - $2,500,000
Flow-through tax treatment of repair allowance - $1,418,000
Plant investment adjustments - $1,416,000
Workers compensation expense - $1,402,000
Incentive compensation - $ 809,000
Unfilled positions - $ 619,000
Wygen III depreciation expense - $ 433,000
Advertising expense - $ 266,000
Economic development expense - $ 53,000

For detailed information about the settlement agreement, read the memorandum from PUC Staff on the PUC Web site at http://puc.sd.gov/commission/dockets/electric/2009/el09-018/051410staff.pdf

Black Hills Corp to Ring Closing Bell at New York Stock Exchange - 30 Year Milestone as a NYSE Listed Company (07/01/2010) Back to Table of Contents

RAPID CITY, SD - July 1, 2010 - Black Hills Corp. (NYSE: BKH) today announced it will be celebrating 30 years as a listed company on the New York Stock Exchange by ringing the closing bell at 4 p.m. EDT Friday, July 9, 2010. At the invitation of the NYSE, Black Hills leaders will participate in the closing bell ceremony.

"We look forward to celebrating 30 years of our BKH listing at the New York Stock Exchange and thank them for the opportunity to mark this milestone. Black Hills has a 127 year history of serving customers and building shareholder value. In February, our board of directors approved a quarterly dividend increase for the 40th consecutive year," said David R. Emery, chairman, president and CEO of Black Hills Corp. "We have a long-standing tradition of achieving our strategic objectives and remain well positioned for future earnings growth."

NorthWestern to Host Second Quarter 2010 Financial Results Conference Call (06/28/2010) Back to Table of Contents

Sioux Falls, S.D. – June 30, 2010 – NorthWestern Corporation, d/b/a NorthWestern Energy (NYSE: NWE), today announced that it will host an investor conference call on Thursday, July 29, 2010, at 11:00 a.m. Eastern Time (10:00 a.m. Central Time) to review its financial results for the quarter ended June 30, 2010. The Company also plans to issue a news release detailing its second quarter 2010 financial results the morning of July 29, 2010, before the market opens.

The conference call will be webcast live on the Internet at www.northwesternenergy.com under the “Investor Information” heading. To listen, please go to the site at least 10 minutes in advance of the call to register. An archived webcast will be available shortly after the call.

A telephonic replay of the call will be available beginning at noon Eastern Time on July 29, 2010, through August 29, 2010, at 800-475-6701, access code 163720.

MDU Resources Announces Webcast of Analyst Conference Call (06/28/2010) Back to Table of Contents

BISMARCK, N.D. - June 28, 2010 - MDU Resources Group, Inc. (NYSE:MDU) will webcast its second quarter 2010 earnings conference call August 3 following the release of its results.

The webcast will begin at 1 p.m. EDT and can be accessed at www.mdu.com. A webcast replay and audio replay will be available. The dial-in number for audio replay is (800) 642-1687, or (706) 645-9291 for international callers, conference ID 79585184.

U.S. EPA Awards Black Hills Energy 2010 Energy Starr Leadership In Housing Award In Iowa (06/21/2010) Back to Table of Contents

WEST DES MOINES, Iowa, June 21, 2010 - Black Hills Energy has received a 2010 ENERGY STARR Leadership in Housing Award from the U.S. Environmental Protection Agency. This award recognizes the contribution Black Hills Energy has made to energy-efficient construction by verifying and incenting the construction of 270 ENERGY STAR qualified homes last year throughout its Iowa service territory. According to ENERGY STAR, these homes will save Black Hills Energy customers approximately $84,000 on utility bills each year.

"Black Hills Energy is honored to receive the ENERGY STAR award from the U.S. Environmental Protection Agency for the second consecutive year," said Linn Evans, president and chief operating officer - utilities. "We are committed to helping customers be more energy efficient without sacrificing comfort in their homes and offices. By doing simple things like adjusting thermostats when away, customers can reduce energy waste that can lead to potential savings on their monthly bill."

To earn the ENERGY STAR qualification, a home must meet strict guidelines for energy efficiency set by the EPA. These homes are at least 15 percent more efficient than homes built to local code, and include additional energy-saving features that typically make them 20 percent to 30 percent more efficient than standard homes.

"EPA is privileged to work with a diverse group of utilities, state programs, and home builder associations who effectively support ENERGY STAR Qualified Homes," said Sam Rashkin, National Director of ENERGY STAR for Homes. "Thanks to the leadership of these sponsors, home buyers across the country have greater access to ENERGY STAR Qualified Homes that cost less to own while improving comfort, indoor air quality, durability, and our environment."

ENERGY STAR qualified homes offer homebuyers all the features they want in a new home, plus energy-saving features such as effective insulation systems, high performance windows, tight construction and ducts, properly-sized and installed efficient heating and cooling equipment, efficient products, and third-party verification of energy performance.

For more information about the energy efficiency programs available to Black Hills Energy's residential, commercial and industrial natural gas customers in Iowa, visit www.BHEhowto.com or call 888-567-0799. Black Hills Energy - Iowa* Black Hills Energy serves 149,700 natural gas customers in 130 Iowa communities, and is a proud recipient of the U.S. EPA 2010 ENERGY STARR Leadership in Housing Award. Black Hills Energy is part of Black Hills Corp. (NYSE: BKH).

PUC's Kolbeck named regional association president(06/16/2010) Back to Table of Contents

PIERRE, S.D. – Steve Kolbeck, vice chairman of the South Dakota Public Utilities Commission, was elected as president of the Mid-America Regulatory Conference (MARC) this month. Kolbeck takes the helm of the organization comprised of regulatory utility commissioners from 15 states. He will serve a one-year term.

MARC representatives hail from Arkansas, Kansas, Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, Oklahoma, South Dakota, Texas and Wisconsin. The group was formed in 1956 to facilitate discussions and networking among commissioners about regulatory and policy issues affecting their states, region and the nation.

As president, Kolbeck will oversee the 2011 MARC annual meeting scheduled for June 12-15, 2011, in Rapid City, S.D. An estimated 300 attendees are expected for the convention.

Kolbeck previously held leadership roles as secretary, treasurer and vice president of MARC.

MDU Resources Conducting Bakken Analyst Tour, Discussing Growth Opportunities in all Lines of Business Including the Bakken and Recently AcquiredAcreage in Emerging Niobrara (06/15/2010) Back to Table of Contents

BISMARCK, N.D. - June 15, 2010 - MDU Resources Group, Inc. (NYSE:MDU) is conducting its Annual Analyst Tour beginning today in the North Dakota Bakken area. Management will be conducting presentations that include providing resource information for its Bakken acreage.

Earlier this year the company acquired approximately 40,000 net acres in the North Dakota Bakken area, bringing the total acreage to more than 56,000 net acres. Drilling plans for the Mountrail County acreage totaling 16,000 net acres include the drilling of approximately 10 wells this year. The company projects gross estimated ultimate recoveries (EUR) of 250,000 to 450,000 barrels of oil equivalents per well. Utilizing the current rig under contract, it expects to drill 13 wells in 2011. Approximately 20 future operated Middle Bakken infill locations and 30 to 45 potential Three Forks locations have been identified within the Mountrail County acreage. Additionally, the company expects to participate in a number of non-operated wells.

"We are excited to be showcasing our North Dakota Bakken acreage," said Terry D. Hildestad, president and chief executive officer of MDU Resources. "Our first 30-day average production rates in our Mountrail County acreage have been very strong and are reflective of what other producers in the immediate area have experienced. Wells in this developed area of the Bakken tend to be lower-risk and results are increasingly repeatable. We've produced approximately 1.5 million net barrels of oil from this area in less than three years. Our current production is 3,000 net barrels per day which is up 75 percent from a year ago."

For the 40,000 net acres of Bakken region leaseholds held in Stark County, the Heart River project, plans include drilling three wells this year to evaluate the acreage. Future drilling plans for this acreage will be determined once results are analyzed for the three delineation wells and could include adding an additional drilling rig in the Bakken region next year. Lease terms extend up to five years including renewal options available to the company. A total of 60 drilling sites have been identified in this area based on 640 acre spacing. Gross EUR potential for the acreage is estimated at 250,000 to 500,000 barrels of oil equivalents per 640-acre location.

The company also earlier announced the acquisition of 80,000 net acres in the emerging Niobrara oil play in Laramie and Goshen Counties in southeastern Wyoming and north central Colorado. The company plans to begin drilling in the area in early 2011. Assuming 640-acre spacing, the company has 120 drilling sites available on this acreage. Lease terms are generally five years with most having five-year renewal options available to the company. Although this emerging play is still developing in terms of resource potential, early results announced by other producers in nearby acreage appear promising. Hildestad added, "Our recent leasehold acquisitions in the Bakken and Niobrara areas are expected to add substantial value to the corporation. These leasehold additions were acquired at very attractive prices and broaden our long-term growth potential with additional exposure to oil, which provides more balance to our portfolio.

We also plan to discuss growth opportunities we have in our utility, pipeline and construction businesses. We are in the right industries that will provide the incremental energy and infrastructure our country needs as it continues to recover and grow. Our strategy has delivered significant value to shareholders in the past, and we believe the future potential of our company to continue to grow and create wealth for shareholders is bright." Presentation slides associated with the company's Annual Analyst Tour can be accessed at www.mdu.com.

State's second-largest wind farm approved by the PUC(06/15/2010) Back to Table of Contents

PIERRE, S.D. – South Dakota's expanding wind energy industry took another leap forward today when the state Public Utilities Commission approved PrairieWinds SD 1, a 165-megawatt wind farm that will spread over parts of Jerauld, Aurora and Brule counties. Basin Electric Power Cooperative expects to begin construction of the facility in mid-July 2010 and be operational by March 2011.

The project will be constructed near Crow Lake and include up to 110 wind turbines and a 13-mile 230 kilovolt transmission line as well as other associated facilities. Data collected by the National Renewable Energy Laboratory and the South Dakota Wind Resource Assessment Network shows the Crow Lake area has an excellent wind resource.

When operational, PrairieWinds SD 1 will be the second-largest wind farm in South Dakota. The largest, Buffalo Ridge II at 210 MW, is under construction in Brookings and Deuel counties. Currently operating wind farms in the state are capable of collectively producing more than 412 MW of energy. Those facilities include the South Dakota Wind Energy Center in Hyde County, MinnDakota Wind Farm and Buffalo Ridge I in Brookings County, Tatanka Wind Farm in McPherson County, the Wessington Springs Wind Project in Jerauld County, the Titan Wind Project in Hand County and the Day County Wind Farm.

Basin Electric filed its application to construct the wind farm with the PUC on Dec. 30, 2009. Nearly 100 people attended a public input hearing hosted by the PUC in White Lake in March. A PUC staff team of one attorney and three analysts negotiated a settlement agreement with Basin Electric representatives regarding construction of the wind farm. The commission unanimously voted in favor of the agreement at its June 15, 2010, meeting. The agreement specified terms and conditions the company will follow before, during and after the construction of the wind farm. There were no intervenors in the case.

PUC Chairman Dusty Johnson noted the economic impact the wind farm will have on the rural area. "Easement payments to landowners, taxes paid to the counties and state, and the jobs created by the construction and operation of this wind farm will have a significant and welcome effect," Johnson stated.

Steve Kolbeck, commission vice chairman, lauded the PUC staff for its expediency in processing the siting case. State law directs the PUC to render a decision on wind energy facilities within six months of receiving the application. "I offer my thanks to staff for their efficiency and to Basin Electric for bringing their business to town," Kolbeck said.

Commissioner Gary Hanson reflected on the growth of the wind industry. "In a little more than one year's time, the PUC has permitted the state's two largest wind projects," he said, referring to Buffalo Ridge II and PrairieWinds SD 1. "When fully operational, these projects will push South Dakota's total wind energy production capacity to more than 787 MW. That's phenomenal growth considering just two years ago we had 186.8 MW of wind energy in South Dakota," Hanson said.

For more information on the PrairieWinds SD I docket, visit the PUC Web site at www.puc.sd.gov. Select Commission Actions, Commission Dockets, Electric Dockets, 2009 Electric Dockets, and EL09-028 to access the information or go directly to http://puc.sd.gov/Dockets/Electric/2009/el09-028.aspx.

Knife River Materials secures $30 million in MnDOT work(06/11/2010) Back to Table of Contents

BEMIDJI, Minn. - June 11, 2010 - Knife River Materials - Northern Minnesota Division will have a busy summer, working on three large Minnesota Department of Transportation projects. The division has secured contracts totaling more than $30 million to repave sections of Minnesota Trunk Highways 11, 71 and 2.

The $13 million Trunk Highway 11 work consists of approximately 18.4 miles of grading, milling, hot-mix asphalt overlay and culvert replacement. This project is located in Koochiching County near the Canadian border.

The second contract on Trunk Highway 71 for $10.7 million involves resurfacing 6.2 miles in Beltrami and Hubbard Counties. This repave project is more complex and includes bridge work and retaining walls, putting the completion date into 2011.

On Trunk Highway 2 in Polk County near Crookston, crews will mill out approximately 10.4 miles of the existing roadway and lay down hot-mix asphalt. The contract is for this work is $6.5 million.

All three jobs involve reclaiming the old asphalt to be reused in the new road surface.

"This work showcases our paving expertise and is a great boost for our division," said Knife River Materials President Doug Muyres. "That expertise and our history of quality work allow Knife River Materials to gain new work in an increasingly competitive market."

Knife River Materials - Northern Minnesota Division employs more than 240 people during peak construction season. The company provides a full range of construction services and materials for land developers, public agencies, institutions, contractors and homeowners.

Knife River Corporation mines aggregates and markets crushed stone, sand, gravel and related construction materials, including ready-mixed concrete, cement, asphalt, liquid asphalt and other value-added products. It also performs integrated construction services. Knife River operates in the central, southern and western United States and Alaska and Hawaii. Knife River is an indirect subsidiary of MDU Resources Group, Inc., a Fortune 500 natural resource enterprise traded on the New York Stock Exchange as "MDU." For more information about Knife River, visit the company's Web site at www.kniferiver.com.

Black Hills ENergy Requests 2.9 Percent Natural Gas Rate INcrease For Iowa Customers(06/08/2010) Back to Table of Contents

$17.2 million invested since 2008 to maintain safe, reliable system

WEST DES MOINES, Iowa, June 8, 2010 - Black Hills Energy, a subsidiary of Black Hills Corp. (NYSE:BKH), today announced it has filed a request for a $4.7 million or 2.9 percent increase in annual revenues with the Iowa Utilities Board to recover the cost of capital investments the company made in its Iowa natural gas distribution systems and other expenses incurred since December 2008.

As allowed by Iowa law, a 1.6 percent interim increase will go into effect June 18, 2010, while the rate case is being reviewed. Once in effect, the average monthly change for the general service class, which includes residential and commercial customers, will be $1.46. The average monthly bill of small volume customers will increase $51.27. If final rates approved by the IUB are lower than interim rates, customers will receive a refund with interest.

"Black Hills Energy is committed to providing our customers with safe, reliable natural gas service at a reasonable cost," said Tracy Peterson, Black Hills Energy vice president of Iowa gas operations. "Since 2008, we have invested approximately $17.2 million in Iowa to replace pipe and other equipment that has reached the end of its useful life. If our request is approved as filed, the average residential customer in Iowa will pay only 7 cents more per day to keep their house warm, cook meals, dry clothing and heat water."

The new rates as requested in the Black Hills Energy filing would affect only 35 percent of a typical Iowa customer's bill. The remaining 65 percent of the monthly bill accounts for the cost of the natural gas commodity and is simply a pass-through cost that Black Hills Energy pays to its natural gas suppliers. The utility does not earn a profit on the natural gas commodity and therefore it is not part of this rate case. As filed, if the proposed rates are approved, the average monthly bill would increase by approximately $2.26 for residential customers and $3.65 for commercial customers. The average monthly bill of small volume and large volume customers would increase $64.93, and $69.04, respectively. The actual change in a customer's total bill will vary based on how much natural gas is used and the price of natural gas. If approved, final rates would be effective in approximately 10 months or around April 9, 2011.

"Black Hills Energy natural gas service is a good value," said Peterson. "We proactively work to keep our operating costs low and our operating and maintenance costs have increased less than the rate of inflation since our last rate change request. It is important we make system upgrades and implement new technology so our natural gas distribution systems continue to deliver the energy our communities depend on."

Black Hills Energy is also proposing a system integrity rider that will allow the utility to recover a portion of the costs of capital to replace aging pipe to ensure safety and reliability, including depreciation on the investments made, thereby avoiding the need for a full rate case proceeding. As with similar riders used in other states, the company's proposal is designed to reduce the delay in recovering system maintenance investments, but the expenses would still be subject to review by state regulators.

"We are proud to reinvest in our Iowa communities, many of which are rural, and to provide customers with safe, reliable natural gas service. Black Hills Energy also offers many programs and services to help customers manage their natural gas bills and control energy use," continued Peterson.

Black Hills Energy's complete rate request will be available on the IUB website at iowa.gov/iub. More information on the filing can also be found at blackhillsenergy.com/ratecase/IA. Black Hills Energy encourages customers to visit bhehowto.com to learn more about energy saving tips, energy efficiency programs and incentives available to the company's Iowa residential and non-residential customers.

Black Hills Energy - Iowa*

Black Hills Energy serves 149,700 natural gas customers in 130 Iowa communities, and is a proud recipient of the U.S. EPA 2010 ENERGY STARR Leadership in Housing Award. Black Hills Energy is part of Black Hills Corp. (NYSE: BKH).

Black Hills Corporation Completes Commitments on Energy Marketing Credit Facility(06/01/2010) Back to Table of Contents

RAPID CITY, SD - June 1, 2010 - Black Hills Corp. (NYSE: BKH) energy marketing subsidiary Enserco Energy today announced that on May 28, 2010 the company closed an additional $23.5 million of credit capacity for its two-year, committed stand-alone credit facility. Through the additional participation of Credit Agricole, a participant in the previous facility, the facility size increases to $250 million from the initial $226.5 million announced on May 12, 2010. BNP Paribas and Societe Generale are co-lead arranger banks.

"This completes another positive financial milestone and we are pleased with the continued commitment from our bank group," said Tony Cleberg, executive vice president and chief financial officer of Black Hills Corp.

Permit for power plant in Brookings County approved by PUC(05/21/2010) Back to Table of Contents

PIERRE, S.D. – The South Dakota Public Utilities Commission gave unanimous approval this week for a 300-megawatt power plant to be constructed near White, S.D. Deer Creek Station will be built by Basin Electric Power Cooperative and will use natural gas combined-cycle technology to generate power to serve its member load requirements.

The action came during a regular commission meeting in Pierre on May 18. Basin Electric submitted an application to the PUC in July 2009. The 10-month review of the project included analysis of the permit application by a five-member PUC staff team and a study by a 12-member local review committee to consider the social and economic effect on the area.

Construction of the plant is expected to begin in the summer of 2010 and continue for 18 months. Total cost to build the facility, including a natural gas and a water pipeline necessary for its operation, is $400 million. The plant will have a gas turbine generator that produces power; waste heat from that process will be used to make steam which will generate additional electricity through a steam turbine.

Representatives of Basin Electric answered questions from the commissioners before the vote on Tuesday. Local Review Committee member Tony Simons of the Elkton School District was also on hand for the discussion.

“This $400 million of investment and 30 full-time jobs are a nice benefit that can occasionally accrue from building a safe, reliable and affordable system,” said PUC Chairman Dusty Johnson.

Steve Kolbeck, commission vice chairman, noted the detailed examination of the project. “I’m very, very impressed with the local review committee report,” he said. “This is a good day for South Dakota to welcome a $400 million project.”

“It was important for me to hear from the parties in this docket that the use of natural gas will not affect the price of natural gas to the consumers in South Dakota,” said PUC Commissioner Gary Hanson.

NorthWestern Energy Announces Heather H. Grahame to Join the Company as Vice President and General Counsel(05/21/2010) Back to Table of Contents

Sioux Falls, S.D. / Butte, Mont. – May 20, 2010 – NorthWestern Corporation d/b/a NorthWestern Energy (NYSE: NWE) today announced that Heather H. Grahame will be joining the company on August 2, 2010, as Vice President and General Counsel. In her role, Grahame will assume leadership of the Legal, Risk Management, Records Management and Corporate Governance functions of the Company. Timothy P. Olson, who has been serving as Interim General Counsel since January 2010, will retain the role of Corporate Secretary and will report to Grahame.

"We have spent the past few months conducting a comprehensive search for a General Counsel and are very pleased that Heather has chosen to join the NorthWestern team. She brings significant insight and experience in many areas of law including the very important area of public utility law. The need to work together to find sustainable energy solutions has never been greater. Heather’s experience and history of establishing constructive, substantive approaches to key legal and regulatory matters matches up perfectly with the way we prefer to address important subjects,” said Bob Rowe, NorthWestern Energy president and CEO. “I am also pleased that Tim has agreed to continue in the role of Corporate Secretary, where he has put his experience and judgment concerning sound corporate governance to great use," Rowe added.

Grahame, 55, has more than 26 years of legal experience, 20 years of which has focused on public utility law. Prior to joining NorthWestern, Grahame was a veteran partner in Dorsey & Whitney, LLP, where she co-chaired its Telecommunications practice. Grahame, who currently resides in Anchorage, Alaska, has been recognized repeatedly as a leading attorney in the United States. She is the author of numerous presentations and articles covering a range of topics from climate change to shifts in national policy. Grahame also has been recognized for her pro bono service. Grahame holds a B.A. in Human Biology from Stanford and a Juris Doctorate from the University of Oregon School of Law.

Xcel Energy Inc. Board Declares Dividend on All Outstanding Preferred Stock, Increases Common Dividend 3.1 Percent, Declares Dividend on Common Stock(05/19/2010) Back to Table of Contents

MINNEAPOLIS, May 19, 2010 (BUSINESS WIRE) --The Xcel Energy Inc. (NYSE: XEL) board of directors today declared regular quarterly dividends on all series of outstanding preferred stock, which are payable on July 15, 2010, to shareholders of record on June 24, 2010.

Series of Cumulative Preferred Stock Per Share	Dividend
$3.60 $4.08 $4.10 $4.11 $4.16 $4.56	$0.90 $1.02 $1.025 $1.0275 $1.04 $1.14

The board also raised the quarterly dividend on the company's common stock from 24.50 cents per share to 25.25 cents per share, which is equivalent to an annual rate of $1.01 per share. The board declared the second quarter common stock dividend payable July 20, 2010, to shareholders of record on June 24, 2010.

"The board recognizes the importance of the dividend to our shareholders. The increase in the dividend is consistent with our goal of growing the dividend 2-4 percent annually," said Richard C. Kelly, chairman and CEO.

Xcel Energy is a major U.S. electricity and natural gas company, with operations in 8 Western and Midwestern states. Xcel Energy provides a comprehensive portfolio of energy-related products and services to 3.4 million electricity customers and 1.9 million natural gas customers through its regulated operating companies. Company headquarters are located in Minneapolis. More information is available at www.xcelenergy.com.

This information is not given in connection with any sale or offer for sale or offer to buy any securities.

Williston Basin Interstate Pipeline to expand Bakken natural gas delivery volumes(05/19/2010) Back to Table of Contents

BISMARCK, N.D. - May 19, 2010 - Williston Basin Interstate Pipeline Company, the wholly owned natural gas transmission pipeline subsidiary of MDU Resources Group, Inc. (NYSE:MDU), announced plans to expand its existing natural gas pipeline capacity by approximately 33 percent in the Bakken production area in northwestern North Dakota.

The proposed expansion would add up to 30 million cubic feet per day (MMcf/d) to existing volumes from the Bakken production area for delivery to Northern Border Pipeline. The expansion project will be accomplished by adding facilities to an existing compressor station in northwestern North Dakota. The targeted in-service date of this expansion project is November 2011.

"Williston Basin owns and operates the most extensive transmission pipeline system in the Bakken production area and currently transports natural gas for most of the producers and processors active in the area," said Steven L. Bietz, president and CEO of Williston Basin. "We are very excited about the level of current activity in Bakken region and remain committed to expanding our transportation capacity from the area to ensure natural gas producers continue to have access to attractive markets. This latest project increases our delivery volumes out of the Bakken by one-third and further demonstrates our commitment to the region."

Williston Basin's existing natural gas pipeline system runs throughout the Bakken production area in western North Dakota and eastern Montana. Williston Basin completed a major expansion of its pipeline system in 2008 and currently transports approximately 90 MMcf/d per day of natural gas from 11 Bakken production area receipt points. Along with the currently proposed pipeline expansion project, Williston Basin is also working with numerous natural gas producers and processors to add additional natural gas receipt points to its system throughout the Bakken production area.

An open season for the Bakken Expansion Project will begin on May 19, 2010, and will run through June 2, 2010. Open season documents will be available on Williston Basin's website at www.wbip.com.

The information in this release includes forward-looking statements, including statements by the president and chief executive officer of Williston Basin Interstate Pipeline Company regarding plans to develop and potential benefits of expanding natural gas transportation volumes from the Bakken production area, within the meaning of Section 21E of the Securities Exchange Act of 1934. Although the company believes that its expectations are based on reasonable assumptions, actual results may differ materially. Important factors that could cause actual results to differ materially from those in the forward-looking statements include fluctuations in natural gas prices; the timely receipt of necessary permits and approvals; market demand for, and/or available supplies of, energy-related products and services; and unanticipated project delays. For a discussion of other important factors that could cause actual results to differ, refer to Item 1A - Risk Factors in MDU Resources' most recent Form 10-K and Form 10-Q.

Williston Basin Interstate Pipeline Company provides natural gas transportation and underground storage through a pipeline system spanning sections of North Dakota, South Dakota, Montana and Wyoming. Williston Basin is an indirect subsidiary of MDU Resources Group, Inc., a multidimensional natural resource enterprise traded on the New York Stock Exchange as "MDU." For more information about Williston Basin, visit the company's website at www.wbip.com.

Black Hills Power Receives Approval From The Wyoming Public Service Commission To Implement New Electric Service Rates(05/13/2010) Back to Table of Contents

RAPID CITY, SD, May 13, 2010 - Black Hills Corp. (NYSE:BKH) subsidiary Black Hills Power today announced that the Wyoming Public Service Commission issued a bench order approving the settlement stipulation agreement previously filed on May 4, 2010. The Commission approved new rates for the utility's Wyoming customers representing approximately $3.1 million in additional annual revenues, based on a return on equity of 10.5 percent with a capital structure of 52 percent equity and 48 percent debt to be effective for electricity service on and after June 1, 2010. Also approved was a new annual energy cost adjustment.

Black Hills Power's original rate request was filed on Oct. 19, 2009, to recover costs associated with Wygen III, a new coal-fired generation facility located near Gillette, Wyo., other generation, transmission and distribution investments and increased operating expenses since the utility's last Wyoming rate increase implemented in August of 1995. Since being filed, the rate request has undergone extensive review by the Wyoming Office of Consumer Advocate, the Commission and Commission staff. Negotiations between the OCA and Black Hills Power resulted in the settlement stipulation that was ultimately approved by the Commission.

"We're proud of our record of providing reliable electric service at fair and stable prices," said Chuck Loomis, vice president, operations for Black Hills Power. "We last received approval to increase our Wyoming prices nearly 15 years ago. Since 1995, electricity demand has continued to grow, so the Wygen III power plant was constructed to ensure the safe, reliable, service our customers expect. We believe that reaching a timely settlement with the parties to our rate request and receiving this approval from the Commission demonstrates the prudence of our investment in Wygen III and other system investments made to serve the communities in our service area."

When new rates become effective, a typical Black Hills Power residential customer in Wyoming using 600 kilowatt hours of power each month will see an increase of $13.92 per month, or about $0.46 per day, but the actual change in each customer's monthly utility bill will vary based on their electric service rates and electricity use. The increase experienced by Black Hills Power's commercial and industrial customers in Wyoming will vary depending on rate class and the amount and nature of their electricity use. Black Hills Power currently serves approximately 2,700 residential, commercial and industrial electric customers in northeastern Wyoming.

During the past 15 years, Black Hills Power residential energy consumption in Wyoming has increased 33 percent, and commercial energy consumption has increased 28 percent. When adjusted for inflation, the new Black Hills Power rates for Wyoming customers continue to be less than the rates implemented in 1995.

MDU Resources Declares Quarterly Dividends on Common and Preferred Stock(05/13/2010) Back to Table of Contents

BISMARCK, N.D. - May 13, 2010 - The MDU Resources Group (NYSE: MDU) board of directors today declared quarterly dividends on the company's common and preferred stock.

The dividend for common stock is 15.75 cents per share, unchanged from the previous quarter. Dividends for preferred stock are:

• $1.12-1/2 per share on 4.50 percent Series Preferred
• $1.17-1/2 per share on 4.70 percent Series Preferred
• $1.27-1/2 per share on 5.10 percent Series Preferred
br> The dividends are payable July 1, 2010 to stockholders of record June 10, 2010.

MDU Resources Group, Inc., a Fortune 500 company and a member of the S&P MidCap 400 index, provides value-added natural resource products and related services that are essential to energy and transportation infrastructure, including regulated businesses, an exploration and production company and construction companies. MDU Resources includes regulated electric and natural gas utilities and regulated natural gas pipelines and energy services, natural gas and oil production, construction materials and contracting, and construction services. For more information about MDU Resources, see the company's Web site at www.mdu.com or contact the Investor Relations Department at investor@mduresources.com.

Black Hills Corporation Completes New 2-Year Committed Credit Facility For Energy Marketing Business(05/11/2010) Back to Table of Contents

RAPID CITY, SD - May 12, 2010 - Black Hills Corp. (NYSE: BKH) energy marketing subsidiary Enserco Energy today announced the completion of a two-year, $226.5 million committed stand-alone credit facility expiring May 7, 2012 to replace its one-year, $300 million credit facility. The credit facility includes an accordion feature that allows the company to obtain additional commitments to an aggregate $350 million facility size. Later this month, the company expects to close an additional $23.5 million commitment with a lender in the previous facility, raising the total facility to $250 million.

"We are pleased with the continued commitment from our bank group and their agreement to move to a two-year term," said Tony Cleberg, executive vice president and chief financial officer of Black Hills Corp. "With lower commodity prices and lower usage on our previous facility, the $250 million facility gives us ample liquidity at the most economic cost. With the accordion feature, as prices improve, we have the flexibility to increase the facility to take full advantage of market opportunities while prudently managing our financing expenses and credit risk."

BNP Paribas and Societe Generale are co-lead arranger banks and The Bank of Tokyo-Mitsubishi UFJ, Rabobank, RZB Finance and U.S. Bank are participating banks. All of the banks were participants in the previous facility.

Enserco Energy Inc.
Enserco Energy Inc., a division of Black Hills Corp. (NYSE: BKH), specializes in the optimization of energy assets in the United States and Canada. More than 40 energy professionals are responsible for transactions in wholesale natural gas marketing and producer services for natural gas and crude oil.

Black Hills Corp. Reports First Quarter 2010 Results Strong Overall Performance and Strategic Initiatives on Track(05/06/2010) Back to Table of Contents

RAPID CITY, SD - May 6, 2010 - Black Hills Corp. (NYSE: BKH) today announced first quarter financial results. Income from continuing operations improved 23 percent for first quarter 2010 to $31.4 million or $0.81 per share compared to income from continuing operations for first quarter 2009 of $25.6 million or $0.66 per share. Net income for the three months ending March 31, 2010, was $31.4 million or $0.81 per share compared to net income of $26.4 million or $0.68 per share for the same period in 2009.

"We had a strong first quarter and continue to make significant progress with our strategic initiatives," said David R. Emery, chairman, president and CEO of Black Hills Corp. "Wygen III, our coal-fired power plant located at our Gillette Energy Complex, began providing energy to customers on April 1, 2010, ahead of schedule and under budget. Our plans are moving forward to construct two gas-fired generation facilities totaling 380 megawatts to serve our electric utility customers in southern Colorado, and we anticipate breaking ground this summer. Unification projects are in the final phases, and we expect to realize additional operating efficiencies by completing the integration of our core information technology systems and business processes by the end of this year." Click link - Black Hills 2010 1st Quarter Report - to view entire report.

Otter Tail Corporation Announces First Quarter Earnings; Reaffirms Earnings Guidance; Board of Directors - Declares Dividends(05/03/2010) Back to Table of Contents

FERGUS FALLS, Minn., May 3, 2010 (GLOBE NEWSWIRE) -- Otter Tail Corporation (Nasdaq:OTTR) today announced financial results for the quarter ended March 31, 2010.
Highlights
• Consolidated revenues were $262.2 million compared with $277.2 million for the first quarter of 2009.
• Consolidated operating income improved to $16.0 million compared with $8.6 million for the first quarter of 2009.
• First quarter 2010 results included a noncash charge to income tax expense of $1.7 million, or $0.05 per diluted share, related to a change in the tax treatment of postretirement prescription drug benefits under recent federal healthcare reform legislation.
• Consolidated net income was $4.7 million compared with $4.4 million for the first quarter of 2009.
• Diluted earnings per share totaled $0.13 compared with $0.12 for the first quarter of 2009.
• Earnings guidance of $1.00 to $1.40 per diluted share for 2010 is reaffirmed.

Click - Otter Tail First Quarter - to view complete report.

Black Hills Corp. Names John Vering Interim President And General Manager Of Oil And Gas Subsidiary(05/03/2010) Back to Table of Contents

RAPID CITY, SD - May 3, 2010 - Black Hills Corp. (NYSE: BKH) today announced a leadership change at its oil and gas subsidiary, Black Hills Exploration & Production. John Vering, current member of the Black Hills board of directors, has been named interim president and general manager of BHEP.

"Black Hills has been in the oil and gas business for nearly 25 years, and we continue to believe it will provide significant future value for our shareholders," said David R. Emery, chairman, president and CEO. "However, the recent performance of BHEP has been disappointing, and we are pleased that John has agreed to lead the effort to strengthen our long-term strategic plan and make improvements with an objective of achieving stronger financial and operational results."

Vering will replace current executive management for BHEP and report directly to Emery. In addition to serving as the interim president and general manager at BHEP, he will continue to serve as a Black Hills Corp. board member. He has more than 37 years experience in the oil and gas exploration and production industry. Vering held several senior executive roles, including president and CEO of Union Pacific Resources Inc., the Canadian affiliate of Union Pacific Resources Group, which was a $7 billion oil and gas company prior to its acquisition by Anadarko Petroleum Corporation in 2000. Vering has a bachelor's degree in mechanical engineering from the University of Nebraska and is a graduate of the executive development programs at Cornell and Harvard universities.

"John brings a tremendous breadth of industry and leadership experience to this role at BHEP, and I am confident in his ability to help us deliver the long-term shareholder value that our investors expect from Black Hills' oil and gas assets," Emery said.

MDU Resources to Present at American Gas Association Financial Forum(05/03/2010) Back to Table of Contents

BISMARCK, N.D. - May 3, 2010 - MDU Resources Group, Inc. (NYSE:MDU) will present at the 2010 American Gas Association Financial Forum at 9:45 a.m. EDT May 18. Terry D. Hildestad, President and Chief Executive Officer and Doran N. Schwartz, Vice President and Chief Financial Officer will discuss strategy and provide a financial overview.

The event will be webcast with a link available on the Company's website at www.mdu.com. Webcast replays also will be available.

Black Hills Corp. Announces Quarterly Dividend and Schedules First Quarter 2010 Financial Results, Conference Call and Webcast(04/30/2010) Back to Table of Contents

RAPID CITY, SD - April 30, 2010 - At a meeting held April 27, 2010, the board of directors of Black Hills Corporation (NYSE: BKH) declared a quarterly dividend on the common stock. Common shareholders of record at the close of business on May 18, 2010, will receive 36 cents per share, payable on June 1, 2010.

The company will issue a news release announcing 2010 first quarter results after market close on May 6, 2010, and host a live conference call and webcast at 11 a.m. ET on May 7, 2010, to discuss the company's financial and operating performance.

Those interested in listening to the live broadcast from within the United States can call 866-730-5765. International callers can call 857-350-1589. All callers need to enter the pass code 82052068 when prompted. To access the live webcast and download a copy of the investor presentation, go to the Black Hills website at www.blackhillscorp.com and click "Webcast" in the "Investor Relations" section. The presentation will be posted on the website prior to the webcast. Listeners should allow at least five minutes for registering and accessing the presentation. For those unable to listen to the live broadcast, a replay will be available on our website or by telephone through May 14, 2010, at 888-286-8010 in the United States and at 617-801-6888 for international callers. The replay pass code is 38795487.

MDU Resources Reports First Quarter Earnings, Reaffirms 2010 Earnings Guidance and Announces Niobrara Leasehold Additions(04/30/2010) Back to Table of Contents

Consolidated earnings of $41.6 million, or 22 cents per share.
Recent leasehold purchase expands Bakken oil play position to more than 56,000 net acres.
Recent agreements expand position in the emerging Niobrara oil play to more than 80,000 net acres.
Completed acquisition of Green River Basin producing properties, which include over 60 Bcfe of proved reserves with additional resource potential.
Solid balance sheet with equity of 63% of total capital.
Included on Fortune 500 list for second consecutive year.

Click link to view complete report - MDU First Quarter Earnings Report

NorthWestern Reports First Quarter 2010 Results(04/23/2010) Back to Table of Contents

Reports diluted EPS of $.79/share in 1Q 2010 compared to $.63/share in 1Q 2009

Reaffirms guidance for 2010 of $1.95 - $2.10 per fully diluted share

Declares a dividend of 34 cents per share

Sioux Falls, S.D. – Apr. 23, 2010 – NorthWestern Corporation d/b/a NorthWestern Energy (NYSE: NWE) reported financial results for the quarter ended March 31, 2010.

Highlights for the quarter include:

Net income improved by $5.9 million or 25.9% over the first quarter of 2009 due primarily to:

A decrease in operating, general and administrative expenses of $7.1 million, before tax;
A $3.4 million reduction in income tax expense due to obtaining, in the third quarter of 2009, Internal Revenue Service (IRS) approval of a tax accounting method change to deduct repairs that would have previously been capitalized;
Offset by a pre-tax gross margin decrease of approximately $1.6 million due primarily to decreased natural gas volumes from milder winter weather in Montana and decreased electric volumes from lower industrial demand relating to the weak economic climate;

Cash provided by operating activities totaled $106.3 million for the three months ended March 31, 2010 as compared with $65.1 million during the three months ended March 31, 2009 due to lower contributions to our qualified pension plans in 2010, which were substantially funded at December 31, 2009.

Click link for complete details on First Quarter Results.

PUC commissioners roll up sleeves for energy efficiency(04/16/2010) Back to Table of Contents

PIERRE, S.D. - South Dakota's three public utilities commissioners pulled out their toolboxes and got to work for the sake of energy efficiency today in Brookings. PUC commissioners Dusty Johnson, Steve Kolbeck and Gary Hanson participated in an energy-efficiency work project at the home of Kevin and Kelly Nelson on April 16. The Nelsons are representing South Dakota in the 30-60-90 Day Challenge, a national contest to determine which participant can conserve the most energy during a three-month period, which began in April.

The work team swapped high-energy-use incandescent light bulbs with energy-efficient compact fluorescent lights, insulated the water heater, added caulk around windows and installed a barrier around a leaking window well. The toolkit with the energy efficiency products was provided to the Nelsons by the contest host.

"The projects we completed are going to save the Nelsons money," stated PUC Commissioner Dusty Johnson. "Just changing their lights to CFLs will save about $36 over the bulb's lifetime," Johnson said.

Earlier this month, Brookings-based BTU Engineering donated their services to perform an energy audit at the Nelson home. The audit team used diagnostic tools to identify areas to improve. A blower door test measured the amount of air leakage and an infrared camera pinpointed areas of heat loss.

"The energy auditors used some pretty cool tools to analyze where we should focus our attention," said PUC Commissioner Steve Kolbeck. "However, any homeowner can conduct their own energy audit just by walking through their home with a checklist. Electrical outlets, switch plates and window frames are common places to check for air leaks," he suggested.

Steps for conducting a home energy audit are outlined on the South Dakota Energy Smart Web site, www.SDEnergySmart.com . South Dakota Energy Smart is a statewide initiative supported by the PUC and the state's energy providers that promotes energy efficiency. The Web site contains information on energy-saving solutions for homeowners and information about energy efficiency programs offered by local utility companies.

"Making energy-efficient home improvements really is worth the investment," said PUC Commissioner Gary Hanson "Typically, about 40 percent of a home's energy bill is for heating and cooling. To save on utility bills, be sure your systems are working as efficiently as possible. That means regular maintenance, like changing filters monthly and insulating ducts or pipes that travel through unheated spaces," Hanson said.

The 30-60-90 Day Challenge was launched by the National Association of Regulatory Utility Commissioners as a program within the organization's Anybody Can Serve, So Let's Conserve campaign. The goal is to motivate Americans to become more energy efficient. The winner of the 30-60-90 Day Challenge will receive payment of their utility bills for April, May and June. The Nelsons and other participants will blog about their experience throughout the challenge at http://anybodycanserve.ning.com.

Fitch Ratings Upgrades NorthWestern’s Credit Ratings(04/15/2010) Back to Table of Contents

Sioux Falls, S.D. – April 15, 2010 – NorthWestern Corporation d/b/a NorthWestern Energy (NYSE: NWE) today announced that Fitch Ratings (“Fitch”) upgraded NorthWestern’s ratings as follows:

To

From

Issuer Default Rating – Long Term

BBB

BBB-

Issuer Default Rating – Short Term

F2

F3

Senior Unsecured Debt

BBB+

BBB

First Mortgage Bonds

A-

BBB+

Fitch cited the Company's improved operating profile derived from recent investments in rate base assets. In addition, Fitch acknowledged the fact that NorthWestern’s service area has proven to be more resilient to the nationwide recession and NorthWestern has less exposure to industrial demand than most other integrated utilities.

All of NorthWestern’s senior secured debt is now low single “A” rated by Moody’s, Standard and Poor’s Rating Group, and Fitch.

“This is further indication that the rating agencies continue to recognize our strong credit profile with consistent cash flows derived from our regulated electric and gas jurisdictions,” said Chief Financial Officer, Brian Bird. “Our strong ratings are extremely important to the Company, as well as our regulators and our customers, in delivering value to our service territories.”

In addition, Bob Rowe, President and CEO said, “This action recognizes our long-term focus on our core business and our unwavering commitment to maintaining and improving our operating profile through prudent investments in our existing infrastructure and growth projects.”

Below is a chart outlining NorthWestern’s credit ratings at a glance.

	Senior Secured Rating	Senior Unsecured Rating	Outlook
Fitch	A-	BBB+	Stable
Moody’s	A3	Baa2	Positive
S&P	A-	BBB	Stable

Black Hills Corp. Announces Renewal of Revolving Credit Facility(04/15/2010) Back to Table of Contents

RAPID CITY, SD - April 15, 2010 - Black Hills Corp. (NYSE: BKH) today announced that it has entered into a new $500 million, unsecured revolving credit facility that will be used to fund working capital needs and for general corporate purposes. The new facility has a three-year term, expiring April 14, 2013. The previous $525 million revolving credit facility due May 4, 2010, was terminated. The costs of borrowings under the new facility are based on the company's credit rating and are currently at a spread of 275 basis points over LIBOR.

"We are pleased with the strong interest from our bank group and the new institutions in the revolving credit facility, which resulted in a substantial oversubscription," said Tony Cleberg, executive vice president and chief financial officer of Black Hills Corp. "The credit facility provides us ample liquidity during the next several years in support of our generation construction projects and other growth initiatives and will allow us the flexibility to efficiently raise long-term capital."

The Royal Bank of Scotland is the administrative agent for the Black Hills revolving credit facility; the co-lead arrangers and co-book runners are RBS Securities, the Bank of Nova Scotia and Union Bank. US Bank and Wells Fargo Bank are co-documentation agents.

Otter Tail Corporation Holds 2010 Annual Meeting | Shareholders Elect Directors; Board Elects Officers(04/12/2010) Back to Table of Contents

FERGUS FALLS, Minn., April 12, 2010 (GLOBE NEWSWIRE) -- Otter Tail Corporation (Nasdaq:OTTR) hosted 327 shareholders and guests at its annual meeting of common shareholders on Monday, April 12 in Fergus Falls, Minnesota. Represented by proxy or present in person at the meeting were 82% of the corporation's total shares outstanding. Shareholders reelected Arvid R. Liebe, John C. MacFarlane and Gary J. Spies to serve three-year terms on Otter Tail Corporation's board of directors.

Liebe, Milbank, South Dakota, is retired president of Liebe Drug, Inc. and owner of Liebe Farms, Inc. MacFarlane, Fergus Falls, Minnesota, serves as chair of the board at Otter Tail Corporation, and is the corporation's retired president and chief executive officer. Spies, Fergus Falls, Minnesota, is chairman of Service Food, Inc., and vice president of the Fergus Falls Development Company, Midwest Regional Development Company, LLC.

In his address to shareholders, Otter Tail Corporation President & CEO John Erickson acknowledged another challenging year, but also outlined reasons for optimism. "The economy remained weak in 2009, with the downturn broad, affecting almost all of our operating companies," said Erickson. "On the positive side, over the last six months, we've seen stabilization and maybe even a slight upturn in the economy. There are several bright spots moving forward. We have some of the best investment opportunities in years in the areas of generation, transmission and environmental upgrades. We also believe our early entry into renewable energy and our ongoing investments will position us well in this growing industry."

In a board meeting following the annual meeting, Otter Tail Corporation's board of directors elected Michelle Kommer, vice president of human resources, an executive officer. Kommer joined Otter Tail Corporation in 2006, and leads the organization's human resources function, ensuring people practices are aligned and integrated with the organization's goals, vision, mission, and values. Prior to her position in human resources, Michelle was an attorney for the organization, focusing on employment and corporate matters.

"Developing talented people and creating a workplace environment where they can thrive is central to both our vision and values," said CEO John Erickson. "As a key member of the executive team, Michelle has demonstrated her ability to help keep us true to these principles."

Kommer joins other executive officers John D. Erickson, president and chief executive officer, Lauris Molbert, executive vice president and chief operating officer, Kevin Moug, chief financial officer, and George Koeck, general counsel and corporate secretary.

Addition of NorthWestern to a Small cap Index Influences Trading Volume(04/12/2010) Back to Table of Contents

Sioux Falls, S.D. – April 12, 2010 – NorthWestern Corporation d/b/a NorthWestern Energy (NYSE: NWE) today announced that Standard & Poor’s (S&P) has added NorthWestern Energy to its SmallCap 600 group of stocks effective at the close of trading April 9. This announcement created a larger volume on NorthWestern’s common stock throughout last week.

"NorthWestern Energy is pleased to be included in the index because index investors are just the type of long-term investors that are most appropriate for a company such as NorthWestern," said Brian Bird, Chief Financial Officer.

New PUC legislation is friendly to small renewable energy systems(04/07/2010) Back to Table of Contents

Pierre, S.D. – New legislation that will become effective later this year will benefit owners of small wind turbines, solar energy equipment and geothermal systems. The 2010 legislature approved measures that reduce property tax and ensure fair prices for the sale of excess energy for owners of these and other types of small renewable energy facilities. The bills were introduced by the South Dakota Public Utilities Commission as part of its Small Renewable Energy Initiative and will become effective July 1, 2010.

Senate Bill 58 revises existing statute to make the first $50,000 of the assessed value of a small to medium renewable energy property, or 70 percent of the assessed value if that figure is greater, exempt from real property tax. The bill repeals 13 sections of the state tax code related to property tax reductions for small renewable systems.

In testimony before legislative committees, PUC Chairman Dusty Johnson stated the existing law is confusing and complex and treats various small renewable energy systems differently. “This property tax incentive is better than the one that’s in state law today,” he said. “The new legislation focuses on the big picture of incentivizing renewables. The change makes the system simpler and fairer,” Johnson concluded.

Senate Bill 61 is new legislation that requires electric utilities to file with the PUC their minimum rates for the purchase of electricity generated from renewable resources and produced by a facility that has a capacity of 100 kilowatts or less. The rates will be posted on the PUC Web site, www.puc.sd.gov, to allow the producer to easily review and compare rates to make an informed decision regarding the economics of a small renewable power facility.

"Purchasing and operating a small renewable energy system can be a significant investment,” said PUC Vice Chairman Steve Kolbeck. “The generator wants to consider all the financial facts up front, such as property taxes and the rate at which their local utility will buy excess power. This legislation gives them the means to review those rates quickly and easily anytime," he said.

The commission expects the new legislation to spur interest and action among South Dakotans who wish to generate their own electricity through renewable resources.

"Through our research and discussions with vendors, we understand there are about 180 small renewable facilities operating in the state,” said PUC Commissioner Gary Hanson. “Several of those owners, as well as representatives of the utility industry, offered comments that helped shape the final legislation," he said.

The PUC announced its small renewable energy initiative in June 2009. Other components of the initiative include interconnection rules approved in June 2009 and a model wind energy system ordinance for local governments drafted by the PUC in the fall of 2008. A fifth component, legislation to refund portions of the contractors excise tax on small renewable projects, was defeated by the 2010 legislature.

MDU Resources Announces Webcast of Analyst Conference Call(04/05/2010) Back to Table of Contents

BISMARCK, N.D. - Apr. 5, 2010 - MDU Resources Group, Inc. (NYSE:MDU) will webcast its first quarter 2010 earnings conference call April 30 following the release of its results.

The webcast will begin at 1 p.m. EDT and can be accessed at www.mdu.com. A webcast replay and audio replay will be available. The dial-in number for audio replay is (800) 642-1687, or (706) 645-9291 for international callers, conference ID 66644257.

First Quarter NorthWestern 2010 Financial Results(04/05/2010) Back to Table of Contents

NorthWestern's First Quarter 2010 Financial Results will be e-mailed to you. You may also find NorthWestern’s news release on PR Newswire.

FIRST QUARTER 2010 FINANCIAL RESULTS CONFERENCE CALL

A conference call to discuss financial results for the first quarter 2010 will be held:

Friday, April 23, 2010
11:00 a.m. (Eastern time)
10:00 a.m. (Central time)
8:00 a.m. (Pacific time)
Dial 800-230-1059

NorthWestern Corporation
First Quarter 2010 Financial Results
Host: Dan Rausch

If you are unable to participate in the conference call as scheduled above, a replay will be available beginning at 12:00 p.m. CT on April 23 through May 23, 2010. To access the replay, dial 800 475-6701, access code 152578.

The call also will be simultaneously broadcast on our Web site at northwesternenergy.com, and a replay will be available for 30 days following the conference call.

Black Hills Corp. And Department of Energy Reach Agreement For Smart Grid Funding (04/05/2010) Back to Table of Contents

Black Hills electric utility customers in Colorado, South Dakota and Wyoming will benefit from new Advanced Metering Infrastructure technology

RAPID CITY, S.D., April 5, 2010 - Black Hills Corp. (NYSE: BKH) announced today that it has successfully reached agreement with the Department of Energy for smart grid funding through grants totaling $20.7 million for its electric utility subsidiaries, Black Hills Energy - Colorado Electric, Black Hills Power and Cheyenne Light, Fuel & Power. The funds are made available under the American Recovery and Reinvestment Act of 2009 and, combined with matching investments from the Black Hills electric utilities, enable the installation of about 149,000 smart meters and related infrastructure investments.

"We are pleased to reach agreement with the DOE for smart grid funding. The integration of this technology will create operational efficiencies, reduce costs and allow us to provide additional energy services to our customers," said Linn Evans, Black Hills Corp. president and chief operating officer, utilities. "Our three electric utility applications were among the 100 selected by the DOE for grants, and as a result, our electric customers in Colorado, South Dakota and Wyoming will reap the benefits of new, innovative smart grid infrastructure."

Specifically, the DOE award agreements provide Black Hills Energy - Colorado Electric with approximately $6.1 million in matching funds for the installation of up to an additional 42,000 smart meters and communications infrastructure that will automate meter reading and enable a direct load control pilot program in its southern Colorado service area. Black Hills Power will receive approximately $9.6 million in matching funds, which is approximately $4 million more than the amount initially reported, for the installation of 69,000 smart meters, along with communications infrastructure, IT software and equipment necessary to initiate an advanced metering system in its western South Dakota and eastern Wyoming utility service areas. Cheyenne Light will receive approximately $5 million in matching funds for the installation of 38,000 smart meters and communications infrastructure in and around its Cheyenne, Wyo., service area. Black Hills Power and Cheyenne Light will begin AMI implementation throughout their service territories this year and Black Hills Energy - Colorado Electric will begin phase three of its AMI implementation, having already installed more than 56,500 smart meters and associated infrastructure in its service territory in 2009.

In Colorado, South Dakota and Wyoming, the Black Hills Corp. subsidiaries were the only investor-owned electric utilities selected to receive the DOE funding.

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