Fitch Ratings has assigned an 'A-' rating to Boise Kuna Irrigation District Ada and Canyon Counties, ID's $41 million Arrowrock Hydroelectric Project (Arrowrock) revenue refunding bonds, series 2015. In addition, Fitch affirms its 'A-' rating on the following bonds:

--$38.6 million Arrowrock revenue bonds, series 2008.

Proceeds from the series 2015 bonds will be used to refund a portion of the outstanding series 2008 bonds for debt service savings and to shorten the maturity by one year. The bonds will be sold via negotiation the week of March 16.

The Rating Outlook is Stable.

SECURITY

The bonds are non-recourse revenue obligations of the issuer (Boise Kuna Irrigation District) and are payable solely from the funds pledged under the long-term power sales contract with Clatskanie People's Utility District (Clatskanie).

KEY RATING DRIVERS

SMALL HYDROELECTRIC PROJECT: The Arrowrock Hydroelectric Project (Arrowrock) is an 18MW hydro unit owned and operated by five irrigation districts (the districts), four of which are located in southwest Idaho and one in southeast Oregon. Project performance has been mostly sound since commercial operation began in 2010, with a three-month period of non-operation due to low hydrological conditions.

CONDITIONAL POWER SALES CONTRACT: Clatskanie People's Utility District (Clatskanie) is the purchaser of 100% of Arrowrock's output. The power sales contract requires Clatskanie to purchase the full output of the project and make payments sufficient to pay the project's O&M and debt service obligations. Fitch views Clatskanie's financial and credit profile as supportive of the 'A-' rating on the bonds.

PAYMENTS SUBJECT TO PERFORMANCE: Clatskanie's payment obligation is suspended if the project fails to produce electricity for 24 consecutive months or if net output for 48 months averages less than 20,000MWh per year.

CLATSKANIE's CUSTOMER BASE CONCENTRATION: Clatskanie's operating revenues are highly concentrated in a single large customer, Georgia Pacific, with two paper mills accounting for 86% of retail revenues in 2013. Retail rates would need to increase significantly to offset the load loss from the two mills.

RATE INCREASE TO IMPROVE METRICS: Clatskanie's financial metrics have weakened somewhat recently but are expected to improve in 2015 and 2016 following a 11% rate increase in October 2014. Fitch-calculated debt service coverage and coverage of full obligations in 2013 were 2.61x and 1.21x, respectively. Cash on hand was relatively low at 29 days although augmented by a line of credit that raised liquidity levels to a still low 51 days. Unaudited financials for 2014 reflect improvement in both coverage and liquidity ratios.

REDUCED RELIANCE ON WHOLESALE SALES: The recent rate increase will shift more costs to Clatskanie's retail rate base, which will remain comparatively low in the region. The reduced reliance on wholesale sales should provide additional financial stability.

RATING SENSITIVITIES

PROLONGED OPERATIONAL PERFORMANCE: The project has exceeded the minimum performance measures to date, although the project did not generate power for a three-month period in 2013 due to very low hydrology conditions. Negative rating action will occur if operational performance approaches either of the two payment suspension triggers.

LOSS OF LARGE CUSTOMER: The loss of one or both of the Georgia Pacific paper plants is an ongoing concern, as Clatskanie would need to significantly raise rates to maintain adequate financial metrics for the rating.

CREDIT PROFILE

LONG-TERM POWER SALES CONTRACT

The districts entered into a long-term power sales contract with Clatskanie for the sale of the project's net output. The contract expires on March 1, 2039, matching the expiration of the FERC license for the project. The final bond payment, which is made June 1, 2039, will be structured to be paid from partial-year revenues received through March 1, 2039.

Under the contract's term, Clatskanie pays 90% of the monthly average Dow Jones Mid-Columbia Index for the power. The monthly index price paid is subject to a maximum cap but the capped price is not viewed as a risk to full cost recovery under the contract. If payments due at the monthly index price are insufficient, Clatskanie is required to prepay for the energy in amount sufficient to fully cover operation and maintenance costs of the project and debt service. Due to low market power prices, Clatskanie has prepaid for energy since 2011.

Clatskanie is also required by the contract to maintain its own electric rates sufficient to meet O&M and debt service obligations on the project. The contract requires Clatskanie to continue making payments while it disputes such payments or its obligation to make them.

SOUND PROJECT PERFORMANCE

The project has performed well to date, exceeding the minimum performance standards that would trigger a suspension of Clatskanie's payments. Fitch views the occurrence of a suspension event as unlikely. On both measures, actual performance has far exceeded the minimum requirements that would trigger a suspension of Clatskanie's payments. The year 2013 was a dry year with the Boise river run-off at 56% of the historical average. Generation in that year fell to a low of 48,972 MWh, which remained more than double the 20,000 average annual amount required under the sales contract. The project did not generate power for three months in the same year due to the dry conditions, far less than the 24 consecutive month period required to trigger a payment suspension.

RATE INCREASE EXPECTED TO IMPROVE CLATSKANIE'S FINANCIALS

Clatskanie's financial metrics are adequate and support the project's 'A-' rating. Clatskanie's financial performance is expected to improve over the near term due to the recent 11% rate increase (16.84% rate increase for residential customers) implemented in October 2014 and an additional 2.2% rate increase for industrial customers effective Oct. 1, 2015. These rate increases should raise operating margins which have declined in recent years due to mild winter weather and reduced wholesale revenue.

Debt service coverage and coverage of full obligations remained adequate at 2.61x and 1.21x, respectively, in 2013. Cash levels remain relatively low at 29 days. Liquidity levels are somewhat better due to a line of credit that ended the year with $2.5 million in available credit, raising liquidity to a still low 51 days.

Unaudited financial statements for 2014 show improvement due to increased wholesale revenues, the rate increase effective in October, and other factors. Preliminary Fitch calculated debt service coverage is 3.11x and days cash on hand increased to 46 (29 in 2013).

SINGLE-CUSTOMER CONCENTRATION

Clatskanie's distribution system serves approximately 4,600 predominately residential customers in a 275 mile service territory on the Oregon side of the Washington-Oregon border, approximately 75 miles northwest of Portland. The vast majority of Clatskanie's MWh sales (88%) and operating revenues (86%) are derived from sales to two paper mills owned by Georgia Pacific.

The potential loss of the mills remains an on-going concern, although management has received no indication that either mill is closing. The likely rate increase necessary if the mills were to close would be substantial and implementation would present political and economic challenges.

Additional information is available at 'www.fitchratings.com'.

Applicable Criteria and Related Research:

--'Revenue-Supported Rating Criteria' (June 16, 2014);

--'U.S. Public Power Rating Criteria' (March 18, 2014);

--'U.S. Public Power Peer Study Addendum - February 2015' (Feb. 9, 2015).

Applicable Criteria and Related Research:

U.S. Public Power Peer Study Addendum -- February 2014

http://www.fitchratings.com/creditdesk/reports/report_frame.cfm?rpt_id=735601

U.S. Public Power Rating Criteria

http://www.fitchratings.com/creditdesk/reports/report_frame.cfm?rpt_id=740841

Revenue-Supported Rating Criteria

http://www.fitchratings.com/creditdesk/reports/report_frame.cfm?rpt_id=750012

Additional Disclosure

Solicitation Status

http://www.fitchratings.com/gws/en/disclosure/solicitation?pr_id=980827

ALL FITCH CREDIT RATINGS ARE SUBJECT TO CERTAIN LIMITATIONS AND DISCLAIMERS. PLEASE READ THESE LIMITATIONS AND DISCLAIMERS BY FOLLOWING THIS LINK: HTTP://FITCHRATINGS.COM/UNDERSTANDINGCREDITRATINGS. IN ADDITION, RATING DEFINITIONS AND THE TERMS OF USE OF SUCH RATINGS ARE AVAILABLE ON THE AGENCY'S PUBLIC WEBSITE 'WWW.FITCHRATINGS.COM'. PUBLISHED RATINGS, CRITERIA AND METHODOLOGIES ARE AVAILABLE FROM THIS SITE AT ALL TIMES. FITCH'S CODE OF CONDUCT, CONFIDENTIALITY, CONFLICTS OF INTEREST, AFFILIATE FIREWALL, COMPLIANCE AND OTHER RELEVANT POLICIES AND PROCEDURES ARE ALSO AVAILABLE FROM THE 'CODE OF CONDUCT' SECTION OF THIS SITE. FITCH MAY HAVE PROVIDED ANOTHER PERMISSIBLE SERVICE TO THE RATED ENTITY OR ITS RELATED THIRD PARTIES. DETAILS OF THIS SERVICE FOR RATINGS FOR WHICH THE LEAD ANALYST IS BASED IN AN EU-REGISTERED ENTITY CAN BE FOUND ON THE ENTITY SUMMARY PAGE FOR THIS ISSUER ON THE FITCH WEBSITE.

Fitch RatingsPrimary AnalystMatthew ReillyDirector+1-415-732-7572Fitch Ratings, Inc.650 California StreetSan Francisco, CA 94108orSecondary AnalystHugh WeltonDirector+1-212-908-0742orCommittee ChairpersonKathy MastersonSenior Director+1-512-215-3730orMedia Relations:Elizabeth Fogerty, New York, +1 212-908-0526Email: elizabeth.fogerty@fitchratings.com