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Lower Snake River Dam Capital Hydropower Improvement Projects Cost Estimate Reporting, 2017-2021 Bonneville Power Administration

As part of ongoing litigation on Columbia River System Operations (CRSO), Bonneville and the Corps are providing information to National Wildlife Federation (NWF) on certain planned projects at the four Lower Snake River dam and reservoir projects through the end of the CRSO National Environmental Policy Act (NEPA) process (September 24, 2021). Information on the CRSO NEPA process can be found here: www.crso.info/.

The four Lower Snake River dam and reservoir projects are Ice Harbor, Lower Monumental, Little Goose and Lower Granite and are located in eastern Washington. Bonneville and the Corps are providing information on three categories: 1) Capital Hydropower Improvement Projects; 2) Columbia River Fish Mitigation (CRFM) Projects; and 3) Other Non-Power Capital Projects (e.g. navigation).

The documents below meet the criteria established in the Notification Process the District Court of Oregon approved on May 25, 2017. These documents provide a brief description of the project, an estimated schedule for completion, along with a range for estimated project cost.

This site will be updated on a periodic basis if additional projects in the above categories are approved by the Capital Workgroup or funded by congressional appropriation at the four Lower Snake River dam and reservoir projects during the CRSO NEPA process.

Ice Harbor	Main Unit 4-6 Surface Air Cooler Upgrades	$1 - $3 million
Ice Harbor	Oil Water Separation	$1 - $3 million
Ice Harbor	Station Service Transformers Replacement (transformers TWO and TJO)	$1 - $3 million
Ice Harbor	Surge Arrester 115kV Disconnect Upgrades	$3 - $7 million
Ice Harbor	Transformer Deluge Fire Protection System Upgrades	$1 - $3 million
Total		$7 - $19 million
Lower Monumental	Headgate Repair Pit Upgrade	$1 - $3 million
Lower Monumental	Direct Current System, Governor Oil Pump System, and Low Voltage Switchgear Upgrades	$3 - $7 million
Lower Monumental	Drainage and Unwatering Pump Replacement	$3 - $7 million
Lower Monumental	Oil Water Separation	$3 - $7 million
Total		$10 - $24 million
Little Goose	Drainage and Unwatering Pump Replacement	$3 - $7 million
Little Goose	Headgate Repair Pit Upgrade	$1 - $3 million
Little Goose	Oil Water Separation	$1 - $3 million
Little Goose	Powerhouse Roof Replacement	$1 - $3 million
Total		$6 - $16 million
Lower Granite	Juvenile Fish Facility System Upgrade	Greater than $12 million /w a recent expansion of more than $1 million to total project estimate.
Lower Granite	Oil Water Separation	$1 - $3 million
Lower Granite	Main Units 1-6 Digital Governors Installation	$3 - $7 million
Total		$16 - $22 million
Lower Snake Dams Total		$39 - $81 million