Lower Snake River Dam Capital
Cost Estimate Reporting, 2017-2021
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|
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|
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|
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