NOTICE TO NAVIGATION INTERESTS
WALLA WALLA DISTRICT DATE: 09/24/2025 NOTICE NUMBER: 212009
ATTN: CENWW-DE
201 NORTH THIRD STREET
WALLA WALLA WA 99362-1976
HTTP://WWW.NWW.USACE.ARMY.MIL/		 POC:
Kenny Koebberling (509) 527-7364 LOCAL NUMBER: 25-37
WTRWY/CHNL: NWWLOCK(S): CO 24|SN 01|SN 02|SN 03|SN 04
EFFECTIVE: 02/21/2026 00:00 thru 03/28/2026 23:45 PST
________________________________________________________________________________________________________________________

2026 WALLA WALLA DISTRICT NAVIGATION LOCK MAINTENANCE OUTAGE

The annual maintenance lock closure for the Walla Walla District, U.S. Army Corps of Engineers is scheduled for February and March 2026. Work to be performed includes annual inspections of hydraulic structures at Ice Harbor and McNary, unwatering of the locks at McNary, Ice Harbor, Little Goose, and Lower Granite, commissioning of the new electrical system at McNary, as well as routine annual maintenance of mechanical equipment at the locks.

 

Locks will be out of service during the dates and times specified in the table below:

 

2026 Navigation Lock Maintenance Closure

 

 

District

Project

Location

Closes

Reopens

Walla WallaMcNaryColumbia River Mile 29212:01 a.m., 21 February 202611:59 p.m., 28 March 2026
Walla WallaIce HarborSnake River Mile 9.712:01 a.m., 21 February 202611:59 p.m., 28 March 2026
Walla WallaLower MonumentalSnake River Mile 41.612:01 a.m., 21 February 202611:59 p.m., 28 March 2026
Walla WallaLittle GooseSnake River Mile 70.312:01 a.m., 21 February 202611:59 p.m., 28 March 2026
Walla WallaLower GraniteSnake River Mile 107.512:01 a.m., 21 February 202611:59 p.m., 28 March 2026

 

 

This is a Columbia/Snake River System navigation outage.  Dates for lock closures in the Portland District are published separately.  For additional information regarding Portland District (NWP) lock maintenance closures, contact the Portland District Operations Division at (503) 808-4866. For additional information regarding Walla Walla District (NWW) maintenance activities you may contact Operations Division at (509) 527-7364.

 
//signed//


Paul A. Ocker, Chief, Operations Division