Navigation lock notices can be found here:
Notices to Navigation Interests (NTNI) site
Type the NTNI number (listed in parenthesis) into the search bar to bring up the notice you're after. Searches can also be made by river and river basin.
Most recent notices:
21-02 (12636) March 2021 NWW Annual Navigation Lock Maintenance Outage
21-01 (12635) McNary Navigation Lock Outage
20-23 (12580) HLD LMA and LGA Floating Guidewall Restrictions
20-21b (12423-2) Second Amendment to Lock Closures at LMA for Floating Guide Wall Work
20-22 (12502) Winter Recreational Vessel Lockage Schedule
20-21a (12423-1) Amendment to Lock Closures at LMA for Floating Guide Wall Work
20-21 (12423) Lock Closures at LMA for Floating Guide Wall Work
20-20b (12180-2) Second Amendment to Lock Closures at Lower Monumental for Floating Guidewall Work
20-20a (12180-1) Amendment to Lock Closures at Lower Monumental for Floating Guidewall Work
20-20 (12180) Lock Closures at Lower Monumental for Floating Guidewall Work
20-17a (11960-1) Amendment to Lower Granite Lock Delay for Tainter Valve Work
20-19 (12049) Slower Lockages at Lower Monumental
20-13a (11799-1) LMA and LGA Floating Guidewall Restrictions
20-18 (11992) 2020 Summer Lockage Hours schedule for Recreational Vessels
20-17 (11960) Lower Granite Lock Delay for Tainter Valve Work
20-16a (11921-1) Amendment to Ice Harbor Transit Delays
20-16 (11921) Ice Harbor Transit Delays
20-15 (11898) Slower Lockages at Lower Monumental
20-14 (11809) HLD Floating Guidewall Restrictions
20-13 (11799) LMA and LGA Floating Guidewall Restrictions
20-03e (11051-5) Fifth Amendment to 2020 NWW Annual Maintenance Outage
20-03d (11051-4) Fourth Amendment to 2020 NWW Annual Maintenance Outage
20-12 (11654) MOP Operations and Spring Spill Operations
20-03c (11051-3) Third Amendment to 2020 NWW Annual Maintenance Outage
20-03b (11051-2) Second Amendment to 2020 NWW Annual Maintenance Outage
20-10 (11499) Ice Harbor Diver Work at Floating Guide Wall
20-09a (11421-1) Amendment to Lowering of Lower Granite Pool
20-09 (11421) Lowering of Lower Granite Pool
20-08a (11356-1) McNary Navlock Temporary Closure
20-08 (11356) McNary Navlock Temporary Closure
20-07a (11269-1) Lower Monumental Navlock Out of Service
20-07 (11269) Lower Monumental Navlock Out of Service
20-06a (11262-1) Ice Harbor Navlock Slower Lockages
20-06 (11262) Ice Harbor Navlock Slower Lockages
20-05 (11261) LLA Lowering of Pool for PIT Tag Work
20-04 (11128) Ice Harbor Navlock Temporary Closure
20-03a (11051-1) Amendment to 2020 NWW Annual Navlock Maintenance Outage
20-03 (11051) 2020 NWW Annual Navlock Maintenance Outage