SECOND AMENDMENT TO NAVIGATION NOTICE 12180-1, 20-20a:
NAVIGATION LOCK CLOSURES LOWER MONUMENTAL LOCK AND DAM
Notice Number: 11239 / 12180-2
Local Number: 20-20b
Effective: 07/27/2020 08:00 thru 07/30/2020 20:00 PST
Until further notice, the Lower Monumental Navigation Lock will remain open during all hours to navigation traffic as preparations are made to perform emergency repairs to the floating guide wall. Until repairs are made, river traffic may not impact, rub against, or use the guide wall as a pivot for entering the lock.
It is expected that daily closure of the lock will be required for repair of the guide wall when preparations are completed. Separate notification of that work timeframe will be provided.
The Navigation Lock at Lower Monumental Lock and Dam will be closed daily starting 24 July 27 July 2020, between the hours of 0800-2000. These outages are necessary for divers to perform removal and replacement of a lock floating guide wall service cable that holds the guide wall in place. The work is planned for completion by 14 August 17 August 2020. This adjustment to the previous schedule is necessary due to delays in fabricating the cable sockets for the new cable.
PROJECT AFFECTED: Lower Monumental Lock and Dam - Snake River Mile 41.6
River users may contact the Lower Monumental Shift Operator at (509) 282-7231, or VHF-FM Channel 14 using call sign WUJ43 Lower Monumental, to determine if the daily work schedule allows for an earlier opening on that particular day.
Navigation Business Line Manager
Walla Walla District, USACE