US Army Corps of Engineers
Walla Walla District Website

Lower Monumental Master Plan

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***Comment Period extended to Sept. 30*** The U.S. Army Corps of Engineers (Corps), Walla Walla District, is preparing to revise the 1966 Lower Monumental Master Plan, with accompanying Environmental Assessments. As part of the process, the Corps has scheduled two open house scoping meetings to gather input from public, local, state, and Federal agencies and Tribes.

Tuesday, August 20, 2019 from 4:00 to 7:00 p.m.
Formal presentations at 5:00 and 6:00 p.m.
Best Western Plus Dayton Hotel and Suites, Dayton, WA

Wednesday, August 21, 2019 from 4:00 to 7:00 p.m.
Formal presentations at 5:00 and 6:00 p.m.
Silver Room: Red Lion Hotel and Conference Center, Pasco, WA

These meetings are designed to inform the public regarding the Master Plan revision process and receive comments on how users would like to see the Corps manage the natural and recreational resources related to Lower Monumental and Little Goose in the future.  The meetings will include stations staffed by Corps personnel presenting various aspects of the projects answering questions, and receiving comments.

The Corps welcomes your participation. If you are unable to attend either open house, written comments will be accepted from Aug. 12 to Sept. 13, 2019 ***(extended to Sept. 30)*** through U.S. mail, email, the online comment form or through the online comment form below. Any comments received will be considered for both the development of the Master Plan and Environmental Assessment to evaluate the effects of the Corps Master Plan. 

Mailing address:
U.S. Army Corps of Engineers
Walla Walla District
ATTN:  Lower Monumental
201 North 3rd Avenue
Walla Walla, WA  99362


A master plan is the guidance document that describes how the resources of the project will be managed in the future and provides the vision for how the project should look in the future. It’s typically updated every 20 years. The master plan does not address issues such as flood risk management (levees/dams/channels/etc.), operational areas (dam, navigation lock, fish passage facilities, power house, etc.) and water level management, which are addressed in other guidance documents. 

Development of the revised master plan will include consideration of regional and ecosystem needs as well as public interests and desires. 

Lower Monumental Master Plan was last completed in 1966, and a lot has changed since then:  

•The 1966 Master Plan focused on initial recreational development and less on natural resources and fish and wildlife.

•Original land classifications do not meet current Corps regulations.

•There are new invasive and ESA-listed species to be considered in the management of project lands and waters.

While no two visitors share exactly the same vision of how the project should look in 20 years, we believe all have its best interest in mind.

Lower Monumental Master Plan Comment Form Instructions

Please fill out the form below. Comments that are submitted will be incorporated into a new Master Plan for the lands managed by the Lower Monumental Natural Resources staff. This new draft document will be shared for additional comments in the future. The comment period ends Sept. 13, 2019 ***(extended to Sept. 30)***All comments submitted will be considered and become part of the permanent public record. For more information about the Lower Monumental Master Plan revision, please contact the Lower Monumental Master Plan coordinator at 509-527-7137.


Contact Us

U.S. Army Corps of Engineers 
ATTN: OD-T Lower Monumental MP Revision
201 N. 3rd Ave. 
Walla Walla, WA 99362 


Online Map

Online Map

This map gives GIS data on each land management unit for the Lower Monumental and Little Goose Projects.  You can make general comments through this map, or comment on specific pieces of land.  You do not have to create a user ID to comment using this map.