A.03 MSH SRS SCR Plans - Copy opt.pdf

The file A.03 MSH SRS SCR Plans - Copy opt.pdf is a solicitation document for the Mount Saint Helens Sediment Retention Structure Crest Raise project, issued by the U.S. Army Corps of Engineers, Portland District. The project involves constructing an increased sediment retention structure on the North Fork Toutle River in Cowlitz County, Washington, with the primary objective of providing additional sediment storage and maintaining existing river flows while protecting levee systems from Castle Rock to Lexington.

The project scope includes comprehensive construction activities such as mobilization/demobilization, river diversion, rock excavation, rock foundation preparation, dental concrete placement, roller-compacted concrete placement, outlet works sealing, and associated related work. This is the second of three planned crest raises, with the original structure initially constructed in the late 1980s to prevent sediment from flowing down to the lower Cowlitz River. Contractor access will be via gravel access roads on the dam site, the embankment dam roadway, concrete outlet works structure, and a paved roadway on the spillway approach pier. The solicitation number is W9127N25BA007, with recent updates indicating that project plans were uploaded on 28-JUL-25.