Surplus River Sand & Gravel and Concrete Demolition Rubble Available for Industry Use

SCOPE OF THE PROPOSED ACQUISITION: The U.S. Army Corps of Engineers (USACE), Pittsburgh District is planning to replace the existing 56’ x 360’ auxiliary lock chamber with a new 110’ x 600’ main lock chamber at Montgomery Locks & Dam. Preliminary designs estimate that the construction will generate roughly 650,000 cubic yards of dredge material, 125,000 cubic yards of stone material, and 90,000 cubic yards of concrete rubble. The Government is surveying the market to determine the level of interest of the local construction industry in obtaining this material for its use. The Government does not intend to acquire real estate or make available any real estate to facilitate the handling or processing of these materials. Composition of Dredged River Sediments: In general, the dredged material includes cobbles/boulders, gravel, sand and silt/clay. Based on soil test results, the average percentages of gravel, sand & silt/clay are: Gravel: 36 % Sand: 47 % Silt & Clay: 17% Refer to attached summary table for minimum & maximum percentages of gravel, sand and silt/clay. Cobbles and boulders were encountered at a few borings. Refer to the attached summary table for the presence of cobbles/boulders at borings. Attachments (combined as one (1) document): Boring Locations Plans Summary of Laboratory Testing Results and Presence of Cobbles/Boulders Core Box Photos Showing Boulders Geological Profiles/Sections

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Exterior Improvements, Common Work Results for Exterior Improvements, Aggregates for Exterior Improvements.