Sand Lake NWR South Dakota, HOUGHTON DAM REMOVAL: contractor shall provide all material, equipment, labor and supervision to remove a 110-foot long service spillway; work includes excavating a trapezoidal channel through the dam at EL. 1282.5¿ comprised of a 150-long bottom dimension with side slopes of 3(H):1(V); installation of rip-rap (D50=12 minus) along the crest, bottom and side-slopes of the new excavation as indicated on the construction drawings; and install a new 20 ft. wide guardrail barrier on the dam crest where indicated on the construction drawings for the Houghton Dam Structure at Sand Lake National Wildlife Refuge. Our point of contact for this effort is the Contracting Officer, Mr. Tim Officer 303-236-4320 or via email tim_officer@fws.gov. Amendment 0002
