8a. 23947073_SPECIFICATION.pdf

DIVISION 01 - GENERAL REQUIREMENTS

01 10 00-GENERALPARAGRAPHS

PART 1 GENERAL

1. 01

1. 02

SCOPE OF WORK: Provide all labor, materials, and equipment necessary to dredge and dispose of sediment from the mooring basin and boat lift areas at U.S. Coast

Guard (USCG) Station Cape Disappointment, located within

Baker Bay in Ilwaco, Washington. Dredge approximately

15,000 cubic yards (cy) of sediment from the USCG Station

Cape Disappointment boat basin by hydraulic or mechanical means to the indicated design depth of -10.0 feet Mean

Lower Low Water (MLLW) plus 2 feet over depth allowance.

The dredged sediment shall be permanently disposed of using a bottom dump barge, scow, or hopper dredge, in the

Baker Bay Flow Lane Disposal (BB-3) within the Columbia

River in Clatsop County, Oregon. The Coast Guard has been authorized to dredge outside of the permitted in-water work window. All other requirements of the attached permits remain the same. The contractor is expected to mobilize for pre-dredge Eelgrass and hydrographic surveys as soon as possible and to produce a Dredge Operations

Plan (DOP) within 30 days of award (to include the surveys). The contractor shall begin dredging as soon as a notice to proceed is received by the United States Army

Corps of Engineers (USACE) following approval of the DOP, while implementing requirements and best practices identified in the attached permits. Dredging must be complete by June 1, 2024.

BASIS FOR BIDS

Mobilize and demobilize personnel and equipment including the dredge, barge, scow, hydraulic pipeline, trucks, and other equipment necessary to complete the work. Prepare a

Dredge Operations Plan, conduct pre-and post- dredge hydrographic surveys, and conduct pre-dredge and post dredge eelgrass surveys. Include all direct costs not associated with the dredging operation.

1) Mobilization & preparation of dredging and disposal site(s) and demobilization.