Chief Joseph Dam Debris Boom Replacement

Abstract added, see attachment C.04 W912DW23B0010 ABSTRACT - CJD Debris Boom Signed Amendment 0007 - Issued 4/28/2023 -Update the Liquidated Damages to $1,865.00. Amendment 0006 - Issued 4/21/2023 - TOC revised to add requirements to submit price schedule, reps/certs, and Pre-Award Info, POC changed to Scott Houts, extension of bid date. Amendment 0005 - Issued 4/18/2023 - Spec revisions and extension of bid due date - Amendment 0004 - Issued 4/11/2023 - Revision to specs/plans. Amendment 0003 - Issued 4/3/2023 - Posting of Site Visit Attendance List. Amendment 0002 - Issued 3/22/2023 - Revises the point of contact and the virtual bid opening details. Amendment 0001 - Issued 3/15/2023 - Revises the Request for Visitation Authority (RVA) document. The hour and date specified for receipt of Offer is not extended. Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect. Chief Joseph Dam Debris Boom Replacement OVERVIEW: The U.S. Army Corps of Engineers (USACE), Seattle District, requires the replacement of the debris boom at the Chief Joseph Dam. The Chief Joseph Dam is located near Bridgeport, WA and is on the Columbia River 51 miles downstream of the Grand Coulee Dam. The general scope includes, but is not limited to, the following: a. A new north shore anchor (right bank) will be installed using rock anchors or an equivalent horizontal sub-surface soil anchor system capable of resisting the maximum expected boom tension. This anchor will be similar to the existing north shore (right bank) anchor system. b. A new 2,500 foot total length steel cable will be installed to anew north shore (right bank) anchor. This cable will have manufactured composite buoys or a similar debris diversion barrier installed to contain and move debris to the south shore stilling basin. c. A steel boat gate, as part of the debris boom requirements, will be fabricated using structural steel and connect the cable spans. This boat gate will have an above water access arm that is remote controlled. d. The south shore (left bank) anchor will remain in-use, while the north shore (right bank) anchor will be abandoned in-place. Connection of the new boom cable will occur concurrently when the existing debris boom cable is disconnected. The south shore anchor shall only have one connected boom at a time. e. The existing debris boom cables for all spans will be demolished. The cables connecting the debris boom to the in-water concrete cofferdams will be disconnected or cut above the two existing coffer dams in-water below. In-water cables will be disconnected or cut after the cable is pulled or positioned vertically above the in-water anchor and slack is removed to minimize the amount to be abandoned. f. The existing debris boom and all cables will be removed and disposed of by the contractor. g. Removal of the 234-buoy system and associated cables and attachments. h. The existing in-water concrete coffer dams will be abandoned in-place. i. Utilize of underwater ROV for cutting underwater cable/chain and taking video of existing underwater anchor and foundation being abandoned. j. Removal of approximately 180 linear feet surface conduit and wires from north shore to the junction box in the existing cathodic protection system. The magnitude of construction is estimated to be between $1 million and $5 million.