Lower Pool Workboat Mooring Area, Dashields Locks and Dam

Lower Pool Workboat Mooring Area, Dashields Locks and DamThe U.S. Army Corps of Engineers, Pittsburgh District, has a project that involves construction of an anchored sheet pile wall along the Ohio River to create a workboat mooring area at Dashields Locks and Dam, Allegheny County, PA. The work is to be performed from the landward side of the existing lower guide wall which is accessed from an existing parking lot adjoining to Dashields Lock Road. The contract generally includes construction of an anchored sheet pile wall approximately 80 feet long, located between the Dashields Locks and Dam lower guide wall and the existing parking area, followed by limited underwater excavation to create draft and a footprint for safe mooring of the facility?s workboat. Mooring and access appurtenances including an access ladder and a variable height mooring system with integrated fender system shall also be installed at the rear face of the lower guide wall as part of this contract. The major features of the requirements are identified below:The contract specifically includes:a. Erosion and sediment controls consistent with the magnitude and scope of projects involving work on a waterway.b. Removal and salvage, including stockpiling and replacement, of existing riprap slope protection along the riverbank.c. Sheet pile driving parallel to an existing lock wall with active river navigation.d. Installation of post-tensioned multi-strand tie-back anchors.? Drilling and casing inclined boreholes through soil and bedrock.? Watertightness testing and grouting.? Connection of anchor to sheet pile wall structure.? Anchor post-tensioning including proof and performance testing.e. Underwater excavation and disposal of excavated materials.f. General earthwork including excavation and slope grading.g. Limited mechanical demolition of concrete rubble and large diameter rock to facilitate construction.h. Design and installation of a variable height, slide based mooring system to be installed at the rear face of the existing concrete lower guide wall.i. Removal, replacement, modification, and new construction of security fencing on various mounting surfaces.j. Removal and replacement of guiderail.Excavated soils must be disposed of at a commercially permitted facility licensed to accept the material. Concrete rubble and other construction waste material must also be disposed of at a commercially permitted facility licensed to accept the waste or recycled if applicable. AMENDMENT 0001 *Visit 'https://piee.eb.mil/sol/xhtml/unauth/search/oppMgmtLink.xhtml?solNo=W911WN23B8004' to obtain more details.* BID OPENING RESULTS POSTED. AMENDMENT 0002 CANCELLED SOTICITATION!