The purpose of this project is to dredge approximately 105 cubic yards of sediment (covering approximately 3,201 square feet) from the Taylors Point Channel as depicted in the accompanying plans titled “Town of Bourne 10 Year Comprehensive Permit Amendment Request” dated 08/01/25 and as specified in the permits and comment letters listed below. The dredged depth is -8.2 Navd88 (-6.0 MLW). The contractor shall include their proposed means and methods for construction with their bid. Permits: OOC SE7-2052, MA DEP 401 WQC Transmittal # X28399, USACE project # NAE-2019-02774 Comment Letters: NHESP 19-38503, MA DMF The work would include the following: 1. Mobilization and site preparation a. Attend a pre-construction meeting with the Town Engineer and Consulting Engineer (BSC Group) to review the contractor’s means and methods. b. Conduct a before-dredge (BD) hydrographic multibeam or single beam survey in accordance with the USACE manual for hydrographic surveying EM 1110-2-1003 specifications and provide survey data point files, plans, and volume calculations to the town of Bourne and their consulting engineer BSC Group for their review and confirmation. c. Install and maintain a tide board relative to NAVD88 or MLW datums. If MLW datum is used, the conversion factor from NAVD88 to MLW as shown on the provided plans should be used. d. Install and maintain a silt boom along the perimeter of the dredge area to contain turbidity caused by dredging. e. Install and maintain buoys or other navigational aids to mariners as necessary to maintain safe navigation around the work area. 2. Dredging, dewatering, and sediment disposal a. Dredging to be completed by mechanical means such as an excavator on a barge or clamshell. Must be complete by 1/15/2026. b. Dredged sediment shall be temporarily placed within a containment basin on the barge, a scow, or stockpiled within a dewatering area constructed on the boat ramp using concrete jersey barriers or other approved equivalent method. c. Once dewatering is complete, the sediment shall be transported to a pre-approved upland disposal facility that is certified to handle dredged sediment. The contractor shall provide the anticipated upland disposal site and method of transportation (by truck or barge) along with their means and methods for the work. Remediation of dewatering site must be complete by 3/1/2026. 3. De-mobilization and site restoration a. Prior to de-mobilization, the contractor shall conduct an after-dredge (AD) hydrographic survey as previously specified and provide survey data point files, plans, and volume calculations to the town of Bourne and their consulting engineer BSC Group. b. Upon confirmation of the AD survey data, the contractor shall remove the silt curtain (silt boom), buoys or any other navigational aids to mariners that were installed, and all associated construction equipment
