SCOPE OF WORK

September 3, 2024

BASE BID ONE - BARRANCAS AVENUE DRAINAGE IMPROVEMENTS PROJECT

The northernmost right of way and travel lane of Barrancas Avenue experienced issues with standing stormwater issues as well as water overtopping the curb. This is due to the existing stormwater conveyance system being undersized for its contributing basin’s flow. This project will serve to increase the flow capacity of the conveyance system by installing additional inlets and upsizing the existing stormwater piping. As a result of these improvements, work site safety, MOT, dewatering, maintenance/bypass of stormwater flow, and erosion control will be paramount issues.  General work to be accomplished will include installation of new storm structures, new storm pipe, curb and gutter and sod.

BASE BID TWO - MAIN STREET FLOODING AND ADAPTATION PROJECT

The scope of work within this project relates to the construction of a Stormwater treatment tree well, drainage improvements along S B Street, and replacement of a portion of existing sewer main. For the drainage improvements, work includes removal and installation of upsized stormwater pipe, methods to include open trench and jack and bore, removal and replacement of existing drainage structures, construction of new curb inlet tops, replacement of concrete curb and gutter, and construction of concrete sidewalks. Work for the stormwater treatment tree well entails excavation, placement of structural soil modules, drainage stone, base aggregate, engineered stormwater treatment soil, and tree planting. The implementation of solid and perforated pipes is also required with the addition of the grated inlets constructed into the curb. For the reconstruction of the ECUA Sewer main, scope includes replacement of existing sewer gravity main, installation of shallow manhole, and replacement of laterals. In addition, the plans call for extended curb design for improved pedestrian safety at the intersection of Government Street and B Street as described in the Contract Documents.