Specifications include, but are not limited to: Includes the removal of an existing 8.5’ diameter steel culvert and concrete block headwalls and wingwalls; construction of cofferdams for bypass flows during construction; installation of a new 24’ span by 9’ rise, 32’ long 4-sided concrete box culvert, with headwalls and wingwalls; placement of channel bed material and regrading along approximately 100 feet of Stony Brook; placement of bank rock in the vicinity of the new structure; placing fill above the culvert and restoration of approximately 125 feet of gravel roadway; installation of guardrail; and all associated road, bank, stream and erosion control work.; Staging and Storage: Approximately 1,100 SF of staging area is available in the road immediately west of the project area (see Sheet 3). The CONTRACTOR may also adjust placement of safety barriers to create additional staging within the road, as long as adjustments do not impact neighboring residences. Overall, all areas on which fill and and/or equipment is stored shall be returned to their original pre-construction condition following construction (except for those areas in the road to be filled/regraded).; Construction Layout: The CONTRACTOR will be responsible for layout of the work based on control points shown on the plans. However, the ENGINEER will be able to assist and confirm layout as needed.; Construction Sequencing: The ENGINEER has provided a Construction Sequence in the notes on Sheet 4. The CONTRACTOR may submit an alternate Construction Sequence that complies with permits to be reviewed and approved by the ENGINEER and OWNER.; Concrete Blocks: Waste blocks that comprise the existing headwalls and wingwalls are to be salvaged and returned to the Town Garage or other town designated area. The CONTRACTOR is to coordinate removal of the blocks with the OWNER and ENGINEER prior to the start of construction.; Bank Rock: We expect that there is enough bank rock/riprap already on site to be used following construction of the box culvert, primarily adjacent to the proposed wingwalls. However, if more bank rock is needed, we have included Bank Rock as Item 12 in the Schedule of Items (attached). While the quantity provided is currently zero, please still provide a unit cost in the event we have to source bank rock from offsite.; Roadway Restoration: Approximately 3.5’ of fill will be placed on top of the box culvert following installation. Guardrail will be installed following completion of filling and grading, per alignments on Sheet 6 and details on Sheets G-1 and G-1D. See proposed road grades on Sheet 6, profile at the bottom of Sheet 7 and Gravel Road Section on Sheet 8.; Surplus Fill: The Town is interested in any surplus fill generated by the work. The CONTRACTOR shall coordinate transport of surplus fill to Town facilities.
