Specifications include, but are not limited to: Proposals shall, at a minimum, accomplish the following Minimum Scope of Work: Ditching: Ditch will be excavated deep enough to drain the road base and handle an expected runoff depth of 1.5’ – 2’ deep. Ditch bank side slopes should be a maximum 2:1 horizontal to vertical ratio. Ditch should be at least 2’ wide forming a slightly rounded (parabolic) shape to help slow and disperse water. Stone line the ditch into a vegetated area whenever possible. Ditch stone shall be a minimum of 7” erosion stone. Temporary exposed ditch soils shall be covered with matting to reduce erosion during rain events. Contractor will complete the job with seed and mulch or hydroseeding any remaining exposed disturbed soils. Culvert Installation: Minimize disturbance to the natural system and surrounding land and install sandbag dams in the stream and use a pump, with riprap placed at the discharge, to convey the water around the excavation, if necessary. Excavate the culvert area; remove the old culvert if doing a replacement. The bottom width of the culvert trench should be twice the width of the culvert, with sidewalls no steeper than 1:1. Excavate 10 feet downstream of the culvert discharge to a depth of 18” for riprap. Use erosion control precautions; permit may be required. Lay pipe up slope, starting at outlet end. The longitudinal profile should be set at the same slope as the natural stream gradient. Where possible, a minimum of 18”-24” of fill over a culvert is recommended. Place 12 inch minus riprap in the excavated outlet area tamping it level with the stream bottom. Hydroseed all disturbed areas. Road Surface: Road material should be added by running a truck down the center of the roadway and dumping. Road should be rough graded after material is added. Road way compaction is only possible with adequate moisture. Contractor and Road Foreman will decide if water truck is needed at time of project start. An 8–10-ton vibratory roller shall be used for proper compaction. For the finish grade, all gravel roads shall be crowned, or in or out-sloped, with a slope of ¼” per foot of land width or 2%. Material may be purchased from RE Tucker, Twin State, Pike, McCullough Crushing Equipment Requirements: A minimum 12’ motor grader. An 8–10-ton vibratory roller. Water truck if needed to provide adequate moisture. The chosen Contractor will work under the direction of the Road Foreman. Invoicing shall be for work satisfactorily completed and paid per actual quantities used. The chosen Contractor shall warranty materials and workmanship for a period of one (1) year from the date of completion. The Contractor or their subcontractor shall complete all remedial/warranty work at no additional cost to the Town within 60 days of any such order to repair.
