Specifications include, but are not limited to: The site area is approximately 1.4 acres, which has been inundated with slide material from the head of the water shed. Currently more material is at the top of the watershed and will make its way down over time. The proposed project (approximately 1.4 acres) consists construction of an earthen embankment. This will protect the roadway and rail line below. This will be paid for under the Earthwork (Catch Basin) bid item. This embankment will serve as a catch basin for slide material that will continue move downward from the upper part of the watershed. An Earthwork (Embankment Benching) is included to over excavate and re-compact material the catch basin will be seated on. An earthwork (Measured) is included remove material from the site, and transport and place it in the designated waste area. A 36" DWPP pipe with headwalls will allow surface water to drain from the basin, through the embankment and daylight to a roadside ditch. A gravel / excavate rock road will lead to the top of the embankment, to allow the basin to be cleaned during large sliding events. Class III Backfill is included to protect the interior toe of the embankment from erosion. Hoe Ram is setup to excavate bedrock for construction of the basin. Class III bid item is included for a roadside ditch to allow for passage of surface water.
