Mosquito Creek Rip Rap Extension

Seeking information to assist in creating contract documents to extend the upstream riprap at the Mosquito Creek Dam, Cortland, Ohio. The existing riprap extends from the upstream toe of the embankment partially up the slope. The remainder of the slope is grass covered. The government intends to remove the existing vegetation protection and extend the riprap on the upstream slope to the embankment crest. - There are three potential work areas identified approximately 6,000 ft in total length (Phase I: 1700 LF, Phase II: 1750 LF and Phase III: 2600 LF): - Procure and deliver aggregate filter and riprap materials in sufficient quantities and frequency to prevent delays. - Work around and under the intake tower access bridge, including removal of vegetation and upper soil fill and placing filter and riprap materials. - Place filter and riprap around existing utility poles - Work around flowable fill used to backfill voids during previous removal of utility poles - Preserve the integrity of existing dam monitoring instrumentation (piezometers, settlement and alignment pins) along the upstream face and crest of the dam - Excavate and dispose of some of dam embankment materials for toe key and vegetated upstream dam facing - Extend an existing culvert located within the proposed work area

Division 31 -	Earthwork, Excavation and Fill, Fill, Backfill, Trenching and Backfilling, Erosion and Sedimentation Controls, Caissons, Excavated Caissons.
Division 32 -	Exterior Improvements, Base Courses, Aggregate Base Courses.
Division 33 -	Utilities, Storm Drainage Utilities, Culverts, Ponds and Reservoirs.
Division 35 -	Waterway and Marine Construction, Shoreline Protection, Waterway Construction and Equipment.
Division 41 -	Material Processing and Handling Equipment.