RICHLAND COUNTY

Rose Drive - Upstream and downstream ditch wall failure and ditch bottom sedimentation.
Hydrangea Street- Upstream and downstream ditch wall failure and ditch bottom
sedimentation.
Plowden Road Bridge - Just upstream of the bridge is the worst area for sediment deposition.
The tributary widens just above the Plowden Road Bridge; the water slows down and sediment
drops out. Downstream of the bridge, sediment is also excessive.
Railroad Access Road – The tributary is directed beneath the railroad tracks and associated
access road by two seventy-two inch (72”) pipes. Upstream the tributary appears to be in a
natural state with no obvious sediment or erosion issues. There is less canopy cover on the
downstream side, but no excessive erosion was noted.
South Beltline Blvd. Curve - The tributary is directed beneath South Beltline via large culverts
placed at a sharp angle. The water backs up, erodes the bank, and deposits sediment in the
ditch on both sides of South Beltline. The angle of the culverts also creates a log jam effect
with debris backing up on the upstream side of the culvert.
Wetland Mitigation - A parcel of R13611-02-17 (shown in attachment C) was identified as a
probable site for wetland mitigation/conservation.
Scope of the project: The general scope is to provide engineering services to perform
maintenance and repairs to the ditch identified in Attachment A (map attached). Scope includes
removal of over grown vegetation, removal of accumulated sediment, performing repairs to the
creek and application of appropriate bank & bed “localized” stabilization to the mentioned
section of ditch to prevent future erosion/scouring. It is to be noted that this project is not a full
length stream stabilization project.
Also, the project includes performing a feasibility study to involve parcel R13611-02-17,
shown in Attachment C to mitigate wetlands/conserve property and buffer the airport.
Scope of services: The services to be provided under this project will include:
Surveying - The engineer will provide all design surveying and initial construction staking.
As-built surveying will be performed upon completion and delivered in accordance with
Richland County’s Digital Data Submission Requirements.
Permits - The engineer will prepare and submit all applicable permit applications and followup
through approval prior to advertisement of the project for construction bidding.
Geotechnical Investigation - The engineer will provide all subsurface exploration and soil
testing required, if any, to accomplish the design phase.
Design Calculations - The engineer will perform all engineering calculations necessary to
complete the plans and contract documents for the project. Neighborhood meetings may be
C:\Documents and Settings\swoffordc\Local Settings\Temporary Internet Files\Content.Outlook\X3UBAFYB\Devils
Ditch_CIP_RFP (1) (2).doc
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