# Charleston Civicplus #60646440

Charleston Dupont-Wappoo Watershed Infrastructure Construction Opportunity

**Posted:** September 28, 2026
**Respond By:** October 16, 2026
**Identifier:** 60646440
**NAICS:** 237110, 237990, 237310

The City of Charleston Department of Stormwater Management is seeking qualified construction contractors for major infrastructure improvements in the Dupont-Wappoo Watershed.
- Government Buyer:
  - City of Charleston, Department of Stormwater Management
  - Project managed by Mr. Matthew Fountain, P.E. & P.G., Director
- Scope of Work:
  - Demolition and removal of existing storm drains, curbs, gutters, driveways, aprons, sidewalks, and trees
  - Installation of new storm drain pipes and structures (including reinforced concrete pipes in sizes 12"–48")
  - Excavation and grading of drainage channels, ditch improvements, and import of engineered fill and topsoil
  - Water and sanitary sewer line relocation, gas main replacement, and hydrant assembly installation
  - Construction of new curbs, gutters, sidewalks (ADA-compliant), driveway aprons, and driveways
  - Milling and resurfacing of roadways, crosswalk striping, and traffic control
  - Installation of sediment and erosion control devices (silt fence, sediment tubes, erosion control blankets)
  - Removal and replacement of chain link fences, mailbox relocation, and tree protection barricades
  - Site restoration, permanent grassing/seeding, and as-built record drawings
  - Survey and geotechnical investigation services (channel slope recommendations, soil stabilization)
- Notable Requirements:
  - Compliance with City’s Small Business Enterprise (SBE) program (20% participation target)
  - Adherence to SCDOT encroachment permit and stormwater management approvals
  - Strict technical specifications for ADA compliance, geotechnical recommendations, and SCDOT traffic control
  - Liquidated damages of $500/day for delays beyond 200-day contract duration
- OEMs and Vendors:
  - No specific OEMs or product manufacturers are named; opportunity is open to qualified construction contractors
- Products/Services Requested:
  - Extensive list of construction line items including removal and installation of various sizes of reinforced concrete pipes, junction boxes, inlets, headwalls, driveway and sidewalk materials, erosion control products, and water/sewer infrastructure
  - Geotechnical and soils investigation services
  - Traffic control and site restoration services
- Unique Requirements:
  - Project must meet ADA standards for sidewalks
  - Channel slopes must be maintained at 2:1 and stabilized with clayey sands and vegetation
  - SBE participation and compliance with state/local permits are mandatory

### Description

The City of Charleston is soliciting bid proposals for construction services related to infrastructure improvements in the Dupont-Wappoo Watershed. The project scope includes demolition of existing storm drain, curb and gutter, driveway aprons, driveways, and trees; installation of storm drain pipes and structures; excavation and grading of an existing open drainage channel; adjustment and installation of water appurtenances; relocation of water and sanitary sewer service lines; installation of curb and gutter, sidewalk, driveway aprons, and driveways; milling and surfacing with traffic control markings; removal and replacement of fences; installation of sediment and erosion control devices; clearing and grubbing; restoration of disturbed areas; traffic control; and preparation of as-built record drawings. Bids are due by October 16, 2026, at 2:00 pm.

[View original listing](https://www.charleston-sc.gov/bids.aspx?bidID=903)