Presentation on theme: "The South Carolina Design-Build Experience Presented by: Rocque L. Kneece, P.E."— Presentation transcript:
The South Carolina Design-Build Experience Presented by: Rocque L. Kneece, P.E.
I-95 Honda Interchange $ 8 million COMPLETE Wateree River $ 8 million COMPLETE Reedy & Enoree Bridge* $ 3 million COMPLETE SC 170 Widening $80 million ACTIVE Cooper River Bridge $ 531 million ACTIVE Conway Bypass $ 386 million COMPLETE Southern Connector $ 206 million COMPLETE Carolina Bays Parkway (1) $232 million COMPLETE Carolina Bays Parkway (2) $ 54 million ACTIVE D ESIGN -B UILD P ROJECTS Brockman-McClimon Interchange $ 52 million SELECTION
Carolina Bays Parkway Horry County, SC New Location Freeway 22 miles in Length Includes Right of Way Acquisition $232 million
Project Statistics n Length (Hwy 17) – 3.5 miles n Drilled Shafts - 427 n Concrete – 308,000 CY (poured in place) n Rebar – 53,000 tons n Structural Steel – 43,000 tons n Concrete Girders – 717 n Bridge Deck – 2 million sq. ft. (28 lane-miles) n ONLY 4.92 acres of environmental impacts!
QA/QC BASIC STRUCTURE QC Testing by Contractor Acceptance Testing by DOT DOT Test Rate Equals 20% of QC Testing Independent Assurance Testing by DOT
QA/QC PERSONNEL PROJECT DOT CONTRACTOR QA/QC QA/QC ENOREE/REEDY R. BRS. WATEREE R. BRIDGE SC 170 WIDENING CAROLINA BAYS PKWY-1 COOPER RIVER BRIDGE 1 3+ 1 5+ 5+ 9+ 9+ 12+ 18+ 20+ DESIGN-BUILD CONTRACTS Contract ResponsibilityNot a Contract Responsibility
The Environmental Challenge n Sediment and Erosion Control n Construction Access n Hazardous Materials n Turtle Lighting n Community Impacts
The Environmental Challenge n Joint Environmental Inspections –Contractor and DOT Contractor has a full time environmental inspector on the project n Full Time SCDOT Environmental Consultant n Together, the team of environmental professionals functions to ensure environmental compliance and to expedite the environmental process.
Sediment & Erosion Control n Approximately 2 miles of silt fence, 10 temporary sediment basins, and several check dams among other control measures are installed on the project. n Contractor and SCDOT have strict inspection processes in place to monitor erosion control measures. n Inspections weekly and after every.50” rain
Hazardous Materials n SCDOT has remediated five UST’s, disposed of more than 100 cubic yards of contaminated material, and abated lead based paint and asbestos from structures ranging from houses to bridge. n During the construction of the CRB, SCDOT has spent an additional half million dollars for handling of hazardous materials/waste encountered during construction.
Pumping material from an abandoned UST encountered in the Charleston Interchange.
Potential Turtle Impacts n Concerns raised that bridge lights may disturb loggerhead hatchlings n Aesthetic Lighting Modified –Lights are controlled by timer –Lights may be dimmed –Lights may be turned off
Community Impacts n Nine homes within the project ROW were relocated for affordable housing. n The homes were placed on new foundations at various sites in the community and are being renovated through a partnership between SCDOT and the City of Charleston.
Lessons Learned Lessons Learned n Include the Draft Contract with the RFP n Include Schedule of Values in Contract n QC/QA - Trust but verify n Independent Assurance by DOT n Be sensitive to the community concerns n Make Partnering a Key Element n Establish Lines of Communication n Time really is money – make decisions quickly