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
Carolina Bays Parkway - The Quality Challenge -
Quality Materials - Procedures
Carolina Bays Parkway
QA/QC RESPONSIBILITY QA/QC Testing by Contractor Job Control Testing Used for Acceptance Independent Assurance Testing by DOT Discrepancies in Test Results resolved by third party testing
Additional Measures by DOT Assigned Resident Construction Engineer Hired Consultant for Monitoring and Testing DOT sets 10% Independent Test Ratio
QA/QC COMMITMENT PROJECT DOT CONTRACTOR QA/QC QA/QC ENOREE/REEDY R. BRS. WATEREE R. BRIDGE SC 170 WIDENING CAROLINA BAYS PKWY COOPER RIVER BRIDGE
Cooper River Bridge Charleston, SC $532 million
Project Location New location
Project Statistics n Length (Hwy 17) – 3.5 miles n Drilled Shafts 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 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
Temporary Sediment Basin
Construction Access n A total of 3 temporary construction trestles were erected for the project. n Greatly minimized impacts to wetlands while still allowing construction access.
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
LAST LESSON LEARNED
BE CAREFUL OUT THERE… You never know what you might find.