The South Carolina The South Carolina Design-Build ExperienceDesign-Build Experience

Presented by: Rocque L. Kneece, P.E.Presented by: Rocque L. Kneece, P.E.

I-95 Honda Interchange$ 8 millionCOMPLETE

Wateree River $ 8 millionCOMPLETE

Reedy & Enoree Bridge* $ 3 millionCOMPLETE

SC 170 Widening$80 millionACTIVE

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 millionACTIVE

DESIGN-BUILD

PROJECTS

Brockman-McClimon Interchange$ 52 millionSELECTION

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

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

1 3+

1 5+

5+ 9+

9 12+

Cooper River Bridge Charleston, SC $532 million

Existing Bridges

Project Location

New location

Project StatisticsProject Statistics

Length (Hwy 17) – 3.5 milesLength (Hwy 17) – 3.5 miles Drilled Shafts - 427Drilled Shafts - 427 Concrete – 308,000 CY (poured in place)Concrete – 308,000 CY (poured in place) Rebar – 53,000 tonsRebar – 53,000 tons Structural Steel – 43,000 tonsStructural Steel – 43,000 tons Concrete Girders – 717Concrete Girders – 717 Bridge Deck – 2 million sq. ft. (28 lane-miles)Bridge Deck – 2 million sq. ft. (28 lane-miles) ONLY 4.92 acres of environmental impacts!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 Responsibility Not a Contract Responsibility

The Environmental ChallengeThe Environmental Challenge

Sediment and Erosion Control Sediment and Erosion Control Construction AccessConstruction Access Hazardous MaterialsHazardous Materials Turtle LightingTurtle Lighting Community ImpactsCommunity Impacts

The Environmental ChallengeThe Environmental Challenge Joint Environmental Inspections Joint Environmental Inspections

– Contractor and DOT Contractor and DOT Contractor has a full time Contractor has a full time environmental inspector on the projectenvironmental inspector on the project

Full Time SCDOT Environmental Consultant Full Time SCDOT Environmental Consultant Together, the team of environmental Together, the team of environmental

professionals functions to ensure professionals functions to ensure environmental compliance and to expedite the environmental compliance and to expedite the environmental process.environmental process.

Sediment & Erosion ControlSediment & Erosion Control

Approximately 2 miles of silt fence, 10 Approximately 2 miles of silt fence, 10 temporary sediment basins, and several check temporary sediment basins, and several check dams among other control measures are dams among other control measures are installed on the project.installed on the project.

Contractor and SCDOT have strict inspection Contractor and SCDOT have strict inspection processes in place to monitor erosion control processes in place to monitor erosion control measures.measures.

Inspections weekly and after every .50” rainInspections weekly and after every .50” rain

Temporary Sediment Basin

Construction AccessConstruction Access

A total of 3 temporary construction A total of 3 temporary construction trestles were erected for the project.trestles were erected for the project.

Greatly minimized impacts to wetlands Greatly minimized impacts to wetlands while still allowing construction access.while still allowing construction access.

Hazardous MaterialsHazardous Materials

SCDOT has remediated five UST’s, disposed of SCDOT has remediated five UST’s, disposed of more than 100 cubic yards of contaminated material, more than 100 cubic yards of contaminated material, and abated lead based paint and asbestos from and abated lead based paint and asbestos from structures ranging from houses to bridge.structures ranging from houses to bridge.

During the construction of the CRB, SCDOT has During the construction of the CRB, SCDOT has spent an additional half million dollars for handling spent an additional half million dollars for handling of hazardous materials/waste encountered during of hazardous materials/waste encountered during construction.construction.

Pumping material from an abandoned UST encountered in the Charleston Interchange.

Potential Turtle ImpactsPotential Turtle Impacts

Concerns raised that bridge lights may Concerns raised that bridge lights may disturb loggerhead hatchlingsdisturb loggerhead hatchlings

Aesthetic Lighting ModifiedAesthetic Lighting Modified– Lights are controlled by timerLights are controlled by timer– Lights may be dimmedLights may be dimmed– Lights may be turned offLights may be turned off

Community ImpactsCommunity Impacts Nine homes within the project ROW were Nine homes within the project ROW were

relocated for affordable housing.relocated for affordable housing.

The homes were placed on new foundations at The homes were placed on new foundations at various sites in the community and are being various sites in the community and are being renovated through a partnership between renovated through a partnership between SCDOT and the City of Charleston.SCDOT and the City of Charleston.

Lessons LearnedLessons Learned

Include the Draft Contract with the RFP Include the Draft Contract with the RFP Include Schedule of Values in ContractInclude Schedule of Values in Contract QC/QA - Trust but verifyQC/QA - Trust but verify Independent Assurance by DOTIndependent Assurance by DOT Be sensitive to the community concernsBe sensitive to the community concerns Make Partnering a Key ElementMake Partnering a Key Element Establish Lines of CommunicationEstablish Lines of Communication Time Time reallyreally is money – make decisions quickly is money – make decisions quickly

LAST LESSON LEARNEDLAST LESSON LEARNED

BE CAREFUL OUT THERE… You never know what you might find.