00677736

Component

http://onlinepubs.trb.org...trr/1994/1471/1471-005.pdf

https://scholar.google.co...hols&publication_year=1994

The Environmental Protection Agency (EPA) has required the South Carolina Department of Transportation (SCDOT) to obtain National Pollutant Discharge Elimination System permits for storm water discharges from construction sites. EPA has assigned regulatory authority for issuing these permits to the South Carolina Department of Health and Environmental Control (DHEC). Additional regulatory requirements have been implemented by DHEC's delegated authorities. These additional requirements further define the EPA regulatory requirements and mainly comprise limits on the effluent from construction-site runoff. The effluent limits for construction-site runoff have been set to achieve an equivalent removal efficiency of 80% for suspended solids or a peak settleable solids concentration of 0.5 ml/L. Only one of these effluent limitations must be met to satisfy the permit requirements. DHEC's delegated authorities will issue permits on the basis of standard engineering calculations that show that the proposed sediment basins will meet the required effluent limitations. A computer program named SEDIMOT is recommended by DHEC's delegated authorities to establish the sediment basin sizes. SEDIMOT was used to model standardized sediment basins that will be used by SCDOT throughout South Carolina. The state was divided into two hydrologic regions (Piedmont and Coastal Plain), and two statewide soil categories were determined for the computer simulations. A range of sediment basin sizes was determined with SEDIMOT that meets effluent limitations for each region and soil category in the state. This information was summarized in charts for SCDOT to use in the design of sediment basins. The charts provide the required sediment basin size depending on the drainage area for each region and soil category in the state. SCDOT intends to use the charts to determine the sediment basin sizes that will be included in permit applications to DHEC's delegated authorities.

This paper appears in Transportation Research Record No. 1471, Recent Research on Hydraulics and Hydrology. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01396802

English

p. 31-37

1994

Transportation Research Record

0309061040

Figures (11) ; References (4) ; Tables (3)

Computer programs; Construction sites; Design charts; Drainage; Drainage basins; Effluents; Permits; Regulations; Runoff; Simulation; Size; Soil types

Hydrologic regions

South Carolina

South Carolina

Highways; Hydraulics and Hydrology; Law; I26: Water Run-off - Freeze-thaw

TRIS, TRB

May 23 1995 12:00AM

• CORRELATION OF PAVEMENT SURFACE TEXTURE TO HYDRAULIC ROUGHNESS
• DEVELOPING EROSION CONTROL PLANS FOR HIGHWAY CONSTRUCTION
• FLOOD ANALYSIS IN DUPAGE COUNTY USING HYDROLOGICAL SIMULATION PROGRAM--FORTRAN MODEL
• HYDRAULICS OF SAFETY END SECTIONS FOR HIGHWAY CULVERTS
• HYDROLOGIC ENGINEERING CENTER MODELS FOR URBAN HYDROLOGIC ANALYSIS
• IMPROVEMENTS IN CURB-OPENING AND GRATE INLET EFFICIENCY
• MULTILANE HIGHWAY DESIGN CROSSFALL AND DRAINAGE ISSUES
• SCOUR AROUND WIDE PIERS IN SHALLOW WATER
• SMALL URBAN WATERSHED USE OF HYDROLOGIC PROCEDURES
• URBAN HYDROLOGY DESIGN USING SOIL CONSERVATION SERVICE TR-55 AND TR-20 MODELS