Stormwater Controls for Pollutant Removal on GDOT Right-of-Way

The Georgia Department of Transportation (GDOT) operates a large number of roadside stormwater treatment facilities to contain and treat roadside stormwater runoff. The stormwater best management practices (BMPs) were designed with an emphasis on the removal of suspended solids to reduce the turbidity loading on streams receiving discharge. This investigation was funded to perform monitoring of the stormwater quality leaving currently operating roadside stormwater treatment facilities on GDOT right-of-way. The study objective was to quantify the level of contamination leaving GDOT right-of-way, as well as the change in pollutant levels between the inlet and the outlet of the treatment facilities. Two permanent BMPs for collecting and treating runoff from the right-of-way of two state routes were monitored during the course of this study. One site is in the City of Canton and was monitored during construction of both an interchange improvement and an adjacent upstream shopping complex and after construction. The motivation for the construction of the Canton sand filter was to detain and treat roadway runoff being discharged to the habitat of the threatened Cherokee darter fish, which is a species endemic to the Etowah River system in North Georgia. The sand filter was constructed under an agreement between GDOT and the U.S. Fish and Wildlife Service. The other site is along McGuiness Ferry Road and was monitored during the construction phase only. Automatic samplers were used to collect first-flush samples, as well as composited flow-weighted samples for analysis. The in-situ parameters pH, temperature, and conductivity of the Canton sand filter were measured for 24 months at an interval of five minutes using in-situ measurement probes during construction.

• Record URL:
  http://g92018.eos-intl.net/eLibSQL14_G92018_Documents/07-27.pdf
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/24768
• Corporate Authors:

  Georgia Institute of Technology, Atlanta

  School of Civil and Environmental Engineering
  790 Atlantic Drive
  Atlanta, GA  United States  30332-0355

  Georgia Department of Transportation

  Office of Materials and Research, 15 Kennedy Drive
  Forest Park, GA  United States  30297-2534
• Authors:
  • Burns, Susan E
• Publication Date: 2012-4-11

Language

• English

Media Info

• Media Type: Web
• Edition: Final Report
• Features: Figures; Photos; References; Tables;
• Pagination: 149p

Subject/Index Terms

• TRT Terms: Best practices; Drainage; Pollutants; Runoff; Turbidity; Water pollution
• Geographic Terms: Georgia
• Subject Areas: Environment; Highways; Hydraulics and Hydrology; I15: Environment; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 01443820
• Record Type: Publication
• Report/Paper Numbers: GDOT PROJECT NO. 07-27
• Files: NTL, TRIS, STATEDOT
• Created Date: Aug 27 2012 9:04AM