SUSPENDED-SEDIMENT DISCHARGE, IN FIVE STREAMS NEAR HARRISBURG, PENNSYLVANIA, BEFORE, DURING AND AFTER HIGHWAY CONSTRUCTION

Rainfall, streamflow, sediment, and turbidity data were collected as part of study to evaluate the effects of highway construction on suspended-sediment discharge in streams. Although highway construction increased suspended sediment discharges from two to four-fold, the rate of sediment discharge quickly returned to pre-construction levels when construction ended. The most effective sediment control evaluated was off-stream ponds, which were designed to trap and store sediment ladden water from the construction area. The off-stream ponds trapped about 70 percent of the sediment that reached them during most storms. An onstream pond, constructed on a large stream below the construction area, reduced sediment loads about 80 percent. However, unlike the off-stream ponds, which stopped discharging runoff water soon after precipitation ended, the onstream pond kept discharging runoff water, and the stream below the pond remained turbid for extended periods. (FHWA)

  • Corporate Authors:

    U.S. Geological Survey

    F Street Between 18th and 19th Street, NW
    Washington, DC    20244

    Pennsylvania Department of Transportation

    P.O. Box 2926
    Harrisburg, PA  United States  17120
  • Authors:
    • Reed, L A
  • Publication Date: 1980-4

Media Info

  • Pagination: 53 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00322706
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA/PA-80/68 Final Rpt.
  • Contract Numbers: 68-34
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Mar 12 1981 12:00AM