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Total Maximum Daily Load Development for Big Wateree Creek: Station CW-072 Fecal Coliform Bacteria
South Carolina Department of Health and Environmental Control, Bureau of Water
South Carolina Department of Health and Environmental Control, Bureau of Water
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Abstract
Big Wateree Creek, in Fairfield County, SC, meets the Catawba River and forms the Wateree River at head of Lake Wateree. The creek at water quality monitoring station CW-072 (Big Wateree Creek at US-21 south of Great Falls) has been placed on South Carolina’s 303(d) list of impaired waters for violations of the fecal coliform standard. During the assessment period for the 2002 303(d) list (1996-2000), 29 % of samples violated the standard. The watershed of Big Wateree Creek has been mostly rural and agricultural. At the time the NLCD land use data was collected (early 1990’s) the watershed was 77 % forest, 15 % transitional, 3.5 % pasture/hay, and 3.5 % cropland. There is one point source in the watershed, the White Oak Conference Center (SC0035980). The watershed is sparsely populated with only 352 people counted in the 2000 census. The probable sources of fecal coliform bacteria in the creek are runoff from agricultural activities, cattle-in-streams, and failing septic systems. The load-duration curve methodology was used to calculate the existing load and the TMDL load for Big Wateree Creek at CW-072. The existing load was estimated to be 2.1E+12 cfu/day. The TMDL load was determined to be 4.37E+11 cfu/day, consisting of the Waste Load Allocation of 7.48E+08 and the Load Allocation of 4.14E+11 cfu/day and margin of safety of 2.2E+10 cfu/day. In order to reach the target load, a reduction in the existing load to the creek of 80 % will be necessary. Several TMDL implementation strategies to bring about these reductions are suggested.
Issue Date
2/2/2004
Keywords
Water--Pollution--Total maximum daily load--South Carolina, Bacterial pollution of water--South Carolina, Water--Monitoring--South Carolina, Water--South Carolina--Analysis, Water quality--South Carolina
Type
Document
Rights
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