Water: Nonpoint Source Success Stories
North Carolina: Little Ivy Creek
Partners Reduce Polluted Runoff from Agricultural Areas
Waterbody ImprovedRunoff carrying sediment from agricultural areas impaired aquatic habitat in North Carolina's Little Ivy Creek. North Carolina added the creek to its 2002 Clean Water Act (CWA) section 303(d) list of impaired waters. Using CWA section 319 and state funding, Madison County Soil and Water Conservation District installed best management practices (BMPs) including livestock exclusion fencing, alternative watering facilities, pastureland management and riparian buffer plantings. Water quality improved, and North Carolina removed a 2.6-mile segment of Little Ivy Creek from its CWA section 303(d) list of impaired waters in 2008.
North Carolina Division
of Water Quality
919-807-6437, ext 357
Madison County Soil
& Water Conservation
Little Ivy Creek, in Madison County, North Carolina, is a subwatershed of the larger Ivy River watershed in the Upper French Broad River Basin. Nonpoint source pollution has plagued the 60,000-acre Ivy River watershed for years. Contaminants include fecal coliform, nutrients and sediment. Biological monitoring on Little Ivy Creek in 2002 showed a score of fair, which failed to support the creek's aquatic life designated use. As a result, North Carolina added Little Ivy Creek to its CWA section 303(d) list for impaired waters in 2002.
Community partners came together to combat the fecal coliform bacteria and sedimentation problems identified by North Carolina Division of Water Quality in the watershed. This multi-project effort focused primarily on installing agricultural BMPs. To date, partners have installed four projects using CWA section 319 funds in the Little Ivy Creek and Ivy River watersheds.
Partners installed more than 48,000 linear feet of livestock exclusion fencing to keep livestock out of the stream and reduce erosion (Figure 1). Project participants also installed 170 alternative watering facilities (Figure 2). One farmer adopted pasture and hay management plans, protecting an additional 530 acres of natural area. Additional BMPs funded by CWA section 319 grants helped develop a farm access road, 30 acres of riparian buffer and 25 feed/waste management structures (Table 1).
Biological monitoring data indicate that water quality in Little Ivy Creek has improved. North Carolina developed the North Carolina Index of Biological Integrity (NCIBI) to assess a stream's biological integrity by examining the structure and health of the fish community. NCIBI incorporates information about species richness and composition, trophic conditions, and fish abundance and condition. The NCIBI effectively summarizes all classes of factors that influence aquatic faunal communities such as water quality, energy source, habitat quality, flow regime and biotic interactions.
The North Carolina Division of Water Quality breaks the Little Ivy Creek watershed into two main segments hosting one macroinvertebrate and one fish sampling station. At the most recent sampling interval in June 2007, segment 6-96-10a received a good rating for fish, and segment 6-96-10b received a good-fair rating for both macroinvertebrate and fish (Table 2). These data indicate marked biological improvement and evidence of macroinvertebrate habitat recovery in Little Ivy Creek. On the basis of these data, the North Carolina Division of Water Quality removed the 2.6-mile segment from the state's CWA section 303(d) list of impaired waters in 2008.
Partners and Funding
Support for this project came from $359,606 in U.S. Environmental Protection Agency CWA section 319 funds and $291,750 in state funds. CWA section 319 grant funds awarded in the larger Ivy River watershed to date totals $1,384,356. Partners include North Carolina Division of Water Quality, North Carolina Division of Soil and Water Conservation, Madison County, University of North Carolina at Asheville, Clean Water Management Trust Fund, North Carolina Department of Transportation, North Carolina Wildlife Resources Commission and the Tennessee Valley Authority, which cumulatively have provided an additional $1,069,855 in matching funds.
|Riparian Buffer Planting||31 ac|
|Livestock Exclusion Fencing||48,500 ft|
|Critical Area Planting||17 ac|
|Feed/Waste Structures||25 unit|
|Rotational Grazing||830 ac|
|Pastureland Management||530 ac|
|Tree Planting||15 ac|
|Stream Restoration||1,500 ft|
|Farm Road Stabilization||1,000 ft|
|Nutrient Waste Management||530 ac|
|Little Ivy Creek||SR 1547||6-96-10||08/03/02||44||Fair|
|Little Ivy Creek||SR 1547||6-96-10||06/18/07||52||Good|