Coleman CreekLocation:
Coleman Creek is a cool water creek located in Nashville, AR. Importance: Eroding stream banks were causing a loss of property as well as polluting the stream with gravel, excess nutrients, and fine sediments. The Project: Bank 1 (Upstream Bank): The Natural State Streams Team stabilized approximately 150 feet of eroding stream bank by laying the bank back at a 2.5 horizontal to 1 vertical slope. The toe of the bank was stabilized with healthy vegetation and was left in place. All finished grades were seeded with a mix of temporary cover vegetation and permanent deep-rooted grasses, mulched, and covered with jute mesh erosion control fabric. Spoil from the excavation of the bank was transported to another stream bank onsite and used as backfill. 30 containerized hardwood trees were planted in two rows at a 12 foot by 12 foot spacing along the top of bank to provide shade and rooting density to promote long-term stability of the site. Bank 2 (Middle Bank):
The Natural State Streams Team stabilized approximately 250 feet of eroding stream bank by building the bank out to increase the radius of curvature in the bend and by hardening the toe of the bank with a 4 foot thick layer of 12 inch to 36 inch quarried rock. The new bank was keyed into the existing bank on the downstream and upstream end at areas identified in the field where the bank was currently stable with heathy vegetation. Rock was placed at the toe of the new bank at a depth of 3 feet from the bottom of the stream bed and extended at a 2 horizontal to 1 vertical slope from the channel bed up to 4 foot vertically from the bed. Several large trees were harvested onsite and incorporated into the rock structure to enhance in-stream fish habitat. The area behind the rock stabilization was filled with river gravel and soil from onsite. Above the rock structure, the bank will be sloped back to a 2.5 horizontal to 1 vertical slope up to existing grade. The finished grade above the rock stabilization was seeded with a mix of temporary cover vegetation and permanent deep-rooted grasses, mulched, and covered with woven coir erosion control fabric in a ‘soil lift.’ The soil lift enhances stability of the soil by completely wrapping the newly-placed soil in durable but biodegradable woven fabric, which is tucked in on all sides to reduce the chances of fabric and soil loss during high water events. 32 containerized hardwood trees were planted in two rows at a 12 foot by 12 foot spacing along the top of bank to provide shade and rooting density to promote long-term stability of the site. Bank 3 (Downstream Bank)
The Natural State Streams Team stabilized approximately 190 feet of eroding stream bank by building the bank out to increase the radius of curvature in the bend and by hardening the toe of the bank with a 4 foot thick layer of 12 inch to 36 inch quarried rock. The new bank was keyed into the existing bank on the downstream and upstream end at areas identified in the field where the bank is currently stable with heathy vegetation. Rock was placed at the toe of the new bank at a depth of 3 feet from the bottom of the stream bed and extended at a 2 horizontal to 1 vertical slope from the channel bed up to 4 foot vertically from the bed. Several large trees were harvested onsite and incorporated into the rock structure to enhance in-stream fish habitat. Above the rock structure, the bank was sloped back to a 2.5 horizontal to 1 vertical slope up to existing grade. The finished grade above the rock stabilization was seeded with a mix of temporary cover vegetation and permanent deep-rooted grasses, mulched, and covered with woven coir erosion control fabric in a ‘soil lift.’ 32 containerized hardwood trees will be planted in two rows at a 12 foot by 12 foot spacing along the top of bank to provide shade and rooting density to promote long-term stability of the site. Partners: Private Landowner |
Bank 1Bank 2Bank 3 |