Village of Scarsdale, New York Brewster Road Watercourse Stream Stabilization
Posted on June 24, 2015
Client: Village of Scarsdale, New York
Location: Village of Scarsdale, New York
Project Type: Brewster Road Watercourse Stream Stabilization
Project Cost: $400,000
- Stream Dredging/de-silting
- Stream Restoration
- Turf Reinforcement Mat
- Erosion Control
- Articulated Concrete Mat
- Floating Debris Removal
- Stormwater Management
- Chemical Storage
- Water Quality
D&B Engineers and Architects, P.C. (D&B) was retained by the Village of Scarsdale, New York to restore and stabilize a stream bank along the Brewster Watercourse west of the Scarsdale High School. The watercourse, which discharges to the Bronx River, was subject to siltation due to stream bank scouring and sediment deposition over the years. The section of stream has a very mild slope of only 0.3 percent but portions of the stream banks have slopes up to 1:1 (horizontal: vertical) which are subject to severe erosion during wet weather events where the velocity through the stream corridor is greater than 8 feet/ sec. The stream corridor is approximately 1,250 feet long.
D&B developed a plan that included stream de-silting to restore the volumetric carrying capacity of the stream channel and turf reinforcement mat (TRM), articulated concrete block and stone rip rap to stabilize the stream bank. A floating boom system was also installed and traps floating materials for collection and removal.
Non-structural controls included the establishment of “no mow” zones along the stream banks to help control run off sediment. Using RUSLE model calculations, the amount of sediment erosion was reduced from 44 tons/year to less than 1 ton per year along this section of the stream corridor. Sediment is the no. 1 pollutant in streams and rivers.
Construction was completed with 0% change orders and on schedule.
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