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Construction of 7.3 miles of Southern Walnut Creek Bike Trail. The trail is aligned close to the Walnut Creek and Boggy Creek channels where ongoing channel instability and erosion could undermine the new trail. CPE designed Walnut Creek and Boggy Creek channel stabilization measures at four locations, emphasizing the use of green channel stabilization measures, rather than traditional “hard” measures, including 520 CY of gabions, 1,800 SY of soil retention blanket, 3,400 SY of geogrids, 2,840 CY of rock riprap, and 220 CY of large limestone blocks.
Identified as public land (approx 16 acres) within the West Bouldin Creek watershed, Doucet provided water quality, erosion control, and low storm intensity flood control to the creek and riparian corridor. The Best Management Practices (BMP) consisted of a channel runoff diversion structure, a sedimentation/extended detention pond, and a downstream level spreader with a ½-acre vegetative filter strip prior to discharging flow back into West Bouldin Creek
Working with the Parks and Recreation Department, Doucet provided engineering services for a previous landfill site bounded by Town Lake to the north, Mopac Expressway to the east, Stratford Drive to the south, and Eanes Creek to the west. Doucet performed the following: Hydrologic & Hydraulic Analysis for the contributing drainage area upstream of the project site Channel Improvements Design to convey runoff using 6” Conlock with vegetation infill and covered with biodegradable soil retention blankets Liner System Design using Geomembrane EPDM Rubber Liner for the new channel Bank Stabilization development using vegetated reinforced soils, vegetation planting, soil retention blanket, rock riprap, limestone blocks and AKWARDRAIN for Eanes Creek.
