MSA was retained by the Village of Lake Delton to provide survey, design, bidding, and construction services for a roughly 2,000-foot stormwater conveyance ravine that serves as a tributary to Dell Creek and Lake Delton. The project addressed severe erosion caused by uphill development, concentrated drainage, and the 2018 flood, which accelerated sediment loss into Dell Creek and increased maintenance costs.

The scope included topographic and boundary surveys, site walkthroughs to document slope stability issues, hydrologic and hydraulic analysis, coordination with private landowners, and securing temporary construction easements. MSA completed WDNR and USACE permitting for environmental, stormwater, and dredging work; and designed stabilization measures such as slope grading, buried riprap, velocity reduction, and sediment trapping practices. The design also incorporated mechanical dredging of the ravine bottom upstream of existing gabion baskets, reconstruction of check dams, and stabilization of several side ravines.

Construction focused on stabilizing failed banks with buried riprap and restoring graded slopes with topsoil and native vegetation, while minimizing impacts to the main channel, designated as Waters of the U.S.. Permanent stabilized access points were built using articulating concrete block mats to allow future maintenance with heavy equipment. Additional work included riprap check dams, gabion basket reconstruction, and native slope seeding for final stabilization.

The project was completed on time and under budget. Riverview Construction, the lowest responsible bidder, utilized specialized equipment to expedite work while minimizing environmental impacts. The final design provides a permanent, environmentally sensitive solution to erosion, reducing sediment transport to Dell Creek and Lake Delton and lowering long-term maintenance costs for the Village.