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Robinwood Neighborhood Storm Sewers and Water Quality Swale

Brownsburg

Working in partnership with town officials, the Wessler team identified the Robinwood area of Brownsburg in a Stormwater Conceptual Capital Improvement Plan that ultimately led to a drainage correction in a neighborhood prone to flooding. Heavy silt accumulation and inadequate slopes resulted in poor hydraulic capacity, slow drainage and standing water in this area. Old clay pipes clogged, deteriorated and needed to be replaced. The Wessler team designed a new storm conveyance system to help alleviate drainage problems.

The project included the installation of approximately 6,500 linear feet of 12-inch to 42-inch storm sewer with new manholes, headwalls and catch basins. In addition, regrading of approximately 3,000 linear feet of open ditch improved the flow. Wessler staff were responsible for the study, survey, design, permitting, and construction administration.

Thanks to the level of detail in Wessler’s plans that provided a good understanding of the project, a local contractor made an unexpectedly low bid saving Brownsburg more than $100,000 (25% of the total project cost).

To avoid impacts to an existing waterway that required regrading, the Wessler team worked with the U.S. Army Corps of Engineers, the Indiana Department of Environmental Management (IDEM) and the Hendricks County Soil and Water Conservation District to develop a low impact solution of a water quality swale, which included the planting of wildflowers and other native ground cover along the swale to uptake pollutants. In areas where energy dissipation was needed, a turf reinforcement mat was installed in place of loose stone, which is commonly used at stormwater outfalls.

Wessler facilitated monthly construction progress meetings and communicated regularly with the contractor on behalf of Brownsburg officials to limit the number of project delays.

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William J. Leber, P.E., LEED AP

Stormwater Group Head and Vice President of IT

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