389060 - Multiple Benefits of District-Level Stormwater Systems: From Planning to Construction
Tuesday, June 5
2:00 PM - 3:30 PM
Location: Mirage Room
Mississippi Watershed Management Organization
The Mississippi Watershed Management Organization (MWMO), in conjunction with public and private stakeholders, coordinated planning, design, and construction of the Towerside District Stormwater System in a rapidly-redeveloping neighborhood of Minneapolis, Minnesota. The first phase, serving 8 acres of brownfield redevelopment, went online in 2016.
MWMO’s objective was to build an integrated district stormwater system with added public greenspace to meet local stormwater requirements at a cost equal to or less than the cost to meet local requirements on each parcel individually. Through careful planning and stakeholder engagement this objective was met, achieving 15% cost savings to meet requirements, which was used to fund infrastructure for stormwater reuse to provide irrigation to private developments, community garden, and city-owned boulevard plantings.
The planning, design, construction, and multi-party contractual process took over 3 years, beginning with early high-level concepts that demonstrated the potential cost-benefits of a district system, proving the possibility of encouraging private development, ending with final design coordinated with multiple public, utility, and private development construction projects. The project included four primary components: conveyance between private property, treatment in filtration basins, underground storage, and stormwater reuse system for irrigation of the private developments, all layered within an artful stormwater park.
MWMO and project partners are designing the expansion of Towerside District Stormwater System to treat stormwater from 20 additional acres of future development and provide a series of interconnected stormwater parks.
This presentation will highlight the data analysis, design, engineering, public/private partnership, and contractual components to assure longevity of the facility.