Central Corridor Stormwater and Green Infrastructure Planning Project

Saint Paul, Minnesota

The METRO Green Line (Central Corridor) operates along an 11-mile corridor connecting the downtowns of Saint Paul and Minneapolis. The Green Line is expected to spur redevelopment along the corridor. Previous City-led planning efforts highlighted transit-oriented development (TOD), creation of new parks and open spaces, and the use of green infrastructure as primary redevelopment goals for the corridor.

Currently, stormwater is required to be treated on an individual parcel basis. Since 2011, 84 percent of redevelopment sites along the Green Line requiring stormwater management have placed stormwater below ground, resulting in a lost opportunity to use stormwater as an amenity to promote a sustainable and vibrant community.

The SRF team performed both policy and technical evaluations to determine whether stormwater management along the Green Line could support TOD and developed the stormwater management concept of shared, staked-function green infrastructure – a system in which stormwater generated from multiple parcels is jointly treated in shared green infrastructure. The green infrastructure is located and designed to provide economic, environmental and social (triple bottom line) benefits to the community beyond treating stormwater; this is referred to as stacked-function. Other project goals included incorporating public art and developing a replicable tool for other developing transit corridors within the metropolitan area.


  • American Society of Landscape Architects – Minnesota Chapter (ASLA-MN) 2014 Analysis and Planning Honor Award

CLIENT:  City of St. Paul