Metropolitan St. Louis Sewer District
Shaw Nature Reserve
Schematic Design through Construction Administration
General Services Contract for On-Call Services through 2021
Much of Saint Louis city is located within the combined sewer overflow (CSO) area, meaning that stormwater from the street is mixed with sanitary sewage. During large rain events, the system becomes overwhelmed, resulting in raw sewage being discharged into the Mississippi River. In 2011, Metropolitan Sewer District (MSD) entered a Consent Decree and will spend a minimum $4.7 billion over the next 23 years to address the issue of overflows and other sewer system improvements.
DTLS and the Shaw Nature Reserve are collaborating under a General Services Agreement for on-call project design and support for MSD to reduce CSO overflows by constructing large neighborhood-scale rain gardens. The design of four rain gardens is currently underway. Each project is intended to capture and store stormwater from the 90th percentile storm events. The planting plans are low maintenance and while promoting biodiversity and aesthetics through innovative modular and community-based planting design approaches.
Each project is intended to be an amenity and educational opportunity for adjacent property and neighborhoods, most of which have deficiencies in high quality landscape and open spaces.