Project Number: CL-3
At their meeting on March 21, 2019, the BCWMC approved the project's feasibility study and chose to implement Option 3 from the study. At their meeting on May 16, 2019, the BCWMC approved the 90% design plans for the project. Construction is expected in early 2020.
After no comments were received during a public hearing on September 19, 2019, the BCWMC officially ordered this project by resolution (see "more information"). The BCWMC also approved an agreement with the City of Minnetonka for the design, construction, and ongoing maintenance of the project.
The estimated total cost of this project including design, construction, and administration is approximately $584,000. The City of Minnetonka will pay $204,000, while the BCWMC will pay the remaining $380,000 which will come from a tax levy on watershed residents.
This project will be constructed in conjunction with the reconstruction of Ridgedale Drive in the City of Minnetonka and will treat runoff from 13.3 acres of developed land that currently flows untreated into Crane Lake. This project will remove an estimated 9 pounds of total phosphorus and 3,500 pounds of total suspended solids from the runoff each year.
The project will consist of construction of a 12,250 cubic-foot underground stormwater storage and pretreatment system, a wet well with a 30 gallon-per-minute (0.7 cubic-feet-per-second) pump, and a series of infiltration basins. The plans also include granular filter media and underdrains as a backup to allow for filtration if the site conditions are not conducive to infiltration. These components will be constructed in a new park just east of Ridgedale Drive and will include educational signage about the treatment system and Crane Lake.