8.C.1. PRSR 09 08 2004 - Laserfiche WebLink

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Rain Garden Assessment Page 2 3. The design should allow for infiltration of stored runoff within 48 hours to avoid mosquito breeding. 4. Long term maintenance needs to be investigated. How will accumulated silt be removed? 5. Compatibility with recreational use needs to be assessed for each location. In some cases, walking paths may need to be incorporated into the design. Barriers such as wood rail fencing may be advisable in some locations. 6. The size and shape of each of the proposed rain gardens is approximate but is based on measurements of available space at each site. In all cases, it is planned that excavation will be done so as to minimize impacts to tree root systems. Funding: The Elk River Watershed Association through a Section 319 grant can provide funding for innovative storm water treatment such as rain gardens and associated buffer/filter strips. Cost share is up to a maximum of 75% of total project cost. The cooperator's share can consist of in-kind goods and services. Volunteers may be used to plant vegetation, which can go toward the cooperators 25%. Funded projects must be completed by September 30, 2006. Projects must be maintained for 10 years. 8. Signage: For projects funded through the 319 Grant, we require that a sign identifying the practice as a water quality improvement project be placed at the site. The Elk River Watershed Association can provide an appropriate sign. We can also provide a literature box with fact sheets explaining the purpose of the practice. 9. The SWCD proposes that the city engineer would do design work including calculations for drainage area, pond dimensions, inlet and outlet design etc. The SWCD would plan for the plant materials part of the project.