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RCWD Permit Number 17-031 11. Certificate of Survey dated 1-2-2018 and received 1-9-2018 12. Pre-plat dated 1-2-2018 and received 1-9-2018 13. Environmental Site Assessment dated 4-x-2016 and received 1-25-2018 14. Revised stormwater Calculations, dated 1-3-2018 and received 1-9-2018, containing narrative, drainage maps, HydroCAD report for the 2-year, 10-year, 100-year, and 100-year back to back rainfall events for proposed and existing conditions 15. Revised plan sheet Cl, C2, C3, C4, C5, C6.1 and C6.2, dated 1-2-2018 and received 1-9-2018. 16. Revised plan sheet C4 dated 4-11-2017 and received 4-27-2017, replaces sheet C4 dated and received 4-11-2017. 17. Revised plan set containing sheets, Cl, C2, C3, C4, C5, C6.1 and C6.2, dated and received 04- 11-2017. 18. Soil borings dated 04-27-2016 and received 3-30-2016 19. Revised stormwater Calculations, dated 4-11-2017 and received 4-12-2017, containing narrative, drainage maps, HydroCAD report for the 2-year, 10-year, and 100-year rainfall events for proposed and existing conditions. 20. Stormwater calculation dated and received 4-11-2017 for the back to back 100-year event 21. Permit application, dated and received 04-13-2017. Findings: 1. Description-The proposed project includes the demolition of the existing Lake Johanna Fire Station to make room for a 4-lot single family home development in Arden Hills. The site is approximately 2.83 ±acres and will disturb 1.65±acres. The project will decrease the impervious surface by 0.351 0.533±acres, from 0.853± acres to 0.502 0.32±acres, effectively reducing the volume entering the adjacent wetland. The project drains to a large 1.1 ± acre land-locked wetland located on site that has no outflow, but is located in the Lake Johanna Resource of Concern. The applicant has submitted a$1,100$250 application fee, which corresponds to les,, than 1 acre of new/redeveloped impervious surface single family residential projects and less than 2.5 acres of land disturbance. 2. Stormwater- Per Rule C.2(g), the Water Quality requirements of Rule C.6 do not apply to single family residential subdivisions that create 7 lots or fewer and do not establish a new public roadway or a private driveway serving 3 or more lots. amw _ lsigtvIoTiSkiiTxstit a- ome m as . To East Wetland 0. 0 0.0 0.0 0.0 0.0 0. 0 landlocked, no outflow) The project is located within the Flood Management Zone; however, the project drains to a landlocked basin which has no outflow, thus the rate control standards of Rule C.7 have been met. In addition, since there is a decrease in the amount of impervious surface, the volume leading into the wetland is reduced from the existing conditions, thus the project is not expected Rice Creek Watershed District Page 3 of 4 3/27/2018