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Ms. Katie Larsen <br />05/03/2023 <br />Page 3 <br />Milestones Addition & Lil Explorers Childcare Center Engineering Review <br />8. (5/3/2023) Applicant to provide a bioroll weir at FES-5 for sediment control. <br />9.(5/3/2023) Applicant to provide silt fence around FES-6 until final stabilization <br />has been achieved to minimize risk of sediment loading to City stormwater <br />infrastructure. <br />10.(5/3/2023) Applicant to provide silt fence around infiltration basins until final <br />stabilization has been achieved to maintain infiltration capacity. <br />11. (5/3/2023) Applicant to revise vegetated filter strip pretreatment for the south <br />infiltration basin in accordance with MN Stormwater Manual design standards. <br />This primarily entails providing a strip at least 3-ft wide and with a slope of 2- <br />6% along the impervious areas flowing to the basin. <br />12.(5/3/2023) Applicant to provide a sump on CMBH-5 to provide pretreatment <br />prior to discharge to the north infiltration basin. <br />13. (5/3/2023) Modeled curve numbers of disturbed pervious areas must be <br />revised to account for the effects of soil compaction. Per City and Watershed <br />standards, B soil pervious areas must be revised to have a curve number of <br />74. <br />14.(5/3/2023) Please clarify the drainage areas map. Drainage areas 2.2 is <br />shown but not referenced anywhere else in the SWMP. Additionally, the scale <br />bar on the proposed conditions drainage area map is unclear. <br />15.(5/3/2023) Exfiltration cannot be included in the modeling of the proposed <br />basins in HydroCAD. <br />16.(5/3/2023) The outlet pipe for the north infiltration basin must be updated to <br />reflect the inverts shown in the plans. <br />•Water Supply <br />There is existing 12-inch diameter ductile iron pipe (DIP) water main along Apollo Drive <br />(CSAH 12) and two separate 4-inch diameter DIP water stubs extend to the property. <br />The applicant is proposing to connect into the water main along Apollo Drive (CSAH 12) <br />and extend 8-inch diameter DIP through the site. There are proposed 6-inch diameter <br />DIP service stubs to the childcare property and the future buildings. <br />Comments: <br />1. (5/3/2023) The 8-inch diameter DIP and any fittings or connections to the water <br />main shall conform to City of Lino Lakes Standard Specifications and CEAM <br />standards (current versions). <br />2.(5/3/2023) Applicant shall extend the 8-inch diameter DIP to the right-of-way of <br />Lilac Street. <br />3. (5/3/2023) Applicant to revise the location of the Fire Department Connection <br />(FDC) so that it accessible and not within a fenced in play area. Applicant to verify <br />that a hydrant is within 100 ft of the new FDC location and accessible from the <br />parking lot being installed with the Lil Explorers site improvements. Revisions to the <br />FDC location and hydrant location should be approved by Deputy Director of Public <br />Safety – Fire Division, Dan L’Allier. <br />4.(5/3/2023) Applicant shall connect to existing water main in Apollo Drive (CSAH 12) <br />via a wet tap. <br />5. (5/3/2023) Applicant to revise location of the curb stop. The curb stop shall be in an <br />area that is accessible to City Public Works staff and shall be within an easement <br />that is contiguous with the easement over the 8-inch diameter water main (see <br />comment 1 under the Drainage and Utility Easements section).