02/09/2004 Council Packet - Laserfiche WebLink

Home Search

Circle -Lex VFW Post 6583 Page 4 February 3, 2004 City of Lino Lakes, Minnesota 2. Comments regarding the drainage calculations were provided in the January 15, 2003 memo. Revised calculations must be submitted and address the following specific items as previously identified: • Per the drainage diagram and calculations submitted, Subcatchments 2 and 3 (S2 and S3) were shown routing to Pond 1 (P1). However, per the utility plan, S2 discharges directly to the storm sewer rather than to the pond. In addition, Subcatchment 1 (S1) was shown discharging to a Pond 2 (P2), although no Pond 2 exists on the grading plan. In addition, the HydroCad model utilized a 6 -inch outlet whereas no outlet of such is shown on the utility plan. It should also be noted that no ponding is allowed within the County right -of -way. The calculations must be corrected and re- submitted. • The 2, 10, and 100 year proposed discharge rates may not exceed the 2, 10, and 100 -year existing discharge rates. If the orifice on the outlet is at the minimum 6 -inch size, the City shall review and determine if the proposed discharge rate is acceptable. Further review shall be conducted upon the receiving of revised calculations showing the corrected discharge rates. • A 10 -foot wide 10:1 bench is typically required at the normal water level for stormwater ponds. 3. Notes regarding seeding, mulching and turf establishment shall be provided and refer to the appropriate Mn/DOT Specification for turf establishment (2575) and for the seed mixture. The City of Lino Lakes has a specific seed specification for ponding areas and a note referring to City of Lino Lakes seeding specifications is provided on the plan. However, it is recommended that the actual specification and mix be included on the plans or detail sheet. 4. All grading shall be confined to the property, and a note has been added to the plans stating this. In addition, an existing retaining wall is located at the east property line. The applicant has stated that the retaining wall will be left in place and left undisturbed. If not, the Grading Plan must address this accordingly. 5. The Grading Plan suggests that at least some portions of the parking lot and driveways will drain directly to the neighboring streets (Lake Drive and Lois Lane). Additional spot elevations at the driveway entrances should be shown to verify the intended drainage patterns. 6. As previously stated, provisions for existing wells and septic systems shall be addressed on the Grading Plan in accordance with City and State of Minnesota requirements. Utility Plan (Sheet U1): The following comments can be made with regards to the Utility Plan: 1. Sanitary sewer and water currently exist in Lake Drive (12 -inch diameter water and 21 -inch diameter sanitary sewer). The Plans propose utilizing existing services to these mains. The size and condition of