09-28-2005 Council Agenda - Laserfiche WebLink

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level of the pond to prevent erosion problems. The orientation of the outlet should be towards the middle of the pond not towards a pond bank to minimize erosion. As shown it appears that this storm sewer line is outside of the drainage and utility easements being provided. The finished ground elevation should be shown in the profile view of the plans and a drainage and utility easement be granted over the pipe. The width of the easement should be a minimum of twice the maximum depth of the pipe and be centered over the pipe. 3. There is an existing sanitary sewer line along the west side of Lot I that is approximately 11 feet deep. The plat is currently providing a 20 -foot drainage and utility easement on the west side of Lot 1. The sanitary sewer is not centered within the easement currently being granted; therefore additional easement width should be provided to allow for maintenance. Given the 11 -foot depth of the sewer it is our recommendation that the easement be extended to the east a minimum of 11 feet from centerline of the pipe. 4. Hydrant valves should be placed 2'6" from the hydrant. 5. The Mn/DOT storm sewer pipe should be shown in both plan and profile view. Due to the age of the storm sewer pipe the City should require that the storm sewer pipe within the development be replaced with reinforced concrete pipe. This was previously agreed to by the Developer but is not shown in the final plans. The Developer should also provide comment from Mn/DOT as the replacement material and size and document approval from Mn/DOT for the work. 6. The water main must be looped thru the entire development up to water main in Viking Drive. This was also a previous requirement that was agreed to by the Developer but is not shown on the final plans. 7. It appears the elevations of STM CB -18 are inaccurate. The Developer's Engineer should verify all elevations and submit new corrected plans prior to any construction. 8. The City had requested and the Developer had agreed to treat the storm water from Preserve Trail in the west stood water pond. This submittal shows the storm water being directed to the east pond. In working with the Developer on what staff felt was an acceptable wall height east of Preserve Court the high point of Preserve Trail was moved from the intersection of Preserve Court farther to the west. If the City were to require that the original agreement to treat the storm water in the west pond be followed, it would result in the Developer installing longer storm sewer runs at deeper depths to serve Preserve Court. Given that the treatment and ponding requirements for the storm water from Preserve Court would be the same whether directed to the east or west pond, we would recommend that the storm water from Preserve Court be allowed to be directed to the east pond. A benefit of this to the City is less storm sewer to maintain at shallower depths. 9. The existing sewer and water service to the house being removed off of Viking Boulevard should be removed and abandoned at the property line. 10. The Developer has indicated that the Williams /Magellan pipeline will be lowered to allow for construction of Preserve Court. All relocation requirements and plans should be provided to the City for their review and approval as they may relate to the proposed and future improvements within the right -of -way.