6.1. SR 06-16-2003 - Laserfiche WebLink

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Howard R, Green Qompany May 21, 2003 File: 820450J-0240 Mr. Chris Leeseberg City of Elk River 13065 Orono Parkway Elk River, MN 55330 RE: KINGDOM ESTATES ADDITION Dear Mr. Leeseberg: As requested, we have reviewed the preliminary plat and other submittals regarding the Kingdom Estates Addition in northern Elk River. As you are aware, this is in the rural section of Elk River, adjacent to and north of County Road 33. Based on our review and comments received at the staff review meeting, we would offer the following comments: In our letter dated March 19, 2003, we recommended that the plat not move forward for two reasons: it had neither gone to the Technical Evaluation Panel (TEP) nor had drainage calculations been submitted or reviewed. The project has now been presented to the TEP and approved. The comments of the TEP are summarized in a May 14, 2003 memo from Rebecca Haug, Environmental Technician. The drainage calculations have been submitted, reviewed and revised. There are still a couple of minor issues that need more definition. These include the following items: · There is a detail of the 4' weir detail shown on the plan sheet, but there is no detail showing the pond outlets that are using 15" CSP as an outlet culvert. Will these outlets have an emergency overflow, and will it be propedy protected against erosion? · The weir detail should be revised to show the riprap placed across the top of the entire weir. · A drainage swale should be shown in the proposed contours from Apron 106 down to the detention pond for Post 41. · Storm sewer manholes should have a 0.10' drop from inlet pipe invert to outlet pipe invert. · It appears the drainage areas shown on the catch basin calculations do not correspond to the amount of area draining to each of the intakes. (Example: Post 53 is 0.89 acres, all of which drains to the street. CB 101 and CB 102 collect this runoff. Their drainage areas are shown as 0.3 acres each, or a total of 0.6 acres.) The other intakes have similar situations as well. The preliminary plat consists of seven lots, six of which are relatively similar in size and one of which that consists of the northern approximately 48 acres of the site. Lot 6 and 7 each contain, existing homes, with Lot 7 having auxiliary buildings also. There is a small 0.2-acre parcel cut out near the intersection with County Road 33. This piece of property is unlabeled. We anticipate that this is an outlot to be connected to the Ltr--052103-Leeseberg 1326 Energy Park Drive · St. Paul, MN 55108 · 651/644-4389 fax 651/644-9446 toll free 888/368-4389