07-23-2003 Council Agenda - Laserfiche WebLink

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Honorable Chairman and Planning Commission July 9, 2003 Page Two 2. As previously requested, emergency overflow elevations have been shown for all low points and both storm water ponds. However, it appears that the emergency overflow elevation of the west pond would need to be modified to 872 or the outlet structure for the pond be revised. 3. As previously requested the top and bottom wall elevations have been shown for all retaining walls proposed on the site. However, some of the wall elevations seem to be incorrect (Le. lot 3 and lot 6). All wall elevations should be reviewed for accuracy. 4. A note has been provided in the plans indicating that retaining walls over 4 feet will be tiered, However, as depicted on the plans, individual walls are up to 10 feet high. The tiering of the retaining walls will require additional area than necessary for a single wall and should therefore be shown accurately on the plan. 5. A drainage swale is shown along the lot line between Lots 14 & 15 to prevent drainage from Lot 15 discharging onto Lot 14. This drainage swale should be centered on the property line to ensure all drainage is conveyed within the drainage and utility easement provided. Utility Plan 1. The pressure sewage lines from Lots 13, 14, and 15 should discharge into the sanitary sewer mainline not the manhole. 2. Sanitary sewer installed up to a depth of 20 feet can be SDR 35, sanitary sewer between 20 feet and 30 feet deep should be SDR 26, and material specifications should be provided for the sanitary sewer pipe used for depths in excess of 30 feet. The sanitary sewer material pipe should only be changed at manholes and reflect the deepest depth along the run. 3. The hydrant in the southeast corner of Lot 15 can be eliminated. 4. No pavement section has been provided in the plan set. The section along with the soil boring information and R -value determination should be reviewed and approved prior to construction. 5. The storm sewer has been revised to direct the storm water from Preserve Trail to the west pond, as requested by the City, and is being proposed along the south curb line. The retaining wall from station 16 +80 to 18 +10 should be constructed far enough away from the storm sewer line to allow for repair of the line without impacting the wall. 6. All watermain should be moved to the north side of the sanitary sewer. This will allow for repair of the watermain without disruption of the storm sewer and result in shorter water service and hydrant lead lengths, and eliminate the need for insulating the watermain along the retaining wall east of Preserve Trail. The storm sewer line located along the north curb line from CB -15 to STMH 17 should be moved to the south curb line and insulated where adjacent to the retaining wall. C: \windows \TEMP \Itr 07 -09 -03 ping commission.doc