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Home My WebLink About7A - CSAH 42 Upgrade Project AGENDA #: PREPARED BY: SUBJECT: 7A LANOL LEICHTY, WATER RESOURCES COORDINATOR CONSIDER APPROVAL OF RESOLUTION 97-XX, APPROVING REGIONAL WATER QUALITY POND CONCEPT AS PART OF THE CSAH 42 UPGRADE PROJECT. MARCH 3, 1997 DATE: INTRODUCTION: The purpose of this agenda item is to consider whether the council supports a regional water quality pond concept as part of the County Road 42 upgrade or a more traditional ponding approach. BACKGROUND: Since 1995, when Scott County first started discussions with the City about the future improvement of County Road 42 between McKenna Road and F emdale Avenue there was talk of constructing one regional water quality pond instead of up to six smaller ponds to handle runoff to meet the Nationwide Urban Runoff Program (NURP) standards. The initial location for a regional pond was north of CSAH 42 on the east side of Pike Lake Trail on the Vierling farm. The reason for this location was two-fold: 1) There is a ravine through the Vierling farm that is eroding causing sediment to be washed into Pike Lake, which is forming a delta in the lake. The pond would help to reduce sediment load to the lake; 2) The bottom of the ravine the Vierling's have a cattle lot on the side of a hill. During rain events cow manure washes off the side hill into the ravine and into Pike Lake. The pond would have helped to clean up the surface water runoff before it entered Pike Lake. The Vierling's were contacted in 1996 by the City about selling some of their land so that a regional pond could be constructed, but there was reluctance on their part. They mentioned that they did not want to take anymore land out of crop production. Given the above scenario and the fact that the MPCA is now requiring corrective action to eliminate pollution, the initial location for the regional pond was abandoned. 162dM~Pgt~oereek Ave. S.E., Prior Lake, Minnesota 553/l2-1714 / Ph. (612) 447-4230 / Fax (612) 447-4245 AN EQUAL OPPORTUNITY EMPLOYER Given the advantages of the regional pond concept, the City sought a second location. This location is north of CSAH 42 and west of Pike Lake Trail, just north of the Wensmann commercial property. This site has several benefits: I) The regional pond could serve the needs of four individual County NURP ponds and two on Wensmann's site, and 2) the regional pond could recover 1.5 acres from the Wensmann commercial site, which would otherwise have been required for ponding purposes, and 3) the regional pond could serve the water quality needs of the Pike Lake Trail improvement. The owners of the property, Gordon Beneke and John Corsbie, were contacted to see if they would sell this land to the City. At this first meeting the owners seemed to be willing participants to this concept. No further contact has been made with these property owners since that October, 1996 meeting. DISCUSSION: The County, City and Watershed have considered the following alternatives to meet the water quality needs for the CSAH 42 improvement project and the benefits for each as follows: Alternative 1 Alternative I would involve constructing four (4) individual NURP ponds along CSAH 42 at localized runoff points to treat the water for quality purposes. This alternative does not reflect a long term planning approach. Alternative 2 Alternative 2 involves eliminating up to six individual NURP ponds and constructing one regional NURP pond to meet the water quality needs for this drainage area. Storm sewer pipe will need to be installed along CSAH 42 to pipe the water to the regional pond. This alternative reflects a long term planning approach. There are numerous advantages of a regional pond design. One is that it can be sized to handle water quality needs for multiple properties. The NURP ponds required for the Wensmann site can be eliminated and the NURP pond needs for the upgrade of Pike Lake Trail will be met by the regional pond. Other advantages are: I) minimized use of developable commercial property for ponding purposes, 2) safety - one pond to protect instead of six, 3) elimination of four CSAH 42 NURP ponds, 4) maintenance costs _ one pond to clean out instead of six, 5) utilization of non- developable land for regional ponding, 6) involves willing sellers, 7) use of non-MUS A property versus MUSA property. 97REGPON.DOC 2 FINANCIAL IMP ACT: ALTERNATIVES: RECOMMENDATION: ACTION REQUIRED: 97REGPON.DOC Land Purchase North of CSAH 42 There is 18.5 acres of land owned by Mr. Beneke and Mr. Corsbie where the regional pond is proposed. Of this 18.5 acres, 2.5 acres is located to the northeast and is separated from the remaining property by a driveway easement to a private residence (see map). The remaining 16 acres consists of2.2 acres of lake and 5.0 acres of wetland leaving approximately 8.8 acres of upland. Staff will negotiate for the purchase of this property and seek Council approval as appropriate. This project will be financed by County reimbursements, Trunk Reserve Funds and storm water fees, which is future revenue. Funding sources are shown on the sheet entitled "Alternative Costs" . Considering construction costs and fees, the regional pond costs approximately $6,300 more than using a traditional multiple ponding system. This financial analysis does not address the fact that the regional pond will treat 54 acres, while the multiple pond system treats only 18.6 acres. This means that the city's cost to treat storm water is $8,481 per acre with the regional pond system as opposed to $18,010 per acre using multiple ponding. In addition the regional pond serves 35 acres of developable land (Wensmann parcel) while the multiple ponds treat only County right-of-way. The alternatives are as follows: 1. Approve Resolution 97-XX approving the regional water quality pond concept as part of the CSAH 42 upgrade project. 2. Table this item for a specific reason. 3. Deny this agenda item for specific reasons. Alternative No.1. Staff recommends that the Council approve Resolution 97-XX approving the regional water quality pond concept and authorize staff to negotiate for the purchase of the land. I d to <Wf;rove Resolution 97-XX. I 3 RESOLUTION 97-XX RESOLUTION APPROVING THE REGIONAL WATER QUALITY POND CONCEPT AS PART OF THE COUNTY ROAD 42 UPGRADE AND AUTHORIZES STAFF TO NEGOTIATE FOR THE ACQUISITION OF LAND FOR A REGIONAL WATER QUALITY POND. MOTION BY: SECONDED BY: WHEREAS, Scott County proposes to upgrade CSAH 42 from Ferndale Ave. to Mckenna Rd. to a four lane highway, including storm sewer, and WHEREAS, The Nationwide Urban Runoff Program (NURP) requires treatment of storm water runoff prior to discharge to public waters, and WHEREAS, Scott County, The City of Prior Lake, and the Prior Lake/Spring Lake Watershed District have agreed that the best method of treating the storm water runoff to meet NURP requirements is through the construction of a regional water quality pond. NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF PRIOR LAKE, MINNESOTA, that 1. The Council will approve the concept of a regional pond as part of the CSAH 42 upgrade project. 2. The Council authorizes staff to negotiate with the property owners of the land where the pond is proposed. Staff will obtain final approval from Council prior to the final signing for acquisition of this property. Passed and adopted this 3rd day of March, 1997. YES NO Andren Andren Greenfield Greenfield - Kedrowski Kedrowski - Mader Mader Schenck Schenck Frank Boyles City Manager City of Prior Lake 97REGPON.DOC 5 ALTERNATIVE COSTS COST SUMMARY CSAH 42 WATER QUALITY PONDING ALTERNATIVES ALTERNATIVE #1 - NO REGIONAL POND - (TREATS 18.6 ACRES OF LAND AREA) PRIOR LAKE ESTIMATED COST SHARE (STORM SEWER) CITY COST SHARE FOR 2 NURP PONDS ON VIERLING PROPERTY (1/2 OF $76,400) TOTAL DIRECT COST $296,814.19 $38,200.00 $335,014.19 INDIRECT COST OF ALTERNATIVE #1 - (LAND LOST TO PONDING EASEMENTS = 7 ACRES) SEWER & WATER TRUNK FEES 7 ACRES x $3,500.00 = STORM WATER FEES 7 ACRES x 43,560 s.f.IAC x $0.203 = PIKE LAKE TRAIL NURP POND CONSTRUCTION COST TOTAL INDIRECT COST $24,500.00 $62,000.00 $30,000.00 $116,500.00 TOTAL COST = $451,514.19 ALTERNATIVE #2 - REGIONAL POND - (TREATS 54 ACRES OF LAND AREA) PRIOR LAKE ESTIMATED COST SHARE (STORM SEWER) INCREASED STORM SEWER COST FOR REGIONAL POND COUNTY REIMBURSEMENT FOR TWO NURP PONDS ESTIMATED LAND ACQUISITION COST FOR REGIONAL POND POND CONSTRUCTION COST $296,814.19 $18,600.00 ($74,600.00) $103,000.00 $114,000.00 TOTAL COST = $457,814.19 DIFFERENCE = $6,300.00 PONDS INCLUDE: TWO ASSOCIATED WITH THE WENSMANN DEVELOPMENT AND ONE WITH THE PIKE LAKE TRAIL IMPROVEMENT. 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