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--jALBERG <br />AWN & <br />lANDSCAPE <br /> , INC.® <br /> <br />11770 JUSTEN CIRCLE · MAPLE GROVE, MINNESOTA 55369 <br />PHONE: (763) 428-3550 · FAX: (763) 428-3419 <br /> EMAIL: info @ talberg-lawn.com <br /> <br />January 3,2002 <br /> <br />To Whom It May Concern: <br /> <br />This letter is in regard to the Mike Jones residence located at 11740 200~ Ave NW. Following a meeting with <br />Michele McPherson (City of Elk River Planning Commition), Frank Kriz (Howard R Green), and myself Jeff <br />Hansen (Talberg Lawn & Landscape, Inc.) I have compiled the following data and I am proposing the <br />following solution to the erosion and slope issue at the above address. <br /> <br />Since the meeting we have had an as-built topographical survey done by John Oliver & Associates to <br />accurately determine the current slops. We also have received an 'As Built' of the septic system and <br />ovedaid it on the survey. I also meet with an erosion control expert on site and had several phone <br />conversations with the Anoka County Soil and Water experts. <br /> <br />After researching this matter with the above people it is my belief that no retaining wall of any size <br />should be required on this hillside. Installing a retaining wall would require that virgin soil be disturbed <br />for installation of the wall and its GEO grid. That would create the potential for increased erosion in <br />these disturbed areas. Other reasons include, NSP will not allow a retaining wall over 4 ft on their <br />easement and that any variation of a wall 4ft or under will not change the over all slope of the hill. <br /> <br />My recommendation for erosion control of this hillside is to first remove as many surface rocks as <br />possible and fill any existing erosion areas, making the surface as smooth as possible. We will then <br />hydro-seed using MNDOT seed mix 5-B (as recommended by Mary Alice with Anoka county soil and <br />water) mixed with a bonding agent designed to adhere the seed to soil on embankments. Then we will <br />cover the entire hillside with a turf reinforcement mat made by North American Green. This mat <br />(SC250) is strong, long lasting, and will protect up to a 1:1 slope from high volumes of water flow. The <br />mat will provide support on the hillside during and after the germination and routing process of the <br />seed. Once developed the grass alone will provide enough support to prevent any erosion on this <br />slope. <br /> <br />As shown on the survey water flow should not be a concern for erosion on this hillside. As far as the <br />flow at the bottom of the hill we will be able to channel the water around the house in a swale with a <br />minimum grade of 1%. <br /> <br />Sincerely, <br /> <br />Jeff Hansen <br />Manager <br /> <br />Your Complete Outdoor Maintenance Contractor <br /> <br /> <br />