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443 Lafayette Road N. \ MINNESOTA DEPARTMENT OF (651) 284-5005 <br /> St. Paul, Minnesota 55155 J LABOR & INDUSTRY1-800-DIAL-DLI <br /> www.doli.state.mn.us TTY: (651)297-4198 <br /> 411 <br /> November 21, 2008 <br /> RECEIVED <br /> NOV 2 6 2F.1 <br /> Kraus-Anderson Construction Company <br /> 8625 Northeast Rendova Street CITY OF ORONO <br /> P.O. Box 158 <br /> Circle Pines, Minnesota 55014 <br /> Gentlemen/Ladies: <br /> Subject: REQUEST FOR ADDITIONAL INFORMATION Regarding Plumbing at <br /> Orono School Renovations Additions and Enclosures Phase I, 795 North Old Crystal Bay <br /> Road, Orono, Hennepin County, Minnesota, Plan No. 095900 <br /> We are NOT able to grant approval at this time of the plans and specifications submitted for the <br /> above-designated project. The following comments outline the changes and/or additional <br /> information that must be submitted so that we can further evaluate the plans and specifications for <br /> compliance with the standards of this department: <br /> 1. Please provide roof plans which indicate the arrangement of the storm drainage system. Please <br /> indicate the pitch, location, and the area served by each drain. The storm drainage system must <br /> be sized in accordance with Minnesota Rules, part 4715.2710. The following comments pertain <br /> to the design of the storm drainage system: <br /> a. A 4-inch rainwater leader is shown exiting the addition on diagram 1/M202. Please provide <br /> a utility site plan detailing the new storm sewer connection within the property lines, <br /> including pipe size anbd slope. <br /> b. The roof drains shown on diagram 4/M202 appear to discharge 945 square feet of roof area <br /> each and are served by 3 inch horizontal leaders. Since a 3 inch horizontal leader can only <br /> accommodate 822 square feet at a slope of 1/8-inch per foot, each leader appears to be <br /> undersized. <br /> c. We are unable to determine the roof areas served by the three roof drains shown on diagram <br /> 3/M203. <br /> d. The roof drains on diagram 3/M206 appear to discharge 1,350 square feet of roof area each <br /> and are also served by 3-inch horizontal leaders. <br /> e. The four roof drains shown on Sheet M207 appear to discharge 990 square feet of roof area <br /> each and are served by 3-inch horizontal leaders. <br /> This information can be provided to you in alternative formats(Braille,large print or audiotape). <br /> An Equal Opportunity Employer <br />