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City of Elk River Design Standards <br />20. Cul-de-sac streets shall not exceed 700 feet from the center of the intersection to the center of <br />the cul-de-sac. <br />21. "Ey�ebrow" cul-de-sacs will not be allowed. <br />22. Retaining walls are generally not allowed within the City right-of-way. Retaining walls must be <br />re�riewed and approved by- the City� Engineer and the following: <br />A. Must conform to an engineered design if less than 4 feet in height (e�posed face). <br />B. Must be specifically designed for the site b�� a Licensed Professional Engineer if greater <br />than 4 feet in height. <br />C. Must have fence or railing if greater than 4-feet in height. <br />23. The Cityr will impose a�1,000 maintenance fee for every patch location needed in the base <br />course pavement. No patches are allowed in any wear course pavement. <br />24. All castings (manholes and valve boxes) must be raised to '/z" below the finished asphalt base <br />course elevation before paving of the asphalt base. Any cuts in the new base course pavement to <br />adjust a casting to grade will be subject to the above described �1,000 maintenance fee. <br />Adjustments to meet the final wear course elevation shall be accomplished using glue in steel <br />adjusting rings. <br />25. Street signs, including regulatory and street names, shall be installed in new developments by the <br />de�reloper per CitS- sign standards and the Minnesota 1�lanual of Uniform Traffic Control <br />Devices (1VIMUTCD). Street signs shall match City appro�red street names. "No Outlet" plates <br />shall be installed along with street name signs where appropriate. Sign and post shop drawings <br />shall be supplied to and appro�red by the Street division prior to order or installation. <br />26. Street name sign specifications: <br />A. Street signs shall be E-450 SC/AL flat 0.080 aluminum plate single faced with 3MTM <br />High Intensitv Grade Prismatic Sheeting with screened white on green 6" Highway <br />Gothic Font letters and a'/2" white border. Plates shall be 9" wide by 36" or longer in <br />length. Lettering shall not be all capital. Signs indicating numerical avenues should end in <br />NW and signs indicating named streets should not include the NW. <br />B. Plates shall be center saddle rype. Stacking of street name plates should not exceed 3 <br />plates. <br />C. StYeet sign brackets shall be mounted on a 12-foot long galvanized tubular post, 23/8" <br />outside diameter and a wall thickness of 0.080". Install with an anti-rotation device to a <br />minimum depth of 30". <br />27. No Outlet signs shall be E-450 SC/AL flat 0.080 aluminum plate single faced with 3MTM High <br />Intensit�� Grade Prismatic Sheeting with screened black on y-ellow 6" Highway Gothic Font. The <br />sign shall include a black border with the lettering NO OUTLET and a directional arrow. The <br />No Outlet signs will be placed on the bottom of the street name stack and the stack should not <br />be taller than a 3-plate maxirrium. <br />28. Stop signs (R1-1) shall be 0.080 aluminum plate with 3MTM High Intensity� Grade Prismatic <br />Sheeting, 30" x 30", mounted on an 8-foot long, 3 pound per foot channel post bolted to a 8' <br />long, 3 pound per foot galvanized channel post stub that is driven into the ground a minimum of <br />3 feet. At intersections with street signs and a stop sign, the stop sign shall be mounted on the <br />street signpost. <br />29. Speed limit (30 MPH) signs shall be posted at each entrance residential de�relopments, unless <br />OO City of Elk River, Minnesota — All rights reserved 4 <br />