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• 5 All driveways within city-owned- - <br /> ( ) y ty owned street rights-of-way shall be paved with reinforced concrete. <br /> Where a new driveway ties into an existing street curb and the vertical portion of the curb is to <br /> be removed, it shall be saw cut, not broken. When the curb is saw cut, the driveway shall <br /> provide a smooth transition from the gutter line or an optional one-inch lip at the gutter line, <br /> and shall be sloped towards the street with a minimum six-inch fall to the bottom of the street <br /> gutter. There shall be expansion joints placed at the right of way/property line and also at the <br /> utility easement/property line. No concrete, asphalt or other material shall be placed in the <br /> curb gutter to access a driveway. <br /> (6) No valley gutters or swaled pavements shall be permitted at street intersections except on local <br /> streets as defined by the master street plan, and only then due to topographical conditions and <br /> when the contributing drainage area across the intersection is less than 0.50 acre.All approved <br /> valley gutters shall be reinforced concrete pavement not less than six inches thick. <br /> (7) Curb inlets shall be designed to adequately accommodate the design storm volume of flow in <br /> the gutter and shall have a throat inlet capacity of 1.5 times the design gutter flow. Curb inlets <br /> shall be spaced so that at no point shall the gutter ponding between inlets be greater than half <br /> the width of the outer lane of the street. Maximum inlet spacing shall be 500 feet beginning at <br /> changes in the direction of the flow in the street gutter. <br /> (8) Breaks in the curb with concrete aprons curb cuts may be allowed in lieu of inlets where the <br /> discharge does not exceed four cubic feet per second (CFS) and where the discharge flows <br /> directly into an existing drainage facility. Erosion control structures such as flumes, concrete <br /> splash pads, etc., shall be provided to adequately control the resulting erosion if the flow <br /> velocity is greater than two CFS. <br /> (9) All streets shall be provided with permanent six inch (6") oncrete curbs with twenty-four inch <br /> (24") integral concrete gutters or standard roll curb and gutters. The subdivider may request a <br /> waiver of this requirement when it can be demonstrated, to the satisfaction of the City <br /> Engineer and Commission,that: <br /> a. The subdivision is in a low density zoning district (inside of city limits) or that the <br /> density of development is consistent with low density residential lot standards (outside of <br /> city limits)and, <br /> b. An alternative street drainage system design is more practical and effective than curbs <br /> and gutters. While relative cost may be a factor in this determination, for the purposes of <br /> this section, "practical" and "effective" shall refer primarily to hydraulic calculations <br /> with respect to desirable storm water run-off and relationship of the street to the <br /> Comprehensive Plan. <br /> The substitution of swales for curbs and gutters on streets wider than twenty four feet (24') <br /> may be approved on a case-by-case basis, if the developer can submit on an overall <br /> development plan with a report, prepared and stamped by a registered professional engineer, <br /> which shows that the use of open swales and oversized lots will result in a decrease in the <br /> amount and peak rate of storm water run-off compared to development using standard <br /> minimum requirements. <br /> • <br /> (d) Easements. <br /> - 177 - Batesville Subdivision Regulations <br />