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<br />" <br /> <br />e <br /> <br />e <br /> <br />Table 3.2 <br />DEPTH OF COVER FOR WATER LINES <br /> <br />SIZE OF LINE DEPTH OF COVER. <br /> TOP-OF-CURB OPEN-DITCH <br />8-INCH & SMALLER 4 FEET I 5 FEET below ultimate flowline <br />12-INCH & LARGER 5 FEET I 5 FEET below ultimate flowline <br /> <br />.When crossing easements whose owning or governing agenc.y has stricter depth of cover criteria than that <br />shown in Table 3.2, the stricter of the two shall apply. Where other agencies have review authority or <br />jurisdiction and have different depth of cover requirements, the stricter of the two shall apply. <br /> <br />E. Appurtenances <br /> <br />1. Do not place appurtenances in pavement when the appurtenance would be <br />covered in whole or in part by pavement. Gate valves may be placed in <br />sidewalks or paved roadways provided that the top of the valve box is flush with <br />the finished pavement. <br />2. All water system valves shall conform with A WW A standards and shall include: <br /> <br />a. Cast iron valve boxes are required on all valves less than 12 inches. <br />Valve vaults are required on all valves 16 inches and larger. <br />b. All valves shall be sized to equal the size of the water main on which it <br />is located. <br /> <br />3. Valves <br /> <br />a. <br /> <br />Spacing - set at maximum distances along the water line as follows: <br /> <br /> (1) <br /> (2) <br /> (3) <br /> (4) <br />b. Location <br /> (I) <br /> <br />8" & Smaller - 1000 feet <br />12" & Larger - 2000 feet <br />The total number of valves at any water line intersection shall <br />equal the total number of Jines leading out from the <br />intersection point minus one. <br />Tapping Sleeve & Valve - Sleeve and bolts shall be stainless <br />steel. <br /> <br />(2) <br /> <br />Normally, locate valves at street intersections along the street <br />right-of-way lines projected across the water line where <br />possible. Tapping sleeve and valves are excluded from this <br />requirement. <br />Isolate fire hydrants and flushing valves from the service main <br />with a valve located in the fire hydrant or flushing valve <br />branch. This valve should not be located in the slope or <br />flowline of roadside ditches. <br />Intermediate valves, not located on the projection of the right- <br />of-way line, shall be located on the water line 5 feet from a <br />tire hydrant but shall not be set in a driveway. <br />Locate valves a minimum of 10 feet horizontally away (either <br />direction) from any sanitary sewer crossing. <br />Valves located near reducers shall be located on the smaller <br />diameter pipe. <br />All water mains shall be valved within the street right-of-way. <br /> <br />(3) <br /> <br />(4) <br />(5) <br />(6) <br /> <br />January 2004 <br /> <br />Water System Design Criteria Page S or 13 <br />