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City of Elk River Design Standards <br />A drainage pit of a minimum �rolume of one cubic vard shall be constructed around the hydrant <br />base and filled with 3/4 to 1.5- inch drain rock firmly compacted under and around the hy�drant <br />base and to 6 inches above the hvdrant drain hole. The drain rock shall be covered with <br />geote�tile fabric, 6 mil polyethylene, or two layers of tar paper prior to backfilling. Hydrant drain <br />holes shall normally- be left open. Hy�drants located where the groundwater is above the drain <br />hole shall have the oudet factory plugged to ensure proper plug installa�ion. The hydrant shall <br />have a permanent tag attached stating "Pump After Use". The pumper nozzle shall be factory <br />painted in accordance with the Ciry standard to identify the hydrant as having a plugged drain <br />hole and needing to be pumped out after use. <br />New hydrants shall ha�re hydrant locating devices and flags. <br />Valves shall have a piece of geotextile fabric, 4 feet by 4 feet, placed centered over the valve <br />body�, prior to installing the bottom section of the valve box, to prevent soil migration into the <br />val�-e bo� assembly. The �-alve box shall be centered over the operating nut of the valve, <br />installed plumb, and the box cover set to finish grade in accordance with the pavement <br />requirements. Val�re boxes shall be installed so as to not transmit shock or stress to the valve. <br />The Contractor shall take extra care in backfilling and compacting around the valve box <br />assembly to ensure plumbness and ease of keying the valve upon final installation. <br />Valve boxes installed independent of a hydrant outside the paved roadway shall be marked with a <br />4-foot-high signpost with a 4 x 8-inch reflectorized marker with a GV labeling on it The marker <br />post shall be installed two feet back of and facing the valve box, to allow operation of the valve <br />wrench without hit�ing the marker post. <br />All dead-end lines shall be terminated with a plug or cap and restrained, rodded, or thrust <br />blocked. If the pipe size is reduced near the end of the line, restraints shall be sized for the pipe <br />size prior to the reduction. A 4-inch x 4-inch x 6-foot wood post marker shall be installed at the <br />end of the line. The marker shall be installed with 4 feet buried in the ground and 2 feet exposed <br />abo�re the ground. <br />4. Tracer Wire <br />Tracer Wire Requirements: Tracer wires shall be installed along all nonmetal mainline pipe runs <br />and all senices unless noted othenvise. <br />A. Connectors <br />a. All mainline tracer wires must be interconnected in intersections, at mainline tees and <br />ma�nline crosses. At tees, the three wires shall be joined using a single 3-way lockable <br />connector. At crosses, the four wires shall be joined using a 4-way connector. Use of <br />two 3-way connectors with a short jumper wire between them is an acceptable <br />alternative. <br />b. Direct bury wire connectors — shall include 3-way� lockable connectors and mainline <br />to lateral lug connectors specifically manufactured for use in underground trace wire <br />installation. Connectors shall be dielectric silicon filled to seal out moisture and <br />corrosion, and shall be installed in a manner so as to pre�rent any uninsulated wire <br />exposure. <br />c. Non-locking friction fit, twist on or taped connectors are prohibited. <br />B. Termination/Access <br />a. All trace wire termination points must utilize an appro�red trace wire access box <br />(aboveground access box or grade level/in-ground access box as applicable), <br />specifically manufactured for this purpose. <br />b. All grade level/in-ground access bo�es shall be appropriately identified with "sewer" <br />OO City of Elk River, Minnesota — All rights reserved I 5 <br />