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City of Elk River Design Standards <br />where using approved connectors. No looping or coiling of wire is <br />allowed. <br />c. Any damage occurring during installation of the trace wire must be <br />immediately repaired by removing the damaged wire, and installing a new <br />section of wire with approved connectors. Taping and/or spray coating <br />shall not be allowed. <br />d. Trace wire must be properly grounded as specified. <br />e. Trace wire on all service laterals/stubs must terminate at an approved <br />trace wire access box located directly above the utility, at the edge of the <br />road right-of-way, but out of the roadway. (See Trace wire <br />Termination/Access) <br />f. At all mainline dead -ends, trace wire shall go to ground using an <br />approved connection to a drive-in magnesium grounding anode rod, <br />buried at the same depth as the trace wire. (See Grounding) <br />g. Mainline trace wire shall not be connected to existing conductive pipes. <br />Treat as a mainline dead- end, ground using an approved waterproof <br />connection to a grounding anode buried at the same depth as the trace <br />wire. <br />h. All service lateral trace wires shall be a single wire, connected to the <br />mainline trace wire using a mainline to lateral lug connector, installed <br />without cutting/splicing the mainline trace wire. <br />i. In occurrences where an existing trace wire is encountered on an existing <br />utility that is being extended or tied into, the new trace wire and existing <br />trace wire shall be connected using approved splice connectors, and shall <br />be properly grounded at the splice location as specified. <br />J. A mainline trace wire must be installed, with all service lateral trace wires <br />properly connected to the mainline trace wire, to ensure full <br />tracing/locating capabilities from a single connection point. <br />k. Lay mainline trace wire continuously, by-passing around the outside of <br />valves and fittings on the North or East side. <br />1. Trace wire on all water service laterals must terminate at an approved <br />trace wire access box color coded blue and located directly above the <br />service lateral at the edge of road right of way. <br />m. All conductive and non-conductive service lines shall include tracer wire. <br />E. Testing <br />a. All new trace wire installations shall be located using typical low frequency (512Hz) <br />line tracing equipment. This verification shall be performed prior to final acceptance <br />of the project. <br />b. Continuity testing in lieu of actual line tracing shall not be accepted. <br />Testing <br />Hydrostatic Testing of Pressure Pipe <br />Each section of watermain that can be isolated by valving shall be subjected to a separate two- <br />hour pressure test. Testing for the two-hour duration for watermain shall be with hydrants <br />closed, and valves on hydrant leads and dead-end lines open for watermain. When service lines <br />have stubs extending beyond the curb stops or valves, the curb stops or valves shall be in the <br />open position and the pressure test conducted against the capped extension. Once this portion <br />of the test is completed, the valve on the hydrant leads and dead-end water lines shall be closed <br />and hydrants opened. The specified test pressure shall be applied, and the test repeated for 15 <br />minutes to establish the condition of the hydrant lead valves. <br />© City of Elk River, Minnesota — All rights reserved 16 <br />