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City of Elk River Design Standards <br />or "water" cast into the cap and be color coded. <br />c. A minimum of 2 ft. of e�cess/slack wire is required in all trace wire access bo�es after <br />meeting final elevation. <br />d. All trace wire access boxes must include a manually interruptible <br />conductive/connecti�re linl� between the terminal(s) for the trace wire connection and <br />the terminal for the grounding anode wire connection. <br />e. Grounding anode wire shall be connected to the identified (or bottom) terminal on <br />all access boxes. <br />£ Service Laterals on public property - Trace wire must terminate at an approved grade <br />level/in- ground trace wire access box, located at the edge of the road right-of-way, <br />and out of the roadway. <br />g. Service Laterals on private property - Trace wire must terminate at an approvedabove- <br />ground trace wire access box, affixed to the building exterior direcdy above where the <br />utiliry enters the building, at an elevation not greater than 5 vertical feet above fu�ished <br />grade, or terminate at an approved grade level/in-ground trace wire access box, located <br />within 2 linear feet of the building being ser�-ed by the utilit�. <br />h. Hydrants — Trace wire must terminate at an approved above-ground trace wire access <br />box, properly affixed to the hydrant grade flange. (affixing with tape or plastic ties <br />shall not be acceptable) <br />i. Long-runs, in excess of 500 linear feet without service laterals or hydrants - Trace <br />wire access must be pro�rided utilizing an approved grade le�rel/in-ground trace wire <br />access box, located at the edge of the road right-of-way, and out of the roadway. The <br />grade level/in-ground trace wire access bo� shall be delineated using a minimum 48" <br />poly�ethylene marker post, color coded per APWA standard for the specific utilitv <br />being marked. <br />C. Grounding <br />a. Trace wire must be properl� grounded at all dead ends/stubs. <br />b. Grounding of trace wire shall be achieved by use of a drive-in magnesium <br />grounding anode rod with a minimum of 20ft of #14 red HDPE insulated copper <br />clad steel wire connected to anode (minimum 0.5 lb.) specifically manufactured for <br />this purpose and buried at the same elevation as the utility. <br />c. When grounding the trace wire at dead ends/stubs, the grounding anode shall <br />be installed in a direction 180 degrees opposite of the tYace wire, at the <br />ma�mum possible distance. <br />d. When grounding the trace wire in areas where the trace wire is continuous and <br />neither the mainline trace wire or the grounding anode wire will be terminated <br />at/above grade, install groundinganode directiv beneath and in-line with the trace <br />wire. Do not coil excess wire from grounding anode. In this installation method, the <br />grounding anode wire shall be trimmed to an appropriate length before connecting <br />to trace wire with a mainline to lateral lug connector. <br />e. Where the anode wire will be connected to a trace wire access box, a <br />minimum of 2 ft. of excess/slack wire is required after meeting final <br />ele�ration. <br />D. Installation <br />a. Trace wire installation shall be performed in such a manner that allows <br />proper access for connection of line tracing equipment, proper locating <br />of wire without loss or deterioration of low frequency� (512Hz) signal for <br />distances in excess of 1,000 linear feet, and without distortion of signal <br />caused by multiple wires being installed in close pro�mity to one <br />another. <br />b. Trace wire systems must be installed as a single continuous wire, except <br />OO City of Elk River, Minnesota — All rights reserved I 6 <br />