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Exhibit B pg 1 of2 <br /> 4orthern <br /> Natural Gas <br /> To: City of Elk River <br /> From: Northern Natural Gas <br /> Subject: Nature's Edge Business Center Phase 2 Date: 9/11/2014 <br /> EATS#49072 <br /> Northern Natural Gas (NNG) Engineering has reviewed the revised construction plans <br /> received September 2nd, 2014 by Hakanson Anderson for the City of Elk River related to <br /> the proposed commercial property development in Sherburne County, Minnesota. <br /> Developer's plans consist of a new bituminous entrance road, grading modifications, and <br /> associated utilities (water, storm sewer, sanitary sewer, etc.)in Pierce County, Wisconsin. <br /> Temporary workspace will be required for contractors to complete their work and will <br /> include new utility crossings and road crossings over NNG's natural gas pipeline within <br /> NNG's 75-fool-wide strip easement. <br /> This proposed project will encroach upon two Northern Natural Gas branch pipeline, the <br /> 12-inch-diameter St. Michael Branch Line (MNB67701), and the 8-inch-diameter St. <br /> Michael Branch Line Loop (MNB67702) in Section 11 Township 32N Range 26W of <br /> Sherburne County,Minnesota. <br /> Northern Natural Gas (NNG) requires that the builder meet the following encroachment <br /> conditions to ensure pipeline integrity and safety during and after construction. Said <br /> encroachment conditions are contained in the NNG engineering standards ES 0065, <br /> "Encroachment Guidelines for Natural Gas Pipelines." <br /> Encroachment Guidelines <br /> • An NNG representative shall be present at all times when excavation work is <br /> being performed within 25 feet of Northern Natural Gas's pipeline. This <br /> requirement is per NNG operating procedure OP 80.102, "Damage Prevention <br /> Program." The contractor shall provide Northern a Minnesota utility one call <br /> ticket with 48 hour notice prior to excavating in the area. <br /> • Mechanical excavation is allowed up to 24 inches from the NNG pipeline. Hand <br /> excavation or hydrovac excavation is required when excavating 24 inches or <br /> closer to NNG's pipeline. <br /> • Permanent Structures: Any enclosed structure or building permanent in nature <br /> regardless of purpose may not be installed inside NNG's easement and should be <br /> installed a minimum of 35 feet from a Northern pipeline. <br /> • Foreign Utilities: All foreign utilities (water, gas, sanitary, sewer, oil, <br /> communication, etc.) must cross Northern's pipelines at or near a right angle with <br />