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No. 2933 approving/authorizing the execution of an addendum to the Master Agency Agreement (Memorial Hospital Streetscape Improvements Project, Bid 3 & 4)
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No. 2933 approving/authorizing the execution of an addendum to the Master Agency Agreement (Memorial Hospital Streetscape Improvements Project, Bid 3 & 4)
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10/18/2012 11:42:50 AM
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a. Utility Designating for the following areas of underground <br />utilities. <br />L Area 1 - Hard surfaced area, up to the curb line, <br />bordered by Navarre Street to the north, Marion Street to <br />the south, Michigan street to the west and the east edge <br />of the parking lot on the east side as depicted in Figure <br />3. The surrounding roadways are not included in the <br />investigation area. <br />ii. Area 2 - Hard surfaced area, up to the curb line, <br />bordered by Main Street to the west and north, Michigan <br />Street to the east and the building and alley limits to the <br />south as identified in Figure 4, the surrounding <br />roadways are not included in the investigation area. <br />iii. Area 3 - Hard surfaced area bordered by Park Lane to <br />the north, Bartlett Street to the south, Main Street to the <br />west and Michigan Street to the ease as depicted in <br />Figure 5. Investigation will include the roadways <br />identified above up to the opposite curb line. <br />iv. Utility designating shall include locating underground <br />gas, water, electric, telephone, Fiber optic cable, cable <br />TV and sanitary sewer consisting of force main only. <br />V. Surface geophysical methods will be utilized to interpret <br />the possible presence of underground utilities and then <br />employ electromagnetic equipment to detect the <br />selected utilities. The sub - consultant will attempt to <br />field locate and mark -out buried, "toneab /e" utilities. <br />Tonable is defined as any utility capable of carrying an <br />electromagnetic signal. Using the aforementioned <br />technology, the sub - consultant will provide paint <br />markings or flags to show the approximate horizontal <br />position of the desired utilities. <br />Vi. Ground Penetrating Radar (GPR) will be used in an <br />attempt to locate any non - metallic (nontoneable) utilities <br />that may be present. GPR is a wave -based form of <br />geophysical investigation in which an electromagnetic <br />wave, launched by a transmitting antenna element, is <br />propagated downward into the ground. A portion of the <br />wave energy is reflected off of subsurface features <br />differing in electrical properties from the surrounding <br />material. The reflected radar energy is detected back at <br />the surface by a receiving antenna and converted to <br />electrical signals, which correspond to minor changes <br />in the voltage. The signals are sent to the control <br />display unit, amplified and a realtimetwo- dimensional <br />depth profile is constructed. The depth profile is <br />analyzed in the Field and features such as subsurface <br />4of11 <br />Supplemental Agreement No. 2 <br />
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