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<br />Chan1!e Order No.2 and No.3 - Retainin1! Wall, RiTJ Rav, and Preble's Habitat
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<br />Upon relocation of the sanitary sewer line it was determined that an H-pile/concrete
<br />retaining wall, 110- feet in length would need to be constructed, The construction of the retaining
<br />wall was necessary given the steep unstable condition of the adjacent slope next to the east spillway
<br />wall excavation, Additionally, construction of the retaining was would allow the sanitary sewer
<br />line to be adequately backfilled and protected,
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<br />Additional cost = $150,100 +$33,939 = $184,039
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<br />During further examination of spillway chute in the field it was determined by the engineer
<br />that the foundation and other resistance properties were more favorable then anticipated,
<br />Therefore, the rip rap thickness downstream of the spillway chute and the grouted rip rap thickness
<br />within the spillway chute itself could be reduced from 3-feet to 2-feet and the average size of rock
<br />be reduced from 18-inches to 12-inches,
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<br />Reduction in cost = $13,770 + $13,775 = ($27,545)
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<br />In November of 2000, the U.S, Army Corps of Engineers, Albuquerque District (Pueblo
<br />Office), authorized the construction of a new spillway for the dam under Nationwide Permit No, 3,
<br />The filling of the reservoir along the west shore, embankment rehabilitation, outlet works
<br />rehabilitation, and construction of a pedestrian trail did not fall under the guidelines of a Nationwide
<br />Permit and required the issuance of a separate Section 404 Individual Permit. The issuance of a
<br />Individual Permit required that the proposed construction area be field surveyed to see if any
<br />threatened or endangered species habitat were being adversely affected, Upon evaluation of the
<br />proposed construction area by Smith Environmental, it was det=ined that the project site
<br />contained suitable but unoccupied habitat for the Preble's Meadow Jumping Mouse, and that
<br />necessary mitigation measure be incorporated into the project to offset the affects of the
<br />construction,
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<br />The Section 404 Individual Permit for the project was is~d on February 11, 2002, by the
<br />Army Corps of Engineers, The 404 Permit issued required that the Town of Monument offset the
<br />impacts to the existing Preble's habitat through the mitigation of 4,67 acres within the project area,
<br />Additionally, as part of the created habitat component of mitigation, a 60-foot wide travel corridor
<br />was required to be constructed, incorporating high quality Preble's habitat components, To
<br />facilitate some potential movement of Prebles along the Monument Creek waterway during the
<br />2002 growth season, the Town of Monument was also required to plant Zone 4b, with a shrub/grass
<br />mix prior to May 15, 2002,
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<br />Additional cost = $160,915
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<br />Chan1!e Order No.4 - Dred1!in1!
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<br />The Town of Monument elected to modify the original bid quantity of dredging from 50,000
<br />cubic yards to 75,000 cubic,
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<br />Additional cost = $147,500
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