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<br />" <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br /> <br /> <br />Chanfle Order No.2 and No.3 - Retaininfl Wall. Rio Rap. and Preble's Habitat <br /> <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, <br /> <br />Additional cost = $150,100 +$33,939 = $184,039 <br /> <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 lS-inches to 12-inches. <br /> <br />Reduction in cost = $13,770 + $13,775 = ($27,545) <br /> <br />In November of 2000, the U.S, Army C01]JS 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 determined that the project site <br />contained suitable but unoccupied habitat for the Preble's Meadow Jumping Mouse, and that <br />necessary mitigation measure be inco1]Jorated into the project to offset the affects of the <br />construction. <br /> <br />The Section 404 Individual Permit for the project was issued on February 11, 2002, by the <br />Army C01]JS 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, inco1]Jorating high quality Preble's habitat components. To <br />facilitate some potential movement of Preb1es along the Monument Creek waterway during the <br />2002 growth season, the Town of Monument was also required to plant Zone4b, with a shrub/grass <br />mix prior to May 15,2002. <br /> <br />Additional cost = $160,915 <br /> <br />Chanfle Order No.4 - Dredflinfl <br /> <br />The Town of Monument elected to modify the original bid quantity of dredging from 50,000 <br />cubic yards to 75,000 cubic, <br /> <br />Additional cost = $147,500 <br />