1976-04-05 Regular Meeting - Laserfiche WebLink

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BUSCH, HUTCHISON & ASSOCIATES, INC. CONSULTING ENOINEERS 1107 rLEETWOOO DRIVE - BAYTOWN, TEXAS 77520 PHONE (71-) 422.0213 0 March 19, 1976 Honorable Mayor Pro Tem and City Commission City of La Porte Post Office Box 1115 La Porte, Texas 77571 FINAL ESTIMATE - WATER LINE REPLACEMENT ON FARRINGTON AND COLLINGSWOOD IN FAIRMONT PARK The attached final estimate for the referenced job shows the total cost of the originally scheduled work, one change order, and the required -extra work to be $54,838.17, an overrun of $12,827.00. Of this overrun, $5,945.25 represents the change order issued for extra work at the Farrington -Collings- wood intersection which involved considerable pavement removal and replacement, augered installation of the 12-inch line across Collingswood, and replacement of the sidewalk. The balance of the overrun, $7,715.34, was caused by the extra work required at every street intersection. This extra work and the fittings used came about because the existing system in each case was different when uncovered than that represented on the available drawings. There was also a great deal of congestion because of shallow storm sewers, the old 12-inch line and the proximity of the street and sidewalk. In two cases it was necessary to relocate fire hydrants to make room for the work, and at one point, a branch line was found which was not known to exist, and provisions had to be made to tie it to the new line. At Belfast an additional 54 feet of line was added toward Spencer to avoid congestion and at Collingswood the new line was extended to the South across the street so the old.cast iron line under Collingswood (not known to exist before) was taken out of service. In all, an additional 140 feet of 12-inch line was added: Because of the differences in the existing system and what was thought to exist, it was necessary to add some 6-inch gate valves and one 12-inch valve so that the change over to the new line could be effected ,without cutting off water service for any length of time. If you have further questions concerning this project, I shall be happy to discuss it in greater detail at your convenience: The contractor has completed all of the specified work, and we recommend final payment at this time. J es P. Hutchiso n, P.E. .V' a President JPH/dle