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Home My WebLink AboutC2005-664 - 12/13/2005 - Approved CHANGE ORDER Department of Engineering Services City of Corpus Christi, Texas CHANGE ORDER NO~ PROJECT NO: 7302 CONTRACT TIME: 360 C.D. Operating Department: Wastewater Department DATE: November 14,2005 Name of Project: Antelope & Salt Flats Area 36"/48" Wastewater Gravity Line Contractor: Jalco, Inc. CHANGE ADD DEDUCT Add the following bid items to the contract: A 122. Carlisle Street Bore Modifications ] L.S. @ $203, ) 24.55/L.S. $ 203,124.55 A 123. Lexington Street Waterline ) L.S. @ $45,646.00/L.S. 45.646.00 Total Add $248,770.55 Why was this change necessary? (If left off the plans and specifications, explain why) See attached. How can similar changes be avoided in the future? See attached. <\. CONTRACT PRICE............................................................... $ B. TOTAL CHANGE ORDER (inc. current) ........................... $ C. NEW CONTRACT PRICE .................................................... $ D. THIS CHANGE ORDER ....................................................... $ E. PERCENT TOTAL CHANGE (B/A).................................... F. PREVIOUS ADDN'L TIME AUTHORIZED...................... G. ADDN'L CONTRACT TIME THIS CHANGE ORDER.... H. TOTAL ADDITIONAL TIME .............................................. CITY OF CORPUS CHRISTI, TEXAS By: -J~R ~ ...,/~ ;rr I City Engineer 8.614.720.50 630.232.03 9.244.'1.aS3 ~ --"""~ 248.770.55 ...(-;'~.A:.... 7.32% ~ect Engineer 60 C.D. 90C.D. 150 C.D. l(lujtJr CONTRACTOR BY'~. ~ Title: P Y&J...J 1J1,. y ... /f: q/V1~erating Department APPROVED: Legal Dep~rtmeQt fY) LWS ~.L~ AU \ HUKiL'- .~,~-~~~~~~~~...~~_L2.1.u.l~ .. ..........--&- ~H\.tTA~~ -- Capital Budget Officer ~ 2005-664 12/13/05 M2005-415 Jalco DEPARTMENT OF ENGINEERING SERVICES CHANGE ORDER SUMMARY SHEET DECEMBER 13, 2005 PROJECT: Antelope Street & Salt Flats Area 36"/48" Wastewater Gravity Interceptor Line - Rebid Project No: 7302 APPROVED: City Council on 4/19/05- Motion No. M2005-119 CONTRACTOR: Jalco, Inc. P. O. Box 27368 Houston, TX 77227 TOTAL CONTRACT AMOUNT .................................. 250/0 Limit Amount...................... ........... ............... ....... Change Order No.1 (10/25/05) .................................. Change Order No.2 (12/06/05) .................................. Change Order NO.3 (12/13/05) .................................. $8,614,720.50 2,153,680.13 357,720.76 23,740.72 248,770.55 Total ......................... .................................................. 630,232.03= 7.32% < 25% H:IHOMMachel'eIGENlW881ewaterl7302\Ch811llll Order No. 3IChange Order Sumnary.doc EXPLANATION OF CHANGE ORDER NO.3 Antelope/Salt Flats Area 36"/48" Wastewater Gravity Interceptor Line (Project No. 7302) Add the following bid items to the contract: . A 122. Carlisle Street Bore Modifications - 1 L.S. @ $203,124.55/L.S. Why was this chanoe necessary? Under another contract, a new wastewater lift station was constructed at the intersections of Resaca and San Rankin streets. Ultimately, this lift station will collect all sewage that currently flows directly into the existing Broadway Wastewater Treatment Plant. For the immediate future, the sewage from the lift station is pumped into the existing plant. However, once a new Broadway Wastewater Treatment Plant is constructed, the sewage from this lift station will flow to the new plant. This will basically eliminate a transition period in which the City would have to simultaneously operate two separate wastewater treatment facilities. The current project is for the construction of a new sanitary sewer trunk system that serves two purposes. The first purpose is to divert sewage that currently flows into the treatment facility so that it flows into the new lift station. The second purpose is to replace an old trunk sewer system that experiences line breaks, cave-ins, high rates of infiltration and excessive maintenance problems. This new trunk system starts at the Resaca/San Rankin intersection and ultimately terminates at Antelope/Palm intersection. Several new lateral systems will also be constructed that tie to the new trunk system. In order to construct this new trunk system, it is necessary to cross under I.H. 37. This crossing is planned for Carlisle/Doss Streets. Carlisle is on the north side of I.H. 37 between Port Avenue and Brownlee Blvd. Doss is on the south side of I.H. 37, also between Port Avenue and Brownlee Blvd. During the design phase of the project, Maverick Engineering, Inc. (M.E.I.) consulted with the Texas Department of Transportation (TxDOT) to obtain information about I.H. 37 and to secure the necessary permits from TxDOT to construct the sewer within the I.H. 37 right-of-way. Unfortunately, it appears that all of the information concerning the roadway construction of I.H. 37 was not supplied to M.E.1. by TxDOT. The crossing of I.H. 37 is by means of boring under the roadway for a distance of 412 feet. The contractor began the bore from Carlisle and had done approximately 90 feet when he encountered an obstacle. The obstacle turned out to be pilings that provide structural support for the roadway in this location. These pilings are located and spaced together so that boring between them is not possible. Therefore, this change order is to cut through the pilings and construct supplementary supports so that the cutting of the pilings will not have an adverse effect on the roadway. This change has been coordinated between M.E.1. and TxDOT so that TxDOT is aware of, and has approved, the change. How can similar chanoes be avoided in the future? It appears that better coordination, exchange of information, knowledge of the construction needs, etc. between various entities could have resulted in this problem being discovered in the design phase of the project. Page 1 of 2 · A 123. Lexington Street Waterline - 1 L.S. @ $45,646.00/L.S. Why was this chanoe necessary? In recent days, the existing waterline on Lexington has experienced breaks that have disrupted service to the Development Services Building. How can similar chanoes be avoided in the future? Unavoidable - At the time of project design, this waterline's poor condition was unknown. Page 2 of 2