9. Change Order - Upper Zone Water Supply and Storage Project.: City of Ka
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Past wee Pox.? Kalispell, Montana 9 1. Telephone 4 � p o ana � � 99 Iepha�ne ( �b�7�8w��'��, Fax � 06)7S8w783 1
REPORT To: Mayor and City Council
FROM: James C. Hansz, P,E., Director of Public Works
SUBJECT: Change order - Upper zone Water Supply and Storage Project
MEETING DATE: January 7, 2008
BACKGROUND: The 2002 Facility Plan identified major deficiencies in Kalispell's utility
systems that should be corrected in order to sustain the delivery of services in a rapidly growing
community. Two of the areas needing attention are water supply and storage capacity in the
upper pressure zone. In order to address the shortcomings of supply and storage, a project was
assembled that included a new well facility located in Westview Estates, a new 2.0 million
gallon water storage tank, and new transmission main from the tank to the City distribution
system. In July of 2007, contracts totaling 3,704,517.05 were awarded to DYK., Inc (tank) and
LHC, Inc. (pipeline and well house). Construction began shortly thereafter and has continued to
date. During construction of the pipeline between the tank and the existing City distribution
system, the contractor, LHC, discovered a serious and completely unforeseen soil condition.
Slightly east of West Spring Creek Road the contractor encountered a soft peat soil as his
heavy excavation equipment was moved along the pipe alignment. The alignment.equi
pment quickly sank
up to its roof in the soft peat soil and as a result work was stopped while the machine was
extracted and a solution for the problem was identified. SK Geotechnical was tasked to examine
the area and to recommend a course of action. Their report is attached for information. The full
extent of the peat -bog condition is not known. However, it appears to extend significantly in
each direction from the planned pipeline alignment so that shifting the pipeline (and acquiring
additional easements) is not practical or cost-effective. The recommended solution is to bore
under the soft area, similar to how we deal with a river crossing, and continue along the planned
alignment. SK Geotechnical data shows that boring to a depth of approximately 15 feet should
allow pipe installation into solid soil. The length of this work is approximately 380 feet. This will
require a change order to cover the boring cost, additional material of a different size and type
January 7, 2008 Change order - Upper zone Water Supply and Storage Project.doc
(14DPE pipe and fittings) and new connections at each end to the original pipe material. The
estimated total cost of this change is $152,320.00.
The Tipper Zone project budget included a contingency reserve for unexpected items.
This reserve has been eroded slightly to cover several small changes so that the remainder is
approximately $1 f ,000 less than needed to fully cover the cost of this major change.
Nonetheless, we are confident this project will be completed without the need to amend the
Water Fund budget. We do not anticipate any other significant changes on this project so that the
overall project cost impact of this change should be negligible. However, if we are mistaken, and
the cost of this change does raise the project cost above the amount budgeted, we will defer
another budgeted project to ensure the approved Water Fund budget amount is not exceeded.
RECOMMENDATION: Staff recommends approval of the change order.
ACTION REQUESTED: A T CITY COUNCIL MEETING OF JANUARY 7, A MOTION TO
APPRG VE A CHANGE ORDER FOR THE UPPER ZONE WATER SUPPL YAND
STORA GE PROJECT IN THE AMOUNT OF $152,320, 00 FOR ADDITIONAL COSTS TO
INSTALL PIPELINE.
FISCAL EFFECTS: Potential additional expenditure of funds totaling $152,320.00 from the
water fund.
ALTERNATIVES: As suggested by the City Council
Respectfully submitted,
James C. Hansz, P.E.
Director of Public Works / Ci ngineer
James H. Patrick
City Manager
Attachment: Engineer's technical analysis and recommendation, photos
January 7, 2008 Change order - Upper Zone Water Supply and Storage Project.doc