HomeMy WebLinkAbout24- Public Works CITY OF SAN BERNARDINO REQUEST FOR COUNCIL ACTION
File No. 7 . 30-19
ROGER G. HARDGRAVE Approval of Change Order No. 1 -
From: Subject: Drilling Two Water Wells at San
Public Works Bernardino International Airport,
per Plan No.Dept: - - ORIGINAL LAYNE-WESTERNS 4 9 0 ---
Date: 10 0 7 9 6
Synopsis of Previous Council action:
10-04-93 - Resolution No. 93-382 adopted authorizing Mayor to
execute application to Economic Development
Administration for a grant.
0.3-21-94 - Resolution No. 94-68 adopted authorizing execution of
approval and award of grant.
06-17-96 - Plans approved and authorization granted to advertise
for bids.
08-19-96 - Resolution No. 96--262 adopted awarding a contract to
Layne-Western for the low bid price of $235 , 132 . 00 .
Recommended motion:
That Change Order No. 1 to the contract with Layne--Western, for
drilling two water wells at San Bernardino Trade Center and
International Airport, in accordance with Plan No. 9490 , to
authorize the drilling of an additional 150 feet for the irrigation
well, and increase the casing size from 12 to 14 inches , at the
agreed upon price of $25 , 709 . 30 , from $235 , 132 . 00 to $260 , 841 . 30 ,
be approved.
cc: Bill Bopf
Shauna Clark
Bernie Kersey
Construction Inspector Signature
Contact person: Roger G. Hardgrave Phone: 5025
Staff Report,
Supporting data attached: Contract Change Order #1 Ward: 1
FUNDING REQUIREMENTS: Amount: $25 , 709 . 30 (EDA Grant & IVDA)
Source: (Acct. No.) 242-362-5504-1993
Acct. Description) Street- Im vements -San Bernardino
Trade Center & International Airport Finance•
Council Notes:
Agenda Item No. 7
CITY OF SAN BERNARDINO - REQUEST FOR COUNCIL ACTION
STAFF REPORT
The plans for drilling two water wells at the San
Bernardino Trade Center and International Airport, show the
irrigation well to be at a depth of 350 feet with a 12-inch steel
casing. However, after this depth was reached, tests determined
that the desired rate of production of 800 - 1 , 000 gpm would not
be achieved.
A recommendation was made by our Water Department to
drill a 150-foot pilot hole to ascertain if good water bearing
strata exists between 350 and 500 feet in depth. After the pilot
bore was completed, tests determined that good water production
soils existed between 350 and 485 feet.
Increasing the production rate of this well by drilling
to an additional 150 feet would allow the pumps to be operated
only during off-peak rates for electricity. It is estimated that
the additional costs for the increased depth will be recovered
within a little over two years .
The Contractor has provided a price quote for the lump
sum cost of $25 , 709 . 30 to drill the pilot bore and the additional
150 feet, and increase the casing from 12-inch to 14-inch. We
have reviewed this price with our Water Department and verified
that it is fair and reasonable for the work involved.
The total estimated project cost included an amount of
$37 , 868 for contingencies, which can be used to finance the cost
for this extra work.
Funds to finance the additional costs by Change Order No.
One will be provided from the following sources :
Economic Development Agency Grant - 750
Inland Valley Development Agency - 250
All costs incurred will be charged to Account No. 242-
362-5504-1993 , and billed to the EDA grant and IVDA. No City
funds will be used to finance any portion of the additional
costs.
We recommend that Contract Change Order No. One be
approved.
10-07-96
75-0264
FEDERAL PROJECT NO. 07-49-02680
CONTRACT CHANGE ORDER
CHANGE ORDER NO. 1
DATE: 7/29/96
Agreement Date: 2/12/96
NAME OF PROJECT: DRILLING AND DEVELOPING A 1611 DIAMETER, 11001
DEEP REVERSE ROTARY DOMESTIC WELL AND A 1211 DIAMETER. 3501 DEEP
IRRIGATION WELL.
OWNER: CITY OF SAN BERNARDINO
CONTRACTOR: LAYNE-WESTERN COMPANY
The following extra work is to be performed, as directed by the
Resident Engineer, and the following changes are hereby made to the
CONTRACT DOCUMENTS:
(1) Drill the Irrigation well an additional 150-feet and place a
14-inch casing in lieu of the 12-inch casing that was specified, in
order to increase the production of the well from 500 GPM to
approximately 1,000 GPM, at the agreed price of $ 25,709.30.
JUSTIFICATION:
In the drilling of a well it is never certain what the eventual
production capacity will be, and until the boring logs are
formulated and evaluated the ultimate production can only be
estimated. In this case, by drilling an additional 150-feet and
increasing the casing to 14-inches, the production can be doubled.
This will mean that the pumps will only have to be on for 12-hours
a day and can be run during off-peak hours and the IVDA will
receive a discounted energy rate for the irrigation well. The
payback of the additional costs will be 2 .17 years. Additionally,
the pumps will operate 1/2 of the time, resulting in a substantial
long term savings in the operation and maintenance cost of the
mechanical equipment.
CHANGE TO CONTRACT PRICE:
ORIGINAL CONTRACT PRICE: $ 235,132 .00
CURRENT CONTRACT PRICE adjusted
by previous change Order: $ 235,132 .00
The CONTRACT PRICE due to this CHANGE ORDER will be increased by:
The Change Order will be at a cost of $ 25 ,709 .30
Page 1
Contract Change Order No. 1
07-49-02680
The NEW ESTIMATED CONTRACT PRICE including this CHANGE ORDER will
be $ 260,841.30
CHANGE TO CONTRACT TIME: To Be Determined
The CONTRACT TIME will be (increased) by To Be Determined calendar
days.
The date for completion of all work will be To Be Determined
Approvals Required:
To be effective, this Order must be approved by the Federal agency
if it changes the scope or objective of the PROJECT, or as may
otherwise be required by the SUPPLEMENTAL GENERAL CONDITIONS.
Accepted by:
Layne-Western Company Date
Requested by:
Steven Enna, Construction Engineer Date
Recommended by:
William Bopf Date
Inland valley Development Agency
Recommended by:
Roger G. Hardgrave Date
Director of Public Works/City Engineer
Economic Development Administration
Approved by:
Date
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