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CI'O OF SAN BERNARDrcP - REQUOT FOR COUNCIL AC:JON
From: ROGER G. HARDGRAVE
'Subject:
Approval of Change Order Nos. 4, 5, 6 &
7 -- Construction of Del Rosa Drive, from
9th Street to Baseline, per Plan No. 4993
---POWELL CONSTRUCTION COMPANY
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Pub 1 i c Works/Eng i neeri ng . ,,'<' -, 5
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March 25, 1987
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Date:
Synopsis of Previous Council action:
07-01-85 --- Resolution No. 85-251 adopted authorizing execution of the Right-of-Way
Certificate.
09-13-85 Resolution No. 85-365 adopted authorizing execution Agreement with County
relating to installation of traffic signals at Baseline Street.
10-21-85 Resolution No. 85-425 adopteQ authorizing execution of Program Supple-
ment No. to Local Agency - State Agreement No. 8-5033.
05-05-86 --- Plans approved and authorization granted to advertise for bids.
07-07-86 --- Award to contract for construction of Del Rosa - 9th to Baseline -
--Powell Construction. Resolution No. 86-283.
12-22-86 -- Approval of CCO #1, 2, & 3, to increase contract price to $555,640.10.
Recommended motion:
That Contract Change Orders Nos. 4, 5, 6 & 7 to the contract
with Powell Construction Company, for construction of Del Rosa
Avenue, from 9th Street, to Baseline Street, in accordanCe with
Plan No. 4993, be approved to authorize a net increase in cost
to the contract price of $9,899.50 from $555,640.10 to
$565,539.60 be approved.
cc: Ray Schweitzer, City Administrator
Warren Knudson, Director of Finance
ignaturB
Contlct person:
Gene R. Kl att
Phone:
5111
Supporting d.tI.uech.d: Staff Report - CCO 4. 5. 6 & 7
W.rd:
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FUNDING REQUIREMENTS:
Amount: $ 9,899.50
Source: (ACCT. NO.) 242-362-57342
(ACCT. DESCRIPTION) Del Rosa Drive - 9th to Baseline
Fln.nce: I)... t:' 4
Council Note.:
75.02.1
Agenda Item No.
9,
enO OF SAN _RNARDIQ) - RI!QUE'(J' FOR COUNCIL AC'Q)N
STAFF REPORT
Work on this project is nearing completion. During the course of
construction, it was necessary to negotiate 7 change orders to the contract.
Change Orders No. I, 2 and 3 were approved on 12-22-87, to authorize a total
increase in the contract price of $2,336.10, from $553,304.00 to $555,640.10.
The plans did not direct the installation of a waterproof membrane
to preclude drainage through the bearing seat joints at both abutment walls.
Drainage through these seats could result in corrosion of the steel dowels
securing the girders, and unsightly stains on the abutment walls. Change
Order No.4 directs the installation of an asphalt waterproofing membrane, at
an additional cost of $1,437.50.
An existing 42-inch C.S.P. pipe had to be relocated to allow con-
struction of an abutment wall. However, the special provisions failed to
provide for a method of payment for this work. Change Order No. 5 authorizes
the installation of a P.C.C. collar and headwall, at an increase in price not
to exceed $3,000.00.
Home Lumber Company made arrangements with the Contractor to install
curb and gutter, and paving, along. their property on the east side of Del Rosa
Avenue, between the bridge and 8aseline Street. An additional traffic sensor
loop.was needed in the pavement, paid for by Home Lumber. A 4-inch white
edge stripe was installed, to warn vehicles where the dirt shoulder starts
and discourage them from driving off the pavement. Also, a W41 (Signal Ahead)
Sign was installed for southbound traffic approaching Baseline Street. The
total cost of these items is $998.00, and are included in Change Order No.6.
Additional aggregate base was required under the pavement installed
by Home Lumber. It was necessary to determine the pay quantity of aggregate
base by calculated volume, rather than by weight, because of the extra work
paid for by Home Lumber. The plans did not show aggregate base to be in-
stalled between the bridge and Baseline Street. It was deemed advisable to
install 0.55' aggregate base within these limits, as the other portion of
the project. The estimated quantity in the bid schedule was 1493 tons. The
calculated quantity of additional aggregate base is 558 tons, for a total of
2,051 tons. The Contractor is claiming 2,498.45 tons, based upon weight
tickets. Our Resident Bridge Engineer has cored the roadway section and found
the actual thickness was 0.8'. The Contractor has refused to sign Change
Order No.7 for an increase of $4,464.00 in the contract price. There is the
possibility that he may file for arbitration of this item.
The total increase in the contract price authorized by Change Orders
No.4, 5, 6 & 7 is $9,899.50.
The total estimated project cost, based upon the actual. low bid price,
contained an amount of $62,008 for contingencies, which can be used to finance
the cost of these change orders. The total .mount of Change Orders No.1 - 7
is $12,235.60.
We recommend that Change Orders No.4, 5, 6 & 7 be approved.
3-25-87
75-0264
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Place Asphalt Membrane Waterproofing (in back of abutments) to seal
bearing seat joints at both abutments of Bridge 154C-596.
Waterproofing to be placed in accordance with CALTRANS' Standard
Specifications, dated July, 1984, Section 54-1. Refer to "As-Built"
plans, Sheet 15 of 11 for details of dimensions and extent of water-
proof application.
Payment will be made as "Work Performed by Special Forces" in
accordance with Section 9-1.03B of the above-mentioned Specifications.
Area s 76.0' x 2.5' = 190 Sq. Ft. each abutment
Cost s (for both abutments) 2 x 190.0 x $3.29
Special Mark-up (15~)
. $
s $
1,250.00
187.50
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Total
$ 1,437.50
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