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CITY OF SAN.BERNAkbINO - REQUEST FOR COUNCIL ACTION
From: William Woolard, Interim Director Subject: Authorization to execute Change
Order No. Two to contract with David T.
Dept: Development Services Wasden, Inc. for storm drain improvements
in "E" Street from 4th Street to 5th Street,
Date: December 6, 2000 and pavement rehabilitation from 4"' Street
to 6th Street.
File No. 4.7207 MCC Date: 12/18/2000
Synopsis of Previous Council Action:
07/10/00 Allocation of $50,000 for pavement rehabilitation at "E" Street (Account No. 129-
367-5504-7192), and $200,000 for storm drain improvement at "E" Street from 4`' to 5'
Streets (Account No. 248-368-5504-7207) in 2000/01 Capital Improvement Program budget.
10/02/00 Adopted Resolution awarding contract to David T. Wasden, Inc. in the amount of
$178,798.50 for construction of storm drain improvements on "E" Street from 4'h to 5"'
Streets, and pavement rehabilitation on "E" Street from 4`h to 6' Streets.
12/04/00 Authorized execution of Change Order No. One to contract with David T. Wasden,
Inc. in the amount of $7,452.34.
Recommended Motion:
That the Mayor and Common Council approve Contract Change Order No. Two to the
contract with David T. Wasden, Inc. for storm drain improvements in "E" Street from 4th
Street to 5th Street, and pavement rehabilitation from 4th Street to 6`h Street and authorize the
Purchasing Manager to increase Purchase Order 994408 by an amount equal to $26,493.70 to
cover the cost of this change order. >
William Woolard
Contact person: Michael Grubbs, Field Engineer Phone: 5179
Supporting data attached: Staff Report and Change Order Ward: 1
FUNDING REQUIREMENTS: Amount: $26,493.70
Source: (Acct. No.'s) 248-368-5504-7207, 129-367-5504-7192 &
CDBG 99-0039
Acct. Description: "B" Street pavement rehab.; storm drain
improvements at "E" St.; and street resurfacing
downtown area
Finance:
Council Notes
Agenda Item No.
CITY OF SAN BERNARDINO — REQUEST FOR COUNCIL ACTION
STAFF REPORT
Subject:
Authorization to execute Change Order No. Two to contract with David T. Wasden, Inc. for
storm drain improvements in "E" Street from 4th Street to 5th Street, and pavement
rehabilitation from 4"' Street to 6`h Street.
Background:
On May 15, 2000, the Mayor and Common Council awarded a contract to David T. Wasden,
Inc. in the amount of $178,798.50 for storm drain improvements in "E" Street from 4th Street
to 5th Street and pavement rehabilitation from 4" Street To 6`h Street.
During construction, subsurface conditions were encountered which were different from the
conditions shown on the plans. Under Section 3-4 "Changed Conditions" of the Standard
Specifications, the contractor is allowed to recover additional costs due to "subsurface or latent
physical conditions differing materially from those represented in the contract.99
The Mayor and Common Council on 12/04/00 approved contract Change Order No. One in
the amount of $7,452.34. This change order reimbursed the contractor for pot holing of
utilities, on October 16-19, 2000, that were encountered during construction.
The costs incurred due to this change order were primarily due to utility conflicts and are
described in detail in the attached Change Order No. Two. The total net cost of the change is
$26,493.70.
This project was awarded on an accelerated working/calendar day schedule with a mandatory
completion date of November 18, 2000, subject to a liquidated damage penalty of $1,500 per
day for each calendar day used past November 18, 2000. David T. Wasden, Inc. worked
closely with City staff to assure completion of the project within the specified time limit. The
contractor also incurred some delays awaiting field design changes to the storm drain due to
the utility conflicts. However, those delays were minimal due to the level of cooperation
between staff and the contractor and therefore there were no additional charges associated with
the delays.
Although the total cost of the project ($212,744.54) exceeds the original bid amount plus
contingencies ($178,798.50+$26,881.50=$205,680.00), it was still $10,034.36 less than the
second lowest bid amount of$222,778.90 and well within the total budget originally authorized
for the project.
STAFF REPORT continued
Financial Impact:
Sufficient funds are available for the cost of this change order, Change Order No. One, and
remaining inspection and testing costs, from the unencumbered balance in Account No. 248-
368-5504-7207 (Storm drain improvements at "E" Street - $26,771) and Account No. 129-
367-5504-7192 (Pavement rehab at "E" Street - $15,818).
Recommendation:
That the Mayor and Common Council authorize execution of Change Order No. Two to
contract with David T. Wasden, Inc. for storm drain improvements in "E" Street from 4th
Street to 5th Street, and pavement rehabilitation from 4' Street to 6" Street and authorize the
Purchasing Manager to increase Purchase Order No. 994408 by an amount equal to
$26,493.70.
Rnwi
DEVELOPMENT SERVICES DEPARTMENT
ICITY OF 300 North"D"Street•San Bernardino•CA 92418-0001
San Berflardln0 Planning&Building 909.384.5057•Fax: 909.384.5080
s,
Public Works/Engineering 909.384.5111 •Fax: 909.384.5155
www.ci.san-bernardino.ca.us
CONTRACT CHANGE ORDER NO. TWO
FILE NO. 4.7207 DATE: DECEMBER 6,2000
PROJECT: STORM DRAIN IMPROVEMENTS IN "E" STREET
FROM 4TH STREET TO 5TH STREET AND PAVEMENT
REHABILITATION FROM 4TH STREET TO 6TH STREET.
TO: David T. Wasden, Inc.
3220 Star Canyon Circle
Corona, CA 91720
GENTLEMEN:
You are hereby compensated for performing additional work as follows:
Description of Change Cost
Item 1: Increase in item 6 (24" RCP) due to increased trench depth $ 9,636.00
Item 2: Increase in item 7 (18" RCP) due to increased trench depth $ 2,490.00
Item 3: Increase in item 8 (manhole No 2) due to increase in trench $ 6,000.00
depth.
Item 4: Increase in item 9 (CB no 1, w=3.50') due to increase in trench $ 1,500.00
depth.
Item 5: Increase in item 10 (CB no 2, w=7.00') due to increase in trench $ 1,750.00
depth.
Item 6: Increase in item 11 (CB no 3, w=14.00') due to increase in $ 2,250.00
trench depth.
Subtotal of Items I through 6...................... $ 23,626.00
Contract Change Order No. Two
Storm Drain Improvements in "E" St. from 4th St. to 5th St.
& Pavement Rehab from 4th St. to 6th St
Page 2 of 3
Item 7: Modification to concrete collar at d/s outlet to provide for two 18" $ 2,000.00
RCP's.
Item 8: Slurry backfill on 5th Street crossing to assure proper support for $ 1,000.00
utilities.
Item 9: Replace 24 feet of 18" RCP n/s of 5th in flat section with 24" $ 7,079.53
elliptical RCP 2000-D, including concrete collar.
Subtotal items 7through 9........................... S 10,079.53
GRAND TOTAL COST OF CHANGE ORDER NO. TWO..... $ 33,705.53
JUSTIFICATION
Items 1-6:
As a result of the pot-holing authorized by CCO #1 it was determined that a cluster of GTE fiber
optic ducts crossing at Station 15+03 in "E" Street was in conflict with the proposed location of
the storm drain. Additionally, a sewer main at Station 11+95 was found to constrain the lower
limit of the storm drain To get over the sewer main and under the cluster of fiber optic ducts,
surveyors determined accurate elevations of the utility lines and staff re-designed the profile of
the storm drain. The re-design involving lowering the storm drain so as to "squeak" between the
utilities. This change resulted in an increase in the depth of the storm drain varying from 1 foot
at the downstream end to 3 feet at the upstream end (15% to 50% increase in depth). Increasing
the depth of the storm drain resulted in additional costs for the contractor.
Item 7: In order to get under a bank of Pacific Bell Telephone conduits at the downstream end
of the project ("E" Street just north of 4th Street) the plan had to be modified by substituting two
18" RCP pipes in place of one 24" RCP pipe. This replacement solved the clearance problem
but required a more complex concrete collar to join the two 18" RCP's to the existing catch basin
structure.
Item 8: In order to install the storm drain across 5th Street just west of "E" Street it was
necessary to close 5th Street for one day to accommodate the installation. To minimize impact on
traffic, the work was accomplished on Saturday October 28, 2000. The installation procedure
involved excavating across the street, installing the storm drain pipe, backfilling and restoring
the pavement. When backfilling the trench with native soil proper compaction must be achieved
in order to avoid settlement of the pavement. To expedite reopening of the street to traffic, the
contractor was authorized to backfill the trench with a one sack cement-sand slurry mix,
eliminating the need for compaction testing. This allowed 5th Street to be reopened to traffic the
r
Contract Change Order No. Two
Storm Drain Improvements in `B" St. from 4th St. to 5th St.
& Pavement Rehab from 4' St. to 6th St.
Page 3 of 3
same day and allowed the City to avoid the cost of having a soils technician available on an
overtime basis to perform the required compaction testing.
In order to slip through the utilities in 5th Street it became necessary to reduce the slope of the
proposed 18 inch RCP for a length of approximately 24 feet. Reducing the slope of the pipe
resulted in a reduction in the amount of flow the pipe could carry. To assure that the storm drain
would be able to carry flow equal to the original design it was necessary to change the 18 inch
RCP to an elliptical 24" RCP. The elliptical pipe had to be used in order to achieve proper
clearance from the pavement surface.
The total project cost is summarized as follows:
Original Contract Amount $178,798.50
Contract Change Order No. One $ 7,452.34
Proposed Contract Change Order No. Two $ 33.705.53
Total Original Contract Cost plus Change Orders $219,956.37
Increase (decrease) in cost due to overruns/underruns ($ 7.211.83)
Adjusted Contract Amount $212,744.54
Net Increase in project cost due to Change Order#2: $ 26,493.50
($33,705.33 - $7,211.83)
Additional time to complete Contract due to Change Order.................0 Working Days
DAVID T. WASDEN, INC. CITY OF SAN BERNARDINO
CONTRACTOR DEVELOPMENT SERVICES
Accepted Approved:
By: By:
Bill Woolard
Title: Interim Dir. of Development Svcs.
Date: Date:
Approved By Mayor and Common Council:
Item Number:
Approval Date