HomeMy WebLinkAboutAGENDA REPORT 1993 1215 CC REG ITEM 08R ITEM
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AGENDA REPORT •
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TO: The Honorable City Council n
FROM: Kenneth C. Gilbert, Director of Public Works (/ ., A7201r
DATE: December 6, 1993 (Council Meeting 12-15-93)
SUBJECT: Consider Adjustment to the Approved Quantities of Work
Performed in Constructing the 1993 Slurry Seal Project
BACKGROUND
Last October the City Council accepted the subject project as
complete and authorized the recordation of the Notice of
Completion. The staff report which accompanied that action
mentioned receipt of a Notice of Potential Claim pertaining to
certain disputed contract pay quantities.
DISCUSSION
Staff, the City Engineer's staff and the project inspectors have
met with and had conference calls with the contractor on several
occasions in an attempt to resolve the difference between the
City's approved quantity for slurry seal applied to the streets and
the contractor's calculation of that figure. This report
recommends resolution of that dispute through the approval an
increase in approved quantity slurry seal as described below.
The City's approved tonnage figure for the aggregate crushed rock
used for both Type I and Type II slurry seal is 2,599. The weight
tickets show that 3 ,077 tons were delivered to the site. The
difference between these two figures is 478 tons. Paid at the
lesser bid amount of $74 per ton for Type I slurry, the initial
amount of alleged underpayment was $35,372 .
The City's approved quantity of aggregate was based upon an a
method of measurement agreed to by the City and the contractor
before the start of work. That method utilized a gauge on each
truck which measured the amount of material being applied. It is
now the opinion of staff that this gauge was not calibrated
properly. We believe that the agreed to application rate (pounds
of material applied per revolution of the gauge) was estimated
incorrectly. Although mentioned by the Contractor at the time, the
matter was not thoroughly discussed and application rate was not
revised.
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Slurry Seal 1993
December 1993
Page 2
Both the Contractor and the City's inspectors measured the amount
of waste at each of the stock pile sites. The Contractor estimated
the amount of waste to be only 231 tons. This figure subtracted
from the above mentioned difference of 478, leaves an additional
pay amount of 247 T x $74 = $18, 278 . The City's two inspectors
independently measured the amount of waste and estimated the amount
to be 320 and 360 tons for an average of 340 tons. The 340 Ton
figure subtracted from the above mentioned difference of 478,
leaves an additional pay amount of 138 T x $74 = $10,212 . The
Contractor has agreed to accept this increase.
If approved, this increase revise the contract amount from
$246,846 .96 to $257,059.96 . The total project costs will change
form $267, 714. 02 to $277,926.02. The amount budgeted for the
project is $300,000 . No additional appropriation will be required.
RECOMMENDATION
Staff recommends that the City Council approve an adjustment to the
previously approved quantities for the 1993 Slurry Seal Project by
increasing the tonnage of Type I Slurry Seal from 1,916 T to 2 ,054
(net increase 138 T x $74 =$10, 212) .
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