HomeMy WebLinkAbout02/29/2000, C10 - STREET RECONSTRUCTION/RESURFACING-SPRING 2000 SPECIFICATION NO. 90012A council
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CITY OF SAN LUIS OBISPO
FROM: Michael D.McCluskey,Public Works Director�"✓" v
Prepared by: Daniel Van Beveren,Civil Engineer-yV3�
SUBJECT: Street Reconstruction/Resurfacing—Spring 2000
Specification No.90012A
CAO RECOMMENDATION:
1. Approve plans and specifications for"Street Reconstruction/Resurfacing- Spring 2000"
2. Authorize staff to advertise for bids
3. Authorize the CAO to award the contract if the lowest responsible bid is within budget
4. Authorize consolidation of budget balances for three completed street projects into the current
street reconstruction/resurfacingproj ect budget
DISCUSSION
The City's Pavement Management Plan(PMP)was adopted by the City Council on April 14, 1998.
The key elements of the PMP are the establishment of eight principle areas within the city, and a
maintenance plan in which each of these eight areas will receive maintenance over an eight-year
period This project completes the remaining work in pavement area 2. Work in pavement area 3
will also be conducted this year in another project soon to follow. Streets located in the central
downtown area are not part of this rotation because they require maintenance more frequently.
In 1998,Nichols,Vallerga&Associates(NVA),a private consulting firm specializing in pavement
design and maintenance,was awarded a contract for engineering services,per Specification 9217.
NVA performed structural testing of selected City streets primarily located in pavement areas 1 and
2. The streets tested were those which had been selected for rehabilitationbased on the City's PMP
which utilizes the computer program MicroPaver. NVA conducted the tests using the falling
weight deflectometer method, a nondestructive testing method of determining a street's structural
integrity. As part of its contract with the city,NVA issued its findings in a report,"Falling Weight
Deflectometer(FWD) Testing and Street Rehabilitation Evaluation of Various Streets",in which
test results and design recommendations were presented.
Last year, construction was performed on two street reconstruction/rehabilitationprojects, which
followed the design recommendations in the above-mentioned NVA pavement testing report. City
Public Works Engineering staff has now completed the plans, specifications, and engineer's
estimate for "Street Reconstruction/Resurfacing— Spring 2000". These plans and specifications
present the design of street improvements for the remaining area 2 streets included in the NVA
reporL
This project includes some full-thickness asphalt reconstruction,which will expose the existing soil
beneath the street. It is important that we do this reconstruction work in the dry season when the
chance for exposed subgrade soil to be impacted by rainfall is minimal.
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Council Agenda Report—Street Reconst mction/Resurfacing,Spring 1999—90012A
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A gap-graded mix of rubberized asphalt will be used on several of the streets contained in this
project. Compared to traditional asphalt, rubberized asphalt has higher strength, yields less vehicle
noise, stays black longer, recycles used automobile tires, and will save money by allowing use of a
thinner overlay thickness in the design. Applying this advance in pavement technology to the
pavement maintenance program will help to extend the life of the pavement system in a cost-
effective manner.
CONCURRENCES
The Community Development Department has approved this project for environmental clearance.
FISCAL EWPACT
Estimated Construction Cost
Engineer's Estimate $999,042
Contingencies (10%) $99,904
Total $1,0989946
Balance of Construction Budget Available $2,095,094
Consolidation of Budget Balances
Public Works is recommending that the following C1P project budget balances be consolidated
into the current street reconstruction/resurfacing project budget:
1999-00 Street Resealing $458,000
1999-00 Street Microsurfacing $47,971
1997-99 Street Reconstruction/Resurfacing $1,609,232
Because the contract expenses for last summer's street resealing and microsurfacing project were
inadvertently charged to the current street reconstruction/resurfacing project budget, the budget
remaining should be transferred to cover those expenses.. Also the remaining balance from the
1997-99 reconstruction/resurfacing project budget should be transferred to cover the project work
that will be constructed during the current Financial Plan period.
ATTACE MENTS:
8-1/2 x 11 Map of City Pavement Areas
Plans and Specifications for "Street Reconstruction/Resurfacing— Spring 2000" —available in the
Council Reading file
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