HomeMy WebLinkAbout10/21/2008, C9 - BROAD STREET SEWERLINE IMPROVEMENTS, SPECIFICATION NO. 90786 �I
Dt
council MatioOctober 21 2008
j acEn& REpoM m.N=9"
CITY OF SAN LUIS OBISPO
FROM: Jay Walter, Director of Public Works
Prepared By: Christine Cornejo, Engineering Technician
SUBJECT: BROAD STREET SEWERLINE IMPROVEMENTS, SPECIFICATION
NO. 90786
CAO RECOMMENDATION
1. Approve plans and specifications for Broad Street Sewerline Improvements, Specification No.
90786
2. Authorize Staff to advertise for bids and authorize the City Administrative Officer to award
the contract if the lowest responsible bid is within the Engineer's Estimate of$478,750.
DISCUSSION
Replacement of wastewater collection pipes is part of an ongoing program to replace aging,
deteriorating, or otherwise troublesome sewer infrastructure. This program has several objectives.
Among them are: 1) Ensure uninterrupted sewage flow without health hazard or effluent leakage, 2)
Reduce the need for emergency repairs, and 3) Reduce or eliminate periodic maintenance
requirements. This project will accomplish these objectives for part of the City wastewater
collection system.
The existing clay sewer lines in Broad Street were installed in the early 1900's. Besides being over
or close to one hundred years old, numerous sections have root intrusion from trees in the-adjacent
parkway which have contributed to cracks and sections of pipe that have sags in the alignment. The
sewer crew has done extensive repairs to broken joints and numerous cracks in the pipe over the
years. The new sewerline will be increased to an 8" diameter pipe from the existing 6" diameter
pipe to accommodate the new service requirements expected from the South Broad Street Corridor
Plan. Additionally, a Caltrans street reconstruction project is scheduled for construction in June of
2009; therefore this project was given priority in order to avoid further cost of repairs, construction
and traffic conflicts with the Caltrans project.
CONCURRENCES
The Community Development Department has given this project a categorical exemption from
environmental review. Caltrans has issued the City an encroachment permit for this work.
Cq- �
r � 1
Broad Street Sewerline Improvement, Specification No. 90786 Page 2
FISCAL IMPACT
This project is identified in the 2007-09 Financial Plan, Appendix B, page 3-133. These Broad
Street sewerline improvements will be funded from the Wastewater Collection System
Improvements Main account. Currently there is $1,588,297 in the Main Account. There is
sufficient funding in the Main Account to support the project costs. Funding will be transferred
from the main account to the project account, at time of contract award, based on construction
bid amounts.
Broad Street Sewerline Replacement Budget
(90786)
Engineer's Estimate: _ _$478,750
* Contingencies: $71,813
Total for Construction: $550,563
Testing. $10,000
Miscellaneous (incl printing): $250
,Total Project Cost: $5609813
Main Account Available Funding: $1,588,297
* Because of the lack of information available pertaining to the relevant location of the existing
utilities to the new sewerline in Broad Street, Construction Contingency funding is requested at
15%of the Engineer's Estimate.
ATTACHMENT
Vicinity Map
AVAILABLE FOR REVIEW IN THE COUNCIL OFFICE
Plans and Special Provisions
L:\Staff-Reports-Agendas-Minutes\_CAR\2008\CIP\90786 Broad Street Sewerline Improvements\90786 CAR adv.doc
09- :�-
Attachment 1
Li ' - Lu
SAN RLO
,z � � o
o :2iV)FUN O N P�Q� J -i C-) ' ARF
J
m LLJ
�
WOODBRIDGE
-9"
z CAUDILL
MITCHELL
O J �� •". .
LAWRENCE �' �� MOR I ON
Lij
TONERIDGE m
� J
Q
Q
ORCU
PROJECT SCOPE
Broad Street: N
Woodbridge - Mutsuhito
MMA- City O f BROAD STREET SEWEIMPROVEMENTS
smaill
l� SPECIFICATIONON NO.NO.90786
san tuts OBISPO LOCATION MAP �9'3