HomeMy WebLinkAboutPW Fair Dr. Retaining Wall; Plans and Specsa --s
CITY OF
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Agenda Item No:
Meeting Date:
7
July 19, 2010
SAN RAFAEL CITY COUNCIL AGENDA REPORT
Department: Public Works
Prepared by: -7 City Manager Approval:
,fl,71 Director of Public Works (LB)
File No.: 16.01.253; 16.01.257
SUBJECT: ADOPT PLANS AND SPECIFICATIONS FOR CONSTRUCTION OF APPROXIMATELY
320 FEET OF RETAINING WALL ON FAIR DRIVE, CITY PROJECT NO. 11160, AND 87
FEET OF RETAINING WALL AT 60 HILLSIDE AVENUE, CITY PROJECT NO. 11147, AND
AUTHORIZE THE CITY CLERK TO CALL FOR BIDS.
RECOMMENDATION:
Adopt Plans and Specifications for two projects.
BACKGROUND:
During the rainy season of 2009/2010, the existing retaining wall located at 5 Fair Drive failed and a
portion of the wall collapsed. The retaining wall was not engineered as the design consisted of sacks of
concrete laid one of top of each other and did not consider any load bearing quantities. On December 16,
1963, the City of San Rafael obtained a slope easement and agreed to maintain the Fair Drive retaining
wall. Replacement of the existing collapsed portion of the wall is required to maintain stability for the
hillside and replacement of the remainder of the wall is recommended as it is anticipated that it will most
likely collapse during the next rainy season. The proposed 5 Fair Drive Retaining Wall Replacement
Project will remove the existing wall in its entirety and replace it with approximately 320 linear feet of an
engineered structural wood wall with concrete foundations containing steel piers.
During the rainy season of 2009/2010, the existing slope adjacent to 60 Hillside Avenue failed;
consequently the slope and a portion of the adjacent retaining wall collapsed. In order to stabilize the
hillside, replacement of the collapsed portion of the wall and slope with 87 linear feet of a new retaining
wall is required. The 60 Hillside Avenue Retaining Wall Improvements Project proposes to install an
engineering structural wood wall with concrete foundations containing steel piers.
On July 6, 2010, City Council approved the 5 year Capital Improvement Project list, allocating $450,000
for these two retaining wall projects ($350,000 for the 5 Fair Drive Retaining Wall Replacement Project
and $100,000 for the 60 Hillside Avenue Retaining Wall Improvements Project).
The plans have been approved by the Public Works City Engineer and a copy is available at the City
Clerk's office for review.
FOR CITY CLERK ONLY
File No.:
Council Meeting: I C -(I aO / D
Disposition: C.3 D12219U-Qd 4-4F(-
SAN RAFAEL CITY COUNCIL AGENDA REPORT / Page: 2
ANALYSIS: Adoption of the project plans and specifications is necessary for the plans to go out to bid
and the construction of the projects to begin. Construction is anticipated to start in August of 2010 and
finish in October 2010.
FISCAL IMPACT: The estimate for construction of the two projects is $450,000 ($350,000 for the 5 Fair
Drive Retaining Wall Replacement Project and $100,000 for the 60 Hillside Avenue Retaining Wall
Improvements Project). Staff will request funding allocation after the construction bids have been
opened.
ACTION REQURED: Adopt Plans and Specifications for the Retaining Wall on Fair Drive (Project No.
11160) and for the Retaining Wall at 60 Hillside Avenue (Project No. 11147) on file with the City Clerk,
and authorize the City Clerk to call for bids on these projects.
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CITY OF SAN RAFAEL
ROUTING SLIP / APPROVAL FORM
INSTRUCTIONS: USE THIS FORM WITH EACH SUBMITTAL OF A CONTRACT, AGREEMENT,
ORDINANCE OR RESOLUTION BEFORE APPROVAL BY COUNCIL / AGENCY.
SRCC AGENDA ITEM NO. B
DATE OF MEETING: July 19, 2010
FROM: Parviz Mokhtari, P.E.
DEPARTMENT: Public Works
DATE: July 9, 2010
TITLE OF DOCUMENT: ADOPT PLANS AND SPECIFICATIONS FOR CONSTRUCTION OF
APPROXIMATELY 320 FEET OF RETAINING WALL ON FAIR DRIVE, CITY PROJECT NO. 11160, AND
87 FEET OF RETAINING WALL AT 60 HILLSIDE AVENUE, CITY PROJECT NO. 11147, AND
AUTHORIZE THE CITY CLERK TO CALL FOR BIDS.
rI . . . . ........
Department Head (signature)
(LOWER HALF OF FORM FOR APPROVALS ONLY)
APPROJVED AS COUNCIL / AGENCY APPROVED AS TO FORM:
AtE6ITEM: . A
nature)
NOT APPROVED
REMARKS:
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City Attorney (signature)
