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Council |
Date |
March
8, 2010 |
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Agenda Item No. 6A Roll Call No. 10-
Communication
No. 10-131 Submitted
by: Jeb E. Brewer, P.E., City Engineer |
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AGENDA HEADING:
Ordering construction of the
following: S.W. 7th Street Bridge over
the Raccoon River Rehabilitation - Receiving bids, (3-16-10), and Setting date
of hearing, (4-12-10). (Construction Estimate - $1,715,469).
SYNOPSIS:
Recommend the City Council
proceed with construction of the improvement and set dates to receive bids and
hold a public hearing, as required by Iowa Code, utilizing the method of
financing referenced below. The rehabilitation of the S.W. 7th Street Bridge
over the Raccoon River was identified as a high priority project on the 2009 City-Wide
Bridge and Structure Evaluation.
FISCAL IMPACT:
Amount: $1,715,469 City Engineer's Estimate
Funding Source: 2010-2011 CIP, Page Bridge-15, S.W. Seventh
Street Bridge over the Raccoon River, BRV046:
The project is eligible for 80% HBRR funding up to a maximum of
$1,000,000 under IDOT Agreement No. 01-09-HBRRU-005, with the remaining
$715,469 from G. O. Bonds.
ADDITIONAL INFORMATION:
Due to the condition of this structure, it has become eligible for
Federal Highway Bridge Program Funds and the City has an agreement with Iowa
Department of Transportation funding 80% of the construction costs up to a
maximum of $1,000,000.
Recent bridge inspections have determined that this structure, which was
originally constructed in 1915 and last rehabilitated in 1968, is showing signs
of deterioration and should be rehabilitated.
Work included in the project consists of deck repairs, expansion joint
replacement, placement of a high-density portland
cement concrete overlay, repair of structural elements including piers,
columns, and arches, and repair of curbs, sidewalks, and approach
pavement. Because this will be a major
rehabilitation of the existing structure, S.W. 7th Street will be
closed during construction.
The Engineering Department
has prepared plans, specifications, form of contract documents, and City
Engineer’s estimate for the construction of the S.W. 7th Street Bridge over the
Raccoon River Rehabilitation, 12-2009-002.
The improvement includes concrete removals, structural concrete, reinforcing
steel, epoxy coated reinforcing steel, deck overlay, deck repair, steel
extrusion joint with neoprene, neoprene gland installation and testing, blast
cleaning structural steel, painting structural steel, removal of sidewalk, sidewalk 6" PCC,
electrical circuit, construction survey, pavement markings, temporary concrete
barrier rail, traffic control, changeable message sign, mobilization, bearing
repair, epoxy crack injection and concrete repairs; all in accordance with the
contract documents, including Plan File Nos. 509-119/149 for the S.W. 7th
Street Bridge over the Raccoon River in Des Moines, Iowa.
The estimated construction
cost is $1,715,469. The proposed plans,
specifications, and form of contract documents are available for public
inspection in the City Engineer's Office.