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TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Heeb Street Retaining Wall Reconstruction Project
CIP 1002086 -Heeb Street Wall
DATE: September 14, 2009
City Engineer Gus Psihoyos recommends City Council approval of the plans,
specifications, form of contract and the estimated cost of $178,869.45 for the Heeb
Street Retaining Wall Reconstruction Project.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
Michael C. Van Milligen
MCVM:jh
Attachment
cc: Barry Lindahl, City Attorney
Cindy Steinhauser, Assistant City Manager
Gus Psihoyos, City Engineer
TO: Michael C. Van Milligen, City Manager
FROM: Gus Psihoyos, City Engineer
DATE: September 11, 2009
SUBJECT: Heeb Street Retaining Wall Reconstruction Project
CIP 1002086 -Heeb Street Wall
INTRODUCTION
The enclosed resolution is in reference to the public hearing on the Heeb Street Retaining
Wall Reconstruction Project.
BACKGROUND
The Heeb Street Retaining Wall is located at the intersection of Kaufmann Avenue and
Heeb Street. This is an existing City-owned limestone retaining wall that is showing signs of
distress (existing stones have broken loose from the wall). The wall height varies from 7
feet to 11 feet, with a wall length of 75 feet. The wall supports Heeb Street (a 20-foot wide
street) and has an 8-inch sanitary sewer main and 4-inch watermain in close proximity.
The Engineering Department has worked with IIW Engineers & Surveyors, PC to analyze
the existing wall. Concrete barriers were placed (summer of 2008) in the parking lot behind
Meineke Muffler at the corner of Heeb Street and Kaufmann Avenue to protect pedestrians
and vehicles from possible falling rock.
DISCUSSION
Engineering is proposing that the project base bid include wall reconstruction with native
Dubuque limestone, with geofoam as a backfill material. This reconstruction would be
similar to the retaining walls at Grove Terrace and St. Mary's Street. The existing wall is
limestone which is why Engineering proposes this as the base bid.
An alternate bid would be installation of an integral, limestone-buff colored concrete wall
that would simulate the look of native limestone. This type of installation was done
successfully at the Loras College Alumni Center.
In order to reconstruct the retaining wall, most of the street will need to be removed to
accommodate the backfill. Along with this work, the watermain and sanitary sewer utilities
will need to be partially reconstructed and protected to accommodate the work. The street
pavement would be 7-inch concrete and match the existing width of 20 feet.
RECOMMENDATION
recommend that the City Council approve the plans, specifications, form of contract and
the estimated cost for the Heeb Street Retaining Wall Reconstruction Project.
BUDGET IMPACT
The estimate of probable cost for the Heeb Street Retaining Wall Reconstruction Project is
as follows:
Estimate
Construction Contract $135,251.00
Contingency (15%) 20,287.65
Construction Engineering & Inspection (15%) 23,330.80
Total Project Cost $178,869.45
The funding for the Heeb Street Retaining Wall Reconstruction Project will be as follows:
CIP No. Fund Description Fund Amount
1002086 Heeb Street Wall $178,869.45
Total Project Funding $178,869.45
ACTION TO BE TAKEN
The City Council is requested to approve the plans, specifications, form of contract and the
estimated cost for the Heeb Street Retaining Wall Reconstruction Project.
Prepared by Jon Dienst, PE
cc: Jenny Larson, Budget Director
Don Vogt, Public Works Director
Bob Green, Water Department Manager
Bob Schiesl, Assistant City Engineer
RESOLUTION 368-09
APPROVAL OF PLANS, SPECIFICATIONS, FORM OF CONTRACT, AND
ESTIMATED COST FOR THE HEEB STREET RETAING WALL
RECONSTRUCTION PROJECT
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY
OF DUBUQUE, IOWA:
That the proposed plans, specifications, form of contract and estimated cost for
the Heeb Street Retaining Wall Reconstruction Project, in the estimated amount
$178,869.45, are hereby approved.
Passed, approved and adopted this 21St day of September, 2009.
Jo c E Connors, Mayor Pro-Tem
Attest:
Jeanne F. Schneider, CMC, City Clerk