Seventh Street Retaining Wall Emergency Repairs AuthorizationMasterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: 7th Street Retaining Wall Emergency Repairs
DATE: September 29, 2011
Dubuque
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AI- America City
2007
City Engineer Gus Psihoyos recommends City Council authorization to do emergency
repairs to the 7th Street Retaining Wall.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
Michael C. Van Milligen
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Attachment
cc: Barry Lindahl, City Attorney
Cindy Steinhauser, Assistant City Manager
Gus Psihoyos, City Engineer
Masterpiece on the Mississippi
Dubuque
All-Ankrica City
2007
TO: Michael C. Van Milligen, City Manager
FROM: ) Gus Psihoyos, City Engineer _ c 5,
SUBJECT: 7th Street Retaining Wall Emergency Repairs
DATE: September 27, 2011
INTRODUCTION
This memorandum requests the City Council to authorize emergency repairs to the
public retaining wall along 7th Street and the associated street pavement.
DISCUSSION
There is a City concrete retaining wall that supports the north side of West 7th Street,
between Hill Street and Needham Place. In spring, 2011, this wall partially collapsed as
a result of heavy rains. For public safety and welfare, Engineering staff partially closed
the corridor and hired Drew Cook & Sons Excavating to remove a portion of the wall.
The Building Services Department advised the abutting property owner at 706 Hill
Street not to use to its garage in case of further wall failure.
IIW, P.C. (IIW) was retained by the City of Dubuque to provide structural engineering
design and analysis of the retaining wall. It is IIW's recommendation that a portion of the
concrete retaining wall be reconstructed from approximately 30 feet northeasterly of the
failing section to a point where a satisfactory connection can be made to the existing
wall near the City stairway that connects 7th Street to Hill Street. (Note letter
attachment.)
Engineering is proposing to bid the project which includes: reconstruction of the
retaining wall; resurfacing of 7th Street in the area of the wall; replacement of the curb
and gutter along this repair; and the replacement of the cable guardrail with a barrier rail
along the retaining wall. It would be the intent to complete this work by year -end, with
weather permitting.
IIW would continue to be involved in the design, development, and construction phases
of the project.
BUDGET IMPACT
IIW estimates that the wall and associated street pavement repair will be $450,000.
Currently, the City has a Stone Retaining Walls Capital Improvement Project Fund
(3501029), with a balance of $122,633.84. It should be noted that a portion of the Stone
Retaining Walls CIP will be required for the Madison Street Retaining Wall Project.
The remaining funding would come from the following approved FY12 capital
improvement projects: Sunset Ridge Reconstruction (3002141) and Sunset Ridge
Sanitary (7101801), Central Avenue Pavement Rehab (21st to 32 "d) (3002248),
Guardrail Replacement (3001027), Curb & Catch Basin Replacement (1021041) and
Cedar Cross Road Lighting (3002326).
FUNDING
SOURCE
Sunset Ridge Reconstruction Savings
Sunset Ridge Sanitary Savings
Central Avenue Pavement Rehab (21st
to 32nd) Savings
Guardrail Replacement
Curb & Catch Basin Replacement
Stone Retaining Walls
Cedar Cross Road Lighting
ACTION TO BE TAKEN
CURRENT FUNDING NEEDED
BALANCE FOR WALL
$ 50,000.00 $ 50,000.00
$ 50,000.00 $ 50,000.00
$ 75,000.00 $ 75,000.00
$ 66,000.00 $ 66,000.00
$ 159,862.00 $ 75,000.00
$ 122,633.84 $ 50,000.00
$100,000.00 $84,000.00
TOTAL $450,000.00
The Engineering Department requests the City Council to authorize the emergency
repairs of the rn Street Retaining Wall and associated street pavement in the interest of
public safety and welfare through adoption of the attached resolution.
Prepared by Jon Dienst, PE
cc: Barry Lindahl, City Attorney
Bob Schiesl, Assistant City Engineer
Dennis Waugh, IIW, PC
Brad Mootz, IIW, PC
2
September 22, 2011
Gus Psihoyos
City of Dubuque - Engineering Department
50 West 13th Street
Dubuque, IA 52001
Re: 7th Street Retaining Wall
IIW Project No: 11096 -01
Dear Mr. Psihoyos:
We have observed the condition of the existing cast -in -place concrete retaining wall parallel to 7th
Street near the intersection of Needham Place, a portion of which has already failed and been
removed. This wall is still currently endangering adjacent property, including a public sidewalk and
private residences on Hill Street. Since it also supports a street that is a principal access to several
properties that is currently partially closed, restoring the use of this street is essential for public
safety, especially emergency vehicle access. Considering the recent heavy rains, it is necessary to
replace this wall immediately because of the imminently dangerous conditions.
Pursuant to the Emergency Work provisions of Section 384.103 of the Code of Iowa, I hereby certify
that this is necessary work for this public improvement and that delay of advertising and public
letting might cause serious loss or injury to the City and public safety.
I hereby certify that this engineering document was prepared by me and that I am a duly licensed
Professional Engineer under the laws of the State of Iowa.
Sincerely,
IIW, P.C.
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J`f E S S/ O if4 `eP•••• •4'9
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Bradley J. Mootz, P.E.
Iowa Reg. No. 18076, renewal 12/31/2011
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MOOTZ ;,n
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11W, P.C.
www.iiwengr.com
ARCHITECTURE
CIVIL ENGINEERING
CONSTRUCTION SERVICES
ENVIRONMENTAL ENGINEERING
LAND SURVEYING
MUNICIPAL ENGINEERING
STRUCTURAL ENGINEERING
TRANSPORTATION ENGINEERING
Dennis F. Waugh, PE/SE*
Charles A. Cate, PE **
Gary D. Sejkora, PE
Michael A. Jansen, PE /SE
Ronald A. Balmer, PE/SE/AIA
John M. Tranmer, PLS
Timothy J. Tranel, PE*
John F. Wandsnider, PE
Julie P. Neebel, PE
James P. Kaune, PE
Thomas J. Oster, PLS **
Wray A. Childers, PLS
Geoffry T. Blandin, PE
Mark C. Jobgen, PE
Lauren N. Ray, PE /SE*
Bradley J. Mootz, PE /SE
Cody T. Austin, PE*
Marc D. Ruden, PE
Mark R. Fassbinder, AIA*
Michael A. Ruden, NCARB/AIA*
Alice M. Ohrtmann, PE
Craig J. Elskamp, AIA
Robert W. Blok, PE
Eric J. Helminiak, PE /SE*
Steven J. Hunn, PE
Jeff J. Brandt, PLS
* LEED AP
** Retired
4155 Pennsylvania Avenue, Dubuque, IA 52002 -2628 • [P] 563.556.2464/800.556.4491 • [F] 563.556.7811
ENGINEERS. ARCHITECTS. SURVEYORS.
jiw
RESOLUTION NO. 328 -11
RESOLUTION AUTHORIZING EMERGENCY REPAIRS TO THE RETAINING WALL ON 7TH
STREET AND ASSOCIATED STREET PAVEMENT
Whereas, a public retaining wall adjacent to 7th Street has failed and has damaged the
pavement on 71h Street as the result of the wall failure; and
Whereas, Iowa Code § 384.103 provides that when emergency repair of a public
improvement is necessary and the delay of advertising and a public letting might cause serious
loss or injury to the city, the governing body shall, by resolution, make a finding of the necessity
to institute emergency proceedings and shall procure a certificate from a competent registered
professional engineer or architect, not in the regular employ of the city, certifying that
emergency repairs are necessary, and that in that event the governing body may contract for
emergency repairs without holding a public hearing and advertising for bids; and
Whereas, Iowa Code § 364.12(3)(c) provides that a city may require the removal, repair,
or dismantling of a dangerous structure and if the property owner does not perform the action, in
an emergency a city may perform the action and assess the costs to the property owner.
Whereas, the City Council finds that the condition of the retaining wall is a dangerous
structure and constitutes an emergency and that an emergency repair of the retaining wall and
adjoining public street supported by the retaining wall is necessary and the delay of advertising
and a public letting might cause serious Toss or injury to the city; and
Whereas, the City has procured a certificate from a competent professional engineer
registered in the State of Iowa, not in the regular employ of the City, certifying that emergency
repairs to the retaining wall and street are necessary.
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF
DUBUQUE, IOWA:
Section 1. The City Council finds that it is necessary to institute emergency proceedings
to repair the retaining wall along 7'h Street including the associated street pavement portion.
Section 2. The City Manager is hereby authorized to proceed with instituting such
emergency repairs as provided by law.
Passed, adopted and approved this 3rd day of October 2011.
Attest:
Kevi - Firnsta , City Clerk
D
Roy D. Buol, Mayor