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Fengler St Bridge ReconstructMEMORANDUM February 28,2002 TO: FROM: SUBJECT: The Honorable Mayor and City Council Members Michael C. Van Milligen, City Manager Fengler Street Bridge Reconstruction Project Public Works Director Mike Koch is recommending a public hearing be scheduled for April 1, 2002, to consider the Fengler Street Bridge Reconstruction Project. concur with the recommendation and respectfully request Mayor and City Council Michael C. Vah Milligen MCVM/jh Attachment cc: Barry Lindahl, Corporation Counsel Cindy Steinhauser, Assistant City Manager Michael A. Koch, Public Works Director TO: FROM: SUBJECT: CITY OF DUBUQUE, IOWA MEMORANDUM February 26, 2002 Michael C. Van Milligen, City Manager Michael A. Koch, Public Works Director Fengler Street Bridge Reconstruction Project INTRODUCTION The enclosed resolutions authorize the public bidding procedure for the Fengler Street Bridge Reconstruction Project. BACKGROUND The Fengler Street Bddge was closed in August of 2001 after an inspection by City staff and IIW Engineers & Surveyors, P.C., observed an accelerated deterioration of the bridge deck and support columns. Large sections of the underside of the concrete deck had fallen from the bridge onto the railroad tracks below. With sections of the bridge deck in extremely poor condition, it was possible that a heavy load could cause additional damage to the deck, making it unsafe for traffic. For these reasons and in the interest of public safety, the bddge was immediately closed. Since the Fengler Street Bridge is such a vital connection to the Kerper Peninsula, and it's closure effects emergency response time to the area, a priodty was placed on the timely reconstruction of the bridge. Therefore, IIW Engineers was immediately retained to provide the engineering design services to get the bridge back open to traffic as quickly as possible. BRIDGE DECK DETERIORATION ANALYSIS Due to the excessive and unusual deterioration of the existing concrete bridge deck directly above the railroad mainline, staff had a full-depth section of the concrete deck removed and sent to Construction Technology Laboratories, Inc., which performed a petrographic examination and chemical analysis of the deck sample. The lab found localized deterioration and spalling of the concrete, which was likely instigated by expansive corrosion of the embedded reinforcing steel which was promoted by penetration of moisture and high levels of chlorides that migrated through vertical cracks in the bridge deck. The vertical cracks in the bridge deck were opened due to accelerated cyclic freezing and thawing of the concrete deck directly above the mainline train track and subjected to the heat of the locomotive engine exhaust. Other factors which potentially contributed to the premature deterioration of the original concrete deck included a moderate water-cement ratio with Iow levels of air content (estimated 2% - 5%) which was likely insufficient to protect the concrete from damaging freeze-thaw cycles. The asphalt overlay, which was added to the bridge deck in the late 1970's, may have been also a contributing factor to the continued deterioration of he existing bridge. MITIGATION MEASURES Based upon the results of the examination and analysis of the deck sample, the findings have been incorporated in the new concrete bridge design to prevent similar future deterioration conditions. The new bridge will be constructed with improved methods and materials including; epoxy coated reinforcing steel in the bridge deck and support columns; the inclusion of a slag admixture in the concrete mix design which will make the bridge deck more impermeable to chlodde penetration; and the construction of air vents between the bridge deck and support beams which will aide in ventilating the underside of the bridge and dissipate the heat of the locomotive engine exhaust. DISCUSSION The Fengler Street Bridge is in such poor condition that it would not be cost effective to continue with spot repairs or perform some type of deck or pier retrofit repair project. Based on this evaluation, staff is proposing to completely demolish and remove the existing bridge deck, beams, and piers. The majority of the original pilings has been incorporated into the new design. A new pretensioned-prestressed concrete beam bridge will be built in the same location. An exhibit drawing is attached which shows an overhead view of the new bridge. The new concrete structure will be constructed to current roadway and bridge geometry design standards, including a wider 34-foot bridge roadway with an 8-inch thick concrete deck. The bridge piers and abutment supports will be reconstructed in the approximate same locations. The new bridge as proposed would have 5-foot sidewalks on each side of the bridge with pedestrian sidewalks installed on both sides of the approach roadway, which will match into both bridge sidewalks. Due to the steep side slopes at each roadway approach section to the bridge, the outside edge of the sidewalks on grade will require the installation of a pedestrian railing. The City's standard ornamental hoop railing will be used along these sections. Additionally, due to the steep side slopes at each roadway approach section to the bridge, the design will include a concrete vehicular barrier rail, which will extend beyond the bridge towards both Kerper and Garfield. The existing asphalt roadway approach pavement will be removed and reconstructed with a concrete pavement, which will match into Garfield and the newly-paved Kerper-Fengler intersection. The substructure of the bridge has been designed to comply with both the horizontal and vertical clearance requirements of the railroad. Because of limited lateral clearance to the railroad tracks, the railroad is requiring that the bridge piers be constructed with crash walls, which have been incorporated into the new structure design while utilizing as much of the salvaged footing and pile foundation as possible. ARCHITECTURAL ESTHETIC FEATURES Other design components that are proposed for the Fengler Street Bridge include adding several amhitectural esthetic features to the new structure which include; incorporating buff colored concrete to the vehicular barrier rail; installing buff colored decorative concrete balustrade railings on the outside of both bridge sidewalks; and installing six ornamental lighting fixtures to the bridge. A drawing is attached which shows the proposed decorative railing and lighting fixtures. PROJECT SCHEDULE The schedule for the project will be as follows: Initiate Bidding Process Advertise for Bids Receipt of Bids Notice of Public Hearing on Plans and Specifications Public Hearing Award of Construction Contract Early Completion Date Late Completion Date March 4, 2002 March 8, 2002 March 20, 2002 March 22, 2002 April1,2002 April1,2002 June 15,2002 June 30,2002 PROJECT COMPLETION INCENTIVE Since the Fengler Street Bridge is such essential link to the Kerper Peninsula, staff is recommending that an early completion incentive be included in the project. Should the project be completed prior to the specified eady completion date of June 15, 2002, staff is proposing a $3,000 bonus per calendar day, to a maximum of $50,000. Conversely, should the project not be completed by the specified late completion date of June 30, 2002, liquidated damages in the amount of $3,000 per calendar day will be imposed. RAILROAD COORDINATION The project will require extensive and continued communication and coordination with the railroad, I&M Rail Link. Staff is currently working with the railroad to develop a project agreement, which will allow construction operations to take place within the railroad right-of- way. The railroad will also require that a railroad employee (flagger) be on-site during construction to coordinate train schedules and site safety with the bridge contractor. Staff is proposing that the City hire the railroad flagger directly, which would eliminate this unpredictable cost item to the bridge contractor. Staff estimates the cost of the railroad personnel on-site during construction to be approximately $15,000. RECOMMENDATION I would recommend that the City Council establish the date for the public hearing, and authorize the City Clerk to advertise for proposals. BUDGET IMPACT The construction cost estimate for the Fengler Street Bridge Reconstruction Project is as follows: Bridge Construction Contingency (10%) Engineering Design Services Construction Engineering Inspection Railroad Flagger Services Potential Incentive $998,818 99,881 42,000 25,000 15,000 50,000 Total Construction Estimate $'1,230,699 The project-funding summary is as follows: Fengler Street Bridge CIP Algona Street Surplus Bridge Repair and Maintenance Total Construction Funding $845,565 369,320 15,814 $1,230,699 The project will be funded from the Street Construction Fund under the Capital Improvement Budget for the Fengler Street Bridge in the amount of $845,565 for Fiscal Year 2002. Additional funding will be from the remaining balance from the Algona Street Reconstruction Project of $369,320, and $15,814 from the Fiscal Year 2002 appropriation for General Bridge Repair and Maintenance. ACTION TO BE TAKEN The City Council is requested to establish the date for the public hearing, give preliminary approval of the plans and specifications and authorize the City Clerk to advertise for proposals through adoption of the enclosed resolutions. Prepared by Robert Schiesl, P.E., Civil Engineer cc: Pauline Joyce, Administrative Services Manager Dennis Waugh, IIW Engineers & Surveyors RESOLUTION NO. 134-02 PRELIMINARY APPROVAL OF PLANS AND SPECIFICATIONS NOW THEREFORE, BE tT RESOLVED BY THE CITY COUNCIL OF THE CITY OF DUBUQUE, IOWA: That the proposed plans, specifications, form of contract and estimated cost for the Fengler Street Bridge Reconstruction Project, in the estimated amount of $1,230,699, are hereby approved and ordered filed in the office of the City Clerk for public inspection. Passed, adopted and approved this 4th day of March ,2002. Terrance M. Duggan, Mayor Attest: 'Jeanne F. Schneider, City Clerk RESOLUTION NO. 135-02 FIXING DATE OF HEARING ON PLANS AND SPECIFICATIONS Whereas, the City Council of the City of Dubuque, Iowa has given its preliminary approval on the proposed plans, specifications, and form of contract and placed same on file in the office of the City Clerk for public inspection of the Fengler Street Bridge Reconstruction Project. NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF DUBUQUE, IOWA: That on the 1~t day of April, 2002, a public hearing will be held at 6:30 p.m. in the Public Library Auditorium at which time interested persons may appear and be heard for or against the proposed plans and specifications, form of contract and cost of said improvement, and the City Clerk be and is hereby directed to cause a notice of time and place of such hearing to be published in a newspaper having general circulation in the City of Dubuque, Iowa, which notice shall be not less than four days nor more than twenty days prior to the day fixed for its consideration. At the hearing, any interested person may appear and file objections to the proposed plans, specifications, contract, or estimated cost of the improvement. Passed, adopted and approved this 4th day of March, ,2002. Attest: Jeanne F. Schneider, City cler'k Terrance M. Duggan, Mayor RESOLUTION NO.136-02 ORDERING BIDS NOW THEREFORE, BE IT RESOLVED BY THE COUNCIL OF THE CITY OF DUBUQUE, IOWA: That the Fengler Street Bridge Reconstruction Project is hereby ordered to be advertised for bids for construction. BE IT FURTHER RESOLVED, that the amount of the security to accompany each bid shall be in an amount which shall conform to the provisions of the notice to bidders hereby approved as a part of the plans and specifications heretofore adopted. That the City Clerk is hereby directed to advertise for bids for the construction of the improvements herein provided, to be published in a newspaper having general circulation in the City of Dubuque, Iowa, which notice shall not be less than four days nor more than forty-five days prior to the receipt of said bids at 2:00 p.m. on the 20~ day of March, 2002. Bids shall be opened and read by the City Clerk at said time and will be submitted to the Council for final action at 6:30 p.m. on the 1s' day of April, 2002. Passed, adopted and approved this 4th day of March, 2002. Terrance M. Duggan, Mayor Attest: Jeanne F. Schneider, City Clerk day of March ,2002. Prepared by: Michael A. Koch, Public Works Director, City of Dubuque, 50 W. 13th Street, Dubuque, Iowa (563) 589-4270 NOTICE OF HEARING ON PLANS AND SPECIFICATIONS Notice of public headng on proposed plans and specifications, proposed form of contract and estimate of cost for the Fengler Street Bridge Reconstruction Project. NOTICE IS HEREBY GIVEN: The City Council of Dubuque, Iowa will hold a public headng on the proposed plans, specifications, form of contract and estimate of cost for the Fengler Street Bddge Reconstruction Project, in accordance with the provisions of Chapter 384, City Code of Iowa, at 6:30 p.m. on the 1~ day of April, 2002, in the Public Library Auditorium, 360 West 11th Street, in Dubuque, Iowa. Said proposed plans, specifications, form of contract and estimate of cost are now on file in the office of the City Clerk. At said hearing any interested person may appear and file objections thereto or to the cost of the improvements. Any visual or hearing-impaired persons needing special assistance or persons with special accessibility needs should contact the City Clerk's office at (563) 589-4120 or TDD at (563) 589-4193 in the Human Rights Department at least 48 hours prior to the meeting. Published by order of the City Council given on the 2002. day of Jeanne F. Schneider, City Clerk