KanesvillePedBridge.pdf

7/29/2019 KanesvillePedBridge.pdf

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Kanesville Pedestrian Bridge Maintenance and RepairACEC of Iowa 2010 Engineering Excellence Award

CITY OF COUNCIL BLUFFS, IOWA

KANESVILLE PEDESTRIAN BRIDGE

MAINTENANCE AND REPAIR

Table of Contents:

1. ACEC Entry Form

2. Client Release Letter

3. Project Photographs

4. Written Documentation

A. Project Description

B. Role of Snyder & Associates, Inc.

C. Role of Other Engineers or ArchitectsD. Criteria A: Original or Innovative Application of New or

Existing Techniques

E. Criteria B: Future Value to the Engineering Profession and

Perception by the Public

F. Criteria C: Social, Economic, and Sustainable Design

Considerations

G. Criteria D: Complexity

H. Criteria E: Exceeding Client/Owner Needs

I. Project Press Release


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Section 2. Client Release Letter


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Section 3. Project Overview Photographs

Before: Existing Kanesville Pedestrian Bridge at South Approach

After: Completed South Approach


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Before: Steel Bridge Deck

After: New Concrete Deck with Cross Slope Drainage


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Before: Existing Fence at the North Approach

After: PVC-Coated Chain-link Fabric with Polymer Coated Fence Posts and SecondHandrail Installed


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Before: Existing Paint

After: Final Coat of Chemical-Resistant Urethane Pain


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Section 4a. Project Description

City of Council Bluffs Kanesville Pedestrian Bridge Maintenance and Repair

The bridge is near the intersection of Kanesville Blvd/US Highway 6 and Ridge Street

in Council Bluffs. The bridge extends over one of the main thoroughfares for vehiclesentering and leaving the city from the northeast. It helps provide a safe access route

to nearby schools, hospitals and businesses

The existing bridge is a thru plate girder style structure supported on five concrete-

encased steel H pile piers. The floor is supported by four angle iron stringers which

bear on floor beams constructed of rolled-steel I beam shapes. The floor beams carry

the loading to the two plate girder sections.

There were a number of issues with the existing condition of the bridge. The bridge

deck was in need of serious repair due to many years of poor drainage and the

corrosive effects of chemicals applied to the steel deck during the winter months.

Graffiti removal had caused the existing paint to begin losing its adhesive qualities

allowing moisture to come in contact with the steel, which caused further corrosion to

the deck angles supporting the walkway. A white anti-graffiti substance had been

applied to the interior girders in the past but was removed during normal

maintenance. The existing safety fence was stretched and sagging and was not

aesthetically pleasing.

Beginning in 2005, various alternatives were considered and rejected. Removing the

existing bridge and installing a crosswalk was determined to not be feasible due to its

location across a major highway. Another alternative included replacing the existingsteel deck with a new steel deck, installing a deck drainage system, sandblasting to

remove existing paint, repainting, and adding lighted signs. This alternative was

rejected due to a limited budget. Replacing the existing structure with a new bridge

wasnt feasible due to the same budget constraints.

The major budget aspect of any bridge renovation alternative was the bridge deck

reconstruction. Snyder & Associates determined the most innovative and cost

effective solution was to incorporate a composite deck system commonly used in

building construction, but not typically applied in this type of situation. Construction

work also needed to coincide with the Council Bluffs Public School 2009 summer

break so as to not interfere with the safe route to school.

The funding for this project was provided by the City of Council Bluffs, The Iowa West

Foundation and the J ennie Edmundson Memorial Hospital Foundation.


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Existing Kanesville Pedestrian Bridge

South Approach with Existing Fencing


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Existing Cage Fencing and Anti-Graffiti Paint on Girder Interior

South Approach Bridge Connection to Abutment


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North Approach with Graffiti

Bridge Deck Angles with Deterioration


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Corroded and Loose Deck Angles below Deck

Corroded Existing Deck Failing Along Edges of Main Girder


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Section 4b. Role of Snyder & Associates, Inc.

The City of Council Bluffs selected Snyder & Associates, Inc. in 2005 to perform the

engineering services for the project. Snyder & Associates, Inc. responsibilities

included:

Preliminary survey.

Bridge design alternatives.

Staging construction to maintain local traffic across the project corridor.

Coordination with the City of Council Bluffs and adjacent business owners to

facilitate construction activities.

Final design, plan production, technical specifications, and contract

documents.

Project quantities and cost opinions.

Construction administration and observation.

The Kanesville Pedestrian Bridge Maintenance Repair Design & Construction Team:

Project Manager: Michael Geier

Project Engineer: Nick Kauffman, P.E.

Project Technician/Construction Observation:William Hall


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Section 4c. Role of Others

Architectural

Chroma Design Inc., a Boulder, CO firm specializing in landscape architecture, urban

design, and bridge aesthetics prepared the aesthetic design concept and detaildrawings and specifications for this project. Items designed and detailed by Chroma

Design include: signs, bridge rails, fencing, and paint color. Chroma Design

performed this work under separate contract with The Iowa West Foundation that

funded 35% of the construction cost.

Contractors

Andersen Construction Company Prime Contractor, Structural

Woerner Wire Works Structural and Miscellaneous Steel Supplier

Larsen Concrete Construction Structural Paving

American Fence Fencing

Abstract Painting Painting and Surface Prep

Neon of Omaha - Signage


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Section 4d. Judging Criteria A.

Original or Innovative Application of New or Existing Techniques

The City of Council Bluffs was in need of a cost effective solution to address the

ongoing maintenance, corrosion, deterioration, and safety issues associated with theexisting steel bridge deck. Stay-in-place galvanized steel deck forms have been

used extensively in the building industry for many years. This non-typical application

of the forms was used as an overlay on the existing steel deck to help minimize the

costs of removal and modification of the pedestrian bridge. The decking fit between

the existing girders and stiffeners, allowing the contractor to simply trim and fit the

integral pour-stop/drip edge between the stiffeners. A crowned deck profile helps

achieve positive drainage and will help minimize past drainage issues. The new

reinforced concrete deck provides a safer walking surface and a typical sidewalk

winter maintenance program.

The application of the forms over the existing deck allowed traffic on the major

thoroughfare to continue with minimal interruption or delays during the renovation

project.

Corrugated Steel Being Laid over the Existing Steel Deck and Reconstructed Steel

Supports on the Approach


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North Approach Existing Transverse Floor Beams Replaced Prior to Overlaying theCorrugated Forms

New Galvanized Corrugated Decking in Place on North Approach


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Concrete Being Pumped to the Main Span Deck


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Section 4e. Judging Criteria B.

Future Value to the Engineering Profession and Perception by the Public In the current economic environment, cost-effective improvements using innovative

techniques and materials demonstrate how governments and design professionalscan work together to find practical solutions to aging infrastructure challenges facing

municipalities. This decking solution provided a significant improvement to an

existing structure without a large capital investment from the citizens of Council

Bluffs.

South Approach Concrete Finish Work


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Section 4f. Judging Criteria C.

Social, Economic, and Sustainable Design Considerations

The renovation project was created to not only resolve the physical deterioration of

the bridge, but also the visual deterioration and issues associated with that. Theneglected look of the Kanesville Pedestrian Bridge helped set the stage to create a

target for ongoing graffiti. The sagging chain-link caged-style fencing compounded

the problem and was failing to promote the bridge as a crucial asset of the City.

The new warm-colored urethane paint system allows the City to remove the graffiti

with minimal effort. The black-coated open fencing is a modern and aesthetically

pleasing look, as well as a very functional and safety concise system. ADA compliant

handrails were installed utilizing the existing mounting brackets already in place. The

new concrete deck provides a safe and comfortable pedestrian corridor as opposed

the uneven steel plate deck previously on the surface.

The bridge no longer looks like a dated institutional corridor and now is both a

functional and visual asset to the City. The Citys pride in the project is exemplified

by the placement of the City logo above the traffic lanes below.

A new look at construction methods gave the City the opportunity to improve upon an

existing design and foundation, rather than dismantle the bridge and invest in a new

structure. This is a concept that the City can carry to future projects, and look at new

methods, that may have been previously overlooked, to renovate and rehabilitate

existing infrastructure.


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New Omega Fence Panels in Place on Main Span

Preparing to Install the New Sign on the Bridge


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Section 4g. Judging Criteria D.

Complexity

The project goal was to replace the existing deck and provide aesthetic

improvements to the structure, extending the targeted service life to 15 years with theimprovements. The project itself was not a complex one; however the complexity lied

within the budget constraints available for the project. A larger budget would have

allowed the City to consider more alternatives. Once the standard alternatives were

explored and rejected for budget reasons, additional meetings and work sessions

were utilized to explore non-traditional methods to accomplish the project goal.

Utilizing non-traditional methods also required further research to ensure that the use

of those methods were sound, safe, and met all applicable requirements.

North Approach with Welded Wire Fabric Sheets in Place Prior to ConcretePlacement


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Section 4h. Judging Criteria E.

Exceeding Client/Owner Needs

The budget-concise solution to the decking aspect of the project met both the Citys

budget and target service life criteria. Had it not been for an innovative solution tocreate a new bridge decking surface, the project may not have continued as planned.

Construction began after the Council Bluffs School District spring dismissal and was

completed on time before the beginning of the follow school year.

The City and The Iowa West Foundation partnered to fund the project. The overall

budget for the project was $300,000. Six bids were received, with the two lowest

bids separated by less than 3%. The lowest bid was in the amount of $278,622.34

(including Alternates). Final project costs with change orders was $288,684.44.

Engineers Estimate for the project (including Alternates) was $307,332.75.

City of Council Bluffs Sign Proudly Displayed on the Renovated Bridge


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Kanesville Pedestrian Bridge Maintenance and Repair

Section 4i. Project Press Release

For Immediate Release

The American Council of Engineering Companies of Iowa (ACEC) has awarded a

2010 Engineering Excellence Award to Snyder & Associates, Inc. of Council Bluffs,Iowa and the City of Council Bluffs. The project included the renovation and repair of

the Kanesville Pedestrian Bridge.

The Kanesville Pedestrian Bridge project utilized a common building construction

practice in a non-typical way to fulfill the needs and budget requirements of the City.

Galvanized, corrugated stay-in-place steel forms were used to create an overlay on

the existing warped steel bridge deck. The construction methods utilized allowed

traffic to flow under the project with minimal interruption.

The enhancements to the faade and fencing system provided both aesthetic and

functional enhancements. The urethane paint system provides a surface that is

durable under harsh weather conditions and easier to maintain and clean. The black,

open fencing design is less restrictive from a visual perspective, but still provides all

the safety requirements needed for the bridge span over the busy road below.

The project was selected for recognition from a field of innovative projects designed

by engineering firms throughout Iowa. J udging took into account the originality and

innovation of the projects; the future value to the engineering profession; social,

economic, and sustainable design considerations; complexity; and the projects

conformance to the needs of the client.

Snyder & Associates, Inc., was established in 1977 and has over 200 employees

operating out of offices in Ankeny, Atlantic, Cedar Rapids, Council Bluffs, and Des

Moines, Iowa, as well as Maryville and St. J oseph, Missouri. The firm has experience

in several disciplines including traffic and transportation, structural, environmental,

municipal engineering, land development, community and regional planning,

renewable energy, surveying, construction services, GIS, and graphic design.

Documents

KanesvillePedBridge.pdf