Lake Park North Lion Bridge RehabilitationMilwaukee, Wisconsin

Darrell Berry, PE, SE

Approaches to Historic Bridge Rehabilitation

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Lake Park North Lion Bridge Steel arch with concrete deck

Originally built in 1896, narrowed in the 1960s

Length: 90 feet; Width: 10 feet clear Single span steel arch Design Live Load: 85 psf or 15,000 lb.

vehicle

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North Lion Bridge

Lake Michigan

2Milwaukee, Wisconsin

Lake Park North Lion Bridge Rehabilitation

Owner: Milwaukee County Department of Parks, Recreation and Culture

Design Engineer: Mead & Hunt, Inc.

General Contractor: Vista Design & Construction, LLC

Project Cost: $1.6 Million

Project dates: started Feb 2009,

completed Oct 2009.

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Significant Issues Associated With Project

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1. Arch Structure

2. Railing

3. Stone Facing on Abutments

4. Lion Statues

1. Steel arch structure, including bearings & concrete deck

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How Arch Issue Was Resolved

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Deteriorated structural steel was removed and replaced, with details matching original.

Bearings were removed and replaced.

Concrete deck was removed and replaced Precast concrete panels Cast-in-place concrete surface

2. Metal Railings

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How Railing Issue Was Resolved

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Railings were removed from bridge and delivered to a fabrication shop.

New finials were added and made larger to fill the openings.

Edges were welded to uprights.

Railings were painted and reinstalled.

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3. Stone facing on abutments

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How Stone Facing Issue Was Resolved

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Missing stones were replaced with matching stones.

Entire abutments were tuckpointed, with color to match existing.

All surfaces were gently cleaned to remove moss and dirt.

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4. Lion Statues

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How Lion Statue Issue Was Resolved

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110 year old statues were in good condition with minimal graffiti.

Cleaning used a gentle process with water and light power wash.

Digital 3D image will be prepared in near future.

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Lessons Learned/Conclusions Rehabilitated bridge is part of beloved, historic park.

Bridge and lion statues are enduring symbols of a celebrated Milwaukee landmark.

Cooperation and collaboration between all parties lead to an extremely successful, award-winning project.

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