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2015WinterShotcreteEMag

2014 Outstanding Repair & Rehabilitation Project The 606-Bloomingdale Trail | Viaduct Repairs By Kevin Doyle LBloomingdale Line, originally constructed in Bloomingdale Trail is named for the street right-Trail. “The 606” gets its name from the zip codeprefix, 606, which all Chicagoans share; theocated on the northwest side of Chicago,IL, the abandoned railway known as the 1873, runs east and west through four dense of-way where the trail is located. The proposal neighborhoods including Bucktown, Logan encompassed structural concrete repair and rehab- Square, Wicker Park, and Humboldt Park. The ilitation work of 36 concrete bridges and retaining line starts at the Kennedy expressway, just north walls, landscaping, bridge deck waterproofing, of the loop, half way between Wrigley Field and new bridge construction, decorative guardrail, new US Cellular Field, and heads west for 2.67 miles lighting and security cameras, the creation of new (4.29 km). The line was built shortly after the parks, and installation of numerous access ramps Chicago fire in 1871 by Chicago and Pacific along the length of the trail. Railroad to connect outlying rail ports to the The project was let out to bid early May 2013, Chicago River and to help support the city’s bid late in May 2013, and awarded shortly there- expanding industrial sector. Due to a high number after, demonstrating the urgency the City had to of accidents involving trains and residents all over get this project under way. American Concrete the city in the late 1800s, the city passed an ordi- Restorations (ACR) was contracted to repair the nance mandating that all rail lines in the city be bridges and retaining walls following the Chicago elevated and, in 1910, the Bloomingdale Line was Department of Transportation Structural Repair of raised to 15 ft (4.6 m) above street level. Concrete Specification, which gives the contractor Use of the line greatly reduced in the 1980s a choice of formed concrete repair or shotcrete. and train service was eventually rerouted to other Due to the need for extensive coordination with rail lines. By the mid-1990s, all rail activity the surrounding communities, ACR was finally ceased, creating an ideal platform for an elevated called upon to begin work in late October 2013. rails-to-trails conversion. The out-of-service rail With frost already present and frigid cold line was largely left alone and reclaimed by temperatures soon to be upon Chicagoland, ACR wildlife and plants. The idea for “The 606” has devised a plan to keep the project moving forward its origins in the CitySpace Plan of 1998, which through the winter months. This plan consisted showed the Logan Square community area did of performing the necessary concrete removals at not meet minimum standards for open space per the bridge locations followed by fully enclosing capita. In fact, of the 77 community areas, it and heating the structures for shotcrete work to ranked second to last at 99 acres (40 ha) deficient proceed. Along with a late start in the year and for the population. In 2004, the City of Chicago the cold weather setting in quickly, this project adopted the Logan Square Open Space Plan, had a variety of obstacles, including access into which helped identify ways to increase open heavily congested neighborhoods and residents’ space to achieve the minimum standards. The properties, repairs during limited closures of main Bloomingdale Line was called out as a way to thoroughfares, and a structure that was in much provide open space in an otherwise dense and worse shape than originally anticipated (Fig. 1). built-out community. The City of Chicago and the Chicago Park Shotcrete Segment of District, with the support of local residents and The Trust for Public Land, proposed to officially Project Overview repurpose the elevated tracks into a 2.67 mile The shotcrete portion of “The 606” was located (4.29 km) long recreational trail for biking, run- at each of the 36 bridges and also the retaining ning, and walking. “The 606” refers to the park walls and caps that spanned the 2.67 miles and trail system that is currently under construc- (4.29 km) of the project on the north and south tion, the centerpiece of which is the Bloomingdale sides of the trail. Work at the bridge locations 30 Shotcrete • Winter 2015


2015WinterShotcreteEMag
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