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Yesterday, the Chicago Transit Board amended a design/build contract for the North Red Line Station improvement project to address additional slow zones, viaduct and other structure repairs.

The amendment, which has a maximum value of $15 million, was approved in an effort to reduce future expenses and avoid additional impacts to rail service, Chicago Transit Authority (CTA) officials said in a prepared statement.

The original contract anticipated potential additions based on the evolving design work, and allowed additional work and funds to be added up to the 40 percent completion point, which the contractor expects to reach by September.

According to the amendment terms, the existing scope of the work will be extended to include:

•    repairs and replacement of 7,000 feet of deteriorated track and rail at the Lawrence, Granville and Jarvis stations, as well as portions of track between the Berwyn and Thorndale, and the Granville and Loyola stations;
•    waterproofing and track renewal work between the Loyola and Morse stations;
•    structural and cosmetic repairs of viaducts at Pratt and Lawrence; and
•    additional station structural, communication and finishing work.

The project additions will not alter the current project timeline and completion dates, officials said. Work requiring the closure of the seven stations is expected to be completed by year’s end, with all remaining station and track work to be completed by early 2013.

Kiewit Infrastructure Co. was awarded the original $57.4 million contract.