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January 8 2022
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Vol. XVI • No. 1
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Taylor LeTourneau photo
Secant piles are being drilled at Vine Street.
By Cindy Riley CEG CORRESPONDENT
In Columbus, Ohio, work is under way on a $267 million project known as the Lower Olentangy Tunnel (LOT). Construction began on site in April 2021, with a scheduled completion date of December 2026. “The city is under two Ohio Environmental Protection Agency [OEPA] consent orders to improve water quality and reduce the potential for human contact with waterborne pollutants by reducing overflows
from the sewer system into creeks and rivers during wet weather events,” said Jeremy Cawley, city of Columbus project manager. “The city’s plan for achieving the requirements of these consent decrees is described in the 'Integrated Plan and 2015 Wet Weather Management Plan Updated Report’. One of the key elements of the plan is the LOT. Due to the durations required to construct the tunnel, LOT was advertised in late 2020, in order to begin construction in early 2021 and meet the required completion dates stipulated in these agreements.”
The LOT main tunnel will be constructed of concrete segments with three main shafts at Tuttle Park north of Lane Avenue, Gowdy Field near Third Avenue and Olentangy River Road and Vine Street. A microtunnel 90 in. in diameter also will be built to relieve OARS near Second Avenue, which will begin at the Second Avenue and Perry Street intersection and flow west into the LOT at the Gowdy Field Shaft. Cawley, who monitors all construction activities, coordinates with the project stake-
holders, as well as the public, to ensure that city management is kept updated on all project matters, said a majority of the work in the first year is confined to existing city right-ofway or controlled sites that don’t have a large impact on residents. However, one site does pose vibratory concerns to a nearby facility that houses sensitive equipment. “In the coming years, there will be additional sites that will close sections of roads in the Harrison West neighborhood and portions of Tuttle Park for multiple years, in see LOT page 2