Sheetz Gasoline

Sheetz Gasoline
Strongsville, Ohio
Owner:
Sheetz, Inc.
Engineer:
GPD Group
Contractor:
JTO, Inc.
Technical Description:
l
(34) Terre Arch™48 chambers
l
(4) Distribution manifolds
Installation:
April 2014
The construction of a Sheetz gas station, restaurant, and convenience store
in Strongsville, Ohio, necessitated the need for a stormwater management
system. Although this was a re-development project, the local stormwater
regulations required Sheetz to address both storm water detention and
treatment of the first flush.
The site had three challenges: 1) a shallow outlet to the existing storm sewer
system 2) flat site topography and 3) a small horizontal footprint for
underground stormwater management. Because of these factors, a
relatively short vertical envelope was available to place an underground
detention system.
The engineer of record, GPD Group, selected the Terre Arch TA48 from
Contech Engineered Solutions for underground stormwater management,
including both volume detention and stormwater quality. Terre Arch is a
modular, multi-chambered, precast concrete stormwater storage system
that is engineered especially for underground installation.
One reason the engineer selected Terre Arch is it only required 12 inches of
cover, including the asphalt pavement. This allowed the engineer to fully
utilize the 48” rise of the Terre Arch and still connect to the existing storm
sewer system. Other solutions would have required a significantly shorter
vertical rise in order to meet minimum cover requirements. As a result, the Terre Arch solution provided the
smallest horizontal footprint compared to other available options. In addition, the engineer required a special
design for the inlet distribution boxes which included a sump to help address storm water quality requirements.
Besides meeting the design constraints, the Terre Arch also provided the lowest total installed cost among
available solutions. “The Terre Arch TA48 provided the best possible solution for this particular site,” said Jesse
Rufener, PE, Project Manager at GPD Group. “Contech’s engineering design staff was helpful in establishing the
optimum layout to obtain the smallest possible horizontal footprint using this solution. In light of the shallow cover,
this affordable precast open-bottom arch provides a long-term confidence that the structure will continue to support
vehicle live-loads throughout its expected service life."
800-338-1122 | www.ContechES.com
© 2016 Contech Engineered Solutions LLC
Sheetz Gasoline
Strongsville, Ohio
The site utility contractor installed all of the precast concrete components of the Terre Arch system in a total of ten
hours over a two-day period. Standard equipment was used to excavate and prepare the trench for receiving the
precast Terre Arch units. All precast components were installed using a crane. Once all the precast elements were
installed, the site contractor commenced with the backfill operation using standard site construction equipment.
Leon Tang, Estimator/Project Manager at JTO, had this to say about installing Terre Arch. “Our company is very
experienced at installing various types of open-bottom underground detention systems, including plastic chambers
and other types of precast concrete. Terre Arch is far and away the easiest system we have installed to date.
Although it is made from precast concrete, it is extremely “contractor friendly” and allows for high production rates
while maintaining the correct alignment. Contech’s on-site support throughout the entire installation was very helpful
in maintaining an orderly approach for the placement of the Terre Arch system.”
Terre Arch was the ideal solution for all stakeholders in this project. Terre Arch provided quick approval and
acceptance by the local review agency; easy, problem-free installation from the contractor, and a permanent and
sustainable stormwater management solution for the project owner.
800-338-1122 | www.ContechES.com
© 2016 Contech Engineered Solutions LLC