The electric system serving Ann Arbor was built over a span of nearly 100 years, adding substations and circuits as development created increasing demand for power. This resulted in a web of power lines tying one substation to another. This configuration means that a problem with a power line or piece of equipment in one area can result in a disruption for customers more than 10 miles away.

Ann Arbor continues to be an attractive location for new-economy, high-tech businesses to locate or expand operations. These businesses provide vital support for the community’s economy, job market and civic culture. To help Ann Arbor maintain its competitive advantage in attracting these kinds of employers, DTE must make improvements to the energy grid to ensure more reliable, high-quality electric service.

To resolve these problems and improve reliability for customers throughout the Ann Arbor area, DTE is planning to build two new substations – one at the corner of Hubbard and Huron Parkway and one on the existing site of the State substation on State St. north of Eisenhower Parkway.  In conjunction with the two new substations, DTE will build and install a new underground conduit system along State Street, Granger and Forest avenues.

DTE is also planning upgrades to existing overhead power lines and equipment that will reduce the frequency of outages and minimize the number of customers impacted and the duration when outages do occur.

In addition to ongoing communications with multiple city departments, businesses and organizations, representatives from DTE held three public open houses in Ann Arbor to provide information about the projects and how they will benefit the community. Periodic updates can also be found below.

May 21, 2018:

DTE Energy is working with the City of Ann Arbor to obtain construction permits to begin work on the sub-transmission lines that will run from State to Granger, and Granger to Forest to North campus. Construction will begin after those permits are received and will be completed within 10 months.

The State station will be constructed in two phases. The first phase, which includes retaining and security walls is already in progress and is expected to be completed in the summer of 2019. The second phase will begin in September 2018.

Residents and businesses impacted by construction will be notified 10 days before work is scheduled to begin. As a reminder, door hangers will be placed on the doors of homes and businesses 3 days before construction.

July 6, 2018

Construction has started on the underground conduit system at State Station, and will continue through August. Due to the construction, Private Drive — the entrance to the Ann Arbor School District Administration building from State Street — is closed through Saturday, July 28. Please follow the posted detour signs and enter from Boardwalk Road.

October 12, 2018:

Construction on the State Street substation is underway and will continue throughout October. Significant progress has been made on the project, including installation of underground cables. The purpose of this work is to improve electric reliability in the Ann Arbor area.

Traffic shifts on State Street have allowed DTE crews to perform work and prepare the substation for equipment deliveries. During the weekends of October 21 and October 28, transformers and control houses needed to energize the substation will be delivered and installed.

DTE will continue to provide status updates for the project here on In addition, we will hold public meetings before starting the second phase of work. Impacted customers will receive a personal invitation mailed to their homes.

Stay tuned.

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