Our businesses include DTE Gas and DTE Electric — energy companies regulated by the Michigan Public Service Commission — and non-regulated energy operations located throughout the country.
In 2015, we delivered electricity to our 2.2 million customers from coal, oil, nuclear, solar, wind and natural gas-fired sources. We generate and distribute electric services to residential, industrial, institutional and commercial customers. Purchased electricity accounted for 18 percent of the electricity supplied by DTE Electric during this period. DTE Electric owns and operates fossil fuel and nuclear plants totaling 10.5 gigawatts (GW) of installed capacity in Michigan as well as about 410 megawatts (MW) of renewable energy generating capacity in the state. In 2015, we generated 40.6 gigawatt-hours (GWh) of electricity.
DTE Electric owns and operates 676 substations, 1,600 power transformers, 432,000 distribution transformers, 1.1 million poles, and 260,000 miles of conductor - enough to circle the earth 10 times. We operate approximately 30,218 miles of overhead distribution lines and 15,814 miles of underground distribution lines. Our service territory encompasses 7,600 square miles.
DTE Gas
Our natural gas utility business serves approximately 1.2 million residential, commercial and industrial customers throughout Michigan (service territory covers 14,700 square miles). Founded in 1849, DTE Gas is one of the nation's largest natural gas utilities. We own distribution, storage and transportation facilities, approximately 2,000 miles of large gas transmission pipelines, and 19,000 miles of smaller distribution mains.
We own storage properties relating to four underground natural gas storage fields with an aggregate working gas storage capacity of 141 billion cubic feet. These facilities are important in providing reliable and cost-effective service to our customers. We also sell storage services to third parties. The company owns and operates 278 storage wells representing approximately 34 percent of the underground working capacity in Michigan. There is more natural gas storage capacity in Michigan than in any other state.
DTE Gas is directly connected to interstate pipelines, providing access to most of the major natural gas supply producing regions in the Gulf Coast, Mid-Continent, and Canadian regions. We are planning significant investments over the next two years to expand our capacity and increase the amount of natural gas our system can bring into Michigan and deliver to the state’s gas customers. This is important to maintain reliable and affordable supply for residential and business customers, especially as natural gas is increasingly used as a fuel for generating electricity, replacing more carbon-intensive coal-fired capacity.
Learn more about our work to maintain safety and reliability of natural gas supply.
Gas Storage and Pipelines
DTE Energy controls two natural gas storage fields in Michigan, gathering pipeline systems in Michigan and Pennsylvania and ownership interests in two interstate pipelines. The two storage facilities in Michigan (combined working storage capacity of 91 billion cubic feet) operate separately from our regulated gas utility assets, but are well integrated. DTE Gas provides physical operations, maintenance and technical support for the storage facilities and for the in-state gathering systems.
Gas Storage and Pipelines has more than doubled in net income over the past five years, reflecting tremendous growth in natural gas production and use. Continuing this trend, we are partnering with Houston-based Spectra Energy to develop the NEXUS Pipeline, a 255-mile gas pipeline through Ohio and Michigan that will serve the next generation of natural gas-fueled power plants. The pipeline, pending approval by the Federal Energy Regulatory Commission, is expected to be operational by the end of 2017.
Power and Industrial
Our Power and Industrial business provides energy-related products and services nationwide to energy-intensive industrial, commercial and institutional customers. Its product lines are concentrated in the renewable energy, industrial energy services, and environmental controls markets. In the renewable energy market, the company produces renewable energy from waste-wood and landfill gas for sale to regional electric utility companies and industrial customers. Industrial energy services includes the production of blast furnace coke and pulverized coal for sale to integrated steel producers and the provision of on-site energy services such as waste water treatment, process steam, co-generated power, chilled and hot water, and compressed air to automotive, chemical, and consumer products companies and institutions such as hospitals, universities and governmental authorities. The environmental services business uses a proprietary process to treat coal resulting in reduced environmental emissions when combusted. Power and Industrial now encompasses more than 60 projects in 17 states.
Energy Trading
DTE Energy Trading conducts energy marketing and trading operations, serving primarily utilities, local distribution companies and other marketers.
DTE Operations in Michigan
View our renewable energy project map here >
Acquisitions and Closures during 2015
January 2015 – DTE Electric acquired a 732 MW simple cycle natural gas facility in Carson City, Michigan, to serve customer demand during peak periods.
October 2015 – DTE Electric acquired a 350 MW simple cycle natural gas facility in East China Township, Michigan, also serving peak load.
Fourth quarter 2015 – DTE Energy announced closure of the Shenango coke battery plant in Pittsburgh, Pennsylvania, in response to a sharp downturn in the North American steel industry. The plant was part of the Power and Industrial segment.