Washington Gas Proposes Continuation of STRIDE Plan to Accelerate Natural Gas Infrastructure Replacements and Enhancements in Maryland

Washington Gas, a WGL Company (NYSE: WGL), today filed a 5-year plan
with the Maryland Public Service Commission to continue progress in the
Company’s Strategic Infrastructure Development and Enhancement (STRIDE)
initiative to replace aging pipelines in its natural gas system
throughout the state.

STRIDE allows Washington Gas to recover its costs as investments are
made, enabling the acceleration of natural gas infrastructure
replacement. The new plan proposes to replace 120 miles of pipeline and
14,400 services in Maryland between 2019 and 2023.

Washington Gas is currently in the final year of the first phase of its
22-year STRIDE program to enhance safety and improve reliability across
its Maryland system by continuing the accelerated replacement of its
distribution and transmission systems. The Maryland General Assembly
enacted STRIDE law in 2013. Washington Gas filed its first plan in late
2013, which was approved in 2014.

“Maryland’s STRIDE program is an innovative approach to replacing aging
gas infrastructure to enhance safety and improve the reliability of our
system. We are pleased that over the last four years, we have been able
to replace 66 miles of pipeline and 15,000 services in Maryland through
March of 2018. We are proud that these improvements also lead to a
lowering of greenhouse gas emissions,” said Adrian Chapman, President
and Chief Operating Officer at Washington Gas. “We have been delivering
safe, reliable and affordable natural gas to customers for 170 years,
and our continued investment through STRIDE positions us to keep a
proven track record of providing quality service to Marylanders for many
years to come.”

Washington Gas’ investment under the 2019-2023 plan is anticipated to be
approximately $393 million. Approval of the filing will result in
residential heating customers paying a surcharge of 37 cents per month
beginning in 2019, the first year of the 5-year plan.

About Washington Gas

Washington Gas Light Company is a regulated natural gas utility
providing safe, reliable natural gas service to more than 1.1 million
customers in the District of Columbia, Maryland and Virginia. A
subsidiary of WGL Holdings, Inc. (WGL), the company has been providing
energy to residential, commercial and industrial customers for 170
years. Follow us @washingtongas on Twitter.

About WGL

WGL (NYSE: WGL), headquartered in Washington, D.C., is a leading source
for clean, efficient and diverse energy solutions. With activities and
assets across the U.S., WGL consists of Washington Gas, WGL Energy, WGL
Midstream and Hampshire Gas. WGL provides options for natural gas,
electricity, green power and energy services, including generation,
storage, transportation, distribution, supply and efficiency. Our
calling as a company is to make energy surprisingly easy for our
employees, our community and all our customers. Whether you are a
homeowner or renter, small business or multinational corporation, state
and local or federal agency, WGL is here to provide Energy Answers. Ask
Us. For more information, visit us at wgl.com.

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