The Pentagon is renewing its controversial push to close some military bases, and a new study suggests the Army could be impacted the most significantly.

The Defense Department on Friday sent a report to Congress that concludes the military's current network of installations has about 22 percent more space than is needed. It found that the Army has 33 percent excess capacity, the Air Force has 32 percent more space than it needs and the Navy is over by 7 percent.

The Defense Logistics Agency has 12 percent excess, according to the 20-page report, the first of its kind in 12 years. Military Times obtained a copy of the document on Friday.

"This level of excess underscores the need for a BRAC round because it is clear that the Department has more infrastructure than force structure plans require," it states .

The report aims "advance the dialogue" on the Defense Department’s long-standing request for a new Base Realignment and Closure Commission, the mechanism that Capitol Hill uses to identify which military bases to shutter, according to an accompanying letter from Deputy Defense Secretary Robert Work .

The new study is based on projected force levels in 2019.

Implementing a new BRAC would eventually save the Defense Department about $2 billion annually, according to the report, which does not identify specific facilities eyed for closure.

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Instead, it looks at the services' aggregate needs by comparing the Army's maneuver brigades to total training space, the size of the Navy's fleet to pier space, and the Air Force's total aircraft inventory to hangar and flight line space.

The last such study in 2004 found an overall excess capacity of 24 percent, suggesting that the 2005 BRAC that called for closing 22 major military bases and shrinking 33 others had limited long-term impact.

Congress has convened base closure commissions five times in recent years, in 1988, 1991, 1993, 1995 and 2005. Typically BRACs aim to reduce total capacity by about 5 percent.

For years the Pentagon has urged Congress to close bases to save money. The size of the active-duty military has decreased by nearly half since the end of the Cold War and many facilities across the country are underused, unnecessary and require maintenance that is draining the military budget.

Yet eliminating military bases — and their well-paying government jobs — is intensely controversial on Capitol Hill because individual lawmakers fight to ensure their own local base is not affected.