Key Bridge underwent a major inspection in 2011.
 Officials were concerned that the chemical agents used to bond the tensioned cables running through the concrete road deck were corroding the concrete.
The architectural engineering firm of Johnson, Mirmiran & Thompson (JMT) was hired to inspect the bridge.
JMT discovered that the deck slab was ready to fail, and there was extensive corrosive deterioration of the underside of the concrete deck.
Cracks were also found in some of the abutments, arches and spandrel arches, concrete deck, and piers.
The sonic echo/impulse response method was used to identify areas within the concrete where cables had disintegrated or where corrosion had created voids.
JMT restored some deteriorated portions of the deck.
The bridge was rated "structurally deficient" after these tests.

In 2013, Key Bridge carried approximately 62,000 vehicles each day.
The Washington Post in April 2014 called Key Bridge one of the three "busiest deficient bridges" in the District of Columbia, along with Arlington Memorial Bridge and the connection between Park Road and the Anacostia Freeway.

The District of Columbia Department of Transportation (DDOT) announced a two-year, $21 million rehabilitation of the bridge in April 2014.
In addition to repairing the previously-identified structural issues, the street lights were replaced with modern energy-efficient lampposts, the guard rail between the roadway and sidewalks was strengthened, the bridge's drainage system fixed and improved, and the bridge painted.
Key Bridge underwent a major inspection in 2011.  Officials were concerned that the chemical agents used to bond the tensioned cables running through the concrete road deck were corroding the concrete. The architectural engineering firm of Johnson, Mirmiran & Thompson (JMT) was hired to inspect the bridge. JMT discovered that the deck slab was ready to fail, and there was extensive corrosive deterioration of the underside of the concrete deck. Cracks were also found in some of the abutments, arches and spandrel arches, concrete deck, and piers. The sonic echo/impulse response method was used to identify areas within the concrete where cables had disintegrated or where corrosion had created voids. JMT restored some deteriorated portions of the deck. The bridge was rated "structurally deficient" after these tests.
In 2013, Key Bridge carried approximately 62,000 vehicles each day. The Washington Post in April 2014 called Key Bridge one of the three "busiest deficient bridges" in the District of Columbia, along with Arlington Memorial Bridge and the connection between Park Road and the Anacostia Freeway.
The District of Columbia Department of Transportation (DDOT) announced a two-year, $21 million rehabilitation of the bridge in April 2014. In addition to repairing the previously-identified structural issues, the street lights were replaced with modern energy-efficient lampposts, the guard rail between the roadway and sidewalks was strengthened, the bridge's drainage system fixed and improved, and the bridge painted.
Key Bridge (Washington, D.C.)