M STREET, N.W. over PARKWAY & ROCK CREEK

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.

Name:	M STREET, N.W. over PARKWAY & ROCK CREEK
Structure number:	0035
Location:	M ST. OVER PARKWAY N.W.
Purpose:	Carries highway and pedestrian walkway over highway and waterway
Route classification:	Other Principal Arterial (Urban) `[14]`
Length of largest span:	78.1 ft. `[23.8 m]`
Total length:	232.0 ft. `[70.7 m]`
Roadway width between curbs:	40.0 ft. `[12.2 m]`
Deck width edge-to-edge:	59.1 ft. `[18.0 m]`
Vertical clearance below bridge:	16.1 ft. `[4.9 m]`
Skew angle:	25°
Owner:	State Highway Agency `[01]`
Year built:	1928
Year reconstructed:	1999
Historic significance:	Bridge is possibly eligible for the National Register of Historic Places `[3]`
Design load:	MS 18 / HS 20 `[5]`
Number of main spans:	3
Main spans material:	Steel `[3]`
Main spans design:	Stringer/Multi-beam or girder `[02]`
Deck type:	Concrete Cast-in-Place `[1]`
Wearing surface:	Monolithic Concrete (concurrently placed with structural deck) `[1]`

Good/Fair/Poor Condition:	Good
Status:	Open, no restriction `[A]`
Average daily traffic:	10,800 `[as of 2007]`
Truck traffic:	1% of total traffic
Deck condition:	Good `[7 out of 9]`
Superstructure condition:	Very Good `[8 out of 9]`
Substructure condition:	Good `[7 out of 9]`
Structural appraisal:	Better than present minimum criteria `[7]`
Deck geometry appraisal:	Meets minimum tolerable limits to be left in place as is `[4]`
Underclearances appraisal:	Meets minimum tolerable limits to be left in place as is `[4]`
Water adequacy appraisal:	Superior to present desirable criteria `[9]`
Roadway alignment appraisal:	Equal to present desirable criteria `[8]`
Channel protection:	Banks are protected or well vegetated. River control devices such as spur dikes and embankment protection are not required or are in a stable condition. `[8]`
Pier/abutment protection:	Navigation protection not required `[1]`
Scour condition:	Bridge foundations determined to be stable for assessed or calculated scour condition. `[5]`
Operating rating:	65.9 tons `[59.9 metric tons]`
Inventory rating:	38.9 tons `[35.4 metric tons]`
Sufficiency rating:	81.0

Date	Suff. Rating	Condition	Deck	Superstructure	Substructure	SD/FO	ADT
September 2016	81.0	Good	Good	Very Good	Good	-	10800
September 2014	79.0	Good	Good	Very Good	Good	FO	10800
September 2012	79.0	Fair	Satisfactory	Good	Satisfactory	FO	10800
October 2010	79.0	Fair	Satisfactory	Good	Good	FO	10800
October 2008	79.0	Good	Good	Very Good	Good	FO	10800
October 2006	79.0	Good	Very Good	Very Good	Good	-	22300
October 2004	79.0	Good	Good	Very Good	Good	-	22300
December 2003	79.0	Good	Good	Very Good	Good	-	22300
December 2002	79.0	Good	Very Good	Very Good	Good	-	22300
January 2001	79.0	Good	Excellent	Very Good	Very Good	-	22300
May 1999	59.2	Good	Excellent	Very Good	Very Good	-	22300
May 1994	29.1	Poor	Serious	Serious	Poor	SD	22300
February 1992	29.1	Poor	Serious	Serious	Poor	SD	22300
March 1990	46.1	Poor	Serious	Poor	Poor	SD	22300