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

Map

Coordinates:
+38.90526, -77.05586
38°54'19" N, 77°03'21" W

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:	13.1 ft. `[4.0 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]`
Sufficiency rating:	81.0

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

Source: National Bridge Elements dataset, 2018 edition. This feature is experimental.

Element	Units	Quantity	1-Good	2-Fair	3-Poor	4-Serious
Superstructure
Steel Girder/Beam	linear ft.	1,392	1,392	0	0	0
Steel Protective Coating	sq. ft.	16,400	16,400	0	0	0
Deck
Reinforced Concrete Deck	sq. ft.	14,220	14,216	0	4	0
Substructure
Reinforced Concrete Pier Wall	linear ft.	141	130	5	6	0
Reinforced Concrete Abutment	linear ft.	141	120	21	0	0
Reinforced Concrete Pier Cap	linear ft.	141	141	0	0	0
Joints
Compression Joint	linear ft.	141	0	71	70	0
Bearings
Movable Bearing	each	18	17	1	0	0
Steel Protective Coating	sq. ft.	25	25	0	0	0
Fixed Bearing	each	6	6	0	0	0
Steel Protective Coating	sq. ft.	25	24	1	0	0
Bridge Rail
Steel or Aluminum Bridge Rail	linear ft.	470	470	0	0	0
Steel Protective Coating	sq. ft.	1,723	1,723	0	0	0
Reinforced Concrete Bridge Rail	linear ft.	470	470	0	0	0