30TH STREET, N.W. over C&O CANAL

Facts 

Name:	30TH STREET, N.W. over C&O CANAL
Structure number:	0005
Location:	GEORGETOWN & C&O CANAL
Purpose:	Carries highway and pedestrian walkway over waterway
Route classification:	Local (Urban) [19]
Length of largest span:	20.0 ft. [6.1 m]
Total length:	20.0 ft. [6.1 m]
Roadway width between curbs:	24.3 ft. [7.4 m]
Deck width edge-to-edge:	28.5 ft. [8.7 m]
Vertical clearance below bridge:	9.8 ft. [3.0 m]
Owner:	State Highway Agency [01]
Year reconstructed:	1929
Historic significance:	Bridge is eligible for the National Register of Historic Places [2]
Main span material:	Steel [3]
Main span design:	Stringer/Multi-beam or girder [02]
Deck type:	Concrete Cast-in-Place [1]
Wearing surface:	Bituminous [6]

2010 Inspection 

Status:	Posted for load [P]
Average daily traffic:	1,000 [as of 2007]
Truck traffic:	1% of total traffic
Deck condition:	Serious [3 out of 9]
Superstructure condition:	Fair [5 out of 9]
Substructure condition:	Poor [4 out of 9]
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:	In place and functioning [2]
Scour condition:	Bridge foundations (including piles) on dry land well above flood water elevations. [9]
Operating rating:	35.0 tons [31.8 metric tons]
Inventory rating:	15.0 tons [13.6 metric tons]
Evaluation:	Not applicable [N]
Sufficiency rating:	23.6
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:	$1,150,000

2000 Inspection 

Status:	Posted for load [P]
Average daily traffic:	500 [as of 1992]
Truck traffic:	1% of total traffic
Deck condition:	Poor [4 out of 9]
Superstructure condition:	Fair [5 out of 9]
Substructure condition:	Fair [5 out of 9]
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:	In place and functioning [2]
Scour condition:	Scour calculation/evaluation has not been made. [6]
Operating rating:	57.9 tons [52.6 metric tons]
Inventory rating:	33.9 tons [30.8 metric tons]
Evaluation:	Not applicable [N]
Sufficiency rating:	66.3
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:	$1,150,000

1992 Inspection 

Status:	Posted for load [P]
Average daily traffic:	500 [as of 1990]
Truck traffic:	1% of total traffic
Deck condition:	Poor [4 out of 9]
Superstructure condition:	Fair [5 out of 9]
Substructure condition:	Fair [5 out of 9]
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:	In place and functioning [2]
Scour condition:	Scour calculation/evaluation has not been made. [6]
Operating rating:	14.9 tons [13.5 metric tons]
Inventory rating:	14.9 tons [13.5 metric tons]
Evaluation:	Not applicable [N]
Sufficiency rating:	41.9
Recommended work:	Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:	$1,150,000

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