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CHAIN BRIDGE over POTOMAC R. & C&O

Map 

Coordinates:
+38.92976, -77.11603
38°55'47" N, 77°06'58" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.

Facts 

Name:CHAIN BRIDGE over POTOMAC R. & C&O
Structure number:0001
Location:OVER POTOMAC RIVER, N.W.
Purpose:Carries highway and pedestrian walkway over waterway
Route classification:Other Principal Arterial (Urban) [14]
Length of largest span:171.9 ft. [52.4 m]
Total length:1382.9 ft. [421.5 m]
Roadway width between curbs:35.1 ft. [10.7 m]
Deck width edge-to-edge:44.6 ft. [13.6 m]
Vertical clearance below bridge:99.1 ft. [30.2 m]
Owner:State Highway Agency [01]
Year built:1937
Year reconstructed:1983
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:8
Main spans material:Steel continuous [4]
Main spans design:Girder and floorbeam system [03]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Latex Concrete or similar additive [3]

Latest Available Inspection: December 2013 

Status:Open, no restriction [A]
Average daily traffic:21,800 [as of 2006]
Truck traffic:2% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Satisfactory [6 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
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:61.8 tons [56.2 metric tons]
Inventory rating:37.0 tons [33.6 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:66.0

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
December 201366.0Functionally obsoleteGoodGoodSatisfactory21800
December 201165.0Functionally obsoleteGoodSatisfactorySatisfactory21800
January 201065.0Functionally obsoleteGoodSatisfactorySatisfactory21800
October 200754.0Functionally obsoleteGoodSatisfactoryFair21800
June 200666.0Functionally obsoleteGoodSatisfactorySatisfactory25400
May 200564.0Functionally obsoleteGoodSatisfactorySatisfactory25400
September 200464.0Functionally obsoleteGoodSatisfactorySatisfactory25400
March 200364.0Functionally obsoleteGoodSatisfactoryGood25400
July 199965.0Functionally obsoleteGoodGoodGood25400
April 199765.0Functionally obsoleteGoodGoodGood25400
December 199465.0Functionally obsoleteGoodGoodGood25400
December 199265.0Functionally obsoleteGoodGoodGood25400
April 199065.0Not deficientGoodGoodGood25400