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Q STREET, N.W. over ROCK CREEK

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

Facts 

Name:Q STREET, N.W. over ROCK CREEK
Structure number:0117
Location:Q ST. OVER ROCK CREEK
Purpose:Carries highway and pedestrian walkway over highway and waterway
Route classification:Minor Arterial (Urban) [16]
Length of largest span:57.1 ft. [17.4 m]
Total length:265.1 ft. [80.8 m]
Roadway width between curbs:33.1 ft. [10.1 m]
Deck width edge-to-edge:49.9 ft. [15.2 m]
Vertical clearance below bridge:13.5 ft. [4.1 m]
Owner:State Highway Agency [01]
Year built:1915
Year reconstructed:2000
Historic significance:Bridge is on the National Register of Historic Places [1]
Design load:MS 18 / HS 20 [5]
Number of main spans:5
Main spans material:Concrete [1]
Main spans design:Arch - Deck [11]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Integral Concrete (separate non-modified layer of concrete added to structural deck) [2]

Latest Available Inspection: May 2014 

Status:Open, no restriction [A]
Average daily traffic:10,100 [as of 2007]
Truck traffic:1% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Satisfactory [6 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Underclearances appraisal:Basically intolerable requiring high priority of corrrective action [3]
Water adequacy appraisal:Superior to present desirable criteria [9]
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:In place and functioning [2]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:69.9 tons [63.5 metric tons]
Inventory rating:41.9 tons [38.1 metric tons]
Evaluation:Functionally obsolete [2]
Sufficiency rating:75.7
Recommended work:Other structural work, including hydraulic replacements. [38]
Estimated cost of work:$5,000,000

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
May 201475.7Functionally obsoleteGoodSatisfactoryGood10100
June 201275.7Functionally obsoleteSatisfactorySatisfactorySatisfactory10100
December 200973.6Functionally obsoleteGoodSatisfactoryGood10100
January 200873.3Not deficientGoodGoodGood12300
August 200573.3Not deficientVery GoodVery GoodGood12300
July 200373.3Not deficientVery GoodVery GoodGood12300
August 200173.3Not deficientExcellentVery GoodGood12300
December 199755.8Structurally deficientPoorFairFair12300
February 19965.4Structurally deficientPoorPoorFair12300
June 199336.0Structurally deficientPoorPoorFair12300
September 199052.3Structurally deficientPoorFairFair12300