Us-70/Sec-19/L21.6 over Blackfish Lake


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:Us-70/Sec-19/L21.6 over Blackfish Lake
Structure number:000000000001377
Location:3.45 Mi Sw Crittenden Co
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:60.0 ft. [18.3 m]
Total length:470.2 ft. [143.3 m]
Roadway width between curbs:27.2 ft. [8.3 m]
Deck width edge-to-edge:29.9 ft. [9.1 m]
Owner:State Highway Agency [01]
Year built:1930
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:M 13.5 / H 15 [2]
Number of main spans:9
Main spans material:Concrete [1]
Main spans design:Tee beam [04]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Bituminous [6]

Latest Available Inspection: March 2018

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:1,300 [as of 2014]
Truck traffic:18% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Fair [5 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Meets minimum tolerable limits to be left in place as is [4]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
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]
Sufficiency rating:64.8
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$1,005,000

Previous Inspections

DateConditionDeckSuperstructureSubstructureADTSuff. Rating
March 2018FairSatisfactoryFairFair130064.8
March 2016FairSatisfactoryFairFair120064.8
March 2014FairSatisfactoryFairFair120064.8
March 2012FairSatisfactoryFairFair110064.9
April 2010FairSatisfactoryFairFair110063.6
March 2008FairSatisfactoryFairFair110051.7
March 2006FairSatisfactoryFairFair120051.7
March 2004FairSatisfactoryFairFair230049.5
April 2002FairSatisfactoryFairFair270049.2
March 2000FairSatisfactoryFairFair100052.6
February 1998FairSatisfactoryFairFair150051.5
January 1996FairSatisfactoryFairFair67076.1
August 1994FairSatisfactoryFairFair67076.1
July 1992FairSatisfactoryFairFair67065.6
July 1991FairSatisfactoryFairFair125857.5

Element Data

Source: National Bridge Elements dataset, 2019 edition. This feature is experimental.
Steel Girder/Beamlinear ft.1451250200
Reinforced Concrete Girder/Beamlinear ft.1,8851,79720680
Reinforced Concrete Decksq. ft.990990000
Reinforced Concrete Top Flangesq. ft.13,11011,9221,0581300
Reinforced Concrete Pier Walllinear ft.1681400280
Reinforced Concrete Abutmentlinear ft.6463010
Reinforced Concrete Pileeach1511040
Timber Pileeach55000
Reinforced Concrete Pier Caplinear ft.2451520930
Movable Bearingeach3800380
Fixed Bearingeach40020200
Bridge Rail
Reinforced Concrete Bridge Raillinear ft.9218570640