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POTLATCH ROAD over BIG CREEK TRESTLE

Map

Coordinates:
+47.26939, -116.11103
47°16'10" N, 116°06'40" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:POTLATCH ROAD over BIG CREEK TRESTLE
Structure number:000000000030993
Location:4.1 E. CALDER
Purpose:Carries highway over waterway
Route classification:Minor Collector (Rural) [08]
Length of largest span:69.9 ft. [21.3 m]
Total length:74.2 ft. [22.6 m]
Roadway width between curbs:13.5 ft. [4.1 m]
Deck width edge-to-edge:14.4 ft. [4.4 m]
Owner:County Highway Agency [02]
Year built:1912
Year reconstructed:1991
Historic significance:Bridge is possibly eligible for the National Register of Historic Places [3]
Design load:MS 18 / HS 20 [5]
Main span material:Steel [3]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Wood or Timber [8]
Wearing surface:Wood or Timber [7]

Latest Available Inspection: August 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:100 [as of 2015]
Truck traffic:5% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Satisfactory [6 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:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Better than present minimum criteria [7]
Roadway alignment appraisal:Equal to present minimum criteria [6]
Channel protection:Bank is beginning to slump. River control devices and embankment protection have widespread minor damage. There is minor stream bed movement evident. Debris is restricting the channel slightly. [6]
Scour condition:Bridge with "unknown" foundation that has not been evaluated for scour. [U]
Operating rating:28.7 tons [26.1 metric tons]
Inventory rating:21.8 tons [19.8 metric tons]
Sufficiency rating:55.3
Recommended work:Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Estimated cost of work:$747,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
August 201655.3FairSatisfactorySatisfactoryFair-100
August 201455.3FairSatisfactorySatisfactoryFair-100
August 201255.3FairSatisfactorySatisfactoryFair-100
August 201065.3FairSatisfactorySatisfactorySatisfactory-100
August 200865.3FairSatisfactorySatisfactorySatisfactory-100
August 200665.3FairSatisfactorySatisfactoryGood-100
August 200465.3FairSatisfactorySatisfactoryGood-100
August 200265.3FairSatisfactorySatisfactoryGood-100
August 200065.3FairSatisfactorySatisfactoryGood-100
August 199865.3FairGoodSatisfactoryGood-100
August 199665.3FairGoodSatisfactoryGood-100
August 199465.3FairGoodSatisfactoryGood-100
August 199280.9GoodGoodGoodGood-100

Element Data

Source: National Bridge Elements dataset, 2016 edition. This feature is experimental.
ElementUnitsQuantity1. Good2. Fair3. Poor4. Serious
Superstructure
Steel Girder/Beamlinear ft.1480112360
Steel Protective Coatingsq. ft.4,0200004,020
Substructure
Reinforced Concrete Abutmentlinear ft.62322910
Deck
Timber Decksq. ft.1,07601,07600
Wearing Surfacessq. ft.945094500
Bearings
Movable Bearingeach20020
Steel Protective Coatingsq. ft.2800028
Fixed Bearingeach20020
Steel Protective Coatingsq. ft.2800028
Bridge Rail
Timber Bridge Raillinear ft.148148000