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ST HELENA ROAD over MARK WEST CREEK

Map

Coordinates:
+38.51361, -122.63639
38°30'49" N, 122°38'11" W

Facts

Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:ST HELENA ROAD over MARK WEST CREEK
Structure number:20C0268
Location:1.1 MI E CALISTOGA RD
Purpose:Carries highway over waterway
Route classification:Local (Rural) [09]
Length of largest span:60.0 ft. [18.3 m]
Total length:103.0 ft. [31.4 m]
Roadway width between curbs:25.6 ft. [7.8 m]
Deck width edge-to-edge:26.2 ft. [8.0 m]
Skew angle:30°
Owner:County Highway Agency [02]
Year built:1976
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Main span material:Steel [3]
Main span design:Stringer/Multi-beam or girder [02]
Deck type:Concrete Cast-in-Place [1]

Latest Available Inspection: October 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:2,100 [as of 2010]
Truck traffic:1% of total traffic
Deck condition:Good [7 out of 9]
Superstructure condition:Fair [5 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck geometry appraisal:Basically intolerable requiring high priority of replacement [2]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Meets minimum tolerable limits to be left in place as is [4]
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 foundations determined to be stable for assessed or calculated scour condition. [5]
Operating rating:62.0 tons [56.4 metric tons]
Inventory rating:37.1 tons [33.7 metric tons]
Sufficiency rating:58.4
Recommended work:Bridge rehabilitation because of general structure deterioration or inadequate strength. [35]
Estimated cost of work:$421,000

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
October 201658.4FairGoodFairGoodFO2100
October 201270.9GoodGoodGoodGoodFO2100
November 200891.8GoodGoodGoodGood-200
December 200491.8GoodGoodGoodGood-200
November 200291.8GoodGoodGoodGood-200
April 200191.8GoodGoodGoodGood-200
November 200091.8GoodGoodGoodGood-200
March 199892.1GoodGoodGoodGood-200
February 199692.6GoodGoodGoodGood-200
April 199492.6GoodGoodGoodGood-200
June 199292.6GoodGoodGoodGood-200