304th Avenue over Spring Creek


+45.81911, -100.11049
45°49'09" N, 100°06'38" W


Source: National Bridge Inventory. Information not verified; use at your own risk.
Name:304th Avenue over Spring Creek
Structure number:000000011180085
Location:1 S & 2 W of Herreid
Purpose:Carries highway over waterway
Route classification:Major Collector (Rural) [07]
Length of largest span:29.9 ft. [9.1 m]
Total length:140.1 ft. [42.7 m]
Roadway width between curbs:24.0 ft. [7.3 m]
Deck width edge-to-edge:28.2 ft. [8.6 m]
Owner:County Highway Agency [02]
Year built:1954
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:5
Main spans material:Concrete continuous [2]
Main spans design:Slab [01]
Deck type:Concrete Cast-in-Place [1]
Wearing surface:Monolithic Concrete (concurrently placed with structural deck) [1]

Latest Available Inspection: June 2016

Good/Fair/Poor Condition:Fair
Status:Open, no restriction [A]
Average daily traffic:180 [as of 2014]
Truck traffic:3% of total traffic
Deck condition:Satisfactory [6 out of 9]
Superstructure condition:Good [7 out of 9]
Substructure condition:Good [7 out of 9]
Structural appraisal:Equal to present minimum criteria [6]
Deck geometry appraisal:Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Water adequacy appraisal:Equal to present desirable criteria [8]
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 foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:30.1 tons [27.4 metric tons]
Inventory rating:23.2 tons [21.1 metric tons]
Sufficiency rating:78.7

Previous Inspections

DateSuff. RatingConditionDeckSuperstructureSubstructureSD/FOADT
June 201678.7FairSatisfactoryGoodGood-180
July 201490.1FairFairSatisfactorySatisfactory-180
June 201282.8FairFairSatisfactorySatisfactory-180
July 201083.8FairFairSatisfactorySatisfactory-180
August 200883.8FairFairSatisfactorySatisfactory-180
August 200683.8FairFairSatisfactorySatisfactory-180
June 200483.8FairFairSatisfactorySatisfactory-180
June 200284.8FairSatisfactorySatisfactorySatisfactory-180
June 200083.8FairFairSatisfactorySatisfactory-180
September 199873.8FairSatisfactorySatisfactoryFair-180
September 199683.8FairSatisfactoryVery GoodGood-180
June 199483.1FairSatisfactoryVery GoodGood-180
July 199283.1FairSatisfactoryVery GoodGood-180
September 199083.1GoodGoodVery GoodVery Good-180