US Bridges

Big Springs RD over Stream

FairPosted for load

Clayton County, Iowa · 094053007 · Structure no. 000000000120590

Built
1954
71 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
56 ft
1 main span
Daily traffic
47
2022 count
Owner
County
County Highway Agency

About this bridge

Big Springs RD over Stream is a steel stringer/multi-beam or girder carrying Big Springs RD over Stream in Clayton County, Iowa. It was built in 1954, so it is 71 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for other load-capacity restriction.

It carries about 47 vehicles a day, projected to reach 47 by 2043. The structure is 56 ft (17.1 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBig Springs RD
CrossesStream
Location094053007
RouteCounty Highway 0
CountyClayton County
StateIowa
Coordinates42.92682, -91.46881
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 12 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36.8 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length56 ft (17.1 m)
Longest span55 ft (16.8 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47 (2022)
Projected traffic47 by 2043
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Big Springs RD over Stream built?

It was built in 1954, making it 71 years old in 2025.

What condition is Big Springs RD over Stream in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does Big Springs RD over Stream carry?

About 47 vehicles per day (2022 count).

How long is Big Springs RD over Stream?

The structure is 56 ft (17.1 m) long with a longest span of 55 ft (16.8 m) and a deck 22 ft wide.

Who owns Big Springs RD over Stream?

It is owned by the County Highway Agency.