US Bridges

15th Ave. over Mineral Creek

FairPosted for load

Jones County, Iowa · 085012504 · Structure no. 000000000207880

Built
1950
75 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
112 ft
3 main spans
Daily traffic
34
2022 count
Owner
County
County Highway Agency

About this bridge

15th Ave. over Mineral Creek is a steel stringer/multi-beam or girder carrying 15th Ave. over Mineral Creek in Jones County, Iowa. It was built in 1950, so it is 75 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 6 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 34 vehicles a day, projected to reach 34 by 2043. The structure is 112 ft (34.1 m) long and 19 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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Carries15th Ave.
CrossesMineral Creek
Location085012504
RouteCounty Highway 0
CountyJones County
StateIowa
Coordinates42.1377, -90.90271
Functional classRural Minor Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length112 ft (34.1 m)
Longest span42 ft (12.8 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)
Projected traffic34 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 15th Ave. over Mineral Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is 15th Ave. over Mineral Creek 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 March 2023.

How much traffic does 15th Ave. over Mineral Creek carry?

About 34 vehicles per day (2022 count).

How long is 15th Ave. over Mineral Creek?

The structure is 112 ft (34.1 m) long with a longest span of 42 ft (12.8 m) and a deck 19 ft wide.

Who owns 15th Ave. over Mineral Creek?

It is owned by the County Highway Agency.