US Bridges

30th ST over Unamed CR

Good

Fayette County, Iowa · 091102903 · Structure no. 000000000150021

Built
2004
21 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
70
2022 count
Owner
County
County Highway Agency

About this bridge

30th ST over Unamed CR is a concrete culvert carrying 30th ST over Unamed CR in Fayette County, Iowa. It was built in 2004, so it is 21 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 70 vehicles a day, projected to reach 70 by 2044. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries30th ST
CrossesUnamed CR
Location091102903
RouteCounty Highway 0
CountyFayette County
StateIowa
Coordinates42.67129, -92.04574
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length31 ft (9.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2022)
Projected traffic70 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 30th ST over Unamed CR built?

It was built in 2004, making it 21 years old in 2025.

What condition is 30th ST over Unamed CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does 30th ST over Unamed CR carry?

About 70 vehicles per day (2022 count).

How long is 30th ST over Unamed CR?

The structure is 31 ft (9.4 m) long with a longest span of 10 ft (3 m).

Who owns 30th ST over Unamed CR?

It is owned by the County Highway Agency.