US Bridges

147th St. over Unamed CR

PoorPosted for load

Fayette County, Iowa · 093072603 · Structure no. 000000000151050

Built
1917
108 years old
Condition
Poor
inspected October 2023
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
49
2022 count
Owner
County
County Highway Agency

About this bridge

147th St. over Unamed CR is a concrete culvert carrying 147th St. over Unamed CR in Fayette County, Iowa. It was built in 1917, so it is 108 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 49 vehicles a day, projected to reach 49 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries147th St.
CrossesUnamed CR
Location093072603
RouteCounty Highway 0
CountyFayette County
StateIowa
Coordinates42.84309, -91.64551
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49 (2022)
Projected traffic49 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$270,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 147th St. over Unamed CR built?

It was built in 1917, making it 108 years old in 2025.

What condition is 147th St. over Unamed CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.

How much traffic does 147th St. over Unamed CR carry?

About 49 vehicles per day (2022 count).

How long is 147th St. over Unamed CR?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m).

Who owns 147th St. over Unamed CR?

It is owned by the County Highway Agency.