US Bridges

Fm.Rt C-20 over Dd #125

Fair

Wright County, Iowa · 093232301 · Structure no. 000000000363365

Built
1991
34 years old
Condition
Fair
inspected March 2023
Type
Arch - Deck
Concrete
Length
24 ft
1 main span
Daily traffic
970
2021 count
Owner
County
County Highway Agency

About this bridge

Fm.Rt C-20 over Dd #125 is a concrete arch - deck carrying Fm.Rt C-20 over Dd #125 in Wright County, Iowa. It was built in 1991, so it is 34 years old, younger 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.

It carries about 970 vehicles a day, roughly 22% of them trucks, projected to reach 970 by 2043. The structure is 24 ft (7.3 m) long and 29 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

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CarriesFm.Rt C-20
CrossesDd #125
Location093232301
RouteCounty Highway 0
CountyWright County
StateIowa
Coordinates42.86334, -93.52916
Functional classRural Major 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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.7 US tons
Inventory rating34.3 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic970 (2021)
Projected traffic970 by 2043
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fm.Rt C-20 over Dd #125 built?

It was built in 1991, making it 34 years old in 2025.

What condition is Fm.Rt C-20 over Dd #125 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 Fm.Rt C-20 over Dd #125 carry?

About 970 vehicles per day (2021 count), of which roughly 22% are trucks.

How long is Fm.Rt C-20 over Dd #125?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 29 ft wide.

Who owns Fm.Rt C-20 over Dd #125?

It is owned by the County Highway Agency.