US Bridges

420th ST over Barry Creek

Good

O'Brien County, Iowa · 095 39 20 01 · Structure no. 000000000259701

Built
2011
14 years old
Condition
Good
inspected June 2023
Type
Other
Steel
Length
69 ft
1 main span
Daily traffic
71
2022 count
Owner
County
County Highway Agency

About this bridge

420th ST over Barry Creek is a steel other carrying 420th ST over Barry Creek in O'Brien County, Iowa. It was built in 2011, so it is 14 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 71 vehicles a day, projected to reach 71 by 2043. The structure is 69 ft (21 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries420th ST
CrossesBarry Creek
Location095 39 20 01
RouteCounty Highway 0
CountyO'Brien County
StateIowa
Coordinates43.03975, -95.47338
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.8 US tons
Inventory rating20.7 US tons

Structure

Structure typeOther
MaterialSteel
DeckSteel plate
Main spans1
Design loadHL 93
Structure length69 ft (21 m)
Longest span67 ft (20.4 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2022)
Projected traffic71 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$50,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 420th ST over Barry Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is 420th ST over Barry Creek 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 June 2023.

How much traffic does 420th ST over Barry Creek carry?

About 71 vehicles per day (2022 count).

How long is 420th ST over Barry Creek?

The structure is 69 ft (21 m) long with a longest span of 67 ft (20.4 m) and a deck 27 ft wide.

Who owns 420th ST over Barry Creek?

It is owned by the County Highway Agency.