US Bridges

230th Ave over Branch Flank Creek

Good

Warren County, Iowa · 074220201 · Structure no. 000000000332571

Built
2019
6 years old
Condition
Good
inspected October 2023
Type
Slab
Steel
Length
35 ft
1 main span
Daily traffic
62
2022 count
Owner
County
County Highway Agency

About this bridge

230th Ave over Branch Flank Creek is a steel slab carrying 230th Ave over Branch Flank Creek in Warren County, Iowa. It was built in 2019, so it is 6 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 62 vehicles a day, projected to reach 62 by 2043. The structure is 35 ft (10.7 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries230th Ave
CrossesBranch Flank Creek
Location074220201
RouteCounty Highway 0
CountyWarren County
StateIowa
Coordinates41.24274, -93.36661
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.5 US tons
Inventory rating36.9 US tons

Structure

Structure typeSlab
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span34 ft (10.4 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2022)
Projected traffic62 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$30,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was 230th Ave over Branch Flank Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is 230th Ave over Branch Flank 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 October 2023.

How much traffic does 230th Ave over Branch Flank Creek carry?

About 62 vehicles per day (2022 count).

How long is 230th Ave over Branch Flank Creek?

The structure is 35 ft (10.7 m) long with a longest span of 34 ft (10.4 m) and a deck 25 ft wide.

Who owns 230th Ave over Branch Flank Creek?

It is owned by the County Highway Agency.