US Bridges

230 Street over Minor Drainage

FairPosted for load

Fremont County, Iowa · 068431703 · Structure no. 000000000159620

Built
1940
85 years old
Condition
Fair
inspected June 2023
Type
Girder and Floorbeam System
Steel
Length
60 ft
1 main span
Daily traffic
11
2022 count
Owner
County
County Highway Agency

About this bridge

230 Street over Minor Drainage is a steel girder and floorbeam system carrying 230 Street over Minor Drainage in Fremont County, Iowa. It was built in 1940, so it is 85 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 11 vehicles a day, roughly 36% of them trucks, projected to reach 11 by 2043. The structure is 60 ft (18.3 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries230 Street
CrossesMinor Drainage
Location068431703
RouteCounty Highway 0
CountyFremont County
StateIowa
Coordinates40.71831, -95.79427
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating6 US tons
Inventory rating3.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span59 ft (18 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2022)
Projected traffic11 by 2043
Trucks36%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 230 Street over Minor Drainage built?

It was built in 1940, making it 85 years old in 2025.

What condition is 230 Street over Minor Drainage 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 June 2023.

How much traffic does 230 Street over Minor Drainage carry?

About 11 vehicles per day (2022 count), of which roughly 36% are trucks.

How long is 230 Street over Minor Drainage?

The structure is 60 ft (18.3 m) long with a longest span of 59 ft (18 m) and a deck 16 ft wide.

Who owns 230 Street over Minor Drainage?

It is owned by the County Highway Agency.