US Bridges

FM over Drainage Ditch No. 22

Fair

Pocahontas County, Iowa · 090312902 · Structure no. 000000000277860

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
125 ft
3 main spans
Daily traffic
828
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Drainage Ditch No. 22 is a concrete continuous slab carrying FM over Drainage Ditch No. 22 in Pocahontas County, Iowa. It was built in 1970, so it is 55 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.

It carries about 828 vehicles a day, roughly 12% of them trucks, projected to reach 828 by 2044. The structure is 125 ft (38.1 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFM
CrossesDrainage Ditch No. 22
Location090312902
RouteCounty Highway 0
CountyPocahontas County
StateIowa
Coordinates42.57989, -94.53971
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 alignment7: Better than present minimum criteria
Operating rating57.5 US tons
Inventory rating33.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length125 ft (38.1 m)
Longest span49 ft (14.9 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic828 (2022)
Projected traffic828 by 2044
Trucks12%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Drainage Ditch No. 22 built?

It was built in 1970, making it 55 years old in 2025.

What condition is FM over Drainage Ditch No. 22 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 October 2024.

How much traffic does FM over Drainage Ditch No. 22 carry?

About 828 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is FM over Drainage Ditch No. 22?

The structure is 125 ft (38.1 m) long with a longest span of 49 ft (14.9 m) and a deck 36 ft wide.

Who owns FM over Drainage Ditch No. 22?

It is owned by the County Highway Agency.