US Bridges

Ia 92 over Drainage Ditch #25

Fair

Louisa County, Iowa · 5.5 Mi. W of S Jct. US 61 · Structure no. 000000000034131

Built
1976
49 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
3,410
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 92 over Drainage Ditch #25 is a concrete continuous slab carrying Ia 92 over Drainage Ditch #25 in Louisa County, Iowa. It was built in 1976, so it is 49 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 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 3,410 vehicles a day, roughly 22% of them trucks, projected to reach 3,410 by 2043. The structure is 73 ft (22.3 m) long and 47 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesIa 92
CrossesDrainage Ditch #25
Location5.5 Mi. W of S Jct. US 61
RouteState Highway 92
CountyLouisa County
StateIowa
Coordinates41.27732, -91.30216
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.2 US tons
Inventory rating35.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span28 ft (8.5 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,410 (2023)
Projected traffic3,410 by 2043
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 92 over Drainage Ditch #25 built?

It was built in 1976, making it 49 years old in 2025.

What condition is Ia 92 over Drainage Ditch #25 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 February 2024.

How much traffic does Ia 92 over Drainage Ditch #25 carry?

About 3,410 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is Ia 92 over Drainage Ditch #25?

The structure is 73 ft (22.3 m) long with a longest span of 28 ft (8.5 m) and a deck 47 ft wide.

Who owns Ia 92 over Drainage Ditch #25?

It is owned by the State Highway Agency.