US Bridges

Ia 83 over Compton Creek

Fair

Cass County, Iowa · 0.1 Mi. W of Jct. SR M56 · Structure no. 000000000017770

Built
1936
89 years old, rebuilt 1991
Condition
Fair
inspected March 2024
Type
Culvert
Concrete Continuous
Length
20 ft
2 main spans
Daily traffic
760
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 83 over Compton Creek is a concrete continuous culvert carrying Ia 83 over Compton Creek in Cass County, Iowa. It was built in 1936 and reconstructed in 1991, so it is 89 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 760 vehicles a day, roughly 13% of them trucks, projected to reach 760 by 2044. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 18 mi (29 km).

CarriesIa 83
CrossesCompton Creek
Location0.1 Mi. W of Jct. SR M56
RouteState Highway 83
StateIowa
Coordinates41.44675, -95.11436
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.1 US tons
Inventory rating0 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length20 ft (6.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic760 (2022)
Projected traffic760 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 km)
TollOn a free road
National Highway SystemNo

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 83 over Compton Creek built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1991.

What condition is Ia 83 over Compton Creek 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 March 2024.

How much traffic does Ia 83 over Compton Creek carry?

About 760 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is Ia 83 over Compton Creek?

The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m).

Who owns Ia 83 over Compton Creek?

It is owned by the State Highway Agency.