US Bridges

Ia 76 over Waterloo Creek

Fair

Allamakee County, Iowa · 0.5 Mi. N of Jct. SR A26 · Structure no. 000000000013680

Built
1929
96 years old, rebuilt 1955
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
210 ft
3 main spans
Daily traffic
860
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 76 over Waterloo Creek is a steel continuous stringer/multi-beam or girder carrying Ia 76 over Waterloo Creek in Allamakee County, Iowa. It was built in 1929 and reconstructed in 1955, so it is 96 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 860 vehicles a day, roughly 19% of them trucks, projected to reach 860 by 2044. The structure is 210 ft (64 m) long and 32 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIa 76
CrossesWaterloo Creek
Location0.5 Mi. N of Jct. SR A26
RouteState Highway 76
CountyAllamakee County
StateIowa
Coordinates43.43254, -91.51927
Functional classRural Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.8 US tons
Inventory rating26.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length210 ft (64 m)
Longest span110 ft (33.5 m)
Deck width32 ft (9.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic860 (2022)
Projected traffic860 by 2044
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 76 over Waterloo Creek built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1955.

What condition is Ia 76 over Waterloo 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 August 2024.

How much traffic does Ia 76 over Waterloo Creek carry?

About 860 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is Ia 76 over Waterloo Creek?

The structure is 210 ft (64 m) long with a longest span of 110 ft (33.5 m) and a deck 32 ft wide.

Who owns Ia 76 over Waterloo Creek?

It is owned by the State Highway Agency.