US Bridges

Ia 26 over Enterprise Creek

Good

Allamakee County, Iowa · 3.7 Mi. N of Jct. Ia. 9 · Structure no. 000000000013531

Built
1995
30 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
179 ft
3 main spans
Daily traffic
1,540
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 26 over Enterprise Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 26 over Enterprise Creek in Allamakee County, Iowa. It was built in 1995, so it is 30 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,540 vehicles a day, roughly 8% of them trucks, projected to reach 1,540 by 2044. The structure is 179 ft (54.6 m) long and 41 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesIa 26
CrossesEnterprise Creek
Location3.7 Mi. N of Jct. Ia. 9
RouteState Highway 26
CountyAllamakee County
StateIowa
Coordinates43.40853, -91.25827
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.8 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length179 ft (54.6 m)
Longest span68 ft (20.7 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,540 (2022)
Projected traffic1,540 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 26 over Enterprise Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Ia 26 over Enterprise Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does Ia 26 over Enterprise Creek carry?

About 1,540 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Ia 26 over Enterprise Creek?

The structure is 179 ft (54.6 m) long with a longest span of 68 ft (20.7 m) and a deck 41 ft wide.

Who owns Ia 26 over Enterprise Creek?

It is owned by the State Highway Agency.