US Bridges

Ia 4 over E Br Lake Creek

Good

Calhoun County, Iowa · 3.5 Mi. N of N JCT Ia 175 · Structure no. 000000000016931

Built
1991
34 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete Continuous
Length
123 ft
3 main spans
Daily traffic
1,120
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 4 over E Br Lake Creek is a concrete continuous slab carrying Ia 4 over E Br Lake Creek in Calhoun County, Iowa. It was built in 1991, so it is 34 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 1,120 vehicles a day, roughly 18% of them trucks, projected to reach 1,120 by 2044. The structure is 123 ft (37.5 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesIa 4
CrossesE Br Lake Creek
Location3.5 Mi. N of N JCT Ia 175
RouteState Highway 4
StateIowa
Coordinates42.31917, -94.64909
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating95.1 US tons
Inventory rating57.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length123 ft (37.5 m)
Longest span47 ft (14.3 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,120 (2022)
Projected traffic1,120 by 2044
Trucks18%
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 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 4 over E Br Lake Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Ia 4 over E Br Lake 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 July 2024.

How much traffic does Ia 4 over E Br Lake Creek carry?

About 1,120 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Ia 4 over E Br Lake Creek?

The structure is 123 ft (37.5 m) long with a longest span of 47 ft (14.3 m) and a deck 43 ft wide.

Who owns Ia 4 over E Br Lake Creek?

It is owned by the State Highway Agency.