US Bridges

Ia 57 over Hammers Creek

Good

Grundy County, Iowa · 3.4 Mi. E of E JCT SR T55 · Structure no. 000000000025811

Built
1986
39 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
113 ft
3 main spans
Daily traffic
2,580
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 57 over Hammers Creek is a concrete continuous slab carrying Ia 57 over Hammers Creek in Grundy County, Iowa. It was built in 1986, so it is 39 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 2,580 vehicles a day, roughly 6% of them trucks, projected to reach 2,580 by 2043. The structure is 113 ft (34.4 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesIa 57
CrossesHammers Creek
Location3.4 Mi. E of E JCT SR T55
RouteState Highway 57
StateIowa
Coordinates42.54235, -92.56581
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 protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94 US tons
Inventory rating56 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span43 ft (13.1 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,580 (2023)
Projected traffic2,580 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 57 over Hammers Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Ia 57 over Hammers 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 April 2024.

How much traffic does Ia 57 over Hammers Creek carry?

About 2,580 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Ia 57 over Hammers Creek?

The structure is 113 ft (34.4 m) long with a longest span of 43 ft (13.1 m) and a deck 43 ft wide.

Who owns Ia 57 over Hammers Creek?

It is owned by the State Highway Agency.