US Bridges

US 59 over Silver Creek

Fair

Ida County, Iowa · 1.1 MI N of N JCT SR D15 · Structure no. 000000000029150

Built
1972
53 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
88 ft
3 main spans
Daily traffic
2,090
2023 count
Owner
State
State Highway Agency

About this bridge

US 59 over Silver Creek is a concrete continuous slab carrying US 59 over Silver Creek in Ida County, Iowa. It was built in 1972, so it is 53 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 2,090 vehicles a day, roughly 22% of them trucks, projected to reach 2,090 by 2043. The structure is 88 ft (26.8 m) long and 47 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesUS 59
CrossesSilver Creek
Location1.1 MI N of N JCT SR D15
RouteU.S. Route 59
StateIowa
Coordinates42.53466, -95.54516
Functional classRural Principal Arterial - Other

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating34.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length88 ft (26.8 m)
Longest span33 ft (10.1 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,090 (2023)
Projected traffic2,090 by 2043
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes

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 US 59 over Silver Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is US 59 over Silver 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 October 2023.

How much traffic does US 59 over Silver Creek carry?

About 2,090 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is US 59 over Silver Creek?

The structure is 88 ft (26.8 m) long with a longest span of 33 ft (10.1 m) and a deck 47 ft wide.

Who owns US 59 over Silver Creek?

It is owned by the State Highway Agency.