US Bridges

US 59 over Grey Creek

Good

Cherokee County, Iowa · 0.7 Mi. S of Jct. SR C16 · Structure no. 000000000019391

Built
1985
40 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
134 ft
3 main spans
Daily traffic
2,070
2023 count
Owner
State
State Highway Agency

About this bridge

US 59 over Grey Creek is a prestressed concrete stringer/multi-beam or girder carrying US 59 over Grey Creek in Cherokee County, Iowa. It was built in 1985, so it is 40 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 2,070 vehicles a day, roughly 13% of them trucks, projected to reach 2,070 by 2043. The structure is 134 ft (40.8 m) long and 43 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesUS 59
CrossesGrey Creek
Location0.7 Mi. S of Jct. SR C16
RouteU.S. Route 59
StateIowa
Coordinates42.85511, -95.55083
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 protection7 GoodSome minor problems.
Last inspectionJune 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.8 US tons
Inventory rating43 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span61 ft (18.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,070 (2023)
Projected traffic2,070 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 US 59 over Grey Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is US 59 over Grey 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 June 2023.

How much traffic does US 59 over Grey Creek carry?

About 2,070 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 59 over Grey Creek?

The structure is 134 ft (40.8 m) long with a longest span of 61 ft (18.6 m) and a deck 43 ft wide.

Who owns US 59 over Grey Creek?

It is owned by the State Highway Agency.