US Bridges

US 59 over Grey Creek Overflow

Fair

Cherokee County, Iowa · 0.2 Mi. N SR C16 · Structure no. 000000000019401

Built
1986
39 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
1,720
2023 count
Owner
State
State Highway Agency

About this bridge

US 59 over Grey Creek Overflow is a prestressed concrete stringer/multi-beam or girder carrying US 59 over Grey Creek Overflow in Cherokee 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 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 1,720 vehicles a day, roughly 16% of them trucks, projected to reach 1,720 by 2043. The structure is 66 ft (20.1 m) long and 43 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesUS 59
CrossesGrey Creek Overflow
Location0.2 Mi. N SR C16
RouteU.S. Route 59
CountyCherokee County
StateIowa
Coordinates42.86784, -95.54514
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.7 US tons
Inventory rating50.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span63 ft (19.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,720 (2023)
Projected traffic1,720 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Overflow built?

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

What condition is US 59 over Grey Creek Overflow 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 June 2023.

How much traffic does US 59 over Grey Creek Overflow carry?

About 1,720 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is US 59 over Grey Creek Overflow?

The structure is 66 ft (20.1 m) long with a longest span of 63 ft (19.2 m) and a deck 43 ft wide.

Who owns US 59 over Grey Creek Overflow?

It is owned by the State Highway Agency.