US Bridges

US 59 over Mill Creek

Fair

Cherokee County, Iowa · 0.9 Mi. N of Jct. Ia 3 · Structure no. 000000000019371

Built
1985
40 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
486 ft
5 main spans
Daily traffic
2,070
2023 count
Owner
State
State Highway Agency

About this bridge

US 59 over Mill Creek is a prestressed concrete stringer/multi-beam or girder carrying US 59 over Mill 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 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 2,070 vehicles a day, roughly 13% of them trucks, projected to reach 2,070 by 2044. The structure is 486 ft (148.1 m) long and 43 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesUS 59
CrossesMill Creek
Location0.9 Mi. N of Jct. Ia 3
RouteU.S. Route 59
StateIowa
Coordinates42.78486, -95.55251
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating87.1 US tons
Inventory rating34.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length486 ft (148.1 m)
Longest span97 ft (29.6 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 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Mill Creek built?

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

What condition is US 59 over Mill 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 November 2024.

How much traffic does US 59 over Mill Creek carry?

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

How long is US 59 over Mill Creek?

The structure is 486 ft (148.1 m) long with a longest span of 97 ft (29.6 m) and a deck 43 ft wide.

Who owns US 59 over Mill Creek?

It is owned by the State Highway Agency.