US Bridges

Ia 136 over Union Creek

Fair

Clinton County, Iowa · 0.1 Mi. S of Jct. US 61 · Structure no. 000000000021111

Built
1995
30 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
1,150
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 136 over Union Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 136 over Union Creek in Clinton County, Iowa. It was built in 1995, so it is 30 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 1,150 vehicles a day, roughly 9% of them trucks, projected to reach 1,150 by 2044. The structure is 71 ft (21.6 m) long and 39 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesIa 136
CrossesUnion Creek
Location0.1 Mi. S of Jct. US 61
RouteState Highway 136
CountyClinton County
StateIowa
Coordinates42.00363, -90.65517
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating49.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span64 ft (19.5 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,150 (2022)
Projected traffic1,150 by 2044
Trucks9%
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 Ia 136 over Union Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Ia 136 over Union 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 May 2024.

How much traffic does Ia 136 over Union Creek carry?

About 1,150 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Ia 136 over Union Creek?

The structure is 71 ft (21.6 m) long with a longest span of 64 ft (19.5 m) and a deck 39 ft wide.

Who owns Ia 136 over Union Creek?

It is owned by the State Highway Agency.