US Bridges

Ia 136 over Deep Creek

Fair

Clinton County, Iowa · 0.2 MI S. of Jct. SR Z2E · Structure no. 000000000021081

Built
1976
49 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
79 ft
3 main spans
Daily traffic
840
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 136 over Deep Creek is a concrete continuous slab carrying Ia 136 over Deep Creek in Clinton County, Iowa. It was built in 1976, so it is 49 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 5 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 840 vehicles a day, roughly 12% of them trucks, projected to reach 840 by 2042. The structure is 79 ft (24.1 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIa 136
CrossesDeep Creek
Location0.2 MI S. of Jct. SR Z2E
RouteState Highway 136
CountyClinton County
StateIowa
Coordinates41.96029, -90.47066
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65.8 US tons
Inventory rating39.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length79 ft (24.1 m)
Longest span29 ft (8.8 m)
Deck width47 ft (14.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic840 (2022)
Projected traffic840 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Deep Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is Ia 136 over Deep 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 April 2023.

How much traffic does Ia 136 over Deep Creek carry?

About 840 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Ia 136 over Deep Creek?

The structure is 79 ft (24.1 m) long with a longest span of 29 ft (8.8 m) and a deck 47 ft wide.

Who owns Ia 136 over Deep Creek?

It is owned by the State Highway Agency.