US Bridges

EB Ia 141 over Frog Creek

Fair

Dallas County, Iowa · 0.1 Mile W of JCT Ia 144 · Structure no. 000000000607153

Built
1976
49 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
111 ft
3 main spans
Daily traffic
2,255
2023 count
Owner
State
State Highway Agency

About this bridge

EB Ia 141 over Frog Creek is a concrete continuous slab carrying EB Ia 141 over Frog Creek in Dallas 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 2,255 vehicles a day, roughly 12% of them trucks, projected to reach 2,255 by 2043. The structure is 111 ft (33.8 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesEB Ia 141
CrossesFrog Creek
Location0.1 Mile W of JCT Ia 144
RouteState Highway 141
CountyDallas County
StateIowa
Coordinates41.8303, -94.10868
Functional classUrban Other Principal 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 protection7 GoodSome minor problems.
Last inspectionJuly 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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64.2 US tons
Inventory rating38.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length111 ft (33.8 m)
Longest span40 ft (12.2 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,255 (2023)
Projected traffic2,255 by 2043
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 EB Ia 141 over Frog Creek built?

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

What condition is EB Ia 141 over Frog 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 July 2023.

How much traffic does EB Ia 141 over Frog Creek carry?

About 2,255 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is EB Ia 141 over Frog Creek?

The structure is 111 ft (33.8 m) long with a longest span of 40 ft (12.2 m) and a deck 44 ft wide.

Who owns EB Ia 141 over Frog Creek?

It is owned by the State Highway Agency.