US Bridges

Ia 141 over I-29

PoorPosted for load

Woodbury County, Iowa · At the Jct. of I-29 · Structure no. 000000000053230

Built
1959
66 years old
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
210 ft
4 main spans
Daily traffic
2,980
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 141 over I-29 is a prestressed concrete stringer/multi-beam or girder carrying Ia 141 over I-29 in Woodbury County, Iowa. It was built in 1959, so it is 66 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for other load-capacity restriction.

It carries about 2,980 vehicles a day, roughly 11% of them trucks, projected to reach 2,980 by 2044. The structure is 210 ft (64 m) long and 36 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesIa 141
CrossesI-29
LocationAt the Jct. of I-29
RouteState Highway 141
CountyWoodbury County
StateIowa
Coordinates42.22884, -96.24239
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.6 US tons
Inventory rating35.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length210 ft (64 m)
Longest span65 ft (19.8 m)
Deck width36 ft (11 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,980 (2022)
Projected traffic2,980 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed14.3 mi (23 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ia 141 over I-29 built?

It was built in 1959, making it 66 years old in 2025.

What condition is Ia 141 over I-29 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Ia 141 over I-29 carry?

About 2,980 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Ia 141 over I-29?

The structure is 210 ft (64 m) long with a longest span of 65 ft (19.8 m) and a deck 36 ft wide.

Who owns Ia 141 over I-29?

It is owned by the State Highway Agency.