US Bridges

Main ST L43 over Bacon Creek

Poor

Woodbury County, Iowa · 088410108 · Structure no. 000000000352748

Built
1958
67 years old
Condition
Poor
inspected June 2023
Type
Slab
Concrete Continuous
Length
115 ft
3 main spans
Daily traffic
383
2022 count
Owner
County
County Highway Agency

About this bridge

Main ST L43 over Bacon Creek is a concrete continuous slab carrying Main ST L43 over Bacon Creek in Woodbury County, Iowa. It was built in 1958, so it is 67 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.

It carries about 383 vehicles a day, roughly 7% of them trucks, projected to reach 383 by 2043. The structure is 115 ft (35.1 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMain ST L43
CrossesBacon Creek
Location088410108
RouteCity Street 0
StateIowa
Coordinates42.46785, -95.67442
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.4 US tons
Inventory rating35.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length115 ft (35.1 m)
Longest span42 ft (12.8 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic383 (2022)
Projected traffic383 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.8 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Main ST L43 over Bacon Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Main ST L43 over Bacon Creek 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 June 2023.

How much traffic does Main ST L43 over Bacon Creek carry?

About 383 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Main ST L43 over Bacon Creek?

The structure is 115 ft (35.1 m) long with a longest span of 42 ft (12.8 m) and a deck 33 ft wide.

Who owns Main ST L43 over Bacon Creek?

It is owned by the County Highway Agency.