Local over Otter Creek

Fair

Louisa County, Iowa · 073040101 · Structure no. 000000000223761

Built: 1972; 53 years old
Condition: Fair; inspected May 2024
Type: Slab; Concrete Continuous
Length: 105 ft; 3 main spans
Daily traffic: 35; 2022 count
Owner: County; County Highway Agency

About this bridge

Local over Otter Creek is a concrete continuous slab carrying Local over Otter Creek in Louisa County, Iowa. It was built in 1972, so it is 53 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 35 vehicles a day, projected to reach 35 by 2044. The structure is 105 ft (32 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLocal

CrossesOtter Creek

Location073040101

RouteCounty Highway 0

CountyLouisa County

StateIowa

Coordinates41.16127, -91.26286

Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionMay 2024

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 alignment7: Better than present minimum criteria

Operating rating54.9 US tons

Inventory rating33.1 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length105 ft (32 m)

Longest span39 ft (11.9 m)

Deck width32 ft (9.8 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2022)

Projected traffic35 by 2044

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed5 mi (8 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—

NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Otter Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Local over Otter 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 Local over Otter Creek carry?

About 35 vehicles per day (2022 count).

How long is Local over Otter Creek?

The structure is 105 ft (32 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.

Who owns Local over Otter Creek?

It is owned by the County Highway Agency.