Local over Otter Creek

Good

Louisa County, Iowa · 073030401 · Structure no. 000000000223601

Built: 1978; 47 years old
Condition: Good; inspected June 2023
Type: Slab; Concrete Continuous
Length: 127 ft; 3 main spans
Daily traffic: 91; 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 1978, so it is 47 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 91 vehicles a day, projected to reach 91 by 2043. The structure is 127 ft (38.7 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps

CarriesLocal

CrossesOtter Creek

Location073030401

RouteCounty Highway 0

CountyLouisa County

StateIowa

Coordinates41.16053, -91.21144

Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionJune 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation7: Better than present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating57.5 US tons

Inventory rating33.5 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length127 ft (38.7 m)

Longest span49 ft (14.9 m)

Deck width30 ft (9.1 m)

Roadway width28 ft (8.5 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic91 (2022)

Projected traffic91 by 2043

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.9 mi (3 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 proposedOther structural work, including hydraulic replacements

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Otter Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Local over Otter Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does Local over Otter Creek carry?

About 91 vehicles per day (2022 count).

How long is Local over Otter Creek?

The structure is 127 ft (38.7 m) long with a longest span of 49 ft (14.9 m) and a deck 30 ft wide.

Who owns Local over Otter Creek?

It is owned by the County Highway Agency.