FM over Pierson Creek

Fair

Woodbury County, Iowa · 0894207 · Structure no. 000000000354561

Built: 1976; 49 years old
Condition: Fair; inspected June 2023
Type: Culvert; Concrete Continuous
Length: 38 ft; 3 main spans
Daily traffic: 211; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Pierson Creek is a concrete continuous culvert carrying FM over Pierson Creek in Woodbury 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 6 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 211 vehicles a day, roughly 18% of them trucks, projected to reach 211 by 2043. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps

CarriesFM

CrossesPierson Creek

Location0894207

RouteCity Street 0

CountyWoodbury County

StateIowa

Coordinates42.53758, -95.85962

Functional classRural Minor Collector

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
Channel and channel protection	7 Good	Some minor problems.
Culvert	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionJune 2023

Inspection intervalevery 48 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating48.6 US tons

Inventory rating36 US tons

Structure

Structure typeCulvert

MaterialConcrete Continuous

DeckNot applicable

Main spans3

Design loadHS 20

Structure length38 ft (11.6 m)

Longest span13 ft (4 m)

Deck width0 ft (0 m)

Roadway width0 ft (0 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic211 (2022)

Projected traffic211 by 2043

Trucks18%

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$30,000 (2023 estimate)

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Pierson Creek built?

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

What condition is FM over Pierson 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 June 2023.

How much traffic does FM over Pierson Creek carry?

About 211 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is FM over Pierson Creek?

The structure is 38 ft (11.6 m) long with a longest span of 13 ft (4 m).

Who owns FM over Pierson Creek?

It is owned by the County Highway Agency.