FM C-60 over Dry Branch

Good

Plymouth County, Iowa · 090440901 · Structure no. 000000000270911

Built: 1992; 33 years old
Condition: Good; inspected August 2024
Type: Slab; Concrete Continuous
Length: 103 ft; 3 main spans
Daily traffic: 439; 2022 count
Owner: County; County Highway Agency

About this bridge

FM C-60 over Dry Branch is a concrete continuous slab carrying FM C-60 over Dry Branch in Plymouth County, Iowa. It was built in 1992, so it is 33 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 439 vehicles a day, projected to reach 439 by 2044. The structure is 103 ft (31.4 m) long and 32 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesFM C-60

CrossesDry Branch

Location090440901

RouteCounty Highway 0

CountyPlymouth County

StateIowa

Coordinates42.63319, -96.04367

Functional classRural Major Collector

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	8 Very Good	No problems noted.
Superstructure	8 Very Good	No problems noted.
Substructure	8 Very Good	No problems noted.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionAugust 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation8: Equal to present desirable criteria

Deck geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating88.6 US tons

Inventory rating53.1 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length103 ft (31.4 m)

Longest span41 ft (12.5 m)

Deck width32 ft (9.9 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic439 (2022)

Projected traffic439 by 2044

Trucks0%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed8.1 mi (13 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 proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM C-60 over Dry Branch built?

It was built in 1992, making it 33 years old in 2025.

What condition is FM C-60 over Dry Branch 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 August 2024.

How much traffic does FM C-60 over Dry Branch carry?

About 439 vehicles per day (2022 count).

How long is FM C-60 over Dry Branch?

The structure is 103 ft (31.4 m) long with a longest span of 41 ft (12.5 m) and a deck 32 ft wide.

Who owns FM C-60 over Dry Branch?

It is owned by the County Highway Agency.