FM over Drainage Ditch No 96

Fair

Webster County, Iowa · 088292702 · Structure no. 000000000342781

Built: 1976; 49 years old
Condition: Fair; inspected November 2023
Type: Slab; Concrete Continuous
Length: 78 ft; 3 main spans
Daily traffic: 429; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Drainage Ditch No 96 is a concrete continuous slab carrying FM over Drainage Ditch No 96 in Webster 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 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 429 vehicles a day, roughly 15% of them trucks, projected to reach 429 by 2043. The structure is 78 ft (23.8 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesFM

CrossesDrainage Ditch No 96

Location088292702

RouteCounty Highway 0

CountyWebster County

StateIowa

Coordinates42.40931, -94.22313

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
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	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionNovember 2023

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 geometry6: Equal to present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating57.8 US tons

Inventory rating36.4 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length78 ft (23.8 m)

Longest span29 ft (8.8 m)

Deck width32 ft (9.8 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic429 (2022)

Projected traffic429 by 2043

Trucks15%

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$990,000 (2024 estimate)

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Drainage Ditch No 96 built?

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

What condition is FM over Drainage Ditch No 96 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 November 2023.

How much traffic does FM over Drainage Ditch No 96 carry?

About 429 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is FM over Drainage Ditch No 96?

The structure is 78 ft (23.8 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns FM over Drainage Ditch No 96?

It is owned by the County Highway Agency.