US Bridges

Local over South Fork Middle River

PoorPosted for load

Guthrie County, Iowa · 078332602 · Structure no. 000000000167580

Built
1971
54 years old
Condition
Poor
inspected November 2023
Type
Tee Beam
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

Local over South Fork Middle River is a prestressed concrete tee beam carrying Local over South Fork Middle River in Guthrie County, Iowa. It was built in 1971, so it is 54 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 40 vehicles a day, projected to reach 40 by 2043. The structure is 32 ft (9.8 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesLocal
CrossesSouth Fork Middle River
Location078332602
RouteCounty Highway 0
StateIowa
Coordinates41.52972, -94.62437
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating28.3 US tons
Inventory rating21.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2022)
Projected traffic40 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 South Fork Middle River built?

It was built in 1971, making it 54 years old in 2025.

What condition is Local over South Fork Middle River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does Local over South Fork Middle River carry?

About 40 vehicles per day (2022 count).

How long is Local over South Fork Middle River?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 20 ft wide.

Who owns Local over South Fork Middle River?

It is owned by the County Highway Agency.