US Bridges

Local RD over South River

Fair

Madison County, Iowa · 074263401 · Structure no. 000000000231841

Built
1991
34 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
79
2022 count
Owner
County
County Highway Agency

About this bridge

Local RD over South River is a concrete continuous slab carrying Local RD over South River in Madison County, Iowa. It was built in 1991, so it is 34 years old, younger 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 79 vehicles a day, projected to reach 79 by 2043. The structure is 128 ft (39 m) long and 27 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesLocal RD
CrossesSouth River
Location074263401
RouteCounty Highway 0
CountyMadison County
StateIowa
Coordinates41.17469, -93.82788
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating97 US tons
Inventory rating58.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (39 m)
Longest span39 ft (11.9 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2022)
Projected traffic79 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Local RD over South River built?

It was built in 1991, making it 34 years old in 2025.

What condition is Local RD over South River 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 August 2023.

How much traffic does Local RD over South River carry?

About 79 vehicles per day (2022 count).

How long is Local RD over South River?

The structure is 128 ft (39 m) long with a longest span of 39 ft (11.9 m) and a deck 27 ft wide.

Who owns Local RD over South River?

It is owned by the County Highway Agency.