US Bridges

FA-315th ST over Raines Branch

Fair

Mills County, Iowa · 072413208 · Structure no. 000000000245970

Built
1947
78 years old, rebuilt 1963
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
1,246
2022 count
Owner
County
County Highway Agency

About this bridge

FA-315th ST over Raines Branch is a concrete continuous slab carrying FA-315th ST over Raines Branch in Mills County, Iowa. It was built in 1947 and reconstructed in 1963, so it is 78 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 1,246 vehicles a day, projected to reach 1,246 by 2043. The structure is 100 ft (30.5 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFA-315th ST
CrossesRaines Branch
Location072413208
RouteCounty Highway 0
CountyMills County
StateIowa
Coordinates40.99736, -95.58516
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.1 US tons
Inventory rating33.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length100 ft (30.5 m)
Longest span39 ft (11.9 m)
Deck width35 ft (10.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,246 (2022)
Projected traffic1,246 by 2043
Trucks0%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FA-315th ST over Raines Branch built?

It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1963.

What condition is FA-315th ST over Raines Branch 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 March 2023.

How much traffic does FA-315th ST over Raines Branch carry?

About 1,246 vehicles per day (2022 count).

How long is FA-315th ST over Raines Branch?

The structure is 100 ft (30.5 m) long with a longest span of 39 ft (11.9 m) and a deck 35 ft wide.

Who owns FA-315th ST over Raines Branch?

It is owned by the County Highway Agency.