US Bridges

FA-310th ST over Spring Valley Creek

Fair

Mills County, Iowa · 071413202 · Structure no. 000000000245170

Built
1960
65 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
132 ft
3 main spans
Daily traffic
319
2022 count
Owner
County
County Highway Agency

About this bridge

FA-310th ST over Spring Valley Creek is a prestressed concrete stringer/multi-beam or girder carrying FA-310th ST over Spring Valley Creek in Mills County, Iowa. It was built in 1960, so it is 65 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 319 vehicles a day, roughly 17% of them trucks, projected to reach 319 by 2043. The structure is 132 ft (40.2 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFA-310th ST
CrossesSpring Valley Creek
Location071413202
RouteCounty Highway 0
CountyMills County
StateIowa
Coordinates40.9087, -95.59451
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
ScourCountermeasures installed to correct a previously existing problem
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 rating41.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length132 ft (40.2 m)
Longest span43 ft (13.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic319 (2022)
Projected traffic319 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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-310th ST over Spring Valley Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is FA-310th ST over Spring Valley Creek 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-310th ST over Spring Valley Creek carry?

About 319 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is FA-310th ST over Spring Valley Creek?

The structure is 132 ft (40.2 m) long with a longest span of 43 ft (13.1 m) and a deck 26 ft wide.

Who owns FA-310th ST over Spring Valley Creek?

It is owned by the County Highway Agency.