US Bridges

Ia 14 over South Timber Creek

Good

Marshall County, Iowa · 0.1 Mi. N of S JCT SR E63 · Structure no. 000000000035361

Built
1985
40 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
150 ft
3 main spans
Daily traffic
3,920
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 14 over South Timber Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 14 over South Timber Creek in Marshall County, Iowa. It was built in 1985, so it is 40 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,920 vehicles a day, roughly 9% of them trucks, projected to reach 3,920 by 2044. The structure is 150 ft (45.7 m) long and 47 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesIa 14
CrossesSouth Timber Creek
Location0.1 Mi. N of S JCT SR E63
RouteState Highway 14
StateIowa
Coordinates41.93665, -92.91677
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating82.8 US tons
Inventory rating49.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span57 ft (17.4 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,920 (2022)
Projected traffic3,920 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Ia 14 over South Timber Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is Ia 14 over South Timber Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does Ia 14 over South Timber Creek carry?

About 3,920 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Ia 14 over South Timber Creek?

The structure is 150 ft (45.7 m) long with a longest span of 57 ft (17.4 m) and a deck 47 ft wide.

Who owns Ia 14 over South Timber Creek?

It is owned by the State Highway Agency.