US Bridges

Ia 5 NB over Coal Creek

Fair

Warren County, Iowa · 0.7 Mi. N of Ia 316 · Structure no. 000000000050980

Built
1966
59 years old
Condition
Fair
inspected April 2022
Type
Girder and Floorbeam System
Steel Continuous
Length
246 ft
3 main spans
Daily traffic
4,300
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 5 NB over Coal Creek is a steel continuous girder and floorbeam system carrying Ia 5 NB over Coal Creek in Warren County, Iowa. It was built in 1966, so it is 59 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 4,300 vehicles a day, roughly 10% of them trucks, projected to reach 4,300 by 2042. The structure is 246 ft (75 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIa 5 NB
CrossesCoal Creek
Location0.7 Mi. N of Ia 316
RouteState Highway 5
CountyWarren County
StateIowa
Coordinates41.43904, -93.34242
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2022
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating29.2 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length246 ft (75 m)
Longest span94 ft (28.7 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2022)
Projected traffic4,300 by 2042
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 5 NB over Coal Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is Ia 5 NB over Coal 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 April 2022.

How much traffic does Ia 5 NB over Coal Creek carry?

About 4,300 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Ia 5 NB over Coal Creek?

The structure is 246 ft (75 m) long with a longest span of 94 ft (28.7 m) and a deck 36 ft wide.

Who owns Ia 5 NB over Coal Creek?

It is owned by the State Highway Agency.