US Bridges

US 63 over Big Bear Creek

Fair

Poweshiek County, Iowa · 1.0 Miles N of W JCT US 6 · Structure no. 000000000045851

Built
1978
47 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
146 ft
3 main spans
Daily traffic
1,820
2022 count
Owner
State
State Highway Agency

About this bridge

US 63 over Big Bear Creek is a prestressed concrete stringer/multi-beam or girder carrying US 63 over Big Bear Creek in Poweshiek County, Iowa. It was built in 1978, so it is 47 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 6 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 1,820 vehicles a day, roughly 24% of them trucks, projected to reach 1,820 by 2044. The structure is 146 ft (44.5 m) long and 47 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesUS 63
CrossesBig Bear Creek
Location1.0 Miles N of W JCT US 6
RouteU.S. Route 63
StateIowa
Coordinates41.76035, -92.59129
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating99.8 US tons
Inventory rating60.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length146 ft (44.5 m)
Longest span62 ft (18.9 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,820 (2022)
Projected traffic1,820 by 2044
Trucks24%
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 US 63 over Big Bear Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is US 63 over Big Bear 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 June 2024.

How much traffic does US 63 over Big Bear Creek carry?

About 1,820 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is US 63 over Big Bear Creek?

The structure is 146 ft (44.5 m) long with a longest span of 62 ft (18.9 m) and a deck 47 ft wide.

Who owns US 63 over Big Bear Creek?

It is owned by the State Highway Agency.