US Bridges

US 63 over Stream

Good

Mahaska County, Iowa · 5.2 Miles N of JCT Ia 137 · Structure no. 000000000035081

Built
1982
43 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
6,350
2022 count
Owner
State
State Highway Agency

About this bridge

US 63 over Stream is a prestressed concrete stringer/multi-beam or girder carrying US 63 over Stream in Mahaska County, Iowa. It was built in 1982, so it is 43 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 6,350 vehicles a day, roughly 19% of them trucks, projected to reach 6,350 by 2042. The structure is 71 ft (21.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 63
CrossesStream
Location5.2 Miles N of JCT Ia 137
RouteU.S. Route 63
StateIowa
Coordinates41.22161, -92.64047
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating89.3 US tons
Inventory rating33.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span68 ft (20.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,350 (2022)
Projected traffic6,350 by 2042
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Stream built?

It was built in 1982, making it 43 years old in 2025.

What condition is US 63 over Stream 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 February 2024.

How much traffic does US 63 over Stream carry?

About 6,350 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is US 63 over Stream?

The structure is 71 ft (21.6 m) long with a longest span of 68 ft (20.7 m) and a deck 43 ft wide.

Who owns US 63 over Stream?

It is owned by the State Highway Agency.