US Bridges

US 218 over Stream

Good

Mitchell County, Iowa · 1.0 Mile North of SR A19 · Structure no. 000000000036460

Built
1967
58 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
2,530
2022 count
Owner
State
State Highway Agency

About this bridge

US 218 over Stream is a concrete continuous culvert carrying US 218 over Stream in Mitchell County, Iowa. It was built in 1967, so it is 58 years old, older 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 2,530 vehicles a day, roughly 14% of them trucks, projected to reach 2,530 by 2042. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 6.8 mi (11 km).

CarriesUS 218
CrossesStream
Location1.0 Mile North of SR A19
RouteU.S. Route 218
StateIowa
Coordinates43.47228, -92.92542
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.2 US tons
Inventory rating24 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,530 (2022)
Projected traffic2,530 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

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 218 over Stream built?

It was built in 1967, making it 58 years old in 2025.

What condition is US 218 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 August 2023.

How much traffic does US 218 over Stream carry?

About 2,530 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is US 218 over Stream?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m).

Who owns US 218 over Stream?

It is owned by the State Highway Agency.