US Bridges

493rd ST over Stream

Good

Appanoose County, Iowa · 069172103 · Structure no. 000000000065241

Built
2011
14 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
82
2022 count
Owner
County
County Highway Agency

About this bridge

493rd ST over Stream is a concrete continuous slab carrying 493rd ST over Stream in Appanoose County, Iowa. It was built in 2011, so it is 14 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 82 vehicles a day, projected to reach 82 by 2043. The structure is 103 ft (31.4 m) long and 27 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
Carries493rd ST
CrossesStream
Location069172103
RouteCounty Highway 0
CountyAppanoose County
StateIowa
Coordinates40.7676, -92.82253
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length103 ft (31.4 m)
Longest span39 ft (11.9 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic82 (2022)
Projected traffic82 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 493rd ST over Stream built?

It was built in 2011, making it 14 years old in 2025.

What condition is 493rd ST 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 October 2023.

How much traffic does 493rd ST over Stream carry?

About 82 vehicles per day (2022 count).

How long is 493rd ST over Stream?

The structure is 103 ft (31.4 m) long with a longest span of 39 ft (11.9 m) and a deck 27 ft wide.

Who owns 493rd ST over Stream?

It is owned by the County Highway Agency.