US Bridges

1600th ST over Small Stream

Good

Shelby County, Iowa · East of Beech RD & 1600th · Structure no. 000000000306721

Built
2012
13 years old
Condition
Good
inspected March 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
62
2022 count
Owner
County
County Highway Agency

About this bridge

1600th ST over Small Stream is a steel stringer/multi-beam or girder carrying 1600th ST over Small Stream in Shelby County, Iowa. It was built in 2012, so it is 13 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 62 vehicles a day, projected to reach 62 by 2043. The structure is 70 ft (21.3 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries1600th ST
CrossesSmall Stream
LocationEast of Beech RD & 1600th
RouteCounty Highway 0
CountyShelby County
StateIowa
Coordinates41.73269, -95.52323
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span69 ft (21 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2022)
Projected traffic62 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 1600th ST over Small Stream built?

It was built in 2012, making it 13 years old in 2025.

What condition is 1600th ST over Small 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 March 2022.

How much traffic does 1600th ST over Small Stream carry?

About 62 vehicles per day (2022 count).

How long is 1600th ST over Small Stream?

The structure is 70 ft (21.3 m) long with a longest span of 69 ft (21 m) and a deck 25 ft wide.

Who owns 1600th ST over Small Stream?

It is owned by the County Highway Agency.