US Bridges

C 25 170th ST over Small Stream

Good

Butler County, Iowa · 092171101 · Structure no. 000000000366520

Built
2019
6 years old
Condition
Good
inspected April 2024
Type
Culvert
Steel
Length
22 ft
2 main spans
Daily traffic
69
2022 count
Owner
County
County Highway Agency

About this bridge

C 25 170th ST over Small Stream is a steel culvert carrying C 25 170th ST over Small Stream in Butler County, Iowa. It was built in 2019, so it is 6 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 69 vehicles a day, projected to reach 69 by 2044. The structure is 22 ft (6.7 m) long and 42 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesC 25 170th ST
CrossesSmall Stream
Location092171101
RouteCounty Highway 0
CountyButler County
StateIowa
Coordinates42.80288, -92.82324
Functional classRural Minor Collector

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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span9 ft (2.7 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69 (2022)
Projected traffic69 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$70,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was C 25 170th ST over Small Stream built?

It was built in 2019, making it 6 years old in 2025.

What condition is C 25 170th 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 April 2024.

How much traffic does C 25 170th ST over Small Stream carry?

About 69 vehicles per day (2022 count).

How long is C 25 170th ST over Small Stream?

The structure is 22 ft (6.7 m) long with a longest span of 9 ft (2.7 m) and a deck 42 ft wide.

Who owns C 25 170th ST over Small Stream?

It is owned by the County Highway Agency.