US Bridges

Local 25th ST over Upper Iowa River

PoorPosted for load

Howard County, Iowa · 100131303 · Structure no. 000000000183840

Built
1880
145 years old, rebuilt 1980
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
114 ft
3 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

Local 25th ST over Upper Iowa River is a steel stringer/multi-beam or girder carrying Local 25th ST over Upper Iowa River in Howard County, Iowa. It was built in 1880 and reconstructed in 1980, so it is 145 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 26 vehicles a day, projected to reach 26 by 2044. The structure is 114 ft (34.7 m) long and 18 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLocal 25th ST
CrossesUpper Iowa River
Location100131303
RouteCounty Highway 0
CountyHoward County
StateIowa
Coordinates43.4797, -92.33578
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans3 (+2 approach)
Design loadUnknown
Structure length114 ft (34.7 m)
Longest span33 ft (10.1 m)
Deck width18 ft (5.6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2044
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local 25th ST over Upper Iowa River built?

It was built in 1880, making it 145 years old in 2025. It was reconstructed in 1980.

What condition is Local 25th ST over Upper Iowa River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Local 25th ST over Upper Iowa River carry?

About 26 vehicles per day (2022 count).

How long is Local 25th ST over Upper Iowa River?

The structure is 114 ft (34.7 m) long with a longest span of 33 ft (10.1 m) and a deck 18 ft wide.

Who owns Local 25th ST over Upper Iowa River?

It is owned by the County Highway Agency.