US Bridges

Local 40th ST over Blank CR

PoorPosted for load

Howard County, Iowa · 100132501 · Structure no. 000000000183880

Built
1953
72 years old, rebuilt 1986
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
90 ft
3 main spans
Daily traffic
51
2022 count
Owner
County
County Highway Agency

About this bridge

Local 40th ST over Blank CR is a steel stringer/multi-beam or girder carrying Local 40th ST over Blank CR in Howard County, Iowa. It was built in 1953 and reconstructed in 1986, so it is 72 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 51 vehicles a day, projected to reach 51 by 2044. The structure is 90 ft (27.4 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLocal 40th ST
CrossesBlank CR
Location100132501
RouteCounty Highway 0
CountyHoward County
StateIowa
Coordinates43.45798, -92.32149
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating22.9 US tons
Inventory rating15.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans3
Design loadUnknown
Structure length90 ft (27.4 m)
Longest span30 ft (9.1 m)
Deck width23 ft (6.9 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2022)
Projected traffic51 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local 40th ST over Blank CR built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1986.

What condition is Local 40th ST over Blank CR 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 40th ST over Blank CR carry?

About 51 vehicles per day (2022 count).

How long is Local 40th ST over Blank CR?

The structure is 90 ft (27.4 m) long with a longest span of 30 ft (9.1 m) and a deck 23 ft wide.

Who owns Local 40th ST over Blank CR?

It is owned by the County Highway Agency.