US Bridges

CO RD W15 over Small Stream

Poor

Keokuk County, Iowa · 074100206 · Structure no. 000000000032650

Built
1932
93 years old, rebuilt 1959
Condition
Poor
inspected March 2024
Type
Culvert
Concrete
Length
30 ft
1 main span
Daily traffic
620
2022 count
Owner
County
County Highway Agency

About this bridge

CO RD W15 over Small Stream is a concrete culvert carrying CO RD W15 over Small Stream in Keokuk County, Iowa. It was built in 1932 and reconstructed in 1959, so it is 93 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.

It carries about 620 vehicles a day, roughly 20% of them trucks, projected to reach 620 by 2044. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCO RD W15
CrossesSmall Stream
Location074100206
RouteCounty Highway 0
CountyKeokuk County
StateIowa
Coordinates41.2369, -91.97858
Functional classRural Major Collector

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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic620 (2022)
Projected traffic620 by 2044
Trucks20%
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$403,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CO RD W15 over Small Stream built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1959.

What condition is CO RD W15 over Small Stream 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 March 2024.

How much traffic does CO RD W15 over Small Stream carry?

About 620 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is CO RD W15 over Small Stream?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m).

Who owns CO RD W15 over Small Stream?

It is owned by the County Highway Agency.