US Bridges

Griffith over Small Stream

Fair

Clarke County, Iowa · 072242703 · Structure no. 000000000502340

Built
1969
56 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
67
2022 count
Owner
County
County Highway Agency

About this bridge

Griffith over Small Stream is a concrete continuous culvert carrying Griffith over Small Stream in Clarke County, Iowa. It was built in 1969, so it is 56 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 67 vehicles a day, roughly 7% of them trucks, projected to reach 67 by 2044. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesGriffith
CrossesSmall Stream
Location072242703
RouteCity Street 0
CountyClarke County
StateIowa
Coordinates41.01077, -93.60189
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic67 (2022)
Projected traffic67 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Griffith over Small Stream built?

It was built in 1969, making it 56 years old in 2025.

What condition is Griffith over Small Stream in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Griffith over Small Stream carry?

About 67 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Griffith over Small Stream?

The structure is 34 ft (10.4 m) long with a longest span of 11 ft (3.4 m).

Who owns Griffith over Small Stream?

It is owned by the County Highway Agency.