US Bridges

County Road over Frog Creek

PoorClosed to traffic

Dallas County, Iowa · 081281608 · Structure no. 000000000132620

Built
1937
88 years old, rebuilt 1961
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
39 ft
2 main spans
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

County Road over Frog Creek is a wood or timber stringer/multi-beam or girder carrying County Road over Frog Creek in Dallas County, Iowa. It was built in 1937 and reconstructed in 1961, so it is 88 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 0 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: closed to all traffic.

It carries about 35 vehicles a day, projected to reach 35 by 2043. The structure is 39 ft (12 m) long and 18 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty Road
CrossesFrog Creek
Location081281608
RouteCounty Highway 0
CountyDallas County
StateIowa
Coordinates41.82475, -94.10718
Functional classUrban 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
Deck0 FailedOut of service and beyond corrective action.
Superstructure0 FailedOut of service and beyond corrective action.
Substructure0 FailedOut of service and beyond corrective action.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length39 ft (12 m)
Longest span19 ft (5.8 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2022)
Projected traffic35 by 2043
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-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 County Road over Frog Creek built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1961.

What condition is County Road over Frog Creek 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 May 2023.

How much traffic does County Road over Frog Creek carry?

About 35 vehicles per day (2022 count).

How long is County Road over Frog Creek?

The structure is 39 ft (12 m) long with a longest span of 19 ft (5.8 m) and a deck 18 ft wide.

Who owns County Road over Frog Creek?

It is owned by the County Highway Agency.