US Bridges

Park Rd(sw) over Frog Creek

Poor

Dallas County, Iowa · 081260900 · Structure no. 000000000009430

Built
1930
95 years old
Condition
Poor
inspected March 2023
Type
Arch - Deck
Concrete
Length
23 ft
1 main span
Daily traffic
95
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Park Rd(sw) over Frog Creek is a concrete arch - deck carrying Park Rd(sw) over Frog Creek in Dallas County, Iowa. It was built in 1930, so it is 95 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 95 vehicles a day, projected to reach 95 by 2043. The structure is 23 ft (7 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesPark Rd(sw)
CrossesFrog Creek
Location081260900
RouteCity Street 0
CountyDallas County
StateIowa
Coordinates41.83488, -94.11073
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating30 US tons
Inventory rating22 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95 (2021)
Projected traffic95 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Park Rd(sw) over Frog Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Park Rd(sw) 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 March 2023.

How much traffic does Park Rd(sw) over Frog Creek carry?

About 95 vehicles per day (2021 count).

How long is Park Rd(sw) over Frog Creek?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 22 ft wide.

Who owns Park Rd(sw) over Frog Creek?

It is owned by the City or Municipal Highway Agency.