US Bridges

HWY 66 over Crooked Creek

Fair

Ringgold County, Iowa · 069303206 · Structure no. 000000000046511

Built
1985
40 years old
Condition
Fair
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
175 ft
3 main spans
Daily traffic
737
2022 count
Owner
County
County Highway Agency

About this bridge

HWY 66 over Crooked Creek is a prestressed concrete stringer/multi-beam or girder carrying HWY 66 over Crooked Creek in Ringgold County, Iowa. It was built in 1985, so it is 40 years old, younger 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 6 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 737 vehicles a day, roughly 10% of them trucks, projected to reach 737 by 2043. The structure is 175 ft (53.3 m) long and 39 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesHWY 66
CrossesCrooked Creek
Location069303206
RouteCounty Highway 0
CountyRinggold County
StateIowa
Coordinates40.72991, -94.32858
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.7 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length175 ft (53.3 m)
Longest span69 ft (21 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic737 (2022)
Projected traffic737 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 66 over Crooked Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is HWY 66 over Crooked Creek 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 December 2022.

How much traffic does HWY 66 over Crooked Creek carry?

About 737 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is HWY 66 over Crooked Creek?

The structure is 175 ft (53.3 m) long with a longest span of 69 ft (21 m) and a deck 39 ft wide.

Who owns HWY 66 over Crooked Creek?

It is owned by the County Highway Agency.