US Bridges

HWY 66 over W.Fk Grand River

PoorPosted for load

Ringgold County, Iowa · 069300506 · Structure no. 000000000046520

Built
1935
90 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
214 ft
3 main spans
Daily traffic
737
2022 count
Owner
County
County Highway Agency

About this bridge

HWY 66 over W.Fk Grand River is a steel continuous stringer/multi-beam or girder carrying HWY 66 over W.Fk Grand River in Ringgold County, Iowa. It was built in 1935, so it is 90 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 3 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: posted for load restriction.

It carries about 737 vehicles a day, roughly 10% of them trucks, projected to reach 737 by 2043. The structure is 214 ft (65.2 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesHWY 66
CrossesW.Fk Grand River
Location069300506
RouteCounty Highway 0
StateIowa
Coordinates40.79827, -94.33832
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.3 US tons
Inventory rating19.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length214 ft (65.2 m)
Longest span82 ft (25 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 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 closed5 mi (8 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$2.5 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 66 over W.Fk Grand River built?

It was built in 1935, making it 90 years old in 2025.

What condition is HWY 66 over W.Fk Grand River 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 December 2023.

How much traffic does HWY 66 over W.Fk Grand River carry?

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

How long is HWY 66 over W.Fk Grand River?

The structure is 214 ft (65.2 m) long with a longest span of 82 ft (25 m) and a deck 28 ft wide.

Who owns HWY 66 over W.Fk Grand River?

It is owned by the County Highway Agency.