US Bridges

E66 over Plague Mine Creek

Poor

Tama County, Iowa · 082131603 · Structure no. 000000000049741

Built
1976
49 years old
Condition
Poor
inspected October 2024
Type
Slab
Concrete Continuous
Length
83 ft
3 main spans
Daily traffic
650
2023 count
Owner
County
County Highway Agency

About this bridge

E66 over Plague Mine Creek is a concrete continuous slab carrying E66 over Plague Mine Creek in Tama County, Iowa. It was built in 1976, so it is 49 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 650 vehicles a day, roughly 15% of them trucks, projected to reach 650 by 2044. The structure is 83 ft (25.3 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesE66
CrossesPlague Mine Creek
Location082131603
RouteCounty Highway 0
StateIowa
Coordinates41.91964, -92.36114
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating70.4 US tons
Inventory rating42.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span31 ft (9.4 m)
Deck width39 ft (11.9 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2023)
Projected traffic650 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 E66 over Plague Mine Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is E66 over Plague Mine 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 October 2024.

How much traffic does E66 over Plague Mine Creek carry?

About 650 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is E66 over Plague Mine Creek?

The structure is 83 ft (25.3 m) long with a longest span of 31 ft (9.4 m) and a deck 39 ft wide.

Who owns E66 over Plague Mine Creek?

It is owned by the County Highway Agency.