US Bridges

FM over Clear Creek

Poor

Allamakee County, Iowa · 100053503 · Structure no. 000000000063240

Built
1962
63 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
200
2021 count
Owner
County
County Highway Agency

About this bridge

FM over Clear Creek is a prestressed concrete stringer/multi-beam or girder carrying FM over Clear Creek in Allamakee County, Iowa. It was built in 1962, so it is 63 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 200 vehicles a day, roughly 20% of them trucks, projected to reach 200 by 2044. The structure is 51 ft (15.5 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFM
CrossesClear Creek
Location100053503
RouteCounty Highway 0
StateIowa
Coordinates43.43884, -91.41159
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
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 inspectionApril 2024
Inspection intervalevery 12 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating37.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length51 ft (15.5 m)
Longest span49 ft (14.9 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2021)
Projected traffic200 by 2044
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Clear Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is FM over Clear 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 April 2024.

How much traffic does FM over Clear Creek carry?

About 200 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is FM over Clear Creek?

The structure is 51 ft (15.5 m) long with a longest span of 49 ft (14.9 m) and a deck 30 ft wide.

Who owns FM over Clear Creek?

It is owned by the County Highway Agency.