US Bridges

Local RD over Cota Creek

Fair

Allamakee County, Iowa · 097031303 · Structure no. 000000000061721

Built
1991
34 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
49
2022 count
Owner
County
County Highway Agency

About this bridge

Local RD over Cota Creek is a prestressed concrete tee beam carrying Local RD over Cota Creek in Allamakee County, Iowa. It was built in 1991, so it is 34 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 5 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 49 vehicles a day, projected to reach 49 by 2044. The structure is 35 ft (10.7 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLocal RD
CrossesCota Creek
Location097031303
RouteCounty Highway 0
CountyAllamakee County
StateIowa
Coordinates43.21401, -91.14792
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating30.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span33 ft (10.1 m)
Deck width25 ft (7.6 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49 (2022)
Projected traffic49 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Local RD over Cota Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Local RD over Cota 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 April 2024.

How much traffic does Local RD over Cota Creek carry?

About 49 vehicles per day (2022 count).

How long is Local RD over Cota Creek?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.1 m) and a deck 25 ft wide.

Who owns Local RD over Cota Creek?

It is owned by the County Highway Agency.