US Bridges

Local over Br Patterson Creek

FairPosted for load

Allamakee County, Iowa · 099063208 · Structure no. 000000000063020

Built
1915
110 years old, rebuilt 1956
Condition
Fair
inspected April 2024
Type
Truss - Thru
Steel
Length
113 ft
1 main span
Daily traffic
29
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Br Patterson Creek is a steel truss - thru carrying Local over Br Patterson Creek in Allamakee County, Iowa. It was built in 1915 and reconstructed in 1956, so it is 110 years old, older 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. Its operating status is: posted for other load-capacity restriction.

It carries about 29 vehicles a day, projected to reach 29 by 2044. The structure is 113 ft (34.4 m) long and 21 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLocal
CrossesBr Patterson Creek
Location099063208
RouteCounty Highway 0
CountyAllamakee County
StateIowa
Coordinates43.35053, -91.5756
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.5 US tons
Inventory rating33.4 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length113 ft (34.4 m)
Longest span110 ft (33.5 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck11 ft (3.4 m)

Traffic and service

Average daily traffic29 (2022)
Projected traffic29 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Br Patterson Creek built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 1956.

What condition is Local over Br Patterson 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 over Br Patterson Creek carry?

About 29 vehicles per day (2022 count).

How long is Local over Br Patterson Creek?

The structure is 113 ft (34.4 m) long with a longest span of 110 ft (33.5 m) and a deck 21 ft wide.

Who owns Local over Br Patterson Creek?

It is owned by the County Highway Agency.