US Bridges

Local over Trib to Mason Creek

Fair

Guthrie County, Iowa · 079323201 · Structure no. 000000000168360

Built
1940
85 years old, rebuilt 2015
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
68 ft
1 main span
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Trib to Mason Creek is a wood or timber stringer/multi-beam or girder carrying Local over Trib to Mason Creek in Guthrie County, Iowa. It was built in 1940 and reconstructed in 2015, so it is 85 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 6 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 15 vehicles a day, projected to reach 15 by 2043. The structure is 68 ft (20.7 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLocal
CrossesTrib to Mason Creek
Location079323201
RouteCounty Highway 0
CountyGuthrie County
StateIowa
Coordinates41.61637, -94.60706
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.6 US tons
Inventory rating42.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length68 ft (20.7 m)
Longest span22 ft (6.7 m)
Deck width21 ft (6.3 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 by 2043
Trucks0%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Trib to Mason Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2015.

What condition is Local over Trib to Mason 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 November 2023.

How much traffic does Local over Trib to Mason Creek carry?

About 15 vehicles per day (2022 count).

How long is Local over Trib to Mason Creek?

The structure is 68 ft (20.7 m) long with a longest span of 22 ft (6.7 m) and a deck 21 ft wide.

Who owns Local over Trib to Mason Creek?

It is owned by the County Highway Agency.