US Bridges

Stc 1809; N Beach over Rainbow Canal;mud Lake

Fair

Bear Lake County, Idaho · 0.8 N. 4.5 E. ST Charles · Structure no. 000000000019185

Built
1968
57 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
1,200
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 1809; N Beach over Rainbow Canal;mud Lake is a prestressed concrete stringer/multi-beam or girder carrying Stc 1809; N Beach over Rainbow Canal;mud Lake in Bear Lake County, Idaho. It was built in 1968, so it is 57 years old, older than the Idaho average of 45.3 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 1,200 vehicles a day, roughly 6% of them trucks, projected to reach 1,800 by 2042. The structure is 72 ft (21.9 m) long and 31 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

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CarriesStc 1809; N Beach
CrossesRainbow Canal;mud Lake
Location0.8 N. 4.5 E. ST Charles
RouteCounty Highway 1809
CountyBear Lake County
StateIdaho
Coordinates42.12025, -111.29892
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span68 ft (20.7 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2023)
Projected traffic1,800 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 1809; N Beach over Rainbow Canal;mud Lake built?

It was built in 1968, making it 57 years old in 2025.

What condition is Stc 1809; N Beach over Rainbow Canal;mud Lake 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 Stc 1809; N Beach over Rainbow Canal;mud Lake carry?

About 1,200 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Stc 1809; N Beach over Rainbow Canal;mud Lake?

The structure is 72 ft (21.9 m) long with a longest span of 68 ft (20.7 m) and a deck 31 ft wide.

Who owns Stc 1809; N Beach over Rainbow Canal;mud Lake?

It is owned by the County Highway Agency.