US Bridges

S5739;SPIRIT Lake over Spirit Lake(causeway Br)

Fair

Kootenai County, Idaho · 0.4 S. 0.4 W. Spirit Lake · Structure no. 000000000030485

Built
1983
42 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
310
2023 count
Owner
Local
Other Local Agency

About this bridge

S5739;SPIRIT Lake over Spirit Lake(causeway Br) is a prestressed concrete tee beam carrying S5739;SPIRIT Lake over Spirit Lake(causeway Br) in Kootenai County, Idaho. It was built in 1983, so it is 42 years old, younger 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 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 310 vehicles a day, roughly 3% of them trucks, projected to reach 465 by 2042. The structure is 54 ft (16.5 m) long and 37 ft wide.

Location

Open in Google Maps
CarriesS5739;SPIRIT Lake
CrossesSpirit Lake(causeway Br)
Location0.4 S. 0.4 W. Spirit Lake
RouteCounty Highway 5739
CountyKootenai County
StateIdaho
Coordinates47.95856, -116.87419
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.6 US tons
Inventory rating34.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span53 ft (16.2 m)
Deck width37 ft (11.3 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic310 (2023)
Projected traffic465 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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 S5739;SPIRIT Lake over Spirit Lake(causeway Br) built?

It was built in 1983, making it 42 years old in 2025.

What condition is S5739;SPIRIT Lake over Spirit Lake(causeway Br) 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 August 2023.

How much traffic does S5739;SPIRIT Lake over Spirit Lake(causeway Br) carry?

About 310 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S5739;SPIRIT Lake over Spirit Lake(causeway Br)?

The structure is 54 ft (16.5 m) long with a longest span of 53 ft (16.2 m) and a deck 37 ft wide.

Who owns S5739;SPIRIT Lake over Spirit Lake(causeway Br)?

It is owned by the Other Local Agency.