US Bridges

Old Addie Road over Moyie River (addie Br)

Good

Boundary County, Idaho · 0.1 N. 0.7 E. Addie · Structure no. 000000000030336

Built
1991
34 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
122 ft
1 main span
Daily traffic
90
2023 count
Owner
County
County Highway Agency

About this bridge

Old Addie Road over Moyie River (addie Br) is a prestressed concrete stringer/multi-beam or girder carrying Old Addie Road over Moyie River (addie Br) in Boundary County, Idaho. It was built in 1991, so it is 34 years old, younger than the Idaho average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 90 vehicles a day, roughly 11% of them trucks, projected to reach 135 by 2039. The structure is 122 ft (37.2 m) long and 18 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesOld Addie Road
CrossesMoyie River (addie Br)
Location0.1 N. 0.7 E. Addie
RouteCounty Highway 0
CountyBoundary County
StateIdaho
Coordinates48.95056, -116.16525
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span121 ft (36.9 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2023)
Projected traffic135 by 2039
Trucks11%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2019 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Old Addie Road over Moyie River (addie Br) built?

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

What condition is Old Addie Road over Moyie River (addie Br) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Old Addie Road over Moyie River (addie Br) carry?

About 90 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Old Addie Road over Moyie River (addie Br)?

The structure is 122 ft (37.2 m) long with a longest span of 121 ft (36.9 m) and a deck 18 ft wide.

Who owns Old Addie Road over Moyie River (addie Br)?

It is owned by the County Highway Agency.