US Bridges

Railroad Grade RD over Jacot Creek

Fair

Benewah County, Idaho · 4.7 E. St. Maries · Structure no. 000000000037060

Built
1912
113 years old, rebuilt 1991
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
97 ft
6 main spans
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

Railroad Grade RD over Jacot Creek is a wood or timber stringer/multi-beam or girder carrying Railroad Grade RD over Jacot Creek in Benewah County, Idaho. It was built in 1912 and reconstructed in 1991, so it is 113 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 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 40 vehicles a day, roughly 5% of them trucks, projected to reach 60 by 2039. The structure is 97 ft (29.6 m) long and 14 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRailroad Grade RD
CrossesJacot Creek
Location4.7 E. St. Maries
RouteCounty Highway 0
CountyBenewah County
StateIdaho
Coordinates47.33333, -116.49356
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating45 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans6
Design loadHS 20
Structure length97 ft (29.6 m)
Longest span16 ft (4.9 m)
Deck width14 ft (4.2 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic60 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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$860,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Railroad Grade RD over Jacot Creek built?

It was built in 1912, making it 113 years old in 2025. It was reconstructed in 1991.

What condition is Railroad Grade RD over Jacot 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 September 2023.

How much traffic does Railroad Grade RD over Jacot Creek carry?

About 40 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Railroad Grade RD over Jacot Creek?

The structure is 97 ft (29.6 m) long with a longest span of 16 ft (4.9 m) and a deck 14 ft wide.

Who owns Railroad Grade RD over Jacot Creek?

It is owned by the County Highway Agency.