US Bridges

Silver Lake Road over Jack Creek

Good

Klamath County, Oregon · 020.75 MI from Hwy. 97 · Structure no. 18C035067602075

Built
1986
39 years old
Condition
Good
inspected July 2024
Type
Slab
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
360
2020 count
Owner
County
County Highway Agency

About this bridge

Silver Lake Road over Jack Creek is a prestressed concrete slab carrying Silver Lake Road over Jack Creek in Klamath County, Oregon. It was built in 1986, so it is 39 years old, younger than the Oregon average of 49.9 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 360 vehicles a day, roughly 20% of them trucks, projected to reach 405 by 2025. The structure is 37 ft (11.3 m) long and 32 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesSilver Lake Road
CrossesJack Creek
Location020.75 MI from Hwy. 97
RouteCounty Highway 0B316
StateOregon
Coordinates43.00064, -121.54617
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span34 ft (10.4 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic360 (2020)
Projected traffic405 by 2025
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Silver Lake Road over Jack Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is Silver Lake Road over Jack Creek 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 July 2024.

How much traffic does Silver Lake Road over Jack Creek carry?

About 360 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Silver Lake Road over Jack Creek?

The structure is 37 ft (11.3 m) long with a longest span of 34 ft (10.4 m) and a deck 32 ft wide.

Who owns Silver Lake Road over Jack Creek?

It is owned by the County Highway Agency.