US Bridges

South Shore Drive over Boulder Creek

Fair

Shasta County, California · 3.5 Miles South of HWY 29 · Structure no. 8750014S0000000

Built
1996
29 years old
Condition
Fair
inspected July 2023
Type
Culvert
Steel
Length
31 ft
1 main span
Daily traffic
—
2007 count
Owner
Federal
National Park Service

About this bridge

South Shore Drive over Boulder Creek is a steel culvert carrying South Shore Drive over Boulder Creek in Shasta County, California. It was built in 1996, so it is 29 years old, younger than the California average of 54.8 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.

No traffic count is recorded. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesSouth Shore Drive
CrossesBoulder Creek
Location3.5 Miles South of HWY 29
RouteFederal Lands Road 0
CountyShasta County
StateCalifornia
Coordinates40.64036, -122.5985
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; extensive scour has occurred
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.7 US tons
Inventory rating17.2 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span31 ft (9.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic100 by 2027
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$165,000
NavigationNo navigation control on waterway

Frequently asked questions

When was South Shore Drive over Boulder Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is South Shore Drive over Boulder 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 July 2023.

How much traffic does South Shore Drive over Boulder Creek carry?

No traffic count is recorded for this structure.

How long is South Shore Drive over Boulder Creek?

The structure is 31 ft (9.4 m) long with a longest span of 31 ft (9.4 m).

Who owns South Shore Drive over Boulder Creek?

It is owned by the National Park Service.