US Bridges

Boulder RD over Boulder Creek

Fair

Shasta County, California · 0.2 MI N of Lake Blvd · Structure no. 06C0331

Built
1984
41 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
1,400
2012 count
Owner
City
City or Municipal Highway Agency

About this bridge

Boulder RD over Boulder Creek is a concrete continuous culvert carrying Boulder RD over Boulder Creek in Shasta County, California. It was built in 1984, so it is 41 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 6 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 1,400 vehicles a day, roughly 1% of them trucks, projected to reach 2,152 by 2045. The structure is 33 ft (10.1 m) long and 53 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBoulder RD
CrossesBoulder Creek
Location0.2 MI N of Lake Blvd
RouteCity Street 0
CountyShasta County
StateCalifornia
Coordinates40.61228, -122.37031
Functional classUrban 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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span11 ft (3.4 m)
Deck width53 ft (16.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2012)
Projected traffic2,152 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Boulder RD over Boulder Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Boulder RD 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 May 2023.

How much traffic does Boulder RD over Boulder Creek carry?

About 1,400 vehicles per day (2012 count), of which roughly 1% are trucks.

How long is Boulder RD over Boulder Creek?

The structure is 33 ft (10.1 m) long with a longest span of 11 ft (3.4 m) and a deck 53 ft wide.

Who owns Boulder RD over Boulder Creek?

It is owned by the City or Municipal Highway Agency.