US Bridges

IRR BIA RTE 11 over Pine Creek

Fair

Humboldt County, California · 16 KM NW of Hoopa · Structure no. 00000000000J120

Built
1977
48 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
125 ft
2 main spans
Daily traffic
10
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 11 over Pine Creek is a prestressed concrete tee beam carrying IRR BIA RTE 11 over Pine Creek in Humboldt County, California. It was built in 1977, so it is 48 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 10 vehicles a day, roughly 20% of them trucks, projected to reach 20 by 2043. The structure is 125 ft (38 m) long and 21 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesIRR BIA RTE 11
CrossesPine Creek
Location16 KM NW of Hoopa
RouteFederal Lands Road 11
CountyHumboldt County
StateCalifornia
Coordinates41.14722, -123.78575
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating35.9 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length125 ft (38 m)
Longest span61 ft (18.6 m)
Deck width21 ft (6.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2023)
Projected traffic20 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$200,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE 11 over Pine Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is IRR BIA RTE 11 over Pine 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 October 2023.

How much traffic does IRR BIA RTE 11 over Pine Creek carry?

About 10 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is IRR BIA RTE 11 over Pine Creek?

The structure is 125 ft (38 m) long with a longest span of 61 ft (18.6 m) and a deck 21 ft wide.

Who owns IRR BIA RTE 11 over Pine Creek?

It is owned by the Bureau of Indian Affairs.