US Bridges

Lookout-Hackmore R over Pit River

Fair

Modoc County, California · 0.3 MI NW of C.R. 87 · Structure no. 03C0078

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
147 ft
5 main spans
Daily traffic
2,068
2010 count
Owner
County
County Highway Agency

About this bridge

Lookout-Hackmore R over Pit River is a concrete continuous slab carrying Lookout-Hackmore R over Pit River in Modoc County, California. It was built in 1975, so it is 50 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 2,068 vehicles a day, roughly 9% of them trucks, projected to reach 2,237 by 2041. The structure is 147 ft (44.7 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLookout-Hackmore R
CrossesPit River
Location0.3 MI NW of C.R. 87
RouteCounty Highway 0
CountyModoc County
StateCalifornia
Coordinates41.20964, -121.14607
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating43.5 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length147 ft (44.7 m)
Longest span32 ft (9.8 m)
Deck width32 ft (9.9 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,068 (2010)
Projected traffic2,237 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-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 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 Lookout-Hackmore R over Pit River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Lookout-Hackmore R over Pit River 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 April 2023.

How much traffic does Lookout-Hackmore R over Pit River carry?

About 2,068 vehicles per day (2010 count), of which roughly 9% are trucks.

How long is Lookout-Hackmore R over Pit River?

The structure is 147 ft (44.7 m) long with a longest span of 32 ft (9.8 m) and a deck 32 ft wide.

Who owns Lookout-Hackmore R over Pit River?

It is owned by the County Highway Agency.