US Bridges

State Route 299 over Lemm Creek

Fair

Shasta County, California · 02-SHA-299-32.25 · Structure no. 06 0211

Built
2015
10 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
94 ft
1 main span
Daily traffic
4,750
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 299 over Lemm Creek is a prestressed concrete box beam or girders - multiple carrying State Route 299 over Lemm Creek in Shasta County, California. It was built in 2015, so it is 10 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.

It carries about 4,750 vehicles a day, roughly 4% of them trucks, projected to reach 5,509 by 2042. The structure is 94 ft (28.7 m) long and 47 ft wide. If it were closed, the detour would be 37.3 mi (60 km).

Location

Open in Google Maps
CarriesState Route 299
CrossesLemm Creek
Location02-SHA-299-32.25
RouteState Highway 299
CountyShasta County
StateCalifornia
Coordinates40.64282, -122.22862
Functional classRural Principal Arterial - Other

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101.7 US tons
Inventory rating71.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length94 ft (28.7 m)
Longest span88 ft (26.9 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,750 (2020)
Projected traffic5,509 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 299 over Lemm Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is State Route 299 over Lemm 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 April 2023.

How much traffic does State Route 299 over Lemm Creek carry?

About 4,750 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is State Route 299 over Lemm Creek?

The structure is 94 ft (28.7 m) long with a longest span of 88 ft (26.9 m) and a deck 47 ft wide.

Who owns State Route 299 over Lemm Creek?

It is owned by the State Highway Agency.