US Bridges

Nat Trails HWY over Lanzit Ditch

Fair

San Bernardino County, California · 2.8 MI E/O Kelbaker RD · Structure no. 54C0781

Built
2017
8 years old
Condition
Fair
inspected October 2024
Type
Girder and Floorbeam System
Wood or Timber
Length
79 ft
4 main spans
Daily traffic
502
2018 count
Owner
County
County Highway Agency

About this bridge

Nat Trails HWY over Lanzit Ditch is a wood or timber girder and floorbeam system carrying Nat Trails HWY over Lanzit Ditch in San Bernardino County, California. It was built in 2017, so it is 8 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 502 vehicles a day, roughly 2% of them trucks, projected to reach 510 by 2042. The structure is 79 ft (24 m) long and 32 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesNat Trails HWY
CrossesLanzit Ditch
Location2.8 MI E/O Kelbaker RD
RouteCounty Highway 0
CountySan Bernardino County
StateCalifornia
Coordinates34.56104, -115.59432
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27.9 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadHL 93
Structure length79 ft (24 m)
Longest span20 ft (6 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic502 (2018)
Projected traffic510 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed24.9 mi (40 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nat Trails HWY over Lanzit Ditch built?

It was built in 2017, making it 8 years old in 2025.

What condition is Nat Trails HWY over Lanzit Ditch 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 2024.

How much traffic does Nat Trails HWY over Lanzit Ditch carry?

About 502 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Nat Trails HWY over Lanzit Ditch?

The structure is 79 ft (24 m) long with a longest span of 20 ft (6 m) and a deck 32 ft wide.

Who owns Nat Trails HWY over Lanzit Ditch?

It is owned by the County Highway Agency.