US Bridges

Fort Irwin RD over Storm Drainage

GoodPosted for load

San Bernardino County, California · 1 Mile NE BR005 · Structure no. DAPFORNTC000006

Built
1986
39 years old
Condition
Good
inspected April 2024
Type
Slab
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
6,760
2008 count
Owner
Federal
Army

About this bridge

Fort Irwin RD over Storm Drainage is a prestressed concrete slab carrying Fort Irwin RD over Storm Drainage in San Bernardino County, California. It was built in 1986, so it is 39 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 6,760 vehicles a day, roughly 12% of them trucks, projected to reach 10,243 by 2046. The structure is 53 ft (16.2 m) long and 42 ft wide.

CarriesFort Irwin RD
CrossesStorm Drainage
Location1 Mile NE BR005
Coordinates35.19616, -116.7529
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating32.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span50 ft (15.2 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,760 (2008)
Projected traffic10,243 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerArmy
Maintained byArmy
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Fort Irwin RD over Storm Drainage built?

It was built in 1986, making it 39 years old in 2025.

What condition is Fort Irwin RD over Storm Drainage in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does Fort Irwin RD over Storm Drainage carry?

About 6,760 vehicles per day (2008 count), of which roughly 12% are trucks.

How long is Fort Irwin RD over Storm Drainage?

The structure is 53 ft (16.2 m) long with a longest span of 50 ft (15.2 m) and a deck 42 ft wide.

Who owns Fort Irwin RD over Storm Drainage?

It is owned by the Army.