US Bridges

IRR BIA Route 51 over Black Canyon Creek

Good

San Diego County, California · 3KM N of Sutherland Dam · Structure no. 00000000000J150

Built
1999
26 years old
Condition
Good
inspected November 2024
Type
Truss - Thru
Steel
Length
124 ft
1 main span
Daily traffic
30
2021 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA Route 51 over Black Canyon Creek is a steel truss - thru carrying IRR BIA Route 51 over Black Canyon Creek in San Diego County, California. It was built in 1999, so it is 26 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.

It carries about 30 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2041. The structure is 124 ft (37.8 m) long and 24 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIRR BIA Route 51
CrossesBlack Canyon Creek
Location3KM N of Sutherland Dam
RouteFederal Lands Road 51
Coordinates33.14478, -116.79047
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating39.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length124 ft (37.8 m)
Longest span122 ft (37.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2021)
Projected traffic45 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA Route 51 over Black Canyon Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is IRR BIA Route 51 over Black Canyon Creek 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 November 2024.

How much traffic does IRR BIA Route 51 over Black Canyon Creek carry?

About 30 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is IRR BIA Route 51 over Black Canyon Creek?

The structure is 124 ft (37.8 m) long with a longest span of 122 ft (37.3 m) and a deck 24 ft wide.

Who owns IRR BIA Route 51 over Black Canyon Creek?

It is owned by the Bureau of Indian Affairs.