US Bridges

Dunlap Blvd over Wilson Creek

Good

San Bernardino County, California · 0.15 MI N/W Ave F · Structure no. 54C0439

Built
1950
75 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
39 ft
3 main spans
Daily traffic
1
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dunlap Blvd over Wilson Creek is a concrete culvert carrying Dunlap Blvd over Wilson Creek in San Bernardino County, California. It was built in 1950, so it is 75 years old, older 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1 vehicles a day, roughly 2% of them trucks, projected to reach 1 by 2046. The structure is 39 ft (11.9 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesDunlap Blvd
CrossesWilson Creek
Location0.15 MI N/W Ave F
RouteCity Street 0
Coordinates34.01841, -117.09629
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span12 ft (3.7 m)
Deck width56 ft (17.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1 (2015)
Projected traffic1 by 2046
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Dunlap Blvd over Wilson Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Dunlap Blvd over Wilson 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 Dunlap Blvd over Wilson Creek carry?

About 1 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Dunlap Blvd over Wilson Creek?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m) and a deck 56 ft wide.

Who owns Dunlap Blvd over Wilson Creek?

It is owned by the City or Municipal Highway Agency.