US Bridges

Nipomo ST over San Luis Obispo Creek

Good

San Luis Obispo County, California · 0.1 MI N Higuera ST · Structure no. 49C0369

Built
1994
31 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
60 ft
1 main span
Daily traffic
4,371
2008 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nipomo ST over San Luis Obispo Creek is a concrete box beam or girders - multiple carrying Nipomo ST over San Luis Obispo Creek in San Luis Obispo County, California. It was built in 1994, so it is 31 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 4,371 vehicles a day, roughly 3% of them trucks, projected to reach 10,512 by 2045. The structure is 60 ft (18.3 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNipomo ST
CrossesSan Luis Obispo Creek
Location0.1 MI N Higuera ST
RouteCity Street 0
Coordinates35.27874, -120.66618
Functional classRural Major Collector

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 protection9 ExcellentNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 48 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width62 ft (18.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,371 (2008)
Projected traffic10,512 by 2045
Trucks3%
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 Nipomo ST over San Luis Obispo Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Nipomo ST over San Luis Obispo 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 March 2023.

How much traffic does Nipomo ST over San Luis Obispo Creek carry?

About 4,371 vehicles per day (2008 count), of which roughly 3% are trucks.

How long is Nipomo ST over San Luis Obispo Creek?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 62 ft wide.

Who owns Nipomo ST over San Luis Obispo Creek?

It is owned by the City or Municipal Highway Agency.