US Bridges

Nipomo ST over Stenner Creek

Fair

San Luis Obispo County, California · West of Peach ST · Structure no. 49C0398

Built
1922
103 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete
Length
45 ft
1 main span
Daily traffic
2,549
2008 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nipomo ST over Stenner Creek is a concrete tee beam carrying Nipomo ST over Stenner Creek in San Luis Obispo County, California. It was built in 1922, so it is 103 years old, older 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 2,549 vehicles a day, roughly 3% of them trucks, projected to reach 2,103 by 2045. The structure is 45 ft (13.7 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNipomo ST
CrossesStenner Creek
LocationWest of Peach ST
RouteCity Street 0
CountySan Luis Obispo County
StateCalifornia
Coordinates35.28043, -120.66822
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27.4 US tons
Inventory rating16.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span43 ft (13.1 m)
Deck width36 ft (11 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,549 (2008)
Projected traffic2,103 by 2045
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 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 Stenner Creek built?

It was built in 1922, making it 103 years old in 2025.

What condition is Nipomo ST over Stenner Creek 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 March 2023.

How much traffic does Nipomo ST over Stenner Creek carry?

About 2,549 vehicles per day (2008 count), of which roughly 3% are trucks.

How long is Nipomo ST over Stenner Creek?

The structure is 45 ft (13.7 m) long with a longest span of 43 ft (13.1 m) and a deck 36 ft wide.

Who owns Nipomo ST over Stenner Creek?

It is owned by the City or Municipal Highway Agency.