US Bridges

Cypress Mt DR over Branch of Las Tablas Crk

Fair

San Luis Obispo County, California · 0.2 MI NW of Klau · Structure no. 49C0017

Built
1950
75 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
57 ft
3 main spans
Daily traffic
25
2021 count
Owner
County
County Highway Agency

About this bridge

Cypress Mt DR over Branch of Las Tablas Crk is a wood or timber stringer/multi-beam or girder carrying Cypress Mt DR over Branch of Las Tablas Crk in San Luis Obispo 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 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 25 vehicles a day, roughly 5% of them trucks, projected to reach 36 by 2044. The structure is 57 ft (17.4 m) long and 20 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCypress Mt DR
CrossesBranch of Las Tablas Crk
Location0.2 MI NW of Klau
RouteCounty Highway 0
CountySan Luis Obispo County
StateCalifornia
Coordinates35.62801, -120.89881
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.6 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length57 ft (17.4 m)
Longest span18 ft (5.5 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2021)
Projected traffic36 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Cypress Mt DR over Branch of Las Tablas Crk built?

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

What condition is Cypress Mt DR over Branch of Las Tablas Crk 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 June 2024.

How much traffic does Cypress Mt DR over Branch of Las Tablas Crk carry?

About 25 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Cypress Mt DR over Branch of Las Tablas Crk?

The structure is 57 ft (17.4 m) long with a longest span of 18 ft (5.5 m) and a deck 20 ft wide.

Who owns Cypress Mt DR over Branch of Las Tablas Crk?

It is owned by the County Highway Agency.