US Bridges

Road M99 over Salmon Creek

Fair

Tulare County, California · 11.94 MI SE of M50 · Structure no. 46C0206

Built
1967
58 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
390
2010 count
Owner
County
County Highway Agency

About this bridge

Road M99 over Salmon Creek is a steel stringer/multi-beam or girder carrying Road M99 over Salmon Creek in Tulare County, California. It was built in 1967, so it is 58 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 390 vehicles a day, roughly 1% of them trucks, projected to reach 1,173 by 2042. The structure is 40 ft (12.2 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesRoad M99
CrossesSalmon Creek
Location11.94 MI SE of M50
RouteCounty Highway 0
CountyTulare County
StateCalifornia
Coordinates35.89564, -118.46625
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.4 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic390 (2010)
Projected traffic1,173 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Road M99 over Salmon Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is Road M99 over Salmon 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 July 2024.

How much traffic does Road M99 over Salmon Creek carry?

About 390 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is Road M99 over Salmon Creek?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 23 ft wide.

Who owns Road M99 over Salmon Creek?

It is owned by the County Highway Agency.