US Bridges

Old River Road over Parsons Creek

Fair

Mendocino County, California · 7.0 MI S/O Talmage RD · Structure no. 10C0093

Built
1948
77 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete Continuous
Length
40 ft
2 main spans
Daily traffic
515
2011 count
Owner
County
County Highway Agency

About this bridge

Old River Road over Parsons Creek is a concrete continuous slab carrying Old River Road over Parsons Creek in Mendocino County, California. It was built in 1948, so it is 77 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 515 vehicles a day, roughly 1% of them trucks, projected to reach 327 by 2042. The structure is 40 ft (12.2 m) long and 28 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

Open in Google Maps
CarriesOld River Road
CrossesParsons Creek
Location7.0 MI S/O Talmage RD
RouteCounty Highway 0
CountyMendocino County
StateCalifornia
Coordinates39.03929, -123.12462
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionFebruary 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating24.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span19 ft (5.8 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic515 (2011)
Projected traffic327 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 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 Old River Road over Parsons Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is Old River Road over Parsons 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 February 2024.

How much traffic does Old River Road over Parsons Creek carry?

About 515 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Old River Road over Parsons Creek?

The structure is 40 ft (12.2 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns Old River Road over Parsons Creek?

It is owned by the County Highway Agency.