US Bridges

Dos Rios RD over Eel River & Ncrra (nwp)

Fair

Mendocino County, California · 0.5 MI NW of SR 162 · Structure no. 10C0005

Built
1966
59 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
624 ft
3 main spans
Daily traffic
143
2011 count
Owner
County
County Highway Agency

About this bridge

Dos Rios RD over Eel River & Ncrra (nwp) is a steel continuous stringer/multi-beam or girder carrying Dos Rios RD over Eel River & Ncrra (nwp) in Mendocino County, California. It was built in 1966, so it is 59 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 143 vehicles a day, roughly 5% of them trucks, projected to reach 217 by 2044. The structure is 624 ft (190.2 m) long and 29 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesDos Rios RD
CrossesEel River & Ncrra (nwp)
Location0.5 MI NW of SR 162
RouteCounty Highway 0
Coordinates39.71429, -123.35149
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.9 US tons
Inventory rating21.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+5 approach)
Design loadHS 20 + Mod
Structure length624 ft (190.2 m)
Longest span240 ft (73.2 m)
Deck width29 ft (8.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic143 (2011)
Projected traffic217 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed24.9 mi (40 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 Dos Rios RD over Eel River & Ncrra (nwp) built?

It was built in 1966, making it 59 years old in 2025.

What condition is Dos Rios RD over Eel River & Ncrra (nwp) 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 August 2024.

How much traffic does Dos Rios RD over Eel River & Ncrra (nwp) carry?

About 143 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Dos Rios RD over Eel River & Ncrra (nwp)?

The structure is 624 ft (190.2 m) long with a longest span of 240 ft (73.2 m) and a deck 29 ft wide.

Who owns Dos Rios RD over Eel River & Ncrra (nwp)?

It is owned by the County Highway Agency.