US Bridges

Ryan Creek Road over Ryan Creek

Good

Mendocino County, California · 0.25 MI West of HWY 101 · Structure no. 10C0218

Built
2011
14 years old
Condition
Good
inspected August 2021
Type
Arch - Deck
Concrete
Length
20 ft
1 main span
Daily traffic
150
2012 count
Owner
County
County Highway Agency

About this bridge

Ryan Creek Road over Ryan Creek is a concrete arch - deck carrying Ryan Creek Road over Ryan Creek in Mendocino County, California. It was built in 2011, so it is 14 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 150 vehicles a day, roughly 5% of them trucks, projected to reach 216 by 2043. The structure is 20 ft (6.1 m) long.

CarriesRyan Creek Road
CrossesRyan Creek
Location0.25 MI West of HWY 101
RouteCounty Highway 0
Coordinates39.48026, -123.36468
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2012)
Projected traffic216 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ryan Creek Road over Ryan Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Ryan Creek Road over Ryan Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2021.

How much traffic does Ryan Creek Road over Ryan Creek carry?

About 150 vehicles per day (2012 count), of which roughly 5% are trucks.

How long is Ryan Creek Road over Ryan Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m).

Who owns Ryan Creek Road over Ryan Creek?

It is owned by the County Highway Agency.