US Bridges

Flynn Creek RD 135 over Marsh Creek

Good

Mendocino County, California · CR 135 MP8.10 S Comptche · Structure no. 10C0211

Built
2007
18 years old
Condition
Good
inspected May 2023
Type
Arch - Deck
Concrete
Length
24 ft
1 main span
Daily traffic
670
2008 count
Owner
County
County Highway Agency

About this bridge

Flynn Creek RD 135 over Marsh Creek is a concrete arch - deck carrying Flynn Creek RD 135 over Marsh Creek in Mendocino County, California. It was built in 2007, so it is 18 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 670 vehicles a day, roughly 4% of them trucks, projected to reach 858 by 2041. The structure is 24 ft (7.2 m) long. If it were closed, the detour would be 34.8 mi (56 km).

CarriesFlynn Creek RD 135
CrossesMarsh Creek
LocationCR 135 MP8.10 S Comptche
RouteCounty Highway 0
Coordinates39.25198, -123.59075
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 protection9 ExcellentNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length24 ft (7.2 m)
Longest span24 ft (7.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic670 (2008)
Projected traffic858 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Flynn Creek RD 135 over Marsh Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Flynn Creek RD 135 over Marsh 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 May 2023.

How much traffic does Flynn Creek RD 135 over Marsh Creek carry?

About 670 vehicles per day (2008 count), of which roughly 4% are trucks.

How long is Flynn Creek RD 135 over Marsh Creek?

The structure is 24 ft (7.2 m) long with a longest span of 24 ft (7.2 m).

Who owns Flynn Creek RD 135 over Marsh Creek?

It is owned by the County Highway Agency.