US Bridges

Tomki RD over Rocky Creek

Fair

Mendocino County, California · 0.46 MI N CR 237 · Structure no. 10C0161

Built
1933
92 years old, rebuilt 1971
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
512
2011 count
Owner
County
County Highway Agency

About this bridge

Tomki RD over Rocky Creek is a concrete slab carrying Tomki RD over Rocky Creek in Mendocino County, California. It was built in 1933 and reconstructed in 1971, so it is 92 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 512 vehicles a day, roughly 5% of them trucks, projected to reach 691 by 2041. The structure is 30 ft (9.1 m) long and 23 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesTomki RD
CrossesRocky Creek
Location0.46 MI N CR 237
RouteCounty Highway 0
CountyMendocino County
StateCalifornia
Coordinates39.31813, -123.22387
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span20 ft (6.1 m)
Deck width23 ft (7.1 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic512 (2011)
Projected traffic691 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 Tomki RD over Rocky Creek built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1971.

What condition is Tomki RD over Rocky 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 August 2023.

How much traffic does Tomki RD over Rocky Creek carry?

About 512 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Tomki RD over Rocky Creek?

The structure is 30 ft (9.1 m) long with a longest span of 20 ft (6.1 m) and a deck 23 ft wide.

Who owns Tomki RD over Rocky Creek?

It is owned by the County Highway Agency.