US Bridges

Maple Creek Road over Heath Creek

Fair

Humboldt County, California · 3.12 MI S Butler Vly RD · Structure no. 04C0097

Built
1961
64 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
33 ft
1 main span
Daily traffic
17
2011 count
Owner
County
County Highway Agency

About this bridge

Maple Creek Road over Heath Creek is a concrete slab carrying Maple Creek Road over Heath Creek in Humboldt County, California. It was built in 1961, so it is 64 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 17 vehicles a day, projected to reach 26 by 2041. The structure is 33 ft (10.1 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesMaple Creek Road
CrossesHeath Creek
Location3.12 MI S Butler Vly RD
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates40.72981, -123.85566
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.1 US tons
Inventory rating32.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17 (2011)
Projected traffic26 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Maple Creek Road over Heath Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is Maple Creek Road over Heath 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 June 2023.

How much traffic does Maple Creek Road over Heath Creek carry?

About 17 vehicles per day (2011 count).

How long is Maple Creek Road over Heath Creek?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns Maple Creek Road over Heath Creek?

It is owned by the County Highway Agency.