US Bridges

Cappell RD over Mareep Creek

Fair

Humboldt County, California · 5.27 MI S JCT RTE 169 · Structure no. 04C0224

Built
1965
60 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
53 ft
1 main span
Daily traffic
150
2011 count
Owner
County
County Highway Agency

About this bridge

Cappell RD over Mareep Creek is a steel stringer/multi-beam or girder carrying Cappell RD over Mareep Creek in Humboldt County, California. It was built in 1965, so it is 60 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 150 vehicles a day, roughly 10% of them trucks, projected to reach 163 by 2041. The structure is 53 ft (16.2 m) long and 21 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesCappell RD
CrossesMareep Creek
Location5.27 MI S JCT RTE 169
RouteCounty Highway 0
CountyHumboldt County
StateCalifornia
Coordinates41.27837, -123.78792
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 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 alignment7: Better than present minimum criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length53 ft (16.2 m)
Longest span49 ft (14.9 m)
Deck width21 ft (6.5 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2011)
Projected traffic163 by 2041
Trucks10%
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 Cappell RD over Mareep Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Cappell RD over Mareep 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 October 2023.

How much traffic does Cappell RD over Mareep Creek carry?

About 150 vehicles per day (2011 count), of which roughly 10% are trucks.

How long is Cappell RD over Mareep Creek?

The structure is 53 ft (16.2 m) long with a longest span of 49 ft (14.9 m) and a deck 21 ft wide.

Who owns Cappell RD over Mareep Creek?

It is owned by the County Highway Agency.