US Bridges

Childs Hill Road over Rock Creek

PoorPosted for load

Del Norte County, California · 8.8 MI SE of Hamilton RD · Structure no. 01P0020

Built
1950
75 years old
Condition
Poor
inspected June 2024
Type
Box Beam or Girders - Multiple
Steel
Length
90 ft
1 main span
Daily traffic
10
2003 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Childs Hill Road over Rock Creek is a steel box beam or girders - multiple carrying Childs Hill Road over Rock Creek in Del Norte County, California. It was built in 1950, so it is 75 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, roughly 10% of them trucks, projected to reach 28 by 2044. The structure is 90 ft (27.4 m) long and 18 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesChilds Hill Road
CrossesRock Creek
Location8.8 MI SE of Hamilton RD
RouteState Lands Road 0
Coordinates41.69191, -123.99899
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating25.7 US tons
Inventory rating15.3 US tons

Structure

MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length90 ft (27.4 m)
Longest span80 ft (24.4 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2003)
Projected traffic28 by 2044
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

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$579,000 (2017 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Childs Hill Road over Rock Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Childs Hill Road over Rock Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Childs Hill Road over Rock Creek carry?

About 10 vehicles per day (2003 count), of which roughly 10% are trucks.

How long is Childs Hill Road over Rock Creek?

The structure is 90 ft (27.4 m) long with a longest span of 80 ft (24.4 m) and a deck 18 ft wide.

Who owns Childs Hill Road over Rock Creek?

It is owned by the State Park, Forest, or Reservation Agency.