US Bridges

42N16 over Parker Creek

Good

Modoc County, California · Wildlife Refuge Bndry · Structure no. 050953000003003

Built
1969
56 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
36 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

42N16 over Parker Creek is a wood or timber stringer/multi-beam or girder carrying 42N16 over Parker Creek in Modoc County, California. It was built in 1969, so it is 56 years old, older 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 36 ft (11 m) long and 16 ft wide.

Carries42N16
CrossesParker Creek
LocationWildlife Refuge Bndry
RouteFederal Lands Road 42N16
Coordinates41.4253, -120.27874
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation*: *
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating—
Inventory rating—

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 42N16 over Parker Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is 42N16 over Parker 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 August 2023.

How much traffic does 42N16 over Parker Creek carry?

About 50 vehicles per day (latest count).

How long is 42N16 over Parker Creek?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 16 ft wide.

Who owns 42N16 over Parker Creek?

It is owned by the U.S. Forest Service.