US Bridges

Entrance Road over Morrison Creek

Fair

Kings County, California · Navy Research Center · Structure no. 1CA2002

Built
1965
60 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
82 ft
3 main spans
Daily traffic
150
2013 count
Owner
Federal
Navy / Marines

About this bridge

Entrance Road over Morrison Creek is a concrete continuous slab carrying Entrance Road over Morrison Creek in Kings 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 6 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 2% of them trucks, projected to reach 200 by 2039. The structure is 82 ft (24.9 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesEntrance Road
CrossesMorrison Creek
LocationNavy Research Center
Coordinates38.51086, -121.39906
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length82 ft (24.9 m)
Longest span32 ft (9.8 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2013)
Projected traffic200 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNavy / Marines
Maintained byNavy / Marines
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Entrance Road over Morrison Creek built?

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

What condition is Entrance Road over Morrison 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 Entrance Road over Morrison Creek carry?

About 150 vehicles per day (2013 count), of which roughly 2% are trucks.

How long is Entrance Road over Morrison Creek?

The structure is 82 ft (24.9 m) long with a longest span of 32 ft (9.8 m) and a deck 31 ft wide.

Who owns Entrance Road over Morrison Creek?

It is owned by the Navy / Marines.