US Bridges

State Route 99 over Elder Creek

Good

Sacramento County, California · 03-SAC-099-18.05-SAC · Structure no. 24 0149

Built
1959
66 years old, rebuilt 1991
Condition
Good
inspected February 2024
Type
Slab
Concrete Continuous
Length
72 ft
4 main spans
Daily traffic
161,000
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 99 over Elder Creek is a concrete continuous slab carrying State Route 99 over Elder Creek in Sacramento County, California. It was built in 1959 and reconstructed in 1991, so it is 66 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 161,000 vehicles a day, roughly 6% of them trucks, projected to reach 243,609 by 2042. The structure is 72 ft (22 m) long and 116 ft wide.

CarriesState Route 99
CrossesElder Creek
Location03-SAC-099-18.05-SAC
RouteState Highway 99
Coordinates38.47879, -121.42736
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.9 US tons
Inventory rating34.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length72 ft (22 m)
Longest span17 ft (5.3 m)
Deck width116 ft (35.5 m)
Roadway width110 ft (33.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic161,000 (2019)
Projected traffic243,609 by 2042
Trucks6%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 99 over Elder Creek built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1991.

What condition is State Route 99 over Elder 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 February 2024.

How much traffic does State Route 99 over Elder Creek carry?

About 161,000 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is State Route 99 over Elder Creek?

The structure is 72 ft (22 m) long with a longest span of 17 ft (5.3 m) and a deck 116 ft wide.

Who owns State Route 99 over Elder Creek?

It is owned by the State Highway Agency.