US Bridges

Montgomery DR over Santa Rosa Creek Rsevr

Fair

Sonoma County, California · 0.1 M N Montgomery DR · Structure no. 20C0178

Built
1950
75 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
91 ft
3 main spans
Daily traffic
4,000
2010 count
Owner
City
City or Municipal Highway Agency

About this bridge

Montgomery DR over Santa Rosa Creek Rsevr is a concrete continuous slab carrying Montgomery DR over Santa Rosa Creek Rsevr in Sonoma 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 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 4,000 vehicles a day, roughly 2% of them trucks, projected to reach 8,586 by 2042. The structure is 91 ft (27.7 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMontgomery DR
CrossesSanta Rosa Creek Rsevr
Location0.1 M N Montgomery DR
RouteCity Street 0
CountySonoma County
StateCalifornia
Coordinates38.45798, -122.64911
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.9 US tons
Inventory rating23.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length91 ft (27.7 m)
Longest span30 ft (9.1 m)
Deck width34 ft (10.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2010)
Projected traffic8,586 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Montgomery DR over Santa Rosa Creek Rsevr built?

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

What condition is Montgomery DR over Santa Rosa Creek Rsevr 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 2024.

How much traffic does Montgomery DR over Santa Rosa Creek Rsevr carry?

About 4,000 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is Montgomery DR over Santa Rosa Creek Rsevr?

The structure is 91 ft (27.7 m) long with a longest span of 30 ft (9.1 m) and a deck 34 ft wide.

Who owns Montgomery DR over Santa Rosa Creek Rsevr?

It is owned by the City or Municipal Highway Agency.