US Bridges

North Hamilton Pkw over Pacheco Creek

Good

Marin County, California · At Aberdeen RD · Structure no. 27C0163

Built
2001
24 years old
Condition
Good
inspected July 2021
Type
Slab
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
5,000
2016 count
Owner
County
County Highway Agency

About this bridge

North Hamilton Pkw over Pacheco Creek is a prestressed concrete slab carrying North Hamilton Pkw over Pacheco Creek in Marin County, California. It was built in 2001, so it is 24 years old, younger 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 5,000 vehicles a day, roughly 5% of them trucks, projected to reach 6,328 by 2043. The structure is 53 ft (16.2 m) long and 46 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesNorth Hamilton Pkw
CrossesPacheco Creek
LocationAt Aberdeen RD
RouteCity Street 0
CountyMarin County
StateCalifornia
Coordinates38.06011, -122.52692
Functional classRural Minor Collector

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 protection8 Very GoodNo problems noted.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length53 ft (16.2 m)
Longest span50 ft (15.2 m)
Deck width46 ft (14 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2016)
Projected traffic6,328 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 North Hamilton Pkw over Pacheco Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is North Hamilton Pkw over Pacheco 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 July 2021.

How much traffic does North Hamilton Pkw over Pacheco Creek carry?

About 5,000 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is North Hamilton Pkw over Pacheco Creek?

The structure is 53 ft (16.2 m) long with a longest span of 50 ft (15.2 m) and a deck 46 ft wide.

Who owns North Hamilton Pkw over Pacheco Creek?

It is owned by the County Highway Agency.