US Bridges

Gunpowder Pt DR over Sweetwater Marsh

Poor

San Diego County, California · 0.64 MI W of Interstate 5 · Structure no. 000081682-01671

Built
1984
41 years old
Condition
Poor
inspected October 2024
Type
Other
Steel
Length
44 ft
1 main span
Daily traffic
250
2024 count
Owner
Federal
Bureau of Fish and Wildlife

About this bridge

Gunpowder Pt DR over Sweetwater Marsh is a steel other carrying Gunpowder Pt DR over Sweetwater Marsh in San Diego County, California. It was built in 1984, so it is 41 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 250 vehicles a day, projected to reach 275 by 2044. The structure is 44 ft (13.4 m) long and 18 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesGunpowder Pt DR
CrossesSweetwater Marsh
Location0.64 MI W of Interstate 5
RouteCounty Highway 0
CountySan Diego County
StateCalifornia
Coordinates32.6395, -117.10783
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeOther
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length44 ft (13.4 m)
Longest span44 ft (13.4 m)
Deck width18 ft (5.4 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deck107 ft (32.7 m)

Traffic and service

Average daily traffic250 (2024)
Projected traffic275 by 2044
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Fish and Wildlife
Maintained byBureau of Fish and Wildlife
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$897,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Gunpowder Pt DR over Sweetwater Marsh built?

It was built in 1984, making it 41 years old in 2025.

What condition is Gunpowder Pt DR over Sweetwater Marsh in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Gunpowder Pt DR over Sweetwater Marsh carry?

About 250 vehicles per day (2024 count).

How long is Gunpowder Pt DR over Sweetwater Marsh?

The structure is 44 ft (13.4 m) long with a longest span of 44 ft (13.4 m) and a deck 18 ft wide.

Who owns Gunpowder Pt DR over Sweetwater Marsh?

It is owned by the Bureau of Fish and Wildlife.