US Bridges

Mt. Benevolence RD over Swartswood Lake Trib.

Fair

Sussex County, New Jersey · 2.0 M West of CR 521 · Structure no. 1900S30

Built
1940
85 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
1,577
2023 count
Owner
County
County Highway Agency

About this bridge

Mt. Benevolence RD over Swartswood Lake Trib. is a concrete slab carrying Mt. Benevolence RD over Swartswood Lake Trib. in Sussex County, New Jersey. It was built in 1940, so it is 85 years old, older than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 1,577 vehicles a day, roughly 3% of them trucks, projected to reach 1,892 by 2043. The structure is 23 ft (7 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMt. Benevolence RD
CrossesSwartswood Lake Trib.
Location2.0 M West of CR 521
CountySussex County
StateNew Jersey
Coordinates41.10581, -74.84913
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
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 geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating49.1 US tons
Inventory rating29 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width59 ft (18 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,577 (2023)
Projected traffic1,892 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Mt. Benevolence RD over Swartswood Lake Trib. built?

It was built in 1940, making it 85 years old in 2025.

What condition is Mt. Benevolence RD over Swartswood Lake Trib. 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 March 2023.

How much traffic does Mt. Benevolence RD over Swartswood Lake Trib. carry?

About 1,577 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Mt. Benevolence RD over Swartswood Lake Trib.?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 59 ft wide.

Who owns Mt. Benevolence RD over Swartswood Lake Trib.?

It is owned by the County Highway Agency.