US Bridges

Burnt Mills Road over Muddy Run

Good

Somerset County, New Jersey · 0.58MI E. of Lamington RD · Structure no. 18D1002

Built
1995
30 years old
Condition
Good
inspected August 2023
Type
Slab
Wood or Timber
Length
28 ft
1 main span
Daily traffic
4,029
2023 count
Owner
County
County Highway Agency

About this bridge

Burnt Mills Road over Muddy Run is a wood or timber slab carrying Burnt Mills Road over Muddy Run in Somerset County, New Jersey. It was built in 1995, so it is 30 years old, younger than the New Jersey average of 58.5 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 4,029 vehicles a day, roughly 3% of them trucks, projected to reach 4,835 by 2043. The structure is 28 ft (8.5 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesBurnt Mills Road
CrossesMuddy Run
Location0.58MI E. of Lamington RD
RouteCounty Highway 620
Coordinates40.63275, -74.6969
Functional classRural Major 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
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 alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length28 ft (8.5 m)
Longest span24 ft (7.3 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,029 (2023)
Projected traffic4,835 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Burnt Mills Road over Muddy Run built?

It was built in 1995, making it 30 years old in 2025.

What condition is Burnt Mills Road over Muddy Run 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 August 2023.

How much traffic does Burnt Mills Road over Muddy Run carry?

About 4,029 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Burnt Mills Road over Muddy Run?

The structure is 28 ft (8.5 m) long with a longest span of 24 ft (7.3 m) and a deck 32 ft wide.

Who owns Burnt Mills Road over Muddy Run?

It is owned by the County Highway Agency.