US Bridges

River Road over Dodge Brook

Good

Sullivan County, New Hampshire · .67 Mi. N. Jct. Nh 123-A · Structure no. 000101610008100

Built
1933
92 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
105
2023 count
Owner
State
State Highway Agency

About this bridge

River Road over Dodge Brook is a steel stringer/multi-beam or girder carrying River Road over Dodge Brook in Sullivan County, New Hampshire. It was built in 1933, so it is 92 years old, older than the New Hampshire average of 56.9 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 105 vehicles a day, roughly 10% of them trucks, projected to reach 155 by 2043. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRiver Road
CrossesDodge Brook
Location.67 Mi. N. Jct. Nh 123-A
RouteState Highway 0
CountySullivan County
StateNew Hampshire
Coordinates43.20109, -72.23698
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 protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating28 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span23 ft (7 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic105 (2023)
Projected traffic155 by 2043
Trucks10%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was River Road over Dodge Brook built?

It was built in 1933, making it 92 years old in 2025.

What condition is River Road over Dodge Brook 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 June 2024.

How much traffic does River Road over Dodge Brook carry?

About 105 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is River Road over Dodge Brook?

The structure is 30 ft (9.1 m) long with a longest span of 23 ft (7 m) and a deck 28 ft wide.

Who owns River Road over Dodge Brook?

It is owned by the State Highway Agency.