US Bridges

Red Water Brook RD over Red Water Brook

Fair

Sullivan County, New Hampshire · 0.3 MI Nh 120 · Structure no. 004701340016700

Built
1935
90 years old, rebuilt 1985
Condition
Fair
inspected September 2023
Type
Tee Beam
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Red Water Brook RD over Red Water Brook is a prestressed concrete tee beam carrying Red Water Brook RD over Red Water Brook in Sullivan County, New Hampshire. It was built in 1935 and reconstructed in 1985, so it is 90 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 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 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 32 ft (9.8 m) long and 20 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesRed Water Brook RD
CrossesRed Water Brook
Location0.3 MI Nh 120
RouteCity Street 0
Coordinates43.4243, -72.33046
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length32 ft (9.8 m)
Longest span29 ft (8.8 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Red Water Brook RD over Red Water Brook built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1985.

What condition is Red Water Brook RD over Red Water Brook 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 September 2023.

How much traffic does Red Water Brook RD over Red Water Brook carry?

About 96 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Red Water Brook RD over Red Water Brook?

The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 20 ft wide.

Who owns Red Water Brook RD over Red Water Brook?

It is owned by the City or Municipal Highway Agency.