US Bridges

Upper Mad River RD over Mad River

Fair

Grafton County, New Hampshire · 150 Ft FR Nh RTE 49 · Structure no. 025402220018000

Built
1978
47 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
105 ft
1 main span
Daily traffic
441
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Upper Mad River RD over Mad River is a steel stringer/multi-beam or girder carrying Upper Mad River RD over Mad River in Grafton County, New Hampshire. It was built in 1978, so it is 47 years old, younger 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 6 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 441 vehicles a day, roughly 4% of them trucks, projected to reach 652 by 2043. The structure is 105 ft (32 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesUpper Mad River RD
CrossesMad River
Location150 Ft FR Nh RTE 49
Coordinates43.89788, -71.5721
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.7 US tons
Inventory rating32.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length105 ft (32 m)
Longest span100 ft (30.5 m)
Deck width31 ft (9.3 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic441 (2023)
Projected traffic652 by 2043
Trucks4%
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

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 Upper Mad River RD over Mad River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Upper Mad River RD over Mad River 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 July 2024.

How much traffic does Upper Mad River RD over Mad River carry?

About 441 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Upper Mad River RD over Mad River?

The structure is 105 ft (32 m) long with a longest span of 100 ft (30.5 m) and a deck 31 ft wide.

Who owns Upper Mad River RD over Mad River?

It is owned by the City or Municipal Highway Agency.