US Bridges

Nh 16 over Nineteen Mile Brook

Fair

Coos County, New Hampshire · 1.4MI Pinkhams Grant Tl · Structure no. 010250960013600

Built
1954
71 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
35 ft
1 main span
Daily traffic
3,350
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 16 over Nineteen Mile Brook is a concrete culvert carrying Nh 16 over Nineteen Mile Brook in Coos County, New Hampshire. It was built in 1954, so it is 71 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 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 3,350 vehicles a day, roughly 7% of them trucks, projected to reach 4,958 by 2043. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 44.1 mi (71 km).

Location

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CarriesNh 16
CrossesNineteen Mile Brook
Location1.4MI Pinkhams Grant Tl
RouteState Highway 16
CountyCoos County
StateNew Hampshire
Coordinates44.30202, -71.22118
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating67.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length35 ft (10.7 m)
Longest span35 ft (10.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,350 (2023)
Projected traffic4,958 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.1 mi (71 km)
TollOn a free road
National Highway SystemYes

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 Nh 16 over Nineteen Mile Brook built?

It was built in 1954, making it 71 years old in 2025.

What condition is Nh 16 over Nineteen Mile 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 July 2023.

How much traffic does Nh 16 over Nineteen Mile Brook carry?

About 3,350 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 16 over Nineteen Mile Brook?

The structure is 35 ft (10.7 m) long with a longest span of 35 ft (10.7 m).

Who owns Nh 16 over Nineteen Mile Brook?

It is owned by the State Highway Agency.