US Bridges

NH127 over Blackwater River

Poor

Merrimack County, New Hampshire · 4.8 MI from Warner Tl · Structure no. 026800990012300

Built
1941
84 years old
Condition
Poor
inspected November 2024
Type
Frame
Concrete Continuous
Length
166 ft
3 main spans
Daily traffic
1,472
2023 count
Owner
State
State Highway Agency

About this bridge

NH127 over Blackwater River is a concrete continuous frame carrying NH127 over Blackwater River in Merrimack County, New Hampshire. It was built in 1941, so it is 84 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,472 vehicles a day, roughly 4% of them trucks, projected to reach 2,178 by 2043. The structure is 166 ft (50.6 m) long and 34 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesNH127
CrossesBlackwater River
Location4.8 MI from Warner Tl
RouteState Highway 127
Coordinates43.31544, -71.71952
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 8 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.7 US tons
Inventory rating16.6 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length166 ft (50.6 m)
Longest span65 ft (19.8 m)
Deck width34 ft (10.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,472 (2023)
Projected traffic2,178 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
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 NH127 over Blackwater River built?

It was built in 1941, making it 84 years old in 2025.

What condition is NH127 over Blackwater River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does NH127 over Blackwater River carry?

About 1,472 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH127 over Blackwater River?

The structure is 166 ft (50.6 m) long with a longest span of 65 ft (19.8 m) and a deck 34 ft wide.

Who owns NH127 over Blackwater River?

It is owned by the State Highway Agency.