US Bridges

NH103 over Andrew Brook

Fair

Merrimack County, New Hampshire · 2.1 MI from Bradford T.L. · Structure no. 018001320007400

Built
1962
63 years old
Condition
Fair
inspected April 2024
Type
Frame
Concrete
Length
39 ft
1 main span
Daily traffic
5,102
2023 count
Owner
State
State Highway Agency

About this bridge

NH103 over Andrew Brook is a concrete frame carrying NH103 over Andrew Brook in Merrimack County, New Hampshire. It was built in 1962, so it is 63 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 5,102 vehicles a day, roughly 4% of them trucks, projected to reach 7,550 by 2043. The structure is 39 ft (11.9 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNH103
CrossesAndrew Brook
Location2.1 MI from Bradford T.L.
RouteState Highway 103
CountyMerrimack County
StateNew Hampshire
Coordinates43.29656, -71.99592
Functional classRural Major Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating62.5 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length39 ft (11.9 m)
Longest span34 ft (10.4 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,102 (2023)
Projected traffic7,550 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 NH103 over Andrew Brook built?

It was built in 1962, making it 63 years old in 2025.

What condition is NH103 over Andrew 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 April 2024.

How much traffic does NH103 over Andrew Brook carry?

About 5,102 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH103 over Andrew Brook?

The structure is 39 ft (11.9 m) long with a longest span of 34 ft (10.4 m) and a deck 47 ft wide.

Who owns NH103 over Andrew Brook?

It is owned by the State Highway Agency.