US Bridges

NH113 over Charles Brook

Fair

Carroll County, New Hampshire · 2.0 MI S of Maine Sl · Structure no. 004300830012000

Built
1938
87 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
232
2023 count
Owner
State
State Highway Agency

About this bridge

NH113 over Charles Brook is a steel stringer/multi-beam or girder carrying NH113 over Charles Brook in Carroll County, New Hampshire. It was built in 1938, so it is 87 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 232 vehicles a day, roughly 4% of them trucks, projected to reach 343 by 2043. The structure is 31 ft (9.4 m) long and 24 ft wide. If it were closed, the detour would be 52.2 mi (84 km).

Location

Open in Google Maps
CarriesNH113
CrossesCharles Brook
Location2.0 MI S of Maine Sl
RouteState Highway 113
CountyCarroll County
StateNew Hampshire
Coordinates44.23946, -71.01647
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length31 ft (9.4 m)
Longest span27 ft (8.2 m)
Deck width24 ft (7.4 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic232 (2023)
Projected traffic343 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed52.2 mi (84 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 NH113 over Charles Brook built?

It was built in 1938, making it 87 years old in 2025.

What condition is NH113 over Charles 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 2024.

How much traffic does NH113 over Charles Brook carry?

About 232 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH113 over Charles Brook?

The structure is 31 ft (9.4 m) long with a longest span of 27 ft (8.2 m) and a deck 24 ft wide.

Who owns NH113 over Charles Brook?

It is owned by the State Highway Agency.