US Bridges

NH109 over Pike Brook

Good

Carroll County, New Hampshire · 0.3 MI JCT Rt 16 · Structure no. 003301240007900

Built
1974
51 years old, rebuilt 2013
Condition
Good
inspected June 2024
Type
Culvert
Steel
Length
20 ft
1 main span
Daily traffic
1,862
2023 count
Owner
State
State Highway Agency

About this bridge

NH109 over Pike Brook is a steel culvert carrying NH109 over Pike Brook in Carroll County, New Hampshire. It was built in 1974 and reconstructed in 2013, so it is 51 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,862 vehicles a day, roughly 4% of them trucks, projected to reach 2,755 by 2043. The structure is 20 ft (6.2 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNH109
CrossesPike Brook
Location0.3 MI JCT Rt 16
RouteState Highway 109
CountyCarroll County
StateNew Hampshire
Coordinates43.54896, -71.04666
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.9 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 20
Structure length20 ft (6.2 m)
Longest span20 ft (6.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,862 (2023)
Projected traffic2,755 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 NH109 over Pike Brook built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2013.

What condition is NH109 over Pike Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does NH109 over Pike Brook carry?

About 1,862 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH109 over Pike Brook?

The structure is 20 ft (6.2 m) long with a longest span of 20 ft (6.2 m).

Who owns NH109 over Pike Brook?

It is owned by the State Highway Agency.