US Bridges

Glenwood Avenue over Nh 16 SP Tpk

Good

Strafford County, New Hampshire · .7 Mi. from Jct. 16 · Structure no. 006501040014300

Built
1957
68 years old, rebuilt 2002
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
240 ft
4 main spans
Daily traffic
2,660
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Glenwood Avenue over Nh 16 SP Tpk is a steel continuous stringer/multi-beam or girder carrying Glenwood Avenue over Nh 16 SP Tpk in Strafford County, New Hampshire. It was built in 1957 and reconstructed in 2002, so it is 68 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 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 2,660 vehicles a day, roughly 3% of them trucks, projected to reach 3,936 by 2043. The structure is 240 ft (73.2 m) long and 39 ft wide.

Location

Open in Google Maps
CarriesGlenwood Avenue
CrossesNh 16 SP Tpk
Location.7 Mi. from Jct. 16
RouteCity Street 0
CountyStrafford County
StateNew Hampshire
Coordinates43.21265, -70.89241
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.4 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length240 ft (73.2 m)
Longest span63 ft (19.2 m)
Deck width39 ft (12 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,660 (2023)
Projected traffic3,936 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Glenwood Avenue over Nh 16 SP Tpk built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2002.

What condition is Glenwood Avenue over Nh 16 SP Tpk 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 April 2023.

How much traffic does Glenwood Avenue over Nh 16 SP Tpk carry?

About 2,660 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Glenwood Avenue over Nh 16 SP Tpk?

The structure is 240 ft (73.2 m) long with a longest span of 63 ft (19.2 m) and a deck 39 ft wide.

Who owns Glenwood Avenue over Nh 16 SP Tpk?

It is owned by the State Toll Authority.