US Bridges

I-89 Nh 10 SB over Miller Pond Road

Good

Sullivan County, New Hampshire · 4.61 MI Springfield T.L. · Structure no. 010001070012800

Built
1972
53 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
30 ft
1 main span
Daily traffic
10,987
2023 count
Owner
State
State Highway Agency

About this bridge

I-89 Nh 10 SB over Miller Pond Road is a concrete culvert carrying I-89 Nh 10 SB over Miller Pond Road in Sullivan County, New Hampshire. It was built in 1972, so it is 53 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 10,987 vehicles a day, roughly 9% of them trucks, projected to reach 16,260 by 2043. The structure is 30 ft (9.1 m) long and 82 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-89 Nh 10 SB
CrossesMiller Pond Road
Location4.61 MI Springfield T.L.
RouteInterstate 89
Coordinates43.53297, -72.13973
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Culvert7 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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width82 ft (25 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,987 (2023)
Projected traffic16,260 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-89 Nh 10 SB over Miller Pond Road built?

It was built in 1972, making it 53 years old in 2025.

What condition is I-89 Nh 10 SB over Miller Pond Road 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 I-89 Nh 10 SB over Miller Pond Road carry?

About 10,987 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-89 Nh 10 SB over Miller Pond Road?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 82 ft wide.

Who owns I-89 Nh 10 SB over Miller Pond Road?

It is owned by the State Highway Agency.