US Bridges

I-89 Nh 10 NB over Miller Pond Road

Fair

Sullivan County, New Hampshire · 4.6 MI from Springfield T · Structure no. 010001080012800

Built
1959
66 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
30 ft
1 main span
Daily traffic
10,804
2023 count
Owner
State
State Highway Agency

About this bridge

I-89 Nh 10 NB over Miller Pond Road is a concrete culvert carrying I-89 Nh 10 NB over Miller Pond Road in Sullivan County, New Hampshire. It was built in 1959, so it is 66 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 10,804 vehicles a day, roughly 9% of them trucks, projected to reach 15,989 by 2043. The structure is 30 ft (9.1 m) long and 59 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesI-89 Nh 10 NB
CrossesMiller Pond Road
Location4.6 MI from Springfield T
RouteInterstate 89
CountySullivan County
StateNew Hampshire
Coordinates43.53293, -72.13925
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating98.3 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 width59 ft (18 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,804 (2023)
Projected traffic15,989 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 NB over Miller Pond Road built?

It was built in 1959, making it 66 years old in 2025.

What condition is I-89 Nh 10 NB over Miller Pond Road 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 2023.

How much traffic does I-89 Nh 10 NB over Miller Pond Road carry?

About 10,804 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-89 Nh 10 NB 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 59 ft wide.

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

It is owned by the State Highway Agency.