US Bridges

Mill Pond Road over College Brook

Good

Strafford County, New Hampshire · .2 MI West NH108 JCT · Structure no. 007001070011000

Built
1998
27 years old
Condition
Good
inspected September 2023
Type
Arch - Deck
Concrete
Length
23 ft
1 main span
Daily traffic
1,687
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mill Pond Road over College Brook is a concrete arch - deck carrying Mill Pond Road over College Brook in Strafford County, New Hampshire. It was built in 1998, so it is 27 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,687 vehicles a day, roughly 5% of them trucks, projected to reach 2,496 by 2043. The structure is 23 ft (7 m) long and 39 ft wide.

CarriesMill Pond Road
CrossesCollege Brook
Location.2 MI West NH108 JCT
RouteCity Street 0
Coordinates43.12995, -70.92334
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.5 US tons
Inventory rating33.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length23 ft (7 m)
Longest span22 ft (6.6 m)
Deck width39 ft (12 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,687 (2023)
Projected traffic2,496 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Pond Road over College Brook built?

It was built in 1998, making it 27 years old in 2025.

What condition is Mill Pond Road over College 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 September 2023.

How much traffic does Mill Pond Road over College Brook carry?

About 1,687 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Mill Pond Road over College Brook?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.6 m) and a deck 39 ft wide.

Who owns Mill Pond Road over College Brook?

It is owned by the City or Municipal Highway Agency.