US Bridges

Mill Road over Exeter River

Fair

Rockingham County, New Hampshire · .10 MI from Rt 111-A · Structure no. 002900600005400

Built
1967
58 years old, rebuilt 2022
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
31 ft
1 main span
Daily traffic
452
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mill Road over Exeter River is a steel culvert carrying Mill Road over Exeter River in Rockingham County, New Hampshire. It was built in 1967 and reconstructed in 2022, so it is 58 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 6 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 452 vehicles a day, roughly 4% of them trucks, projected to reach 668 by 2043. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMill Road
CrossesExeter River
Location.10 MI from Rt 111-A
CountyRockingham County
StateNew Hampshire
Coordinates42.96975, -71.08519
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating94 US tons
Inventory rating56.3 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span31 ft (9.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic452 (2023)
Projected traffic668 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Mill Road over Exeter River built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2022.

What condition is Mill Road over Exeter River 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 October 2024.

How much traffic does Mill Road over Exeter River carry?

About 452 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Mill Road over Exeter River?

The structure is 31 ft (9.4 m) long with a longest span of 31 ft (9.4 m).

Who owns Mill Road over Exeter River?

It is owned by the City or Municipal Highway Agency.