US Bridges

Madbury Road over CSX

Fair

Strafford County, New Hampshire · .2 MI JCT RTE 4 · Structure no. 007001000014300

Built
1980
45 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
193 ft
3 main spans
Daily traffic
4,724
2023 count
Owner
State
State Highway Agency

About this bridge

Madbury Road over CSX is a steel stringer/multi-beam or girder carrying Madbury Road over CSX in Strafford County, New Hampshire. It was built in 1980, so it is 45 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 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 4,724 vehicles a day, roughly 4% of them trucks, projected to reach 6,991 by 2043. The structure is 193 ft (58.8 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMadbury Road
CrossesCSX
Location.2 MI JCT RTE 4
RouteState Highway 0
CountyStrafford County
StateNew Hampshire
Coordinates43.15551, -70.93191
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.7 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length193 ft (58.8 m)
Longest span86 ft (26.2 m)
Deck width39 ft (12 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,724 (2023)
Projected traffic6,991 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Madbury Road over CSX built?

It was built in 1980, making it 45 years old in 2025.

What condition is Madbury Road over CSX 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 June 2024.

How much traffic does Madbury Road over CSX carry?

About 4,724 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Madbury Road over CSX?

The structure is 193 ft (58.8 m) long with a longest span of 86 ft (26.2 m) and a deck 39 ft wide.

Who owns Madbury Road over CSX?

It is owned by the State Highway Agency.