Structure 27501430013200 · Merrimack County, NH

Eagle Pond Road over Eagle Pond Outlet

Carries Eagle Pond Road over Eagle Pond Outlet, 0.15mi Andover Tl.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT38 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

38 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built197452 years old
Length38.1 ft11.6 m
Daily traffic96counted 2023
Last inspectedAugust 2024every 24 months

Location

StateNew Hampshire
CountyMerrimack
Location0.15mi Andover Tl
CarriesEagle Pond Road
CrossesEagle Pond Outlet
Coordinates43.45475, -71.88326

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length38.1 ft (11.6 m)
Max Span29.9 ft (9.1 m)
Deck Width19.4 ft (5.9 m)
Deck Area68.4 sq m
Main Spans1
Year Built1974

Traffic

Avg Daily Traffic96 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical8 — Stable, low risk
Structure Number027501430013200

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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