US Bridges

Coakley Road over Hodgson Brook

Poor

Rockingham County, New Hampshire · 1 Mi. West of Bypass 1 · Structure no. 021701910011000

Built
1940
85 years old
Condition
Poor
inspected October 2024
Type
Culvert
Concrete
Length
36 ft
3 main spans
Daily traffic
480
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Coakley Road over Hodgson Brook is a concrete culvert carrying Coakley Road over Hodgson Brook in Rockingham County, New Hampshire. It was built in 1940, so it is 85 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 480 vehicles a day, roughly 4% of them trucks, projected to reach 710 by 2043. The structure is 36 ft (11 m) long.

Location

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CarriesCoakley Road
CrossesHodgson Brook
Location1 Mi. West of Bypass 1
CountyRockingham County
StateNew Hampshire
Coordinates43.06949, -70.78057
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 16 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.7 US tons
Inventory rating40.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length36 ft (11 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2023)
Projected traffic710 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 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 Coakley Road over Hodgson Brook built?

It was built in 1940, making it 85 years old in 2025.

What condition is Coakley Road over Hodgson Brook in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2024.

How much traffic does Coakley Road over Hodgson Brook carry?

About 480 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Coakley Road over Hodgson Brook?

The structure is 36 ft (11 m) long with a longest span of 11 ft (3.4 m).

Who owns Coakley Road over Hodgson Brook?

It is owned by the City or Municipal Highway Agency.