US Bridges

Nh 16A over E Br Saco River

Poor

Carroll County, New Hampshire · 1.9 MI Conway Tl · Structure no. 001702440013800

Built
1928
97 years old, rebuilt 1990
Condition
Poor
inspected November 2024
Type
Girder and Floorbeam System
Steel
Length
80 ft
1 main span
Daily traffic
1,078
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 16A over E Br Saco River is a steel girder and floorbeam system carrying Nh 16A over E Br Saco River in Carroll County, New Hampshire. It was built in 1928 and reconstructed in 1990, so it is 97 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 1,078 vehicles a day, roughly 10% of them trucks, projected to reach 1,595 by 2043. The structure is 80 ft (24.4 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesNh 16A
CrossesE Br Saco River
Location1.9 MI Conway Tl
RouteState Highway 16A
Coordinates44.10066, -71.14939
Functional classUrban Collector

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 8 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
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.8 US tons
Inventory rating15.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length80 ft (24.4 m)
Longest span72 ft (21.9 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,078 (2023)
Projected traffic1,595 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nh 16A over E Br Saco River built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1990.

What condition is Nh 16A over E Br Saco River 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 November 2024.

How much traffic does Nh 16A over E Br Saco River carry?

About 1,078 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Nh 16A over E Br Saco River?

The structure is 80 ft (24.4 m) long with a longest span of 72 ft (21.9 m) and a deck 27 ft wide.

Who owns Nh 16A over E Br Saco River?

It is owned by the State Highway Agency.