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Nearby Bridges in NBI 2021: 3


NH 11 over BLACKWATER RIVER (Route: 11)
Num:800500009300x
Open: no restriction [A]
Built: 1959, Reconstructed: 2013
Historic: Bridge is possibly eligible for the NRHP. [3]

Google Streetview (If Available)

Rough Distance: 0.1 Miles (0.1 Kilometers)

Bridge Type
Main Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 37.8 m = 124.0 ft
Main Spans: 2 at 18.3 m = 60.0 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 13.7 m = 44.9 ft (2 Lanes) and Out-To-Out: 14.8 m = 48.6 ft for a 13.7 m = 44.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Andover [01460]: Merrimack County [013], New Hampshire [33]
Owned by State Highway Agency [01], DOT District: 2
0.7 MI FROM WILMOT T.L.
Condition
Deck: Excellent [9]
Superstructure: Excellent [9]
Substructure: Very Good [8]
Loading
Design: HL93 [A]
Operating: 61.7 metric ton = 67.9 tons (Load and Resistance Factor(LRFR) [3])
Inventory: 47.7 metric ton = 52.5 tons (Load and Resistance Factor(LRFR) [3])
Appraisal
Structural: Equal to present desirable criteria [8]
Deck Geometry: Superior to present desirable criteria [9]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Superior to present desirable criteria [9] and Countermeasures have been installed to mitigate an existing problem with scour. [7]
Inspections
Date: May 2020 [0520] and Frequency: 24
Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 5017 (2019) and Trucks: 7%
Future ADT: 7425 (In 2041 )
CILLEYVILLE ROAD over BLACKWATER RIVER (Route: 0)
Num:800530009200x
Open: no restriction [A]
Built: 1934, Reconstructed: 1996
Historic: Bridge is possibly eligible for the NRHP. [3]

Google Streetview (If Available)

Rough Distance: 0.2 Miles (0.3 Kilometers)

Bridge Type
Main Span(s): Prestressed concrete [5] Slab [01]
Approach Span(s): Other [00]
Deck: Concrete Precast Panels [2] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 11.6 m = 38.1 ft
Main Spans: 1 at 11 m = 36.1 ft
Approach Spans: 0
Skew: 9
Width, Roadway: 9.1 m = 29.9 ft (2 Lanes) and Out-To-Out: 9.8 m = 32.2 ft for a 9.1 m = 29.9 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Andover [01460]: Merrimack County [013], New Hampshire [33]
Owned by City or Municipal Highway Agency [04], DOT District: 2
0.6 MI NH 11
Condition
Deck: Good [7]
Superstructure: Good [7]
Substructure: Satisfactory [6]
Loading
Design: MS 22.5 / HS 25 or greater [9]
Operating: 88.9 metric ton = 97.8 tons (Load Factor(LF) [1])
Inventory: 53.5 metric ton = 58.9 tons (Load Factor(LF) [1])
Appraisal
Structural: Equal to present minimum criteria [6]
Deck Geometry: Equal to present minimum criteria [6]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Superior to present desirable criteria [9] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: October 2020 [1020] and Frequency: 24
Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 223 (2019) and Trucks: 3%
Future ADT: 330 (In 2041 )
NH 11 over PLEASANT STREAM (Route: 11)
Num:800440008800x
Open: no restriction [A]
Built: 1959, Reconstructed: N/A [0000]
Historic: Bridge is possibly eligible for the NRHP. [3]

Google Streetview (If Available)

Rough Distance: 0.4 Miles (0.7 Kilometers)

Bridge Type
Main Span(s): Steel [3] Stringer/Multi-beam or girder [02]
Approach Span(s): Other [00]
Deck: Concrete Cast-in-Place [1] with Wearing Surface: Bituminous [6]
Bridge Dimensions
Length: 31.7 m = 104.0 ft
Main Spans: 2 at 14.9 m = 48.9 ft
Approach Spans: 0
Skew: 0
Width, Roadway: 12.2 m = 40.0 ft (2 Lanes) and Out-To-Out: 13 m = 42.7 ft for a 11.6 m = 38.1 ft approaching roadway.
Vertical Clearance: 99.99 m = 328.1 ft and Navigational Clearance: 0 = N/A
Location
Andover [01460]: Merrimack County [013], New Hampshire [33]
Owned by State Highway Agency [01], DOT District: 2
.3 MI FROM WILMOT T.L.
Condition
Deck: Good [7]
Superstructure: Satisfactory [6]
Substructure: Good [7]
Loading
Design: MS 18 / HS 20 [5]
Operating: 36.6 metric ton = 40.3 tons (Load Factor(LF) [1])
Inventory: 21.9 metric ton = 24.1 tons (Load Factor(LF) [1])
Appraisal
Structural: Somewhat better than minimum adequacy to tolerate being left in place as is [5]
Deck Geometry: Equal to present minimum criteria [6]
Road Alignment: Equal to present desirable criteria [8]
Waterway: Equal to present desirable criteria [8] and Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Inspections
Date: May 2020 [0520] and Frequency: 24
Future Work
Work Needed: Replacement of bridge or other structure because of substandard load carrying capacity or substantial bridge roadway geometry. [31]
Bridge Detour: 0.2 km = 0.1 mi
Traffic
ADT: 4873 (2019) and Trucks: 7%
Future ADT: 7212 (In 2041 )

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S  - Dismantled and/or in storage. L -  Severe loss of historic integrity due to alteration.

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