2023 HRWAT 3Inspection Report.pdf

Trail #-MP:

1 1

Material:

4 x 16'' x 5.625'' x 34'

Material:

x x x

Material:

Material:

3'' x 8'' x 144'' x

Plan Number:

34' 144'' Service Under Bridge:

22.5' 144'' Vertical Under Bridge Opening (ft):

33' 60'' Top of Deck Height (ft):

0 N Vertical Clear Height (ft):

Rail Ht:

(in)

TIMBER, SAWN TREATED

TIMBER RUNNING PLANKS - UNTREATED

None

Wearing Surface:

DECK GIRDER

Overall Length (ft):

STEEL

TIMBER, SAWN UNTREATED

TIMBER, TREATED

INSPECTION

Forest/Special Use Unit:

Main Span Type:

CategoryBRIDGE IDENTIFICATION AND LOCATION

Trail Bridge Name: HRWAT #3 Trail Number-Bridge MP:

COMPLEX

31393-0.40

SNOW CAT

Androscoggin RD

STRUCTURE TYPE AND MATERIAL

Number of Main Spans:

SPREAD FOOTING

Location: 31393 Huntington Ravine Feature Crossed:

Quantity and Dimensions (Q x D” x W” x L'):

Deck Type: PLANK

Trail Class: 3 Designed Use:

White Mountain NF District:

Superstructure Number of Approach Spans:

Quantity and Dimensions (Q x D” x W” x L'):

Latitude: 44.267994 Longitude: -71.277622

TRACS

TRAIL BRIDGE

Curb Material:

Geometry / Design / Rating

Curb (Ht" x W"):

Rail Material:

Bridge Skew (°):

Dimensions (D”xW”xL”):

Approach Span Type: DECK GIRDER

Substructure Type:

User Barrier Rail Type:

Max Rail Opening:

(in)

WATERWAY

Maximum Span (ft):

Clear Span (ft):

Overall Deck Width (in):

Horizontal Clear Width (in):

Tread Width (in):

Structure Remarks

Superstructure: There are 4 steel stringers: Tw=0.32, Tf=0.41, H=16”, Wf=5.6255”, likely W16x31 spaced at 37". Steel stringers are still in good condition with light rust. Bracing spaced 8’ oc, the center diaphragm has only a single bolt holding it in place. Sill is comprised of (5) 2x12s resting on ground.

Deck: 3x8 boards with 1 3/4" spacing between adjacent boards. The deck shows scaring and deterioration from years of use. Running plank c-c=60”.

Running planks broken, rotting and partially missing. The approach span in the NE is becoming overgrown and shows significant deterioration and rot.

Several deck boards are heavily rotted.

The scour and undermining in the NW quadrant of this bridge results in a NBI Rating of 3 from the previous inspection. This has been improved by adding rocks underneath the sill. Additional work such as replacing the deck, improving approaches, and raising the sills should be considered to make the bridge more resilient long term.

Bridge Flare (Y/N):

Tr. Bridge Name: Feature Crossed: 0 31393-0.40HRWAT #3

TRACS

Tr. Bridge Name: Feature Crossed: 0 31393-0.40HRWAT #3

Inspection Date: 12

Inspected by:

N

Railing -

Direct bearing on wood sill. No anchor bolts.

Mostly intact. Rust mainly along beam webs.

All

9/28/2023

Steve Wright, P.E.

Description:

36. User Barriers:

Post -

Curb -

NOB

Good

Good

Good

Single 2x member.

A jumble of stacked wood with heavy deterioration.

CONDITION CODES and REMARKS

Stringers/Girders

Diaphrams/Bracing

Stringers/Girders

REMARKS

Around 1/4 of boards are gone. Heavy weathering, some gouging.

Rot section loss multiple planks.

Moss & lichen growth.

Fair

Poor

Good

CODE

Bearings

Paint

Bracing

Floor Beams

Stringers/Girders

Inspection Frequency (Months):

(4) Steel stringers with minor surface rust.

ITEM

Wearing Surface:

58. DECK:

Cleanliness

Deck Slab/Panels

Drains and Drainage

Utilities

Deck Joints

Failed

Rotten and falling apart .

Flooring

Girder

59. SUPERSTRUCTURE (Main Span):

Bearings

Paint

Bracing

Floor Beams

All

Flooring

Girder

Diaphrams/Bracing

Stringers/Girders

59. SUPERSTRUCT (Approach Span):

Tr. Bridge Name: Feature Crossed: 0 31393-0.40HRWAT #3

MEET

User Barrier

Bridge Grade

Trail Alignment

Trail Grade

Tread Width

Other

TRAIL APPROACHES:

Approach Settlement

Shoulder Embankment

Surfacing

71.WATERWAY ADEQUACY:

Sill/Grade Beam

P ie rs

61. Channel

Minor scour under abutment 2 at the NW quadrant. Prev. scour repaired.

No back wall. Girder ends exposed.

Poor

NOB

Fair

Good

Fair

Wood sill on bare ground or rocks.

Sill/Grade Beam

Good

Poor

Failed

NOB

Fair

All

60. SUBSTRUCTURE:

Alignment/Settlment/Skew

Scour/Erosion

Backing Plank/Backwall

Gabion/Reinforced Earth

Opening/Stream Constraint

Vertical Underbridge Opening

COMPONENT

Deck Width

VALUE

Fair

Poor

Good

Poor

Channel Protection

Channel Scour/Erosion

Vegetation

Waterway Obstruction/Drift

Appraisal – Bridge Elements Meet TMO? (Print TMO direct from INFRA Tr. Bridge Module)

Hiking trail/winter access path. Overgrown. Steep on east side.

REMARKS

Rock rapids. Full bottom armoring.

Sill Timbers ok

A bu tm en ts

Tr. Bridge Name: Feature Crossed: 0 31393-0.40HRWAT #3

TB-CPX-APR-SGN-02A

Add Object Marker signs

Any material $1629.2 / EACH 1

Repair undermining/scour of sills/footings per abutment

Task ID

Comments

Task ID

Comments

Task ID

Comments

Task ID

Comments

User_Barrier Timber $59.34 / LN FT 48

Task ID

Comments

Repair/replace/install Curb

Install timber curb

Task ID

Comments

Task ID

Comments

Basic Maintenance

Wearing_Surface Timber $13.80 / SQ FT - Replace in-kind 204 Task ID

Comments

Wearing Surface-Repair/replace/install

Inspection Steel $1725 / EACH - Difficult 1

Task ID

Comments

Inspection-deck girder, side girder, single unit slab/beam

Task ID

Comments

Deck Timber $6.42 / SQ FT 204

Task ID

Comments

Replace plank deck

Comments

Approaches Task ID Any material $228.33 / EACH

TB-CPX-SUB-GEN-02A

HIGH PRIORITY. Repair scour

Repair/replace approach fills per bridge

Item Category Task Material Cost/Unit Severity

Quantity

Approaches Any material $678.88 / LS 2

Task ID

Comments

TB-CPX-APR-EMB-02B

Replace approach

Tasks

Repair/replace/install safety signage

Substructure

Whole_Bridge Any material $1.99 / SQ FT

TB-CPX-DCK-TBR-02A

Replace rotten deck boards

TB-CPX-INS-LDR-02B

TB-CPX-WHL-01A

Load rate

TB-CPX-WSF-TBR-02A

TB-CPX-CRB-TBR-02A

Tr. Bridge Name: Feature Crossed: 0 31393-0.40HRWAT #3

Task ID

Comments

Task ID

Comments

Task ID

Comments

Task ID

Comments

Task ID

Comments

Task ID

Comments

Task ID

Comments

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Comments

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Comments

Task ID

Comments

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Tasks

Item Category Task

Task ID

Comments

Task ID

Comments

Material Cost/Unit Severity

Quantity

X

** As needed, insert additional pages for photos of structure and/or site.

33'

22.5'

0'' 0''

16'' 5.625''

60''

144''

HRWAT #3Structure Name: Feature Crossed: 0 Trail #-MP: 31393-0.40

0''

0''

34'

37" 9.25'

9/28/2023

River Left Approach

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River Right Approach

Trail #-MP: 31393-0.40 Feature Crossed: 0.0000

BRIDGE PHOTOS

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Date:Structure Name: HRWAT #3

BRIDGE PHOTOS - cont.

Looking Upstream from the Bridge Deck

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Looking Downstream from the Bridge Deck

Structure Name:

Feature Crossed: 0.0000

HRWAT #3 Date: 9/28/2023

Trail #-MP: 31393-0.40

Looking Upstream - Elevation Profile

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Looking Downstream - Elevation Profile

Structure Name:

Feature Crossed: 0.0000

HRWAT #3 Date: 9/28/2023

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River Right Abutment

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River Left Abutment

Structure Name:

Feature Crossed: 0.0000

HRWAT #3 Date: 9/28/2023

View of Superstructure

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View of Superstructure

Structure Name:

Feature Crossed: 0.0000

HRWAT #3 Date: 9/28/2023

Scour at NW Quadrant

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Trail approach and approach ramp

Structure Name:

Feature Crossed: 0.0000

HRWAT #3 Date: 9/28/2023

Deck decay

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Condition at approach and main span transition

Structure Name:

Feature Crossed: 0.0000

HRWAT #3 Date: 9/28/2023