Attachment 3_Margaret Bay_Report.pdf

United States Department of Agriculture Remote Dock and Marine Facility Inspections

Southeast Alaska/Tongass National Forest

MATOC Agreement No. 1205G219D005 Task Order No. 12010920F0013

Inspection of Margaret Bay Remote Dock Revillagigedo Island|Ketchikan-Misty Ranger District

Inspection October 6, 2020

United States Department of Agriculture

Remote Dock and Marine Facility Inspections Southeast Alaska/Tongass National Forest

Contract No. 12010920F0013

Inspection of Margaret Bay Remote Dock Revillagigedo Island | Ketchikan-Misty Ranger District

Inspected October 6, 2020

Report Date: September 29, 2021

Joshua Steiner, PE Inspection Leader CONSOR Engineers, LLC

Heath Pope, PE Vice President CONSOR Engineers, LLC

Margaret Bay Remote Dock

TABLE OF CONTENTS

1 Scope of Work and Inspection Procedure

2 Definitions, Rating Criteria, and Terminology

3 Facility Description

4 Inspection Findings

4.1 General Inspection Findings

4.2 Cathodic Protection System

4.3 Access Trestle

4.4 Pin and Hanger System

4.5 Gangway

4.6 Guide Piles

4.7 Pile Guides

4.8 Docks

5 Repair Recommendations

Appendix A Damage Rating Criteria ..................................................................................................... A-1

Appendix B Facility Sketches ................................................................................................................. B-1

Appendix C Photos ................................................................................................................................ C-1

1 SCOPE OF WORK AND INSPECTION PROCEDURE

In October 2020, CONSOR Engineers, LLC performed inspections of 16 Forest Service dock facilities in

Southeast Alaska. These inspections were performed with the assistance of Mott MacDonald and R&M

Engineering for SCJ Alliance, under contract to the United States Department of Agriculture (USDA).

The purpose of these inspections was to document and assess the dock facility's existing condition, develop rehabilitation/repair recommendations, and provide the documented field information for the future rehabilitation/repair engineering design and contractor bidding phases. The services performed included a Repair Design Inspection of the accessible underwater and above water structural elements composing the facilities and preparation of inspection reports summarizing the findings and repair recommendations. All inspections were performed in accordance with ASCE MOP 130: Waterfront

Facilities Inspection and Assessment.

The dock facilities were inspected by a crew of five inspectors, led by a Professional Engineer familiar with inspection of waterfront facilities. The docks were accessed by boat, and the above water inspection was performed using various hand tools, measuring devices, and cameras. The underwater inspection was performed using tethered SCUBA with hardwire communications equipment, using various hand tools, an ultrasonic thickness measuring gauge, bathycorrometer, and cameras.

2 DEFINITIONS, RATING CRITERIA, AND TERMINOLOGY

The conditions of the dock facility and structural systems are rated in accordance with MOP 130 according to the Condition Assessment Rating below. Additionally, the inspected structural elements are assigned damage ratings from Minor to Severe, shown in Appendix A.

CONDITION ASSESSMENT RATINGS

6 – Good No visible damage or only minor damage noted. Structural elements may show very minor deterioration, but no overstressing observed. No repairs are required.

5 – Satisfactory Limited minor to moderate defects or deterioration observed but no overstressing observed. No repairs are required.

4 – Fair All primary structural elements are sound but minor to moderate defects or deterioration observed. Localized areas of moderate to advanced deterioration may be present but do not significantly reduce the load-bearing capacity of the structure.

Repairs are recommended, but the priority of the recommended repairs is low.

3 – Poor Advanced deterioration or overstressing observed on widespread portions of the structure but does not significantly reduce the load-bearing capacity of the structure.

Repairs may need to be carried out with moderate urgency.

2 – Serious Advanced deterioration, overstressing, or breakage may have significantly affected the load-bearing capacity of primary structural components. Local failures are possible and loading restrictions may be necessary. Repairs may need to be carried out on a high-priority basis with urgency.

1 – Critical Very advanced deterioration, overstressing, or breakage has resulted in localized failure(s) of primary structural components. More widespread failures are possible or likely to occur, and load restrictions should be implemented as necessary. Repairs may need to be carried out on a very high-priority basis with strong urgency.

3 FACILITY DESCRIPTION

The facility at Margaret Bay includes a steel pipe pile-supported access trestle, gangway, floating main dock, and floating finger dock.

The floating main dock is a timber frame with plastic coated foam floatation secured by four steel pipe guide piles, rigidly connected at the top with steel pipes of the same dimension. The perimeter of the dock has a timber curb on timber chocks, with various mooring hardware mounted to the curb. The fender system consists of rubber tires attached on all faces of the dock.

The floating finger dock is a timber frame with timber log floatation secured by two steel pipe guide piles. There is no curb present on the dock and the mooring hardware is connected directly to the deck.

The fender system consists of rubber tires attached on the inshore, offshore, and left faces of the dock.

The general layout of the facility is shown below.

Figure 1: General Layout

Access to the dock is provided by a steel gangway connected to the access trestle.

The access trestle is 62 ft long x 6 ft wide with a 42 in. high handrail. The access trestle is supported by four bents, each consisting of two steel pipe piles with a W8x31 steel pile cap. The bents support timber stringers with a timber deck and timber handrail.

The steel gangway is 65 ft long x 63 in. wide with a 42 in. high handrail and top and bottom transition plates. The gangway surface is constructed of metal grating with 30 in. long x 3/4 in. square stock treads on the left half. The gangway is connected to the access trestle by pin and hanger assemblies and supported by the dock with a skid-style landing consisting of steel channels without UHMW (ultra-high molecular weight) material.

The water depths at the site vary from 14.3 ft to 29.5 ft relative to Mean Lower Low Water and are referenced to Tide Station 9450460 Ketchikan, AK.

This facility is typically used by recreational boaters for pedestrian access to the shore. There were six vessels present at the time of inspection, varying from 10 ft to 50 ft in overall length. There were no Forest

Service barges present at the time of inspection.

Drawings and photos are presented in Appendix B: Facility Sketches and Appendix C: Photos, respectively.

4 INSPECTION FINDINGS

4.1 GENERAL INSPECTION FINDINGS

Overall, the facility is in fair condition, primarily due to damage to the floating finger dock wale and insufficient floatation of both the main and finger dock. Detailed inspection findings for the individual structural components are presented below.

4.2 CATHODIC PROTECTION SYSTEM

There was no cathodic protection system observed at the site. Pile thickness and cathodic potential measurements are presented in Section 4.6 Guide Piles.

4.3 ACCESS TRESTLE

The access trestle is in satisfactory condition with limited minor deficiencies described below.

HANDRAIL

No deficiencies were observed on the timber handrail at the time of inspection. There is more than 4 in.

of clear space between intermediate rails.

DECK

No deficiencies were observed on the timber deck planks at the time of inspection. The timber decking has minor algae growth on the bottom.

FRAMING

The trestle framing exhibits minor rot and algae growth on the bottom of the stringers.

STEEL PILE CAPS

No deficiencies were observed at the time of inspection.

STEEL PIPE PILES AND TIMBER BRACING

The piles exhibited minor surface corrosion. The offshore pile bent has timber cross braces with no observed deficiencies at the time of inspection.

4.4 PIN AND HANGER SYSTEM

The pin and hanger system is in satisfactory condition with minor surface corrosion. There is no redundant safety system.

4.5 GANGWAY

The gangway, including the top and bottom transition plates, is in satisfactory condition. There is no

UHMW material on the gangway landing skid plates and there is more than 4 in. of clear space between the intermediate rails.

4.6 GUIDE PILES

The guide piles are in satisfactory condition with no significant deficiencies noted at the time of inspection. The trestle piles are 12.9 in. diameter and 1/2 in. thick, and the dock piles are 16.2 in. diameter and 1/2 in. thick. All piles exhibit surface corrosion with minor section loss. The piles at trestle Bents 1 and

2 are dry at low tide. Thickness measurements are provided in the table below (10% of piles were required to be measured).

Table 1: Pile Section Loss

Pile ø

(in.)

Material

Steel Thickness (in.) Section Loss (in.2)

Original Waterline Midheight Mudline Original

Area Remaining

Area % Section

Loss

4L (Trestle)

12.9 Steel 0.500 0.498 0.498 0.500 19.5 19.4 0.4%

6 (Dock) 16.2 Steel 0.500 0.488 0.490 0.498 24.7 24.1 2.5%

The cathodic potential readings were normal for bare carbon steel in seawater without cathodic protection. Cathodic potential readings are presented in the table below (10% of piles were required to be measured).

Table 2: Cathodic Potential Readings

Pile ø (in.) Material Cathodic Potential Readings (mV)

Waterline Midheight Mudline Average

4L (Trestle) 12.9 Steel -741 -730 -730 -734

6 (Dock) 16.2 Steel -638 -660 -662 -653

4.7 PILE GUIDES

The pile guides are in fair condition. Three of the pile guides on the main dock have missing or detached

UHMW material. The pile guides on the finger dock are too large and have no UHMW material, resulting in the dock rubbing on the pile causing abrasion of the timber.

4.8 DOCKS

The docks are in fair condition, primarily due to damage to the floating finger dock wale and insufficient floatation of both the main and finger dock. All underwater portions of the docks exhibited heavy marine growth.

The transition plate between the main dock and finger dock consists of a steel plate connected to the finger dock with two hinges. One of the hinge connections has failed and the other connection is loose.

4.8.1 Main Dock

FLOATS

The float material is plastic encased foam and is located uniformly throughout the footprint of the float.

The freeboard of the float varies from 9.5 in. to 14 in. resulting in a non-level deck surface that is typically lower at the gangway landing.

FRAMING

No deficiencies were observed at the time of inspection. The configuration of the framing system is shown in the drawings in Appendix B.

DECKING

The decking consists of 11.5 in. x 3 in. timber planks. There are three burn holes in the deck up to 7 in. x 7

in. x 3 in. deep. The deck has vegetation and algae growth concentrated around the pile guides, corners, and edges of the float. There is a T-shaped strip of composite walking surface leading from the gangway landing to the offshore face.

CURB

The curb consists of 6 in. x 6 in. timbers supported on chocks of the same dimensions spaced at varying intervals. The curbs have minor deterioration and one 4 ft long broken section.

MOORING HARDWARE

The mooring hardware consists of various sized cleats connected to the curb. There are nine loose cleats and three missing or broken cleats.

FENDER SYSTEM

There are intermittently placed tires around the perimeter of the dock with an 8 ft section of missing tires.

4.8.2 Finger Dock

FLOATS

The float material is 12 in. diameter logs. The freeboard of the float varies from 5 in. to 15 in resulting in a non-level deck surface and is typically lower at the left end.

FRAMING

The timber framing system exhibits heavy marine growth and the inshore wale is cut in two locations to fit the pile guides. The configuration of the framing system is shown in the drawings in Appendix B.

DECKING

The decking consists of 11.5 in. x 1.5 in. timber planks with minor deterioration due to vegetation and algae throughout. There are two deck planks that are unsupported by the frame in one location. The pile guides are too large for the piles and the deck and framing has been cut to fit the guides. Due to the overly large guides, the left guide pile rubs on the dock and has abraded some of the decking and loosened a cleat. The offshore left corner of the finger dock has asphalt roofing shingles overlaying the deck planks.

CURB

No curb is present on the finger dock.

MOORING HARDWARE

The mooring hardware consists of 8 in. cleats connected to the timber deck planks. There are eight loose cleats and three missing or broken cleats.

FENDER SYSTEM

There are intermittently placed tires on the left, offshore, and half the inshore face of the dock.

4.9 SAFETY LADDER

There is no safety ladder present at the site presenting a hazard in the event of a fall.

5 REPAIR RECOMMENDATIONS

The following table summarizes the repair recommendations for this facility.

Table 3: Priority Repair Recommendations

Structure Element Location Quantity Defect Repair Priority Comments

Dock Safety Ladder Above Water 1 EA No safety ladder present Install safety ladder 1-High Safety - Provide safe emergency egress from water

Finger Dock Framing Above Water 20 LF Cut wales at guide piles Replace 3x12 wales after replacing pile guides.

1-High Structural - Restore orignal capacity

Finger Dock Pile Guides Above Water 2 EA Incorrectly sized pile guides Replace pile guides with appropriately sized guides with UHMW.

1-High Structural – Reduce deterioration rate

Finger Dock Floatation Modules

Below Water 1 LS Insufficient floatation resulting in uneven freeboard

Install additional floatation on left side to provide consistent 14 in. freeboard of the floating dock.

1-High Structural – Provide consistent freeboard of dock

Gangway Gangway Skids

Above Water 24 LF Missing UHMW skid material Install UMHW material at gangway landing

1-High Structural – Reduce deterioration rate

Gangway Pin and Hanger

Above Water 2 EA No redundant gangway support system Install redundant safety system 1-High Safety – Provide a redundant anchorage point for the gangway

Main Dock Floatation Modules

Below Water 1 LS Insufficient floatation resulting in uneven freeboard

Install additional floatation on inshore side to provide consistent 14 in.

freeboard of the floating dock.

1-High Structural – Provide consistent freeboard of dock

Main Dock Pile Guides Above Water 3 EA Loose UMHW at Piles 3 and 4, missing UMHW section at Pile 5

Secure loose UMHW and replace missing UMHW

1-High Structural – Reduce deterioration rate

Finger Dock Mooring Hardware

Above Water 12 EA (8) 8 in. loose cleats and (3) 8 in.

missing cleats

Remove and stockpile cleats. Install (6) 8 in. cleats (12 total) on offshore and inshore faces on new curb

2-Med Convenience – Provide secure mooring

Finger Dock Curb Above Water 150 LF No curb Install 6x6 composite curb. 2-Med Convenience/Safety - Provide safe mooring and berthing

Main Dock Mooring Hardware

Above Water 12 EA (4) 12 in., (5) 10 in. loose cleats and (3) 10 in. missing cleats

Remove and stockpile cleats. Install (4) 12 in. cleats on offshore face and (4) 10

in. cleats (8 total) on left and right faces on new curb

2-Med Convenience – Provide secure mooring

Main Dock Curb Above Water 165 LF Deteriorated timber curb Remove 6x6 timber curb and replace with 6x6 composite curb.

2-Med Structural – Reduce deterioration rate

Main/Finger Docks

Pile Corrosion Protection

Below Water 6 Piles No corrosion protection system Provide sacrificial anode cathodic protection system

2-Med Estimated min. mudline depth 14.3 ft

Main/Finger Docks

Decking Above Water 2400 SF Slick deck with isolated deterioration Install non-slip composite decking surface.

2-Med Structural/Safety– Reduce deterioration rate and mitigate slip hazard

Trestle Pile Corrosion Protection

Above/Below Water

6 Piles Minor corrosion of piles Clean and paint Bent 2 trestle piles with zinc-rich paint. Provide sacrificial anode cathodic protection system for piles at Bents 3 and 4

2-Med Structural – Reduce corrosion rate

Main/Finger Docks

Dock Transition Plate

Above Water 2 EA Loose connection hardware Replace loose connection hardware. 3-Low Safety - Mitigate trip/fall hazard

Main/Finger Docks

Fender System

Waterline 170 LF Tire-only fender system with 2 missing tires

Remove tires and install rubber D fender system along left, right, and offshore faces of main dock and finger dock.

3-Low Convenience/Safety - Provide safe mooring and berthing

Gangway Handrails Above Water 520 LF Rails do not meet IBC/ADA Standards Install intermediate rails to provide a maximum clear spacing of 4 in.

4-Option Safety – Mitigate fall hazard

Trestle Handrails Above Water 250 LF Rails do not meet IBC/ADA Standards Install intermediate rails to provide a maximum clear spacing of 4 in.

4-Option Safety – Mitigate fall hazard

A-1

Appendix A Damage Rating Criteria

A-2

Source: ASCE MOP 130 Waterfront Facilities Inspection and Assessment.

A-3

Source: ASCE MOP 130 Waterfront Facilities Inspection and Assessment

A-4

A-5

A-6

A-7

Source: POLATRAK CP Gun Operation Manual

B-1

Appendix B Facility Sketches

Dock: Margaret Bay Island: Revillagigedo Ranger District: Ketchikan-Misty Inspection Date: October 6, 2020

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

11.5"x1.5" DECK

PLANKS (TYP)

16.2" Ø x 0.5" W.T. STL

PIPE PILE

DWG 1 General Layout - Dock

PILE 1

X.X" X.X'

10.0" 16.7'

14.0" 27.2'

Water depth is presented relative to MLLW based on Tide Station 9450460 Ketchikan, AK

ACCESS TRESTLE

30" x 3 4" STOCK

TREADS @ 16" O.C.

A

FREEBOARD (INCHES)

DEPTH (FEET)

CLEAT

GANGWAY

GANGWAY

CROSS BRACE

MUDLINE

HANDRAIL

PILE CAP (TYP)

11.5"x2.75" DECK

PLANKS (TYP)

W 8x31 PILE CAP (TYP)

65' GANGWAY

6'

20' (TYP)

14.0" 29.5'

13.0" 19.8'

15.0" 21.3'

9.5" 17.0'

5.0" 14.9'

11.5"x3" DECK PLANKS (TYP)

36'-6"

48'-6"

10'

26'-9"

27'-9"

6'

21'-6"

18'

60'-6"

9.5" 14.3'

STEEL GANGWAY

L

R

2 134

PILE 2

PILE 3

PILE 4

PILE 6

PILE 5

16.2" Ø x 0.5" W.T. STL

PIPE PILE

12.9" Ø x 0.5" W.T.

STL PIPE PILE

12.9" Ø x 0.5"

W.T. STL

PIPE PILE

16"x16"x1

2" STL

PLATE (TYP)

62' ACCESS TRESTLE

WATERLINE (VARIES)

DECK PLANKS

2 134

62' ACCESS TRESTLE

5'-3"

6"x12" TIMBER STRINGERS

RUBBER TIRE (TYP)

PILE TOP BRACING

B

STEEL GRATE

TIMBER CROSS BRACE

3'-6"

PIN AND

HANGER

PIN AND

HANGER

PIN AND

HANGER

PILE CAP

6"x6" TIMBER

CURB (TYP)

TRANSITION

PLATE

TRANSITION

PLATE

TRANSITION PLATE

24' 21'

11'

10" CLEAT

12" CLEAT

10" CLEAT

8" CLEAT (TYP)

DOCK GENERAL PLAN

0 5' 10'

SCALE: 3/32"=1'-0" OFFSHORE INSHORE

TRESTLE ELEVATION

0 8' 16'

SCALE: 1/16"=1'-0" OFFSHORE INSHORE

TRESTLE GENERAL PLAN

0 8' 16'

SCALE: 1/16"=1'-0" OFFSHORE INSHORE

1.00"0.50"

7.50"

2.00"

3.00"

6.50"

1.00"

1.00"

2.50"

2.50"

ACCESS TRESTLEGANGWAY

DECK PLANK

1/2" THICK

ANCHOR PLATE

3/4" THICK HANGER

7/8" Ø x 6" LONG PIN

7/8" Ø x 6" LONG PIN

HANGER

1/2" THICK

ANCHOR PLATE

2.75"

0.75"

3.50"

2.50"

ACCESS TRESTLEGANGWAY

6.00"

Dock: Margaret Bay Island: Revillagigedo Ranger District: Ketchikan-Misty Inspection Date: October 6, 2020

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

11.5"x2.75" DECK BOARDS (TYP)

DWG 2 Sections and Details

W 8x31 PILE CAP (TYP)

12.9" Ø x 0.5" W.T.

STL PIPE PILE

2.5"x9.25" TIMBER

CROSS BRACE

MUDLINE (VARIES)

8'-6" (TYP)

16.2" Ø x 0.5" W.T. STL

PIPE PILE (BEYOND)

48'-6"

2'-8"

11.5"x3" DECK PLANKS

3"x18" TIMBER @ 28" O.C.

9"x6" TIMBER (TYP)

16.2" Ø x 0.5" W.T. STL

PIPE PILE (BEYOND)

11.5"x1.5" DECK PLANKS

60'-6"

18' 27'-9"

6"x12" TIMBER (TYP)

4.25"x12" TIMBER (TYP)

12" Ø TIMBER @ 3' O.C.

8"x12" TIMBER

4' (TYP)

12"x12" TIMBER

VARIESVARIES

6"x12" TIMBER STRINGERS

3'-6"

6"x12" TIMBER STRINGER

(AT PILE CAP ONLY)

2"x6" TIMBER RAIL 4"x4" TIMBER HANDRAIL POST @ 3' O.C.

4'-6"

16"x16"x1

2" STL PLATE (TYP)

6'

PIN AND HANGER ELEVATION

11.5"x2.75" DECK BOARDS (TYP)

W 8x31 PILE CAP (TYP)

12.9" Ø x 0.5" W.T.

STL PIPE PILE

MUDLINE (VARIES)

6"x12" TIMBER STRINGERS

3'-6"

6"x12" TIMBER STRINGER

(AT PILE CAP ONLY)

2"x6" TIMBER RAIL

4"x4" TIMBER HANDRAIL POST @ 3' O.C.

4'-6"

16"x16"x1

2" STL PLATE (TYP)

6'

12'

MAIN DOCK CROSS SECTION A-A

0 4' 8'

SCALE: 1/8"=1'-0"

FINGER DOCK CROSS SECTION B-B

0 4' 8'

SCALE: 1/8"=1'-0" LEFT RIGHT

TRESTLE BENT 4 CROSS SECTION

LEFT RIGHTSCALE: 3/16"=1'-0"

0' 1' 2' 4' 6'

TRESTLE BENTS 1-3 CROSS SECTION

LEFT RIGHTSCALE: 3/16"=1'-0"

0' 1' 2' 4' 6'

0 3" 6"

SCALE: 3"=1'-0" OFFSHORE INSHORE

OFFSHORE INSHORE

PIN AND HANGER PLAN

0 3" 6"

SCALE: 3"=1'-0" OFFSHORE INSHORE

Dock: Margaret Bay Island: Revillagigedo Ranger District: Ketchikan-Misty Inspection Date: October 6, 2020

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 3 Deficiency Plan

PILE 1

ACCESS TRESTLE

GANGWAY

MUDLINE

65' GANGWAY

20' (TYP)

STEEL GANGWAY

L

R

2 134

PILE 2

PILE 3

PILE 4

PILE 6

PILE 5

12.9" Ø x 0.5" W.T.

STL PIPE PILE

62' ACCESS TRESTLE

WATERLINE (VARIES)

2 134

62' ACCESS TRESTLE

PIN AND HANGER WITHOUT

REDUNDANT SAFETY SYSTEM

PIN AND

HANGER

PILE CAP

MISSING UHMW

BROKEN TRANSITION

PLATE CONNECTIONS

TRANSITION PLATE

TYPICAL DEFICIENCIES

1. Access trestle has minor rot and algae growth on bottom of stringers and deck planks.

2. All steel piles exhibit minor corrosion below the waterline.

3. Timber decking on both docks is deteriorated with vegetation and algae growth.

CUT WALE AND ABRADED DECK

CUT WALE AND DECK

BURN

HOLES

MISSING UHMW

MISSING UHMW

MISSING UHMW

MISSING TIRES

BROKEN CURB

BURN

HOLE

GREATER THAN 4" CLEAR SPACING

BETWEEN INTERMEDIATE RAILS

PIN AND HANGER WITHOUT

REDUNDANT SAFETY SYSTEM

PILE GUIDE IS TOO LARGE

AND HAS NO UHMW

PILE GUIDE IS TOO LARGE

AND HAS NO UHMW

LOW FREEBOARD DUE TO

INSUFFICIENT FLOATATION

MINOR DETERIORATION

OF CURB (TYP)

UNSUPPORTED DECK PLANKS

MISSING CLEAT

(TYP)

LOOSE CLEAT

(TYP)

DOCK DEFICIENCY PLAN

0 5' 10'

SCALE: 3/32"=1'-0" OFFSHORE INSHORE

TRESTLE DEFICIENCY ELEVATION

0 8' 16'

SCALE: 1/16"=1'-0" OFFSHORE INSHORE

TRESTLE DEFICIENCY PLAN

0 8' 16'

SCALE: 1/16"=1'-0" OFFSHORE INSHORE

C-1

Appendix C Photos

C-2

Photo 1: General view of the facility.

Photo 2: General view of access trestle and gangway.

C-3

Photo 3: Typical access trestle bent configuration.

Photo 4: General view of trestle framing. Note minor algae growth.

C-4

Photo 5: General view of the end of access trestle and gangway.

Photo 6: General view of the pin and hanger assembly.

C-5

Photo 7: View of gangway landing. Note there is no UMHW material installed.

Photo 8: General view of the main dock.

C-6

Photo 9: Typical main dock pile guide. Note the missing UMHW material.

Photo 10: Partially broken curb.

C-7

Photo 11: Burn holes in deck.

Photo 12: Missing tires on main dock.

C-8

Photo 13: Transition plate between main dock and finger dock. Note the detached and loose connections.

Photo 14: General view of the finger dock. Note cut wale for pile and vegetation growth in deck.

C-9

Photo 15: Low freeboard on the finger dock.

Photo 16: Typical pile condition underwater with no significant damage.