Sitka Marine Facility_Inspection 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 Sitka Marine Facility Baranof Island|Sitka Ranger District

Inspection April 11-12, 2021

United States Department of Agriculture

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

Contract No. 12010920F0013

Inspection of Sitka Marine Facility Baranof Island | Sitka Ranger District

Inspected April 11-12, 2021

Report Date: September 29, 2021

Joshua Steiner, PE Inspection Leader CONSOR Engineers, LLC

Heath Pope, PE Vice President CONSOR Engineers, LLC

Sitka Marine Facility

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 Abutment

4.4 Access Trestle

4.5 Pin and Hanger System

4.6 Gangway

4.7 Guide Piles

4.8 Pile Guides

4.9 Docks

4.10 Safety Ladder

5 Repair Recommendations

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

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

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

Appendix D Critical Finding Email ......................................................................................................... D-1

1 SCOPE OF WORK AND INSPECTION PROCEDURE

In April 2021, CONSOR Engineers, LLC performed inspections of seven 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 the 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 the development of an inspection report that summarized the findings and repair recommendations. All inspections were performed in accordance with ASCE MOP 130: Waterfront

Facilities Inspection and Assessment.

The 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 commercial SCUBA with hardwire communications equipment, using various hand tools, an ultrasonic thickness measuring gauge, cathodic potential meter, and cameras.

2 DEFINITIONS, RATING CRITERIA, AND TERMINOLOGY

The conditions of the 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 Sitka Marine Facility includes a timber pile-supported access trestle, steel gangway, steel guide piles, and seven floating docks.

The floating docks are constructed of various timber members and are supported by plastic-coated foam floats bound by various timber wales.

The docks are connected and secured in various ways:

• Dock A, is secured by four steel pipe piles rigidly connected at the top with a steel pipe of the same section.

• Dock B is connected to the offshore end of Dock A by two steel ring brackets and a steel shackle, with rubber tires between the docks that act as fenders.

• Dock C is connected to Dock A by a hinge and pin.

• Dock D is secured by one steel pipe pile and a hinge and pin connection to Dock A.

• Dock E is secured by one steel pipe pile and a hinge and pin connection to Dock D.

• Dock F is connected to Dock A by a hinge and pin.

• Dock G was disconnected at the time of inspection and was located under the gangway moored to Docks A and D. It appears that this dock may have been being used as a construction stage as there were various pipes and other materials on it during the inspection. There is a curb cut-out and hinge connection on the left side of Dock A where it is assumed that Dock G was originally connected.

The left, right, and inshore faces of Dock A have timber curbs on timber chocks. Dock A has mooring hardware mounted to the curb and deck, while all other docks have mooring hardware mounted directly to the deck with no curbs. The fender system consists of rubber tires nailed to left, right, and inshore faces of Dock B, and pneumatic fenders tied to the offshore end of Dock B. The general layout of the facility is shown in Figure 1 and the dock designations are shown in Figure 2.

Figure 1: General Layout

Figure 2: Dock Designations

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

The access trestle is 148.3 ft long x 6 ft wide with a 38.5 in. high handrail. The access trestle is supported at the inshore end by a masonry retaining wall and the rest of the trestle is supported by nine bents, each consisting of two timber piles with timber cross braces and a timber cap. The bents support timber stringers with a timber deck and timber handrail.

The steel gangway is 50 ft long x 68 in. wide with a 37.25 in. high handrail and top and bottom transition plates. The gangway surface varies: the left 24 in. consists of fiber reinforced polymer (FRP) grating, and the right 37 in. is 11.5 in. x 1.75 in. timber deck planks overlain by an asphalt shingle mat. The gangway is connected to the access trestle by pin and hanger assemblies and is supported by the dock with a skid-style landing consisting of steel angle shapes topped with UHMW (ultra-high molecular weight) wear pads.

The water depths at the dock vary from 5.2 ft to 12.6 ft relative to Mean Lower Low Water and are referenced to Tide Station 9451600 Sitka, AK.

This facility is typically used by US Forest Service personnel. The vessels observed at this site include motorboats up to 30 ft in overall length. Additionally, Dock C has two kayak racks attached to it, with two kayaks in each rack. As this is a private Forest Service facility, it is assumed they are Forest Service kayaks.

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 critical condition due to wallowing of the pin and hanger system resulting in a remaining steel thickness of 1/4 in. at the most deteriorated location. A critical finding email was sent immediately upon discovery and is provided in Appendix D. 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 4.7 Guide Piles.

4.3 ABUTMENT

The masonry retaining wall serving as the abutment is in satisfactory condition. There are bushes growing out of the wall adjacent to the trestle.

4.4 ACCESS TRESTLE

The access trestle is in fair condition. Detailed inspection findings for the individual structural components are presented below.

There is a gate with heavily weathered timber and moderate corrosion of the hardware at the inshore end of the trestle recommended for replacement.

HANDRAIL

The timber handrails are in satisfactory condition with have minor weathering and vegetation growth.

DECK

The timber deck is in satisfactory condition, with a 2 in. diameter hole in one timber plank near Bent 5 and typical minor splits and checks.

FRAMING

The timber stringers are in satisfactory condition with no significant deterioration noted at the time of inspection.

TIMBER PILE CAPS

The pile caps are in fair condition with four of the nine caps exhibiting splits up to 1/2 in. wide at the ends.

TIMBER PILES AND BRACING

The timber piles and cross braces are in fair condition. There are four cross braces with end splits and all of the bottom cross brace bolts have minor corrosion.

4.5 PIN AND HANGER SYSTEM

The pin and hanger system is in critical condition due to wear on the hangers that has wallowed the pin holes resulting in a remaining steel thickness of 1/4 in. at the most deteriorated location. Additionally, the pins are missing a second lock nut, so the shank of the pin is too long, and the hangers have minor surface corrosion. There is no redundant anchorage system installed.

4.6 GANGWAY

The gangway, including the top and bottom transition plates, is in fair condition.

The top transition plate is missing one connection bolt and has a sharp edge resting on the gangway. The lower transition plate is missing 11 connection screws. The UMHW wear pad on the left gangway landing skid is loose.

The timber deck planks below the asphalt shingle mat typically have minor to moderate rot.

The gangway framing typically exhibits minor corrosion of the floor beams, and there is one floor beam with a corrosion hole in the web.

The handrails have typical minor corrosion on the top rail and angle braces. The timber intermediate rail boards and kick boards are heavily weathered and there is one broken intermediate rail board at the dock end of the gangway. The rails and walking surface do not meet ADA or IBC guidelines, however this is not required as this facility is not open for public use.

There is one small electrical wire running down the left side of the gangway, a water hose running down the left side of the gangway, and a moderately corroded conduit running down the right side of the gangway to a timber framed junction box mounted to the gangway at the dock end. There is conduit running out of this junction box that dangles into the water with minor abrasion.

4.7 GUIDE PILES

The guide piles are in good condition. The guide piles typically have minor surface corrosion below the high-water line. The guide piles connected to Docks D and E are open at the top with no pile caps.

Thickness measurements are provided in the table below (note: 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 Orig. Area Rem. Area % Area Lost

1L 12.75 Steel 0.375 0.385 0.385 0.370 14.6 14.4 1.4%

1R 12.75 Steel 0.375 0.375 0.375 0.360 14.6 14.0 4.1%

2L 16.2 Steel 0.375 0.400 0.345 0.340 18.6 16.9 9.5%

2R 16.2 Steel 0.375 0.385 0.365 0.360 18.6 17.9 4.1%

3L 16.2 Steel 0.375 0.380 0.370 0.390 18.6 18.4 1.4%

3R 16.2 Steel 0.375 0.380 0.370 0.365 18.6 18.1 2.7%

Note: Piles with greater than the original thickness is assumed to be due to mill tolerances.

The cathodic potential readings were normal for bare carbon steel in seawater without cathodic protection. Cathodic potential readings are presented in the table below (note: 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

1L 12.75 Steel -537 -675 -676 -629

1R 12.75 Steel -681 -684 -685 -683

2L 16.2 Steel -653 -658 -658 -656

2R 16.2 Steel -656 -658 -658 -657

3L 16.2 Steel -655 -655 -655 -655

3R 16.2 Steel -651 -651 -651 -651

4.8 PILE GUIDES

The pile guides are in good condition with no significant deficiencies noted at the time of inspection.

4.9 DOCKS

The docks are generally in satisfactory condition with isolated minor to moderate defects of various structural components. Detailed inspection findings for the individual structural components are presented below.

FLOATS

The floats are in satisfactory condition. There is one floatation billet on the left side of Dock A with a 6 in.

diameter x 2 in. deep hole in the bottom.

The docks are generally level with a typical freeboard of approximately 17.5 in. The only exception is Dock

B, with an offshore freeboard of approximately 14 in. and an inshore freeboard of 21 in., indicating insufficient floatation billets under the offshore end.

FRAMING

The timber framing members for the docks are in fair condition.

• Dock A has an upper wale with a split and minor abrasion on the left side adjacent to Dock C, and an upper wale with minor abrasion of the left side near the offshore end. Both Dock A to Dock B connections have wallowed with 1/4 in. section loss and the Dock A to Dock D right hinge pin exhibits moderate wear with 50% loss.

• Dock B framing had no significant defects at the time of inspection.

• Dock C has an offshore stringer with an end split up to 1/16 in. wide at the left end and the three timber stringers below the floatation billets have full length severe rot.

• Dock D has an upper wale with minor abrasion and impact damage on the right side and the middle timber stringer below the floatation billets has full length severe rot.

• Dock E inshore and offshore stringers have end splits up to 1/8 in. wide at the right end.

• Dock F has an upper wale on the offshore side that is loose near the right end.

• Dock G has an offshore stringer with an end split up to 1/16 in. wide at the left end.

DECKING

The decking is typically in fair condition with notable deficiencies limited to Dock A.

The decking of the docks consists of various sizes of timber planks. Asphalt shingle mats have been installed as an anti-slip surface at isolated locations on Dock A and around the perimeter of Dock B. The timber decking is identified in the drawings in Appendix B.

The timber deck of Dock A typically exhibits moderate rot of the deck planks over 15% of the structure, minor weathering, and isolated localized moss growth. There is one deck plank that is disconnected on the offshore left corner and a line of abrasion up to 1/4 in. deep where the Dock B transition plates bear on Dock A. There are no transition plates between Dock A and Docks C and F (4 in. wide gap).

CURB

The curb is in satisfactory condition. The curb on the left side of Dock A has a section of minor abrasion and the curb on the right side has a section with a split.

MOORING HARDWARE

The mooring hardware is in satisfactory condition and consists of 12 in., 18 in., and 24 in. cleats attached to the curbs and deck surface.

Dock D has two loose 12 in. cleats on the left side.

FENDER SYSTEM

The fender system is in poor condition. The only fenders are rubber tires nailed to left, right, and inshore faces of Dock B, and pneumatic fenders tied to the offshore end of Dock B. There are four missing tires, and no fender system on the other docks.

4.10 SAFETY LADDER

There is only one safety ladder. The existing safety ladder has heavy marine growth presenting a laceration hazard if used.

5 REPAIR RECOMMENDATIONS

The facility is in CRITICAL condition due to wallowing of the pin and hanger system resulting in a remaining steel thickness of 1/4 in. at the most deteriorated location. As this facility is not available for public use, the facility may remain open but it is recommended to replace the pin and hangers on a priority basis and monitor their condition until replacement. Employees should be made aware of the potential for collapse.

The following tables summarize the repair recommendations for this facility.

Table 3: Repair Recommendations

Structure Element Location Quantity Defect Repair Priority Comments Gangway Pin and

Hanger

Above Water 2 EA All hanger plates wallowed out with 1/4 in. remaining and no redundant safety sytem

Replace pin and hanger system and install redundant system

0-CRITICAL Safety – Prevent collapse and provide a redundant anchorage point for the gangway

Dock B Dock Connection

Tidal Zone 2 EA Wallowing of dock connections with 1/4 in. section loss

Install 2 new dock connections 1-High Structural - Restore original capacity

Dock B Floats Underwater 33 LF Offshore end of dock 7 in. lower than inshore end

Install additionall floatation billets to raise freeboard of offshore end to 21 in.

1-High Safety/Structural - Provide level surface and reduce deterioration rate

Dock D Dock Connection

Tidal Zone 1 EA Corrosion of right pin with 50% section losss

Replace 1 in. dia. x 10 in. long pin 1-High Structural - Restore original capacity

Gangway Decking Above Water 160 SF Moderate rot of deck planks Replace deck planks with non slip composite decking

1-High Structural - Reduce deterioration rate

Gangway Floor Beams Above Water 5.5 LF Corrosion hole in web of floor beam Replace one L6x4x5/16 floor beam 1-High Structural - Restore original capacity

Gangway Handrail Above Water 250 LF Corroded handrail and bracing Clean and paint rails with zinc-rich paint

1-High Structural - Reduce deterioration rate

Gangway Landing Skids Above Water 6 LF Loose UHMW material Replace UHMW connections 1-High Structural - Reduce deterioration rate

Mult. Docks Safety Ladder Tidal Zone 2 EA Adequate access to emergency ladders in the case of falling into the water

Install 2 emergency ladders to the Docks, evenly spaced around perimeter

1-High Safety - Provide safe emergency egress from water

Trestle Cross Braces Tidal Zone 18 EA Corroded lower connection hardware Replace 3/4 in. diameter timber bolts 1-High Structural - Reduce deterioration rate

Trestle Cross Braces Tidal Zone 4 EA Split cross bracing Replace timber members 1-High Structural - Restore original capacity

Trestle Caps Above Water 9 EA Minor end splits Replace or sister four split 10x10 caps and epoxy coat all cap ends

1-High Structural - Reduce deterioration rate

Abutment Masonry Wall Above Water 2 EA Vegetation growth from abutment wall on both sides

Remove vegetation growth 2-Med Structural - Reduce deterioration rate

All Docks Fender System

Tidal Zone 430 LF Missing 4 fender tires on Dock B and no fender system on other Docks

Install rubber D fender system on all floats

2-Med Convenience/Structural – Provide safe mooring and reduce abrasion of docks

Dock A Decking Above Water 2100 SF 15% of the deck planks with moderate rot and 30 LF of 1/4 in. abrasion from Dock B Transition plates

Install non-slip composite decking above timber deck planks

2-Med Safety/Structural - Provide non-slip surface and reduce deterioration rate

Dock A Floats Underwater 1 EA 6 in. dia. X 2 in. deep hole in bottom of float

Replace damaged float 2-Med Structural - Reduce deterioration rate

Dock A Piles Underwater 4 EA Guide Piles with up to 10% Section loss

Install Cathodic Protection 2-Med Structural - Reduce deterioration rate

Dock C Framing Underwater 45 LF Severe decay of framing below floats Replace 2x6 timber stringers 2-Med Structural - Restore original capacity

Dock D Framing Underwater 30 LF Severe decay of middle framing below floats

Replace 6x6 timber stringer 2-Med Structural - Restore original capacity

Dock D Top Wale Tidal Zone 10 LF Minor impact/abrasion to top wale Replace 2x10 top wale 2-Med Structural - Reduce deterioration rate

Dock F Upper Wale Tidal Zone 14 LF Loose wale board Replace 2x10 timber wale 2-Med Structural - Reduce deterioration rate

Gangway Bottom Transition Plate

Above Water 11 EA Missing connections Replace connection hardware 2-Med Structural - Reduce deterioration rate

Gangway Floor Beams Above Water 72 LF Minor corrosion of floor beams Clean and paint 13 L6x4x5/16 floor beams with zinc-rich paint

2-Med Structural - Reduce deterioration rate

Gangway Top Transition Plate

Above Water 1 EA Missing connection Replace connection hardware 2-Med Structural - Restore original capacity

Trestle Decking Above Water 900 SF Minor splits, and one plank with 2 in.

dia. Hole

Replace 2x9 timber deck planks with non-slip compostie decking

2-Med Safety/Structural - Provide non-slip surface and reduce deterioration rate

Dock A Curb Above Water 16 LF One split curb and one section of curb with abrasion

Replace 8x12 timber curb 3-Low Convenience – Provide secure mooring

Dock A Top Wale Tidal Zone 16 LF Minor abrasion of top wale Replace 3x10 timber wale 3-Low Structural - Reduce deterioration rate

Dock D Mooring Hardware

Above Water 2 EA Two loose 12.5 in. cleats Reinstall cleats 3-Low Convenience – Provide secure mooring

Dock F Safety Ladder Tidal Zone 1 EA Marine growth on ladder Remove marine growth and retract ladder for future deployment

3-Low Safety - Mitigate laceration hazard

Docks D and E Piles Above Water 2 EA No caps on piles Install steel caps on two piles 3-Low Structural - Reduce deterioration rate

Gangway Conduit Above Water 1 EA Loose conduit with abrasion in one location

Install conduit hanger 3-Low Structural - Reduce deterioration rate

Gangway Top Transition Plate

Above Water 1 EA Sharp edge of transition plate wearing on gangway

Remove sharp edge and install UHMW wear pad

3-Low Safety - Mitigate laceration hazard

Gangway Conduit Above Water 80 LF Corroded along full length on the right side of the gangway

Replace or clean and paint with zinc-rich paint

3-Low Structural - Reduce deterioration rate

Gangway Intermediate Rails and kick boards

Above Water 300 LF Heavily weathered rails and one section of broken intermediate rail

Replace 200 LF of 1x4 intermediate rail and 100 LF of 2x4 kick board

3-Low Safety - Mitigate fall hazard

Trestle Handrails Above Water 300 LF Weathering and moss growth Replace 600 LF of 2x6 and 300 LF of 2x4 timber rails

3-Low Structural - Reduce deterioration rate

Dock A Transition Plate

Above Water 2 EA No transition plate between Dock A and Docks C and F (4" gap)

Install transition plate between Docks A & F

4-Option Safety - Mitigate trip hazard

Dock G General Above Water 1 EA Dock currently disconnected and moored to Dock A and D

Reconnect to left side of Dock A (if desired) with two 1 in. dia. X 10 in.

long pins

4-Option Convenience – Provide secure mooring

Gangway Handrails Above Water 300 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

Gangway Junction Box Above Water 1 EA Abandoned junction box on left side of gangway

Remove 4-Option Option

Trestle Gate Above Water 1 EA Deteriorated gate Replace gate and connection hardware

4-Option Convenience – Increase facility security

A-1

Appendix A Damage Rating Criteria

A-2

Source: ASCE MOP 130 Waterfront Facilities Inspection and Assessment.

A-3

A-4

A-5

A-6

A-7

Source: POLATRAK CP Gun Operation Manual

B-1

Appendix B Facility Sketches

148'-3" ACCESS TRESTLE

17' (TYP)

9"x1.75" TIMBER PLANK DECKING TIMBER PILE (BELOW, TYP) TIMBER PILE CAP (TYP) TIMBER STRINGERS (TYP) MASONRY RETAINING WALLSPLICE (TYP)

12345678 6'

GATE

5'-9"

50' (GIRDER LENGTH)

PIN AND HANGER (TYP)

STEEL GANGWAY (SEE SHEET)

DOCK A

DOCK B

DOCK C

DOCK D

DOCK E

DOCK F

DOCK G MOORED HERE

DURING INSPECTION

DOCK HINGE (TYP)

PILE 3L (16.2" Ø

x 3/8" THICK)

PILE TOP BRACING

11.5"x7.5" TIMBER CURB ON 11.5"x5.5" TIMBER CHOCKS (TYP)

HINGE CONNECTION

FOR DOCK G

21'-6" CURB

8' CURB

9'-1"

46' CURB

6'-3"

14'

6'-3"

27'

6'-3"

14'

30'-6"

68'-10"24'-8"

32'-8"

PNEUMATIC

FENDER (TYP)

RUBBER TIRE (TYP)

ASPHALT SHINGLE

MAT (TYP)

11.5"x2.5" TIMBER

PLANK DECKING

9.5"x2" TIMBER

PLANK DECKING

5.5"x1.5" TIMBER PLANK DECKING

(TYP FOR DOCKS C TO G)

PILE 1L (12.75" Ø x 3/8" THICK)

JUNCTION

BOX

GANGWAY

LANDING SKID

3'-7.00"

3'-8.00"

11'-6" (TYP)

7'-5" (TYP)

PILE 3R (16.2" Ø

x 3/8" THICK)

PILE 2R (16.2" Ø

x 3/8" THICK)

PILE 1R (12.75" Ø x 3/8" THICK)

ACCESS

TRESTLE

18" CLEAT (TYP

THIS FACE)

24" CLEAT (TYP

THIS FACE)

DOCK CONNECTION

PILE 2L (16.2" Ø

x 3/8" THICK)

17.5" 7.2'

17.5" 8.2'

17.5" 6.8'

17.5" 7.6'

17.5" 8.8'

17.0" 5.2'

17.0" 6.9'

17.5" 10.9'

17.5" 10.9'

17.0" 7.5'

16.0" 10.9'

16.0" 11.2'

17.5" 10.4'

17.5" 11.7'

21.0" 11.7'

13.5" 12.2'

14.0" 12.6'

21.0" 11.1'

19.0" 11.1'

17.5" 8.2'

17.5" 7.6'

DOCK

CONNECTION

TRANSITION PLATE (TYP)

TRANSITION PLATE

TRANSITION PLATE

24" CLEAT (TYP THIS SIDE)

24" CLEAT (TYP THIS SIDE)

12" CLEAT (TYP DOCKS C TO G)

DOCK HINGE (TYP)

DOCK HINGE (TYP)

DOCK HINGE (TYP)

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 1 General Layout

X.X" X.X'

Water depth is presented relative to MLLW based on Tide Station 9451600 SITKA, AK

FREEBOARD (INCHES)

DEPTH (FEET)

CLEAT

FACILITY GENERAL PLAN

1 ACCESS TRESTLE PILE BENT DESIGNATION

OFFSHORE INSHORE

0 5' 10'

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

Dock: Sitka Marine Facility Island: Baranof Ranger District: Sitka Inspection Date: April 11-12, 2021

M A

T C

H

LI

N E

M A

T C

H

LIN

E

NOTES:

1. FOR TRESTLE, GANGWAY, AND DOCK DETAILS, SEE DRAWINGS 2 THROUGH 7.

ACCESS TRESTLE GENERAL PLAN

OFFSHORE INSHORE

0 5' 10'

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

17' (TYP)

11'-10"

148'-3" ACCESS TRESTLE

GATE

5'-9"

23'-6"± 22'-6"± 21'-9"± 21'-1"±

19'-10"± 18'-6"±

16'-9"± 15'-9"±

14'±

123456789

WATERLINE (VARIES)

MUDLINE (VARIES)

PIN AND HANGER

9.5"x9.5" TIMBER CAP

3.5"x3.5" TIMBER RAIL POST

5.5"x1.5" TIMBER RAIL

3.5"x1.5"

TIMBER RAIL

5.5"x1.5" TIMBER RAIL

9"x1.75" TIMBER DECK PLANK

4"x9.5" TIMBER

STRINGER (TYP)

TIMBER PILE (TYP)

8.25"x2.75"

TIMBER CROSS

BRACE (TYP)

STRINGER

SPLICE (SEE

DWG 3, TYP)

GANGWAY

TIP EL. (UNKNOWN)

MASONRY

RETAINING

WALL

17' (TYP)

11'-10"

148'-3" ACCESS TRESTLE

GATE

5'-9"123456789

TIMBER PILE (BELOW, TYP) TIMBER PILE CAP (TYP) 4"x9.5" TIMBER STRINGERS (TYP) MASONRY RETAINING WALLSPLICE (TYP)PIN AND HANGER

GANGWAY

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 2 Access Trestle Layout

TRESTLE ELEVATION

1 PILE BENT DESIGNATION

OFFSHORE INSHORE

TRESTLE FRAMING PLAN

OFFSHORE INSHORE

0 5' 10'

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

0 5' 10'

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

Dock: Sitka Marine Facility Island: Baranof Ranger District: Sitka Inspection Date: April 11-12, 2021

NOTES:

1. DECK PLANKS, HANDRAILS AND TIMBER CROSS BRACES ARE NOT SHOWN FOR CLARITY..

9.5"x9.5" TIMBER CAP

3.5"x3.5" TIMBER RAIL POST

5.5"x1.5" TIMBER RAIL

3.5"x1.5" TIMBER RAIL

5.5"x1.5" TIMBER RAIL

9"x1.75" TIMBER DECK PLANK

4"x9.5" TIMBER STRINGER (TYP)

3'-2.5"

6'

6'-8.0"

3" Ø UTILITY

3'-3" ASPHALT SHINGLE MAT

TIMBER PILE

8.25"x2.75" TIMBER CROSS BRACE

3/4" Ø BOLT

3'

6' (VARIES)

6' (VARIES)

4"x9.5" TIMBER

SPLICE

4"x9.5" TIMBER

STRINGER (TYP)

9.5"x9.5" TIMBER

CAP BELOW

3" 1' 6" 1' 3"

9.5"x9.5" TIMBER CAP

4"x9.5" TIMBER

STRINGER

4"x9.5" TIMBER

SPLICE BEYOND

TIMBER PILE

3" 1' 6" 1' 3"

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 3 Access Trestle Sections and DetailsTRESTLE CROSS SECTION

LEFT RIGHT

TRESTLE SPLICE DETAIL - PLAN

0 1' 2'

SCALE: 1/2"=1'-0"

TRESTLE SPLICE DETAIL - ELEVATION

0 1' 2'

SCALE: 1/2"=1'-0"

Dock: Sitka Marine Facility Island: Baranof Ranger District: Sitka Inspection Date: April 11-12, 2021

SCALE: 3/8"=1'-0"

0' 1' 2' 4'

B

50' (GIRDER LENGTH)

C6x10.5 GIRDER 1.5" Ø HSS HANDRAIL POST (TYP)4' (TYP)

11.5"x1.75" TIMBER PLANK WITH ASPHALT SHINGLE MAT OVERLAY

L6x4x0.3125 FLOORBEAM (BELOW)FRP GRATING

1.5" Ø HSS HANDRAIL POST (TYP) PIN AND HANGER (TYP)

2" Ø HSS

L6x4x0.3125 FLOORBEAM

11.5"x1.75" TIMBER PLANK (TYP)

3'-1.25"

C6x10.5 GIRDER

7.75"

5'-8.00"

2'-0.25"

FRP GRATING

3'-1"

1.5"x3.5" TIMBER (TYP)

ASPHALT SHINGLE MAT

1'-2.00"

1'-3.50"

1.5" Ø HSS

0.75"x3.5" TIMBER RAILS 3.00"

0.75"

2.50"

ACCESS TRESTLEGANGWAY

6.00"

18"x3"x0.5" STEEL STRAP

1" Ø x 6" LONG PIN

HANGER 2.50"

6.50"

1.00"

1.00"

2.50"

ACCESS TRESTLEGANGWAY

18"x3"x0.5" STEEL STRAP

TIMBER STRINGER

TIMBER STRINGER

HANGER

1" Ø x 6" LONG PIN

18"x3"x0.5" STEEL STRAP

C6x10.5 GIRDER L6x4x0.3125 FLOORBEAM

2" Ø HSS HANDRAIL

PIN AND HANGER (TYP)

ACCESS TRESTLEGANGWAY

1.5" Ø HSSWALKING SURFACE (VARIES)

50' (GIRDER LENGTH)

1.5" Ø HSS

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 4 Gangway Sections and DetailsGANGWAY CROSS SECTION B-B

LEFT RIGHT

GANGWAY PLAN VIEW

OFFSHORE INSHORE

OFFSHORE INSHORE

PIN AND HANGER ELEVATION

GANGWAY CROSS SECTION A-A

0 1' 2' 3'

SCALE: 3/4"=1'-0"

OFFSHORE INSHORE

PIN AND HANGER PLAN

0 3" 6"

SCALE: 3"=1'-0"

0 3" 6"

SCALE: 3"=1'-0"

SCALE: 3/16"=1'-0"

0' 1' 2' 4' 6'

OFFSHORE INSHORE

NOTES:

1. TRESTLE RAIL NOT SHOWN FOR CLARITY.

NOTES:

1. FRP GRATING IS 1.5" SQUARE GRATING, 2" HIGH, 5/16" THICK.

0 2' 4'

SCALE: 1/4"=1'-0"

Dock: Sitka Marine Facility Island: Baranof Ranger District: Sitka Inspection Date: April 11-12, 2021

DOCK D HINGE

DOCK G HINGE DOCK C HINGE

7"x21" TIMBER STRINGER

5.5"x21" TIMBER STRINGER

5.5"x21" TIMBER STRINGER

DOCK B CONNECTION

30'-6" 10'

1'-6"

4'-4"

2'-3.5" 21' ((5) 5.5"x7.5" TIMBER STRINGERS @ 63" O.C.) 5'-3" 26'-3" ((6) 9"x7.5" TIMBER STRINGERS @ 63" O.C.) 5'-3" 5'-3" 3'-1.25"

5.5"x7.5" TIMBER STRINGER

DOCK F HINGE

7"x21" TIMBER STRINGER

FLOAT BILLET (TYP)

68'-10"

10'-3"

10'-3"

A

B

16.2" x 3/8" W.T. STEEL

PIPE PILE (TYP)

9"x7.5" TIMBER STRINGER

5.5"x7.5" TIMBER STRINGER

9.5"x2" TIMBER DECK PLANK

(3) 5.5"x7.5" TIMBER WALES

(3) 2.5"x9.5"

TIMBER WALES

11.5"x7.5" TIMBER CURB ON 11.5"x5.5" TIMBER CHOCKS (TYP)

(5) 5.5"x7.5" TIMBER STRINGERS @ 63" O.C. (TYP) (6) 9"x7.5" TIMBER STRINGERS @ 63" O.C. (TYP)

7"x21" TIMBER STRINGER

16.2" Ø x 3/8" STEEL PIPE

PILE (BEYOND, TYP)

68'-10"

DOCK D HINGE

(13) 5.5"x5.5" TIMBERS BELOW FLOATS @ 63" O.C. (TYP)DOCK B CONNECTION

(3) 2.5"x9.5" TIMBER WALES

DOCK C OR G HINGE

5.5"x21" TIMBER STRINGER

TIMBER STRINGER

(VARIES)

7"x21" TIMBER STRINGER

9.5"x2" TIMBER DECK PLANK

DOCK F HINGE

FLOAT BILLET

16.2" Ø x 3/8" STEEL PIPE PILE (BEYOND, TYP) 5.5"x5.5" TIMBER

30'-6"

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 5 Dock Sections and Details - 1 of 4

DOCK A - SECTION A-A

DOCK A - FRAMING PLAN

OFFSHORE INSHORE

0 4' 8'

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

0 4' 8'

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

Dock: Sitka Marine Facility Island: Baranof Ranger District: Sitka Inspection Date: April 11-12, 2021

DOCK A - SECTION B-B

LEFT RIGHT

0 4' 8'

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

OFFSHORE INSHORE

1. FLOAT BILLETS DIMENSION AND LOCATIONS ARE APPROXIMATE.

18" CLEAT (TYP

THIS FACE)

24" CLEAT (TYP THIS FACE)

5.5"x14" TIMBER WALES

2.5"x12" TIMBER WALE

3.5"x7" TIMBER STRINGER

DOCK A CONNECTION

24" CLEAT (TYP THIS FACE)

5.5"x14" TIMBER STRINGER

3"x14" TIMBER WALES 2.5"x12" TIMBER WALE

FLOAT BILLET

3"x14" TIMBER

STRINGER

(TYP)

24'-8"

32'-8"

1'-6"

6'-6"

4' (TYP)

A

B

5.5"x14" TIMBER STRINGER

3.5"x7" TIMBER STRINGER (TYP)

3"x14" TIMBER STRINGER @ 4' O.C. DOCK A CONNECTION

11.5"x2.5" TIMBER DECK PLANK

FLOAT BILLET

24'-8"

2.50" 2.50"

18" CLEAT 24" CLEAT

5.5"x14" TIMBER WALES

2.5"x12" TIMBER WALE

3.5"x7" TIMBER STRINGER (TYP)

3"x14" TIMBER STRINGER @ 4' O.C.

11.5"x2.5" TIMBER DECK PLANK

FLOAT BILLET

32'-8.00"

2.50" 2.50"

18" CLEAT24" CLEAT 24" CLEAT

3"x14" TIMBER WALES

2.5"x12" TIMBER WALE

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 6 Dock Sections and Details - 2 of 4

DOCK B - SECTION A-A

DOCK B - FRAMING PLAN

OFFSHORE INSHORE

0 2' 4'

SCALE: 1/4"=1'-0"

0 2' 4'

SCALE: 1/4"=1'-0"

Dock: Sitka Marine Facility Island: Baranof Ranger District: Sitka Inspection Date: April 11-12, 2021

OFFSHORE INSHORE

DOCK B - SECTION B-B

0 2' 4'

SCALE: 1/4"=1'-0" LEFT RIGHT

1. FLOAT BILLETS DIMENSION AND LOCATIONS ARE APPROXIMATE.

HINGE TO DOCK A

1.5"x9.5" TIMBER WALE

(EACH SIDE)

12" CLEAT (TYP)

3"x16" TIMBER

(TYP)

3.5"x5.5" TIMBER

STRINGER

5.5"x5.5" TIMBER STRINGER

(EACH SIDE)

14'

6'

FLOAT BILLET

HINGE TO DOCK A 3"x16" TIMBER

(EACH END)

5.5"x1.5" TIMBER DECK PLANKTIMBER

STRINGER

12" CLEAT (TYP)

5.5"x2" TIMBER

14'

17.5" ±

7.5"

FLOAT BILLET

5.5"x1.5" TIMBER

DECK PLANK

6'

FLOAT BILLET

5.5"x2" TIMBER (TYP) 1.5"x9.5" TIMBER WALES

(EACH SIDE)

5.5"x5.5" TIMBER STRINGER (EACH SIDE)

12" CLEAT (TYP)

3.5"x5.5" TIMBER STRINGER

17.5" ±

7.5"

FLOAT BILLET

HINGE TO DOCK A 5.5"x5.5" TIMBER

STRINGER

1.5"x9.5" TIMBER

WALE (TYP)

12" CLEAT (TYP)

HINGE TO DOCK E3"x16" TIMBER (TYP)

FLOAT BILLET

5.5"x5.5" TIMBER STRINGER

12.75" Ø x 3/8" STEEL PIPE PILE

PILE GUIDE

36'-2.50"

6'

3.5"x5.5" TIMBER

STRINGER

3'-8.00"

FLOAT BILLET FLOAT BILLET

5.5"x1.5" TIMBER DECK PLANK

HINGE TO DOCK A 5.5"x5.5" TIMBER

1.5"x9.5" TIMBER

WALES

TIMBER STRINGER

12.75" Ø x 3/8" STEEL

PIPE PILE (BEYOND)

12" CLEAT (TYP) HINGE TO DOCK E

36'-2.50"

3"x16" TIMBER (TYP)

17.5" ±

11.0"

5.5"x1.5" TIMBER

DECK PLANK

6'

HINGE TO DOCK E FLOAT BILLET

5.5"x5.5" TIMBER (TYP)

1.5"x9.5" TIMBER WALES

(EACH SIDE, CUT AT HINGE)

5.5"x5.5" TIMBER STRINGER (EACH SIDE)

12.75" Ø x 3/8" STEEL PIPE PILE12" CLEAT (TYP)

3.5"x5.5" TIMBER STRINGER

PILE GUIDE

17.5" ±

11.0"

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 7 Dock Sections and Details - 3 of 4

DOCK C, F, G - FRAMING PLAN

0 2' 4'

SCALE: 1/4"=1'-0"

DOCK C, F, G - ELEVATION

0 2' 4'

SCALE: 1/4"=1'-0"

DOCK C, F, G - SECTION

0 2' 4'

SCALE: 1/4"=1'-0"

DOCK D - FRAMING PLAN

0 2' 4'

SCALE: 1/4"=1'-0"

DOCK D - ELEVATION

0 2' 4'

SCALE: 1/4"=1'-0"

DOCK D - SECTION

0 2' 4'

SCALE: 1/4"=1'-0"

NOTES:

1. FLOAT BILLETS DIMENSION AND LOCATIONS ARE APPROXIMATE.

2. WALES NOT SHOWN IN ELEVATION VIEWS FOR CLARITY.

Dock: Sitka Marine Facility Island: Baranof

HINGE TO DOCK D 1.5"x9.5" TIMBER WALE (TYP)

FLOAT BILLET

5.5"x5.5" TIMBER STRINGER (TYP)

12.75" Ø x 3/8"

STEEL PIPE PILE

PILE GUIDE

27'

FLOAT BILLET

6'

12" CLEAT (TYP)

3"x16" TIMBER (TYP)

FLOAT BILLET

5.5"x1.5" TIMBER DECK PLANK

HINGE TO DOCK D

TIMBER STRINGER 12" CLEAT (TYP)

3"x16" TIMBER (TYP)

12.75" Ø x 3/8" STEEL PIPE PILE

PILE GUIDE

17.5" ±

11.0"

FLOAT BILLET

27'

17.5" ±

11.0"

5.5"x1.5" TIMBER

DECK PLANK

6'

FLOAT BILLET

5.5"x5.5" TIMBER (TYP)

1.5"x9.5" TIMBER WALES

(CUT AT HINGE)

5.5"x5.5" TIMBER STRINGER (EACH SIDE)

12" CLEAT (TYP)

3.5"x5.5" TIMBER STRINGER

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 8 Dock Sections and Details - 4 of 4

DOCK E - FRAMING PLAN

0 2' 4'

SCALE: 1/4"=1'-0"

DOCK E - ELEVATION

0 2' 4'

SCALE: 1/4"=1'-0"

DOCK E - SECTION

0 2' 4'

SCALE: 1/4"=1'-0"

NOTES:

1. FLOAT BILLETS DIMENSION AND LOCATIONS ARE APPROXIMATE.

2. WALES NOT SHOWN IN ELEVATION VIEWS FOR CLARITY.

Dock: Sitka Marine Facility Island: Baranof

12345678

BUSH GROWING FROM WALL (BOTH SIDES)

DETERIORATED ACCESS GATESPLIT AT BOTTOM OF

UPPER CROSS BRACE

SPLIT AT TOP OF LOWER CROSS BRACE

SPLIT AT TOP OF LOWER

CROSS BRACE

SPLIT AT TOP OF LOWER

CROSS BRACE

CORROSION OF ALL BOTTOM CROSS BRACING CONNECTION HARDWARE

2"Ø HOLE IN DECK PLANK

DOCK A

DOCK B

DOCK C

DOCK D

DOCK F

PIN AND HANGER IN CRITICAL CONDITION WITH 1/4"

REMAINING STEEL AND NO REDUNDANT SAFETY SYSTEM

(BOTH SIDES)

WALLOWING OF DOCK CONNECTION WITH 1/4" SECTION LOSS

WALLOWING OF DOCK CONNECTION WITH 1/4" SECTION LOSSDOCK FREEBOARD VARIES FROM 21" AT

INSHORE END TO 13.5 IN. AT OFFSHORE END

50% SECTION LOSS OF HINGE PIN

MODERATE ROT OF TIMBER PLANKS

CORROSION HOLE IN FLOOR BEAM WEB

CORROSION OF GANGWAY HANDRAILS AND BRACINGLOOSE UHMW

ADD SAFETY LADDER

ADD SAFETY LADDER

CORROSION OF LOWER CROSS BRACING HARDWARE (BOTH SIDES)

MISSING TIRE (TYP)

MISSING TIRE

15% OF DECK WITH MODERATE ROT1/4" DEEP ABRASION OF DECK

FROM TRANSITION PLATES

6"Ø x 2" HOLE IN FLOAT

MINOR ABRASION AND IMPACT DAMAGE

LOOSE 12" CLEAT

SEVERE ROT OF

LOWER TIMBER

STRINGERS

END SPLIT IN UPPER STRINGER

SEVERE ROT OF LOWER

TIMBER STRINGER

END SPLIT IN UPPER STRINGER

DOCK E

LOOSE UPPER WALE

MISSING TRANSITION PLATE CONNECTIONS

MISSING TRANSITION PLATE U BOLT

AND SHARP EDGE

MINOR ABRASION OF CURB

SPLIT CURB

MINOR ABRASION OF TOP WALE

MARINE GROWTH ON SAFETY LADDER

NO CAP ON PILE

NO CAP ON PILE

LOOSE CONDUIT

WITH ABRASION

MINOR CORROSION OF FLOOR BEAMS (TYP)

CORRODED CONDUIT ATTACHED TO GANGWAYBROKEN INTERMEDIATE RAIL

4" GAP WITHOUT TRANSITION PLATE

4" GAP WITHOUT TRANSITION PLATE

ABANDONED JUNCTION BOX

SPLIT UPPER WALE

WITH MINOR

ABRASION

DISCONNECTED DECK PLANK

DOCK G

END SPLIT IN UPPER STRINGER

DOCK G WAS DISCONNECTED

AND MOORED UNDER THE

GANGWAY AT THE TIME OF

INSPECTION

UNITED STATES DEPARTMENT OF AGRICULTURE

REMOTE DOCK AND MARINE FACILITY INSPECTIONS

Southeast Alaska/Tongass National Forest Contract No. 12010920F0013

DWG 9 Deficiency Plan

CLEAT

FACILITY DEFICIENCY PLAN

1 ACCESS TRESTLE PILE BENT DESIGNATION

OFFSHORE INSHORE

0 5' 10'

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

Dock: Sitka Marine Facility Island: Baranof Ranger District: Sitka Inspection Date: April 11-12, 2021

M A

T C

H

LI

N E

M A

T C

H

LIN

E

TYPICAL DEFICIENCIES:

1. THERE IS NO FENDER SYSTEM ON THE DOCK EXCEPT AT DOCK B.

2. PILES HAVE TYPICAL MINOR CORROSION BELOW THE WATERLINE.

3. TRESTLE DECK PLANKS TYPICALLY HAVE MINOR CHECKS AND SPLITS.

4. TRESTLE HANDRAIL IS TYPICALLY WEATHERED AND HAS MOSS GROWTH.

5. GANGWAY INTERMEDIATE RAILS AND KICKBOARD ARE TYPICALLY HEAVILY WEATHERED.

ACCESS TRESTLE DEFICIENCY PLAN

OFFSHORE INSHORE

0 5' 10'

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

C-1

Appendix C Photos

C-2

Photo 1: General view of the facility.

Photo 2: General view of the access trestle.

C-3

Photo 3: General view of the access trestle topside.

Photo 4: Gate at entrance to access trestle.

C-4

Photo 5: General view of access trestle handrail.

Photo 6: General view of access trestle walking surface. Note asphalt shingle mat.

C-5

Photo 7: Typical minor split in access trestle deck plank.

Photo 8: Hole in access trestle deck.

C-6

Photo 9: General view of access trestle underside.

Photo 10: Typical pile bent configuration. Note bolts for stringer splice.

C-7

Photo 11: Access trestle connection to masonry wall. Note bush growing out of wall.

Photo 12: General view of access trestle piles and bracing configuration.

C-8

Photo 13: Split in access trestle pile cap.

Photo 14: Typical condition of access trestle middle and top level cross brace connection.

C-9

Photo 15: Typical condition of access trestle lower corroded cross bracing connection.

Photo 16: Split access trestle cross brace.

C-10

Photo 17: Typical access trestle timber pile condition in tidal zone.

Photo 18: Typical access trestle timber pile condition underwater.

C-11

Photo 19: Typical condition of pin and hanger. Note wallowed bottom hole.

Photo 20: General view of pin and hanger connection.

C-12

Photo 21: General view of pin and hanger connection.

Photo 22: General view of gangway.

C-13

Photo 23: General view of gangway from access trestle.

Photo 24: General view of gangway from dock.

C-14

Photo 25: Broken gangway intermediate rail.

Photo 26: Missing U bolt and sharp edge in gangway top transition plate.

C-15

Photo 27: General view of gangway underside. Note moderately rotted planks.

Photo 28: Hole in web of gangway floorbeam.

C-16

Photo 29: Detail of gangway floorbeam to girder connection.

Photo 30: Detail of gangway landing skid. Note loose UHMW wear pad behind.

C-17

Photo 31: Corrosion of conduit on right side of gangway.

Photo 32: Utility hanging in water with minor abrasion.

C-18

Photo 33: Junction box connected to gangway.

Photo 34: General view of dock topside.

C-19

Photo 35: General view of Dock A.

Photo 36: General view of Dock B.

C-20

Photo 37: General view of Dock C. Note four kayaks on racks.

Photo 38: General view of Dock D. Note Dock G moored below gangway.

C-21

Photo 39: General view of Dock E.

Photo 40: General view of Dock F. Note safety ladder.

C-22

Photo 41: Safety ladder on Dock F. Note marine growth below water.

Photo 42: Typical view of cleat and curb on Dock A.

C-23

Photo 43: Split curb on Dock A.

Photo 44: Typical cleat bolted to deck of Dock A.

C-24

Photo 45: General view of Dock A deck. Note deck plank with moderate rot.

Photo 46: Loose Dock A deck plank and isolated moss growth.

C-25

Photo 47: Abrasion of Dock A deck planks from Dock B transition plates.

Photo 48: Abrasion of Dock A deck planks from Dock B transition plates.

C-26

Photo 49: Connection between Dock A and Dock B. Note 1/4” of section loss.

Photo 50: Typical hinge between all docks except Dock A to Dock B (Plan View).

C-27

Photo 51: Typical hinge between all docks except Dock A to Dock B (Elevation View).

Photo 52: Typical hinge between all docks except Dock A to Dock B (Section View).

C-28

Photo 53: General view of dock framing.

Photo 54: Typical split wale with minor abrasion at top.

C-29

Photo 55: Split in end of Dock E stringer.

Photo 56: Typical timber condition below water.

C-30

Photo 57: Severe rot of Dock D timber stringer below floatation billets.

Photo 58: Typical condition of timber and floatation billets above water.

C-31

Photo 59: Hole in float at Dock A.

Photo 60: General view of fender system. Note missing tire and uneven dock.

C-32

Photo 61: General view of dock piles

Photo 62: Dock Pile 1L – Missing pile cap (same at Dock Pile 1R).

C-33

Photo 63: Typical dock pile guide for Dock Bent 1.

Photo 64: Typical dock pile guide for Dock Bents 2 and 3.

C-34

Photo 65: Typical condition of dock pile below water.

D-1

Appendix D Critical Finding Email

D-2

D-3

D-4