MMM Group Limited. Eagle Island Pier Inspection Report. Prepared for: District of West Vancouver. July

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1 MMM Group Limited Eagle Island Pier Inspection Report Prepared for: District of West Vancouver July

2 STANDARD LIMITATIONS This report was prepared by MMM Group (MMM) for the account of the District of West Vancouver (the Client). The disclosure of any information contained in this report is the sole responsibility of the Client. The material in this report reflects MMM's best judgment in light of the information available to it at the time of preparation. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. MMM accepts no responsibility for damages, if any, suffered by a third party as a result of decisions made or actions based on this report.

3 EXECUTIVE SUMMARY A visual inspection of the Eagle Island pier structures by MMM Group engineers on June was undertaken at both high and low tide. This report summarizes the findings of this inspection. The structures inspected included: the mainland pier (pier walkway, gangway and floating docks), service pier (gangway and floating dock) and island pier (gangway and multiple floating docks) as well as three abutments. The mainland pier structure was found to be generally in good condition with no major repairs anticipated in the near future. The service pier gangway and dock were both found to be in poor condition and at the end of their service life. Full replacement is recommended. Due to the unevenness of the dock, closure is recommended until replacement. The island pier gangway is in a serviceable condition with replacement of some decking members required and future painting of the truss or replacement recommended. The floating docks are water-logged with isolated floatation issues that should be addressed in the short term. On-going replacement of floatation devices is anticipated until the floating docks are fully replaced. No immediate safety risks were identified, however given the age and type of structures and the environment, regular maintenance and repairs will be required on these structures to ensure safety in-service. Inspection Report Eagle Island Pier MMM Group July

4 Table of Contents 1. INSPECTION AND STRUCTURE OVERVIEW OBSERVATIONS AND RECOMMENDATIONS Pier Substructures Mainland Pier Superstructure Gangways Mainland Pier Gangway Island Pier Gangway Floating Docks Mainland Pier Floating Docks Island Side Floating Docks Service Dock (Mainland Side) Utilities and Signage SUMMARY OF RECOMMENDATIONS Appendix Appendix A Field Inspection Sheet and Pier Sketches Appendix B Inventory Photographic Records Appendix C Defect Photographic Record Appendix D Ocean Tech Repairs Quote April 3, 2013 Inspection Report Eagle Island Pier 1 MMM Group July

5 1. INSPECTION AND STRUCTURE OVERVIEW The Eagle Island Piers consist of three structures which facilitate vessel access from the mainland to Eagle Island. The mainland structure consists of a 9-span timber pier with access to a series of floating docks (3) via an aluminum truss gangway. Adjacent to the mainland structure is a service pier consisting of a steel truss gangway providing access to a floating dock. The Eagle Island structure consists of a steel truss gangway providing access to a series of floating docks (10). The figure below provides a schematic of the pier arrangement and location. Use of the structures is permitted only for Eagle Island residents. This report summarizes the condition of the pier elements, identifies remedial work required, and provides recommendations for future works on the structures. Service Pier Inspection Report Eagle Island Pier 2 MMM Group July

6 2. OBSERVATIONS AND RECOMMENDATIONS MMM Group completed a visual inspection of the Eagle Island Piers on June 6, 2013 at low tide, conducting a comprehensive assessment of all pier elements above the ground and water elevations at the time of inspection. A visual inspection was also conducted at high tide to assess the performance of the floating docks. It is understood that a detailed assessment of necessary repairs was completed by Ocean Tech Constructors Incorporated and submitted to the District dated April 3 rd, Further reference to this document is made in Section 3, recommendations. Non-destructive investigative methods such as hammer sounding were used to identify areas of rot in the timber elements. The condition rating system and inspection form used to document the inspection results is consistent with previous bridge, reservoir, and structure inspections conducted for the District and is included in Appendix A. An inventory photographic record is included in Appendix B to document the general condition of the structures at the time of inspection. All defects identified from the inspection are detailed herein and in the defect photographic record (Appendix C). The current inspection found the mainland pier to be in good condition with minimal maintenance or repair work required. The service and island pier structures were found to be in fair condition with recommended remedial works as outlined herein. The service pier and associated ramp was found to be in a poor condition with full replacement recommended. No immediate safety issues were identified. 2.1 Pier Substructures Pier Substructures refers to the three abutments and the mainland pier foundation piles and pier caps. The pier abutments at both the mainland and island piers were found to be in good condition with no sign of deficiencies. The service pier is of older stonework construction but otherwise in a serviceable condition. A majority of the pier footings at the mainland pier could not be inspected due to build-up of crustaceans and molluscs. By visual inspection the pier piles were deemed to be well treated and in good condition, thus it is not required to conduct further diagnostic testing such as coring to determine the presence of rot at this time. One set of piles supporting spans 4 and 5 were found to be noticeably leaning, however given that it appeared correctly positioned under the pile cap and was still firmly affixed to bracing, it is suspected that these piles may have been installed at this angle, thus monitoring only is recommended. Inspection Report Eagle Island Pier 3 MMM Group July

7 Pier Piles Leaning at Spans 4 and 5 Typical Pier Substructure Arrangement 2.2 Mainland Pier Superstructure The timber decking at the Mainland Pier was in good condition with no defects noted or evidence of rot. The timber railings were also found to be in good condition with no evidence of rot or damage. The supporting stringers are well treated and at minimal risk of deterioration due to rot or marine borer infestation. The clearance during the high tide site visit was approximately one metre, thus it is expected that inundation during king high tides will occur. Raising the Pier elevation should be considered if it were ever to be replaced. Mainland Pier at High Tide (approx. 14 Ft.) Pier Railing and Lighting Inspection Report Eagle Island Pier 4 MMM Group July

8 2.3 Gangways Mainland Pier Gangway A number of the timber treads installed on the gangway from the mainland pier to the floating docks are worn or loose and need to be refastened or replaced as shown in the figure below. Fasteners to secure the expanded metal mesh on the gangway were noted to be loose or missing at multiple locations. At one location in particular at the bottom of the gangway shown below the metal mesh is lifting and could pose a potential tripping hazard. Worn and Displaced Timber Tread Tripping Hazard on Mainland Gangway Wear in the timber edge planks on the floating docks has caused the mooring posts to come loose but remain secure and should be monitored. The timber railings on the pier structure were found to be in good condition with no evidence of rot Island Pier Gangway The protective coating on the steel gangway truss it s past is service life. The steel truss should be repaired and a new protective coating applied. Rot was found in the timber decking, it was noted that some of the decking had been recently replaced, however some existing planks including edge planks with extensive rot remain as shown below. Inspection Report Eagle Island Pier 5 MMM Group July

9 Rot in the Island Pier Gangway Edge Planks Service Pier Gangway Extensive rot of the timber decking on the steel truss gangway was found for the entire deck area. Extensive Rot in the Timber Decking on the Steel Truss Gangway at the Service Pier The age of the steel gangway truss is comparable to that of the gangway at the island pier, which similarly requires a new protective coating as the current coating is in poor condition and no longer effective. Quotes for painting and re-decking should be compared with the cost of replacing each gangway with a new aluminum truss. 2.4 Floating Docks Mainland Pier Floating Docks Wear in the timber edge planks on the floating docks has caused the mooring posts to come loose but remain secure and should be monitored. Inspection Report Eagle Island Pier 6 MMM Group July

10 2.4.2 Island Side Floating Docks Inspection of the floating docks at high tide indicated that the integrity of the floating docks at the Island Pier is poor with numerous deficiencies. The figure below shows the condition of the dock at high tide whereby portions of the dock do not have sufficient buoyancy to remain level. The floating dock, B1 (see sketch in Appendix A), supporting the steel truss gangway is submerged in the south-west corner, which supports an electrical power outlet. As such the outlet is very close to the water elevation. The south-east corner of B2 and southwest corner of B3 were also found to be dipping locally. Uneven Floating Dock Completely Submerged Section at Island Pier The pontoons supporting the floating docks consist of rubber tires foam filled with timber blocking. These are in poor condition and fails to provide the buoyancy required at certain locations. As shown in the figure below, at other locations the floatation (tires) were no longer anchored to the float frame or missing altogether. Tire Floatation Not Anchored to Timber Frame Wear and Corrosion to Float Connecting Bolts Inspection Report Eagle Island Pier 7 MMM Group July

11 Options for remediating the floatation are: replace individual tires with new floatation devices, expanded polystyrene foam [EPS] blocks or polyethylene floatation pontoons (plastic air-filled circular drums) being the cheapest and most common options, or; replace the entire float. Other elements of the floating docks that require replacement include the float connecting pins which have worn and corroded. The edge/fascia boards display damage consistence with impact by large vessels or the barges. These boards should be replaced and PVC dock bumpers should be installed full height of the float to prevent future damage. Due to the aforementioned flotation issues, the west end of the floating dock was submerged at high tide causing extensive rot in the area. The timber bearing surface for the gangway roller support is in very poor condition and needs to be replaced (see defect photo D13) Service Dock (Mainland Side) Inspection of the Service Pier at high tide indicated poor floatation of the dock and suggests the floatation devices are compromised, most likely due to the encrustation and saturation reducing buoyancy. Warning signage is present to warn users about hazards of the uneven floating dock. The Dock is anchored by a single pile. Service Dock at Low Tide Service Dock at High Tide It is possible to correct the floatation of the pier by installing new floatation devices, as described above, however given the overall condition of the float complete replacement is recommended. A quote has been provided for a new timber float with EPS floatation. A concrete float with EPS floatation built-in is recommended as it is far more durable and requires minimal maintenance. Inspection Report Eagle Island Pier 8 MMM Group July

12 2.5 Utilities and Signage Signage for a safe load limit for the aluminum gangway truss at the Mainland Pier is present but illegible. No signage indicating load limits were present on the steel gangway trusses or otherwise on the pier structures. At the island pier a large vessel is moored and directly attached to the steel gangway truss, which may cause distress to the truss and the connections at the abutment. The owner of the vessel should be notified to remove the vessel and it is recommended to install signage to indicate that no mooring is permitted. Vessel Mooring to Steel Gangway Truss Usage Sign Requires Cleaning It is noted that charging stations were installed to allow pier users to charge batteries of the small commuter boats which utilize electric motors for propulsion in order to reduce the impact on the environment from gas motors. The electrical conduit is not secured properly to the floating dock and currently poses a tripping hazard at dock B9 (see sketch in Appendix A). Poorly Secured Electrical Conduit Posing Tripping Hazard at Dock B9 Inspection Report Eagle Island Pier 9 MMM Group July

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14 APPENDIX A Field Inspection Sheet and Pier Sketches

15 District or Municipality Name Eagle Island Pier Infrastructure Management System FIELD INSPECTION SHEET ID No PIER Current Inspection Inspectors Firm Date Principal X Monitoring B. Counihan / R. Coughlin MMM Group 6/6/2013 Last Principal Inspection N/A Last Monitoring Inspection N/A Structure Type: Timber Pier, Alum./Steel Ramp Overall width: Varies - 26" Minimum Orientation: East - West Deck area: ML = 162 m 2 Description: Three structures - Island Pier (IS) IS = 164 m 2 Mainland Pier (ML), and Service Pier (SV) SV = 31 m 2 Feature Supported: Eagle Island Accessway Feature Crossed: Eagle Harbour No of Spans: ML = 10, IS = 1, SV = Horizontal 1.2 Vertical 1.3 Embankment 1.4 Drainage 1.5 Guardrail alignment alignment 1 Approach R(%) R(%) R(%) R(%) R(%) ML IS 1.6 Sidewalk 1.7 Median X X X X X X X X X X X X X X X X R(%) R(%) 1.8 Protection Works ML IS 1.9 Wearing surface 1.10 Slope protection 1.11 Approach barriers 1.12 Signage X X X X X X X X X X 1.13 Utilities 2 Abutments 2.1 Bearing seat 2.2 Fender wall 2.3 Front wall 2.4 Wing walls 2.5 Piles 2.6 Stability 2.7 Retaining walls 2.8 Drainage ML IS 3 Piers ML X X E X X E X X X X E X X E X X 3.1 Piles 3.2 Cap/corbel 3.3 Foundation 3.4 Stability 3.5 Protection works 20 E E E E X 3.6 Armour / Crash wall 4 Span Related Items ML S1 - S9 ML Gangway IS Gangway SV Gangway 4.1 Decking 4.2 Wearing surface rideability 4.3 Underside of deck slab 4.4 Exterior long. members 4.5 Interior long. members 4.6 Transv. members 4.7 Diagonal members 100 X X E X X X X 5 2 X X E X E E X 4.8 Member Coating X X E X X E X X E X X E 100 ML S1 - S9 ML Gangway IS Gangway SV Gangway 4.9 Landing 4.10 Sidewalks 4.11 Median 4.12 Bullrail 4.13 Parapets / 4.14 Traffic barrier 4.15 Signage 4.16 Utilities X Boards X X X Railings 2 X E E E X X X E X 100 X 100 X X X E X X X X E X E X 5 Floating Dock ML (A1 - A3) IS (B1) IS (B2 - B6) IS (B7 - B10) SV (C1) 5.1 Wearing Surface 5.2 Mooring Posts 5.3 Floatation 5.4 Edge Boards E E 25 X 100 X E X 100 E X E Float Piles 50 X X 5.6 Joints 6 Channel 6.1 Alignment 6.2 Bank stability 6.3 Waterway 7. Measure-ments See Sketches At Bridge Downstream Upstream E E E E E E E E E

16 REMEDIAL WORK ACTIVITY LIST Item Loc. Activity Description Qty Unit U Make Safe Comments Bridge No. 3.1 All Crustaceans/Molloscs - Remove 50 m 2 4 Remove from pile bases D1, D2, I ML (S4/5) Pier Displacement - Monitor 1 No M Pier slightly displaced east D1 4.1 ML (S1-S9) Expanded Metal Mesh - Install 25 m 2 M Slippery in wet and cold/icy conditions I3 4.1 ML Gangway Tread - Replace 5 No 2 1"x2"x 17" worn/loose (48 in total) D3 4.1 ML Gangway Fasteners - Install 10 No To end of hinged ramp 4.1 ML Gangway Fasteners - Expanded Metal Mesh 1 No 1 Y Metal mesh lifting at base of ramp D7 4.1 SV Gangway Decking - Replace 17 m 2 M Extensive rot in timber decking D26-D IS Gangway Decking - Replace 20 m 2 2 Edge planks require replacement D17, D IS Gangway Coating - Field Prep and Recoat 1 No M Protective coating deteriorated D SV Gangway Coating - Field Prep and Recoat 1 No M Protective coating deteriorated D IS Gangway Gangway landing - Replace 1 No 2 Plywood 5400 x 1220 mm D IS Gangway Gangway landing - Replace 1 No M Plywood 4.13 ML (A1) Fasteners - To Railing 1 No 2 To bracing D ML Gangway Signage - Clean 2 No 1 Safe load sign illegible D IS Gangway Install signage - No mooring 1 No 1 No mooring permitted D IS Docks Electrical Conduit - Secure 1 No 1 Y Poorly tied to bays and trip hazard D21, D ML / IS Mooring Post - Secure 20 No M Worn edge boards causing movement I IS (B2-B3) Pontoon - Replace 5 No 2 Timber elements are water logged D23, D IS (B1) Pontoon - Replace 1 No 1 B1 deck is submerged and water is D20, D26 encroching on electrical conduit 5.3 SV (C1) Pontoon - Replace 1 No M Timber elements are water logged 5.4 IS (B7-B10) Edge Boards - Replace 25 m 1 Impact damage to 2" x 8" boards D17, D IS (B7-B10) Piles - Clean 5 m 2 R Remove crustaceans/molloscs D All Docks Pile Caps - Install 6 No 2 Install caps at piles to prevent rot D5, D16 IS Gangway Boat mooring on truss - Remove 1 No 1 Boat tied to end of ramp D IS (B1-B2) Connection Rod - Replace 2 No 3 Galvanized rod 10 dia x 2500 lg existing D14 but can replace with bolts Rep Photo Mon freq Comments: Clearance width on island ramp is 26" (1170 mm), 2009 replacement design completed ($450,000) Rating Structural integrity Functionality-secondary to Structural Integrity Maintenance priority and urgency of repair Urgency U R and safety of user Does it perform as originally designed? Monitor M E No defects New condition no defects Not applicable Routine R 4 G Min relevancy Acceptable, functioning as intended but maintenance Not required before next principle inspection 5yrs or > 4 required 3 F Functioning as intended. Minor to more extensive Preventative maintenance required within < 3 yrs 3 rehab required to upgrade to new specified period 2 P Unacceptable, not functioning as intended Work required within specified time period < 2 yrs 2 Major rehabilitation required 1 V Max relevancy Immediate action. Collapse imminent Danger to users immediate repair required ASAP 1 N Not accessible; X Not applicable, % - percentage of element representing rating R NA North Abutment, BA Both Abutments, AL All supports, AS All Spans, S1 Span 1, P1 Pier 1, AP All Piers, P1-3, Piers 1 to 3

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19 APPENDIX B Inventory Photographic Record

20 Eagle Island Pier Inventory Photographic Record (Mainland Pier) June 6, 2013 I1 South Eleva on I2 North Eleva on I3 Pier Deck Looking East I4 Pier Deck Looking South I5 Approach Looking West I6 Gangway and Floa ng Dock I7 Eagle Harbour Looking North I8 Eagle Harbour Looking South

21 Eagle Island Pier Inventory Photographic Record (Mainland Pier) June 6, 2013 I9 Underside of Pier Deck I10 Underside of Gangway Deck I11 Abutment I12 Typical Pier I13 Typical Pier Cap I14 Typical Railing I15 Gangway Deck I16 Floa ng Dock Deck

22 Eagle Island Pier Inventory Photographic Record (Mainland Pier) June 6, 2013 I17 Pier at Gangway Joint I18 Gangway Support I19 Gangway Rollers at Floa ng Dock I20 Floa ng Dock Joint I21 Typical Pontoon I22 Pile Guides at Floa ng Dock I23 Signage at Abutment I24 Typical Ligh ng

23 Eagle Island Pier Inventory Photographic Record (Island Pier) June 6, 2013 I25 North Eleva on I26 South Eleva on I27 Island Pier Looking West I28 Island Pier Looking East I29 Guide Piles at Floa ng Dock I30 Floa ng Dock Looking West

24 Eagle Island Pier Inventory Photographic Record (Island Pier) June 6, 2013 I31 Floa ng Dock Looking North I32 Floa ng Dock Looking South I33 Steel Gangway Truss I34 Gangway Deck I35 Floa ng Dock at Gangway I36 Typical Pontoon I37 Typical Mooring Post I38 Floa ng Dock Joint

25 Eagle Island Pier Inventory Photographic Record (Service Pier) June 6, 2013 I39 North Eleva on I40 Floa ng Service Dock at High Tide I41 Gangway Deck I42 Underside of Gangway Deck I43 Stone Abutment I44 Steel Gangway Truss I45 Hazard Signage

26 APPENDIX C Defect Photographic Record

27 Eagle Island Pier Defect Photographic Record June 6, 2013 D1 Displacement at Pier D2 Mussels at Pier Foo ngs D3 Gangway Running Boards Loose D4 Railing Bracing Detached D5 No Caps on Piles D6 Safe Load on Gangway Illegible D7 Expanded Metal Mesh Loose

28 Eagle Island Pier Defect Photographic Record June 6, 2013 D8 Plywood at Edge of Gangway Detached D9 Damaged Edge Boards D10 Damaged Edge Boards D11 Protec ve Coa ng in Poor Condi on D12 Vessel Moored to Gangway Truss D13 Rot in Gangway Sliding Base D14 Rod Floa ng Dock Connec on Corroded D15 Rot in Timber Decking

29 Eagle Island Pier Defect Photographic Record June 6, 2013 D16 No Pile Cap D17 Rot in Gangway Edge Planks D18 Rot in Gangway Edge Planks D19 Water Level Close to Power Source D20 Deck Submerged at High Tide D21 Electrical Conduit Poorly Secured D22 Poorly Secured Conduit Causing Tripping Hazard D23 Connec on of Pontoon to Deck Damaged

30 Eagle Island Pier Defect Photographic Record June 6, 2013 D24 Floa ng Dock Uneven D25 Crustaceans/Molluscs at Dock Guide Piles D26 Corner of Floa ng Dock Submerged D27 Extensive Rot in Gangway Deck D29 Vegeta on on Deck D28 Extensive Rot in Gangway Deck

31 APPENDIX D Ocean Tech Repairs Quote

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