Integrated Planning and Consulting Ltd. INSPECTION REPORT SNUG COVE WHARVES BOWEN ISLAND, BC

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1 Integrated Planning and Consulting Ltd. INSPECTION REPORT SNUG COVE WHARVES BOWEN ISLAND, BC PREPARED FOR: PROJECT # AUGUST

2 TEL: FAX: Panorama Drive North Vancouver, BC V7G 2A4

3 Integrated Planning and Consulting Ltd Panorama Drive North Vancouver, B.C. V7G 2A4 INSPECTION REPORT SNUG COVE WHARVES BOWEN ISLAND, BC Project # August, 2013

4 Integrated Planning and Consulting Ltd Panorama Drive North Vancouver, B.C. V7G 2A4 Attention: Keith Wahlstrom, P.Eng. Bowen Island Municipality 597 Artisan Lane, Bowen Island BC V0N 1G0 Telephone (604) September 24, 2013 Project Number: Re: Inspection of the Snug Cove Wharves Dear Sir: Please find enclosed an inspection report of the municipal wharves located in Snug Cove, adjacent the BC Ferries landing on Bowen Island. The scope of work of our proposal was to conduct a site visit and provide a visual inspection of the wharves to determine the general condition for planning and cost evaluation purposes. Based on above water visual inspection, the piers are in serviceable condition subject to minor repairs outlined herein. Due to the old age of the wharves, there are many items requiring coring to better assess their condition. Sincerely, Ted Appleton, P.Eng President Integrated Planning and Consulting Ltd Enclosed: Inspection Report 1 P a g e

5 1.0 INTRODUCTION Integrated Planning and Consulting Ltd. (IPc) was retained by Bowen Island Municipality (BIM) to provide assistance planning the future use of the Snug Cove Municipal Wharves. IPc proposed visiting the site to provide a partial visual inspection of the wharves. The purpose of the inspection was to get an idea of the wharves current condition; to provide background information for developing cost-efficient strategies for future use. The wharves are located on each side of the BC Ferry landing, known as the North Pier and South Pier. Refer to Figure 1, below, for the layout of the wharves. Figure 1. North and South Piers (Westmar Drawing) The inspection was conducted between August 8 9, Visual inspection was completed topside the wharves on deck, under the wharves on beach and by skiff to access over water conditions. 2 P a g e

6 2.0 REFERENCES Worley Parsons Ltd. (formerly Westmar Consultants Inc.) conducted a detailed inspection of the wharves in November 2001 and re-visited the North Pier in October BIM created a wharf rehabilitation project in September 2004 to repair items recommended by Westmar. 3.0 DATA COLLECTION The inspection of the wharves was conducted above water without hand drilling/coring or ultrasonic testing. The purpose of the inspection was to determine the general condition of the wharves by visual inspection. The following tables provides the data collected during the inspection. The North Pier is located on the north side of the BC Ferry landing, refer to Figure 1. Table 1. North Pier (Main Wharf) Bent Location Item Description of Damages Recommended Course of Action 4B Bearing Pile Pile split. Banding. 6D Bearing Pile Oversized repair band fell off. Replace banding. 7A Bearing Pile Undersized bearing pile. Coring. 7B Bearing Pile Pile splitting. Refer to Figure 2. Coring. 7C Bearing Pile Expansion at top of pile currently Coring. repaired with banding. 9C Bearing Pile Drift log wedged between pile and Remove log. cross brace. May cause mechanical damage. Recommend winching or towing out with vessel. 11F Bearing Pile Pile split. Banding. 14L Bearing Pile Pile split. Banding. 15H Bearing Pile Pile split. Banding. 15J Bearing Pile Pile split. Banding. 16J Bearing Pile Pile split. Banding. 16K Bearing Pile Pile split. Banding. 18H Bearing Pile Pile split. Banding. 21I Bearing Pile Pile split. Banding. 11 EEBr Batter Pile Fungal damage on end of pile. Coring Batter Piles Recommend bolting batter piles to Bolting. EEBr bearing pile at intersects. 5A 5D Cross Brace Bolt broken through bottom of Replace bolt. bearing pile 5D 6A 6D Cross Brace Fungal, bankia or limnoria damage. Coring. 7A -7D Cross Brace Fungal, bankia or limnoria damage. Coring. 3 P a g e

7 Bent Location Item Description of Damages Recommended Course of Action 8A -8D Cross Brace Fungal, bankia or limnoria damage. Coring. Refer to Figure F-G Cap Fungal, bankia or limnoria damage. Coring. 6-7 D-C Stringer Mechanical damage from pin Coring. installation. 16J Corbel Mechanical damage from pin installation. Refer to Figure 4. Coring. 20E Safety Ladder Requires cleaning and inspection at low tide. Refer to Figure 5. Clean. The South Pier is located on the south side of the BC Ferry landing, refer to Figure 1. Table 2. South Pier (Float Wharf) Bent Location Item Description of Damages Recommended Course of Action 4A D1 Electrical Loose cables. Install cable clamps. 11A C1 Bearing Pile Pile split. Band. 12A A1 Bearing Pile Pile split. Band. 13A E1 Bearing Pile Tight chain between bearing pile Disconnect chain. and cut-off fender pile with undetermined purpose. 14A A1 Bearing Pile Pile split. Banding. 14A C1 Bearing Pile Pile split. Banding. 15A A1 Bearing Pile 10% mechanical damage. Refer to Coring. Figure 6. 6A C1 Cap Cap split. Coring. 13A D1 Stringer Mechanical damage from pin Coring. installation. Refer to Figure 7. 14A D1 Stringer Two stringers with mechanical Coring. damage from pin installation. Refer to Figure 8. 14A E1 Stringer Mechanical damage from pin Coring. installation. 12A A1 Cross Brace Cross brace disconnected & 50% Replace. CSL. Refer to Figure 9. 14A E1 Electrical Loose cables. Install cable clamps. 4 P a g e

8 4.0 DISCUSSION We conducted a visual inspection topside on deck and under the piers on beach and by skiff. No underwater inspection, coring or ultrasonic testing was carried out. Approximately 50% of the bearing piles were inspected at low tide, specifically targeting cross brace bolting and seabed areas. Many of the cross braces show signs of deterioration likely from marine decay and the cross brace at pile 12A A1 has broken off completely. The cross brace hardware appeared to be in good shape, with the exception of pile 5D with a broken bolt. The decking, guard and handrail are in good condition. This was expected since most were replaced in The stringers, caps and corbels appear to be in good condition as well, however, there is mechanical damage from original construction to approximately 5 stringers and 1 corbel that should be cored to assess their condition. It is recommended that a sample set of old stringers, caps and corbels be re-inspected with coring to verify their condition (in addition to the items specified above that already are suspect). The sample set would increase or decrease depending on the condition of the timbers. Most repairs require banding the top section of the bearing piles, where splitting is visible. Coring would help determine how far off the expensive long term repairs might be. The westmar reports indicated several items recommended to monitor. We visually inspected these items and found no significant change and only a few bearing piles that require banding. Since the piers are currently in service, we recommend the above listed repairs be carried out. Refer to the following section for photographs of major damages found on the inspection. 5 P a g e

9 5.0 PHOTOGRAPHS Figures referenced in this report are provided in the section. See below photographs showing damages found during the inspection. Figure 2. Pile Splitting at 16J Figure 3. Typical Cross Brace Deterioration, as shown at 8A-8D 6 P a g e

10 Figure 4. Mechancial Damage to Corbel at 16J Figure 5. Ladder Growth at Low Tide at 20E 7 P a g e

11 Figure 6. 10% CLS Mechanical Damage at 15A A1 Figure 7. Mechanical Damage to Stringer at 13A D1 8 P a g e

12 Figure 8. Mechanical Damage to Stringers at 14A D1 Figure 9. Cross Brace Disconnected and 50% CSL at 12A A1 (BOTTOM) 9 P a g e