Kingfisher Parade Seawall 29 8 2013 Safety Share 1. Evacuation - PowerPoint PPT Presentation

Kingfisher Parade Seawall 29 8 2013

Safety Share 1. Evacuation plan

Safety Share 1. Evacuation plan

Program 1. Design standard 2. Development approvals 3. Cost estimates 4. Design – Quarry, testing and structural form 5. Program

Risk analysis & Design standard

Functional requirements • Draw a line in the sand • Halt on-going erosion • Less than 5% damage during a 50 year storm event • A design life of 50 years … What it is not: • A structure designed for flood protection • A structure that can survive without maintenance

Design Criteria Australian Standard – 4997 – Maritime Structure Guildelines Recommended design wave event Small craft harbour – principal residence Main harbour - high value properties

Development Approvals

Legislative approvals Permit/Approval Legislation Administering Trigger Statutory timeframes Comment authority Federal Environmental Referral of proposed action SEWPaC Impacts to federally 20 business days. Not likely to apply. Self assessment can be undertaken if Protection and listed species or necessary. Biodiversity habitat. Conservation Act 1999 State Coastal Protection Operational Works that are FCRC/DEHP Undertaking tidal IDAS timeframes apply. Required. FCRC will act as the Assessment Manager, and Management Prescribed Tidal Works works DEHP as concurrence agency. Act 1995 Development application to provide assessment against the PTW Code (Coastal Act), Coastal SPRP, and the SDAP provisions. Marine Parks Act Marine Park Permit DNPRSaR Undertaking works No statutory timeframes Boundary of marine park in this instance is the 2004 within the boundaries applicable. ‘esplanade’ boundary. Works are located within a of the Great Sandy ‘Habitat Protection Zone’. Applications typically take up Strait Marine Park to three months, which Permit will be required for Option B where works are includes a 35 business day located outside of the ‘esplanade’. period for Native Title Also required where construction activities are required Notification. outside of the esplanade (eg. machinery/access). An EMP will be required to outline measures for protection of marine environment during construction. Nature Protected Plants Clearing DNPRSaR Destruction or damage 40 business days (with an Required for the removal of native vegetation. Conservation Act Permit to native flora/fauna. additional 20 business day 1992 information request period). Fisheries Act 1994 Operational Works within a DAFF Undertaking IDAS timeframes apply. Required for Option B where works are located outside Declared Fish Habitat Area assessable works of the ‘esplanade’. (FHA) completely or partly within the boundaries of the Beelbi Fish Habitat Area Fisheries Act 1994 Operational Works for the DAFF Clearing of marine IDAS timeframes apply. Required where the removal of marine plants (eg. Salt removal, destruction or plant species couch) is required. damage to Marine Plants An Offset Strategy will be needed for Public works where area of fish habitat impact ≥ 25m2 (0.0025 ha). Can be direct or indirect offset. Vegetation Operational Works for DNRM Clearing of remnant IDAS timeframes apply. Required for the clearing of least concern RE’s on State Management Act vegetation clearing vegetation on land. 1999 unallocated state land. Exemptions may apply for works within the road reserve A re-vegetation strategy will be required to demonstrate measures to rehabilitate the environment.

Legislative approvals Permit/Approval Status Next step Early indication Actual timeframes Comment Federal Not applicable Referral of proposed action N/A Ecological Survey did not find federally listed species State Pre-lodged with Operational Works that are FCRC to lodge Favourable SARA timeframes apply. Required. FCRC will act as the Assessment Manager, agency Prescribed Tidal Works formally DEHP as concurrence agency. “matter of days” Development application to provide assessment against the PTW Code (Coastal Act), Coastal SPRP, and the SDAP provisions. 2006 survey line Marine Park Permit Marine Park Favourable, with No statutory timeframes Native title notification - sent (in fact 2004) conditions conditions in EMP applicable. Cultural heritage notification – sent Detailed discussion pending Applications typically take up Pre-lodged mid DNPRSaR to three months, which includes a 35 business day August FCRC period for Native Title Notification. Pre-lodged Protected Plants Clearing DNPRSaR Favourable 40 business days (with an Minor destruction Permit additional 20 business day FCRC information request period). 1981 survey-line Operational Works within a DAFF Favourable SARA timeframes apply. Works are likely to be outside Zone A Declared Fish Habitat Area (FHA) N/A follow FHA Operational Works for the DAFF Favourable SARA timeframes apply. No impact in this zone removal, destruction or Clearing of marine damage to Marine Plants plant species N/A Operational Works for DNRM Favourable SARA timeframes apply. A re-vegetation strategy will be required to vegetation clearing demonstrate measures to rehabilitate the environment.

Cost estimates

Cost estimates Basis “Minimum damage” following a 50 year ARI storm tide event Dundorwan Quarry would provide armouring Calculated Risk 2 % risk each year of “minimum damage” to be exceeded 33% risk over 20 year of “minimum damages” to be exceeded Key design parameters Storm Tide Level 2.85m AHD Significant wave height 2.5m*

Cost estimates

Total estimates

Quarry

Quarry Material Testing • Lithology - classification • Density • Water absorption • Porosity • Unconfined Compressive Strength • Point load test • Sonic velocity • Schmidt impact index Aurecon Rock Quality scale • Los Angeles Abrasion • Sulphate Soundness Test Not assessed • Micro Deval Abrasion “Excellent” • Wet-dry loss “Good” “Moderate” • Secondary mineral content “Low” “Unsuited”

Procurement & reliability Stone weathering - OK Change in seawall shape – N/A Quarry capacity - OK Quarry yield / grading - OK Installed grading – Quality Control Stone stockpiling – To Be Confirmed

Rock Degradation Erosion Fracture Plane Rock Quality is: “Excellent” “Good” “Moderate” “Low” “Unsuited”

Physical testing

Test schedule 8-9 August 2013 3 cross section tested:

Armour Stability

“Pattern” placement

Overtopping - Normal conditions 10 m Mean High Water Spring

King Tide 10 m “king tide”

King Tide + waves 10 m Some overtopping

“50 year” storm event Rainfall/run-off Wave run-up and high overtopping

“50 year” storm event Rainfall/run-off Wave run-up and high overtopping Scour Possible partial collapse at the back of the crest Scour Collapsible toe to mitigate Risk of seawall undermining

Drawings

Alignment

Cross section

Cross Section (detail)

Staircase

Program

Detailed design End August 2013 All Development Application submitted Early September 2013 Tendering period September 2013 Start of work (stockpiling, clearing) Early October 2013 Completion January 2013 Mobilised Personnel and key plant (incl. quarry and construction site) A dozen “full time” workers + (Clearing//Survey/engineer/project management, etc…) 2 - 4 haul trucks 3 x large excavators, bobcat, 4WDs, etc… Site office, change room, toilets Safety (Traffic control?, etc…)

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