Mordialloc Creek Dredging Program Outline

2011 - 2012

Contents

1. Background

2. Program Scope

3. Stakeholders

4. Program Pre-conditions

5. Funding Arrangements

6. Related works program

7. Sustainable Management Plan

1. Background

• Natural tidal creek• Heavily modified by

channels, revetments, training walls.

• Was the natural outlet of the Carrum Swamp

• Historic boat harbour• Upstream now more

estuarine condition

Dredging history

• Melbourne Water performed dredging in the past

• No significant dredging in section A since 1997

• Section B was last done in 2000

• Some maintenance dredging since 2000

Mordialloc Village

• Important Council focus– Mordialloc Master Plan

• Structure plan for the area

– Historic fishing village and boat harbour

– Commercial and recreational hub

Mordialloc Creek

• Responsible Agencies– Melbourne Water– City of Kingston– Parks Victoria– Dept Sustainability & Environment– EPA Victoria

• Affected Agencies– Victrack– Vic Roads

Mordialloc Creek (cont)

• Melbourne Water Responsibilities– Manage and monitor the health of rivers,

creeks and wetlands – Manage the regional drainage system – Provide a safe level of flood protection – Regulate works on rivers and creeks – Make sure urban development is safe and

meets flood and environment standards.

Mordialloc Creek (cont)

• Kingston CC Responsibilities– Be the Committee of Management

for the nominated Crown Land • Manage the reserve• Develop the reserve• Enter into contracts• Enter into tenure arrangements• Enforce regulations

2. Program Scope

• PHASE 1– Lambert Island Section

• Tasks• Tender & Contract• Consents & Approvals

• PHASE 2– Sections A, B & C

• Tasks• Tender & Contract

Dredging Tasks

• Method• Barge mounted bucket excavator• Partially dewatered in a hopper barge• Cationic polymer added to trap ASS

and pollutants• Floating silt curtain to trap plume• Timing to avoid fish breeding times • Class C contaminated silt disposal to

landfill

Dredging Sections

Channel Profiles

3. Stakeholders

• Community– Residents– Mordialloc Creek Community– Commercial Operators– Village Traders’ Group

• Agencies – DSE– MW– PV

4. Program Preconditions

• Stage 1– Consent from DSE– Consent from EPA Victoria

• Stage 2 – Funding from State Government– Sustainable Management Plan– MOU joint management with PV

and MW

5. Funding Arrangements

• Stage 1– City of Kingston

• Stage 2 – State Government– City of Kingston (related or ancillary

works)

6. Related Works

• Mooring pole replacements

• Landings & Jetties

• Revetments, walls

• Slipways

• Other– Wave barriers (PV)– Training walls (PV)– Structure / Master plan items

7. Sustainable Master Plan

• Precondition for 10 year consent

• Will look at sustainable dredging practice

• Will look at sustainable funding arrangements

• KCC + MW + PV joint plan

• May set rules on boat size / operation