NEIGHBOURHOOD DRAINAGE FORUM

& FLOOD MANAGEMENT PLAN

HOSTED BY:

MOONEE VALLEY COUNCIL – ENGINEERING AND ASSET- David Fricke, Executive/Manager Engineering & Assets- Kosta Smirnis, Acting Manager Engineering & Assets

- Robert Bober, Interim Coordinator Engineering Services

MELBOURNE WATER CORPORATION - FLOODPLAIN STRATEGY- Keith Boniface, Manager Flood Strategy Implementation

- Nicole Biscan, Program Communications Flood Strategy Implementation

STATE EMERGENCY SERVICES (SES), Emergency Response Unit- Alice Godycki, Acting Regional Officer Emergency Management

- Ross Butler, DOJ

PURPOSE STATEMENT FOR THE DRAINAGE FORUM:

I. SUMMARISE 2010 FLOODING EVENTS IN MVCC

II. EXPLAIN ROLES AND RESPONSIBILITIES(MVCC, MELBOURNE WATER, SES AND PROPERTY OWNER)

III. REVIEW DRAINAGE ASSETS(NATURAL AND MAN-MADE, CAPACITIES AND LIMITATIONS)

IV. SMALLER SELF HELP IMPROVMENTS FOR RESIDENTSDEAS TO REDUCE FLOOD IMPACTS FOR RESIDENTS

I. SUMMARY OF MVCC FLOODING EVENTS IN 2010

The recent storm events of 2010 significantly affected residents, many which resided in areas outside the 100-yr flood overlay zones.

- ABERFELDIE- ASCOT VALE WEST- KEILOR EAST- NIDDRIE- MOONEE PONDS

coomes consulting

1 Etka Avenue, East KeilorPeak flows during storm event

(Note: Main Drain at tree base)

1 Etka Avenue, East KeilorStorm Aftermath

Note: Extensive debris load

MWC Flood Overlay (brown), see arrow as view to east at MWC’s Niddrie West Drain (4238)

II. EXPLAIN ROLES, CAPACITIES AND LEVELS OF RESPONSIBILITIES

(MVCC, MELBOURNE WATER, SES AND PROPERTY OWNER)

MOONEE VALLEY COUNCIL (and all municipal corporations in the greater Melbourne Area)

Asset capacities for water volumes of storm events:- 5 yr ARI Storm events for underground drains - 5 to 20 yr ARI Storm events for overland flow paths

Funding capacities for routine maintenance, repairs, re-instatements, new construction and renewals

- Annual Drainage Budget approximately $600-700K- MVCC Annual Drainage Emergency Fund approximately $ - MCVV CCTV Budget

II. EXPLAIN ROLES, CAPACITIES AND LEVELS OF RESPONSIBILITIES

(MVCC, MELBOURNE WATER, SES AND PROPERTY OWNER)

Melbourne Water – (SBO & LSIO)

Asset capacities for water volumes of storm events:- Main Drain Conveyance Systems: anywhere from 5-100 yr ARI - Overland Flowpaths

Funding capacities for routine maintenance, repairs, re-instatements, new construction, renewals and RDS

- We might further coordinate with data furnished by Melbourne Water through their publications and communications

II. EXPLAIN ROLES, CAPACITIES AND LEVELS OF RESPONSIBILITIES

(MVCC, MELBOURNE WATER, SES AND PROPERTY OWNER)

Victoria State Emergency Services

Explanation from SES on the extent and types of services they provide.

Funding capacities ands staffing for flooding emergencies in Victoria, routine maintenance, repairs, re-instatements, new construction, renewals and RDS

- We might further coordinate with data furnished by Melbourne Water through their publications and communications

III. REVIEW DRAINAGE ASSETS(NATURAL AND MAN-MADE, CAPACITIES AND LIMITATIONS)

Underground Drainage Assets- Council Drains (underground and surface spoon drains)- Council Side Entry Pits (SEP), Grated Pits and laneway swales- Melbourne Water Main Drains- Vic Roads shared drainage assets

Above Ground Drainage Assets - Regional Drainage Retention Reserves (MWC)- Regional Drainage Detention Reserves (MWC, State, Fed)- Private Onsite Detention Systems (OSD)- Lakes, Rivers, Creeks, Ponds- Overland Flow Paths (private, MVCC, MWC, Vic Roads, etc . . . et al)

Minor drainage system, with kerb & channel, SEP (side entry pit), underground barrel drain, and outlet (top). Council system capacity reached at a 2 to 5-yr storm event.

Major drainage system where Council drainage asset capacities are reached or exceeded. Overland flow prevails to stream or water body course downstream, eventual reaching Port Phillip Bay (bottom).

MINOR AND MAJOR DRAINAGE DESIGN STANDARDS

Major drainage system where Council drainage asset capacities are reached or exceeded. Overland flow prevails to stream or water body course downstream, eventual reaching Port Phillip Bay (bottom).

IV. SMALLER SELF HELP IMPROVMENTS FOR RESIDENTSDEAS TO REDUCE FLOOD IMPACTS FOR RESIDENTS

- Guard and/or construct measures to deflect and channel threatening flood flows- Raise fencing in locations adverse to flow patterns - Modify garden areas to channel overland flow

4. What assistance is available to reduce or eliminate flooding? (continued) Larger frequency flooding events:

D. Roadway and Property Flooding surcharging/popping pit lids and Side Entry Pits (above 5-yr and below 100-yr flooding events) - MVCC to conduct engineering investigation, jet pipes, and/or conduct CCTV works.

E. Land subject to flooding and inundation: Planning Scheme Overlays (LSIO and SBO) – SES to be notified with MWC following investigations into Main Drainage system, reviewing the Flood Management Plan, conduct catchment modelling analysis and investigate main drainage asset conditions

Construct a low brick wall to deflect overland flow away from the entrance.

Either remove or raise (25-50mm) a lower section of fence to allow overland flow past.

Examples of flooding damage:

Examples of potential drainage protection/improvements:

Where can I get information to determine whether my property or one I want to buy is in a flood zone? A. Land subject to flooding and inundation: Melbourne Water Planning Scheme Overlays (LSIO) – go to the website under

“Go to the land channel”

www.land.vic.gov.au

Select: Planning Maps Online (right margin of page)

Where can I get information to determine whether my property or one I want to buy is in a flood zone? B. General flooding and smaller drainage problems (nuisances and investigations for house foundations, stumping, dry-rotting, etc.)

Answer: Contact Engineering Services and make an appointment, or submit a formal, written request for about the property, and specifically enquiring about known drainage patterns and/or problems.

Recording flood events

Emergency Checklist Procedures1. What exactly do you wish to report?2. What is your street address and suburb?3. Do you need medical assistance?4. Is there any threat to life?If so, what is the nature of the threat?5. Do you need to evacuate the premises you are occupying and do you need assistance in order to achieve that?Do you have some accommodations to go to after you evacuate? How many people are involved?Do any need specialist care, eg. infants, elderly or disabled?Are pets or animals catered for?6. Do you have the telephone No for the SES (combating agency in flooding events)?

Offer the Ph No for SES if appropriate (9684 6651).7. Name of caller making report, and ph No for possible follow up contact.8. Do you have your “Emergency Flood Kit”?This is made up of items collected by the resident following SES guidelines, for use in emergency events.9. Are motor vehicles threatened?Can they be moved immediately, and safely, to higher ground?10. Is water in the house (ie. carpets wet)?Are there low level electrical appliances or fittings? If “Yes”, lift appliances to well above flood level, or turn electricity supply off at main switchboard if necessary. Lift other furniture and household items to higher levels (or stack) if possible.11. Is water in the garage?Are there low level electrical appliances or fittings? If “Yes”, lift appliances to well above flood level, or turn electricity supply off at main switchboard if necessary. Lift other garage items to higher levels (or stack) if possible. Prevent water reaching stored chemicals, and tie down items, which could float away, eg refuse and recycling bins.12. Do you have a camera to record a photographic record of the event, noting time and date?Can you place a mark, or otherwise note exactly the highest level the floodwater reached?

If able to, please also note how long approximately the floodwaters take to recede.