2011 169474 20110825 - minutes - manly lagoon catchment

Attachment Booklet

COUNCIL MEETING

22 November 2011

ITEM 10.2

Minutes of the Manly Lagoon Catchment Coordinating Committee held on 25 August 2011

Minutes Manly Lagoon Catchment Co-ordinating Committee

To Committee Members

Citizen members: Councillor Dr Helen Wilkins Warringah Council (Chairperson) Councillor Dr Conny Harris Warringah Council Mr Tom Hazell Warringah Community Representative Dr Frank Gleason Warringah Community Representative Mr Keith Ralfs Warringah Chamber of Commerce and Industry Inc. Mr Ben Davis / Brian Murphy Warringah Mall Management

Councillor Craig Whitting Manly Council Councillor Dr Peter Macdonald Manly Council Dr Judy Lambert Manly Community Representative Ms Evelyn Paterson Manly Community Representative Mr Bob Smith Manly Chamber of Commerce

Mr Mike Baird MP State Member for Manly Mr Mark Roberts Manly Lagoon Committee Mr Chris Barry Save Manly Dam Catchment Committee Mr Michael Bradbery Manly, Balgowlah, Wakehurst, Warringah Golf Clubs

State Government Representatives: Mr Stan Rees NSW Crown Lands Division Mr Gus Pelosi Office of Environment & Heritage (Estuaries) Mr Marcel Green Dept of Primary Industries (Fisheries) Mr Norm Nikolich Sydney Water Ms Jenny Graham Manly SES

Warringah Council Staff Representatives: Mr Malcolm Ryan A/Director Community and Environmental Services Mr Todd Dickinson Manager Natural Environment Mr Adrian Turnbull Team Leader Natural Environment (Strategic Outcomes) Ms Jodie Crawford Senior Environment Officer – Catchment

Manly Council Staff Representatives: Mr Stephen Clements Deputy General Manager Mr Michael Galloway Team Leader, Water Cycle Management Team Ms Christina Femia Catchments Officer, Water Cycle Management Team Mr Ed McPeake Branch Manager Natural Resources & Environmental Partnerships

A quorum of the Committee shall comprise one Councillor from Warringah Council and one Councillor from Manly Council, or their nominees as well as four other members of the Committee.

Notice is hereby given that a Meeting of the Manly Lagoon Catchment Coordinating Committee will be held as follows:

Date: Thursday, 25 August 2011 Time: 5pm

Location: Guringai Room Warringah Council, Civic Centre 725 Pittwater Road Dee Why NSW 2099

Minutes

Minutes For Manly Lagoon Catchment Coordinating Committee

Held on Thursday, 25 August 2011, from 5pm ACKNOWLEDGEMENT OF COUNTRY 1. PRESENT:

Mr Chris Barry (from 6pm – during Item 3.4) Mr Michael Bradbery Ms Jodie Crawford Mr Todd Dickinson Ms Christina Femia Mr Michael Galloway Dr Frank Gleason Ms Erica Griffiths(proxy for Mr Mike Baird MP) Cr Dr Conny Harris

Mr Tom Hazell Dr Judy Lambert Ms Evelyn Paterson Mr Gus Pelosi Mr Stan Rees Mr Mark Roberts Mr Adrian Turnbull Cr Craig Whitting Cr Dr Helen Wilkins (Chairperson)

In attendance: Ms Denise Regan – Warringah Council (Minute taker) Mr Jason Ruszczyk – Warringah Council Mr Josh Crawford – Manly Council

APOLOGIES: Mr Mike Baird, MP (proxy Erica Griffiths) Mr Marcel Green Mr Anthony Hewton Cr Dr Peter Macdonald Mr Ed McPeake Mr Norm Nikolich Mr Malcolm Ryan ABSENT: Mr Ben Davis Ms Jenny Graham Mr Keith Ralfs Mr Bob Smith

The Chairperson announced changes to Warringah Council staff representatives, that being that Todd Dickinson had been appointed Manager Natural Environment and that Adrian Turnbull had been appointed to the role of Team Leader Natural Environment, Strategic Outcomes.

2. CONFIRMATION OF MINUTES

The Minutes of the meeting held 26 May 2011 were circulated to members and reported to the Warringah Council meeting of 23 August 2011. The minutes were confirmed as correct and adoption was moved by Cr Whitting.

Minutes 3. MATTERS ARISING FROM PREVIOUS MINUTES Mr Galloway requested that Item 3.2 be moved ahead of Item 3.1 so Mr Crawford could leave the meeting.

3.2 Burnt Bridge Creek Integrated Restoration Program 2009-2011 Submitted by Manly Council The NSW Environmental Trust grant funds and the project are due to be completed by 24 December 2011; three years after the funds were awarded. An update on the status of completion of each component of the Burnt Bridge Creek Integration Restoration Project will be provided. The 12 month intensive catchment education program will be completed at the end of August. A presentation on the outcomes of the program will be provided by Manly Council staff. Proceedings in brief A presentation was given by Mr Galloway showing the progress of this project (see Attachment 2). The presentation showed project sites, stormwater harvesting at Balgowlah Golf Course, stormwater quality treatment works, aquatic and riparian weed sites and creek bank restoration sites. Bushland works will be completed in September and all creek banks stabilisation projects have been completed. Following on from this presentation Mr Crawford presented the Education component of the project (see Attachment 3).

Recommendation from Committee to Council That the information be received and noted. Moved: Cr Whitting Seconded: Dr Gleason

For: All Voted: Against: Nil

3.1 Sites 1 & 2 Rehabilitation Works

Submitted by Manly Council The Manly Lagoon Dredging Project has now been completed with final Nolan Reserve site restoration works underway. Outcomes of the project will be provided by Manly Council staff, in advance of the formal Before and After Monitoring Reports to be available for the next meeting. Proceedings in brief The Manly Lagoon Dredging Project is now complete pending completion of restoration work to Nolan Reserve. Mr Galloway advised 4,000 tonnes of dredge sediment had been removed and sent for re-use at Kimbriki Resource Recovery Centre. Additionally, 80 tonnes of green waste was also removed as was 3m3 of rubbish including shopping trolleys, tyres and windscreen wipers. Upon completion of dredging, the assessment of seagrass, benthic biota and water quality is due to be finalised in August. The Committee extended its thanks to all concerned for a job well done.

Minutes Recommendation from Committee to Council That the information be received and noted. That congratulations be extended to all parties involved. Moved: Cr Whitting Seconded: Dr Gleason


3.3 Manly Lagoon Flood Study

Submitted by Warringah Council The stormwater pit and pipe survey has been completed for the Manly Lagoon catchment. Approximately 3700 pits were surveyed which was an increase in recorded pit numbers by approximately 25%. This is important information to collect as it has significant impacts on the overland flows within the catchment. The final data set has been provided to Council and uploaded for use. This data has also been provided to the BMT WBM for inclusion in the Flood Study. Proceedings in brief Ms Crawford informed the committee Stage 1 of the Manly Lagoon Flood Study is near completion. Wide community consultation is occurring including an online survey, webpage and mail out to collect photographs of historical flood events. The web page address to make a submission and submit photos is http://gis.wbmpl.com.au/manlylagoon/About.html

Stage 2 of the Flood Study has commenced in parallel with Stage 1 and involves setting up the hydrological model and analysis of predicted rain events.

Recommendation from Committee to Council That the information be noted Moved: Cr Dr Wilkins Seconded: Dr Lambert


3.4 Manly Lagoon Catchment Study

Submitted by Warringah Council All the field work for the Manly Lagoon Catchment Study has now been completed and reports are nearing completion. Warringah Council staff will present the findings at the meeting. Proceedings in brief Mr Jason Ruszczyk, Environmental Officer – Catchment gave a presentation on the Manly Lagoon Catchment Study undertaken over the past two years (see Attachment 4).

Recommendation from Committee to Council That the information be noted Moved: Ms Griffiths Seconded: Mr Bradbery


Minutes 3.5 Manly Golf Course Tour and Manly Lagoon Dredging Project Tour

Submitted by Mr Tom Hazell

Mr Hazell is liaising with Manly Golf Club to organise a suitable time for a site visit. Mr Hazell has also requested a site visit be organised for the Manly Lagoon Dredging Project for Sites 1 and 2. More information will be provided at the meeting.

Proceedings in brief Mr Bradbery, Golf Club representative is to give a presentation to the next meeting and to confirm date of tour then.

Recommendation from Committee to Council That the information be noted. Moved: Cr Dr Wilkins Seconded: Dr Gleason


3.6 Tour of Land Subject to Claim – Manly Dam Catchment

Submitted by Councillor Dr Conny Harris and Mr Stan Rees

Cr Dr Harris would like a tour of land subject to Metropolitan Aboriginal Land Council claims in the Manly Dam Catchment as provided by Mr Rees at a previous meeting. Mr Rees will provide an update at the meeting. Proceedings in brief A presentation was given by Mr Rees of parcels subject to Metropolitan Aboriginal Land Council claim (see Attachment 5). It was agreed those interested in a tour of the sites should register their interest and available dates with Cr Dr Harris.

Recommendation from Committee to Council That the information be noted. Moved: Cr Dr Wilkins Seconded: Dr Gleason


4. GENERAL BUSINESS 4.1 Dry Weather Sewer Leak Investigation Program

Submitted by Manly Council

Manly Council has now conducted a dry weather sewer leak investigation program on foreshores of Burnt Bridge Creek in the Manly Local Government Area. This extends the successful program that had previously been applied on Manly Local Government Area foreshores of Sydney Harbour, Manly Beach, and Manly Lagoon.

The investigations found no dry weather sewer leaks discharging from the Manly LGA into Burnt Bridge Creek. This highlights the findings of other reports, which conclude that the largest contribution of bacteria to Manly Lagoon occurs during wet weather, generally from

Minutes

piped and overland urban stormwater runoff. Future work should be directed to target stormwater quality improvement, and water sensitive urban design in the catchment.

This item was deferred to the next meeting.

4.2 Gross Pollutant Trap Performance Monitoring

Submitted by Councillor Craig Whitting, Manly Council

A brief update is requested from each of the two Councils on the frequency of cleaning and performance monitoring undertaken of Gross Pollutant Traps (GPT’s) surrounding Manly Lagoon.

Proceedings in brief Mr Galloway advised that Manly Council clean their GPT’s 5-6 times per year. Warringah Council representatives took this item on notice and will present a response at next meeting. Manly Council staff were also asked to bring back a report on their satisfaction of the removal and maintenance of the GPT’s.

Recommendation from Committee to Council That the information be noted. Moved: Dr Gleason Seconded: Mr Barry


The meeting finished at 7.20pm 5. NEXT MEETING

Time: ................. 5.00pm Date: ................... Thursday 24 November 2011 Venue: ............... Guringai Room,

Warringah Council, Civic Centre 725 Pittwater Road, Dee Why

Minutes Attachment 1 Indicative Map showing the extent of Manly Lagoon Catchment. The catchment draining to Manly Lagoon is approximately 18 square kilometres, and includes the suburbs of Balgowlah, North Balgowlah, Allambie Heights, Manly Vale, North Manly, Queenscliff, or parts thereof, as well as Manly Dam, four Golf Courses, and Warringah Mall.

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Minutes Attachment 2 – Presentation – Burnt Bridge Creek Project

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BURNT BRIDGE CREEK CATCHMENT

Project Sites

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1. Stormwater Harvesting System

1. Stormwater Harvesting System

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2. Stormwater Quality Improvement Device

3. Modification of the Existing BBC Weir to a Sediment Control Basin

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4. Aquatic and Riparian Noxious Weeds

• Near Witches Glen (Site 2)

• Coral trees, ground cover of weeds

• Rear of 94-108 Balgowlah Road (Site 3)

• Vine weeds, morning glory and anredra

4. Aquatic and Riparian Noxious Weeds

• Bush Regeneration

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5. Creek Bank Restoration and Stabilisation

• Kembridge St to Hope St Bank Site A1


• Kembridge St to Hope St Bank Site A2

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• Kitchener St Bank Site B


• Balgowlah Golf Course Weir Bank Site C ‐ Kitchener

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• West of Pitt St Site D

6. Catchment Wide Education and Engagement

• Presentation by Josh Crawford, Catchment Education Officer

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Minutes Attachment 3 – Burnt Bridge Creek Project – Education - presentation

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Burnt Bridge Creek Integrated Restoration Project

Community Education Program

Objectives1. Inform the community of the reasons for and the components

of the project

2. Increase understanding, awareness and acceptance of stormwater harvesting

3. Increase understanding and awareness of waterway pollution issues

4. Increase understanding of, and participation in, waterway regeneration and rejuvenation

BEHAVIOURAL CHANGE

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Methodology

Promoting the Program• Advertisements in local media

• Existing email lists

• Project website

• Competition posters

• Directly approaching schools

• Newsletters

• Precinct noticeboards

• Manly Environment Centre

• Word of mouth

• Social media???

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Getting the information out there . . .

• Community newsletters

• Interpretive signage

• Local media

• Project website

• Community information evenings

• School events

Community Events• 2011 Clean Up Australia Day

• 2011 Food, Wine and Sustainability Festival

• 2011 Ocean Care Day

• Family Bushcare Day

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Community Events

• 2 Guided Walks and Talks

• Night Hike for scouts

• 2 Bicycle Tours

• Installing Water Tanks and WSUD Workshops

• Sustainable Living in Your Catchment Workshop

Burnt Bridge Creek Photography Competition

• 2 categories – open and kids

• 125 entries received

• $1000 in prizes

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School Events

• 7 of 8 schools in the BBC catchment directly engaged.

• 18 events in total, engaging 1,200 students directly through:

‐ creek tours

‐ interactive activities

‐ drain stencilling

‐ school incursions

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Business/Industry Education

• Stormwater auditing program for 26 businesses in the Balgowlah Industrial Estate

(ongoing)

Still to be completed . . .

• 4 Picnic shelters incorporating existing signage

• 2 Outdoor exercise stations

• Educational signage for Balgowlah GC

• Media release and formal opening

• Final survey and program evaluation

• Final report

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Outcomes

• Over 1,500 individuals engaged directly, 30,000 indirectly

• Positive relationships formed and maintained with:

‐ Residents ‐ Businesses

‐ Schools ‐ Community Groups

‐ Balgowlah GC ‐ Partnering Councils

• Final survey ‐ participation, learning, behavioural change (results provided next meeting)

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Minutes Attachment 4 – Manly Lagoon Catchment Study - presentation

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1

Manly Lagoon Catchment Study

August 2009 – June 2011

Goals

1. To improve Council's understanding of the current ecological condition of Manly Lagoon; and

2. Provide a better foundation on which to base management decisions

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2

Healthy,

coral dominated

state

Macroalgal dominated

state

overfishing of herbivores;

extra nutrients…

A

B

C

Disturbances

“Ecological resilience is a measure of the amount of change or disruption that is required to transform a system from being maintained by one set of mutually reinforcing processes and structures to a different set of processes and structures.”

Ecological Resilience, Biodiversity, and Scale (1998) Garry Peterson,1* Craig R. Allen,2 and C. S. Holling1

“We argue that ecosystems are usefully considered not as fixed objects in space, but as interacting, self-organized sets of processes and structures that vary across scales.”

Initial Concept

Methods

1. Lagoon Sediment Fauna (Benthic Fauna)2. Bird Survey3. Fish Survey 4. Fish Tissue Toxicology 5. Microalgae (Phytoplankton) Assessment6. Dry Weather Sewer Leak Investigation 7. Water Quality - Bacteria and Faecal Source

Tracking8. Public Recreational Use Survey9. Catchment Model10.Low Flow Pipes Management

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3

1. Lagoon Sediment Fauna Review

Conclusions

Manly Lagoon is highly degraded and compares poorly with other coastal lagoons, with the exception of Curl Curl, which is in an equally parlous state.

Fauna is so small in numbers and variety of species that the sediment system of the lagoon can be described as low in oxygen and inhospitable due to the amount of dissolved organic matter .

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4

Such conditions not only inhibit recruitment of species, but will also substantially reduce the capacity of the system to process organic matter and recycle nutrients.

2. Bird Survey

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5

123

4

56

7

8

9

10

11

ResultsNumber of Individuals Within Habitats in Sites

0

100

200

300

400

500

600

700

800

900

1 2 3 4 5 6 7 8 9 10 11

Site Number

To

tal

Nu

mb

er o

f In

div

idu

als

Water

Riparian

Grassland

Species Diversity

0

2

4

6

8

10

12

1 2 3 4 5 6 7 8 9 10 11

Site number

Mea

n N

um

ber

of

spec

ies

1

234

56

7

8

9

10

11

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6

Alcedo azureaAzure Kingfisher26

Nycticorax caledonicusNankeen Night Heron25

Ixobrychus flavicollisBlack bittern24

Ardea albaGreat Egret23

Ardea ibisCattle egret22

Butorides striatusStriated Heron21

Phalacrocorax variusPied Cormorant20

Platalea regiaSpoon Bill19

Chenonetta jubataWood duck18

Threskiornis moluccaWhite (Sacred) Ibis17

Egretta (Ardea) novaehollandiaeWhite-faced Heron16

Porphyrio porphyrioPurple swamphen 15

Larus novaehollandiaeSilver gull14

Pelecanus conspicillatusPelican13

Anas superciliosaPacific black duck12

Venellus miles Masked lap wing11

Phalacrocorax melanoleucosLittle pied cormorant10

Phalacrocorax sulcirostrisLittle black cormorant9

Gallinago sp.Snipe - Lathams?8

Anas gracilisGrey teal7

Gallinula tenebrosaDusky moorhen6

Anas sp.Domestic duck5

Anhinga melanogasterDarter 4

Anas castaneaChestnut teal3

Gallirallus philippensisBuff banded rail2

Phalacrocorax carboGreat cormorant1

Species NameCommon Name

Species identified

26

Consistently Present

23

Most Utilized habitat

Riparian

3. Fish Survey

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Survey 1: 21-23 Jun 10, Survey 2: 19-20 Oct 10, Survey 3: 15-16 Mar 11, Survey 4: 26-27 May 11

Figure showing fish survey sampling locations in Manly Lagoon. Grill nets (red lines, seine nets (blue squares) and beam trawls (green lines). Bait traps were deployed along the bank within 10m of grill nets.

Results

The current study has shown that Manly Lagoon continues to support a diverse and abundant fish community.

Species not common to both surveys were often found in low abundance.

The presence of postlarvae and juvenile commercially and recreationallyimportant fish indicates that the lagoon is been utilised as a nursery ground by these species.

It appears that despite the chronically low macrobenthos in the sediment, a robust and stable fish community is existing.

No significant difference between the community composition of 2001/02 and 2009/10.

Several new species were sampled, including the protected hairy pipefish which is also found in Narrabeen lagoon.

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4. Fish Tissue Toxicology

4 popular recreational fishing species were selected for tissue analysis

•Estuary Perch

•Flathead

•Luderick

•Bream

The edible portion of the fish was analysed for

•Heavy Metals

•Polychlorinated Biphenyl (PCBs)

•Organochlorine Pesticides (OCs)

•Organophosphate Pesticides (OPs)

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Results

Guidelines are set by NSW Food Authority. These are known as Maximum Levels (MLs) and Generally Expected Levels (GELs) in edible tissue. For Manly Lagoon all levels were below detection limits , MLs and GELs:

•Heavy Metals – below but present (zinc and mercury)

•Polychlorinated Biphenyl (PCBs) – below but present on occasion

•Organochlorine Pesticides (OCs) – below detection except for dieldrin

•Organophosphate Pesticides (OPs) – below detection

Est

ua

ry P

erc

h

Bre

am

Lu

de

rick

Fla

the

ad0

5

10

15Survey 1

Est

ua

ry P

erc

h

Bre

am

Lu

de

rick

0

5

10

15Survey 2

Est

ua

ry P

erc

h

san

d m

ulle

t

Lu

de

rick

Se

a m

ulle

t0

5

10

15Survey 3

Est

ua

ry P

erc

h

Bre

am

Lu

de

rick

0

5

10

15Survey 4

EL0910098, August 2011 Cardno Ecology Lab

Figure 1: Mean (± Standard Error) zinc concentrations (mg/kg) in species of fish caught in Manly Lagoon between June 2010 and May 2011.

- June 2010 - October 2010

- March 2011 - May 2011

Estuary Perch

YellowfinBream

Luderick Dusky Flathead

Estuary Perch

Estuary Perch

YellowfinBream

Luderick

LuderickYellowfinBream

Estuary Perch

Sand Mullet

Sea Mullet

Luderick

n=5

n=2

n=4 n=1 n=7 n=1 n=4

n=1 n=1 n=9 n=1

n=6

n=2

n=4

Zin

c (m

g/kg

)

GEL

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Total PCBs in Bream (Georges River) and Estuary Perch (Manly)

– Alexandra Canal – 1202 ug/kg– Manly Lagoon - 24 ug/kg

Comparable Studies

Manly Lagoon (2010) vs Georges River (90’s)

Dieldrin in Luderick

Alexandra Canal 27 ug/kgManly Lagoon 0.016 ug/kg

5. Microalgae (Phytoplankton) Assessment

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Objectives

Investigate whether the phytoplankton community of Manly Lagoon is dominated by any one species

Presence/Absence of Procentrum minimum as a eutrophication indicator

‐2.00

0.00

2.00

4.00

6.00

8.00

10.00

12.00

35 36 37 38 39 40 41 42 43 44

Chlo a concentration (ug/L)

Week

Concentration of chlorophyll a in Manly Lagoon Jan‐ July 2011

Site 11

Site 12

Site 13

Results

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Conclusions

Diversity is looking good, even at site 3 we are getting marine species and a normal mix of dinoflagellets and diatoms despite chl a being quite high due to tiny green flagellates

P. Minimum – It’s a species with a fast response to nutrients (iesudden blooms that have collapsed by the time of the next sampling) however blooms are not persisting

Probably due to flushing or other mechanisms for nutrient export out of the lagoon

P . minimum is frequently present, and occasionally blooms, in other estuaries. eg

Hawkesbury River this week

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6. Dry Weather Sewer Leak Investigation

Aligned with Sydney Water’s SewerFix

Program

Complemented Manly Council’s own

investigation in their LGA

Results = NEGATIVE

= POSITIVE

Stormwater Drainage Network

The evidence is suggesting that no sewage is entering the lagoon via

stormwater drains during periods of dry weather, therefore we decided to

investigate the faecal bacteria loading in the lagoon.

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7. Water Quality - Bacteria and Faecal Source Tracking

E. coli and Enterococcus Counts from a Wet Weather Special Collection

E.coli

Entero

0

1000

2000

3000

4000

5000

6000

7000

8000

2° Contact ENTERO

2° Contact E.COLI

cfu

/100

ml

Collection #: WetWeather SpecialCollection Date 22/3/2011

Sampling Sites

1

32

4

5

6

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Mean Enterococci (cfu/100ml) across all rain events

0

50

100

150

200

250

300

350

1 2 3 4 5 6

SITES

En

tero

cocc

i (c

fu/1

00m

l)

Enterococci (cfu/100ml)

Bacteria Results

BeachWatch/NHMRC

ANZECC

Primary

Secondary

Mean Enterococci at 0 and 0-10 mm of rain 3 days prior to sampling

0

50

100

150

200

250

300

1 2 3 4 5 6

SITE

En

tero

cocc

i (c

fu/1

00m

l)

Entero @ 0mm rain

Entero @ 0-10mm rain

Secondary

Primary

ANZECC

BeachWatch/NHMRC

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unsuitableunsuitable unsuitable unsuitable unsuitable unsuitable 144.7

unsuitableunsuitable OK - 2ndunsuitable unsuitable unsuitable 20.3

OK - 2ndOK - 2ndOK - 2ndOK - 2ndOK - PrimOK - 2nd 20.2

OK - 2ndunsuitable OK - PrimOK - PrimOK - PrimOK - 2nd 8.7

OK - 2ndOK - 2ndOK - 2ndOK - PrimOK - 2ndOK - 2nd 8.3

OK - 2ndunsuitable OK - 2ndOK - 2ndOK - 2ndunsuitable 8.0

unsuitableOK-2ndOKOK-2ndOK-2ndunsuitable4.8

unsuitable OK - 2ndOK - 2ndOK - 2ndOK - 2ndOK - 2nd 4.0

unsuitable unsuitable OK - PrimOK - PrimOK - PrimOK - 2nd 3.8

unsuitable OK - 2ndOK - 2ndOK - 2ndOK - 2ndOK - 2nd 1.8

OK - 2ndOK - 2ndOK - PrimOK - 2ndOK - PrimOK - 2nd 0.8

OK-2ndOK-2ndOK-2ndOK-2ndOK-2ndOK-2nd0.3

unsuitable OK - 2ndOK - PrimOK - PrimOK - PrimOK - Prim0.3

OK - 2ndOK - 2ndOK - 2ndOK - PrimOK - PrimOK - Prim0.2

unsuitable unsuitable OK - 2ndOK - 2ndOK - 2ndOK - 2nd 0.2

unsuitableunsuitableOK-2ndOK-2ndOK-2ndunsuitable0.0

OK - 2ndunsuitable OK - 2ndOK - 2ndOK - 2ndOK - 2nd 0.0

OK - PrimOK - 2ndOK - 2ndOK - 2ndOK - 2ndOK - 2nd 0.0

unsuitable unsuitable OK - 2ndOK - PrimOK - 2ndOK - 2nd 0.0

unsuitable unsuitable OK - 2ndOK - PrimOK - PrimOK - 2nd 0.0

OK - 2ndunsuitable OK - PrimOK - PrimOK - PrimOK - 2nd 0.0

unsuitable unsuitable OK - 2ndOK - PrimOK - PrimOK - Prim0.0

OK - 2ndOK - 2ndOK - PrimOK - PrimOK - PrimOK - Prim0.0

OK - 2ndOK - 2ndOK - PrimOK - PrimOK - PrimOK - 2nd 0.0

SITE 6SITE 5SITE 4SITE 3SITE 2SITE 13d Rain

Site Results and Response to Rainfall

DNA Investigations for Bacteria Source Tracking

Table 1:The presence/absence of PCR fragments for each site and collection time.

++‐+‐+‐+‐+++Collection 5

++++++‐+++++Collection 4

++++‐+‐+‐+++Collection 3

++++‐+‐+‐+‐+Collection 2

++++‐+‐+‐+++Collection 1

Human

General

Human

General

Human

General

Human

General

Human

General

Human

General

Site 6Site 5Site 4Site 3Site 2Site 1

Results summaryAll sites for all collection times have resulted in positive PCR products for general Bacteroides. However, not all of these sites were positive for Human Bacteroides, see Table 1 for these results.

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8. Public Recreational Use Survey

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400 CATI interviews of Manly and Warringah residents living within 5km of Manly Lagoon (Computer Assisted Telephone Interviewing)

300 face-to-face interviews of Manly Lagoon users between November 2010 and February 2011

Tools

In order to be able to benchmark the RELATIVE IMPORTANCE of particular responses received during the interview process, we used Warringah’s normative importance score derived from our 2010 Community Satisfaction Survey where residents we requested to indicate the importance of a range of services, assets and facilities.

Benchmarking

Mean importance - 8.22

Upper quartile - 8.95

Lower quartile - 7.55

Score > 8.95 = top 25% priority

Score < 7.55 = bottom 25% priority

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Results

Primary Contact Recreation – There was not evidence that it is a community priority, ie. Not in the top 25%

To be a community priority the score assigned would need to be significantly higher than the average benchmarking score for importance

Secondary Contact Recreation – scores were significantly below the average importance score, ie. very low community importance

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Preferred swimming areas

Whilst residents and lagoon users indicated that they would like to be able to have primary contact with the lagoon, the benchmarking evidence indicates that, within the context of priorities such as road maintenance, community services and general environmental management, the importance of making manly Lagoon safe for primary contact is only of average importance.

While the idea of swimming in Manly Lagoon is appealing in an idealistic sense, even if scientific studies showed that it was suitable for swimming, the outcomes from both surveys clearly indicate it would be the least preferred swimming location.

In conclusion, there is no clear imperative that the residents or Lagoon users feel that the Council should prioritise a remediation program designed to increase the scope of usage of the asset. It is clear, however, that both residents and users do feel that as the asset is accessible to the public, it should be kept as clean and safe as possible.

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9. Manly Lagoon Catchment Model

The pollutant budget and the sediment budget show the various inputs and outputs within the catchment on an annual average basis, including:

• Sediment• Total Nitrogen• Total Phosphorous• Pathogen Indicators• Heavy metals

The budget also provides a breakdown of the contributions from stormwater and sewer overflows.

Objectives

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Characteristics

Catchment Area

1800 ha

Residential – 40%

Forested – 24%

Roads – 16%

Open Space – 11%

Commercial – 9%

Subcatchments

Burntbridge Ck

70% impervious

Brookvale Ck

64% impervious

Manly Ck

50% impervious

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Stormwater

Manly Lagoon catchment has significantly lower pollutant inputs than other typical urban values – TSS 67% of the average value for other catchments in Sydney while TP and TN are 56% lower

These values are further supported by Burnt Bridge Creek Pollutant study providing greater confidence in the models outputs

Sediment Loads

Mean : 3,470 tonnes/year

Upper Estimate: 12,320 tonnes/year

Lower Estimate: 980 tonnes/year

Local Values Estimate: 1,100 tonnes/year

Page 47 of 63

24

Sources of Sediment in Stormwater Runoff

Total Sediment Load – By Land Use Total Sediment Load – By Land Zoning

Total Phosphorous – By Land ZoningTotal Phosphorous – By Land Use

Total Nitrogen – By Land Use Total Nitrogen– By Land Zoning

Page 48 of 63

25

Manly Dam and Manly Lagoon

Sediment

Manly Dam – removes 85% generated from its catchment (420 tonnes/yr)

Manly Lagoon – removes 65% of sediment from its catchment (2000 tonnes/yr)

Nitrogen

Manly Dam – removes 30% generated from its catchment (2,050 tonnes/yr)

Manly Lagoon – removes 20% generated from its catchment (7,900 tonnes/yr)

Phosphorous

Manly Dam – removes 50% generated from its catchment (430 tonnes/yr)

Manly Lagoon – removes 40% generated from its catchment (2,400 tonnes/yr)

10. Low Flow Pipes Maintenance Plan and MoU

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26

Key Outcomes• New and improved MoU between Manly and Warringah Councils

• Maintenance Plan defining roles and responsibilities - Signed off by both Councils

• Clear communication protocols between Manly and Warringah

• Improved staff awareness of kelp amassing occurrences at Manly and Queenscliff beaches

– This will improve the speed at which blockages will be avoided and if so needed, pipe clearance works.

• 5 year rolling permit from Fisheries will facilitate a more rapid response to any pipe clearance works should they arise

– This has been the process bottleneck which lead to decomposing kelp and public dissatisfaction.

• On demand and easily mobilised Contractor to undertake clearanceworks within a timeframe small enough to eliminate opportunity for kelp decomposition and impact to residents

Page 50 of 63

27

March 28 2011

Example of the effectiveness of open communication across Councils and the functionality of natural processes.

April 6, 2011

Page 51 of 63

28

1. Lagoon Sediment Fauna (Benthic Fauna)

2. Bird Survey

3. Fish Survey

4. Fish Tissue Toxicology

5. Microalgae (Phytoplankton) Assessment

6. Dry Weather Sewer Leak Investigation

7. Water Quality - Bacteria and Faecal Source Tracking

8. Public Recreational Use Survey

9. Catchment Model

10.Low Flow Pipes Management

Conclusions

Page 52 of 63

Minutes Attachment 5 – Aboriginal Land Claims - presentation

Page 53 of 63

MANLY CREEK CATCHMENT Crown Reserves under Aboriginal Land Claim

R68892

Manly Warringah War Memorial Park

Page 54 of 63

MANLY & WARRINGAH DISTRICT PARK ACT, 1972Land to be used for Public Recreation under LGA

Crown Plan 10326-2030 9-1-31Crown Plan 10315- 2030 21-11-58

Page 55 of 63

R84688

R87786R752038

R752038

R752038

ALC 23168

ALC 23057 ALC 23168

BATE AVENUE TO MANLY CREEK /DAVID THOMAS RESERVE

RESERVE No Public Purpose Management Lot No/ Deposited Plan Aboriginal Land

Claim No

R84688

Gaz 10‐1‐64

Future Public

Requirements

Crown Lands Division Lot 2501 DP 752038 23168 (lodged 3‐12‐

09 incomplete)

R87786 Public Recreation Devolved to Warringah

Council

Lot 2705 DP 752038 23057 (lodged 3‐12‐

09 incomplete)

R752038 Future Public

Requirements

Crown Lands Division Lot 7371 DP 1165577 23168 (lodged 3‐12‐

09 incomplete)

R752038 Future Public Rqts Crown Lands Division Lot 2705 DP 752038 23057 (lodged 3‐12‐

09 incomplete )

Curl Curl (Manly)

Creek

Crown Waterway

(Non‐tidal)

Crown Lands Division N/A

Manly Cre

ek

Crown Road shown in brown cross hatch

Page 56 of 63

End of Bate Avenue

Staircase at end of Bate AvenueNo access to David Thomas Reserve

Staircase rails are rotting & it is becoming unsafe to use

David Thomas Reserve

CREEK AREA AT BOTTOM OF STAIRCASE BATE AVENUE

Balloon Vine is smothering taller trees

Coral Trees in watercourse

Substantial stormwaterflow

Decayed bottom step

Page 57 of 63

R81298

ALC23137

DAVID THOMAS RESERVE

Reserve Reserve

purpose

Trust Management Lot DP ALC Status

R81298

Curl Curl Creek

at Allambie

Gaz. 12‐12‐58

Public

Recreation

Devolved to

Warringah Council

Lot 1490 DP 752038 23137 (lodged

3‐12‐09

incomplete)

R81298 WEST OF CURL CURL (MANLY) CREEK

Weed management David Thomas Reserve

DAVID THOMAS RESERVE

MERMAIDS POOL

DAV

ID T

HO

MAS

RES

ERVE

MERMAID POOL

Page 58 of 63

MERMAID POOL

MANLY

CREEK

MERMAID POOL

CAMPBELL PDE

CAMPBELL PARADE ACCESS TO MERMAID POOL

Cro

wn R

oad

WANDELLA RD

MA

NLY

CR

EE

K

MERMAID POOL

Footbridge Mermaid Pool

R752038

Note: R 752038 opposite Lot 7370 DP 1165551 No Claim

(Unformed)

for future public requirements

Page 59 of 63

Reserve Public Purpose Trust Manager Lot DP ALC status

R752038 Future Public

Requirements

Crown Lands Division Lot 7369 DP 165551 23135

(MLALC Lodged 3‐12‐09 incomplete)

ALC 23135

R752038

RESERVE 752038 west of Wandella Rd & south of Jenna Close

Manly Creek Houses Jenna Close

Drain off Wandella Rd

ALC23235

ALC23133

ALC23174

ALC232366

ALC6962

Reserve purpose Trust Management Lot DP ALC Status

Manly Dam‐ Bed Crown

waterway

Public

Recreation


(R68892) Trust (22‐8‐97) – affairs

managed by Warringah Council

Manly reservoir to high

tide mark including all

islands Lot 7550

DP1167548

6962

(lodged 16‐6‐03

incomplete)

R68892 Manly Warringah War

Memorial Park (373.6 ha)

Gaz: 8‐12‐39

Public

Recreation


(R68892) Trust (22‐8‐97) – affairs

managed by Warringah Council

Lot 7072 DP752038

Dam catchment 388.5 ha

& Others

23235, 23133,23174

(lodged 3‐12‐09

incomplete)

R19716Mc Comb Trig Station

17‐2‐1894

Trig

Purposes

Crown Lands Division Lot 7074 DP1029974 23236(lodged 3‐12‐09

incomplete)

R68892

R19716

R68892

SOUTHERN END MANLY DAM

East of Reserve Rd (Crown road) - King St

Page 60 of 63

KING ST – RESERVE RD

Bushland in photo below is part of R68892 and Manly Warringah War Memorial Park

Properties south end Maroa Crescent on approx line of Manly Dam wall

Reserve Reserve

purpose

Trust

Management

Lot DP ALC Status

R68892

Manly

Warringah

War

Memorial

Park

Gaz: 8‐12‐

39

Public

Recreation

(R68892) Trust

(22‐8‐97) –

affairs managed

by Warringah

Council

Lot 7072

DP752038

Dam catchment

388.5 ha &

Others

23006 &

23841

(lodged

3‐12‐09

incomplete)

ALC233411

ALC23006

R68892

R68892

BIKE TRACK MANLY DAM– northern end

Page 61 of 63

MAROA RESERVE

R79597

ALC231366

Reserve Public

Purpose

Trust name Lot DP Land Claim

No

R79597

Gaz: 10‐5‐57

(off Maroa

Cres)

Public Hall,

Public

Recreation

Allambie

(R79597) Reserve

Trust Warringah

Council

Lot 1479 DP

752038

23136

(lodged 3‐12‐

09

incomplete)

WANDELLA RESERVE

Reserve Reserve

purpose

Trust Management Lot DP ALC Status

Wandella

Reserve

R88111

Public

Recreation

Devolved to

Warringah Council

Lot 7128

DP

1029129

ALC23228

lodged 3‐12‐09

incomplete

R88111

ALC2322828

off Carinya Close

Page 62 of 63

Crown Reserves are generally zoned as: Public Open Space

Regional Open Space Reservation Exceptions as shown

East of Bate Ave & South of Jenna Close

Page 63 of 63

2011 169474 20110825 - minutes - manly lagoon catchment

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