Of P{J81./ CHIPPING ~ 0 ~«; NORTON ~ I . 1 LAKE ~.~~ ~ \ PLANNING '" " ,' .... ", ' :'.:'''~~~~~~:~~,~ ~: ' .. . .. SOUTH WALES . ~ : . , .~' . '\~.~. ,,,, . ~'. ' ':' .. N EW STUDY . ' . ... "':'~" \' ;.--::;" " - ~~"""~~, ' . ':, ,..... "'",,",. ~ " ','', ' ."" <. "' '\~'"" ..' .:' " . ~~ . , ::- study ,- . :..: :.;~., :. ,~,: area . . ,;;. ,.\" number 1 : .. ~ }- , .-f' I '/

OCTOBER 1978

COX AND CORKILL, PTY. LTD. Planning and Environmental Analysis c:...-.---- . : .--' - - . J 2 McManus Street McMahons Point North NSW 2060 PWD 78025 '

CONTENTS

1 INTRODUCTION 3 • General • Regional Location 1 • Objectives 8 1 • Master Plan • Existing Conditions • Bank Conditions :1 • Study Area No. 1 Chipping Norton Lake (Wildlife Island only) Lansvale Residential Community 1 Bay (Georges Hall Bay Point only) I Georges Hall Lake Front STUDY AREA NUMBER 1 23 • Master Plan • Components Focal Points Edge Stabilization Bank Stabilization 1 Path System Promontories

1 SECTORS 33 • Sector 1 The Plateau • Sector 2 Road 1 • Sector 3 Jupiter Street • Sector 4 Willow Close • Sector 5 Wildl ife Island I • Sector 6 Wharf Road • Sector 7 Spillway ,I • Sector 8 Georges Hall Bay Point APPENDIX 54 • Report 1 • Report 2 ------

0 ~ (.) to t:Ij t:Ij c... (.) -- Z ::l t:Ij ...... t:Ij ,.. () 0 ~ ..., ::t> ...... ~ <: t"" t"" t:Ij a UJ t"" 0 C. () ...,::t> c: ...... n 0z ,.. 0-- ::l [ I GENERAL

I The Department of Public Works Comments on the original Chipping engaged Cox and Corkill Pty Ltd Norton Lake Planning Study have to undertake detailed development been received from a number of plans for the foreshore areas of State Government Departments, local I four of the Precincts outlined in authorities and community gro ups. the 'Master Plan' as proposed in Where possible the recommendations the "Chipping Norton Lake Planning have been included in these plans I Study", October 1977. for Study Area No.1.

These plans are a set of design I guidelines for a possible course of In preparing the plans the following development for the Chipping Norton departments have been consulted: Lake development area. They should I not be construed as inflexible as • Central Landscape Group they will require constant review Government Architects Branch and updating to meet new conditions Department of Public Works in a continuing climate of change. I • Soil Conservation Service of The precincts are: I • Precinct 1 • National Parks and Wildlife Chipping Norton Lake Service (Wildlife Island only) New South Wales State Fisheries I • Precinct 3 • Lansvale Residential Community This consultation resulted in two significant working reports : I • Precinct 9 Georges Hall Bay • Vegetative Stabilization (Georges Hall Bay Point only) Chipping Norton Lake Scheme I Stage 1 • Precinct 10 . Soil Conservation Service of I Georges Hall Lake Front New South Wales • Vegetation Survey Chipping Norton Lake Scheme Central Landscape Group I Department of Public Works New South Wales. I \ \ . 11.. .•..- -'I , ,

,~~ ",.~,- . "-,. " '\. I ~r";~::~ .. :.

-.,.

3 r ::a m 0 m '0 W[][)Wrn[l] G') en '0 a...... en (') ..... CD P.l CD 3 C 0 .....I. - < () ~. - a. '0 CD ::E 0 0 0 7 '< 0 P.l ::::l ..... ~ 0 en '< a...... Z OJ CD '0 - ..... P.l 0 0 CD a. 3 ..... P.l :t> OJ CD '< a. Z ..... ::::l en r ::::l 0 ..... 0 c P.l -P.l 0 a. .., P.l r- 3 3 a. ro cr CD en r- CD OJ 0'"~- ..... - om ...... t- oo 0 0 I OBJECTIVES

I This report proposes detailed plans for Study Area No. 1. The specific I components of the plans are; • public access to the lake front from the l ocal streets I • land utilization of the foreshores • public parking are as and linking I path system I • wildlife and pres ervation areas ~ a • promenade areas and locations 0° 0;. .:: ,,:0 tlo ~ d • for the visual enjoyment of the .~~. 0:-. :::. .:: o ., lake I '.,:. ~~ "':::'0- • landing and launching areas for I boats • a landscape programme to main­ tain and supplement the existing plant species (including recom­ I mendations outlined by the Soil Conservation Service and the Department of Public Works .... ~ I - . ": .....~ Central Landscape Group) • a method for stabilizing the I existing river bank (using information provided by the Department of Public Works I Coastal Engineering Branch) I I 6 I I I

LANDSCAPED TERRACE

WATER LEVEL WALKWAY

JETTY I I I I chipping 4°., norton I IJ" I) 0 .... c:,. e: (;) - : . ",~" 0 0 lake

I ::" 0" ••••• 0' :t. .... ::{ I MASTER PLAN EXISTING CONDITIONS I BANK CONDITIONS , I STUDY AREA No.1 Precinct 1 Chipping Norton Lake ~ .f."'.- I (Wildlife Island only) Precinct 3 I Lansvale Residential Community Precinct 9 Georges Hall Bay (Georges Hall Bay Point only)

Precinct 10 Georges Hall Lake Front

8 I MASTER PLAN

LANSI/ALE t---1 chipping norton lake development area [D study area number 1

._ /_._ . :..:.:.:....b.trr~ y:) -~-~- =_;I~ ~~ "

~- ..::;'-

.... , ..... ~}. .~ map 2 '. metres I o 300 600 I l' 1111111 I MASTER PLAN GENERAL SPECIFIC I The Chipping Norton Lake Authority .that the sand extraction agreements .that there should be acquisition of has adopted the 'Master Plan" :' should be coordinated to conform to strategic parcels of land within the which outlines the general parameters the proposed lake configuration Authority's boundary to guide the future development for I the lake and surrounding land. The .that the scheme should be developed .that the northern bank adjacent to following four components are the in stages so that critical parts of the ' Lansvale Residential Community ' key aspects of the scheme: the plan are 'in place' before the be stabilized to arrest the bank I end of the 15 year sand extraction erosion - this could include a • the ultimate shape or configur­ period public walkway along the foreshore a tion of the lake I .that the staging should relate to the .that the proposed island in the • the specific land uses for the proposed development of the precinct s - north east part of t he lake be land and water area each precinct can be developed as rehabilitated as a wild life preserve an entity so that recreational I • the pedestrian path system activity in the lake area can start .that a maintenance programme be immediately organized to keep the lake area • the vehicular access and parking free of debris and garbage I areas • that the plans and proposed develop­ ment should be coordinated by the .that a landscape programme be Authority so that comprehensive, organized to maintain the existing The Chipping Norton Lake Planning compatible development is achieved habitats and create new ones I Study made the following general according to the proposed plans and specific recommendations. This .that a public right-of-way around report deals with the detail plans the lake allow access to the lake I required to implement these specific foreshores. recommendations while carrying out the intent of the general recommend ­ :1 ations. I I

I As described in the "Chipping * Norton Lake Planning Study" October 1977. 10 '\ .'

'.\ \ .,

,

\ J I EXISTING CONDITIONS

I Sand deposits have been extracted from this area for many years, creating a series of water bodies with a total water area of more I that 100 hectares. This represents approximately 70% of the final water area of the proposed lake. However I the water area is fragmented (see map 3) due to ineffective controls and lack of coordination. The 'Mas ter Plan' describes the future shape or I configuration of the lake which the Chipping Norton Lake Authority can I work towards. There are many spits of land that have been left by the past sand I extraction - these need to be 'cleaned' up to make a continuous water area. Except there will be several islands left to provide I relief, interest and wildlife habitats.

Two surveys have been made of the I study area to establish the existing condition and suggest a vegetative stabilization programme. These I studies are reproduced at the end of this report.

Also the Department of Public Works I Coastal Engineering Branch will ,,,,,,,,,,,.:•. ;;:>:::,;,.,, ,,.,j:i·'· " study the water movement in the .. proposed lake and the consequent I ..... type of erosion that can be expected :.:::: .... ;.::: :.: ...... and the mitigating measure s ",', necessary to stabilize the banks I and islands . I 12 I C.N.L.Oevelopment Area EXISTING CONDITIONS

land area

~ water area CD study area number 11 I /i

;1/ _0 ,I

I ,..... I I """"'" I

map 3

metre~ I o 400 800 I l' II II 1:1 II I BAN K CON DITIONS

1 Well used existing access lane. Note: Need to formalise path and landscaping. 2 View to Georges Hall Bay Point from Lansvale residential community. Note: Suffering vegetation due to bank erosion. 3 Occasional widening of existing high level path system. Note: Area used by residents of adjacent properties and indis­ criminate planting

4 East of Georges River Road with Lansvale riverside park in the background. Note: Good panoramic view of lake and island.

5 View from widening end of Jupiter Street towards Warwick Farm river edge. Note: Well used informal walk­ way and gentle bank slope.

6 River edge view across to Georges Hall Lake front and proposed wildlife island. Note: Good stands of trees along foreshores.

DJ[]] mm WWkey 14 BANK CONDITIONS

7 Generous wide high level walk­ way gently sloping down to river bank. Note: Good overall view of lake. 8 Well established top level walk­ way along river. Note: Badly eroded bank and suffering vegetation.

9 Occasionally the walkway system provides closer access to the river edge. Note: Well established vegetation on upper side of walkway. I 10 Gentle bank slope in sectors of the Lansvale residential community precinct. Note: Healthy well settled I vegetation.

11 Panoramic view with island in I the foreground. Note: Badly eroded steep bank.

12 Well used existing walkway along rear of residential community. Note: The proximity and height of fences.

[[]oo[TIC]] DIJeill key 15 ----~-'"~ /I I ---- \ STUDY AREA No1 II \ \ /I -~:" ...~ ~\. ' .. I " II STUDY AREA NUMBER 1 " , > ' l/ifl l '' I "r: I ". .-/'// ),-,, 1f,r , ------~~r- 'j I;i ' 1/ ,> PRECINCTS , r ,,\v~C I ~~ ~~., 1,,7.t .1 .. II I ..... """'" [jjJ [!] CHIPPING NORTON LAKE r " I [2] LANSVALE RESIDENTIAL ""' .... COMMUNITY 1 nua.~ A o GEORGES HALL BAY

~ GEORGES HALL LAKE FRONT o CABRAMATTA CREEK 2 NATURE PRESERVE o LANSVALE RIVERSIDE PARK

u.,,' \. \. L~1l' \. 1. o WARWICK FARM RIVER EDGE ~ .. ". .... /1 /J ~\. \\\~r" ~ (_'\\ I o CIDPPING NORTON \"" ACTIVITY AREA [2] CHIPPING NORTON I PICNIC/PARKING AREA CHIPPING NORTON BAY :",: ~~~~~-"-,,- , ~ , \'t~~ lJ ~ o /. ~ GEORGES HALL 11 ACTIVITY AREA '. ." , -~- .~, '-"1~- ~ \ I .... GEOIIdEs HAlL GEORGES HALL , ~, [2IJ '. II ... , , , j' 12 RESIDENTIAL COMMUNITY I;t! .;,'~o map 4 )!"

' ..." ~ A ,4l -: , metres 1'1 r- ...... ,"",' 1 ... ___ J i 400 800 -- .:a.." a ~ ~( /'~- I 1/ ~ l' II II II II,I PRECINCT NO. 1 I CHIPPING NORTON LAKE (Wildlife Island only) I The proposed Wildlife Island is .a small jetty will be built to This area has been proposed as a located in the main lake area. It provide landing facilities for the wildlife island preserve because: is the largest and most significant study groups I island in the lake which is the .the existing wildlife habitats in central and major attraction of .an intensive planting programme, this area should be protected the scheme. The planning comp­ recommended by the Soil Conser­ onents for the island are : vation Service and the Central .it is the only large area in the I Landscape Group, will be necessary scheme that is free from predators .the existing contours of the island to 'stabilize' the island such as domestic dogs and cats will be reshaped to build it up and I establish salt-free topsoil which .commercial or recreational use will encourage and sustain plant is very difficult as there is no growth bridge for pedestrian access

I .one small section of the island .the soil condition is unsuitable contains important plant species for building that are not commercially avail­ I able (eg common reed 'Phragmites .there is an important swamp area australis' ) and could be an important which contains an important plant source of seed or propagating species (common reed ' Phragmites I material for sowing operations. australis' ) This area will be maintained in its natural state .it is an ideal location for 'controlled' nature study groups to inspect an I .two small bay areas will be island ecological system and developed as wetlands for the wildlife habitat habitat of ducks and other water I birds .this area of land contains deposits of waste material (from the sand extraction) which cannot be re­ .a well articulated loop path system used and must be contained. I will be built to enable school children and nature study groups .it will visually enhance the lake to partake in nature study to have islands which offer relief I excursions. Access to the island to the large body of open water will be limited to this kind of I activity I 17 ------

.'

'" : PRECINCT NO.3 I LANSVALE RESIDENTIAL COMMUNITY I T his precinct is located on high .three residential lots at the ends The planning concept for this area ground adjacent to the lake with of Jupiter Street and Willow Close has resulted from the following fine panoramic views over the should be acquired by the Authority factors: I water and islands. However one - to provide public access with of the major problems in the area limited parking to the focal points .the river bank has received the is the eroded bank which needs around the shore line main planning considerations as immediate attention. Th€ planning it I components of this precinct are: -new plantings should be predominantly indigenous to supplement and rein­ has very serious problems force t he existing native vegetation because of erosion I .four 'focal points' spaced around the foreshores - located at strat­ .park seating and barbecue areas receives the least attention egic public access points to the will be provided at strategic points because of poor vehicular I lake and water edge throughout the park and path access system .a public walkway along the water's .a landscaped buffer zone needs to edge - this is combined with the _the existing property rights of the be created between the residential I placing of rocks at the toe of the landowners will be protected except community and the recreational slope to stop erosion a s a bove . lake I • a public walkway between the top .continuous public access to the lake of the bank and the private houses should be provided around its this higher level path system links perimeter the focal points meandering along I between the trees with impressive .the bank erosion should be panoramic views overlooking the arrested as it threatens the stab­ lake ility of the private houses around I the shore line and decreases the -a series of terraces to stabilize the extent of public right-of-way eroded bank - they will wind around I preserving the existing trees and .the natural vegetation along the vegetation shore line is in need of protection and reinforcement -a continuous public easement I around the waterfront - this will .the separation of public access require acquisition of recreational and path system should be more easements at two locations (part clearly defined so there is no I Lot Z, DP 403574 and part Lot 32, conflict between private use and DP 517846) public use I 19 - -_. ------PRECINCT NO.9 I GEORGES HALL BA Y (Georges Hall Bay Point only)

I The area of this precinct included, The planning concept for this precinct is the northern spit or point of has been determined by the need - land of 'Georges Hall Bay'. It I contains good stands of native .to create an edge or boundary to the vegetation which will be maintained proposed 'Bay' area in a natural state. The planning components are : .to protect and preserve the natural I vegetation along the shore .the spit of land is to protect and visually contain the 'Georges Hall .to stabilize the shoreline and to I Bay' . The edges will require protect the bank stabilization with rocks .to provide a means to improve and aid I .a path will be provided to meander the tidal ventilation of the lake out to the end of the spit .for a public pathway along the shore­ I .along the spit on the northern edge line and out to the end of the proposed small rock promontories will be spit. built out into the water to provide I sitting and viewing areas .the spit will also contain some arrangement which will aid the tidal ventilation of the lake area I if necessary I u I I I

I 21 I PRECINCT NO. 10 GEORGES HALL LAKE FRONT

I This precinct contains several • The Fogolar Furlan Club will be The planning concept for this large properties in private owner­ encouraged to remain in its present precinct has been determined by the ship. The planning components location need - I related to these prope rties are : .Andreasen's Nursery will also be .for a public access and public walk­ .A strip around the water's edge be encouraged to remain and expand as way around the edge of the lake reserved as a recreational ease­ it would become a significant I ment to provide public access to attraction in the area. .for a pedestrian path link to the the water's edge and enable a con­ Mirambeena Regional Park tinuous walkway around the lake. I .to stabilize the shoreline to protect .A strip along Willow Close also be the bank and natural vegetation reserved as an easement to provide I space for the continuation of the • to protect the private property 'Mirambeena-Georges Hall Loop holdings and the desirable existing Trail'. This path system links the uses of the Fogolar Furlan Club and Mirambeena Regional Park with the Andreasen's Nursery I Chipping Norton Lake area. .to provide sitting, viewing and other .A public path (part of the Loop passive recreational areas along Trail) will be constructed along the the shore line for the general public. I water's edge meandering between the trees and existing natural ...... \ vegetation. .. I "\'" • Rock promontories could be built out ." into tfie water to provide sitting and ::::. :\".... . ';'\""'" I viewing spots along this densely treed area.

.The bank will be protected with I rocks which will be placed along the edge. I I I 22 [I . I I I study area I number 1 I

I MASTER PLAN COMPONENTS

I Focal Points I Edge Stabilization Bank Stabilization I Path System ...... -....-...... ,.~ Promontories

I 0 • I ~

, ~ , )- I I • I • -.~fii>• • '. I 23 STUDY AREA MASTER PLAN

The area defined as the Study Area in this report consists of the north Pb.l\.\ S'fSTh\I\ II lP--NS V{)'Gr: lZ~S\DWllAL, CDMM\JNi\f east and south foreshores of the I1lCoH LEVa PA rn ~. proposed Chipping Norton Lake. WA.'f'krz. LEva WlliJlW~Y PJCAL WI!\!1 This area is, except for a few sand spits and the remnants of Epsom ~ :,,.. .;,·c: \".··:"...... ~· ·~ 7r' Road, in the shape of the final lake configuration. Therefore detail plans can be prepared and implemented. i!i\ .• .i\I!I\li l :\; W:8 \: O~ The Study Area Master Plan is Pk1l-l Itl ~ l1l illustrated on map 5. It is a cohesive Ni\RA.M5t;~Nt>. \\\%\:\::::\:\\.\UI::':U\\U\· area with a number of elements in . ~~ the plan that reinforce, define and ··· D ··~.. L,··k·· I·~·· 8.":: " ::::::.,,:...... it '" " link together. The major elements . " ...... , .. ~'\i f(XAl., POI~ are: \·\\:\\\\\\il\\W:.\\.::\\U\nU\\\ • FOCAL POINTS :::. ~ ; ~. ~:': :: : ~ : ::. : : : : ~b~~~ls~ · ~ ::·::::.:\:: ~ .. • EDGE STABILIZATION ~ ~ ~ • BANK STABILIZATION • PATH SYSTEM high level path water level walkway

• PR.OMONTOR.IES l-INlI- TO .... " bEDR'~.A HALl., MtTI\J rN ~[J,t,t.

24 STUDY AREA No1 MASTER PLAN

__ " \ \ 'i CIDPPING NORTON LAKE DEVELOPMENT AREA

I \ ~ ~, ~ "«),.~ \ \~ \ GEORGES RIVER ROAD St: l~ :... '" \ \ \ FOCAL POINT

J ( .&,{ (') { « ?w~ \ ! \ JUPITER STREET ) a.} ; \} j} - > ( FOCAL POINT

lK>(>/>xA6<)<)~" , <1< ' ,\1 THE PLATEAU FOCAL POINT

~~ 'WILLOW CLOSE FOCAL POINT

:~~I---1I--_ WHARF ROAD ;;....:t>I"- FOCAL POINT "'~!:,;~~

GfORGI:S map 5 metres o 100 200 I l' I I I I FOCAL POINTS

Within the Study Area there are These focal points are located at I five access points to the lake fore­ strategic places at the ends of the shore and lakeside pathway system cul-de-sacs which are adjacent to that have been defined as Focal the lake. A limited number of I Points. parking spaces are provided for short term visits - long term and The five points have been given the overnight parking will be restricted. names of : I These areas contain a series of The Plateau Focal Point terraces stepping down to the water • and the proposed water level walk­ I • Georges River Road Focal Point way which at this point has a small Jupiter Street Focal Point jetty for fishing or mooring small • boats. The terraces have been I • Willow Close Focal Point designed as promenade areas with • Wharf Road Focal Point seats, paving and landscaping. These areas will be for passive I recreation - sitting and walking and ~ \(I;,SIOElJllAL.. enjoying the view overlooking the ~ lake and islands. The top terrace ~~u.. I ~t>JJ~ and parking area is approximately 7 metres above high water level which enables fine panoramic views over I W~ThtJ- the lake. ~ CO ~ ~(LM-, e Visually these focal points establish I ~It ~\~T the interest areas along the northern SAG lake shore and on the link between ~(I '1I0Su.., water and land. I ~~ !/ /\/1 '>'[{k/~S ~ # 0) A detailed drawing of the Jupiter fO\klT Street Focal Foint is illustrated on I ~ tj) HOOSE.; Map 6. ~

~ P.6.itl I ~ 6) I 26 JUPITER STREET FOCAL POINT

street trees

screening trees ~ [] individual trees ~ shrubs ~ [0 terrace planting bank stabilization

r=-::-l path c=J Will ground cover • paving I

WALKWAY I '- ROCK EDGE STASILIZATI I map 6 LAKE metres --, I o 5 10 15 I -, :1' I I I I I EDGE STABILIZA TION

Rocks will be placed at the toe of I the slope to stabilize the bottom section of the bank.· This will protect the bank. from wave action I and erosion, it will also provide a water level walkway which will run I continuously around the foreshore.

The profile of the bank is relatively I steep requiring careful placement of the rocks. The rock sizes will be determined by this steepness and I the method employed for dumping. Also the edge rocks will be suitabl y placed to form seating and fishing I spots. WMl;1/, l,~V~L W~LV.W~Y \\ i Hj: ))\·~l~l~ ..~~~l p",nl At the focal points adjacent to the I JSTTY \ access points small timber jetties will be provided for fishing and n .\:. boat mooring.

I The edge line should be varied to Wk"\tJ\ ~:: :: R~ PtiW· ~1 form an irregular shape. This will have several beneficial aspects, I .>:::::/\:;:: 1U8 ffi- l3MJYl they are:

• provide s a maximum shore I <.; ' ;;~jf r;; length for fish habitats • provides a visual relief to the I continuous e dge line.

I • I 28 I BANK ST ABILIZA TION

The bank is eroded and extremely I steep. It needs immediate attention before more areas collapse and I therefore affect. the adjacent houses . . -::::: :':-...... The foreshore will be stabilized by W~1k.fII ) ): UNSTh~l~ ~\Jt,. :::.:::::~:}>::-;::: .. placing rocks at the water's edge I -:-:.CmJDlnrn . '.-:-: :-: ..... '..... (to stop the wave action) and terracing the bank (to stop the I ~ H{} erosion). The gabions would sit on the 'placed' rock at the water's edge and be I terraced up the bank therefore stabilizing the public access and the private property at the top of the KOUSE. bank. The bank is about 7 metres I high and the number of terraces created by the gabions will depend on the location and quantity of the I CkIJ.lof,) exis ting trees. The gabions will 1EVtV,kCkS require careful placement to I preserve the existing trees. ~~)I '-:'+ Casuarina glauca is the dominant WArt,V, If.vu, W~W~y tree on the river bank with a mixing of Casuarinas and Eucalypts I on the bank ridge. New plantings on wm.u, :.... the terraces and top should supple­ ' ment and reinforce existing vegetation .. .-: :.: :::: ~ : :::: .. , ....;. I by use of plant species indigenous to ...... the area . ::', : ~ .. <~::>~:: .. I Access down the bank at the 'Focal Points' will be by a series of steps which link each terrace. The steps will be constructed of natural I materials and designed to fit with the 'soft' character of the terraces and walkways. I 29 TYPICAL CONDITIONS existing

THE SECTION SHOWN IS CHAR­ UNSTABLE BANK ACTERISTIC OF MOST OF THE LANSVALE RESIDENTIAL COMM­ UNITY LAKE FRONT WITH V ARIA TIONS IN BANK STEEPNESS AND HEIGHT.

IN GENERAL, IT FEATURES AN EXISTING NATCRAL PATH AND A MIXTURE OF IKDIGENOCS VEGET­ ATIoN' THE BADLY ERODED BANK BEING THE MAIN PROBLEM AREA.

proposed

THE MAIN OBJECTIVES WITHIN THE PROPOSAL INCLUDE; UPGRADING NATURAL PATH · MAINTAINING EXISTING VEG­ LANDSCAPED TERRACE ETATION AND REINFORCING NATURAL INDIGENOUS VEGETATION · BANK ST ABlLIZA TION WITH WATER LEVEL WALKWAY GABIONS OR ROCKS · STABILIZATION OF WATERS EDGE WITH ROCKS TO MAKE WATER-LEVEL WALKWAY POSSIBLE metres 024 6

30 I I I I I ~Dll3E. PATH SYSTEM I VIEWS SWt£1 There are two continuous path systems rt~nniqg around the foreshore of the Study Area:

I • High Level Path WA.~ There is an existing path running along the top of the bank. It is I proposed that this path be upgra ded but left as a 'natural' path, winding between the trees. New plantings will reinforce the natural indigenous I vegetation so creating a nature path­ way with views and vistas over the I lake. The pathway links the focal points at the top of the bank. It also I collects the minor access routes from the residential streets.

The s uccess of this higher level I walkway will depend on a good bank stabilization programme. At present the bank is unstable and activity on I top of the bank will tend to cause bank collapse.

• Water Level Walkway I The water level walkway will be formed Wf>-T~P. LEVEL on top of the rocks that are placed at the I WMJl..WAY · .~ toe of the bank to stop the erosion ". :',::-::" .":.<:::::.:::,, -:. caused by wave action. . . This wal~ay will provide continuous I access to the water's edge for passing WATh~ . P~ :;~!I:'\~:J} recrea tional activity - fishing, walking, sitting and viewing. It also links the Focal Points which .are the access I ...... location from the residential s treets . >':: . . ... I 31 I PROMONTORIES

Rock promontories will be con­ I structed out into the water to provide a relief to the path that I meanders through the trees . I II PATH I I

I ~""------'---~.-...... -. ------This area of the shoreline is ,r J') densely treed and the proposed path I should not be close to the water's ~ L / edge as it will endanger the / ~ . ~ -. vegetation and bank conditions. It is therefore necessary to provide I points which project out into the water for sitting, fishing and view­ I '- ing of the lake. These promontories are proposed at five spots around the shore and I on the "Georges Hall Bay . Point. " The path, linking the promontories, is part of the proposed "Mirambeena­ I Georges Hall Loop Trail" . I 32 I I I I sectors I -;.

( ~ ' " " . ',." ~ SECTOR 1 The Plateau ...... ;. . ;. " -..:,...... ~...... -.~ SECTOR 2 Georges River Road

SECTOR 3 Jupiter Street

SECTOR 4 Willow Close

SECTOR 5 Wildlife Island I SECTOR 6 Wharf Road SECTOR 7 Spillway I SECTOR 8 Georges Hall Bay P oint

I .' .'::.:::~.::::::;~+( :.:.... :.. :.: ... ~ ~ -... .' .:' ~"""------,

I ", . ·i/\.iJt:!;;fb::;::: .... ',. ~'-. .~ .. ~.~: ... , .' .' I .:.';:.;:";'}:.':.:.;:« ::: ... ' .. '.::. :.. ~: .. '

I 33 I STUDY AREA No1 I SECTOR MAP chipping norton lake development area 1 THE PLATEAU '2 GEORGES RIVER ROAD 3 JUPITER STREET

4 WILLOW CLOSE 5 WILDLIFE ISLAND 3 6 WHARF ROAD 7 SPILLWAY

CHIPPING NORTON 8 GEORGES HALL I BAY POINT LAKE 5 I

I ISL. f>...... ND / •. 17 (~':; ///'--~)' . "",",,;J / ' -- ,~!

..... ' , '-... \ ._-;) I ~.

\ ~'-\~~t\)-. \ .r-::--~~, I L-l------·'1'J>~·~(~I" \'~<; ~~~\' 8 I Iq~.",> _:"".,,\ I ":J ,-\~\'\.> ....,.' C;'0 \ \);):,' ". map 7 GEORGES HALL ~:'--""r ," ...... " metres I BAY , " • " o 100 200 \ , \ \ \ I \ , I I I ,, l' \ I SECTOR 1 THE PLATEAU I This sector extends from the Plateau .the eroded banks will be terraced and Lansvale Riverside Park to with gabions or rock protecting the Cutler Road (see map 8). existing native vegetation and pro­ viding flat areas for additional I The proposed components are planting

.boat launching ramp and associated .a limited number of parking spaces I parking for boat trailers and car will be provided at the end of parking. These facilities are exist­ Cutler Road ing but in need of upgrading particularly the access road to the • a high level path system will comm­ I boat ramp and the parking area. It ence at the plateau and extend along is recommended that this upgrading the top of, the terraced bank and proceed immediately around the shore line adjacent to the I private houses and Lansvale East .a small jetty to be built in associat­ Public School ion with the boat launching ramp. It I will also serve for fishing and .the residential streets - Cutler Road, general enjoyment Kurran Street and the Plateau - need to be planted with street trees • the banks need protection and it is I recommended that the toe of the slope be stabilized by placing sand­ I stone rocks along the edge • a picnic and barbecue area will be developed on the large flat grassed I area directly east of the boat launching ramp

I .the water level walkway begins at the jetty and extends east a'round the shore line. It will be constructed on the rocks that have been placed I at the toe for bank protection 1'1 I 35 ~ S\~'C.'C.\ ¥-\l~~p.~p. . .-.. • •

I

SECTOR 1 I THE PLATEAU

RECREATIONAL EASEMENT I THE PLATEAU FOCAL POINT PICNIC AREA PARKING BANK STABILIZED WITH GABIONS, ROCKS ETC. WATER LEVEL WALKWAY BOAT TRAILER PARKING ROCK EDGE STABILIZATION TRAMP JETTY

map 8 metres . ISLAND. o 25 50 l' \ .\ \ I TYPICAL SECTIONS. section 1

REPRESENTATIVE OF THE PLATEAU FOCAL POINT AREA WHERE THE BANK IS AT ITS WATER LEVEL WALKWAY. MINIMUM HEIGHT THE WATERS EDGE IS ACCESSIBLE BY FOLLOWING THE GENTLE JETTY SLOPE OF THE BANK. AT THIS POINT THE BANK, ALTHOUGH LOW, NEEDS STABILIZATION THUS A VOIDING CONTINUOUS EROSION OF GOOD PARK AREA.

section 2

OCCURS AT THE PICNIC AREA ACCESSIBLE FROM BOTH CUTLER ROAD AND THE PLATEAU. IN THIS SECTOR TWO RELATIVELY LOW BANKS ARE FORMED. BANK STABIL­ IZA TION IS ALSO NEEDED ON THE TOP BANK WHICH SHOWS SOME EVIDENCE OF SURFACE SOIL EROSION. WA TER LEVEL WALKWAY

metres o 2 4 6

37 I I I I I SECTOR 2 GEORGES RIVER ROAD

This sector starts at the First • seats will be provided throughout the I Lansvale Venture Unit and extends area, generally making it a passive around to Cummings Crescent recreation area (see map 9). I • the existing access path from The proposed components are Cummings Crescent will be main­ tained, however it requires planting I .the First Lansvale Venture Unit and paving to make it a desirable occupies an existing facility on the path to the lake shore foreshore. It is considered that this is a compatible use and should be • the adjacent residential streets - I encouraged to expand with the Bundurra Street, Coolah Place, development of a jetty and boat Georges River Road, Cummings launching facilities that would be Crescent - require planting with I advantageous for the Unit's future suitable street trees. operation • the water level walkway, the edge I stabilization, the terraced bank and the higher level path system are a continuation of the same elements I described in the Plateau Sector -/ • the significant part of this sector <9 . F;,0-:...~,__ -:;:;f. ~ I is the 'Georges River Road Focal Point' . This is an area that pro­ vides parking, path access prom­ enade, terraces and steps down to I the water level walkway

.a small jetty will be provided at the I foot of the focal point for ftshing and mooring of small boats I

I ...... :. ... I 38 I KURRARA ST .

private SECTOR 2 property . II GEORGES RIVER RD ~u·~(~ ,2g{j ~~t~{O~:SC:::D TERRACE m \ I ACCESS PATH m~~---'r.t-·- TERRACES BANK STABILIZED WITH GABIONS, ROCKS ETC. JETTY TER LEVEL WALKWAY KEDGE ST ABILIZA TION REA TIONAL EASEMENT

map 9 metres o 25 50 :1' I ·1 I SECTOR 3 JUPITER STREET

This sector runs from Cummings I Crescent to the access path from Riverside Road (see map 10).

I The proposed components are

.the water level walkway, the edge I stabilization, the terraced bank and the high level path system are a continuation of the same elements described in the Plateau and I Georges River Road Sectors.

.also the Jupiter Street Focal Point I has the same type of elements described in the last sector under the Georges River Road Focal Point. It contains access paths, parking, I promenade terraces, and steps down to the water level walkway and jetty

I .the access paths from Mars Place and Riverside Road are basically the same as the Cummings Crescent I access path and are in need of land­ scaping and paving

.the path and bank system pass in I front of the Lansvale East Public School. It is recommended that the • school fence along this section be I J removed and a suitable planting rl : programme be implemented to take I its place ~f .the adjacent residential streets of - " . Mars Place, Jupitor Street, Venus ..t : : ' ~ '.>t:;:;::.:;;·:i·:·: . ;:: ·:;:; i;:;:i:i;::::~::>:::-:::. Place - require planting with I suitable street trees . ' . ~ .. " , I 40 SECTOR 3 JUPITER STREET

-1*1. J -JUPITER STREET FOCAL POINT !:..-~~-- PARKING c..!.... __~!:.....1- __ TERRACES JETTY '< j~< "I BANK STABILIZED WITH GABIONS, ROCKS ETC. "~-----l-r-/~-)~~...,.~+-- WATER LEVEL WALKWAY ~"' ;- ;~ NATURAL LANDSCAPED TERRACES ....V+---/-.'-/ --~-,.If,.".;lJ--- ROCK EDGE STABILIZATION ~ ~:J--ACCESS PATH map 10 metres o 25 50 :1' 1 ·1 I I SECTOR 4 WILLOW CLOSE

This sector runs from the Riverside . the water level walkway will · end at I Road access path to the Willow the Willow Close Focal Point. From Close Focal Point (see map 11). this point south the path system will continue on the top of the bank with­ I The proposed components are in the acquired recreational easement.

. the water level walkway, the edge . the adjacent residential streets - I s tabilization and the terraced bank Riverside Road, Ferry Road, Willow are still a continuation of the same Close - require planting with suitable elements described in the Plateau, street trees. I Georges River Road and Jupiter Street Sectors . the high level path system is not continuous through this sector as . also the Willow Close Focal Point several private properties extend to I has the same elements described in the bank edge. However the bank the Georges River Road Sector. It needs stabilization with the edge contains access paths, parking, rocks and gabion terraces I promenade terraces and steps down to the water level walkway and jetty • along Willow Close and along the . shore line in front of Andreasen's I Nursery the Authority will require a recreational easement of approx­ imately 20 metres which will enable continuous public access to the lake I front. It will also provide an ease­ ment (along Willow Close) for a continuation of the "Mirambeena­ I Georges Hall Loop Trail" I I I I 42 ' ...... \

.~ \\ ".

"'..."...... 1· I8 G'jill ~ .. -f (,:<>,Y(,,-...•.. " .... ""-.'. "<-'. . . .1".,//.• ~i~~~::.(! . ':~ 0""'~ \y,~", keY"'ma: SECTOR 4 WILLOW CLOSE

~~""""'---"---:>'----....,...-:I--WILLOW CLOSE FOCAL POINT ~-~~~~~~-4~--JETTY I .,-+--~";;::;'~~~~+--·PARKING ·j-.~~~~~~~~f---FOOTPATH ~~--~~~~~~--TERRACE :A:;::;:';;"'4---pA TH ~ ~~~S;:8Z7~#.f?5~t--BANK STABILIZED WITH ~ ~~ GABIONS,ROCKS ETC. ~~~~~~-~~+---NATURAL LANDSCAPED TERRACES WILDLIFE f;.--~~~~~~~--ROCK EDGE STABILIZATION ISLAND ::'i¢.~-RECREA TIONAL EASEMENT

I map 11 metres I o 25 50 I I I ,1jf!i~rrJ ~ I SECTOR 5 WILDLIFE ISLAND The area of land at the end of the .a small jetty will be constructed on I remnants of Epsom Road will be the western shore for the landing developed into a wildlife island and of the groups of school children restricted to use by school children I and nature study groups (see map 12) .a well defined path will be constructed around the island to guide the groups to the most interesting nature. study The proposed components are areas. Access will be restricted to I this path system. It is designed as . the island will be reformed to a loop, which will pass through all specified contours while maintaining the different types of environment, I its basic configuration the tidal zone and the flood prone zone. It would also include a 'board . the north and east edge (the old walk' bridge traverSing an interest­ Georges River bank) needs to be ing wetland area. I stabilized with rocks at waters edge . topsoil (as recommended in the Soil Conservation Service report) will be I . the two bay areas on the western used to remould the contours and side will be developed with a enable suitable species to be planted. shallow beach profile and made into I a 'wetland' with the plant;ng of suitable reed :lnd legetation that will encourage and sustain water I fowl . the 'points' and land spits on the western side will be stabilized with I rock placements I I I I 44 ~~ ~- \

SECTOR 5 WILDLIFE ISLAND

PATH

XISTING CONTOURS

NEW CONTOURS

ROCK EDGE STABlLI ZA TION

PLANTING

map12 metres o 25 50 :1' 1 ·1 1 I WILDLIFE ISLAND PLANTING TREES

The following plant species have All three species would be I been recommended by the Soil planted in each specified area. Conservation Service and the The indicated species would be Department of Public Works the dominants pe cie s in the s pe c - I Central Landscape Group. Refer ified area. to map 12 - 'Wildlife Island' for the numbered location of species. 1 Casuarina Glauca (Swamp Oak) 2 Eucaliptus Botryoides (Bangalay) I The basic concept is to intensely plant the total area of the island 3 Acacia Glaucescens (Coast Myall) with the three major tree species I (certain areas would have a dominant species). SHRUBS I The path system would be left These species would be located ~, unplanted to enable nature study throughout the treed areas. ",,0., groups to enjoy the island. Acacia Floribunda (White Sally) I ..;J ." (; Leptospermum Flavescens ~ I .... ' (Common Tea Tree) ~ WETLAND I 4 Phragmites Australis (Common Reed) 5 Aegiceras Corniculatum I (River Mangrove)

I GROUND COVERS

These two species would be loc­ I ated throughout the specified areas. 6 Cynodon Dactylon (Couch) I 7 pteridium Esculentum (Bracken) •....•. .•.•:: :;: ...••...... •.;::: ....:> I .. :.::::.:.?\.. :: ...... :. ..; ... ,.. .:::\, ...... ::. 46 I SECTOR 6 WHARF ROAD

This sector runs from Willow .west of Wharf Road the path system I Close Focal Point to Wharf Road will tontinue into the proposed Focal Point (see map 13) park system and picnic area

I The proposed components are .the adjacent residential streets - Wharf Road, Hollywood Drive - .the path system continues within require planting with suitable I the proposed recreational ease­ street trees ment which runs around the shore in front of a series of large .Andreasen's Nursery and the privately owned properties. It is Fogolar Furlan Club will be I recommended that this easement encouraged to expand and become be acquired an integral part of the lake planning scheme I .the path will meander through the existing vegetation which is in • at two points around the shore it good condition and only needs is proposed that rock promontories I supplemental planting of native be constructed out into the water. species and good maintenance These promontories will provide sitting and viewing areas and act as a relief for walkers and bike I .,./ riders

• the Wharf Road Focal Point I contains a limited number of parking spaces, promenade terrace, and steps down to a rock I promontory I I I I 47 I -

WILDLIFE ISLAND

SECTOR 6 WHARF ROAD

~ ".: : ;.:...... >. . " ',', . ::...... , " ./ " WHARF ROAD FOCAL POINT ,. "" "'" RECREA TIONAL EASEMENT ,.. ~ NATURAL BANK ".. . PROMONTORY ~ ""'~ ROCK EDGE STABILIZATION , "'" TERRACES ...... ~ PARKING I ~ ~ PATH

I map 13 metres I o 25 50 I l' I ·1 I TYPICAL SECTIONS.

PROMENADE section 3

LANDSCAPED TERRACE FAIRLY TYPICAL OF THE WHOLE SECTOR FROM CUTLER ROAD TO THE LANSVALE EAST WATER LEVEL WALKWAY PUBLIC SCHOOL AREA WITH VARIA TIONS IN STEEPNESS JETTY AND HEIGHT OF THE BANK. BOTH TOP LEVEL AND WATERS EDGE WALKWAY ARE A CONSISTENT FEA TURE.

section 4

THE RELATIVELY LOW BANK PROFILE OF THE AREA NORTH OF WHARF ROAD FOCAL POINT CONCENTRATES ACTIVITY ON THE TOP WALK­ WAY SYSTEM WHICH IN THIS CASE IS MADE POSSIBLE BY A RECREATIONAL EASEMENT.

ROCK T ERRACES ACCESS TO THE WATERS EDGE IS PROVIDED BY PROM­ EDGE STABILIZATION ONTORIES BUILT FROM THE MAIN ROCK EDGE STABILIZ­ ATION SYSTEM. metres o 2 4 6

49 I I I I I SECTOR 7 SPILLWAY ...... ••.. -. I .. This sector covers the spillway ":'" par t of the Georges Hall Bay P oint :( ..... "'. (see map 14) .:...... ,~. I . t .. ,_- ~J.)~O The propo sed components are .. ~o • ...... _t... .~. . the spillway system will be I designed to enable a flow of water between the main lake area and Geol'ges Hall Bay. The Depart­ ment of Public Works Coastal I Engineering Branch will determine the most suitable method for achieving proper tidal ventilation I of the bay

• a path will be constructed across I the spillway to provide access to the Georges Hall Bay Point

. rock promontories similar to the I Wharf Road sector will be constructed on either side of the "'~\. point ' ~'. I .~~": \::: • the edges of the point will need to ... ,..... ,\,'." .. ~~."'., ....}\,., .... ;;' be stabilized with rock as I described in the other sectors . the path and picnic areas will be located to fit p ith existing veget­ I ation, however supplemental planting will be required to strengthen the proposed open area I and treed area I I 5 0 J -.. ..-. t . .] ~> -'- ,J //o' ., (:~

~ t·-.- ~\: ' '"

SECTOR 7 SPILLWAY

ROCK EDGE STABILIZATION

Y \:1 ,'.,..,( I PATH -

• _u___ GEORGE --- HALL aAV ',.1 -. map 14

• ~Gn·,_ ·metres o 25 50 '.,. , l' I I I I SECTOR 8 GEORGES HALL BAY POINT

This sector extends from the I spill way along to the end of the point (see map 15) I The proposed components are .the point contains good stands of I natural vegetation which will be preserved and protected by stabilizing the edge in the same I :. :.. /.':: :~.: : ' .}' : way as described earlier • a path will be constructed along ' ,' " . .-. the point as a continuation of the I path system described in the preceding sector

.rock promontories similar to the I one s in the Wharf Road and the ~pillway sector will be constructed I on the lake side of the point I I I

~ ;.'.. :; ';' '.' .l -I :)rpl r I • ':'. r i:~· y} :i!:. -:[:. ;;:, ii: I I 52 II·:· ti;:.<:.

I~ bA~i :::"' ISthND .... -.

.... -

I 'Y- ... : SECTOR 8 .:.:...... :-:: :.jij :iI. T GES :1 ';/ ~ 'Y'>' J0,-t - BAY POINT I} ... -...... ~'" ROCK EDGE ST ABILIZA TION ~> PATH ~;1 PROMONTORY

-t )~

- ~\ L:} -'r map15 metres o 25 50 :1' I I ! I I I G)",,' I ~ •IJ~ appendix C> a ~ I .~ ~ REPORT 1

I Soil Conservation Service of NSW I Vegetative Stabilization .January 1978

Chipping Norton Lake Scheme I Stage 1 I REPORT 2 I Central Landscape Group Department of Public Works of NSW I Vegetation Survey January 1978

I \" ....:. ::: ...... :~ . : ..: . ...:.:: ::. .: :...... :: .:: ...... " ... :::::::...... :: ::\ .... ::::: ...... , .....::: :.. .': :' Chipping Norton Lake Scheme I I 54 I I REPORT 1 I • VEGETATIVE STABILIZATION

I CHIPPING NORTON LAKE SCHEME I STAGE 1

-I 23RD JANUARY 1978

I SOIL CONSERVATION SERVICE OF NEW SOUTH WALES I I I I I I I 55 I

I INTRODUCTION

This report examines briefly the I , vegetative stabilization requirements of the first stage of the Chipping I Norton Lake Scheme. The area of concern is divided into I two zones • River Bank (i) Flood Prone Zone I (ii) Flood Free Zone • Island I (i) Tidal Zone (ii) Flood Prone Zone

I The principal limitations to the establishment of vegetation, a list of recommended species, and special I requirements for successful establishment are given for each zone. I The density and location of tree and shrub plantings have not been considered and are left to the I discretion of the developing authorities. I I

56 I , I

I RECOMMENDATIONS

River Bank : Topsoil should be applied where I the clay subsoil is exposed, (i) Flood Prone Zone especially where ground cover Limitations species are to be sown or planted. Approximately 3-5 cm of topsoil I This zone is prone to slumping will greatly improve the chances when the vegetation is removed, of establishing ground cover and in places is naturally unstable. II species. I The major limiting factors are the extremely steep slopes and All areas sown to or sodded with heavy clay soil. These two grass should receive an annual I factors are especially important dressing of a complete (N:P:K) along the northernmost bank of fertiliser at 250 kg/ha rate for the proposed lake. the first three years.

I Recommended Species A surface mulch should be applied The recommended tree, shrub after all sowing operations on and ground cover species, with areas of steep slopes, and the I comments where appropriate, mulch be tied to the surface with are given in Appendix 1. twine and pegs. The type of mulch and method of location will I depend on the situation and the Requirements facilities available. If grass sod Success in establishing a pro·· is used, mulch protection is tective vegetative cover in this unnecessary. I zone cannot be expected unless excessively steep slopes are Because of the unstable nature of reduced to a stable configuration these steep slopes and the diffic­ I (on some of these slumping has ulties likely to be experienced recently occurred) and the toes with revegetation, it is essential of the slopes are adequately that the existing vegetation be I protected against the erosive disturbed as little as possible. action of both the tide and waves • I generated by wind or river craft.

I 57 1 1

1 (ii) Flood Free Zone Island Limita tions (i) Tidal Zone 1 There are few limitations to establishing vegetation in this Limitations zone, other than the quality of This zone is subject to tidal the soil material. action, salt water and the 1 erosive action of waves generated Recommended Species by wind or river craft.

'I The recommended tree, shrub and Recommended Species ground cover species are given in Appendix II. Depending on exposure, steep bare batters may require some 1 form of mechanical stabilization, ~equirements such as gabions, prior to planting. Topsoiling will be necessary 1 where the clayey subsoil has been exposed. At least five (ii) Flood Prone Zone centimetres of topsoil are 1 necessary. Limitations An initial dressing of a complete Artificially prepared sites may (N:P:K) fertilizer at 250 kg/ha have a high salt content (up to 1 rate should be made to all areas 14 mS/cm at 250 C) if river sown to grass. Thereafter, annual sludge has been used. Such levels dressings of complete fertilizer of salt will severely restrict the at 125 kg/ha rate should be made establishment and survival of 1 for the following three years . salt sensitive plants, and may even affect the establishment and I growth of salt tolerant plants. 1

I 58 I I I The following is a guide to the Recommended Species effects of various salt concen­ The recommended species are trations in the soil : given in Appendix 1.

I Requirements Ms/cm (250 C) Effect Topsoiling will be necessary I where the soil material contains o - 2 Salinity effects usually high levels of salt. The depth of negligible topsoil required will depend on the species to be sown, ~. g . I 2 - 4 Yield of very salt sensitive 10- 20 cm depth for ground cover plants restricted species, 50-100 cm depth for 4 - 8 Yield of salt sensitive plants canopy species. I restricted Where tops oiling is not practical, 8 - 16 Only salt tolerant plants salt tolerant species only should I yield satisfactorily be planted. 16 Only a few salt tolerant crops yield satisfactorily As the salt-affected island fill is relatively coarse-textured, move­ I ment of water down through the Good quality topsoil, free of profile will leach excess salts to salt or other contaminates, of a lower levels. Consequently, top­ I loamy sand to sandy loam soiling should be delayed until texture should be used. just prior to sowing thereby allowing the rainfall to leach the I salt from the surface layers . All areas sown to grass should receive an annual dressing of a I complete (N:P:K) fertilizer at 250 kg/ha rate for the first three years. Areas sown to native trees and shrubs should receive an I initial dressing of a slow release complete fertilizer at a rate of 250 kg/ ha. I 59 I I SPECIAL CONSIDERATIONS ACKNOWLEDGEMENT

A number of stable areas with good Grateful acknowledgement is made to I vegetative cover are contained within Mr D Benson, Royal Botanic Gardens, the first stage of the Lake Scheme. for his assistance in identifying the local flora. I Because of their stable condition, their importance as a source of seed for the colonization of disturbed areas, I the difficulty in revegetating areas of steep slopes and clayey or salty soils, and the time required to achieve a mature vegetative cover, these vege­ I tated areas should be disturbed as little as possible. Their continued existence is important as it will I ensure a continuing supply of seed for the natural regeneration and coloniz­ I ation of disturbed areas. Any development or landscaping should be designed around these I areas. One such important area occurs on I a proposed island at the end of Epsom Road. This area contains a number of species that are not commercially available e. g. common I reed (Phragmites australis) and could be an important source of seed or propagating material for I sowing operations. I

I 60 I APPENDIX I RECOMMENDED SPECIES

I RIVER BANK - FLOOD PRONE ZONE ISLAND - FLOOD PRONE ZONE SALT SPECIES COMMENTS I TOLERANT I Dominant Species ,~ Swamp oak (Causuarina glauca) Yes This is frequently the dominant tree species between high tide and maximum flood levels and. therefore. should be the principal canopy species I planted. Major Associated Species * Bangalay (Eucalyptus botryoides) Yes I " Coast myall (Acacia glaucescens)

Minor Associated Species I Backhousia myrtifolia For cool moist situations Polyscias sambucifolius ~ , Yellow tea-tree (Leptospermum flavescens) I ':' White sally (Acacia floribunda) Acacia parramattensis Hop bush (Dodonaea triquetra) I Cumbungi (Typha orientalis) For areas of standing water Ground Covers I Clematis aristata *",< Kennedia rubicunda * Couch grass (Cynodon dactylon) Yes For general sowing. or sod including tidal zone. " Buffalo grass (Stenotaphrum secundatum) Yes Both species are ideal for recreation areas I provided they are mown regularly. Establishment by sod is normal for buffalo and sod or seed of I Kikuyu can be used.

* Species available from New South Wales Forestry Commission I Tree Nurseries or commercial seed firms. ** Seed may be available from native plant nurseries. I 61 I APPENDIX II RECOMMENDED SPECIES I RIVER BANK - FLOOD FREE ZONE SPECIES COMMENTS

I Rough-barked apply (Angophora floribunda) Forest red gum (Eucalyptus tereticornis) Broad-leafed ironbark (E. fibrosa) I Grey box (E. moluccana) Coast myall (Acacia glaucescens) White sally (A. floribunda) I Ground Covers Couch grass (Cynodon dactylon) Sod or seed. Buffalo (Stenotaphrum secundatum) Mowing is advisable if these species are sown in I Kikuyu (Pennisetum cladestinum) recreation areas. Buffalo establishes by sod, kikuyu can be established by either sod or seed.

I NOTE All these species are available from New South Wales Forestry Commission I Tree Nurseries or commercial seed firms.

I APPENDIX III RECOMMENDED SPECIES ISLAND TIDAL ZONE

I SPECIES COMMENTS

I * Couch grass (Cynodon dactylon) Sod or seed. * Buffalo (Stenotaphrum secundatum) Mowing is advisable if this sod species is used in recreation areas. Common reed (Phragmites ) Amphibious, providing an excellent habitat for wildlife I and acting as a buffer to potentially erosive wave action. River mangrove (Aegiceras corniculatum) I * Species available from commercial seed firms

I 62 REPORT II

VEGETATION SURVEY

CHIPPING NORTON LAKE SCHEME

9TH JANUARY 1978

CENTRAL LANDSCAPE GROUP DEPARTMENT OF PUBLIC WORKS OF NEW SOUTH WALES

63 I I INTRODUCTION VEGETATION TYPES I This report has been prepared by the A general sequence of vegetation Central Landscape Group, Government types occurs; proceeding from the Architects Branch, who were com­ lake, inland, the sequence is : missioned as consultants by W J Kerle I (Principal Engineer), per V E Zvirbulis • River Bank Vegetation - (Project Engineer, Chipping Norton is domina ted by Casuarina Lakes Authority) from the Coastal glauca with a ground cover of I Engineering Branch, Civil Engineering exotic grasses Division. • Bank Ridge Vegetation - has a mixture of trees including I A vegetation survey has been com­ Casurina glauca, Eucalypts, pleted of the Northern Area, North­ Angophoras and Acacias with a East Area, and the Island Area of shrub layer and a ground cover the proposed Chipping Norton Lake of exotic grasses I (Figure 1). In this report a eeneral description of the vegetation types is • Hinterland Vegetation - given; how these vegetation types most of the natural vegetation I relate to each of the above areas; has been removed, however, a and a detailed list of the plants number of original Eucalypts growing in each area. remain with mown grass below. I 1·/::'1 NORTHERN AREA contains River Bank Vegetation All these three vegetation types do and Hinterland Vegetation not occur continuously but rather occur in different combinations. I There are three different areas. 1.;:-.;.:'" NORTH-EAST AREA These are: contains River Bank Vegetation Northern Area I and Bank Ridge Vegetation • • North-East Area Island Area I ~ ISLAND AREA • I contains River Bank Vegetation

I 64 I I NORTHERN AREA The Northern Area is located on the north bank of the lake along Silver­ water Crescent. There are two I vegetation types present - river bank vege tation and hinterland vegetation - I (Figure 2). Plant species include I Trees - • Casuarina glauca (Swamp Oak) I • Eucalyptus botryoides (Bangalay) • Eucalyptus bauerana (Blue Box) I • Acacia glaucescens (Coast Myall) Vegetanon ~Rlv: Bank Vegetation • Acacia decurrens (Green Wattle) Shrubs I I' I ~·I ~J i IUI!!i'! I~ • Acacia floribunda t t ~ . .i 111~ ) ~, (,~ I'~''/I 111 il'~'I,Z~ " 1 .· Ir~! I (Il~l* If!.~r~ Ground Covers - .'VI#; 'I thf ~d, ~ .: II/ f. Ilf • Lomandra longifolia ..... , i8&t1t " J« f 1; !f it ." vt¥,; ( , tFU I I I • Phebalium squamulosum • Cynodon dactylon (Couch) I approxImate scale I : 20 fiGURE 2. I I

I 65 I NORTH-EAST AREA I North East Area extends east along Introduced Trees ,- the lake from Cutler Road to Wharf Ligustrum sinese (small- leafed • 4 Road. The area consists of a steep Privet) river bank with the associated I vegetation and Bank Ridge Vegetation • Populus alba (White Poplar) "l (Figure 3). Erythrina indica (Coral Tree) I Bank BOl1k Vegetc:dlon • Casuarina glauca is the cominant • Cinnamomum camphora (Camphor tree on the river bank with a mixing Laurel) of Casuarinas and Eucalypts on the Opuntia bergeriana (Prickly Pear) bank ridge. A number of introduced • I trees exist in the area which have escaped from the surrounding gardens. Shrubs - Exotic grasses also grow which in • Exocarpus cupressif ormis I some patches have become the main (Native Cherry) ground cover. • Phebalium squamulosum I Plant species include • Melaleuca decora i\1 ,III fl Trees - Melaleuca styphelioides (Prickly­ U'~ ,II, • leafed Tea Tree) I I ~11 ~II • Casuarina glauca (Swamp Oak) li\Ii/I'."~ ,~ \l l ili/~' • Angophora subvelutina (Broad­ Ground Cover - \l 11)'tj,\",i1; I leafed Apple) lid .. . ~ Cynodon dactylon (Couch) I • Acacia glaucescens (Coast Myall) • • Pennisetum clandestinum ---.....r~~ • Eucalyptus tereticornis (Forest (Kikuyu Grass) Red Gum) I Tradescantia albiflora • Pittosporum undalatum • approxlmcrl-e. !':>cale I: 20 FIGURE 3 I (Pittosporum) I I I 66 ISLAND AREA CONCLUSION

I -----Flif-- A~ea ------The proposed island in the north- The retention of the existing native >r River Bonk Ve~~totlon east corner of the lake forms the III, II ;J vegetation will prove vital for "III 111 11\ III third area. The vegetation is of the success in the design of the overall ,hll 'I' ~ Iii I I \'It ~ iii (',lUI ,llld River Bank type (Figure 4), and is scheme. I' "if ,~\,.(" 'I~ restricted to a strip along the ,1\1' II~ II, ',/ 1/1 i~ I J. " 11111 III Ilf 1\ eastern side. The dominant tree is New plantings should supplement and 1/ n ":1,1 IV I~ ~III,~ , I III "~J Itil Casuarina glauca with a few Eucalypts reinforce existing vegetation by use I ~ IIJ"/', _~ 111II )./JJ. ' of the higher ground. of plant species indigenous to the 'I}'I./ ("'1\ ,'III I/II:f, ,/11, 1(11,_ area. __- _____... ..' I ..:" ~ "'\~ll 111I ( d,ll/V WI I ~ ...... -.....­ ~ I app-toxlmcrte 5G-ole I : 20 FIGURE. 1- _ I Plant species include Trees - I • Casuarina glauca (Swamp Oak) • Eucalyptus botryoides (Bangalay) I • Acacia glaucescens (Coast Myall) Shrubs - I • Acacia floribunda • Leptospermum flavescens I Ground Covers - • Cynodon dactylon (Couch) I • Fteridium esculentum (Bracken)