21

21

21

21

22

22

22 22

22

22

22

22

22

23

23

2323

2323

23

23

23

23

23

23

23

23

23

23

23

24

24

24

24

24

24

24

24

24

24

24

24

24

24

25

25

25

25

25

25

25

25

25

25

25

25

25

25

26

26

26

26

26

27

27

27

27

28

28

28

29

29

29

30

30

31

31

32

1 2 3 4

5

6

7

8

9

10

11

1213

14

15

16

17

1819

20

21

22

23

2425

26

27

28

2930

31

32

33

34

35

36

37

FUCH

IA C

T

DRYANDRA AVEEL

KHOR

N CT

BERRIGAN DR

HOVEA CTFU

CHIA C

T

STRIN

GYBA

RK AVE

2.141m (FILL) MAX

2.141m (FILL) MAX

-2.141m (CUT) MAX

LEGEND

KEPPEL BLOCK ® RETAINING WALL

EARTHWORKS FOOTPRINT

ALLOTMENT EARTHWORKS (FILL) TO BE CARRIEDOUT AS PART OF ROAD CONSTRUCTION

FIGURE 1120-ROL2: Allotment Bulk Earthworks/Retaining26/11/18 Rev 2

ABN 271 158 351 663

PH: 1300 220 195


PROPERTY DESCRIPTION:LOT 821 SP262542SURVEY DATUM:PM134434 E246136.104 N7418132.636MGA ZONE 56; RL33.070 AHDCONTOURS 0.5m FIN. SURF. POSTALLOTMENT EARTHWORKS

E:\Jobs C

urrent\F

orest P

ark S

t16 (G

1802-10)\A

cad\P

roduction\G

1802-10-R

OL2 (B

ulk E

thw

ks).dw

g, R

OL-2, 26/11/2018 12:41:01 P

M

stenhousek

New Stamp

21

21

21

21

22

22

22 22

22

22

22

22

22

23

23

2323

2323

23

23

23

23

23

23

23

23

23

23

23

24

24

24

24

24

24

24

24

24

24

24

24

24

24

25

25

25

25

25

25

25

25

25

25

25

25

25

25

26

26

26

26

26

27

27

27

27

28

28

28

29

29

29

30

30

31

31

32

1 2 3 4

5

6

7

8

9

10

11

1213

14

15

16

17

1819

20

21

22

23

2425

26

27

28

2930

31

32

33

34

35

36

37

H.

V .

H

.

V

. H.

V

.

H .V.

H

.

V

.

H.

H.

H.

H.

H.

H.

..

V

. V.

V

.

V

.

V.

V

. V

.

....

..

W

W

W

W

.WW

.

W

W

W

W

W

W

W

W

W

W

W

.

..

W

.

W

W

W

W

W W

W.W.

W

.W

.

W

.

W

W

W

W

W W

W

.W

.

70

..

70

..

70

..

70

..

70..

70..

70

..

70

.

.

70

..

70

.

.

70

..

70

..

70

. .

70

..

70

.

.70

..E

.

.

E

..

E

E

.

E

E

.

E

E

.

E

E

.

E

E

.

E

E .

E

E

.

E

E

.

E

E

.

E

E

.

E

E

.

E

E

.

E

E

.

E

E

.

E

E

.

EE

.E E

.

EE

.

FUCH

IA C

T (5.5/16)

DRYANDRA AVE (7.5/16)EL

KHOR

N CT

(5.5/

16)

BERRIGAN DR (7.5/16)

STRIN

GYBA

RK AVE (7

.5/16)

HOVEA CT (5.5/16)

LEGEND

150∅ WATER MAIN; CONNECTION TO LOT (W);HYDRANT(H); VALVE (V)

UNDERGROUND ELECTRICAL, ALLOTMENT SERVICETURRET (E), STREET LIGHT (70W)

PROPOSED SEWER; MANHOLE,

EXIST SEWER TO BECOME REDUNDANT/REMOVED

INTER-ALLOTMENT ROOF WATER DRAINAGE PIT &PIPE

ROAD GULLY PIT & DRAINAGE PIPE

7.5/16 MINIMUM NOM PAVEMENT WIDTH/MINIMUM ROADRESERVE WIDTH

KERB & CHANNELFLUSH KERBKERB & TRAY

KEPPEL BLOCK RETAINAING WALL; MAX HEIGHT 1m

CONNECTION TO EXIST SERVICES (COLOUR CODED)

LEGAL POINT OF DISCHARGE/OUTLET1

v

E

W150

S

W H V

E E70

Sv

1

2

3

4

5

v v

v

v

v

EXIST SEWER CONNECTS(DIVERTS UCQ FLOWS)

EXIST CHANNEL CONCRETE INVERT

PROPOSED CULVERTCROSSING (Q100 CAPACITY)

EXIST SEWAGE PUMP STATION

FIGURE 1120-ROL3: Preliminary Infrastructure Details26/11/18 Rev 2

ABN 271 158 351 663

PH: 1300 220 195


PROPERTY DESCRIPTION:LOT 821 SP262542SURVEY DATUM:PM134434 E246136.104 N7418132.636MGA ZONE 56; RL33.070 AHDCONTOURS 0.5m FIN. SURF. POSTALLOTMENT EARTHWORKS

E:\Jobs C

urrent\F

orest P

ark S

t16 (G

1802-10)\A

cad\P

roduction\G

1802-10-R

OL3 (Infrastructure).dw

g, R

OL-3, 26/11/2018 12:41:06 P

M

stenhousek

New Stamp

1 2 3 4

5

6

7

8

9

10

11

1213

14

15

16

17

1819

20

21

22

23

2425

26

27

28

2930

31

32

33

34

35

36

37

FUCH

IA C

T

DRYANDRA AVEEL

KHOR

N CT

BERRIGAN DR

FUCH

IA C

T

STRIN

GYBA

RK AVE

21

21

21

21

22

22

22 22

22

22

22

22

22

23

23

2323

2323

23

23

23

23

23

23

23

23

23

23

23

24

24

24

24

24

24

24

24

24

24

24

24

24

24

25

25

25

25

25

25

25

25

25

25

25

25

25

25

26

26

26

26

26

27

27

27

27

28

28

28

29

29

29

30

30

31

31

32

22

2323

21.9

21.9

22.1

22.1

22.2

22.2

22.3

22.3

22.4

22.4

22.5

22.6

22.6

22.722.7

22.822.8

22.922.9

23.123.1

23.2

23.223.3

23.4

23.5

23.5

23.6

23.7

24.124.1

24

DETAILS PROVIDED ON THIS PLAN ARE AN ONGOING UPDATE OF THOSE PROVIDED FOR THE PREVIOUSSTAGES IN THIS ESTATE COMMENCING WITH THE ORIGINAL FLOOD STUDY CARRIED OUT IN 2001 & DETAILED INTHE N G GARDNER REPORT TITLED TECHNICAL REPORT NO. 2 FLOOD STUDY 669 NORMAN ROAD LOT 65 ONSP104433 REFERENCE G101/1 REV2. THE CURRENT UPDATE REMODELS THE CATCHMENT USING THE LATEST2D FLOOD MODELING TECHNIQUE & THE RESULTS HAVE BEEN CORRELATED WITH OTHER RECENT FLOODMODELLING CARRIED OUT BY -· ROCKHAMPTON REGIONAL COUNCIL 2014 FLOOD STUDY CARRIED OUT BY AURECON & UPDATED 2018.· VDM CONSULTING HYDRAULIC IMPACT ASSESSMENT MASTERS DEVELOPMENT.MODELLING2D HYDRAULIC MODELING; AR&R RAINFALL IFD DATA & TEMPORAL PATTERNS; XPSTORM COMPUTER PACKAGE· LAURENSON ROUTING METHOD· LAND USAGE RESIDENTIAL· LOSS MODELS - UNIFORM LOSS & SEPARATE IMPERVIOUS AND PERVIOUS AREAS. PERVIOUS AREAS

INITIAL LOSS 0mm, CONTINUING LOSS 2.5mm/hr; IMPERVIOUS AREA INITIAL & CONTINUING LOSS 0mm.

LEGEND - WATER DEPTH

FSL RL25.5

FSL RL25.1

FSL RL25.0

Q100 INUNDATION AREA. REFER DEPTH LEGEND

CULVERT 3/3600x1200 BOX CULVERT;Q100 CAPACITY NO ROAD OVERTOPPING

FSL RL23.0

LEGEND

KEPPEL BLOCK ® RETAINING WALL

FINISHED SURFACE LEVELS POST ALLOTMENTBULK EARTHWORKS (0.5m INTERVAL)

Q100 FLOOD LEVELS (0.1m INTERVAL)

MINIMUM ALLOTMENT LEVEL ADJACENTCHANNEL

AREAS OF ADDITIONAL FILLING ASSOCIATEDWITH ROADWORKS

23

24.1

FSL RL25.5

FIGURE 1120-ROL4: 1 IN 100 Year Channel Inundation Mapping26/11/18 Rev 2

ABN 271 158 351 663

PH: 1300 220 195


PROPERTY DESCRIPTION:LOT 821 SP262542SURVEY DATUM:PM134434 E246136.104 N7418132.636MGA ZONE 56; RL33.070 AHD

E:\Jobs C

urrent\F

orest P

ark S

t16 (G

1802-10)\A

cad\P

roduction\G

1802-10-R

OL4 (Q

100 F

lood M

ap).dw

g, R

OL-4, 26/11/2018 12:41:13 P

M

stenhousek

New Stamp

1 2 3 4

5

6

7

8

9

10

11

1213

14

15

16

17

1819

20

21

22

23

2425

26

27

28

2930

31

32

33

34

35

36

37

21

21

21

21

22

22

22 22

22

22

22

22

22

23

2323

2323

23

23

23

23

23

23

23

23

23

23

23

24

24

24

24

24

24

24

24

24

24

24

24

24

25

25

25

25

25

25

25

25

25

25

25

25

25

26

26

26

26

26

27

27

27

28

28

28

29

29

29

30

30

31

31

32

EXISTING REED BED; AVE BED SLOPE 0.8%; AVEVEGETATION HEIGHT 0.5m; REFER PHOTO.

1

2

3

4

5

BERRIGAN DR

HOVEA CT

FUCH

IA C

T

DRYANDRA AVE

ELKH

ORN

CT

STRIN

GYBA

RK AVE

AVE 30m

EXISTING FORMED 'NATURAL' CHANNEL

REED BED

FIGURE 1120-ROL5: Storm Water Management - Quality26/11/18 Rev 2

ABN 271 158 351 663

PH: 1300 220 195

EMAIL:[email protected] DESCRIPTION:LOT 821 SP262542SURVEY DATUM:PM134434 E246136.104 N7418132.636MGA ZONE 56; RL33.070 AHD

TABLE 2: TARGET WATER QUALITY OBJECTIVES (WQO)

Load Reduction(ref QWQG)

Indicator % ReductionTotal Suspended Solids (TSS) 85

Total Nitrogen (TN) 45

Total Phosphorus (TP) 60

Litter, Gross Pollutants (GP) 90

TABLE 3: PERFORMANCE EVALUATION - POLLUTANT MEAN CONCs (mg/L)

TSS TN TP

PRE & POST COMPARISON PRE POST PRE POST PRE POST

At Nominated Receiving Waterscombined wet & dry flows 8.26 0.652 0.245 0.066 0.028 0.006

TABLE 4: PERFORMANCE EVALUATION - POLLUTANT MEAN ANNUAL LOAD (kg/yr)

TSS TN TP

PRE & POST COMPARISON PRE POST PRE POST PRE POST

At Nominated Receiving Waterscombined wet & dry flows 1690 132 17.90 14.10 3.49 1.21

TABLE 5: PERFORMANCE EVALUATION - POLLUTANT REDUCTION (%)

TSS TN TP GP

At Nominated Receiving Waters

combined wet & dry flows

95 57 79 >90

Complies with Table 2 frequency

requirements.

TABLE 1: DESIGN AREAS (ha) (COLOUR CODED TO MATCH PLAN VIEW)

Outlet Total Roof Roads Ground level1 1.352 0.300 0.425 0.6272 0.678 0.180 0.060 0.4383 0.915 0.180 0.282 0.4534 0.574 0.150 0.061 0.3635 0.714 0.180 0.209 0.325

TOTAL 4.233 (100%) 0.990 (23%) 1.037 (24%) 2.206 (52%)

2. OPPORTUNITIES, CONSTRAINTS & PRECEDENTSThe type of development complies with the Council standards for Residential subdivisional works. Thisdevelopment is the continuation of a staged development.The principal pollutants likely to be generated from the site development will be hydrocarbons, metals,sediment and nutrients such as nitrogen and phosphorus fixed to the sediments.· Existing previously constructed stages include underground storm water drainage collection systems

sized for a 1 in 10 year design storm incorporating in-line SQUIDs sized for the ultimate catchmentarea(s) (Humeceptors ®);

· Road and allotment layout and sizing, soil types and functionality requirements precludes thepractical and feasible use of large scale above ground SQUIDs (vegetated swales; bioretention beds;wetlands) installed in the road verge area;

· Council in recent times have indicated a preference for the use of low maintenance self sustainingnatural storm water quality improvement devices such as swales. This stage discharges to anexisting formed 'natural' channel constructed as part of the previous upstream stages. Thischannel is fully vegetated and includes an extensive reed bed within the base; and

· Council can adopt and set storm water quality targets different to the those recommended in theState Planning Policy if considered more appropriate to the the site and available opportunities andconstraints.

4. PROPOSED STORM WATER TREATMENTAfter consideration of the available opportunities & constraints & current Council preferences, theselected treatment train shall comprise the use of the existing channel reed bed.In accordance with SPP Appendix 3's AO1.1b, this is considered current best practice reflecting land useconstraints in this case.

3. RECEIVING WATERSThe nominated receiving waterway is is an existing formed 'natural' channel which is part of theSplitters Creek system. Although some infiltration of storm water is likely to occur at the site, use ofgroundwater does not occur downstream of the site. Consequently, only surface water EnvironmentalValues (EVs) and water quality objectives (WQOs) have been identified.

1. REFERENCES STORM WATER MANAGEMENT & HEALTHY WATERWAY REQUIREMENTSThe site based storm water management plan has been based on the following publications andguidelines:· Healthy Waters Music Modeling Guidelines (HWMMG).· State Planning Policy April 2016 (SPP)· Queensland Urban Drainage Manual (QUDM)· Water Sensitive Urban Design (WSUD)· Storm water quality improvement devices are referred to as SQUID's.

5. PROPOSED STORM WATER TREATMENT EVALUATION & SIZINGThe evaluation & sizing of the components proposed and/or adopted for the treatment train has beencarried out using the MUSIC Version 6 computer package and 6 minute rainfall for the period from 1 January1939 to 31 December 2010. The pollutant types and concentrations evaluated for removal are -· gross pollutants (GP);· sediments and dissolved soils, Total Suspended Solids (TSS);· total dissolved nitrogen (TN); and· total dissolved phosphorus (TP).

All catchments have been modeled as 'Urban Residential' split catchments. The split catchment surfacetypes & associated runoff generation parameters; pollutant concentrations and generation parametersapplicable to these type of catchments and surface compositions recommended in Healthy Waters MusicModeling Guidelines have been adopted. Details of these areas are shown in Table 1.

The existing reed bed has been adopted as the most appropriate SQUID to suit the site opportunitiesand constraints. The design parameters adopted for the treatment capacity of the have been selectedfrom the HWMMG publication for swale drains plus a 3mm/hr exfiltration allowance for nutrient uptakeby reeds within the treatment area.

6. PERFORMANCE EVALUATIONDetails of the catchments applicable to this stage are summarised in Table 1. Details of the SPPsuggested target water quality objectives (WQO) for storm water discharging from the site to thereceiving waters based on nutrient load reduction are summarised in Table 2. Details of performance ofthe treatment train measured at the nominated receiving water for the whole of the upstreamcatchments are summarised in Tables 3 to 5. Tables 3 and 4 provide a comparison between the preand post development scenario. Table 5 provides details of the post development pollutant loadreductions for the proposed treatment train and evaluation in relation to target objectives in Table 2

7. CERTIFICATIONAn assessment has been carried out of the impact from this proposed development stage on stormwater quality (comparison between pre and post development loads) and the effectiveness of theproposed site water quality management in meeting the suggested SPP water quality standards forstorm water management and healthy waterways. Details of the nominated standards, comparisonbetween pre and post development pollutant loads & evaluation of the effectiveness of the proposals inmeeting the standards have been provided. Within the limits imposed by the available opportunities andconstraints and existing precedents, the proposed storm water management should provide -· Treatment comparable to the Council approved proposals for existing constructed stages;· An acceptable water quality management strategy that is the best achievable, cost effective and

within community and sensible expectations.

LEGENDDRAINAGE PIPES AND GULLY PITS

LEGAL POINT OF DISCHARGE; DRAINAGESYSTEM OUTLET

CONNECTED CATCHMENT

NOMINATED RECEIVING WATER NODE

3

E:\Jobs C

urrent\F

orest P

ark S

t16 (G

1802-10)\A

cad\P

roduction\G

1802-10-R

OL5 (S

torm

W

ater M

anagem

ent - Q

uality).dw

g, R

OL-5, 26/11/2018 12:41:19 P

M

stenhousek

New Stamp

16A

16C

16B

16D

16C

7

89

1011

12

13

1415

1617

18

1920

2122

23

24

2526

27

28

29

30

3132

3334

3536

37

900

600

600

1

client

Colaaco Pty LtdABN 18 125 353 826

project

Forest Park Stage 16(Stringybark Avenue, Norman Gardens)

sheet no.

plan no. revision1 of 2

6233-16-ROL A

cad file

6233-16-ROL-A

plan of

lga

scale

1:2000 @ A3datum

AHD 0.25m Contours

created

Rockhampton Regional Council

rpd

Lot 821 on SP262542

IMPORTANT NOTE

This plan was prepared to accompany anapplication to Rockhampton Regional Council andshould not be used for any other purpose.

The dimensions and areas shown hereon aresubject to field survey and also to the requirementsof council and any other authority which may haverequirements under any relevant legislation.

In particular, no reliance should be placed on theinformation on this plan for any financial dealingsinvolving the land.

This note is an integral part of this plan.

Reconfiguration Plan1 Lot into 37 Lots + PUL + Balance

(Stage 16)

authoriseddate detailsissueRJKF5-12-2018 Initial IssueA

-- --

07 4927 5199 | [email protected] | 132 Victoria Parade, Rockhampton QLD 4700

0m 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300m

stenhousek

New Stamp

EXIST CHANNEL - rockhamptonregion.qld.gov.au

Documents

Transcript of EXIST CHANNEL - rockhamptonregion.qld.gov.au