39

Appendix D

Stormwater Management Plan

Bunbury Forum Shopping Centre Development Application - Proposed Retail Expansion

40

LIGHTPOLE

LIGHTPOLE

LIGHTPOLE

LIGHTPOLE

LIGHTPOLELIGHT

POLE

LIGHTPOLE

LIGHTPOLE

LIGHTPOLE

BOLLARDS

BOLLARDS BOLLARDS BOLLARDSBOLLARDS

BOLLARDS

LIDS

292.1

50

BINPLASTIC GRATE

PIT DIA 1.1

0.98

1.00

1.0

2 1.6691.654

1.9

83

1.6231.585

1.9

27

2.08

2.062

2.08

2.043

2.033

2.011

1.99

2.091

1.949

1.919

1.531 1.3411.891

1.711

1.851

1.651

1.067

1.007

1.137

1.005

1.075

0.945

1.012

0.889

1.009

1.10

9

1.44

0

1.42

3

1.48

5

1.494

1.593

1.252

1.17

2

1.197

1.441

2.21

2.0

7

1.98

1.9

65

1.6

21.5

8

1.7

2

1.388

1.3

66

1.366

1.337

1.2

78

1.278

1.1

98

1.448

1.1

88

0.996

0.9

66

1.082

1.0

57

0.589 0.5990.608

0.648

0.8840.884

0.87

4

I.L

1.2

2 (

75

0 D

IA)

I.L

. 1

.07

(7

50

DIA

)I.

L 2

.51

(1

00

DIA

)

I.L

1.0

6 (

55

0 D

IA)

I.L

. 2

.55

(1

00

DIA

)

0.24 IL

0.27 IL

0.2

5 IL

PIT DIA 1.3mPIT DIA 1.3m

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3

SQUAREPIT

1.3 E-W1.6 N-S

SQUAREPIT

1.6 E-W1.3 N-S

DIA 1.05

SQUARE

PIT

1.6 E-W

1.3 N-S

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3PIT DIA 1.3

SQUARE PIT1.15

SQUARE

PIT DIA 1.3

PIT DIA 0.85

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 0.9

PIT DIA 1.25

PIT DIA 1.25

PIT D

IA 1

.1

PIT DIA 1.1

250

DIA

.S

TO

RM

WA

TE

R

150 DIA

.

ST

OR

M

WA

TE

R

400

DIA

.S

TO

RM

WA

TE

R

500 DIA.

STORM

WATER

500 DIA.

STORM

WATER

300 DIA.STORMWATER

300 DIA.STORMWATER

500 DIA.

STORMW

ATER

750 DIA

. STO

RM

WA

TER

250 DIA.STORM WATER

250

DIA. S

TORM W

ATER

250

DIA

.S

TO

RM

WA

TE

R

250

DIA

.S

TO

RM

WA

TE

R

600

DIA

.S

TO

RM

WA

TE

R

900 DIA. STORM W

ATER

900 DIA

. STO

RM

WA

TER

1050 DIA

. ST

OR

M W

AT

ER

350 DIA.

STORM

WATER

250 DIA.

STORM

WATER

1250

DIA

. STO

RM

WA

TER

100 DIA.STORMWATER

150 DIA

.

STO

RM

WA

TER

150 DIA

.

STO

RM

WA

TER

150 DIA

.

STO

RM

WA

TER

150 DIA. STORM WATER

130 DIA.STORMWATER

500 DIA. STORM W

ATER

25

0 D

IA.

ST

OR

M W

AT

ER

25

0 D

IA.

ST

OR

MW

AT

ER

350 DIA.STORMWATER

350 DIA.STORMWATER

350 DIA.STORM WATER

100 DIA.STORMWATER

HYDRANT

LIGHTPOLE

X D

XX D

XX D

X

X D X

X D

X

X D

X

X D

X

X D XX D X X D X

X D X

X D

X

X D

X

X D

X

X D

XX D

XX D

XX D

XX D

X

X D X

250 DIA

.

STORM WATER

900 DIA.

STORM

WATER

400 DIA.

STORM

WATER

400

DIA

. STO

RM

WA

TER

250 DIA. STORM

WATER 300 DIA. STORM WATER

300

DIA

.S

TO

RM

WA

TE

R

250 DIA. STORM WATER

25

0 D

IA.

ST

OR

MW

AT

ER

40

0 D

IA. S

TO

RM

WA

TE

R

15

0 D

IA.

ST

OR

M W

AT

ER

PITDIA0.95

PIT DIA1.0

I.L

. 1

.72

(15

0 D

IA)

LIGHTPOLE

BOLLARDS

BOLLARDS BOLLARDS

LIDSBINPLASTIC GRATE

PIT DIA 1.1

1.2521.441

1.7

2

1.388

1.3

66

1.366

1.337

1.2

78

1.278

1.1

98

1.448

1.1

88

0.996

0.9

66

1.082

1.0

57

0.589

0.5990.608

0.648

0.8840.884

0.87

4

I.L

1.2

2 (

75

0 D

IA)

I.L

. 1

.07

(7

50

DIA

)I.

L 2

.51

(1

00

DIA

)

I.L

1.0

6 (

55

0 D

IA)

I.L

. 2

.55

(1

00

DIA

)

0.24 IL

0.27 IL

0.2

5 IL

PIT DIA 1.3

PIT DIA 0.85

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 0.9

PIT DIA 1.25

PIT DIA 1.25

PIT D

IA 1

.1

250

DIA

.S

TO

RM

WA

TE

R

150 DIA

.

ST

OR

M

WA

TE

R

400

DIA

.S

TO

RM

WA

TE

R

500 DIA.

STORM

WATER

500 DIA.

STORM

WATER

300 DIA.STORMWATER

300 DIA.STORMWATER

500 DIA.

STORMW

ATER

X D

XX D

XX D

X

X D X

X D

X

X

D

XX D

X

X D XX D X X D X

X D X

X D

X

X D

X

X D

X

X D

XX D

XX D

XX D

XX D

X

X D X

400 DIA.

STORM

WATER

250 DIA. STORM

WATER 300 DIA. STORM WATER

30

0D

IA.

ST

OR

MW

AT

ER

250 DIA. STORM WATER

25

0 D

IA.

ST

OR

MW

AT

ER

40

0 D

IA. S

TO

RM

WA

TE

R

15

0 D

IA.

ST

OR

M W

AT

ER

PITDIA0.95

PIT DIA1.0

I.L

. 1

.72

(15

0 D

IA)

Civil And Structural Consultants

BPA Engineering

PRELIMINARY DRAWING

A ISSUED FOR DA 03.08.18 AC

PROVIDE CONNECTION

POINT FOR NEW BUILDING

EXISTING SHOPPING

CENTRE ROOF

CATCHMENT

∅525 D

IA STOR

MWATE

R

PROPOSED

CAR DECK

CATCHMENT

INDICATIVE EXISTING

STORMWATER DRAINAGE PIPE

FROM SURVEY INFORMATION AND

INFERRED FROM CITY OF BUNBURY

AS CONSTRUCTED INFORMATION

LEGEND

900 DIA. STORMWATER

∅525 DIA STO

RMWAT

ER

SITE OU

TLET

SITE OUTLET

∅1050 D

IA S

TORMWATER

SITE O

UTLET

LOT 6

8

NO CH

ANGE

IN

IMPER

VIOUS

AREA

CATC

HMEN

T

AREA

=3332m

2

LOT 69

LOT 63

SHOPPING CENTRE

EXISTING CONNECTION

POINT TO BE RE-USED

LOCATE EXITING ROOF

DRAINAGE CONNECTION AND

RE-ROUTE TO SUIT TYP.

STORMWATER DRAINAGE NOTESLOCAL AUTHORITY: CITY OF BUNBURY

EXISTING SITE CONDITIONS

· GROUNDWATER EXPECTED APPROX 1m BELOW SURFACE.

· HIGH GROUNDWATER LEVELS AND SITE LEVELS RESULT IN DEVELOPMENT NOT

BEING CONDUCIVE TO STORMWATER INFILTRATION.

· EXISTING CONNECTION POINTS TO CITY SYSTEM TO BE RE-USED.

· ANY MODIFICATIONS TO EXTERNAL STORMWATER DRAINAGE SYSTEM TO BE

APPROVED AND CARRIED OUT TO THE SATISFACTION OF THE CITY OF BUNBURY.

· EXISTING OVERLAND FLOW PATHS TO BE MAINTAINED.

WATER QUANTITY MANAGEMENT

· POST DEVELOPMENT FLOWS SHALL NOT EXCEED PRE-DEVELOPMENT FLOWS UP

TO AND INCLUDING THE 100 YEAR EVENT.

· SOFT LANDSCAPING CHANGE IN AREA ACCOUNTS FOR APPROXIMATELY 0.5%

(-400m2) OF TOTAL LOT AREAS

· PROPOSED DEVELOPMENT DOES NOT MATERIALLY INCREASE IMPERVIOUS AREAS.

REFER CATCHMENT INFORMATION TABLE.

WATER QUALITY MANAGEMENT

· PROVIDE GROSS POLLUTANT TRAPS AT CONNECTIONS PRIOR TO DISCHARGING

INTO CITY SYSTEM. REFER PLAN FOR INDICATIVE LOCATIONS.

· THE 1 YEAR ARI EVENT "FIRST FLUSH" RECEIVES SECONDARY TREATMENT PRIOR

DISCHARGE TO CITY SYSTEM.

EXISTING NORTHERN CATCHMENTS ARE ROUTED

SOUTH AND DISCHARGE TO SANDRIDGE ROAD

CONNECTION TO CITY SYSTEM TYP.

REMOVE DRAINAGE FROM UNDER

PROPOSED BUILDINGS TYP.

EXISTING STORMWATER UNDER

NEW BUILDING ENVELOPE TO BE

REMOVED TYP. NEW

STORMWATER DRAINAGE PITS

AND PIPES TO BE PROVIDED TO

CONNECTION POINT.

ALLOW TO

ADJUST/REPLACE

EXISTING PITS

NEW PITS AND PIPES FOR

PROPOSED ACCESS WAY TO

BE ROUTED TO PENNANT

ROAD CONNECTION POINT

CURRENT SITE CONNECTION

POINT TO CITY SYSTEM TO BE

RETAINED

OVERLAND FLOW PATH

LOT 70

EXISTING ABOVE GROUND

PARKING DRAINAGE LINES

TO BE REMOVED

PROPOSED CAR DECK CATCHMENT AREA

EXISTING ROOF CATCHMENT AREA

ADDITIONAL ROOF CATCHMENT AREA

EXISTING

PARKING

CATCHMENT

PROVIDE CONNECTION

POINT FOR NEW BUILDING

PROPOSED STORMWATER DRAINAGE MANAGEMENT PLANSCALE 1 : 500

INDICATE LOCATION OF

NEW PIT. CONNECTION

POINT TO CITY SYSTEM.

INDICATIVE LOCATION OF GROSS

POLLUTANT TRAP AND HYDROCARBON

REMOVAL SYSTEM.

TREATMENT PRIOR TO CONNECTION TO

CITY SYSTEM.

INDICATIVE LOCATION OF GROSS

POLLUTANT TRAP AND HYDROCARBON

REMOVAL SYSTEM.

TREATMENT PRIOR TO CONNECTION TO

CITY SYSTEM.

BUILDING FFL 3.10

PENNANT ROAD

SAND

RIDGE

ROAD

STRICKLAND STREET

INDICATIVE STORMWATER

DRAINAGE TO SUIT NEW BUILDING

ENVELOPE. ALLOW FOR PIPING TO

BE ROUTED TO EXISTING ROAD

CROSSING TO CITY SYSTEM.

CONNECTION POINT FOR

HYDRAULIC CONSULTANT.

ROOF PARKING CATCHMENT.

CONSTRUCT NEW PITS

OVER EXISTING. REMOVE

REDUNDANT PIPE.

PIPED CONNECTION OF

NORTHERN CATCHMENTS

TO BE REINSTATED TYP.

SITE BOUNDARY

CAR DECK FLOWS TO BE APPROPRIATELY

SPLIT BETWEEN THE TWO WESTERN EXISTING

CITY CONNECTIONS TO MAINTAIN

PRE-DEVELOPMENT FLOWS.

FUTU

RE

PAD S

ITE

INDICATIVE LOCATION OF GROSS POLLUTANT

TRAP AND HYDROCARBON REMOVAL SYSTEM.

TREATMENT PRIOR TO CONNECTION TO CITY

SYSTEM.

CONNECTION POINT FOR

HYDRAULIC CONSULTANT

ROOF PARKING CATCHMENT

PROPOSED STORMWATER DRAINAGE PIPE

EXISTING STORMWATER DRAINAGE PIPE

TO BE REMOVEDX D X

PROPOSED ALTERATIONS TO

EXISTING ROOF CATCHMENT AREA

PROPOSED PRIMARY AND SECONDARY

TREATMENT SYSTEM. DETAILS AND

SIZES TO BE CONFIRMED

ADJUST DRAINAGE TO

SUIT PROPOSED SITE

B ISSUED FOR DA 23.08.18 AC

PROP

OSED

PAD S

ITE

∅375 DIASTORMWATER

BUILDING ON PILES. FOOTPRINT

OVER EXISTING ∅900 STORMWATER

PIPE TO BE CONFIRMED.

MAIN LIN

E

MAIN

LINE

MAIN

LINE

60.99

8.5

43.5

97.67

40.19

18.19

20.05 62.9

8.77

22.72

106.6

7

95.2

9

20.61

70.7

8

197

31.33 39.67 42.25 26.77 293.38 104.7

8.5

70.0

7

ATM's

(77 m²)

TAP

TAPS

TAP

HY

DR

AN

TS

VALVE

WM

FIRE MAINFIRE MAIN

LIGHTPOLE

LIGHTPOLE

LIGHTPOLE

LIGHTPOLE

LIGHTPOLE

LIGHTPOLE

LIGHTPOLELIGHT

POLE

LIGHTPOLE

LIGHTPOLE

LIGHTPOLE

BOLLARDS

BOLLARDS BOLLARDS BOLLARDSBOLLARDS

BOLLARDS

-0.5

8

-0.47

-0.24

-0.48

-0.64

-0.47

WOOLWORTHS

CENTREMANAGEMENT

WOOLWORTHSLIQUOR

SERVICE

STORE/UTILITY

SERVER/ FILE ROOM

EXTERNAL WALL

BIG W

Concrete

Paving

STRICKLAND STREET

SANDRIDGE

ROAD

33(33 m²)

46(7

0.43

m²)

45(105.6 m²)

48/49(211 m²)

50(140 m²)

47(80.37 m²) 43

(45.92 m²)

PROGRESSIVE IGASHOP 40

41/42(130 m²)

TO

ILE

TS

39(31.5 m²)

38(39.9 m²)

37(44.8 m²)

36(62 m²)

34/35(69.9 m²)F

IRE

ST

AF

F T

OIL

ET

S

MALL MALL

MALL MALL

EXTERNAL WALL

30(30 m²)

1 & 2(198 m²)

3(72 m²) 4

(81 m²)

5(9

0 m

²)

6(9

0 m

²)

7(9

6.2

m²)

8 & 9(138 m²) 1

0(7

2 m

²)

11(126 m²)

12(76.2 m²)

13(150 m²)

14(108 m²)

15(88 m²)

17(119 m²)

18

A(5

7.5

m²)

19(50 m²)

20

(10

0 m

²)

20A(202 m²)

20

B(9

0.6

m²)

21

(14

3.5

m²)

21A(95 m²)

22 & 30(279 m²)

24

(10

5.7

m²)

25(47 m²)

26(71 m²)

27 & 28(103 m²)

29(69.6 m²)

29B(20 m²)

70

69

63

67

MALLMALL

MA

LL

FFL3.20 A.H.D.

Hydrant

Booster

Grate

Gra

te

Gra

te

Grate

Pennant R

oad

Vehicle Ramp

Stairs

Foot Ramp

ExistingBuilding

Pennant Road

STEPTRANSFORMER

LIDS

292.1

50

BINPLASTIC GRATE

PIT DIA 1.1

0.98

1.00

1.0

2

0.853

1.7

65

1.7591.6691.654

1.9

83

1.6231.585

1.9

27

PIT DIA 1.3m

2.244

2.226

2.263

2.08

2.062

2.08

2.043

2.033

2.011

1.99

2.091

1.949

1.919

1.531 1.3411.891

1.711

1.851

1.651

1.067

1.007

1.137

1.005

1.075

0.945

1.012

0.889

1.009

1.10

9

1.44

0

1.42

3

1.48

5

1.494

1.593

1.252

1.17

2

1.197

1.441

2.21

2.0

7

1.98

1.9

65

1.6

21.5

8

1.7

2

1.388

1.3

66

1.366

1.337

1.2

78

1.278

1.1

98

1.448

1.1

88

0.996

0.9

66

1.082

1.0

57

0.589

0.5990.608

0.648

0.8840.884

0.87

4

I.L

1.2

2 (

75

0 D

IA)

I.L

. 1

.07

(7

50

DIA

)I.L

2.5

1 (

10

0 D

IA)

I.L

1.0

6 (

55

0 D

IA)

I.L

. 2

.55

(1

00

DIA

)

0.24 IL

0.27 IL

0.2

5 IL

PIT DIA 1.3mPIT DIA 1.3m

PIT DIA 1.3m

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3

SQUAREPIT

1.3 E-W1.6 N-S

SQUAREPIT

1.6 E-W1.3 N-S

DIA 1.05

SQUARE

PIT

1.6 E-W

1.3 N-S

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3

PIT DIA 1.3PIT DIA 1.3

SQUARE PIT1.15

SQUARE

PIT DIA 1.3

PIT DIA 0.85

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 1.1

PIT DIA 0.9

PIT DIA 1.25

PIT DIA 1.25

PIT D

IA 1

.1

PIT DIA 1.1

250

DIA

.S

TO

RM

WA

TE

R

150 DIA

.

ST

OR

M

WA

TE

R

400

DIA

.S

TO

RM

WA

TE

R

500 DIA.

STORM

WATER

500 DIA.

STORM

WATER

300 DIA.STORMWATER

300 DIA.STORMWATER

500 DIA.

STORMW

ATER

750 DIA

. STO

RM

WA

TER

250 DIA.STORM WATER

250

DIA. S

TORM W

ATER

250

DIA

.S

TO

RM

WA

TE

R

250

DIA

.S

TO

RM

WA

TE

R

600

DIA

.S

TO

RM

WA

TE

R

900 DIA. STORM W

ATER

900 DIA

. STO

RM

WA

TER

1050 DIA

. ST

OR

M W

AT

ER

350 DIA.

STORM

WATER

250 DIA.

STORM

WATER

1250

DIA

. STO

RM

WA

TER

100 DIA.STORMWATER

150 DIA

.

STO

RM

WA

TER

150 DIA

.

STO

RM

WA

TER

150 DIA

.

STO

RM

WA

TER

150 DIA. STORM WATER

130 DIA.STORMWATER

500 DIA. STORM W

ATER

25

0 D

IA.

ST

OR

M W

AT

ER

25

0 D

IA.

ST

OR

MW

AT

ER

25

0 D

IA.

ST

OR

MW

AT

ER

350 DIA.STORMWATER

350 DIA.STORMWATER

350 DIA.STORM WATER

100 DIA.STORMWATER

100 DIA.STORMWATER

100 DIA.STORM

WATER

300 DIA. STORM WATER

HYDRANT

LIGHTPOLE

1 .50

1. 50

1 .501. 50

1. 501 . 50

1 .50

1 .50

1.75

1 .75

1.75

1. 751 . 75

1. 75

1.7

5

1 .75

2.00

2 .00

2.0

0

2. 00

2 .00

2. 00

2. 00

2 .00

2 .00

2 .00

2.002. 0 0

2. 00

2. 00

2.2

5

2.2

5

2.25

2. 25

2.2 5

2.25

2.25

2.25

2. 25

2.2

5

2 .25

2 . 25

2. 25

2.25

2.2

5

2.25

2.2

52 .25

2.25

2.2

5

2 . 252.2 5

2 .25

2 .2

5

2 .25

2.25

2. 25

2.25

2 . 25

2.5

02

. 50

2 . 50

2.50

2.5

0

2 . 50

2 .50

2.5

0

2.5

0

2 .50

2 .50

2

.50

2.5

0

2. 50

2.50

2 . 50

2 . 50

2.

502 .50

2.50

2.5

0

2.50

2 .50

2.50

2.50

2 .502 .50

2 .50

2 .50

2 .50

2 . 50

2 . 502. 50

2. 502 . 50

2.50

2.5

0

2 .50

2 . 5

0

2 .50

2

.50

2 .50

2.5 0

2 . 5

0

2.50

2 .50

2.5

0

2. 50

2 .50

2.50

2.

5 0

2. 50

2.50

2.75

2. 75

2 .75

2. 75

2 . 7 5

2.7

5

2 . 75

2. 75

2 . 75

2.

75

2 .75

2 . 75

2 .75

2. 75

2 .75

2. 7

5

2.7

5

2.7

5

2.7

52

. 75

2.75

2.

75

2.7

5

2 .75

2. 75

2.7

5

2.7

5

2 .75

2.7

5

2.75

2

.75

2 . 75

2.75

2. 7

5

2 .75

2 .75

2 . 75

2 .75

2 .75

2.75

2. 75

2.75

2.75

2 .75

2 .752. 75

2 . 7

5

2. 7

5

2.7 5

2 .75

2. 75

2. 7

5

3.00

3.00

3. 0 0

3 . 00

3. 00

3 .00

3. 003 .00

3.00

3 .0

0

3.00

3. 00

3.

00

3 .0

03. 00

3. 003 . 00

3. 00

3 .00

3.00

3 . 00

3.0

0

3 .00

3 .003 .00

3. 00

3

.00

X D

X

X D

X

X D

X

X D X

X D

X

X D

XX D

X

X D X

250 DIA

.

STORM WATER

900 DIA.

STORM

WATER

400 DIA.

STORM

WATER

400

DIA

. STO

RM

WA

TER

250 DIA. STORM

WATER 300 DIA. STORM WATER

300

DIA

.S

TO

RM

WA

TE

R

250 DIA. STORM WATER

25

0 D

IA. S

TO

RM

WA

TE

R

40

0 D

IA. S

TO

RM

WA

TE

R

15

0 D

IA.

ST

OR

M W

AT

ER

PITDIA0.95

PIT DIA1.0

I.L

. 1

.72

(15

0 D

IA)

60.99

8.5

43.5

97.67

40.19

18.19

20.05 62.9

8.77

22.72

106.6

7

95.2

9

20.61

70.7

8

197

31.33 39.67 42.25 26.77 293.38 104.7

8.5

70.0

7

PROP

OSED

EXP

ANSI

ONtrolley lock up

Civil And Structural Consultants

BPA Engineering

PRELIMINARY DRAWING

A ISSUED FOR DA 03.08.18 AC

LEGEND

LOT 69

OVERLAND FLOW PATH

PROPOSED STORMWATER DRAINAGE CATCHMENT PLANSCALE 1 : 1000

PENNANT ROAD

SAND

RIDGE

ROAD

STRICKLAND STREET

∅1050 OUTLET INDICATIVE

CATCHMENT AREA

∅525 OUTLET INDICATIVE

CATCHMENT AREA

∅375 OUTLET INDICATIVE

CATCHMENT AREA

LOT 70

LOT 63

OUTLET

NUMBER

CITY CONNECTION

PIPE SIZE

INDICATIVE

PIPE GRADE

ESTIMATED

CAPACITY

(l/s)

INDICATIVE

CATCHMENT AREA

(m2)

ESTIMATED OUTFLOW 1

YEAR - 1 HOUR (l/s)

ESTIMATED 10 YEAR

15 MIN FLOW (l/s)

1 ∅375 1 / 105 150 6300 32 131

2 ∅525 1 / 160 400 17000 86 355

3 ∅1050 1 / 800 1200 51300 260 1070

STORMWATER DRAINAGE SYSTEM SITE OUTLETS

No. 3

∅1050 OUTLET

No. 2

∅525 OUTLET

No. 1

∅375 OUTLET

PROPOSED CAR DECK CATCHMENT AREA

EXISTING ROOF CATCHMENT AREA

ADDITIONAL ROOF CATCHMENT AREA

PROPOSED ALTERATIONS TO

EXISTING ROOF CATCHMENT AREA

NOTEFLOWS AND CAPACITIES ARE ESTIMATES ONLY AND BASED ON SURVEY DATA AND AS

CONSTRUCTED INFORMATION. VALUES SHOWN TO BE CONFIRMED DURING DETAILED

DESIGN. EXISTING SITE OUTLET DETAILS TO BE CONFIRMED WITH THE CITY OF BUNBURY.

B ISSUED FOR DA 23.08.18 AC

APPROXIMATE CATCHMENT AREAS

CATCHMENTEXISTING

AREA (m2)

NEW AREA

(m2)

CHANGE IN

AREA (m2)

LOTS 63, 69 AND 70 COMBINED

ROOF CATCHMENTS

SHOPPING CENTRE ROOF 25470 21350 -4120

DETACHED BUILDINGS ROOF

CATCHMENTS2260 1570 -690

PARKING CATCHMENTS

SHOPPING CENTRE CAR DECK 3030 17290 +14260

ON-GRADE PARKING 39200 30150 -9050

OTHER CATCHMENTS

SOFT LANDSCAPING 1382 982 -400

LOT 68 (NO CHANGE)

IMPERVIOUS AREA 3332 3332 0

TOTAL 74674 74674

LOT 68