Proposed Site LayoutPeterborough Aerodrome Upgrade

FIGURE 4500122

0 25m 50m

UPGRADEDRUNWAY

08/26

LEGENDAIRSIDEDEVELOPMENTAREALANDSIDE/AIRSIDEDEVELOPMENTAREALANDSIDEDEVELOPMENTAREA

APRON135.0m

x50.0m

TAXIWAY

10.5mWIDE

ROAD7.0mWIDE

RELOCATED BUILDING10.0m x 13.5m x 4.7m HIGH

BITU

MEN

ROAD

BITU

MEN

ROAD

GRAVEL

GRAVEL

OFFICE COLORBONDHANGER

WATERTANK

20.0m

90.7m

91.2m

57.5m

6.0m

Proposed Hanger Plan (RELOCATED BUILDING)Peterborough Aerodrome Upgrade

FIGURE 5500122

0 25m 50m

AIRSIDE DEVELOPMENT AREA:TAXIWAY APRON

LANDSIDE DEVELOPMENT AREA:ROAD

OFFICE

HANGAR

FENCE

13550

1009

0

2850

3730

RAINWATER TANK

FENCE

2000

0 TO

BOUN

DARY

DP

DP

DP

6800

5400

960

510183036

030

10

150

Proposed Hanger Elevations (RELOCATED BUILDING)Peterborough Aerodrome Upgrade

FIGURE 6500122

0 25m 50m

12

CORRUGATED IRON; COLORBOND PALE EUCALYPTSHEET METAL; COLORBOND PALE EUCALYPT

4 POLYCARBONATE; GREEN5 ALUMINIUM FRAMED GLAZING; GREEN6 F.C. SHEET; PAINTED

3 STRUCTRAL METAL; PAINTED GREEN

1

1 1

1

1 111

1

2

2 2

2 2 3

3 2

26

61

1

2

4

150

5

10240

5

4680

2547

2 303

2850

3533

4680

4680

4000

6800 13550 2850

23200

10090 150 6800135502850

23200

3730 5400960

2547

4000

3533

NGLNGL

NGL NGL

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

6

5

1

.7

82

8

5

°

3

8

'1

0

"

1

5

5

.6

8

9

°3

9

'1

0

"

6

9

1

.6

8

1

0

0

°0

2

'0

0

"

2

9

8

.1

3

9

9

°5

5

'1

0

"

1

8

2

.1

0

9

°5

2

'0

0

"

3

5

6

.4

7

9

9

°3

6

'1

0

"

1

2

1

.9

1

2

9

6

.8

0

5

9

1

.8

0

1

9

0

°2

4

'1

0

"

3

4

6

.

8

1

2

9

4

°

2

3

'1

0

"

3

4

.6

0

9

°5

0

'1

0

"

1

3

1

.6

9

2

7

9

°3

9

'1

0

"

2

2

1

.

5

92

9

4

°

2

3

'1

0

"

/

/

/

W

W

W

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

1

0

1

0

1

1

1

1

12

1

2

13

1

3

1

4

1

4

1

5

15

16

1

6

1

7

1

7

1

8

1

8

19

1

9

2

0

2

0

20

2

0

2

1

2

1

2

1

21

2

2

2

2

2

3

2

3

2

4

2

4

2

5

2

5

25

25

2

6

26

26

26

2

7

2

7

2

7

27

27

27

2

8

2

8

2

8

28

29

2

9

2

9

2

9

30

3

0

30

3

0

3

1

3

1

31

31

3

2

3

2

33

3

3

34

3

4

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

0.00

15.00

30.00

45.00

60.00

75.00

90.00

105.00

120.00

135.00

150.00

165.00

180.00

195.00

210.00

225.00

240.00

255.00

270.00

285.00

300.00

315.00

330.00

345.00

360.00

375.00

390.00

405.00

420.00

435.00

450.00

465.00

480.00

495.00

510.00

525.00

540.00

555.00

570.00

585.00

600.00

615.00

630.00

645.00

660.00

675.00

690.00

705.00

720.00

735.00

750.00

765.00

780.00

795.00

810.00

825.00

826.04

840.00

855.00

870.00

885.00

900.00

915.00

930.00

945.00

960.00

975.00

990.00

1005.00

1020.00

1035.00

1050.00

1065.00

1080.00

1095.00

1110.00

1125.00

1140.00

1155.00

1170.00

1185.00

1200.00

1215.00

1230.00

1245.00

1260.00

1275.00

1290.00

End 1295.42

-15.00

-30.00

-45.00

-53.40 (E

ND

)

-16.72

1258.66

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

APRON 135.0m x 50.0m

TAXIWAY

10.5m WIDE

ROAD 7.0m WIDE

RELOCATEDBUILDING10.0m x 13.5mx 4.7m HIGH

NOTES

REVISION DESCRIPTIONDATEREV DR

CHK APP

1098764321

H

G

F

E

D

C

B

A

www.pmdesign.com.au

Design groupEngineering Solutions

H

G

F

MULTI DISCIPLINE CONSULTING ENGINEERS

223 KOROIT ST, WARRNAMBOOL. VIC. 3280

PHONE: (03) 5564 6888

FAX: (03) 5561 1850

WEB: www.pmdesign.com.au

10987654321

TITLE:

ENGINEER

DESIGNER

DRAWN

DWG No. :

PM PROJECT No. :

CHECKED

APPROVED

DATE

REV

SCALE: @ A1CLIENT:

PROJECT:

SITE PLAN

E

D

C

B

A

AIRSTRIP EXTENSION

ROAD

RICHARD NESSELER

1558 TIMBOON-PETERBOROUGH

PETERBOROUGH

T.GREENING

T.GREENING

KB

W.OTH-326-15

1:2000

C01

TG

TG

29.06.15

29.06.15

29.06.15

ADD SEAL TO FULL LENGTH OF RUNWAY26.04.16A KB

ADD BITUMEN SEAL TO RUNWAY DETAIL15.05.16B KB

ADD CRUSHED ROCK HARDSTAND AREA11.07.16C KB

E

LONGIT. FALL AND OTHER CHANGES FOR PLANNING PERMIT12.06.18D DS

MOVED DRIVEWAY AND TAXIWAY/APRON17.09.18E CW

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

1

5

5

.6

8

9

°3

9

'1

0

"

2

2

1

.

5

92

9

4

°

2

3

'1

0

"

/

/

\

\

\

\

\

\

/

/

/

D

/

/

/

/

/

/

/

/

/

/

1

0

1

1

/

/

0.00

15.00

30.00

45.00

60.00

75.00

90.00

105.00

-15.00

-30.00

-45.00

-53.40 (E

ND

)

-16.72

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

APRON 135.0m x 50.0m

TAXIWAY

10.5m WIDE

ROAD 7.0m WIDE

/

/

/

/

/

/

/

/

/

/

/

1

5

5

.6

8

9

°3

9

'1

0

"

3

5

6

.4

7

9

9

°3

6

'1

0

"

1

2

1

.9

1

/

/

/

/

/

/

/

/

/

/

1

0

1

0

1

1

1

1

1

2

1

2

13

1

3

1

4

1

4

0.00

15.00

30.00

45.00

60.00

75.00

90.00

105.00

120.00

135.00

150.00

165.00

180.00

195.00

210.00

225.00

240.00

255.00

-15.00

-30.00

-45.00

-53.40 (E

ND

)

-16.72

<

<

<

<

<

<

<

<

<

<

<

<

APRON 135.0m x 50.0m

TAXIWAY

10.5m WIDE

ROAD 7.0m WIDE

NOTES

REVISION DESCRIPTIONDATEREV DR

CHK APP

1098764321

H

G

F

E

D

C

B

A

www.pmdesign.com.au

Design groupEngineering Solutions

H

G

F

MULTI DISCIPLINE CONSULTING ENGINEERS

223 KOROIT ST, WARRNAMBOOL. VIC. 3280

PHONE: (03) 5564 6888

FAX: (03) 5561 1850

WEB: www.pmdesign.com.au

10987654321

TITLE:

ENGINEER

DESIGNER

DRAWN

DWG No. :

PM PROJECT No. :

CHECKED

APPROVED

DATE

REV

SCALE: @ A1CLIENT:

PROJECT:

RUNWAY DRAINAGE LAYOUT

E

D

C

AIRSTRIP EXTENSION

ROAD

RICHARD NESSELER

1558 TIMBOON-PETERBOROUGH

PETERBOROUGH

B

A

TG

TG

C03

29.06.15

W.OTH-326-15

E

KB

T.GREENING

T.GREENING

AS SPECIFIED

29.06.15

29.06.15

SWD

ADD SEAL TO FULL LENGTH OF RUNWAY26.04.16A KB

12.06.18D DS LONGIT. FALL AND OTHER CHANGES FOR PLANNING PERMIT

17.09.18E CW MOVED DRIVEWAY AND TAXIWAY

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

1

8

2

.1

0

9

°5

2

'0

0

"

3

5

6

.4

7

9

9

°3

6

'1

0

"

1

2

1

.9

1

2

9

6

.8

0

/

/

/

/

/

/

/

1

0

1

1

1

2

13

1

4

1

5

<

<

<

<

<

<

<

<

<

<

<

<

<

<

<

NOTES

REVISION DESCRIPTIONDATEREV DR

CHK APP

1098764321

H

G

F

E

D

C

B

A

www.pmdesign.com.au

Design groupEngineering Solutions

H

G

F

MULTI DISCIPLINE CONSULTING ENGINEERS

223 KOROIT ST, WARRNAMBOOL. VIC. 3280

PHONE: (03) 5564 6888

FAX: (03) 5561 1850

WEB: www.pmdesign.com.au

10987654321

TITLE:

ENGINEER

DESIGNER

DRAWN

DWG No. :

PM PROJECT No. :

CHECKED

APPROVED

DATE

REV

SCALE: @ A1CLIENT:

PROJECT:

SITE PLAN

E

D

C

B

A

RICHARD NESSELER

T.GREENING

T.GREENING

KB

W.OTH-326-15

1:1000

D01

TG

TG

29.06.15

29.06.15

29.06.15

A

AIRSTRIP EXTENSION

10 CUMMINGS ROAD

PETERBOROUGH

/

/

/

/

/

/

/

/

/

/

1

2

1

.9

1

1

0

1

1

/

/

/

/

/

/

3

5

6

.4

7

9

9

°3

6

'1

0

"

1

2

1

.9

1

2

9

6

.8

0

/

/

/

1

0

1

1

12

13

1

4

1

5

<

<

<

<

<

<

<

<

<

<

<

<

<

NOTES

REVISION DESCRIPTIONDATEREV DR

CHK APP

1098764321

H

G

F

E

D

C

B

A

www.pmdesign.com.au

Design groupEngineering Solutions

H

G

F

MULTI DISCIPLINE CONSULTING ENGINEERS

223 KOROIT ST, WARRNAMBOOL. VIC. 3280

PHONE: (03) 5564 6888

FAX: (03) 5561 1850

WEB: www.pmdesign.com.au

10987654321

TITLE:

ENGINEER

DESIGNER

DRAWN

DWG No. :

PM PROJECT No. :

CHECKED

APPROVED

DATE

REV

SCALE: @ A1CLIENT:

PROJECT:

DRAINAGE LAYOUT

E

D

C

RICHARD NESSELER

B

A

TG

TG

D02

29.06.15

W.OTH-326-15

A

KB

T.GREENING

T.GREENING

AS SPECIFIED

29.06.15

29.06.15

SWD

AIRSTRIP EXTENSION

10 CUMMINGS ROAD

PETERBOROUGH

Stormwater Management Airstrip Extension

Peterborough

Project Number W.OTH-326-15

Revision 1 17th September 2018

Prepared by: PM Design Group

4/227 Koroit Street Warrnambool 3280 Telephone (03) 55646888

1.0 Introduction

This report has been prepared by PM Design to investigate drainage of stormwater runoff for a runway extension at the Peterborough Airstrip. The design has been prepared in accordance with a request from the Corangamite Shire Council to investigate the effects of the new runway on the existing drainage infrastructure.

2.0 Existing Conditions and Proposed Development

The subject site is approximately 66Ha which currently has a crushed rock runway spanning west to east for roughly 800m. It is proposed to extend the runway to the eastern boundary which borders Jarvis Road. The runway will also have a small extension at the western end of the runway complete with a turning bowl (see civil plan W.OTH-326-15 for details). There are two table drains that run parallel either side of the runway which will be extended to match the proposed runway extension.

Figure 1 As shown in figure 1, there are currently 3 existing culverts which drain the site. Stormwater runoff that falls south of the runway is collected in the south table drain and is discharged through existing culvert 1 which runs under the Great Ocean Road. Runoff discharged through from this culvert feeds into a soakage area. Half of the stormwater runoff generated north of the runway is captured in the north table drain and is discharged to existing culvert 2 which runs under Timboon-Peterborough Road. The other half falls towards Cummings Road and is eventually collected by existing culvert 3 which is also located on Timboon-Peterborough Road. Both existing culverts 2 and 3 discharge to a table drain which feeds the stormwater to Curdies River. Locals within the area have stated that during large storms, the flow of stormwater occasionally exceeds the capacity of existing culvert 1 flooding the surrounding section of the Great Ocean Road. Upon further calculations it was confirmed that during a 10 year ARI event, the flow rate generated from the southern catchment of the subject site would exceed the capacity of existing culvert 1. Therefore it is proposed to install a culvert that runs under the western end of the proposed runway to redirect stormwater travelling through the southern table drain to the northern side of the runway. This will allow a substantial amount of stormwater runoff to be prevented from entering the over occupied existing culvert 1. A new table drain will also be

EXISTING CULVERT 3

EXISTING CULVERT 2

EXISTING CULVERT 1

constructed to drain the captured stormwater from the northern and southern table drains to existing culvert 2 which is currently under capacity (refer to runway drainage plan “W.OTH-326-15_C05” for proposed culvert and table drain).

3.0 Effective Area of Site

The area and co-efficient of runoffs used for this design have been shown on the catchment plan (W.OTH-326-15_C06). A co-efficient of runoff of 0.75 has been adopted for the crushed rock runway and 0.3 for all pervious surfaces (landscaped areas). The effective area contributing to the existing culverts is as follows: Effective Area to Existing Culvert 1, 𝐴𝑒 = 7.596𝐻𝐻 ∗ 0.3 = 2.279𝐻𝐻 Effective Area to Existing Culvert 2, 𝐴𝑒 = 44.725 ∗ 0.3 + 2.974 ∗ 0.9 = 16.095𝐻𝐻 Effective Area to Existing Culvert 3, 𝐴𝑒 = 8.183 ∗ 0.3 = 2.455𝐻𝐻 4.0 Flow to Existing Culverts

Existing Culvert 1 Existing culvert 1 is a 375 diameter reinforced concrete pipe which runs under the Great Ocean Road. Invert Levels taken by PM Design Group indicate that the grade of the pipe is at 1 in 114. Using Manning’s equation, it has been determined that the capacity of existing culvert 1 is 188.5l/s. The following calculations outline the expected maximum flow rate to pass through existing culvert 1 based on a 10 year ARI storm event for Peterborough. Tc = 88.85mins (overland flow in high grass) I = 18.37mm/hr Ae = 2.279Ha

𝑄 =𝐴𝑒 ∗ 𝐼360

𝑄 =2.279 ∗ 18.37

360

𝑄 = 0.116𝑚3

𝑠= 116

𝑙𝑠

A flow rate of 116l/s is below the existing culverts capacity of 188.5 l/s, and will therefore satisfactorily cater for the generated runoff of the site during a 10 year ARI storm event. Existing Culvert 2 Existing culvert 2 is a 450 diameter reinforced concrete pipe which runs under Timboon-Peterborough road approximately 3m past Wards Road. Invert Levels taken by PM Design Group indicate that the grade of the pipe is at 1 in 22. Using Manning’s equation, it has been determined that the capacity of existing culvert 2 is 742.2l/s. The following calculations outline the expected maximum flow rate to pass through existing culvert 2 based on a 10 year ARI storm event for Peterborough. Tc = 103.92mins (overland flow in high grass)

I = 16.59mm/hr Ae = 15.246Ha

𝑄 =𝐴𝑒 ∗ 𝐼360

𝑄 =16.095 ∗ 16.59

360

𝑄 = 0.7417𝑚3

𝑠= 741.7

𝑙𝑠

A flow rate of 741.7l/s is below the existing culverts capacity of 742.2 l/s, and will therefore satisfactorily cater for the generated runoff of the site during a 10 year ARI storm event. Existing Culvert 3 As there will be no change in the effective area contributing to existing culvert 3, calculations of the pipes capacity and expected maximum flow rate have not been conducted.

5.0 Sizing of Proposed Culvert and Table Drain

Sizing of Culvert The proposed culvert will be required to cater for any stormwater runoff that is captured by the southern table drain. The effective area contributing to the culvert is equal to 9.096Ha. Therefore the expected maximum flow rate to pass through the culvert during a 10 year ARI storm event (Peterborough) is equal to:

𝑄 =𝐴𝑒 ∗ 𝐼360

𝑄 =9.096 ∗ 17.91

360

𝑄 = 0.453𝑚3

𝑠= 453

𝑙𝑠

Tc = 92.4mins (overland flow in high grass) I = 17.91mm/hr Ae = 9.096Ha To cater for a capacity of 453 l/s, a 600mm wide x 300mm deep box culvert at 1 in 75 will be required. Sizing of Table Drain The proposed table drain will be required to cater for all stormwater runoff that is to be captured by existing culvert 2. The maximum flow rate (as calculated in section 4) during a 10 year ARI storm event (Peterborough) expected to pass through existing culvert 2 is 703 l/s. Therefore the table drain will be sized as follows: Width of swale base = W = 0.8m Width of batter = B = 1.6m Depth of batter = D = 0.4m Constructing the table drain at a grade of 1 in 210 (approximate grade of the natural surface) will allow for a capacity of 835 l/s. This will adequately cater for the expected flow rate through the proposed table drain.