Note: Where available, the PDF/Word icon below is provided to view the complete and fully formatted document
Public Works Committee Act - Parliamentary Standing Committee on Public Works - Reports - R.A.A.F. Base, Derby, W.A. - Stage 1 development (9th Report of 1982)


Download PDF Download PDF

The Parliament of the Commonwealth of Australia

RAAF BASE DERBY, WESTERN AUSTRALIA, DEVELOPMENT- STAGE 1

Parliamentary Standing Committee on Public Works

(Ninth Report of 1982)

Presented and

ordered to be printed 26 August 1982

Parliamentary Paper No. 246/1982

Parliamentary Standing Committee on Public Works

REPORT

relating to the

DEVELOPMENT OF RAAF BASE, DERBY, WESTERN AUSTRALIA STAGE 1

(Ninth Report of 1982)

THE PARLIAMENT OF THE C O M M O N W E A L T H OF AUSTRALIA 1 9 8 2

1 9 8 2

THE PARLIAMENT OF THE COMMONWEALTH OF AUSTRALIA

PARLIAMENTARY STANDING COMMITTEE ON PUBLIC WORKS

R E P O R T

relating to the

DEVELOPMENT OF

RAAF BASE DERBY

WESTERN AUSTRALIA

STAGE 1

(Ninth Report of 1982)

Australian Government Publishing Service Canberra 1982

© C o m m o n w e a l t h of A u s t r a l i a 1982

Printed by Authority by the Commonwealth Government Printer

MEMBERS OF THE PARLIAMENTARY STANDING COMMITTEE ON PUBLIC WORKS

(Twenty-sixth Committee)

Melville Harold Bungey, Esq., M.P. (Chairman)

James Leslie McMahon, Esq., M.P. (Vice-Chairman) ^

Senate

Senator Dominic John Foreman ^

Senator Bernard Francis Kilgariff

Senator John Raymond Martyr ^

Senator Jean Isabel Melzer 1

Senator Harold William Young t

House of Representatives

David Bruce Cowan, Esq., M.P.

Benjamin Charles Humphreys, Esq, M.

Urquhart Edward Innes, Esq., M.P.

Murray Evan Sainsbury, Esq., M.P.

1 R e t i r e d 30 June 1981.

2 C e a s e d to be m e m b e r on e l e c t i o n as P r e s i d e n t of the S e n a t e on 18 A u g u s t 1981.

3 A p p o i n t e d 25 A u g u s t 1981.

4 A p p o i n t e d 25 A u g u s t 1981.

5 A p p o i n t e d V i c e - C h a i r m a n 27 A u g u s t 1981.

PUBLIC WORKS COMMITTEE ACT 1969 ORDER UNDER SUB-SECTION 18(4)

I, SIR ZELMAN COWEN, the Governor-General of the Commonwealth of Australia, acting with the advice of the Federal Executive Council, in pursuance of Sub-Section 18(4) of the Public Works Committee Act 1969 , hereby, by this Order, declare that the public work described in the schedule be referred to the

Parliamentary Standing Committee on Public Works for consideration and report.

SCHEDULE

DEVELOPMENT OF RAAF BASE DERBY, W.A., STAGE 1

Given under my Hand and the Great Seal of Australia

L.S. on 25 June 1982.

ZELMAN COWEN

By His Excellency's Command, Governor-General

(Signed) Ralph Hunt

Minister of State for Transport and Construction.

WITNESSES

Boschetti, J.F., Esq., Shire Clerk, Shire of West Kimberley, Loch Street, Derby, Western Australia

Brown, E.C., Esq., Acting Chief Aerodrome and Road Engineer, Department of Transport and Construction, PO Box 111, Dickson, Australian Capital Territory

Kneebone, P.R., Esq., Shire President, Shire of West Kimberley, Loch Street, Derby, Western Australia

Lessels, Air Commodore J.D.G., OBE, Director- General, Accommodation and Works - Air Force, Department of Defence, Russell Offices, Canberra, Australian Capital Territory

Miller, N.R., Esq., First Assistant Secretary, Defence Facilities Division, Department of Defence, Russell Offices, Canberra, Australian Capital Territory

Wylie, K.V., Esq., Project Manager, Department of Transport and Construction, 207 Adelaide Terrace, Perth, Western Australia

C O N T E N T S

Paragraph

The Reference 1

The Committee's Investigation 3

The Need 8

Committee's Conclusion 13

Site Selection 14

Site Selection 15

Derby South 18

A site 25 Kilometres east of Derby 20

Nilli Bubbaca 21

A site 20 Kilometres north east of Broome 23

Derby Aerodrome Upgraded 25

Broome Aerodrome Upgraded 26

Committee's Conclusion 27

The Proposal

Scope of the Proposal 28

Master Plan 31

Airfield Pavements 34

Flight Line Facilities 44

Aircraft Shelter 45

Engineering Services 47

Navigational Aids 49

Domestic Facilities 50

Committee's Conclusion 51

Land Acquisition 52

Environmental Considerations 53

Consultation 57

Future Work 59

Limit of Cost 61

Program 62

Committee's Conclusion 64

Recommendations and Conclusions 65

APPENDIX A Paragraph

Construction

Construction Facilities 66

Movement Areas 69

Sources of Pavement Material 78

Buildings 82

Electricity 88

Water 91

Roads 93

Fencing 94

ILLUSTRATIONS

A.

B .

Locality Plan

Site Plan

Airfield Facilities Layout C.

PARLIAMENTARY STANDING COMMITTEE ON PUBLIC WORKS

DEVELOPMENT OF RAAF BASE DERBY, W.A., STAGE 1

R E P O R T

On 25 June 1982 , His Excellency the

Governor-General in Council referred to the Parliamentary

Standing Committee on Public Works for consideration and

report to Parliament the proposed development of RAAF

Base Derby, W.A., Stage 1.

The Committee has the honour to report as

follows:

THE REFERENCE

1· The proposal is for the establishment of a

forward defence air base at Derby to allow operation by

all types of RAAF aircraft deployed there from time to

time. The proposal comprises:

- a runway

- a taxiway system

- four aircraft parking aprons

- ordnance loading facilities

- flight line facilities

- a living area for RAAF personnel

- associated engineering services.

2. The estimated cost of the proposed work when

referred to the Committee was $50.7 million at April 1982

prices.

THE COMMITTEE'S INVESTIGATION

3. The Committee received written submissions

and drawings from the Department of Defence and the

Department of Transport and Construction and took

evidence from their representatives at a public hearing

held in Derby on 26 and 27 July 1982.

1.

4 - The Committee received a written submission

from West Kimberley Shire Council and took evidence from

their representatives.

5. A written submission from Broome Shire Council

and a letter from the Premier of Western Australia were

also received.

6. Prior to the public hearing the Committee

inspected the site of the proposed work. By courtesy of

Airlines of Western Australia members of the Committee also viewed the site from the air.

7. The Committee's proceedings will be printed as

Minutes of Evidence.

THE NEED

8. The White Paper on Australian Defence, November

1976, (Parliamentary Paper 312/1976) referred to a need to

develop airfield and patrol craft bases in the more remote

areas of Australia, particularly in the north. The

statement was made in the context of intentions to develop

and acquire defence facilities.

9. The ability of RAAF fighter aircraft to operate

in the north west of Australia is limited by the lack of

suitable airfields. Military aircraft require relatively

long and strong runways and whilst there are a number of

civil aerodromes in the area they are unsuitable for

fighter and Fill aircraft. The practicalities of

developing civil aerodromes at Broome and Derby to a

standard required by the RAAF are discussed below.

10. At present fighter aircraft can operate from

Darwin/Tindal in the Northern Territory and Learmonth in

Western Australia. These centres are approximately 2,000

kilometres apart and adequate air defence of the entire

north west cannot be provided from them. There is

consequently a need for an airfield about half way between

Darwin and Learmonth to fill the present gap in air defence.

2 .

11· An airfield in this region would also permit

P3 Orion long range maritime patrol aircraft to extend their

area of operations over the Indian Ocean, increase their reaction times and enable these aircraft to remain

on station for longer periods.

12. The Yampi training area, north-west of Derby,

is similarly about half way between Darwin and Learmonth.

A RAAF airfield in its vicinity would serve as a logistics

base for aircraft, personnel and materiel supporting

training exercises in the area. Training activities could

include air defence exercises for tactical fighter aircraft,

major joint service exercises and deployment training for

operational conversion units.

13. Committee's Conclusion The Committee

endorses the need for a military airfield in the North-West

of Australia.

SITE SELECTION

14. The proposal is to construct a RAAF base at

a site about 35 kilometres south-east of Derby.

15. 1 Site Selection Six sites approximately midway

between Darwin and Learmonth, in the Derby-Broome area, were

examined by the Department of Defence and the Department of

Transport and Construction and their suitability was

assessed against the following attributes:

- some natural protection against sea, air

and ground attack and against the effects

of cyclones;

- topography free of features which could

restrict aircraft operations or increase

construction costs;

- proximity to the Yampi training area and to

roads and port facilities;

3.

- scope for the expansion of facilities;

- minimum potential for adverse

environmental effects.

16. A further criterion used in assessing sites

within the general area was their road distances to the

nearest proven source of rock for pavement construction.

17. The possible sites were considered and their

suitability is discussed below:

18. Derby South This site, which is recommended

by the Department of Defence, is bounded to the north by

the Mowunjum Aboriginal Reserve, to the west by a new

diversion road to Derby and to the south by the Great

Northern Highway.

19. It is about 35 kilometres south-east of Derby

and would provide good defence in depth. Ground radar could

be deployed in a forward position for air defence early

warning. It is virtually flat with existing grades not

exceeding one per cent. Road access would be from the

Derby-Broome road or the Great Northern Highway. The soil

is a fine silty sand (known as pindan) providing a good

subgrade on which to construct airfield pavements. There

is sufficient land available to permit master planning for

base expansion. The site is 200 kilometres from the Oscar

Range, the nearest proven source of rock suitable for airfield

pavements. A quarry site in the Oscar Range is 15 kilometres

north of the bitumen sealed Great Northern Highway and only

minor road development work would be necessary for rock

from the quarry to be trucked to this site.

20. A site 25 kilometres east of Derby This

site is comparable to Derby South but has logistic

disadvantages. The road from Derby, while sealed, is

subject to flooding. Furthermore, the quarry site at

Oscar Range is 260 kilometres from the site.

4.

21. Nilli Bubbaca This site is halfway between

Derby and Broome. Broome Shire Council put forward a case

to the Committee favouring this site. They pointed out

that the Great Northern Highway could be impassable during

the wet season and there are substantial rock deposits in

the vicinity for pavement material.

22. in giving careful consideration to the case

favouring this site the Committee noted that its location

offered no advantages over Derby South as it is more remote from

either centre. Furthermore adequate reserves of fuel and

material would be maintained at whatever site is selected.

Finally, the Department of Transport and Construction advised

the Committee that some rock, in the form of small outcrops,

is available locally but it is unlikely that this would be

satisfactory.

23 . A site 20 kilometres north east of Broome

This site is not protected from cyclones and does not

provide good defence in depth. It is about 370 kilometres

from the Oscar Range.

24. The Department of Defence and the Department of

Transport and Construction also assessed the practicalities

and economics of upgrading either one of the two existing

civil aerodromes in the area, at Derby and Broome.

25. Derby Aerodrome Upgraded The aerodrome is on

a peninsula which verges on to a tidal mud flat. It is

estimated that tidal surge would cover the western half of

the main runway. For the runway to be extended would

require the acquisition of land forming part of an

aboriginal reserve and would necessitate the realignment

of the Derby-Broome road.

26. Broome Aerodrome Upgraded Broome Aerodrome

is located adjacent to the town and noise levels from

military aircraft operating around the clock would be

unacceptable to the local community. The site is not

protected from cyclones and provides no defence in depth.

The Oscar Range is about 350 kilometres from the site.

5.

27. Committee's Conclusion The site at Derby

South is satisfactory.

THE PROPOSAL

28. Scope of the Proposal The scope of stage 1

of the development of RAAF Base Derby involves the construction

of airfield pavements, flight line technical facilities, an

aircraft shelter, limited domestic facilities for deployed

personnel and site works for navigation aids.

29. Locality, site and airfield facility layout

plans are at plans A, B and C respectively. Construction

details are at Appendix a .

30. The facilities proposed for Stage 1 are

designed to support concurrent deployments of 16 tactical

fighters, four Fill, two P3 Orion and three C130 aircraft.

31. Master Plan The master plan for the overall

development of RAAF Derby is based on studies of current

trends in overseas defence airfield design.

32. The master plan provides for the protection of

equipment and facilities against modern conventional weapons

by :

- the use of the three main taxiways as

emergency runways;

- the subsequent addition of hardened aircraft

shelters;

- the separation of operational areas from

each other and from domestic and support

facilities;

- the provision of aircraft dispersal zones

adjacent to the emergency runway/taxiways;

and

- the use of cable arrestor systems on the

emergency runways/taxiways.

33. The master plan also sets aside a zone for

civil aviation facilities which may be required in the

longer term. Derby South could become an alternate airport

for international civil aircraft.

6.

34. Airfield Pavements These will consist of

a main runway, parallel, link and angled taxiways, a

general purpose air movements and service apron, ordnance

loading aprons and two aprons for the arming and disarming

of aircraft.

35. The main runway will be 3050 metres in length,

45 metres wide and these dimensions will permit unrestricted

operations by all RAAF aircraft including the FI8. The

runway and associated taxiways could also be used by B747,

Î’ Ί 0 1 , C141 and C5A aircraft. The runway will be unsuitable

for B52 aircraft but the Department of Defence maintained

that there was no need to provide an airfield for such

aircraft at this stage but the Committee feels this aspect

should be further examined.

36. The orientation of the runway is similar to

that at Derby aerodrome, has advantages for runway

operations and suits prevailing wind conditions.

37. The parallel taxiway, to be located about

400 metres south of the main runway, will obviate the

need for aircraft to back track and will permit rapid

access to either end of the runway. The alignment of two

high speed link taxiways (C and D) which will link the

parallel taxiway with the main runway will enable aircraft

to quickly vacate the runway on landing.

38. Two angled taxiways (F and G), each 1525

metres in length and 15 metres wide, will permit aircraft

access to aprons and facilities which will be dispersed

around the site. The separation of operational areas

from each other is a key element of the master plan for

the development of Derby South.

39. A feature of the design, length and config­

uration of the three main taxiways (taxiways A, F and G)

is that they could be used as emergency runways.

40. The Committee was advised that the design

incorporated the latest military airfield design concepts

from overseas countries including Israel and the United

States.

7.

41. A general purpose air movements and service

apron will be located at the western extremity of Taxiway G.

The apron area will be contiguous with the site proposed

for an airtransportable hangar and the area master planned

as the technical support zone. The apron will be sized

to accommodate two P3 Orion and three C130 aircraft.

42. Five ordnance loading aprons will be located

south-east of the eastern end of the main runway. Each

loading apron will be linked by a taxiway loop which will

join the main taxiway system (taxiways H and K ) . The

ordnance loading aprons will accommodate tactical fighter

and Fill aircraft.

43. Two aprons at either end of the main runway

will be constructed to provide parking for aircraft for

their final arming prior to takeoff and for disarming when necessary.

44. Flight Line Facilities These facilities

have been designed to support up to _120 personnel engaged

in round-the-clock operations in support of aircraft

movements. They will be similar to those under construction

at Learmonth, (Committee's Second Report of 1981 - Parliamentary

Paper 43/1981) and will include:

- a technical operations area

- an ablutions area

- food services area

- storage for flyaway kits, ground servicing

equipment and oxygen apparatus; and

- hardstanding for four airtransportable

cabins.

45. Aircraft Shelter The aircraft shelter, for

up to twelve tactical fighter or six Fill aircraft, will

be constructed on an apron between taxiways H and K which .

service the ordnance loading aprons.

46. An aircraft tow road will link the aircraft

apron with general purpose air movements and service apron.

8 .

47. Engineering Services Electrical power will

be supplied from an on-base power house and the proposal

includes the reticulation of power, the provision of

emergency back-up power to operational facilities, water

supply reticulation, sewerage facilities and roads.

48. Pricing policies of the State Energy

Commission of Western Australia makes the on-site

provision of electric generators the most economic method

of supplying the power requirements of the base.

49. Navigational Aids The proposal includes

site works and the provision of engineering services for

airtransportable navigation aids.

50. Domestic Facilities Up to 400 personnel

will be deployed to RAAF Derby for periods of approximately

four to six weeks. Permanent shower, laundry and toilet

facilities will be provided for this number in the domestic

accommodation area located about 1.5 kilometres south of

the general purpose air movements apron. Sleeping

accommodation will initially consist of tents although

permanent facilities will be sited to allow for later

development of the area, the construction of permanent

sleeping accommodation and other buildings.

51. Committee's Conclusion The extent of the

proposed Stage 1 development of RAAF Derby is adequate

for current Defence requirements subject to a reassessment,

by the Department of Defence, of its use by B52 aircraft.

LAND ACQUISITION

52. The site at Derby South, consisting of about

25,000 hectares of freehold land, was acquired by the

Commonwealth in 1982. The Committee was advised that it

was necessary to acquire a relatively large parcel of land

to provide a buffer zone around the operational area, to

provide for future expansion of activities at the base and

to enable proper safety distances for the storage of»

explosive ordnance to be adopted.

9 .

ENVIRONMENTAL CONSIDERATIONS

53. A number of State and Commonwealth departments

were involved in assessing possible environmental impacts

of the proposal.

54. The Department of Aboriginal Affairs indicated

that no sites of traditional importance to the Aboriginal

people are in the acquisition area. The Western Australian

Museum has surveyed the area for Aboriginal sites. There

are no known archeological sites within the acquisition

boundaries although it is possible that sites could be

located during clearance and construction work. If any

sites are located during construction they will be reported

to the Registrar of Aboriginal Sites. The Western Australian

Department of Agriculture advised that vegetation on the

site is common and widespread throughout the West Kimberley

region and that no unique flora and fauna exists on the site.

55. During construction the extent of clearing will

be controlled and limited to that necessary for the carrying

out of the work.

56. Upon completion of the work it is proposed to

level and to re-establish areas cleared for construction

purposes with natural vegetation. Soil loss due to wind

and water will be controlled by establishing grass in

unpaved areas and by the use of shallow surface gradients

in other unpaved areas.

CONSULTATION

5V. A number of Commonwealth and State government

departments were consulted during the planning of the

proposed work. There is general agreement amongst depart­

ments involved.

58. The Shire of West Kimberley was consulted at

various times.

10.

FUTURE WORK

59. Fuel storage tanks are also proposed as part of

Stage 1 but as is customary these have been exempted from

examination by the Committee.

60· The Department of Defence indicated that

Stage 2 facilities could be developed to

include permanent facilities for domestic, operational

and technical support purposes, ordnance storage and

preparation facilities and dispersal areas and

revetments.

LIMIT OF COST

61. The limit of cost estimate for the proposed

work is $50.7 million at April 1982 prices made up as

follows:

$m

Airfield Works 42.0

Building Works 2.7

Engineering Services 6.0

50.7

PROGRAM

62. It is proposed that tenders be invited for

preliminary works, including access roads and water supply,

in September 1982 and for the airfield and other works in

April 1983.

63. Completion of Stage 1 is planned for July 1987.

This timetable meets the requirements of the Department of

Defence.

64. Committee's Conclusion The Committee

recommends the construction of the work in this reference.

11.

RECOMMENDATIONS AND CONCLUSIONS

65. The summary of recommendations and conclusions

of the Committee and the paragraph in the report to which

each refers is set out below:

1.

2.

3.

4 .

5.

Paragraph

THE COMMITTEE ENDORSES THE NEED FOR

A MILITARY AIRFIELD IN THE NORTH­

WEST OF AUSTRALIA. 13

THE SITE AT DERBY SOUTH IS

SATISFACTORY. 27

THE EXTENT OF THE PROPOSED

STAGE 1 DEVELOPMENT OF RAAF DERBY

IS ADEQUATE FOR CURRENT DEFENCE

REQUIREMENTS SUBJECT TO A

REASSESSMENT, BY THE DEPARTMENT

OF DEFENCE, OF ITS USE BY B52

AIRCRAFT.

THE LIMIT OF COST ESTIMATE FOR

THE PROPOSED WORK IS $50.7

MILLION AT APRIL 1982 PRICES.

THE COMMITTEE RECOMMENDS THE

CONSTRUCTION OF THE WORK IN

THIS REFERENCE.

51

61

64

(M.H. BUNGEY) Chairman

Parliamentary Standing Committee on Public Works, Parliament House, CANBERRA, ACT

24 August 1982

APPENDIX A.

CONSTRUCTION

66. Construction Facilities The master plan

provides for an area for Department of Transport and

Construction Facilities.

67. An area will be provided for the contractor's

camp.

68. Seven houses for Department of Transport and

Construction staff will be provided in Derby. These will

be occupied by staff required to maintain the airfield and

the engineering services on completion of the airfield

construction.

69. Movement Areas The aircraft movement area

works will require 1.2 million cubic metres of earthworks,

construction of 450,000 square metres of flexible pavement

and 100,000 square metres of concrete pavement.

70. The main runway will be 3050 metres long by

45 metres wide and will be within a graded flight strip of

3650 metres by 300 metres.

71. The parallel taxiway and taxiways F and G will

each have a minimum straight length of 1525 metres, a width

of 30 metres within 150 metre wide graded flight strips.

72. The pavements have been designed to cater for

the expected movements of existing and planned defence

aircraft. This includes Mirage, FA18, P3 Orion, FlllC and

C130, Caribou and B707.

73. Full strength aircraft pavements will be

provided in the central 23 metre width of the main runway,

the central 15 metre width of the taxiways, across the

entire 45 metre width of the 100 metre long runway ends and

for the aircraft aprons.

74. The full strength flexible pavements will

comprise 50mm of bituminous concrete on 275mm of fine

crushed rock on not less than 200mm of highly compacted

pindan sand on compacted subgrade.

13.

75. All aircraft aprons and the 100 metre long

runway ends will comprise 350mm of cement concrete on

100mm of fine crushed rock on compacted subgrade.

76. The runway over-runs will be 300 metres

long by 45 metres wide. The first 60 metres closest

to the main runway will be constructed in occasional

use flexible aircraft pavement and the balance will be

of compacted pindan sand surfaced with 100mm of

lateritic gravel.

77. Concrete bases for the cable arrestor systems

will be installed at each end of the main runway. Provision

will be made for the installation of portable arrestor

systems on the emergency runways.

78. Sources of Pavement Material As mentioned

above (paragraph 19) the nearest proven source of rock

suitable for aircraft pavement construction is from an

existing quarry in the Oscar Range about 200 kilometres

east of the site and 15 kilometres north of the bitumen

sealed Great Northern Highway.

79. Approximately 500,000 tonnes of crushed rock

will be required for the flexible and concrete aircraft

pavements.

80. Sand for pavement construction will be

obtained from the bed of the Fitzroy River, about 50

kilometres from the site.

81· The project will require 6,000 tonnes of

bitumen and 20,000 tonnes of cement.

82. Buildings As cyclones occur frequently in

this part of Australia all buildings will be designed to

withstand prescribed wind loadings.

83. The aircraft shelter, suitable for 12 tactical

fighters or six Fill aircraft, will be erected on the aircraft

shelter apron. The covered area will be 204 by 32 metres.

84. The flight line facilities, adjacent to the

aircraft shelter apron, are designed to cater for about

120 personnel associated with round-the-clock operations.

Facilities to be provided are: ·

- an air conditioned Technical Operations/

Amenities building which will contain

offices, crew and briefing rooms, a

dining room, meal servery, ablutions and

storage. The building, to be below ground

level, will be constructed of reinforced

concrete and will also serve as a cyclone

shelter.

- a flyaway kit store to accommodate special

kits which accompany operational aircraft.

The store will have a steel frame, walls

and roof.

- a ground servicing equipment shelter,

consisting of a carport type building to

accommodate specialised vehicles and

platforms to service aircraft.

- a liquid dry oxygen shelter, similar to

the ground servicing equipment shelter,

to accommodate the trailer for the liquid

dry breathing oxygen.

85. A primary power house, constructed below

ground of reinforced concrete, will be located south of

the Department of Transport and Construction compound.

Underground diesel fuel storage will also be provided.

86. A below ground emergency powerhouse and control

room for airfield lighting will also be provided.

87. The living area will have compacted gravel

hardstands for tent lines, mobile kitchens and vehicle

parking. Panellised buildings with metal roofs will be

constructed to provide shower, laundry and toilet facilities.

I

15 .

88. Electricity Primary electric power will

be provided by two 50KW, one 20 0KW and one 600KW diesel

driven units at the primary powerhouse. The output of

units will cater for varying loads required.

89. Emergency power for airfield lighting will

be provided by a 150KW diesel alternator. Mobile units

will provide all other emergency power requirements.

90. Electric power will be reticulated throughout

the area via 11KV underground cables with substations

located at appropriate load levels.

91. Water Ground water suitable for domestic

purposes is available from an aquifer to the north of

the airfield. Water will be pumped to 1.3 million litre

concrete water tanks with a 146,000 litre steel elevated

tank providing pressure for reticulation to airfield and

base facilities.

92- Water for fire fighting will be held in

500,000 litre concrete tanks and a pressurised supply

serving a fire hydrant system will be provided by booster

pumps.

93. Roads A sealed two lane road, about 8

kilometres long, will link the Derby-Broome Road with

the airfield facilities. Internal roads within the area

to various facilities will total 10 kilometres.

94. Fencing A perimeter fence, designed to

exclude cattle and small marsupials, will generally follow

the edges of the cleared movement areas.

16.

NORTH ^-OERBY —

DARWIN

— KING S O U N D —

DERBY TO G IBB RIV ER DERBY A IRPO RT LEARM ONTH

MOWANJUM P A STO R A L LEASE

R A A F

D E R B Y /B R O O M E R O A D — ►

LA N D A CQUISITION

TO BROOME

LOCALITY PLAN

RAAF BASE DERBY W.A

GREAT NORTHERN HWY.

S C A L E 1 : 3 5 0 0 0 0

Y EEO A PA STO RA L LEA SE

T O F IT Z R O Y C R O S S IN G

SITE PLAN

RAAF BASE DERBY W.A.

'

v

.TAXIWAY Η A IR C R A F T S H E L T E R A PRO N

ORDNANCE LOADING A P R O N S

Z ] W A T E R TANK CO M PO UND | d.t C.

D P R IM A R Y P O W E R H O U S E

AIRFIELD FACILITIES LAYOUT

RAAF BASE DERBY W.A.