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Request for Amended Advice Agency Response_Energex_Council CDA_01-04-2020
Attached to the e-mail Request for Energex to provide an Amended Advice Agency Response - 152006.1999.4.
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BRISBANE | SUNSHINE COAST | CENTRAL QLD
KON‐TIKI BUSINESS CENTRE
TOWER 1, LEVEL 2, SUITE T1.209,
55 PLAZA PARADE, MAROOCHYDORE QLD 4558
JFP URBAN CONSULTANTS PTY LTD ABN 79 050 414 045
1 April 2020
Job Ref: M1775
Energex Limited
By Email: <[email protected]>
<[email protected]>
Att: Benjamin Freese
Your Ref: HBD 6829410
Re: Request for Amended Advice Agency Response ‐ Change Application (‘Minor Change’) – Development Approval
for Reconfiguring a Lot (Subdivision 1 Lot into 52 Lots plus Park) over land situated at 191 Hollett Road, Noosaville
and described as Lot 53 on SP163571 ‐ Council Application No. 152006.1999
Dear Benjamin,
We refer to Energex’s Advice Agency Response dated 20 December, 2019, which objects to the Change Application
made to Noosa Shire Council for the abovementioned development application.
In accordance with the DA rules, we request an Amended Advice Agency Response, prior to the decision being made
on the change application by Noosa Shire Council. We request Energex’s support and approval of the revised
subdivision layout based on the below response and the attached Electromagnetic Field (EMF) report which
addresses the concerns raised by Energex.
Item 1 – Road Design
Energex may revise its position in relation to the Change Application, subject to the Applicant submitting an
amended proposal showing a perpendicular road crossing of the easement and/or further detailed assessment
addressing the following issues:
Road Design within Easement B on RP177295
The Applicant is to provide further detailed plans/drawings of the proposed road design that demonstrate the
following:
The proposed road design within Easement B on RP177295 including a detailed conductor survey (in
plan and profile) of the development in relation to Energex’s asset. These drawings and conductor
survey are to be prepared by a suitably qualified professional. Energex’s requirements for the conductor
survey are outlined in Attachment 2;
Statutory clearances in accordance with the Electrical Safety Regulations 2013 are maintained after
completion of roadworks. This includes ground clearances and clearances to road equipment, such as
lighting structures; and
Compliance with Energex’s Distribution Earthing Manual regarding clearances to transmission
structures.
Note: the Applicant is to liaise with Energex regarding specific road design requirements to accommodate the
132kV electricity infrastructure corridor. Where required to facilitate the development, the Developer/Applicant
will be responsible for any design and construction costs associated with relocation of electricity infrastructure
and/or other general works on the easement.
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Page 2
Response: Please find attached the revised proposal plan, drawing no. M1775‐13F – Sheets 1 to 6 dated 26th March,
2020, which has been amended to provide a perpendicular road crossing within the electrical easement.
An on‐ground survey has been undertaken to confirm the vertical and horizontal clearances from the existing
electricity infrastructure within proximity of the proposed lots. Please find enclosed plan of Powerline Ground
Clearances drawing no. M1775‐20A dated 29th January, 2020.
The detailed operational works development works will comply with the necessary clearances in accordance with
the Electrical Safety Regulations 2013 and Energex’s Distribution Earthing Manual regarding clearances to
transmission structures. We consider that Energex can revise the advice conditions to be consistent with these
standards where applicable. We note that the revised design layout has sufficient clearance to the electrical
infrastructure well in excess of minimum requirements.
Item 2 – Prudent Avoidance
Prudent Avoidance
The Applicant is to provide an EMF Report prepared by a suitably qualified professional, which as a minimum,
addresses the following points:
Current and future levels of EMF at the common boundary of Easement B on RP177295 and any
proposed lots;
Compliance to applicable standards for EMF with reference to ARPANSA and other international
standards; and
Practical measures to reduce EMF to demonstrate the concept of prudent avoidance
Note: the subdivision plan is to be amended to incorporate any recommendations of the EMF Report.
Response: Please find attached an Electromagnetic Field (EMF) report prepared by J &P Richardson Industries Pty
Ltd, which has addressed the above points. No further setbacks or other practical measures are necessary based on
J & P Richardson’s assessment.
We trust the above and enclosed information satisfactorily addresses Energex’s request for further information and
request that an Amended Advice Agency Response can be issued in support of the proposed subdivision layout at
your earliest convenience.
Should you require any further information, please contact our office on (07) 5450 3900.
Yours faithfully,
ALLISON DRABSCH
Senior Urban Planner
JFP URBAN CONSULTANTS PTY LTD
Encl.
Amended Plan of Development ‐ M1775‐13F – Sheets 1 to 6 prepared by JFP Urban Consultants Pty Ltd
Powerline Ground Clearances ‐ M1775‐20A prepared by JFP Urban Consultants Pty Ltd
Electromagnetic Field Assessment (EMF Report) prepared by J & P Richardson Industries Pty Ltd
cc: Noosa Shire Council
Kathy Hofmann
HopgoodGanim – R. Lamb
JFP Ref: M1775 Page 2
Page 3
PROPERTY DESCRIPTION STATISTICS STAGE 1 STAGE 2 STAGE 3 TOTAL
LOT 53 ON SP163571 NO. OF LOTS
PARISH OF TEWANTIN/WEYBA LOW DENSITY 17 22 -- 39
COUNTY OF MARCH RURAL PURSUIT -- -- 1 1
TOTAL AREA 110.0 ha TOTAL 17 22 1 40
NOTES LENGTH OF NEW
20m ROAD 470m 840m -- 1310m
(1) This plan was prepared for the purpose and exclusive use of AREA OF PARK 38.12ha 11.74ha 10.204ha 60.064ha
K HOFMANN to accompany an application to NOOSA SHIRE COUNCIL for
a Development Permit to Reconfigure the land described in the plan and TOTAL AREA 46.93ha 30.14ha 32.93ha 110.0ha
is not to be used for any other purpose or by any other person or TOTAL NETT AREA OF LOTS (excluding lots 22 & 40) 16.7ha
corporation. AVERAGE LOT SIZE (excluding lots 22 & 40) 0.439ha
JFP URBAN CONSULTANTS PTY LTD accepts no responsibility for any loss
or damage suffered howsoever arising to any person or corporation
who may use or rely on this plan in contravention to the terms of this
clause or clauses 2, 3 or 4 hereof.
(2) The contours on this plan were derived from 2014 LIDAR data and
are suitable only for the purpose of this application. The accuracy of the
contours has not been verified and no reliance should be placed upon
such contours for any purpose other than for the purpose of this
application.
(3) The dimensions, areas, size and location of improvements, flood
information (if shown) and number of lots shown on this plan are
approximate only and may vary.
(4) This plan may not be reproduced unless these notes are included.
LEGEND
STAGING
POWER POLES
30m MANDATORY BUILDING SETBACK
BUILDING ENVELOPE (1600m² max.) 53
SP163571
FIRE TRAIL (12m WIDE)
RL 3.0
ENVIRONMENTAL ENHANCEMENT (NP2016)
ENVIRONMENTAL PROTECTION (NP2016) 53
SP163571
FLOOD HAZARD OVERLAY (NP2016)
RIPARIAN BUFFER AREA (NP2016)
3
STREAMS AND RIVERS (NP2016)
WATERCOURSE AND DRAINAGE (NP2016)
1 2
CATEGORY A OR B AREA CONTAINING
ENDANGERED REGIONAL ECOSYSTEMS
CATEGORY A OR B AREA CONTAINING
OF CONCERN REGIONAL ECOSYSTEMS
CATEGORY A OR B AREA THAT IS
LEAST CONCERN REGIONAL ECOSYSTEM
NON GQAL
FRAGMENTED GQAL
NON GQAL DUE TO
WETNESS LIMITATIONS
POSSIBLE GQAL SUBJECT
TO LOW WATER STORE
EMERGENCY ACCESS FOR FIREFIGHTING
PURPOSES FROM WALTER HAY DRIVE
EXISTING EMERGENCY MANAGEMENT TRAIL
NORTH: SCALE: ISSUES: TITLE: DETAILS:
PROJECT: STAGE: PLAN: ISSUE:
N SCALE: @ A1 1:2500 @ A3 1:5000
M1775 00 13 F
BRISBANE - SUNSHINE COAST - CENTRAL QLD
SUNSHINE COAST
PLANNERS
URBAN DESIGNERS
0 50 100 150 200 250 300
metres
F
E
STAGE 2 LAYOUT AMENDED
LAYOUT AMENDED
26-03-20
16-09-19
TJM
TJM RECONFIGURATION PLAN SHEET:
Tower 1, Level 2, 55 Plaza Parade, THIS SCALE SHOWN IS ORIGINAL DRAWING SCALE - (A1 SIZE) D LAYOUT AMENDED 11-09-19 TJM 1 OF 6
Maroochydore, Qld 4558
P 07 5450 3900 W www.jfp.com.au
SURVEYORS
ENGINEERS
DO NOT SCALE FROM THIS DRAWING - USE ONLY DIMENSIONS PROVIDED - IF IN DOUBT PLEASE ENQUIRE C BLE'S AMENDED 09-08-19 DWW K HOFMANN FILE:
B BLE'S AMENDED & ADDED 07-08-19 DWW M1775-13F-RP.dwg
CONSULTANTS JFP URBAN CONSULTANTS PTY LTD A.C.N. 050 414 045 LANDSCAPE ARCHITECTS DESIGNED TJM CHECKED AD DATUM A ORIGINAL 25-07-19 TJM HOLLETT ROAD, NOOSAVILLE DATE:
DRAWN TJM APPROVED GB L.A. NOOSA SHIRE COUNCIL ISSUE: DETAILS: DATE: INIT: 26th March 2020
COPYRIGHT © 2020 JFP URBAN CONSULTANTS PTY LTD. THIS DOCUMENT MAY NOT BE COPIED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS IN PART OR IN WHOLE WITHOUT THE WRITTEN CONSENT OF JFP URBAN CONSULTANTS PTY LTD.
Page 4
PROPERTY DESCRIPTION STATISTICS STAGE 1 STAGE 2 STAGE 3 TOTAL
LOT 53 ON SP163571 NO. OF LOTS
PARISH OF TEWANTIN/WEYBA LOW DENSITY 17 22 -- 39
COUNTY OF MARCH RURAL PURSUIT -- -- 1 1
TOTAL AREA 110.0 ha
TOTAL 17 22 1 40
NOTES LENGTH OF NEW
20m ROAD 470m 840m -- 1310m
(1) This plan was prepared for the purpose and exclusive use of
K HOFMANN to accompany an application to NOOSA SHIRE COUNCIL for
AREA OF PARK 38.12ha 11.74ha 10.204ha 60.064ha
a Development Permit to Reconfigure the land described in the plan and TOTAL AREA 46.93ha 30.14ha 32.93ha 110.0ha
is not to be used for any other purpose or by any other person or TOTAL NETT AREA OF LOTS (excluding lots 22 & 40) 16.7ha
corporation.
JFP URBAN CONSULTANTS PTY LTD accepts no responsibility for any loss
AVERAGE LOT SIZE (excluding lots 22 & 40) 0.439ha
or damage suffered howsoever arising to any person or corporation
who may use or rely on this plan in contravention to the terms of this
clause or clauses 2, 3 or 4 hereof.
(2) The contours on this plan were derived from 2014 LIDAR data and
are suitable only for the purpose of this application. The accuracy of the
contours has not been verified and no reliance should be placed upon
such contours for any purpose other than for the purpose of this
application.
(3) The dimensions, areas, size and location of improvements, flood
information (if shown) and number of lots shown on this plan are
approximate only and may vary.
(4) This plan may not be reproduced unless these notes are included.
LEGEND
STAGING
POWER POLES 53
SP163571
30m MANDATORY BUILDING SETBACK
BUILDING ENVELOPE (1600m² max.)
FIRE TRAIL (12m WIDE)
FAUNA CROSSING POINT 53
SP163571
STREAMS AND RIVERS (NP2016)
WATERCOURSE AND DRAINAGE (NP2016) 3
CATEGORY A OR B AREA CONTAINING
ENDANGERED REGIONAL ECOSYSTEMS
CATEGORY A OR B AREA CONTAINING
OF CONCERN REGIONAL ECOSYSTEMS
1 2
CATEGORY A OR B AREA THAT IS
LEAST CONCERN REGIONAL ECOSYSTEM
EMERGENCY ACCESS FOR FIREFIGHTING
PURPOSES FROM WALTER HAY DRIVE
EXISTING EMERGENCY MANAGEMENT TRAIL
NORTH: SCALE: ISSUES: TITLE: DETAILS:
PROJECT: STAGE: PLAN: ISSUE:
N SCALE: @ A1 1:2500 @ A3 1:5000 M1775 00 13 F
BRISBANE - SUNSHINE COAST - CENTRAL QLD
SUNSHINE COAST
PLANNERS
URBAN DESIGNERS
0 50 100 150 200 250 300
metres
F
E
STAGE 2 LAYOUT AMENDED
LAYOUT AMENDED
26-03-20
16-09-19
TJM
TJM PLAN OF DEVELOPMENT SHEET:
Tower 1, Level 2, 55 Plaza Parade, THIS SCALE SHOWN IS ORIGINAL DRAWING SCALE - (A1 SIZE) D LAYOUT AMENDED 11-09-19 TJM 2 OF 6
Maroochydore, Qld 4558
P 07 5450 3900 W www.jfp.com.au
SURVEYORS
ENGINEERS
DO NOT SCALE FROM THIS DRAWING - USE ONLY DIMENSIONS PROVIDED - IF IN DOUBT PLEASE ENQUIRE C BLE'S AMENDED 09-08-19 DWW K HOFMANN FILE:
B BLE'S AMENDED & ADDED 07-08-19 DWW M1775-13F-RP.dwg
CONSULTANTS JFP URBAN CONSULTANTS PTY LTD A.C.N. 050 414 045 LANDSCAPE ARCHITECTS DESIGNED TJM CHECKED AD DATUM A ORIGINAL 25-07-19 TJM HOLLETT ROAD, NOOSAVILLE DATE:
DRAWN TJM APPROVED GB L.A. NOOSA SHIRE COUNCIL ISSUE: DETAILS: DATE: INIT: 26th March 2020
COPYRIGHT © 2020 JFP URBAN CONSULTANTS PTY LTD. THIS DOCUMENT MAY NOT BE COPIED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS IN PART OR IN WHOLE WITHOUT THE WRITTEN CONSENT OF JFP URBAN CONSULTANTS PTY LTD.
Page 5
PROPERTY DESCRIPTION STATISTICS STAGE 1 STAGE 2 STAGE 3 TOTAL
LOT 53 ON SP163571 NO. OF LOTS
PARISH OF TEWANTIN/WEYBA LOW DENSITY 17 22 -- 39
COUNTY OF MARCH RURAL PURSUIT -- -- 1 1
TOTAL AREA 110.0 ha TOTAL 17 22 1 40
NOTES LENGTH OF NEW
20m ROAD 470m 840m -- 1310m
(1) This plan was prepared for the purpose and exclusive use of AREA OF PARK 38.12ha 11.74ha 10.204ha 60.064ha
K HOFMANN to accompany an application to NOOSA SHIRE COUNCIL for
a Development Permit to Reconfigure the land described in the plan and TOTAL AREA 46.93ha 30.14ha 32.93ha 110.0ha
is not to be used for any other purpose or by any other person or TOTAL NETT AREA OF LOTS (excluding lots 22 & 40) 16.7ha
corporation. AVERAGE LOT SIZE (excluding lots 22 & 40) 0.439ha
JFP URBAN CONSULTANTS PTY LTD accepts no responsibility for any loss
or damage suffered howsoever arising to any person or corporation
who may use or rely on this plan in contravention to the terms of this
clause or clauses 2, 3 or 4 hereof.
(2) The contours on this plan were derived from 2014 LIDAR data and
are suitable only for the purpose of this application. The accuracy of the
contours has not been verified and no reliance should be placed upon
such contours for any purpose other than for the purpose of this
application.
(3) The dimensions, areas, size and location of improvements, flood
information (if shown) and number of lots shown on this plan are
approximate only and may vary.
(4) This plan may not be reproduced unless these notes are included.
LEGEND
STAGING
POWER POLES 53
SP163571
ENVIRONMENTAL ENHANCEMENT (NP2016)
ENVIRONMENTAL PROTECTION (NP2016)
FLOOD HAZARD OVERLAY (NP2016)
53
SP163571
RIPARIAN BUFFER AREA (NP2016)
STREAMS AND RIVERS (NP2016)
WATERCOURSE AND DRAINAGE (NP2016)
3
EMERGENCY ACCESS FOR FIREFIGHTING
PURPOSES FROM WALTER HAY DRIVE
EXISTING EMERGENCY MANAGEMENT TRAIL
1 2
NORTH: SCALE: ISSUES: TITLE: DETAILS:
PROJECT: STAGE: PLAN: ISSUE:
N SCALE: @ A1 1:2500 @ A3 1:5000
M1775 00 13 F
BRISBANE - SUNSHINE COAST - CENTRAL QLD
SUNSHINE COAST
PLANNERS
URBAN DESIGNERS
0 50 100 150 200 250 300
metres
F
E
STAGE 2 LAYOUT AMENDED
LAYOUT AMENDED
26-03-20
16-09-19
TJM
TJM COUNCIL OVERLAYS SHEET:
Tower 1, Level 2, 55 Plaza Parade, THIS SCALE SHOWN IS ORIGINAL DRAWING SCALE - (A1 SIZE) D LAYOUT AMENDED 11-09-19 TJM 3 OF 6
Maroochydore, Qld 4558
P 07 5450 3900 W www.jfp.com.au
SURVEYORS
ENGINEERS
DO NOT SCALE FROM THIS DRAWING - USE ONLY DIMENSIONS PROVIDED - IF IN DOUBT PLEASE ENQUIRE C BLE'S AMENDED 09-08-19 DWW K HOFMANN FILE:
B BLE'S AMENDED & ADDED 07-08-19 DWW M1775-13F-RP.dwg
C O N S U L T A N T S JFP URBAN CONSULTANTS PTY LTD A.C.N. 050 414 045 LANDSCAPE ARCHITECTS DESIGNED TJM CHECKED AD DATUM A ORIGINAL 25-07-19 TJM HOLLETT ROAD, NOOSAVILLE DATE:
DRAWN TJM APPROVED GB L.A. NOOSA SHIRE COUNCIL ISSUE: DETAILS: DATE: INIT: 26th March 2020
COPYRIGHT © 2020 JFP URBAN CONSULTANTS PTY LTD. THIS DOCUMENT MAY NOT BE COPIED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS IN PART OR IN WHOLE WITHOUT THE WRITTEN CONSENT OF JFP URBAN CONSULTANTS PTY LTD.
Page 6
PROPERTY DESCRIPTION STATISTICS STAGE 1 STAGE 2 STAGE 3 TOTAL
LOT 53 ON SP163571 NO. OF LOTS
PARISH OF TEWANTIN/WEYBA LOW DENSITY 17 22 -- 39
COUNTY OF MARCH RURAL PURSUIT -- -- 1 1
TOTAL AREA 110.0 ha TOTAL 17 22 1 40
NOTES LENGTH OF NEW
20m ROAD 470m 840m -- 1310m
(1) This plan was prepared for the purpose and exclusive use of AREA OF PARK 38.12ha 11.74ha 10.204ha 60.064ha
K HOFMANN to accompany an application to NOOSA SHIRE COUNCIL for
a Development Permit to Reconfigure the land described in the plan and TOTAL AREA 46.93ha 30.14ha 32.93ha 110.0ha
is not to be used for any other purpose or by any other person or TOTAL NETT AREA OF LOTS (excluding lots 22 & 40) 16.7ha
corporation. AVERAGE LOT SIZE (excluding lots 22 & 40) 0.439ha
JFP URBAN CONSULTANTS PTY LTD accepts no responsibility for any loss
or damage suffered howsoever arising to any person or corporation
who may use or rely on this plan in contravention to the terms of this
clause or clauses 2, 3 or 4 hereof.
(2) The contours on this plan were derived from 2014 LIDAR data and
are suitable only for the purpose of this application. The accuracy of the
contours has not been verified and no reliance should be placed upon
such contours for any purpose other than for the purpose of this
application.
(3) The dimensions, areas, size and location of improvements, flood
information (if shown) and number of lots shown on this plan are
approximate only and may vary.
(4) This plan may not be reproduced unless these notes are included.
LEGEND
STAGING
53
POWER POLES SP163571
CATEGORY A OR B AREA CONTAINING
ENDANGERED REGIONAL ECOSYSTEMS
CATEGORY A OR B AREA CONTAINING
OF CONCERN REGIONAL ECOSYSTEMS
CATEGORY A OR B AREA THAT IS
LEAST CONCERN REGIONAL ECOSYSTEM 53
SP163571
3
1 2
NORTH: SCALE: ISSUES: TITLE: DETAILS:
PROJECT: STAGE: PLAN: ISSUE:
N SCALE: @ A1 1:2500 @ A3 1:5000
BRISBANE - SUNSHINE COAST - CENTRAL QLD M1775 00 13 F
SUNSHINE COAST
PLANNERS
URBAN DESIGNERS
0 50 100 150 200 250 300
metres
F
E
STAGE 2 LAYOUT AMENDED
LAYOUT AMENDED
26-03-20
16-09-19
TJM
TJM REGULATED VEGETATION OVERLAY SHEET:
Tower 1, Level 2, 55 Plaza Parade, THIS SCALE SHOWN IS ORIGINAL DRAWING SCALE - (A1 SIZE) D LAYOUT AMENDED 11-09-19 TJM 4 OF 6
Maroochydore, Qld 4558
P 07 5450 3900 W www.jfp.com.au
SURVEYORS
ENGINEERS
DO NOT SCALE FROM THIS DRAWING - USE ONLY DIMENSIONS PROVIDED - IF IN DOUBT PLEASE ENQUIRE C BLE'S AMENDED 09-08-19 DWW K HOFMANN FILE:
B BLE'S AMENDED & ADDED 07-08-19 DWW M1775-13F-RP.dwg
CONSULTANTS JFP URBAN CONSULTANTS PTY LTD A.C.N. 050 414 045 LANDSCAPE ARCHITECTS DESIGNED TJM CHECKED AD DATUM A ORIGINAL 25-07-19 TJM HOLLETT ROAD, NOOSAVILLE DATE:
DRAWN TJM APPROVED GB L.A. NOOSA SHIRE COUNCIL ISSUE: DETAILS: DATE: INIT: 26th March 2020
COPYRIGHT © 2020 JFP URBAN CONSULTANTS PTY LTD. THIS DOCUMENT MAY NOT BE COPIED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS IN PART OR IN WHOLE WITHOUT THE WRITTEN CONSENT OF JFP URBAN CONSULTANTS PTY LTD.
Page 7
PROPERTY DESCRIPTION STATISTICS STAGE 1 STAGE 2 STAGE 3 TOTAL
LOT 53 ON SP163571 NO. OF LOTS
PARISH OF TEWANTIN/WEYBA LOW DENSITY 17 22 -- 39
COUNTY OF MARCH RURAL PURSUIT -- -- 1 1
TOTAL AREA 110.0 ha TOTAL 17 22 1 40
NOTES LENGTH OF NEW
20m ROAD 470m 840m -- 1310m
(1) This plan was prepared for the purpose and exclusive use of AREA OF PARK 38.12ha 11.74ha 10.204ha 60.064ha
K HOFMANN to accompany an application to NOOSA SHIRE COUNCIL for
a Development Permit to Reconfigure the land described in the plan and TOTAL AREA 46.93ha 30.14ha 32.93ha 110.0ha
is not to be used for any other purpose or by any other person or TOTAL NETT AREA OF LOTS (excluding lots 22 & 40) 16.7ha
corporation. AVERAGE LOT SIZE (excluding lots 22 & 40) 0.439ha
JFP URBAN CONSULTANTS PTY LTD accepts no responsibility for any loss
or damage suffered howsoever arising to any person or corporation
who may use or rely on this plan in contravention to the terms of this
clause or clauses 2, 3 or 4 hereof.
(2) The contours on this plan were derived from 2014 LIDAR data and
are suitable only for the purpose of this application. The accuracy of the
contours has not been verified and no reliance should be placed upon
such contours for any purpose other than for the purpose of this
application.
(3) The dimensions, areas, size and location of improvements, flood
information (if shown) and number of lots shown on this plan are
approximate only and may vary.
(4) This plan may not be reproduced unless these notes are included.
LEGEND
STAGING
53
SP163571
POWER POLES
NON GQAL
FRAGMENTED GQAL
NON GQAL DUE TO
WETNESS LIMITATIONS 53
SP163571
POSSIBLE GQAL SUBJECT
TO LOW WATER STORE
3
1 2
NORTH: SCALE: ISSUES: TITLE: DETAILS:
PROJECT: STAGE: PLAN: ISSUE:
N SCALE: @ A1 1:2500 @ A3 1:5000
M1775 00 13 F
BRISBANE - SUNSHINE COAST - CENTRAL QLD
SUNSHINE COAST
PLANNERS
URBAN DESIGNERS
0 50 100 150 200 250 300
metres
F
E
STAGE 2 LAYOUT AMENDED
LAYOUT AMENDED
26-03-20
16-09-19
TJM
TJM GQAL OVERLAY SHEET:
Tower 1, Level 2, 55 Plaza Parade, THIS SCALE SHOWN IS ORIGINAL DRAWING SCALE - (A1 SIZE) D LAYOUT AMENDED 11-09-19 TJM 5 OF 6
Maroochydore, Qld 4558
P 07 5450 3900 W www.jfp.com.au
SURVEYORS
ENGINEERS
DO NOT SCALE FROM THIS DRAWING - USE ONLY DIMENSIONS PROVIDED - IF IN DOUBT PLEASE ENQUIRE C BLE'S AMENDED 09-08-19 DWW K HOFMANN FILE:
B BLE'S AMENDED & ADDED 07-08-19 DWW M1775-13F-RP.dwg
CONSULTANTS JFP URBAN CONSULTANTS PTY LTD A.C.N. 050 414 045 LANDSCAPE ARCHITECTS DESIGNED TJM CHECKED AD DATUM A ORIGINAL 25-07-19 TJM HOLLETT ROAD, NOOSAVILLE DATE:
DRAWN TJM APPROVED GB L.A. NOOSA SHIRE COUNCIL ISSUE: DETAILS: DATE: INIT: 26th March 2020
COPYRIGHT © 2019 JFP URBAN CONSULTANTS PTY LTD. THIS DOCUMENT MAY NOT BE COPIED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS IN PART OR IN WHOLE WITHOUT THE WRITTEN CONSENT OF JFP URBAN CONSULTANTS PTY LTD.
Page 8
PROPERTY DESCRIPTION STATISTICS STAGE 1 STAGE 2 STAGE 3 TOTAL
LOT 53 ON SP163571 NO. OF LOTS
PARISH OF TEWANTIN/WEYBA LOW DENSITY 17 22 -- 39
COUNTY OF MARCH RURAL PURSUIT -- -- 1 1
TOTAL AREA 110.0 ha TOTAL 17 22 1 40
NOTES LENGTH OF NEW
20m ROAD 470m 840m -- 1310m
(1) This plan was prepared for the purpose and exclusive use of AREA OF PARK 38.12ha 11.74ha 10.204ha 60.064ha
K HOFMANN to accompany an application to NOOSA SHIRE COUNCIL for
a Development Permit to Reconfigure the land described in the plan and TOTAL AREA 46.93ha 30.14ha 32.93ha 110.0ha
is not to be used for any other purpose or by any other person or TOTAL NETT AREA OF LOTS (excluding lots 22 & 40) 16.7ha
corporation. AVERAGE LOT SIZE (excluding lots 22 & 40) 0.439ha
JFP URBAN CONSULTANTS PTY LTD accepts no responsibility for any loss
or damage suffered howsoever arising to any person or corporation
who may use or rely on this plan in contravention to the terms of this
clause or clauses 2, 3 or 4 hereof.
(2) The contours on this plan were derived from 2014 LIDAR data and
are suitable only for the purpose of this application. The accuracy of the
contours has not been verified and no reliance should be placed upon
such contours for any purpose other than for the purpose of this
application.
(3) The dimensions, areas, size and location of improvements, flood
information (if shown) and number of lots shown on this plan are
approximate only and may vary.
(4) This plan may not be reproduced unless these notes are included.
LEGEND
STAGING
POWER POLES 53
SP163571
FIRE TRAIL (12m WIDE)
RIPARIAN BUFFER AREA (NP2016)
WATERCOURSE AND DRAINAGE (NP2016)
CATEGORY A OR B AREA CONTAINING 53
SP163571
ENDANGERED REGIONAL ECOSYSTEMS
CATEGORY A OR B AREA CONTAINING
OF CONCERN REGIONAL ECOSYSTEMS
EMERGENCY ACCESS FOR FIREFIGHTING
PURPOSES FROM WALTER HAY DRIVE
3
EXISTING EMERGENCY MANAGEMENT TRAIL
1 2
NORTH: SCALE: ISSUES: TITLE: DETAILS:
PROJECT: STAGE: PLAN: ISSUE:
N SCALE: @ A1 1:2500 @ A3 1:5000
M1775 00 13 F
BRISBANE - SUNSHINE COAST - CENTRAL QLD
SUNSHINE COAST
PLANNERS
URBAN DESIGNERS
0 50 100 150 200 250 300
metres
F
E
STAGE 2 LAYOUT AMENDED
LAYOUT AMENDED
26-03-20
16-09-19
TJM
TJM AERIAL OVERLAY SHEET:
Tower 1, Level 2, 55 Plaza Parade, THIS SCALE SHOWN IS ORIGINAL DRAWING SCALE - (A1 SIZE) D LAYOUT AMENDED 11-09-19 TJM 6 OF 6
Maroochydore, Qld 4558
P 07 5450 3900 W www.jfp.com.au
SURVEYORS
ENGINEERS
DO NOT SCALE FROM THIS DRAWING - USE ONLY DIMENSIONS PROVIDED - IF IN DOUBT PLEASE ENQUIRE C BLE'S AMENDED 09-08-19 DWW K HOFMANN FILE:
B BLE'S AMENDED & ADDED 07-08-19 DWW M1775-13F-RP.dwg
CONSULTANTS JFP URBAN CONSULTANTS PTY LTD A.C.N. 050 414 045 LANDSCAPE ARCHITECTS DESIGNED TJM CHECKED AD DATUM A ORIGINAL 25-07-19 TJM HOLLETT ROAD, NOOSAVILLE DATE:
DRAWN TJM APPROVED GB L.A. NOOSA SHIRE COUNCIL ISSUE: DETAILS: DATE: INIT: 26th March 2020
COPYRIGHT © 2019 JFP URBAN CONSULTANTS PTY LTD. THIS DOCUMENT MAY NOT BE COPIED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS IN PART OR IN WHOLE WITHOUT THE WRITTEN CONSENT OF JFP URBAN CONSULTANTS PTY LTD.
Page 9
Powerlin
to Easem e Clearance
ent = 11
.2m
Powerlin
to Easem e Clearance
ent = 10
.1m
11.3m
Ground =19.3
und =13 .4
.9m
RL =5
10.4m
ine RL
3.84
bove Gro und RL =2.3
.54m
ine RL =1
Power L
11.6m
und =11
bove Gro
0.4
bove Gro und RL =6.3
.1m
ine RL =2
und =14
10.4m
Gro
Ground =15.9
und =10 .3
.6m
Power L
RL =5
Height A
e RL
Gro
Power L
.9
bove Gro und RL =6.0
.9m
e RL =23
Power Lin
3
Height A
=6.53
.7m
Ground (at fence) =20.2
und =17
bove Gro
nce)=13
Height A
bove Gro RL (at fence)
Power Lin
Gro
Height A
und (at fe
ine RL
Height A
Power L
Height A
PROPERTY DESCRIPTION
LOT 53 ON SP163571
NOTES
(1) This plan was prepared for the purpose and exclusive use of
K HOFMANN and their other professional advisers and is not to be
used for any other purpose or by any other person or corporation. (5) The contours on this plan were derived from 2014 LIDAR data
JFP URBAN CONSULTANTS PTY LTD accepts no responsibility for and are suitable only for the purpose of this application. The
any loss or damage arising to any person or corporation who may Accuracy of the contours has not been verified and no reliance
use or rely on this plan in contravention of these terms. should be placed upon such contours for any purpose other than
for the purpose of this application
(3) Only a small number of spot heights are shown. Refer to the
AutoCAD drawing for all spot heights and codes in layers: X-RL, (6) These notes form an integral part of this plan. If others use this
X-CODE & X-MARK. information, they should be advised of its purpose and limitations.
(4) Spot heights are representative of the topographical terrain at (7) This plan may not be reproduced unless these notes are
time of survey, 28/01/2020. included.
NORTH: SCALE: ISSUES: TITLE: DETAILS:
PROJECT: PLAN: ISSUE:
N SCALE: @ A3 1:2000
BRISBANE - SUNSHINE COAST - CENTRAL QLD PLANNERS 0 20 40 60 80 100 120 140
POWERLINE GROUND CLEARANCE M1775 20 A
SCALE 1:2000 at (A3) size SHEET:
SUNSHINE COAST URBAN DESIGNERS
Tower 1, Level 2, 55 Plaza Parade, SURVEYORS
THIS SCALE SHOWN IS ORIGINAL DRAWING SCALE - (A3 SIZE)
K HOFMANN 1 OF 1
DO NOT SCALE FROM THIS DRAWING - USE ONLY DIMENSIONS PROVIDED - IF IN DOUBT PLEASE ENQUIRE FILE:
Maroochydore, Qld 4558
P 07 5450 3900 W www.jfp.com.au ENGINEERS
LANDSCAPE ARCHITECTS
SURVEYED LCM CHECKED DNE DATUM MGA Zone 56
A ORIGINAL ISSUE 29-01-2020 TLP
191 HOLLETT ROAD M1775-20 Powerlines.dwg
DATE:
C O N S U L T A N T S JFP URBAN CONSULTANTS PTY LTD ACN 050 414 045 DRAWN TLP APPROVED DNE ORIGIN (BM) AHD vide SMARTNET ISSUE: DETAILS: DATE: INIT: NOOSAVILLE 29th January 2020
COPYRIGHT © 2012 JFP URBAN CONSULTANTS PTY LTD. THIS DOCUMENT MAY NOT BE COPIED OR TRANSMITTED IN ANY FORM OR BY ANY MEANS IN PART OR IN WHOLE WITHOUT THE WRITTEN CONSENT OF JFP URBAN CONSULTANTS PTY LTD.
Page 10
PROPOSED SUBDIVISION AT HOLLETT ROAD, NOOSAVILLE
Assessment of magnetic field levels associated with
ENERGEX overhead 132kV circuits F790 / F7298
A report completed by J&P Richardson Industries Pty Ltd
for KATHLEEN HOFMANN
REVISION HISTORY
Number Date Status Description
0.41 18/3/2020 Preliminary For review
1.0 27/3/2020 Initial For approval
Page 11
(i)
SUMMARY
A subdivision is proposed of Lot 53 SP163571 at Hollett Road, Noosaville.
Lot 53 is encumbered by a 26.5 metre wide easement that accommodates an
ENERGEX double circuit concrete and steel tower line supporting two 132kV high
voltage circuits.
ENERGEX has requested that an assessment be undertaken of the magnetic field
levels impacting on the proposed lots that will be located adjacent to the transmission
corridor to confirm that the levels are within industry standards and guidelines.
Average and maximum magnetic field calculations have been completed with respect
to the installed infrastructure and determined to be significantly less than the adopted
reference value of 4mG at the edge of the easement nearest the subject lots.
The subdivision layout has incorporated the principles of prudent avoidance in
building location and design on lots adjacent to the subdivision. This provision will
further reduce the magnetic field levels experienced by persons occupying the
residential subdivision.
Any miscellaneous development of the easement area for park or other recreational
purposes should aim to keep persons as clear of the powerline structures and
conductor alignment as practicable.
Page 12
( ii )
TABLE OF CONTENTS
1.0 INTRODUCTION …….....……………….…………………………….................... 1
1.1 Property description
1.2 Proposed Subdivision
1.3 Purpose of study
1.4 Methodology for assessing magnetic fields
2.0 THE TRANSMISSION LINES…………………………….………….................. 3
2.1 Transmission line alignment and route
2.2 Particulars in relation to Hollett Road property
2.3 Feeder loading analysis
2.4 Scenarios for future development
3.0 BACKGROUND ON MAGNETIC FIELDS ………………………..………..….… 6
3.1 ARPANSA and ENA
3.2 Australian Guidelines
3.3 Prudent avoidance
3.4 Electronic devices
4.0 MAGNETIC AND ELECTRIC FIELD CALCULATIONS……………..……….… 8
4.1 General Parameters
4.2 Average conductor height and geometry
4.3 Magnetic and Electric field calculations
5.0 METHODS FOR REDUCING MAGNETIC FIELD LEVELS………..……….…..13
5.1 Background
5.2 Increasing distance from source
5.3 Conductor geometry and phase configuration
5.4 Conductor compactness
5.5 Load current reduction and balancing
5.6 Undergrounding
6.0 DISCUSSION….……...………………......……...…………………………………. 14
6.1 Summary of magnetic field calculations
6.2 Assessment of magnetic field levels
6.3 Application of prudent avoidance principles
6.4 General electrical safety considerations
7.0 CONCLUSIONS.……...………………......……...…………………………………. 16
7.1 Review of key criteria
7.2 Assumptions and limitations
APPENDIX 1 Subdivision plan of development…………………………………….. 17
APPENDIX 2 F790/F7298 structure site survey drawing……..………………….... 18
APPENDIX 3 F790/F7298 plan and profile drawing ……….…..………………….. 19
APPENDIX 4 ENERGEX IS(C)E intermediate tower geometry……….………….. 20
Page 13
J&P Richardson Industries Pty Ltd -1-
1 INTRODUCTION
1.1 Property description
The subject property is lot 53 on SP163571 located at the intersection of Hollett Road and
Walter Hay Drive, Noosaville. As shown in Figure 1 below, Lot 53 is split by existing
transmission lines that are located on an established ENERGEX easement.
Figure 1 Location of transmission infrastructure on subject property
1.2 Proposed subdivision
The development proposal involves the subdivision of lot 53 into 39 low density and 1 rural
pursuit lots in three stages (refer subdivision plan shown in Appendix 1).
In its response to the development proposal, ENERGEX has suggested that the
prospective magnetic field levels be investigated for properties immediately adjacent to the
line – particularly lots 25-30, 39.
Hollett Road EMF Study V1.0
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J&P Richardson Industries Pty Ltd -2-
1.3 Purpose of Study
The purpose of this study is to provide a comprehensive response to ENERGEX’s request
for an EMF investigation and report. In particular consider each of the following criteria:
1. Current and future levels of EMF at the common boundary of easement B on
RP177295 and the proposed lots.
2. Compliance with applicable standards
3. Incorporating the principles of prudent avoidance into the development
The study will consider the proposed subdivision layout with regard to the existing and
possible future scenarios for the transmission assets located within the easement corridor.
1.4 Methodology for assessing magnetic fields
The initial step is to calculate the electric and magnetic field levels at the respective
easement boundaries associated with an average value of load current through the
transmission circuits. These values will be compared with a low-level target for magnetic
field identified in the industry as broadly acceptable.
Should calculated average values require mitigation, additional measures within the scope
of prudent avoidance will be considered. As modification of the ENERGEX 132KV
transmission line would be prohibitively expensive, the measures will focus on changes
within the lot layout / building position within the subdivision development itself.
1.4.1 Relevance of magnetic versus electric fields
The main focus of this report is in the calculation and minimising of magnetic fields
associated with the ENERGEX high voltage lines. The majority of concerns regarding
power frequency fields and possible negative impacts on human health have been directed
toward magnetic fields.
Electric fields are of a lesser concern, and are at very low levels for circuits energised at
distribution voltages. Therefore electric field strengths will be listed in the report for
completeness only.
Hollett Road EMF Study V1.0
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J&P Richardson Industries Pty Ltd -3-
2.0 THE TRANSMISSION LINES
2.1 Transmission line alignment and route
2.1.1 Network connections
The ENERGEX easement crossing the Noosaville property contains a double circuit
concrete and lattice steel tower lines supporting conductors energised at 132kV.The
associated circuits form part of the ENERGEX North Coast sub transmission network.
As shown in Figure 2 below, the two circuits provide a 132kV connection from SSSRH
Sunrise Hills substation to SSNVL Noosaville substation. When the lines were constructed
(around 1983) they ran from Cooroy to Noosaville directly (as F796 and F797) – being later
cut into SSSRH.
There is no 132kV distribution bus at SSNVL – each feeder terminates directly onto the
primary side of a 132kV/11kV transformer. The 11kV SSNVL bus is also normally open,
meaning that the two 132kV feeders do not operate in strict parallel (the loads can be
different).
Figure 2 Part of North coast 132kV sub-transmission network
2.1.2 Line / structure description F7298/790
Intermediate line structures are of concrete monopole construction incorporating composite
offset post insulation. An additional standoff bracket has been added between the pole and
insulator base to provide a climbing corridor on the structure.
Lattice steel towers appear to have been used on strain structures.
The line is a dual circuit six conductor configuration (single 37/3.00 AAC “SATURN”
conductor per phase) with single overhead 18.2mm “Cossonay” (OHEW) earth wire. The
lines have previously been phased for the minimum field arrangement (diagonal phasing).
From ENERGEX records the design temperature of the 132kV lines was 80°C.
Hollett Road EMF Study V1.0
Page 16
J&P Richardson Industries Pty Ltd -4-
2.2 Particulars in relation to Hollett Road property
An easement in the order of 26.5 metres wide has been established over lot 53, with the
transmission line located just offset from the centre of the easement (approximately 0.55m
closer to the southern boundary - refer Appendix 2).
As shown in Figure 1, there are a number of spans of 132kV mains on lot 53, but only two
that impact on the subject area within the development :
Pole 303669 to Pole 303670 and
Pole 303670 to Pole 303671
Relevant data for the three poles involved is summarised in Table 1 below.
Table 1 Pole details
BOTTOM CONDUCTOR POSITION
TOWER OVERALL HEIGHT
TYPE2 Height above ground Offset
NUMBER (m)
(m) (m)
303669 IS(C)E-0 19.5 13.79 2.3
303670 IS(C)E-0 23.6 17.903 2.3
303671 IS(C)E-0 19.51 13.791 2.3
Note 1 : Pole and conductor heights sourced from ENERGEX plan and profile drawings.
Details for new P303671 were not provided, so it was assumed identical to
P303669.
Note 2 : Detailed outline for the intermediate structure types IS(C)E shown in Appendix 2.
Note 3 : As surveyed.
2.3 Feeder Loading analysis
2.3.1 F790 / F7298
Loading for each of F790 and F7298 was determined by analysing load data supplied by
ENERGEX for representative days as summarised in Table 2 below .
Table 2 132kV feeder loading Sunrise Hills to Noosaville substation
Average daily loading (A)
Season reference
F790 F7298
Summer weekday (SWD) 75.38 62.62
Summer weekend (SWE) 47.53 50.94
Winter weekday (WWD) 36.76 37.46
Winter weekend (WWE) 37.63 42.55
OVERALL average (OAV) 52.5 50.9
Note overall average load calculated as :
OAV = [5*(SWD+WWD)/2 + 2*(SWE+WWE)/2]/7
Hollett Road EMF Study V1.0
Page 17
J&P Richardson Industries Pty Ltd -5-
A margin of 20% should be added to the above values to allow for system load growth.
Final currents are 63A and 61A for F790 and F7298 respectively.
The range of variation in load over a typical summer day for 132kV F790 is shown in Figure
3 below.
Figure 3 F790 Daily Load curve 21/1/2020
AVE = 75.4
2.4 Scenarios for future development
2.4.1 Network connections
There is no indication that the circuit connections at 132kV (or 11kV feeders out of SSNVL)
are planned to be altered in the foreseeable future.
2.4.2 Load criteria
Magnetic field studies will be based on an average load calculation for each circuit (24hr
365day). An escalation of 20% has been applied to the average present day load to
account for future load growth.
Hollett Road EMF Study V1.0
Page 18
J&P Richardson Industries Pty Ltd -6-
3.0 BACKGROUND ON MAGNETIC FIELDS
3.1 ARPANSA and ENA
ARPANSA stands for the Australian Radiation Protection and Safety Agency. ARPANSA is
a federal body that monitors and identifies solar radiation and nuclear radiation risks across
a wide frequency spectrum to the population of Australia.
The Energy Networks Association (ENA) is the peak national body representing gas and
electricity distribution businesses throughout Australia. ENA has specific interest in electric
and magnetic fields at power frequency (50Hz).
In January, 2016 the ENA published the “EMF Management Handbook” which is
considered to be the most up to date reference on the topic for Australian power networks.
3.2 Australian Guidelines
The ENA handbook lists two sets of internationally recognised guidelines on EMF :
a) International Commission on non-ionising radiation protection ( ICNIRP )
“Guidelines for limiting exposure to time-varying electric and magnetic fields ( 1Hz-
100kHz )” : 2010.
b) IEEE International committee on Electromagnetic safety on non-ionising radiation
“IEEE standard for safety levels with respect to human exposure to electromagnetic
fields” :2002.
As ARPANSA directly references ICNIRP 2010 as a guideline for exposure, the ICNIRP
document will be used as the primary source for EMF levels in this report. It is noted that
the IEEE guidelines provide an alternate set of limits which could be applied to specialist
exposure environments.
The reference levels for EMF exposure as listed in the ICNIRP guidelines ( Table 5-2 and
Table 5-3 ENA Handbook ) are shown in Table 3 below.
Table 3 ICNIRP reference levels for 50Hz EMF exposure
ELECTRIC FIELD MAGNETIC FIELD
EXPOSURE TYPE STRENGTH STRENGTH
(V/m) ( mG )
Occupational ( General ) 10000 10000
Occupational ( head and torso) Not specified Not specified
Occupational ( arms and legs) Not specified Not specified
General public ( General ) 5000 2000
General public ( head and torso) Not specified Not specified
General public ( arms and legs) Not specified Not specified
Hollett Road EMF Study V1.0
Page 19
J&P Richardson Industries Pty Ltd -7-
3.3 Prudent Avoidance
ENA recommends to members that they design, operate and maintain their networks
prudently with regard to EMF exposure. Prudent avoidance has been defined in an
Australian context by the former Chief Justice of the High Court of Australia, Sir Harry
Gibbs as doing what can be done without undue inconvenience and at modest expense to
avert the possible risk to health from exposure to new high voltage transmission facilities. In
practical terms, this means designing new Transmission and Distribution facilities having
regard to their capacity to produce EMF’s, and siting them having regard to the proximity of
houses, schools, and the like.
The ENA EMF handbook lists key guiding principles for applying prudent avoidance in
relation to EMF, including the following :
Measures to reduce exposure should be used if they can be implemented at ‘no
cost’ or ‘very low cost’ and provided they do not unduly compromise other issues.
There is no reliable scientific basis for the adoption of arbitrary low exposure limits
or setbacks or for a specific exposure level at which precaution should apply.
Prudent avoidance / precaution does not operate in isolation but rather is one of
many issues that need to be given due consideration in the design and operation of
the electricity supply system.
3.4 Electronic Devices
Cathode ray tube (CRT) based computer monitors are susceptible to interference from low
frequency magnetic fields. Immunity levels for CRT’s and other electronic devices are listed
in AS/NZS 4251.1 “Electromagnetic compatibility – generic immunity standard”, and are
summarized in Table 4 below.
Table 4 LF magnetic field Immunity limits for electronic devices
Device type Residential / commercial environment
CRT displays 12.5mG
Other equipment 37.5mG
Hollett Road EMF Study V1.0
Page 20
J&P Richardson Industries Pty Ltd -8-
4.0 MAGNETIC AND ELECTRIC FIELD CALCULATIONS
4.1 General Parameters
4.1.1 Load current
The average load currents to be used in all studies are 63A and 61A per phase for F790
and F7298 respectively (refer Table 2 S2.3.1) with both circuits energised.
The 10PoE loads for F790 and F7298 through to 2023/2024 in the most recent ENERGEX
132/132kV feeder forecast are 78A and 77A respectively.
4.1.2 Phasing
The phasing configuration on the double circuit line is as shown in Figure 4 S4.2.3. The
configuration is known as diagonal phasing and is the arrangement adopted to produce
minimum magnetic field level.
4.1.3 Height of field calculation
Height of field calculation above ground = 1m.
4.2 Average conductor height and geometry
A temperature of 50°C will be used as the reference for average phase conductor height
calculations.
4.2.1 F790/7298
Phase conductor : SATURN (design temperature 80°C)
OHEW : 1x18.2mm “Cossonay” OHEW
Average span : 207.5m
Stringing tension : 18.2% UTS (phase), 8.8% (OHEW)
Minimum clearance : 6.7m
Calculate average conductor height = (RL1+RL2)/2 – 2/3 *sag
Table 5A Average height lower phase conductor F790 / 7298
FROM TO AVERAGE
RL(m) RL(m) SPAN(m) SAG@50°C
POLE POLE HAG (m)
303669 13.79 303670 17.90 223 7.0 11.12
303670 17.90 303671 13.79 192 5.2 12.38
Table 5B Average height OHEW F790 / 7298
FROM TO AVERAGE
RL(m) RL(m) SPAN(m) SAG@25°C
POLE POLE HAG (m)
303669 19.59 303670 23.70 223 5.71 17.84
303670 23.70 303671 19.59 192 4.23 18.82
NB : HAG = Height above ground
Hollett Road EMF Study V1.0
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J&P Richardson Industries Pty Ltd -9-
4.2.3 Geometry
The magnetic field calculations will be based on the intermediate pole top construction
shown in Appendix 2 for F790/F7298. A simplified ‘stick figure’ representation of the
structure geometries is reproduced in Figure 4 below for convenience.
Figure 4 F790 / 7298 Intermediate construction geometry ( IS(C)E
0.09m
2.00m
AФ CФ
1.90
BФ BФ
2.30m
1.90
m
CФ AФ
4.3 Magnetic and electric field calculations
4.3.1 Scenario1 average feeder load
The results of electric and magnetic field calculations relevant to scenario1 are summarised
in Table 7 below and Figure 6 and figure 7 overleaf.
Table 7 EMF levels scenario1 average 132kV feeder load
Calculated value at edge of
4mG offset
PARAMETER easement Maximum
Northern Southern Northern Southern
Magnetic Field strength 0.54mG 0.71mG N/A N/A 1.83mG
Electric Field strength 0.139kV/m 0.113kV/m ------ ------ 0.329kV/m
Hollett Road EMF Study V1.0
Page 22
J&P Richardson Industries Pty Ltd -10- Figure 6 Magnetic Field profile : scenario1 Figure 7 Electric Field profile : scenario1 Hollett Road EMF Study V1.0
Page 23
J&P Richardson Industries Pty Ltd -11-
4.3.2 Scenario2 Feeder 10PoE load forecasted
The results of electric and magnetic field calculations relevant to scenario2 are summarised
in Table 8 and Figure 8 below and figure 9 overleaf.
Table 8 EMF levels scenario2 : maximum 132kV feeder load
Calculated value at edge of
4mG offset
PARAMETER easement Maximum
Northern Southern Northern Southern
Magnetic Field strength 0.83 mG 0.71 mG N/A N/A 2.26mG
Electric Field strength 0.136kV/m 0.113kV/m ------ ------ 0.329kV/m
Figure 8 Magnetic Field profile : scenario2
Hollett Road EMF Study V1.0
Page 24
J&P Richardson Industries Pty Ltd -12- Figure 9 Electric Field profile : scenario2 Hollett Road EMF Study V1.0
Page 25
J&P Richardson Industries Pty Ltd -13-
5.0 METHODS FOR REDUCING MAGNETIC FIELD LEVELS
5.1 Background
Magnetic field strength of a powerline is a function of a number of variables, including the
current through the transmission circuits, the distance from the line, and the physical and
electrical geometry of the conductors. As the current through the transmission lines
changes with time, the associated magnetic field is a continuously changing parameter.
The Electric Field strength is a function of the physical attributes of a line and the voltage to
which the line has been energised. As such, the Electric field strength at a particular point
will remain at the same order of magnitude over time.
5.2 Increasing distance from source
As the magnetic field strength decreases as distance from the source increases, the
separation from the distribution line to the habited areas should be maximised as far as
practicable.
It is noted that the net separation is a function of both the lateral and vertical ( ie due to
conductor height ) offsets.
5.3 Conductor geometry and phase configuration
Different arrangements of phase conductors can produce different magnetic field strengths
for the same line current. Equilateral triangular arrangements tend to be the most
favourable, producing more field cancellation than the common flat arrangements.
With multi-circuit lines the careful placement of conductors with respect to phase can
significantly reduce the net magnetic field. The example often used is the double circuit
vertical construction diagonally phased (A-B-C on one side, C-B-A on the other).
5.4 Conductor compactness
The compactness of a line can reduce the resultant magnetic fields by enhancing the field
cancellation effect between the phases.
5.5 Load current reduction and balancing
Load current can be reduced by supplying the load fed through the subject circuit by using
an alternate route or increasing the supply voltage. These options are rarely available.
5.6 Undergrounding
Undergrounding can be effective at reducing magnetic fields due to the very compact
positioning of the respective phase conductors. However, because undergrounding is far
more expensive than overhead construction, it does not often fall into the category of
prudent avoidance.
Hollett Road EMF Study V1.0
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J&P Richardson Industries Pty Ltd -14-
6.0 DISCUSSION
6.1 Summary of magnetic field calculations
The key results of sections 4.3 of this report with respect to magnetic field are summarised
in Table 9 below.
Table 9 Magnetic field levels for proposed 132kV constructions
CALCULATED MAGNETIC FIELD STRENGTHS (mG)
Scenario
Easement Easement
maximum
(North) (South)
1 0.54 0.71 1.83
2 0.71 0.83 2.26
Scenario1 represents the system normal configuration with inbuilt escalation in the average
132kV line currents to account to load growth. It therefore represents a ‘future’ average
magnetic field level. Scenario 2 represents a ‘worst case’ field with both feeders in service.
6.2 Assessment of magnetic field levels
It can be seen with reference to Table 9 and Table 3 that the calculated magnetic field
levels are several orders of magnitude less-than the maximum permissible exposure levels.
It is further noted that the calculated worst case magnetic field at the edge of the easement
is less than 25% of the widely adopted industry reference value of 4mG adjacent the
proposed lots. In addition the maximum magnetic field across the easement itself (under
the powerline) is significantly less than this reference value.
6.3 Application of prudent avoidance principles
Routine consideration must be given to measures that may reduce the magnetic field levels
at the site within the scope of prudent avoidance. Even very minor cost impacts may be
difficult to justify at this particular site given the very low prospective magnetic field levels.
6.3.1 ENERGEX transmission infrastructure.
The conductor phase orientation on the two double circuit tower lines is already configured
for minimum magnetic field level.
The only other way that magnetic field levels associated with the transmission circuits could
be reduced is by altering the physical construction of the support structures – by using
more compact or taller structures, or undergrounding.
Any of these changes would have either functional or significant cost impact and therefore
not be within the scope of prudent avoidance.
Hollett Road EMF Study V1.0
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J&P Richardson Industries Pty Ltd -15-
6.3.2 Subdivision lot layout
The main way that prudent avoidance is applied in subdivisions is to increase the distance
from the source.
Practical ways in which prudent avoidance can be incorporated into the plan development
include the following :
a. Not positioning buildings close to the property boundary abutting the
easement
b. Locating bedrooms and main living areas at the opposite end of the
residence where practicable.
c. Orienting lots so that the short end of the building is parallel with the axis of
the transmission lines.
The subdivision design has considered and applied prudent avoidance principles in the
latest subdivision layout plan (refer Appendix 1). It can be seen that a buffer zone between
the building envelope and the edge of the power line easement has been included. The
buffer zone will reduce the magnetic field levels within the dwelling and therefore lower the
resident’s long term exposure.
6.4 General Electrical safety considerations
The two main areas of hazard are as follows :
1. Direct contact with the energised conductors
Sub-transmission lines such as 132kV F790 and F7298 do not employ systems to
restrict earth fault currents and can be associated with very high fault currents.
Combined with the energised voltage level these circuits become very unforgiving of
inadvertent contact - likely to lead to serious injury or death.
2. Contact with a concrete structure during an earth fault.
When an earth fault occurs on the transmission line, current takes all paths to earth
back to the source, including through the structure foundation. This current flow causes
a rise in potential (voltage) on the pole. This potential can be a touch hazard to persons.
In order to minimise these hazards, it is recommended that any development within the
easement area :
Have prior approval of ENERGEX
Minimise the opportunity for persons contacting the concrete line structures (for
example keep walking paths a minimum of 5m from pole bases).
Minimise the opportunity for persons frequenting the area directly under the
conductors themselves.(for example play equipment kept as far as practicable from
the line itself).
Hollett Road EMF Study V1.0
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J&P Richardson Industries Pty Ltd -16-
7.0 CONCLUSIONS
7.1 Review of key criteria
An assessment of the proposed subdivision with regard to the report aims listed in S1.3 is
summarised in Table 10 below.
Table 10 Subdivision compliance assessment summary
Criteria Assessment
No Description Achieved Comment
Refer S2.4.2.
Calculations have considered No advice received from ENERGEX regarding any
1 current and future levels of EMF.
Y future (Planned) changes to the 132kV circuits or
their load (request submitted 30/1/2020).
Compliance with applicable
2 standards and industry practice.
Y Refer S6.2.
Refer S6.3.
Development incorporates the
3 principles of prudent avoidance.
Y ENERGEX line phasing already configured in
minimum field arrangement.
It can be seen from Table 10 above that the proposed subdivision layout meets the
required criteria with respect to magnetic fields associated with the ENERGEX 132kV
power infrastructure.
7.2 Assumptions and limitations
Safety issues concerning touch voltages in the vicinity of towers or preventing
access to high voltage towers or conductor corridors are not included in this study.
Load criteria for magnetic field studies based on the average and estimated
maximum current through each 132kV feeder based on the supplied data.
Magnetic and electric field calculations based on the geometry of the double circuit
intermediate constructions used on the line.
Magnetic and electric field studies based on an average phase conductor
temperature of 50°C.
Positioning on the easement assumed for F790 assumed to be 12.7m from the
southern edge.
STEVEN FLOWER B Eng B Sc RPEQ
SENIOR ELECTRICAL ENGINEER
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APPENDIX 1 PRELIMINARY DEVELOPMENT PLAN FOR HOLLETT ROAD, NOOSAVILLE
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APPENDIX 2 F790/F7298 Structure site survey drawing
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APPENDIX 3 F790/F7298 Plan and Profile drawings
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APPENDIX 4 Type IS©E double circuit 132KV Intermediate Pole Geometry
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