Revegetation of the Pardoo mine: planning to execution to monitoring - - PowerPoint PPT Presentation

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Aug 20, 2022 309 likes •511 views

Revegetation of the Pardoo mine: planning to execution to monitoring Stacey Gregory September 2018 Outline Site description Closure planning process Revegetation activities Revegetation performance Lessons learned Site

SLIDE 1

Revegetation of the Pardoo mine: planning to execution to monitoring

Stacey Gregory September 2018

SLIDE 2

Outline

Site description
Closure planning process
Revegetation activities
Revegetation performance
Lessons learned

SLIDE 3

Site Description

75 km east of Port

Hedland

11 open pits, six WRDs

and mining infrastructure

Mining commenced

2008 and finished 2013

SLIDE 4

Closure planning process

Development

f detailed

MCP Stakeholder engagement Revegetation plan & closure criteria Closure investigations Closure risk assessment

SLIDE 5

Closure risk assessment

Poor revegetation resulting from:

Hostile or insufficient growth medium
Inappropriate or poor quality seed
Grazing pressures
Poor climatic

conditions

Weeds becoming

dominant

SLIDE 6

Closure investigations

Topsoil
Growth medium alternatives
Substrate material properties
Surface treatments
Seed

SLIDE 7

Revegetation plan and closure criteria

Revegetation plan developed
Closure criteria developed to measure revegetation

performance −Revegetation was used as a benchmark for success −Cover species richness, plant cover, weeds and self-sustainability

SLIDE 8

Stakeholder engagement

Schedule of meetings to discuss:

−Closure planning process −Outcomes of closure investigations −Closure objectives and criteria

Detailed MCP and revegetation plan submitted

and approved

SLIDE 9

Revegetation activities

Reprofiling Armouring Topsoil Contour ripping Seed and fertiliser

SLIDE 10

Revegetation performance - climate

100 200 300 400 500 600 700 2014 2015 2016 2017 2018

Rainfall (mm) Year

Rainfall (mm) Long term average (mm)

SLIDE 11

Revegetation performance – Bobby WRD

Plant cover (%) Species richness Weed cover Key taxa seeding

SLIDE 12

SLIDE 13

Plant cover (%) Species richness Weed cover Key taxa seeding

SLIDE 14

SLIDE 15

Plant cover (%) Species richness Weed cover Key taxa seeding

SLIDE 16

SLIDE 17

Lessons

Document everything
Contractor selection

and management critical

Regular inspections –

grazing and weeds

Engage stakeholders

early

SLIDE 18

End

Thanks to Atlas Iron Limited – Brendan Bow
Questions?