Significant Residual Impact criteria feeding, nesting, migration or resting sites) of a species.
Assessment
6.9.1.7. Grevillea hockingsii
Grevillea hockingsii only occurs in Queensland, where it is known from three disjunct areas: Coominglah
State Forest west of Monto with 21 occurrences in AVH (2025), then Callide Timber Reserve northeast
of Biloela with 11 occurrences in AVH (2025) and surrounding and within Mount Morgan with four
occurrences in AVH (2025). The specimens collected near Mount Morgan ranged from 1984-2001 and
were collected on Razor Back Range 3 km west of Mount Morgan.
The species is typically found on slopes in hilly sandstone country on shallow sandy to sandy loam soils
which are light brown to red in colour and occasionally stony or gravelly. It grows in woodland or open
forest communities typically dominated by Eucalyptus decorticans , Corymbia citriodora subsp.
variegata , Eucalyptus suffulgens or Eucalyptus acmenoides (DETSI 2025). The species has
occasionally been described on the edge of soaks.
A population survey was conducted for Grevillea hockingsii . The survey involved transversing all areas
within in G. hockingsii was confirmed. In total 67 individuals of G. hockingsii were confirmed within the
project area during field surveys. Individuals ranged from seedlings to mature flowering/seeding
individuals. All individuals appeared of good health. In addition to the above population, approximately
24.30 ha of essential habitat, and an additional 5.20 ha of suitable habitat, has been mapped for the
species within the project area. Suitable habitat for the species, within the project area, has been
describe as low woodland to open forests dominated by Corymbia citriodora , Corymbia trachyphloia ,
Syncarpia glomulifera and/or Acacia spp, on steep slopes and hill crests with shallow, well drained,
sandy loam soils derived from sandstone or basalt volcanic rocks.
Dumping of mine waste by previous site operators has resulted in land contamination across most of
the Mount Morgan Mine. Contaminated runoff and seepage from existing mine infrastructure are
actively contributing to land contamination. Prior to mining activities occurring at the Mount Morgan
Mine, the headwater of the Mundic Gully flowed north to south before flowing in an easterly direction
towards the Dee River. What should be the headwater of the Upper Mundic Creek is now an ephemeral
waterbody at the lowest topographical point of the Upper Mundic Gully that drains through a stormwater
diversion tunnel into Dam 8 located to the northeast, and as such less water is likely available within
the project area compared to prior to disturbance.
Additionally, the identification of several dense patches of WONS around and within the population may
further contribute to decline, both through competition and through increased fire risk and intensity
through larger fuel loads.
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Wulguru Technical Services Pty Ltd – Supporting Information to Amend an Environmental Authority
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