The Resource
208.09 Mt Inferred Resource in northern New South Wales
Sand and pozzolanic sandstone defined to 30 m drilled depth, under 97-year exclusive extraction and off-take rights.
Yammacoona Sand Quarry (Warialda Quarry), New South Wales
Location
Yammacoona Estate Road, Delungra NSW
Accessed via Adams Scrub Road, approximately 12 km south of Warialda in northern New South Wales, and approximately 470 km by road to the Port of Brisbane.
Location map
Source: SLR Consulting Australia Pty Ltd, Competent Person's Report, 26 November 2025
Site lots
Source: SLR Consulting Australia Pty Ltd, Competent Person's Report, 26 November 2025
Site
Five lots in the Gwydir Shire
Lots 5, 6, 7 and 8 in DP 264346 and Lot 5 in DP 263715 (Gwydir Shire). Flat to gently sloping terrain at 450–525 mRL, with a creek crossing the site.
Tenure & rights
Under a Deed dated 14 October 2025 with Claystone International Pty Ltd, UPSA holds, for 97 years, control of the extraction and concentration of the natural oxide and pozzolanic sands and sandstone resource, together with an exclusive off-take of that material.
The Deed consolidates land ownership in Claystone Masonry Pty Ltd and extraction rights and responsibilities in Claystone International Pty Ltd. An extraction rights agreement for Lot 5 in DP 263715 was signed in November 2025.
Topographic contours
Illustrative only, not to scale. Original figures: SLR Consulting Australia Pty Ltd, Competent Person's Report, 26 November 2025 — available on request.
Mineral Resource estimate
Inferred Resource by area
| Area | Sand (Mt) | Pozzolanic Sandstone (Mt) | Total (Mt) |
|---|---|---|---|
| Lots 5–8 DP 264346 | 33.27 | 127.41 | 160.68 |
| Lot 5 DP 263715 | 8.45 | 38.96 | 47.41 |
| Total Inferred | 41.72 | 166.37 | 208.09 |
Source: JORC Code 2012, Inferred — SLR Consulting Australia Pty Ltd, 26 November 2025; Competent Person: Tim Hunter, MAIG.
Total volume
93.64 M bcm
Sand density
1.7 t/m³
Sandstone density
2.4 t/m³
Defined to
30 m drilled depth
Resource defined to the base of the second pozzolanic sandstone bench (30 m drilled depth).
Pozzolanic sandstone by lot — Lots 5–8 DP 264346
Source: SLR Consulting Australia Pty Ltd, November 2025.
Depth potential
Below the current resource
The pozzolanic sandstone continues below the 30 m drilled depth; one deep borehole in Lot 7 intersected more than 80 m of pozzolanic sandstone, and regional state geology indicates thicknesses up to 80 m. SLR identifies further volume potential of approximately 226.10 Mt (Lots 5–8 DP 264346) and 37.64 Mt (Lot 5 DP 263715) below the current resource.
This potential is conceptual in nature. There has been insufficient exploration to estimate a Mineral Resource below the current resource, and it is uncertain whether further exploration will result in its estimation as a Mineral Resource.
Lots 5–8 DP 264346
~226.10 Mt
Conceptual potential
Lot 5 DP 263715
~37.64 Mt
Conceptual potential
Source: SLR Consulting Australia Pty Ltd, November 2025.
Figures
Profile, section and conceptual pit
Geological profile
Source: SLR Consulting Australia Pty Ltd, Competent Person's Report, 26 November 2025
Resource section
Illustrative only, not to scale. Original figures: SLR Consulting Australia Pty Ltd, Competent Person's Report, 26 November 2025 — available on request.
Conceptual pit design
Source: SLR Consulting Australia Pty Ltd, Competent Person's Report, 26 November 2025
Timeline
From consent to export
1988
Development Consent 32/97 granted
2016
EPL No. 20792 issued
Dec 2016
Consent modification 33/2016 approved
Oct 2025
Deed with Claystone International
Nov 2025
SLR CPR v2.0 — 208.09 Mt Inferred
Next
Infill drilling and testing to upgrade resource classification
Next
State Significant Development application
Future
Expanded production and export
Inferred Resources have a lower level of geological confidence than Indicated or Measured Resources and are not Ore Reserves. The estimate is based on a desktop study of historical data and requires further drilling and testing.