Tri Origin has evaluated the potential to retreat in excess of 10 million tonnes of tailings that were deposited in three dams at Woodlawn,

With the aim of demonstrating the feasibility of the tailings retreatment operation, the stand alone Woodlawn Retreatment Project feasibility study was completed in early July 2008.

Before taking a final development decision, the Company will incorporate into the study:

 

·          An incremental Resource of 3.1 Mt of tailings (i.e. an increase of 36%) planned for recovery from the North, South and West Tailings Dams. Metallurgical test work is in process to confirm the expectation that the metallurgy of the material contained in the North Tailings Dam is consistent with tailings from the South and West Tailings Dams.

 

·          Results from a technical peer review process that will be undertaken to ensure optimum outcomes in terms of engineering, procurement and contracting strategy.

 

·          Results of discussions with potential off-takers of zinc, copper, and lead concentrates to firm up the potential marketing arrangements.

 

·          Results of review of alternative funding strategies and the selection of a preferred funding strategy.

Upgraded WRP Mineral Resources

Following receipt of assays from drilling completed in December 2007, Mineral Resource estimates have now been finalised and or revised for the three Tailings Dams from which tailings will be recovered and processed as part of the Woodlawn Retreatment Project.  Based on an independent assessment performed by GeoRes the combined tonnage of Measured, Indicated and Inferred Resource contained in the North, South and West Tailings Dams has been increased by 36%, and is made up as follows:

TAILINGS DAM SOUTH		Grade						Metal Content
		Zn	Cu	Pb	Ag	Au		Zn	Cu	Pb	Ag	Au
	Tonnes	(%)	(%)	(%)	(g/t)	(g/t)		(t)	(t)	(t)	(kg)	(kg)
Measured	2,430,000	2.60	0.48	1.19	24.6	0.22		63,180	11,664	28,917	59,729	535
Indicated	1,170,000	2.44	0.48	1.19	23.2	0.22		28,548	5,616	13,923	27,156	257
Inferred	900,000	2.32	0.47	1.19	23.9	0.23		20,880	4,230	10,710	21,510	207
Total	4,500,000	2.50	0.48	1.19	24.09	0.22		112,608	21,510	53,550	108,395	999
TAILINGS DAM WEST		Grade						Metal Content
		Zn	Cu	Pb	Ag	Au		Zn	Cu	Pb	Ag	Au
	Tonnes	(%)	(%)	(%)	(g/t)	(g/t)		(t)	(t)	(t)	(kg)	(kg)
Measured	2,050,000	2.00	0.60	1.46	35.7	0.39		41,000	12,300	29,930	73,103	800
Indicated	1,540,000	1.93	0.60	1.51	36.9	0.39		29,722	9,240	23,254	56,888	601
Inferred	480,000	1.83	0.61	1.47	33.7	0.38		8,784	2,928	7,056	16,171	182
Total	4,070,000	1.95	0.60	1.48	35.91	0.39		79,506	24,468	60,240	146,162	1,583
TAILINGS DAM NORTH		Grade						Metal Content
		Zn	Cu	Pb	Ag	Au		Zn	Cu	Pb	Ag	Au
	Tonnes	(%)	(%)	(%)	(g/t)	(g/t)		(t)	(t)	(t)	(kg)	(kg)
Measured	830,000	2.35	0.43	1.43	35.5	0.29		19,505	3,569	11,869	29,440	241
Indicated	1,380,000	2.68	0.45	1.44	39.9	0.29		36,984	6,210	19,872	55,117	400
Inferred	870,000	2.03	0.33	1.33	36.8	0.25		17,661	2,871	11,571	32,025	218
Total	3,080,000	2.41	0.41	1.41	37.85	0.28		74,150	12,650	43,312	116,582	858
TOTAL		Grade						Metal Content
		Zn	Cu	Pb	Ag	Au		Zn	Cu	Pb	Ag	Au
	Tonnes	(%)	(%)	(%)	(g/t)	(g/t)		(t)	(t)	(t)	(kg)	(kg)
Measured	5,310,000	2.33	0.52	1.33	30.6	0.30		123,723	27,612	70,623	162,274	1,593
Indicated	4,090,000	2.33	0.52	1.40	34.0	0.31		95,297	21,268	57,260	139,224	1,268
Inferred	2,250,000	2.10	0.44	1.30	31.0	0.27		47,250	9,900	29,250	69,705	608
Total	11,650,000	2.29	0.50	1.35	31.86	0.30		266,270	58,780	157,133	371,202	3,468

It should be noted that a proportion of the tailings contained in the South and North Tailings Dams is currently located under acidic water precluding drill rig access to these areas which makes accurate volumetric calculations challenging, hence the significant proportion of the Resource which has been classified as Inferred. Once full access to the tailings has been obtained and drilling completed, it is expected that the Inferred Resource estimates will be upgraded to Indicated and or Measured Resource status.