TSX Venture: TDC

VANCOUVER, Feb. 4 /CNW/ - Tyhee Development Corp. (TSX Venture, TDC) (the "Company") today announced results from the initial four diamond drillholes on its wholly-owned BigSky Property, Yellowknife NWT. Results include 1.5 metres (m) grading 4.823 grams per tonne (gpt) gold included in 3.0 m grading 3.209 gpt gold in B002 and 8.687 gpt over 0.7 metres included in 2.2 metres grading 3.462 gpt gold in B004.

	    Table 1. Recent results from the BigSky Property. 	    ------------------------------------------------------------------------- 	    Diamond           From           To        Width            Gold Grade 	    Drillhole      (metres)     (metres)     (metres)     (grams per tonne) 	    ------------------------------------------------------------------------- 	    B002              28.0         31.0          3.0                 3.209 	    ------------------------------------------------------------------------- 	        Incl          29.5         31.0          1.5                 4.823 	    ------------------------------------------------------------------------- 	        And           92.0         93.0          1.0                 0.685 	    ------------------------------------------------------------------------- 	    B003              37.7         38.5          0.8                 4.639 	    ------------------------------------------------------------------------- 	    B004              33.3         35.5          2.2                 3.462 	    ------------------------------------------------------------------------- 	        Incl          34.8         35.5          0.7                 8.687 	    ------------------------------------------------------------------------- 	        And           48.0         49.2          1.2                 0.505 	    ------------------------------------------------------------------------- 	    B001 did not return significant gold values 	    

Dave Webb, Tyhee's president and CEO said "These results demonstrate that the shear zones are large and carry significant gold concentrations. The first phase of our diamond drilling program on BigSky will test more than 50 specific priority targets. A second phase of diamond drilling will follow-up the targets identified in the first phase." Webb added "We are very pleased with these results. We have tested two shear zones 3 kilometres apart and hit gold values in both targets. We were expecting a success rate of approximately one intersection of a couple of grams of gold out of every five holes drilled at this stage, with every other hit approaching economic concentrations over widths of 1 to 1.5 metres. We have exceeded this discovery rate."

Results from the surface sampling program in 2007 identify mineralized shear zones extending over four kilometres in strike length and 500 metres in width across the eastern portion of the BigSky Property. Maps with these results and drillhole locations are available on the Tyhee website at http://www.tyhee.com/properties/big_sky.php

Three drills are currently on the BigSky Property and one drill is on the Ormsby Zone. The drills are currently shutdown for one week due to the extreme cold.

The current BigSky Property drill program is targeting a system of shear zones exposed over a 4 km strike length and 500 m width immediately north of the Giant Yellowknife Mine Property. The shear zone system consists of a series of chlorite carbonate schists that transect Kam Group volcanic rocks and associated intrusive and basement rocks. Individual shear zones are up to 20 metres wide and form subparallel networks separated by relatively undeformed rocks.

The adjacent Con and Giant Mines extracted over 13 million ounces of gold from altered and mineralized chlorite carbonate schists (shear zones) that transacted Kam Group volcanic rocks and associated intrusions.

	    Table 2. Location of diamond drillholes reported in this release. 	    ------------------------------------------------------------------------- 	                    Easting         Northing 	    HoleID          (metres)        (metres)        Azimuth         Dip 	    ------------------------------------------------------------------------- 	    B001             637333         6952603           090           -45 	    ------------------------------------------------------------------------- 	    B002             637333         6952603           090           -60 	    ------------------------------------------------------------------------- 	    B003             636970         6955457           090           -60 	    ------------------------------------------------------------------------- 	    B004             636970         6955457           090           -45 	    ------------------------------------------------------------------------- 	    

The Company's principal focus is the development of its Yellowknife Gold Project. The Yellowknife Gold Project consists of 6,625 hectares (15,481 acres) of mining leases located 90 km (56 miles) north of Yellowknife. The property hosts several areas of gold mineralization, including the partially developed Nicholas Lake Zone, the Ormsby Zone and the Bruce Lake Zone. A 1.2 million ounce measured and indicated gold resource plus a 353,000 ounce inferred gold resource has been identified on the property as reported June 20, 2007 (News Release S.8 R.11). Additional exploration properties within the Yellowknife Gold Belt, including the Goodwin Lake, Clan Lake, and BigSky Properties are being explored.

Sample Analysis and QA/QC Program

Tyhee completed fire assays on drill core samples using 30 gram aliquots with ICP-ES finish for gold analyses as well as a multi-element analysis on a 0.25 gm aliquot digested in a four acid leach and an ICP-MS finish, prepared at Acme Analytical Laboratories Ltd. in Yellowknife, and finished at Acme Analytical Laboratories Ltd in Vancouver. Tyhee conducts a rigorous QA/QC program of inserting blanks and duplicates in the field and standards in the laboratory. The laboratory also conducted their own independent QA/QC program including inserting their own standards and rerunning samples from pulped material and reject material. These results were provided to Tyhee. All standards, duplicates, blanks and check assays returned acceptable results. Mr. Val Pratico, P.Geol., the designated QP within the meaning of NI 43-101, has reviewed this release and approves of its content.

	    NO REGULATORY AUTHORITY HAS APPROVED OR DISAPPROVED THE CONTENT OF THIS 	    RELEASE. THE TSX VENTURE EXCHANGE DOES NOT ACCEPT RESPONSIBILITY FOR THE 	    ADEQUACY OR ACCURACY OF THIS RELEASE.  

Tyhee's shares trade on the TSX Venture Exchange under the symbol "TDC". For additional information, please visit the Company's website, www.tyhee.com.

For further information

Tyhee Development Corp., David Webb, President and CEO, Tel: (604) 681-2877, toll free 1-866-681-2877, info@tyhee.com