TSX Venture: TDC

VANCOUVER, Dec. 11 /CNW/ - Tyhee Development Corp. (TSX-V: TDC - News) today announced the final results of gold assays from the second phase of diamond drilling at Goodwin Lake and Clan Lake, Yellowknife Gold Belt, NWT, Canada.

	    Highlighted intersections from the recent program:

	    Goodwin Lake:
	    -------------
	     -  Drillhole GL022:     35.5 metres (m) of 1.83 grams per tonne (gpt)
	                             gold Including:
	                             16.5m of 3.33 gpt gold; and
	                             16.5 m of 1.40 gpt.
	     -  Drillhole GL024:     10.5 m of 8.38 gpt gold
	     -  Drillhole GL028:     6.0 m of 2.04 gpt gold

	    Clan Lake:
	    ----------
	     -  Drillhole CL134:     9.0 m of 1.50 gpt gold; and
	                             4.0 m of 2.01 gpt gold; and
	                             1.0 m of 29.20 gpt gold.
	     -  Drillhole CL137:     11.8 m of 1.27 gpt gold including:
	                             5.8 m of 2.17 gpt gold
	     -  Drillhole CL138:     10.0 m of 1.36 gpt gold; and
	                             4.3 m of 6.99 gpt gold.
	     -  Drillhole CL139:     2.7 m of 6.57 gpt gold
	     -  Drillhole CL140:     3.0 m of 13.09 gpt gold; and
	                             4.5 m of 13.93 gpt gold.
	     -  Drillhole CL141:     3.0 m of 5.29 gpt gold
	    

"The results from Goodwin Lake, together with the initial 20 drillholes previously reported, expand the VAD Zone, and define a significant new discovery in the Yellowknife Gold Belt, 13 km south of our established resource at the Ormsby Zone," said Dave Webb, President and CEO of Tyhee Development Corp. "While the Clan Lake results continue to expand the boundary of the Main Zone, additional zones have also been identified both to the east and west, suggesting the potential for additional gold mineralization at Clan Lake."

The Main Zone of Clan Lake has now been diamond drilled over a 400 m strike length (open) and in places to a depth of 300 m (open). While additional drilling will be required to confirm the continuity of the Main Zone, initial results appear to identify one or more gold-bearing zones cumulatively ranging up to more than 80 m in width in places within a domain that is up to 100 m wide. A resource estimate is being prepared, and is anticipated some time in the first quarter of 2009.

The Clan Lake Main Zone gold mineralization is associated with silicification, quartz veining, and quartz breccias with significant pyrrhotite and arsenopyrite disseminations. Previous work included trenching, diamond drilling, and a bulk sample. It is 485 m long, up to 65 m wide, poorly exposed to the northwest, and has not been explored in detail to the southeast.

Gold mineralization at Goodwin Lake is constrained within a strataform mafic rock of diorite composition within turbiditic metasediments. Macroscopically the rock appears unaltered with the exception of numerous irregular, discontinuous quartz veins. Minor sulfide enrichment accompanies some of the silicification. Microscopically substantial metasomatism is apparent with evidence of silicification and potassium enrichment. Tyhee will review the Goodwin data to determine if it is possible to establish a resource on the VAD Zone.

Maps that show the drillhole locations can be found at www.tyhee.com

Plans for winter drilling are in place, and the decision to commence will be deferred until late winter. Tyhee continues to extract the maximum value from its extensive database, continuing resource optimization and engineering studies while working to obtain production permits for its wholly owned Yellowknife Gold Project.

About Tyhee Development Corp.

Tyhee Development Corp. is a gold exploration and development company currently focused on the historic Yellowknife Gold Camp, NWT, Canada. It is the largest property holder in the historic camp, and has the largest exploration and development program underway in the region. Its principal asset is the advanced-stage Yellowknife Gold Project, which consists of 6,625 hectares (15,481 acres) of mining leases located 90 km (56 miles) north of Yellowknife, NWT, Canada.

Tyhee completed fire assays on drill core samples using 30 gram aliquots with ICP-ES finish for gold analyses, prepared at Acme Analytical Laboratories Ltd. in Yellowknife, and finished at Acme Analytical Laboratories Ltd in Vancouver. A semi-quantitative multi-element analysis is run on 0.5 gm aliquot samples leached in a hot aqua regia solution and measured using ICP-ES techniques. 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., Tyhee's Chief Geologist is 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.


	    Table 1. Recent diamond drillholes from Goodwin Lake.
	    -------------------------------------------------------------------------
	    DDH                       From            To     Thickness         Grade
	    -------------------------------------------------------------------------
	    GL021                     21.0          22.5           1.5          1.31
	    -------------------------------------------------------------------------
	      and                     40.5          42.0           1.5          3.42
	    -------------------------------------------------------------------------
	    GL022                      8.5          44.0          35.5          1.83
	    -------------------------------------------------------------------------
	     incl                      8.5          25.0          16.5          3.33
	    -------------------------------------------------------------------------
	      and                    101.0         102.5           1.5          1.09
	    -------------------------------------------------------------------------
	      and                    155.0         171.5          16.5          1.40
	    -------------------------------------------------------------------------
	     incl                    162.5         165.5           3.0          2.83
	    -------------------------------------------------------------------------
	      and                    168.5         171.5           3.0          2.24
	    -------------------------------------------------------------------------
	    GL023                     82.5          84.0           1.5         41.95
	    -------------------------------------------------------------------------
	      and                     94.0          95.5           1.5          3.15
	    -------------------------------------------------------------------------
	    GL024                      1.5          12.0          10.5          8.38
	    -------------------------------------------------------------------------
	     incl                     10.5          12.0           1.5         56.65
	    -------------------------------------------------------------------------
	      and                     25.0          31.0           6.0          0.86
	    -------------------------------------------------------------------------
	    GL025                    105.0         106.0           1.0          1.41
	    -------------------------------------------------------------------------
	    GL026                     60.5          62.0           1.5          1.09
	    -------------------------------------------------------------------------
	    GL027                     77.5          79.0           1.5          5.40
	    -------------------------------------------------------------------------
	    GL028                     29.0          35.0           6.0          2.04
	    -------------------------------------------------------------------------
	     incl                     29.0          30.5           1.5          5.73
	    -------------------------------------------------------------------------
	    True width is not known at this time.



	    Table 2. Recent diamond drillholes from Clan Lake.
	    -------------------------------------------------------------------------
	    DDH                       From            To     Thickness         Grade
	    -------------------------------------------------------------------------
	    CL134                     55.5          64.5           9.0          1.50
	    -------------------------------------------------------------------------
	      and                    167.9         172.0           4.1          0.84
	    -------------------------------------------------------------------------
	      and                    422.0         426.0           4.0          2.01
	    -------------------------------------------------------------------------
	      and                    438.0         439.0           1.0         29.20
	    -------------------------------------------------------------------------
	    CL135                      5.0           6.5           1.5          1.62
	    -------------------------------------------------------------------------
	      and                      9.0         10.55          1.55          1.08
	    -------------------------------------------------------------------------
	      and                     53.6          62.8           9.2          1.21
	    -------------------------------------------------------------------------
	     incl                     53.6          58.7           5.1          1.80
	    -------------------------------------------------------------------------
	      and                     73.7          74.7           1.0          1.45
	    -------------------------------------------------------------------------
	      and                    125.4         126.7           1.3         14.23
	    -------------------------------------------------------------------------
	      and                    195.5         196.8           1.3          1.88
	    -------------------------------------------------------------------------
	    CL136                     99.0         100.0           1.0         26.05
	    -------------------------------------------------------------------------
	      and                    138.0         139.0           1.0          1.02
	    -------------------------------------------------------------------------
	    CL137                     54.6          55.8           1.2          1.04
	    -------------------------------------------------------------------------
	      and                     77.6          88.2          10.6          0.72
	    -------------------------------------------------------------------------
	     incl                     77.6          78.5           0.9          3.61
	    -------------------------------------------------------------------------
	      and                    123.6         125.0           1.4          1.03
	    -------------------------------------------------------------------------
	      and                    148.2         160.0          11.8          1.27
	    -------------------------------------------------------------------------
	     incl                    148.2         154.0           5.8          2.17
	    -------------------------------------------------------------------------
	      and                    262.3         263.8           1.5          1.56
	    -------------------------------------------------------------------------
	      and                    278.5         279.5           1.0          2.56
	    -------------------------------------------------------------------------
	      and                    300.0         301.4           1.4          1.74
	    -------------------------------------------------------------------------
	    CL138                     44.3          45.6           1.3          1.96
	    -------------------------------------------------------------------------
	      and                     56.0          57.2           1.2          2.02
	    -------------------------------------------------------------------------
	      and                     62.5          64.0           1.5          1.71
	    -------------------------------------------------------------------------
	      and                     72.0          82.0          10.0          1.36
	    -------------------------------------------------------------------------
	      and                    250.0         254.3           4.3          6.99
	    -------------------------------------------------------------------------
	    CL139                    109.3         128.0          18.7          0.84
	    -------------------------------------------------------------------------
	     incl                    109.3         111.5           2.2          4.42
	    -------------------------------------------------------------------------
	      and                    163.0         165.7           2.7          6.57
	    -------------------------------------------------------------------------
	      and                    288.5         290.0           1.5          1.16
	    -------------------------------------------------------------------------
	      and                    312.0         340.0          28.0          0.73
	    -------------------------------------------------------------------------
	     incl                    312.0         314.8           2.8          2.45
	    -------------------------------------------------------------------------
	     incl                    337.0         340.0           3.0          2.71
	    -------------------------------------------------------------------------
	    CL140                     19.5          21.0           1.5          1.62
	    -------------------------------------------------------------------------
	      and                    116.5         119.5           3.0         13.09
	    -------------------------------------------------------------------------
	      and                    239.5         244.0           4.5         13.93
	    -------------------------------------------------------------------------
	    CL141                    130.0         131.5           1.5          1.18
	    -------------------------------------------------------------------------
	      and                    209.4         210.0           0.6          3.96
	    -------------------------------------------------------------------------
	      and                    304.0         305.5           1.5          1.34
	    -------------------------------------------------------------------------
	      and                    334.0         369.5          35.5          0.78
	    -------------------------------------------------------------------------
	     incl                    334.0         337.0           3.0          5.29
	    -------------------------------------------------------------------------
	    CL142                    139.5         160.0          20.5          0.82
	    -------------------------------------------------------------------------
	     incl                    139.5         141.0           1.5          1.72
	    -------------------------------------------------------------------------
	      and                    145.5         147.0           1.5          1.68
	    -------------------------------------------------------------------------
	      and                    159.0         160.0           1.0         10.66
	    -------------------------------------------------------------------------
	      and                    240.5         241.5           1.0          1.48
	    -------------------------------------------------------------------------
	    True width is not known at this time
	    

For further information

Tyhee Development Corp., David Webb, President and CEO, Tel: (604) 681-2877 (toll free 1-866-681-2877 ), info@tyhee.com
The Equicom Group Inc., Tom McMillan, Tel: (403) 536-5903 , tmcmillan@equicomgroup.com