Breaking News

http://www.globeinvestor.com/servlet...

Tyhee extends mineralization in WK shear zone on BigSky Property, Yellowknife, NWT, Canada

08:00 EDT Tuesday, April 29, 2008

TSX Venture: TDC

VANCOUVER, April 29 /CNW/ - Tyhee Development Corp. (TSX Venture, TDC) (the "Company") today announced that 6 out of 9 drillholes into the WK shear zone have intersected gold values over a zone which extends in excess of 250 metres in strike length and to a depth of 60 metres (open).

"We have identified a gold-bearing shear zone over a significant strike-length, with gold values up to 8.69 gpt over 0.7 metres and 5.87 gpt over 1.2 metres," said Dr. D.R. Webb, President & CEO of Tyhee. "Additional shear zones will be evaluated in the current drill program before further definition drilling is continued on this shear zone as well as other structures that have demonstrated gold-bearing potential. Upon identification of additional gold-bearing shear zones, the largest and highest grade structures will be selected for further work."

    <<     Results from current diamond drill program on BigSky Property                        From              To       Thickness      Gold Grade     DDH            (metres)        (metres)        (metres)           (gpt)      B003(1)           37.7            38.5             0.8            4.64     B004(1)           33.3            35.5             2.2            3.46     Incl              34.8            35.5             0.7            8.69     And               48.0            49.2             1.2            0.51     B005              71.4            76.3             4.9            0.64     Incl              71.4            72.8             1.4            1.18     And               96.8            98.0             1.2            5.87     B006              83.8            85.0             1.2            1.35     B008              31.6            34.9             3.3            2.09     Incl              32.3            33.6             1.3            4.78     B013              36.0            38.0             2.0            1.62      (1) drillholes previously reported     Drillholes B007, 9 and 10 did not intersect significant gold values in     WK Shear. Drillholes B011, 12, and 15 to 19 and 23 tested a different     shear zone as did B022, 26, and 27, none of which intersected significant     gold values.     >> 

Diamond drilling is continuing with two drills currently active on the Ormsby Zone during break-up. The drill on BigSky has been temporarily shutdown and will restart again in May. Additional targets on Clan Lake, Goodwin Lake and at Nicholas Lake will be drilled as the three drills on our properties become available.

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. Three additional gold properties have been acquired within the Yellowknife Gold Belt and further acquisitions are being considered.

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. V. Pratico, P.Geol., the designated QP within the meaning of NI 43-101, has reviewed this release and approves of its content.

To view a map of the BigSky Drill Program, please visit:

http://files.newswire.ca/476/BigskyD...

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