Tyhee updates drill program, bulk sample and ongoing activities at its Yellowknife Gold Project



    TSX Venture: TDC

    VANCOUVER, April 17 /CNW/ - Tyhee Development Corp. (TSX Venture, TDC)
today provides updates on its 100% owned Yellowknife Gold Project, including
the completion of the winter road season and the results of additional
drilling. Drill results include 5.1 metres grading 11.51 grams per tonne (gpt)
gold in NDM425, 8.5 metres grading 4.26 gpt gold in NDM426, 2.4 metres grading
8.94 gpt gold in NDM421, and 2.5 metres grading 5.49 gpt gold in NDM424.
    This year's winter road season closed on April 9th. Tyhee successfully
completed its re-supply of the Yellowknife Gold Project prior to the closing
of the winter road. Highlights include:

    
    -   Crushing 3,400 tonnes of stockpiled mineralized rock from the
        underground sampling program and shipment of 10 tonnes to an
        independent laboratory.

        The bulk sample has arrived at the laboratory and will be processed
        to confirm the gold grade as well as determine certain engineering
        parameters for optimizing gold recoveries and assessing the nature of
        the waste streams.

    -   Refueling of 344,000 litres of diesel, propane and gasoline to site.

        The Yellowknife Gold Project now has sufficient fuel on site to
        complete another 12 months of operations.

    -   Transfer of 4,800 boxes of archived drill core from Nicholas Lake to
        our Main Camp for processing.

        An initial test of 4 drillholes identified numerous gold values
        outside of the quartz veins identified in the current resource
        estimate. All diamond drill core from the Nicholas Lake Property has
        been moved to Tyhee's main camp for resampling. This will quantify
        how much gold had not been sampled by previous operators.

    -   Completion of over 4,000 metres of new core drilling at Nicholas Lake
        Main Zone.

        This drilling will increase the quantity and improve the quality of
        the established resource as well as confirm continuity of
        mineralization.

    -   Installation of new analytical preparation laboratory at Tyhee's main
        camp. The laboratory is owned and operated by Acme Analytical
        Laboratories, Vancouver and remains independent of Tyhee.

        The sample preparation laboratory will speed-up the analytical
        process and reduces costs.
    

    Diamond Drilling

    Assay results from eight additional diamond drillholes have been received
and are summarized on Table 1.

    
    Table 1.  Significant drillhole results recently received from
              Yellowknife Gold Project.

    Drillhole          From          To       Width       Assay
    NDM419             22.0        23.5         1.5        3.06
                       30.0        32.5         2.5        7.58
                       36.8        40.7         4.0        1.94
                       50.4        55.1         4.8        3.50
                       68.0        70.6         2.6        2.49
    NDM420             34.0        35.0         1.0        2.12
                       42.5        43.7         1.2        5.30
                       51.5        55.5         4.0        1.59
                       59.5        63.0         3.5        1.68
    NDM421            112.5       114.9         2.4        8.94
                      125.9       127.0         1.2        3.21
                      136.3       139.0         2.8        3.85
                      144.5       146.0         1.5        2.41
    NDM422            164.5       166.0         1.5        1.66
                      174.1       175.4         1.3        1.78
                      227.0       229.6         2.6        4.98
    NDM423             43.7        47.0         3.3        2.40
                      319.6       322.0         2.5        3.83
                      340.0       345.0         5.0        2.30
    NDM424            163.0       169.3         6.3        1.32
                      330.5       333.0         2.5        5.49
                      363.5       365.0         1.5        2.84
    NDM425            215.5       219.0         3.5        1.91
                      227.0       228.5         1.5        2.06
                      269.6       274.6         5.1       11.51
    NDM426             44.5        47.5         3.0        3.08
                      110.5       119.0         8.5        4.26
    Incl              110.5       113.0         2.5       11.41
    True widths are estimated to be 70% to 85% reported width.


     Table 2. Location of drillholes reported this release. Coordinates are
              in NAD83 Zone 12, metres. Azimuth is true north.

    Drillhole       Easting    Northing     Azimuth         Dip
    NDM419           352903     7008258       127.5      -45.00
    NDM420           352953     7008321       127.5      -45.00
    NDM421           352953     7008321       127.5      -75.00
    NDM422           352930     7008612       127.5      -60.00
    NDM423           352935     7008525       127.5      -60.00
    NDM424           352930     7008612       127.5      -45.00
    NDM425           352926     7008550       127.5      -45.00
    NDM426           353020     7008467       127.5      -45.00
    Map is attached to release, and available on www.tyhee.com.
    

    Two diamond drill rigs have been relocated to the Ormsby Zone from
Nicholas Lake Main Zone.
    Dave Webb, Tyhee's President & CEO, reports "We are very pleased to have
met all of our logistical needs on the winter road this year. With the winter
haul completed on time and on schedule, we can continue development of the
Yellowknife Gold Project in a cost-effective manner. We have additional
diamond drillholes to refine the resource at the Ormsby Zone while we continue
to expand the resource on the Nicholas Lake Main Zone with new drillholes and
through the resampling program currently under way." "These drill results are
very good and continue to fill in the resource. Additional drilling in the
north-end of the Ormsby Zone, in the Bruce Lake and West Zones is expected to
add to and better define the resource in these locations."
    Drill cores are sawn along their entire length, with one half of the core
submitted for analysis and the other half retained on site for archival
purposes. Samples are submitted to Acme Analytical Laboratory, Vancouver,
Canada for preparation and analysis. Blank samples, duplicate samples (riffled
splits of coarse crush) and repeat analyses are conducted in addition to
analyses of gold standard samples. All samples are analyzed by fire assay
techniques on 30 gram aliquots with ICP-ES finish.
    David R. Webb, B.A.Sc. M.Sc. Ph.D., P.Geol. is the Qualified Person, as
defined by National Instrument 43-101, on the Yellowknife Gold Project and
this news release has been prepared under his supervision.

    See attached map at: http://files.newswire.ca/550/Tyhee.Yellowknife.doc

    About Tyhee Development Corp.

    Tyhee Development Corp. is a gold exploration and development company
currently focused on the historic Yellowknife Gold Camp, NWT, Canada. 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. The property hosts several areas of gold
mineralization, including the partially developed Nicholas Lake Main Zone, the
Ormsby Zone and the West Zone. Additional gold properties have been acquired
within the Yellowknife Gold Belt and reviews of historical data are ongoing.

    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:

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., Michael Joyner, Tel: (416) 815-0700 ext 275,
mjoyner@equicomgroup.com

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Tyhee Gold Corp.

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