Tyhee reports positive results from completed drilling programs on the Ormsby and Bruce Lake Zones; commences resource revision

http://www.newswire.ca/en/releases/a...

VANCOUVER, Aug. 12 /CNW/ - Tyhee Development Corp. (TSX-V: TDC) (the
"Company") today releases results for the final 36 drill holes on the Ormsby
and Bruce Lake Zones of the Yellowknife Gold Project in Canada's Northwest
Territories.

<<
Highlights from the recent program:

Bruce Lake Zone:
- Hole NDM507: 12.0 metres (m) of 6.18 grams per tonne (gpt) gold;
- Hole NDM520: 4.0 m of 11.59 gpt gold; and
- Hole NDM523 13.5 m of 4.289 gpt gold.

Ormsby Zone:
- Hole NDM538 13.5 m of 5.67 gpt gold;
- Hole NDM533 8.7 m of 5.33 gpt gold; and
- Hole NDM533 6.0 m of 7.94 gpt gold.
>>

"The results from the 36 drill holes at Ormsby and Bruce Lake show
significant gold values and are in line with management's expectations," said
Dr. Dave Webb, Tyhee's president and CEO. "Now that we have completed the most
recent phase of our drill program on these two zones, the Company is
proceeding with a revised resource estimate which will further define and
extend the resource previously reported in the technical report dated June
17th, 2008."
The revised resource estimate, utilizing the 25,000 m of new drill holes
from 2007 plus additional holes drilled in 2008, is currently underway and is
expected to be completed within 60 days.
Maps of the drill hole locations are attached and are available on
www.sedar.com and www.tyhee.com.

To view maps of the drill hole, please visit:
http://files.newswire.ca/476/Ormsby_...

REVIEWED BY QUALIFIED PERSON, QUALITY CONTROL, AND REPORTS

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

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. A recently completed Preliminary Assessment
reported July 17, 2008 (NR S.9, R.11) reports positive economics at 3,000 tpd.
Three additional gold properties have been acquired within the Yellowknife
Gold Belt and further acquisitions are being considered. Results from all
properties have been positive with the Company's current exploration focus
directed to the Clan Lake and Goodwin Lake properties.

<<
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 on Bruce Lake Zone
------------------------------------...
Drillhole From To Interval Grade
------------------------------------...
(metres) (metres) (metres) gpt gold
------------------------------------...
NDM506 186.5 192.8 6.3 1.321
------------------------------------...
and 196.6 202.3 5.7 2.744
------------------------------------...
and 205.4 206.8 1.3 8.496
------------------------------------...
NDM507 127.0 128.0 1.0 23.557
------------------------------------...
and 138.5 150.5 12.0 6.178
------------------------------------...
incl 138.5 142.5 4.0 11.865
------------------------------------...
incl 143.5 146.0 2.5 8.672
------------------------------------...
NDM520 31.0 32.5 1.5 2.988
------------------------------------...
and 76.0 80.0 4.0 11.593
------------------------------------...
NDM521 85.0 86.0 1.0 1.602
------------------------------------...
and 97.0 98.5 1.5 1.561
------------------------------------...
NDM522 6.5 9.0 2.5 2.309
------------------------------------...
and 36.0 37.5 1.5 1.604
------------------------------------...
and 137.4 138.2 0.8 2.346
------------------------------------...
NDM523 0.8 2.5 1.7 3.714
------------------------------------...
and 42.6 44.0 1.5 3.130
------------------------------------...
and 92.0 93.3 1.3 1.671
------------------------------------...
and 103.4 113.6 10.2 2.120
------------------------------------...
and 159.0 172.5 13.5 4.289
------------------------------------...
NDM524 20.0 33.0 13.0 2.434
------------------------------------...
incl 20.0 27.0 7.0 3.824
------------------------------------...
and 84.5 90.5 6.0 1.670
------------------------------------...
NDM525 141.0 142.6 1.6 1.249
------------------------------------...
and 147.0 151.5 4.5 2.579
------------------------------------...
and 171.7 173.0 1.3 3.007
------------------------------------...
NDM526 231.0 242.7 11.7 0.965
------------------------------------...
incl 240.0 242.7 2.7 2.294
------------------------------------...
NDM527 323.0 324.0 1.0 1.907
------------------------------------...
NDM528 244.0 246.1 2.1 4.495
------------------------------------...
and 378.2 380.0 1.8 1.921
------------------------------------...
Drillholes NDM517, 518, and 519 did not intersect significant gold values.
True widths range from 60% to 90% of the interval reported.

Table 2: Recent diamond drillholes from Ormsby Zone
------------------------------------...
Drillhole From To Interval Grade
------------------------------------...
(metres) (metres) (metres) gpt gold
------------------------------------...
NDM508 197.0 198.0 1.0 1.005
------------------------------------...
and 216.5 218.1 1.6 2.914
------------------------------------...
and 362.0 367.5 5.5 1.082
------------------------------------...
NDM512 170.5 175.0 4.5 4.230
------------------------------------...
and 230.0 231.0 1.0 3.530
------------------------------------...
NDM513 167.0 171.0 4.0 7.932
------------------------------------...
and 188.5 196.0 7.5 1.202
------------------------------------...
and 203.5 205.0 1.5 2.087
------------------------------------...
and 220.0 224.5 4.5 1.681
------------------------------------...
239.5 241.0 1.5 1.558
------------------------------------...
NDM514 198.5 200.0 1.5 3.687
------------------------------------...
and 206.0 212.5 6.5 1.075
------------------------------------...
NDM515 45.5 47.0 1.5 2.091
------------------------------------...
and 64.7 66.0 1.3 1.058
------------------------------------...
and 134.0 135.5 1.5 67.987
------------------------------------...
and 189.5 195.5 6.0 4.364
------------------------------------...
and 222.5 227.0 4.5 1.094
------------------------------------...
and 261.0 265.5 4.5 5.102
------------------------------------...
NDM516 53.5 55.0 1.5 1.365
------------------------------------...
and 150.0 151.5 1.5 4.512
------------------------------------...
and 160.5 162.0 1.5 1.047
------------------------------------...
and 174.0 178.6 4.6 3.011
------------------------------------...
and 219.5 222.4 2.9 2.273
------------------------------------...
NDM529 65.0 67.0 2.0 1.387
------------------------------------...
and 188.5 204.0 15.5 2.311
------------------------------------...
incl 200.5 204.0 3.5 8.319
------------------------------------...
and 209.5 213.5 4.0 1.040
------------------------------------...
and 234.5 236.0 1.5 3.862
------------------------------------...
NDM530 99.5 101.0 1.5 4.347
------------------------------------...
and 159.0 162.0 3.0 5.064
------------------------------------...
NDM531 181.0 229.0 48.0 1.127
------------------------------------...
incl 195.0 202.0 7.0 2.622
------------------------------------...
and 212.0 218.5 6.5 2.603
------------------------------------...
NDM532 81.0 82.5 1.5 2.034
------------------------------------...
and 181.5 196.0 14.5 2.076
------------------------------------...
incl 181.5 186.0 4.5 2.435
------------------------------------...
incl 189.6 196.0 6.4 2.900
------------------------------------...
and 209.4 214.0 4.7 1.677
------------------------------------...
incl 211.7 214.0 2.3 2.487
------------------------------------...
NDM533 5.7 14.4 8.7 5.300
------------------------------------...
and 34.0 37.0 3.0 1.669
------------------------------------...
and 152.2 158.0 5.8 2.283
------------------------------------...
and 276.0 282.0 6.0 7.936
------------------------------------...
and 299.5 301.0 1.5 2.259
------------------------------------...
and 322.5 325.0 2.6 14.208
------------------------------------...
NDM534 170.5 171.8 1.3 2.629
------------------------------------...
and 280.0 287.0 7.0 1.401
------------------------------------...
and 293.5 294.7 1.1 1.170
------------------------------------...
NDM535 218.7 220.0 1.3 3.431
------------------------------------...
and 233.8 256.0 22.2 1.968
------------------------------------...
incl 233.8 246.5 12.7 2.235
------------------------------------...
and 260.5 269.0 8.5 1.089
------------------------------------...
and 279.1 283.2 4.0 3.960
------------------------------------...
and 287.4 290.2 2.8 1.556
------------------------------------...
NDM536 99.0 103.5 4.5 2.604
------------------------------------...
and 162.0 164.0 2.0 1.087
------------------------------------...
NDM537 31.9 33.0 1.1 1.490
------------------------------------...
and 244.9 246.4 1.4 1.323
------------------------------------...
and 258.4 292.0 33.6 1.039
------------------------------------...
and 294.7 296.0 1.3 1.032
------------------------------------...
NDM538 88.0 90.0 2.0 4.627
------------------------------------...
and 232.0 233.5 1.5 1.009
------------------------------------...
and 254.5 268.0 13.5 5.674
------------------------------------...
and 277.0 278.5 1.5 13.300
------------------------------------...
NDM539 228.5 231.5 3.0 1.709
------------------------------------...
and 237.5 239.0 1.5 4.936
------------------------------------...
and 246.5 248.0 1.5 1.422
------------------------------------...
and 269.0 278.0 9.0 3.649
------------------------------------...
NDM540 247.5 250.5 3.0 0.965
------------------------------------...
and 258.0 259.5 1.5 1.069
------------------------------------...
and 276.0 283.5 7.5 3.504
------------------------------------...
NDM541 10.0 17.5 7.5 1.807
------------------------------------...
and 111.5 113.0 1.5 1.475
------------------------------------...
and 128.0 129.5 1.5 1.012
------------------------------------...
and 244.9 248.0 3.1 10.164
------------------------------------...
and 251.0 252.5 1.5 1.078
------------------------------------...
and 264.5 267.5 3.0 1.386
------------------------------------...
and 282.5 285.5 3.0 4.221
------------------------------------...
Drillholes NDM509, 510, 511 did not intersect significant results.
True widths range from 60% to 90% of the interval reported.
>>

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