🕐28.10.08 - 17:49 Uhr

Tyhee News Release - Tuesday, October 28, 2008



October 28, 2008 For immediate release

Release: Series 9 Release 14 TSX Venture: TDC
TYHEE REPORTS 25% INCREASE
IN THE MEASURED AND INDICATED GOLD RESOURCE FOR THE
YELLOWKNIFE GOLD PROJECT, NWT, CANADA

VANCOUVER, BC (October 28, 2008) -- Tyhee Development Corp.

(TSX-V: TDC) (the
"Company") today announced a revision to the Yellowknife Gold Project NI 43-101 resource
estimate for the Ormsby and Bruce Lake zones that was previously announced on April 3, 2008.
The new resource incorporates approximately 25,000 m of new drilling.

The Measured and
Indicated gold resource has increased by 25% to 1,593,000 ounces of gold, a net increase of
324,000 ounces of gold that includes the upgrading of 196,000 ounces of inferred gold from the
April 3, 2008 resource, and an increase of 128,000 ounces of gold from the new drilling.
"The 324,000 ounces of measured and Indicated gold represents a significant increase in
Tyhee"s resource at the Yellowknife Gold Project," said Dr.

Dave Webb, Tyhee"s President and
CEO.

"This increase is largely due to targeted drilling within the Ormsby and Bruce Lake zones
that was carried out during 2007 and the spring of 2008.

Together with the resource increase
announced on April 3, 2008 (NR S.9, R.6) Tyhee has maintained an average annual resource
growth profile of 200,000 to 250,000 ounces of gold per year since 2003."

Table 1.

Gold Resource on Yellowknife Gold Project (October 28, 2008).
Ormsby Nicholas Bruce Total
Category Zone Main Zone Zone Resource

Measured
tonnes 3,003,000 1,249,000 4,252,000
gold grade (gpt) 3.41 3.81 3.53
ounces of gold 329,000 153,000 482,000
Indicated
tonnes 7,898,000 1,484,000 791,000 10,173,000
gold grade (gpt) 3.42 3.32 3.31 3.40
ounces of gold 869,000 158,000 84,000 1,111,000
M&I
tonnes 10,901,000 2,733,000 791,000 14,425,000
gold grade (gpt) 3.42 3.54 3.31 3.43
ounces of gold 1,198,000 311,000 84,000 1,593,000

Inferred
tonnes 223,000 955,000 396,000 1,574,000
gold grade (gpt) 3.14 3.92 2.76 3.52
ounces of gold 23,000 120,000 35,000 178,000

Ormsby and Bruce Zones at 1.25 gpt cut-off are revised and presented here.

Nicholas Lake Main Zone at 1.1 gpt cut-off has been reported previously.
Figures are rounded for presentation
The Ormsby and Bruce Lake resource was calculated using inverse distance squared
estimations of 3 m cubic blocks constrained by geology.

A search ellipsoid of 90 x 60 x 30 m
was employed.

All assays are composited into 1.5 m lengths, and composites have a top-cut of
100 gpt gold.

The Nicholas Lake resource was reported April 3, 2008 (NR S.9, R.6) and was
calculated using inverse distance squared estimations of 1.5 x 5 x 5 m blocks located in two
domains.

A search ellipsoid of 50 x 34 x 5 m at elevations above 100 m and 60 x 40 x 5 m
below this elevation was employed.
Ormsby and Bruce Lake Geology
The Ormsby and Bruce Lake deposits are exposed over 2.6 km on surface, in the Ormsby
decline, in subdrifts, in crosscuts and in drill core.

Gold mineralization occurs in association with
sulphides and silicification in weakly foliated but strongly lineated brecciated metavolcanic
amphibolite.

Nicholas Lake Main Zone Geology
A 300 m by 200 m leucocratic felsic intrusive of quartz diorite to granodiorite composition is the
host for the Nicholas Lake gold deposit.

Auriferous quartz-sulphide veins occur in a shear zone
within, and on the southern margin of the intrusion.

Gold is closely associated with fractures and
open space fillings in sulphides or alone within quartz.

Scheelite occurs throughout the
granodiorite in concentrations of up to 20,000 ppm tungsten.

Underground development allowed
access at approximately 90 metres below surface.


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 belt,
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
Preliminary Assessment released on July 17, 2008 (NR S.9, R.11) demonstrated positive
economics.

Additional gold properties have been acquired within the Yellowknife Gold Belt and
exploration of these targets has confirmed significant gold values over multiple metres on two of
the three grassroots properties reported.

An aggressive drill program has been completed and
assays will be released as they are received and compiled.

As reported in NR S.9, R.18,
(October 17, 2008) all drills remain on the property but are currently inactive.

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.

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 please contact:
Tyhee Development Corp.

The Equicom Group Inc.
David Webb, President and CEO Tom McMillan
Tel: 604-681-2877 [toll free 1-866-681-2877] Tel: 403-536-5903

 




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