✨ Report on Coal-fields
160
these seams would be attended with a very heavy
expenditure, in the construction of works and
machinery of more than ordinary character.
-
Now, as there are enormous beds of coal in the
valley of Coalbrook Dale, easily approached, in com-
parison with those in the Gorge of Waimangaroa,
immediate operation on the latter is not necessary, so
that my attention has been directed to the consider-
ation of the practicability of a line of railway, from
the head of Coalbrook Dale to Westport, that shall
not pass through Waimangaroa Gorge, as "the best
means of bridging the Gorge is mine." -
As the whole of the coal seams in Coalbrook
Dale are in the watershed of the Waimangaroa and
Wariatea Rivers, which are not tributaries to the
Buller River, and, as there is only one visible out-
crop of coal at the head of the River David, which is
a tributary to the Buller, it follows, that no part of
Coalbrook Dale mines would come within any part of
the land which it is proposed to give to any company
who will construct a line of railway from Nelson to
Cobden and Westport. -
This being so, and the Brunner mines, on the
River Grey, having been withdrawn from the limits
of the land to be given to the contemplated railway
company, there is no reason to hope, or expect, with-
out alterations in the limits of the land to be given
to the proposed company, that any capitalists will be
found willing to construct the main intended line of
railway in the valley of the Buller, and a branch
from thence, for the purpose of the mere working of
one outcrop of coal, situate at the head of the River
David. -
Under this state of things, "the best means of
bringing the coal to market" must be by an indepen-
dent line of railway, having no connexion with the
proposed main trunk in the Buller valley, and the
market must be Westport alone; and therefore, the
mines at Coalbrook Dale must be worked on a com-
paratively small scale, because the harbor of Westport
does not admit ships having of water, or sufficient
security at all times, for every kind of vessel to enter
into a coal trade. The export of coal from Westport
would, no doubt, be considerable, but must be confined
to small vessels frequenting the port at uncertain
intervals, and, from this cause, the annual export of
coal will vary very much. To remedy this there is
only one mode—that of employing steam colliers at
an increased cost upon the selling price of coal; but
these drawbacks would be avoided if the mines of
Coalbrook Dale were brought within the limits of the
land to be given to a company constructing the main
trunk railway from Nelson to Westport, for then
a branch line from Coalbrook Dale, down the slopes
forming the valley of the River David, and forming a
junction with the trunk line in the Buller valley, could
be constructed at a cost of about £70,000, or about
half the estimated cost of an independent line from
the mines to the Port of Westport; in which case the
two Ports of Nelson and Westport would be available
for the shipment of coal,—steam colliers would be
unnecessary, and a vast export of coal be insured. -
Assuming, however, that the present conditions
attached to the construction of the line of railway from
Nelson to Cobden and Westport to remain undis-
turbed, there is, in my opinion, no hope of that line
being carried into effect; and therefore, if I am right
in this opinion, an independent line from Coalbrook
Dale to Westport, having no connexion with the
main trunk line, is the alternative, and I shall now
proceed to consider that question. -
In Mr. Burnett's report on the Coalfields of
Mount Rochfort, he seems to have followed this
view; proceeding as if a direct line from the mines
to Westport was alone necessary; and enters, with
much care and consideration, into details; but,
although I must give that gentleman the fullest
credit for giving the subject considerable attention,
so far as the principle forming the basis of his views
is concerned, yet I cannot agree with that principle.
-
The line of railway, as proposed by Mr.
Burnett, would have to be worked by locomotives,
fixed engines and self-acting inclines. Now, though
what he suggests would give by far the shorter line,
and would be quite practicable, self-acting inclines
are especially to be avoided, when they are placed in
any part of a line of railway otherwise than at the
termini; for if they are otherwise placed, as in Mr.
Burnett's plan, they necessarily entail the cost of two
locomotive establishments, one below the self-acting
incline, and one above—the outlay for locomotives is
doubled, and the annual charges nearly so. -
The matter for consideration, therefore, is
whether it is cheaper to construct a shorter line of
railway, on Mr. Burnett's system, at a lesser cost,
but with larger annual charges; or a longer line,
upon which locomotives could run throughout, at a
larger outlay, but the least annual charges. I am of
opinion that the latter plan is the correct one, even
if the locomotive line was to terminate at Coalbrook
Dale, and was not at any time hereafter to be
extended; but, as the time will come when exten-
sion will be necessary, this should not be lost sight
of; for once having reached the Coalbrook Dale
line with a line of railway, then locomotive lines in
all directions become quite easy and inexpensive to
construct, and ramifications of the system may
extend to Mokihinui, Valley, to the Buller
by way of the river David, and almost to the very high-
est point of Mount Rochfort; thus opening out one
of the best and finest Coalfields that can be well
conceived. -
Believing then that a locomotive line of rail-
way is the most prudent to construct, and Mr.
Burnett having on his plans (2 and 3) given the
heights of various points, we the Buller then enabled
to ascertain the approximate length of such a line,
and, to a certain extent, the best direction as well.
There are, however, some considerations that must
be attended to, which are:—
A. The line must not on any account be
carried through the gorge of the river
Waimangaroa.
B. It should be carried at such a gradient down
the valley, as would touch the most
important seams of coal at about eight
feet below their level, and at the same
time enable a heavy train of coal-
loaded wagons to be hauled from the
mines over the saddle, dividing the
watershed of coal-brook Dale and that
of the river Wariatea.
- The first of these is necessary in order to avoid
extremely expensive works for a great length of line
and undesirable gradients; and by the second consider-
ation we are enabled to avoid the Gorge of Waiman-
garoa, touch the principal outcrops of coal in the
Dale, and conduct the line over the plateau at
moderate gradients, and on the whole, possess all
the advantage of having the least amount of gravity
to overcome, where their power is more required
than on any other part of the line, in the hauling of
coal-loaded trucks over a rising gradient; for, after
passing the saddle, we get descending gradients which
will be nearly uniform, and motion in the trains, on
the main portion of the remaining distance to West-
port would then be created by the gravitation of the
loaded trucks.
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🌾
Report on Mount Rochfort Coal-fields and Railway Construction
(continued from previous page)
🌾 Primary Industries & Resources31 July 1868
Coal-fields, Mount Rochfort, Railway, Westport, Coalbrook Dale, Engineering, Mining
- Mr. Burnett, Author of a report on Coalfields
Nelson Provincial Gazette 1868, No 37