FIRST BORING STARTED AT BLACKALL.
Although the Hydraulic Engineer, so long before as December, 1884, had recommended the Minister to import American boring machinery with men trained to work it, it was not until 19th October, 1886, nearly two years later, that he was able to announce that his advice had been so far followed that Mr. Arnold, an American borer from Honolulu, had gone to Blackall with a Pennsylvania Walking Beam Oil Rig boring machine which had been constructed in Brisbane. It seems that so long previously as July, 1885, two tenders for boring by Americans—one being from Mr. Arnold—were submitted by the Hydraulic Engineer to the Minister, with the intimation that they were both too vague for acceptance, and expressing the hope that Mr. Arnold, "who seemed a man of considerable experience, would submit a more liberal and definite offer." The same report mentions that on the 30th June previously the Blackall bore had been carried to a depth of 775 ft., and that at 127 ft. good water had been struck that rose to a height of 60 ft. below the surface, but was deemed insufficient for the requirements of the town. Up to that time nine bores had been completed, chiefly by the ineffective Tiffin auger, but not one had reached artesian water, the deepest being that at Blackall, and the average depth 371 ft.
ARTESIAN WATER STRUCK AT THURULGOONA.
In his report of 12th November, 1887, the Hydraulic Engineer states that it is essential that only the best quality of tubing, or "casing," should be used in bores. In April he had visited, by direction of the Treasurer, Thurulgoona Station, on the New South Wales border, and there carefully inspected boring operations. He found that one bore had, by means of the Canadian Pole Tool boring machine, been sunk to 1,079 ft., a supply of excellent water having been struck at a depth of 1,009 ft., "the water overflowing in my presence to a height of about 20 in. above the surface of the ground." This was apparently the first artesian water Mr. Henderson had seen in Queensland, though he had years previously seen the artesian well at Sale, in Victoria; and he naturally pronounced the opinion that the result at Thurulgoona was "very satisfactory." During this year boring had been carried on in Queensland without success so far as the formation of flowing wells was concerned. Mr. Arnold, having sunk to 1,039 ft. at Blackall, resigned, but it was decided to continue sinking, all the tubing being recovered with the exception of a few feet, and being capable of use several times over if need be. During this year also tenders had been received from Mr. Loughead, of Thurulgoona, to put down three bores of 2,500 ft. in Queensland, and Mr. Henderson reported that there was every prospect of a tender being received from a company recently formed in Brisbane at a slightly lower price than Mr. Loughead had named.
GOVERNMENT'S FIRST FLOWING WELL.
It was at this time, after three years' fighting with difficulties arising from drought, the want of knowledge of deep-boring machinery, and the indisposition of the Government to spend much money in so speculative an undertaking, that the first gleam of daylight appeared. On 6th October, 1888, the Hydraulic Engineer reported that four contracts had been entered into for deep boring, with as many different persons or companies, in the aggregate over 20,000 ft. Included among these was the contract with the Canadian Pole Tool Company (of which the late Mr. Percy Ricardo was then the financial head, and Mr. William Woodley, who had been induced to come over from Canada, was the head driller) for completing the Blackall bore to a depth of 2,000 ft. if necessary. In this bore, on 26th April, 1888, after many vexatious stoppages, "an abundant supply of overflowing, sparkling, fresh artesian water, excellently adapted for domestic purposes, was tapped at a depth of 1,645 ft." The rate of flow, as measured from 3 in. piping attached to a screw plug and valve to control the flow, was found to be 210,000 gallons per diem, with a temperature of 119 degrees. This had been an expensive bore, for it cost £5,748. It was not the first artesian water officially utilised in Queensland, for four months earlier than water rose to the surface in the Blackall bore the Barcaldine bore was yielding 175,416 gallons of water a day, at a temperature of 101 degrees, obtained from a depth of 691 ft., and at a cost of only £1,220.
THIRTEEN ADDITIONAL BORES.
These results were so encouraging that the Hydraulic Engineer recommended the sinking of thirteen additional bores, and the recommendation was approved. As early as possible tenders were advertised, and there then seemed some difficulty in getting eligible applications, partly, it may be assumed, because of the activity of private enterprise in bore-sinking. To those engaged in this undertaking Mr. Henderson in his 1889 report pays a graceful tribute, congratulating them on their successes, and expressing regret at their failures, in which they only met the same luck as the Government had encountered. It was in this report also that the Hydraulic Engineer suggested that a map be prepared showing the position, altitude, and other useful particulars of all Government and private bores and wells in Queensland, and he invited information from all persons capable of giving it. Mr. Henderson mentioned the successful sinking of the Cunnamulla bore, having a flow of 22,500 gallons per hour of "excellent fresh water," with a pressure of 186 lb. to the square inch, a temperature of 106 degrees, and a depth of 1,402 ft. The total cost of this bore was £1,928. The success of the Tambo bore was also reported at the same time, 8,333 gallons per hour having been obtained at a depth of 1,002 ft., with a temperature of 98 degrees, and for a cost of £1,515.