Significant structures had also started to be developed and included 10 staff residence, carpenter shop, pump house, powder magazine, machine shop, concentrator building, service building, and a 250,000 gallon steel water tank. Company officials from the Pronto Uranium Mines, Limited had also installed a 250 Kilovolt ampere, a 550 volt, 3 phase, 60 cycle General Electric Generator, Some more equipment was also purchase, and included a two stage, 2,000 cubic foot per a minute Bellis, and Morcom Air Compressor driven by a 400 H.P electric motor, and a 1,000 cubic foot per a minute XVHE-2 Canadian Ingersoll Rand Air Compressor driven by a 200 H.P electric motor. Almost all the work within this time was being done under contract as the company only employed 4 miners. Nothing else had occurred within this time period of preparing this site for further production.
It wasn't till 1955, when a considerable amount of work had occurred within this time period, and was focus on expanding the newly developed levels. The information below provides the details on the new expanded levels, and their development within thit time period.
Level Drifting Crosscutting Raising
110 feet 2,452 feet 1,259 feet 439 feet
207 feet 2,560 feet 1,360 feet 957 feet
283 feet 821 feet 455 feet 497 feet
372 feet -------------- 257 feet 210 feet
464 deet -------------- 375 feet 354 feet
Some more diamond drilling had also taken place when 55 hole became driven, and totalled 25,940 feet from underground, and 23 holes totalling 1,104 feet from the surface. There was also significant amount of ore hoisted from the workings that end up totalling 78,596 tonnes. The 150 by 303 feet mill building was also completed, and had all the right type of machinery added. Much of this had included a Canadian Allish Chalmers Limestone Mill. eight Dorr Oliver Ion Exchange cells, two 10 foot Hardinge Ball Mills, a 30 by 42 inch Traylor Jaw Crusher, a 4 1/1 foot and 5 1/2 foot Symons Cone-Crusher.
Other building within the time period had also became developed, and included an Assay Office, a 102 by 112 foot service building, a hoist house, and crusher house. The Pronto Uranium MIne, Limited had also installed the two Canadian Ingersoll Rand, and onne Bellis and Morcom Compressors, and a 54 by 100 inch double drum Canadian Ingersoll Rand Hoist. In addition this had alos started up milling operations on August, 24, and continued to operate for the rest of the year, in which it treated 75,289 tonnes at a daily rate of 550 tonnes. A significant amount of miners also became employed, and ended up totalling a workforce of 224 employees.
All development within 1956, was being confined to all 5 producing levels, and an 26 degree adit was driven to a depth of 50 feet. Most of the work within 1956, had reached the ore-body limits of the first. and second level drifts. Some more work had also completed 40% of the ore limits on the third level of the Pronto Uranium Mine that year. Further expanding during that time period was also taking place on the four level, and had commenced in December, 1956. The development rate was also increased by the end of 1956, and had been continued to preparing levels for higher then normal production. Almost all this work was opening the eastern portion of that had a flatter dipp in the ore-body, and by faulting. Generally this whole entire eastern ore-body was being extensively developed by Drifting, and Crosscutting.
Almost all production that year had comprised of 396,260 tonnes of broken ore in the stopes, 8,404 tonnes of broken ore in stope preparation, and 1,631 tonnes of broken ore from development work. In addition it was reported that the average value of this ore had assayed 2.35 pounds of uranium per a tonne. The whole entire width of the ore-body had been mined from 8.1 feet, and the average stoping width was 9.0 feet. More so it was reported that the stope sections had also resulted in a dilution factor of 11 percent, which was base on ore zone widths.
The western part of the ore-body was widely developed by the room and pillar methods of stoping, and had unsupported openings. Company officials had also reported that the strike of the western ore-body was known to continue for a distance of 80 feet, In several case the company had supported this operation by developing roof bolts at the back of this stope.
Some more geological information had also stated that the eastern ore-body was mainly formed from faulting, and fracturing, which resulted in weaker back sections. Generally it was also stated that the stopes within the fault sections had been developed at a small size. This whole entire development procedure was also supported by roof bolting, and timber supports. Pillar supports are also used within the first level stopes as the ore-body is rather located near a swamp section. These conditions have place minimum of development on the first level stopes do to this down fall.
The information below indicates the total lateral development that was done on the levels to date.
Level Drifting Crosscutting Raising
110 feet 3,700 feet 1,434 feet 932 feet
207 feet 4,923 feet 1,951 feet 957 feet
283 feet 1.814 feet 468 feet 673 feet
372 feet 153 feet 303 feet 210 feet
464 feet ----------- 375 feet 354 feet
Diamond drilling within this time period had consisted of three holes, totalling 1,658 feet from ] surface explorations, and seven holes, totalling 364 feet from underground. There was also a significant amount of ore hoisted that year, in which it had totalled 405,513 feet. Milling within 1956, was also increased extensively from a rate of 1,000 tonnes of ore per a day to 1,200 tonnes. Almost all the production from the mill had it's own daily average of 1,109 tonnes of ore. Further information had stated that the mill had improved significantly from modifications, and improvements This whole entire upgrade was mainly aimed at improving the mill equipment, and metallurgical process.
There was also significant amounts of reserves that became outlined, and had totalled 700,187 tonnes of probable ore grading 2.62 pounds per a tonne of uranium. Diamond drilling within 1956, had indicated another 2,082,146 tonnes of reserves that graded 2.71 pounds per a tonne of uranium. Further indications had also calculated a total of 188,590 tonnes of surface pillar ore, which graded 3,09 pounds of uranium per a tonne. Another estimation had outlined 171,533 tonnes of possible ore, grading 2.11 pounds of uranium per a tonne. With further ore- reserves outline this had given the mine a total reserve estimation of 3,142,556 tonnes of ore, which had an average grade of 2.68 pounds of Uranium per a tonne. Nothing else had taken place during 1956, as the levels became extended to their limits, and new development had also taken place. As the mine continued to expand it was also reported that subsidiary company had started constructing more dwellings in Blind RIver, Ontario, Canada.
Mining operations at the Pronto Uranium Mine had continued to take place throughout 1967. In all production there was a significant amount of ore that became hoisted, and ended up totalling 505,700 tonnes of broken ore. A total of 472,900 tonnes of ore was broken in the stopes, another 30,000 tonnes had been broken in preparation of stopes, and 2,800 tonnes of ore was taken from development work. Grading of the ore that was milled during 1957, had assayed 2.55 pounds of uranium per a tonne. Several faults, and the degree in faulting had decreased in thickness of the ore. More so it was strongly reported that this had resulted in a gradual reduction in daily production per stope panel, although drilling and breaking efficiency was considered to have improved. It would also lead to an increase in roof bolting to maintain control of the backs within the fault areas.This also had resulted in an increase in the amount of stope preparation, and development work which was required per a stope panel. Production within the stope panel would also have to be increased in order to meet the quota. A new level was also cut and station on the mine 590 foot level of the No. 1 shaft The total lateral development on each of these levels is given below. Diamond drilling within this time period had also consisted of 12 surface holes, totalling 4,022 feet, and 19 underground holes, totalling 431 feet.
Level Drifting Crosscutting Raising
110 feet 3,700 feet 1,601 feet 832 feet
207 feet 5,617 feet 1,951 feet 957 feet
283 feet 2,827 feet 482 feet 673 feet
372 feet 3,026 feet 319 feet 402 feet
464 feet 389 feet 611 feet 646 feet
590 feet ------------- ------------- 162 feet
Milling operations within 1957, had treated a total of 507,122 tonnes of ore that year. It was also rather reported that that 1,200 tonnes was milled during the first 4 months, and increased to 1,500 tonnes for remainder of the 8 months. For the most part it was reported that the mill had an average production grade of 1,389.4 tonnes. Some more improvements to the Metallurgical results had also taken place when the company installed a washing thickener. This whole entire installation had occurred between the leaching, and filtration sections, and was completed in June of that year. Processing the ore was also challenging as it contained acid consuming constituents which had resulted in higher acid consumption, and higher lime consumption. In addition it was also reported that the company had added more equitment that included two Pachuca Tanks, and a Buflo-Vak Twin Drum Atmospheric drier. There was also a plant expansion program which allowed the mill to increase its production from 1,200 tonnes to 1,500 tonnes of ore per a day.
Further estimations of the ore reserves within the Pronto Mine had slightly decreased within this year. Most of this became cause because of dilution issues within the core samples, and the faulting that had decrease widths of the ore-body. But further drilling had improved these estimations when high-grade ore was encountered during diamond drilling. In total estimations it was reported that this mine had 824,421 tonnes of probable ore, grading 2.44 pounds of uranium per a tonnes. Some more drilling had also indicated 1,618,737 tonnes of ore that graded 2.32 pounds of uranium per a tonne. Even some of the pillars had also became added to the ore-reserves that totalled 197,634 tonnes, and graded at 2.31 pounds of uranium per a tonne. In total calculations it was also estimated to contain a reserve of 2,460,792 tonnes, which had a grade average of 2.36 pounds of Uranium per a tonne. This would give the company a total of 6,223,004 pounds of uranium.
It wasn't till 1958, when the Pronto Uranium Mine was once again going under extensive development phase. More so it became reported that another level was being cut, and stationed on the mines 742 foot level. The mine was also undergoing its very own development phase when a total of 19,219 feet of lateral work was done. Most of this development had consisted 6,871 feet of drifting, and crosscutting with the remainder done of box holing, and stope raising. Almost all development within that your was increased by 898 feet, and was done on opening up the lower level, and extra footage to develop small ore blocks isolated by faulting.
Shaft deepening within 1957 had started at the end of December, and was completed by April, 1958. There was also significant amount of expanding and development taking place during that time period of operating. It was reported that the Pronto Uranium Mine, Limited would extended the ore and wast pass system below the 742 foot level. Other installations which had taken place included installing a new ore-loading pocket, and a new main grizzly below that level to. Almost all this development, and installations was officially reported to have been completed by October, 1958. Some more changes that occurred was to improve the performance, and productivity of the tramway system. With the completion of shaft sinking it soon had increased production on what was known as the 590 foot level or the 5th level. Diamond drilling within 1958, had increased rapidly when a total length of 4,115 feet was completed from underground. Further predictions had stated that it was necessary to increase diamond drilling in order to gather more information on the structural faulting.
Company officials from the Pronto Uranium Mines, Limited would also hoist a large amount of broken ore that totalled 535,935 tonnes. For the most part it was stated that 95% of the ore taken was from stopes, and the remainder from stop preparations. Assaying of this ore had determined it to contain 2.54 pounds of uranium per a tonne of ore. The average thickness mined that year had been only extended to a width of 5.7 feet, compared to the 6.4 feet mined in 1957. Much of the stope sections within this operation had been mined by widths up to 5 or 4 feet within that year. In addition it was stated that the ore within these section had obtained high-grade ore from the narrow reefs mined that year.
All milling operations in 1958, had operated on a daily production rate of 1,507 tonnes of ore. In total production the milling facility had ended up treating 549,976 tonnes of ore that produce 1,297,943.36 pounds of uranum. All production that year was slightly increased do to acid concentration, and leach temperature. Some more predictions had also stated that the company had lost 37% reduction in tailing losses from previous years.
The total reserve within the Pronto Uranium Mine was now estimated at 1,808,448 tonnes of uranium, which graded 2.56 pounds per a tonne. For the most part it was reported that the decrease in the ore reserve was from information on development relating to the actual thickness of the reefs. Almost all the calculations had predicted 750,5128 tonnes of probable ore, grading 2.40 pounds of uranium per a tonne. Some more estimations had totalled 738,418 tonnes of drill indicated ore that graded 2.76 pounds of uranium per a tonne. At the time there was also another 319,502 tonnes of pillar ore reserves, grading 2.46 pounds per a tonne.
Some more work was continued in 1959, and was aimed determining the extension of the ore zone to the east. Surface diamond drilling also continued to take place within this time period, and a minor amount was done on the extension. Assaying from this area had soon revealed that there was negative results from all diamond drilling that year. There was also a re-calculation of the ore-reserves that had indicated 535,844 tonnes of proven ore reserves, grading 2.49 pounds per a tonne. Probable ore reserves within the Pronto Mine had also estimated 137,142 from underground development, grading 2.39 pounds, and 647,685 tonnes of diamond drill indicated reserves at 647,685, grading at 2.57 pounds per a tonne of uranium. In total estimation there was a reserve of 1,320,671 tonnes of ore with an average grade of 2.53 pounds of uranium per a tonne. Almost all development within 1959, had totalled 4,907 feet of drifting, 2,152 feet of crosscutting, and 380 feet of raising. The total development footage within this time period had totalled 24,350 feet of drifting, 10,103 feet of crosscutting, and 5,305 feet of raising. Diamond drilling had resulted in 191 holes from underground, totalling 9,976 feet, and 41 surface holes totalling 16,704 feet. Far more explorations also continued when the company had done 200 feet of trenching that year. Other major event had also occurred when the Pronto Uranium Mines, Limited had acquired all assets to the Pater Uranium Mines, Limited. Generally the whole entire uranium product was being contracted out to the Eldorado Mining and Refining, Limited, in which a new contract was made, and demanded for 1,508,000 pounds of uranium. Milling operations at the Pronto Uranium Mine had continued to operate through the year, and treated 576,690 tonnes of ore that year. Production from the Pronto Mill had produce a total of 1,320,620.1 pounds of uranium. By this time the Pronto Uranium Mine had shipped a total of 4,279,000 pounds of uranium to the Eldorado Mining, and Refining, Limited.
Mining operations at the Pronto Uranium Mine became shut down after a total of 149,528 tonnes was milled from January 1, to April 1960. Mining within the Pronto Mine had hoisted another large amount of ore that totalled 148,228 tonnes. Some more surface drilling was also done, and had consisted of 21 holes, totalling 1,643 feet from underground. Ore reserves at the pronto mine had been indicated at about 2,000,000 tonnes of ore grading 2.29 pounds of uranium ore. The Pronto Mine Mill was later converted into a copper concentrator in order to treat copper from the Pater Mine site for the next 10 years. All of this would take place from 1960 to 1970, when a road was created from the Pater Mine to the Pronto Mine Mill.