1955 - 1966 - Explorations conducted by various companies - New Thurbois Mines, Ltd, Kerr Addison Gold Mines, Ltd, Agnew Lake Mines, Limited, and Quebec Mattagami Minerals, Ltd.
It was in 1966, when explorations on the Agnew Lake Property had taken place by the Quebec Mattagami Minerals, Ltd. Stakings that were made by the company during this time period had covered much of the geology over 26 claims in Hyman Township. For the most part, this area was widely being prospected during 1955, when parts of these claims were owned by New Thurbois Mines, Ltd., and the Kerr Addison Mines, Ltd in 1955 and 1956.
Much of the claim groups were held by Mattagami Minerals, Ltd, before an 80% interest was taken up in 1965, by Kerr-Addison Mines, Ltd. These claims became situated four miles west of Agnew Lake, and about 40 miles west of Sudbury. Access to the property was also done by a rough road that crosses the claim group, and its south end. Most of the north part of these claims were also reached by crossing Agnew Lake before a tractor road was developed that goes west from the gravel road running north from Worthington.
For the most part the Granite formation is rather cut by pegmatite dykes, which is heavily sheared, and faulted. The Granite is also known to stretch eastward towards Trill, and Drury Townships, and continues to the edge of the Sudbury Irruptive, and westward into Porter Township.
The southern part of the Granite Contact is rather known as fault line scrap that lies within a thick section of Interbedded quartzite. Other statements had stated that this interbedded quartzite was also associated with Greywacke and agrillite, which are considered to be Huronian Age. Much of the quartzite is also known for carrying interbeds of oligamictic quartz pebble Conglomerates that are uranium bearing. Additionally, the sediments are known to be mainly layers of dark colored, gabbroic material, that became determined as metamorphosed tuffs, and lavas. It also became reported by the company that the Granite Contact is commonly known to strike east-west, which had steeply dipping sediments to the south.
In 1955, the No. 2 Zone was additionally drilled by New Thurbois Mines, Ltd, that consist of 48 holes, totalling more than 15,000 feet. It was shortly determined that this exploration phase had uncovered a zone which was 3,000 feet in length, and was opened at both ends. Examinations of the ore in 1966, had showed that much of this area was within an argillite with apparent erosional conformity. Further examinations of the core had revealed that the erosional unconformity overlies the zones which locally removes parts of the conglomerate sections known as the "Upper Reefs 5 and 6.
It was in 1966, when Mattagami Minerals, Ltd. had re-sampled the core from previous explorations conducted by New Thurbois Mines, Ltd. Core from the Reef 3 Zone had indicated 800 tonnes per a vertical foot to 4000 feet. Assays that were obtained had rather range between 1.02 to 2.24 pounds of U3O8. Diamond drill core obtained from the Reef 4 Zone had indicated 1,350 tonnes per a vertical foot to 400 feet. Assays taken from the Reef 4 had range between 1.01 to 2.24 pounds of U3O8, During that time period the company had additionally calculated at total ore-reserve calculation of 860,000 tonnes down to 400 feet. Other statements from the company had suggest that the conglomerate should extend to a depth of 1,000 feet below the surface. Prior to the re-study it was rather shown that a total of 18 diamond drill holes, totalling 10,000 feet had all intersected the No. 3 Zone. A diamond drilling program was carried on by the Kerr Addison Gold Mines, Ltd. within 1965, and had totalled a length of 6,532 feet.
Examinations of the core retrieved had indicated that two reefs of importantance became outlined in the 1965 diamond drilling program. Assays taken from Reef A had indicated 2.05 Lbs of U3O8 per a tonne across 7.2 feet. Other estimations had indicated 4.97 LBS Tho2 per a ton across 7.2 feet. Other assays were taken from Reef B that indicated 1.41 LBS of U3O8 per a tonne across 10.5 feet, and 5 LBS. of Tho2 across 10.5 feet. Ore reserve estimations from this section were rather complex due to dilution difficulties with the Rare Earth Minerals.
1967 - Agnew Lake Mines, Limited, Controlled by Kerr-Addison Gold Mines, Ltd.
Agnew Lake Mines, Limited was known to have been incorporated in June, 1967, with a capitalization of 3,000,000 shares of no par value. A total of 750,006 shares were rather reported to have been issued during this time period of preparing development operations. During this time period the company had rather organized it self as the officers, and directors were as followed : J.H. Stovel as President, and director, E Futterer as Vice President, general manager, and director, F. R. Burton, J. L. C. Jenner, P.M. Kavanagh, and W.S. Row as directors.
More so the whole entire Agnew Lake Property during this time had comprised of 26 claims located in Hyman Township, within the District of Sudbury, Ontario, Canada. Other statements from the company had reported that it was controlled by the Kerr Addison Gold Mines, Ltd. Prior to this incorporation the Agnew Lake Property was now reached by a better means of access when a new seven mile long access road became constructed from this mine site to High Falls Road.
Development within 1967, had mainly been aimed at sinking the vertical, six compartment shaft to a depth of 76 feet below the shaft collar. Diamond drilling within this time period had consisted of 64 surfaces holes, totalling 18,435 feet in length. Some more development would also take place when the much needed structures were being built. This included a service building in order to house the cold and warm warehouse building, Mine Dry, Mine operating office, machine and mechanical shops, electrical offices, and crane-way. Even more development would take place when a hoist, and power building became constructed to house the skip, and cage hoists, compressor, mine plant heating boilers, and power distribution equipment. Prior to this the company would also construct a collar building in order to enclose the head-frame tower, with coarse ore, waste bins, and the crane-way to service this building. Predictions also became made when the Subsidiary company, and the controlling company wanted to place this mine into operation/production by 1971.
1968 - Agnew Lake Mines, Limited - Controlled by Kerr-Addison Gold Mines, Limited.
By 1968, the Vertical, Six Compartment Shaft was additionally sunk further as it reach a depth of 1,410 feet on Claim S127997. With sinking almost complete the company had also cut the 150, 300, 500, 700, 900, 1,100, and 1,300 foot levels at depths of 150.5, 297.5, 505.5, 704,5, 899.5, 1,102.5, and 1,298.5 feet. A total of 14 diamond drill holes totalling 3,589 feet were completed from underground, and two diamond drill holes, totalling 2,789 feet in length from the surface. . Development from the underground workings had mainly consisted of 1,420 feet of crosscutting, and 16 feet of raising. A lot of equipment also became added towards this mining operation within 1968. Most of this equipment was brought on site in order to fully start mining operations, and production by 1971. Some of the major construction during that time period was mainly confined to building the Hoist, and Power House, the Mine Service Building, and head-frame complex. Most of the mine lateral development, and shaft sinking was also contracted out to another engineering firm.
1969 - Agnew Lake Mines, Limited - Controlled by the Kerr Addison Gold Mines, Limited.
Mining operations at the Agnew Lake Uranium Property had continued operations from January, 1 to December, 29, 1969. By this time it was rather reported that the mining operation were once again expanded as the shaft was sunk from 2.001 feet to a depth of 3,411 feet below the shaft collar. Most development during this time period was confined to establishing loading pockets at 1,500,1,630, 1,700, 1,900, 2,100, 2,300, 2,500, 2,700, 2,900, 3,100, and 3,230 feet. In addition to this development, the company would also construct a level at a depth of 3,300 feet. Total lateral development completed during this time period had consisted of 4,344 feet of drifting, 2,506 feet of crosscutting, and 2,800 feet of raising. Some more construction would also take place when an explosive storage magazine was constructed on-site.
Further development which was completed had also rather confirmed the results indicated from diamond drilling. It was during this time period when the workings would become assayed, in which had a total ore reserve estimation had now sat at 7,750,000 tonnes of ore, averaging 1.80 LBS. of U3O8 per a tonne. This calculation was made to a vertical footage of 3,500 feet on the property of the Agnew Lake Mine. An additional 1,400,000 tonnes of ore with similar grade was also indicated on the Agnew Lake Min Property. .
Surface explorations resulted in stripping a total of 300,000 cubic feet of overburden in order to develop a Hydro-Metallurgical plant, and ore stock-piles area. A portion of this material, along with the shaft rock had also been used to construct a retaining dam in the tailing area for the control of mine efficiency. During this time the company had also went under metallurgical studies in order to permit process designs. For the most part, milling was place on hold as the company didn't want to construct it until the sale contracts were officially signed. Engineering during that time was also focus on the completion of a water treatment plant in order to remove potential pollution from underground, and stockpile drainage waters. Following this mine development the company would end up building four house, and sixteen town-house units in Esponola, Ontario, Canada.
Development on the Agnew Lake Uranium Property continued on-ward, as the total development footage had consisted of 5.231 feet of drifting, 3,578 feet of crosscutting, and 1,802 feet of raising. With this completed the mine now had comprised of a total development footage of 8,268 feet of drifting, 6,509 feet of crosscutting, and 4,524 feet of raising. Diamond drilling during 1970, had amounted to 159 diamond drill holes, totalling 20,091 feet in length from the surface.
A curtailment to the underground workings was rather suspended because of the prevailing low uranium prices within the market. For the time being this company, along with Kerr Addison Gold Mines, Ltd. had also place this project on Care and Maintenance.in hopes of higher uranium prices. Development during that time period was mainly being carried out from the sixth to the 1,300 foot level
Prior to building this mining operation the company would end up spending a total of $6,343,870 on building, and equipment. Another $9,032,768 was also added towards explorations, development, and other expenditures. Explorations to the end of 1970, had resulted in undiluted ore reserves to a depth of 3,500 feet, which indicated 2,500,000 tonnes averaging a grade of 2.10 Lbs. of U3O8 per tonne over a width of 6.3 feet in Zone 3. Anther ore indication of 4,400,000 tonnes grading 1.53 Lbs. per ton were indicated over 9.0 in Zone 5, and additional 1,400,000 tonnes grading 2.27 Lbs. of U3O8 per tonne over a 6 foot width in Zone 3 on the adjoining Kerr Addison Claim. From 1971 to 1975, the Kerr Addison Gold Mines, Ltd. had continued to under go studies on their leaching program on development waste. A small amount of underground ore was also reported to have been apart of this process which resulted in minor processing by leaching.
1975 - Kerr Addison Mines, Ltd
By 1975, the experimental uranium leaching program had rather continued at the Agnew Lake Mine by the Kerr Addison Mines, Ltd. For the most part this experimental procedures need to process a total of 100,000 tonnes of ore. Most of this leaching process had been commenced on the development stockpile on June, 1975, and underground in situ "leaching" had started in September, 1975. From all explorations it was rather indicated that the Agnew Lake Ore Reserves were estimated at 2,500,000 tonnes of ore averaging 2.10 pounds of U3O8 per a tonne. This also included an additional 4,400,000 tonnes averaging 1.53 pounds of U3O8 per a ton. Another additional tonnage of 1,400,000 tonnes averaging 2.27 pounds of U3O8 per a tonne on was calculated on the adjoining property.