Show THE ROOSEVELT TUNNEL completion of long bore means much for cripple C creek eek district special correspondence denver colo nov 22 the completion of the roosevelt drainage tunnel at cripple creek is generally regarded as the most important development of the year in colorado mining the cost in round numbers has beben it will drain the mines of the district to a depth of feet below the present water level and it will make available for economical mining ore bodies whose estimated gross value is this estimate is based on an estimated average shaft depth of feet and a gross production of giving an average production of per vertical foot compared with the expense of pumping the cost of driving the tunnel has been insignificant according to estimates furnished by T R countryman the engineer in charge of construction there is gallons of water per vertical foot in the basin to be drained to this there is a con stant addition of 1000 gallons or more per minute on the basis of per million gallons the cost of pump drainage would be 5 per vertical foot or to the tunnel level and after the basin had been drained it would have been necessary to provide for raising from 1000 to 2000 gallons per minute to a height of feet concerning the rapidity and extent of the drainage that will be accomplished by means of the new tunnel opinions are some what at variance it is certain however that no immediate results can be expected in the el paso mine after the el paso tunnel was completed the water lowered about eight feet per month mr countryman does not expect that it will be more than ten feet per month by the new tunnel at this rate it will be nearly a year before the mines recover the first level below the present water level this done they will have an ample field for development and production until the un watering of the next level down is complete the total length of the tunnel from the portal to th the emain main water course just beyond the contact between the granite and the erupt ives is approximately three miles it has been driven through the hardest kind of rock pikes peak granite and so solid is the formation that except for a few feet at the portal no timbering has been beebi required the size of the tunnel will permit its use for transportation with a double track but this will not be practicable unless a mill is built at the portal to handle the ore whether or not the tunnel will be continued through the erupt ives of the old crater in which the ore deposits of the cripple creek district occur has not been decided in the opinion of the engineer in charge this will not be essential to its success as a drainage enterprise but would be justified by its value for development voluntary subscriptions have provided tiie the funds needed in the construction of the tunnel the cripple creek drainage and ana tunnel company was organized during the month of august 1906 under the laws ol 01 colorado and by its articles of in corpora tion was authorized to issue shares of the par value of 1 a share the work on the tunnel began in may 1907 most of it has been done under contract by A E carlton the original subscribing corporations together with the amounts subscribed fol low el paso consolidated gold mining company mary mckinney mining company elkton consolidated mining and milling company portland gold mining company golden cycle mining company granite gold mining company vindicator consolidated gold mining company united states reduction and refining company 1 colorado springs and cripple creek district railway company midland terminal and florence and cripple creeck railway companies jointly strong gold mining company work mining and milling company C K and N mining company eagle ore company gold dollar consolidated mining company old gold mines company 2500 doctor jack pot mining company 2500 gold sovereign mining and tunnel company 1000 total subscription since the original list was made c the subscriptions were voluntarily increased one fourth of the former amounts with the following supplemental donations made el paso mary mckinney elkton portland 13 granite gold mining company 5 golden cycle vindicator consolidated Consolidate dt united states refining and reduction company colorado springs and cripple creek railway 4 florence and cripple creek and midland terminal railway companies jointly strong gold mining company eagle ore company 1 gold dollar 2500 doctor jack pot mines company 1000 Strat tons cripple creek mining and development company copeland sampling company 2500 colorado springs clearing house association C S mining stock association 2500 first national bank of cripple creek 1000 victor bank 1000 city bank of victor 1000 cripple creek state bank 1000 cresson consolidated mining and milling company 2000 total subscriptions original supplemental independent total |