Laserfiche WebLink
Non-Tributary Support: Cash Mine Borehole AdrlanBrown <br />2.4 Precipitation <br />The precipitation at Gold Mill, Colorado, is reported as being 19.5 inches per year. The monthly <br />distribution is shown in Figure 1. <br />Figure 1 - Precipitation at Gold Hill, CO <br />3.5 <br />3 <br />2.5 <br />C <br />0 <br />E <br />c 2 <br />C <br />O <br />B 1.5 <br />a <br />U <br />0 <br />a. 1 <br />0.5 <br />0 <br />Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec <br />2.5 Hydraulic Conductivity <br />The hydraulic conductivity of the bedrock material in the vicinity of the mine has been determined b} <br />considering the mine to be acting as a well, and computing the effective hydraulic conductivity of the <br />rockmass using the equation for steady state flow to a well (Theim, 1906'): <br />Q=2nLKH/ln(R./r) <br />K=Qln(R/r)/(2nLH) <br />where: Q= volumetric flo\? [L'T'] <br />L = length of open interval of well [I.] <br />K = hydraulic conductivity [LT-1] <br />H = head loss of floN\ to well [L] <br />R = radius of influence of well flow [L] <br />http://w%vw.cit%-data.com/ cit) i(fold-Fl it l-('olorado.html <br />Theim. G. Htl/ro/o,?rsnc? ,1/etlruclen. JA1.0cphardt. Leipzig. <br />1601A-20070125 2