458 GEOLOGY OF THE DENVER BASIK 



was cut at 575 feet. The 7§-inch pipe brought up the water from the first 

 large flow, at 325 feet, and from two small flows above, which it received 

 through perforations. The original pressure from the main flow was 45 

 pounds, and from the combined upper flows 35 pounds. The main flow 

 was in 1886 discharging at its original rate, while the upper flows had fallen 

 off somewhat. The discharge in 1886 was estimated to be over 500,000 

 gallons per day. In December, 1890, the well was pumped. According 

 to information obtained at the smelter the temperature of the water from 

 the two flows is the same, 65° F. 



98. The Hecker well, near the corner of Central and Eighteenth 

 streets, is another illustration of the effect of casing a new well upon the 

 flows of neighboring wells which the former had temporarily diminished. 



101. The Marquis well, at the corner of Platte and Seventeenth streets, 

 was sunk in February, 1884, to a depth of 290 feet. The work was 

 accomplished by hand, a spring pole being used, and cost but $175. It is 

 cased to a depth of 200 feet with 1-inch pipe and has a seed-bag packing. 

 The original pressure was 7 pounds. No decrease had been noticed in 

 February, 1886, but in October, 1890, the flow stopped, and in December, 

 1890, the water was pumped. 



A daily variation in the flow w T as noticed during its life, the discharge 

 being greatest at night and in the early morning. A slight increase was 

 also noticed during the months of June and July. 



108. The Shannon well, near the corner of Bert and Fay streets, about 

 95 feet above the Platte level, was sunk in the fall of 1883. It is 364 feet 

 deep and is cased to bed rock with 4^-inch casing. The original flow was 

 60 gallons per minute. This began to decrease soon after the well was 

 completed, and in two mouths had ceased entirely. The well was then 

 cleaned out, but did not again flow. This is supposed to be due to the 

 sinking of a number of wells in the low ground near the Platte. 



109 and 110. These wells are near 108 and have never been flowing 

 wells, their collars being respectively 90 and 140 feet above the level of 

 the Platte, and above those of numerous wells that had been already drilled. 



115 and 116. The two Eckhart wells, on Highland avenue between 

 Fourth and Fifth streets, were sunk respectively to the depths of 665 and 



