454 GEOLOGY OF THE DENVER BASIN. 



38 and 40. Both the Spitzer (38) and Knight (40) wells, at a distance 

 of about 500 and 200 feet, respectively, from the well at the Western 

 Hotel (39), showed great diminution of flows upon the sinking of the 

 latter, that of the Spitzer well ceasing entirely. Upon casing the Western 

 well, however, these wells regained to a considerable extent their former 

 flows, that of the Knight well for a while becoming almost normal. The 

 flows have always shown themselves somewhat irregular. Both these wells 

 were long since abandoned. 



4") to 49. The Denver Water Company has sunk five wells near the 

 engine house, at the works. Three are situated in the angles of a triangle, 

 the sides of which are approximately 250 feet each, and were so placed as 

 to test the effect of wells near each other. In No. 1 the first water was 

 struck at 260 feet, which yielded 8 gallons per minute. A second flow 

 was struck at 348 feet, a third at 385, and the last flow at about 555 feet. 

 The total depth of the well is 587 feet. The flow at completion was 108 

 gallons per minute, and the total pressure 26 pounds. The second well 

 was similar in every respect, and reduced the flow from No. 1 about 

 one-third. Well No. 3 reduced the flow from the other two, so that the total 

 How from the three wells was but little more than that obtained from the 

 first well alone. Two other wells were sunk to about the same depths as 

 the foregoing at a distance from them of about 1,800 feet. The total flow 

 of the five wells was about 200,000 gallons per day. The casings of all 

 the wells were perforated at every flow and provided with rubber packing. 



Another instance of increase of flow after its diminution, by casing a 

 well — the Denver and Rio Grande No. 2 (50) — subsequently sunk in the 

 vicinity, is met with in the Water Works wells. This occurrence has been 

 quite frequent in the Denver Basin. 



52. The H. C. Brown well, at the corner of Sherman and Ellsworth 

 streets, was sunk in the fall of 1883. It is 995 feet deep and is cased for 

 100 feet with 7-inch, for 600 feet with 6- inch, and for 700 feet with 4-inch 

 casing, the last separating flows. Each of these casings was armed with a 

 steel shoe, and was firmly driven into solid rock. No packing was used. 

 The remainder of the well was sunk with a diamond drill, and was not 

 cased. Flows were cut at 685 and 850 feet. The first of these was 



