14^ KKVV YORK STATE MUSEUM 



The core saving varies from 73,^ to 84.6;^', making an average of 

 78.8;^. 



/ Holes 10, II, 12, 14, 16, 19, 20, 23, 24 and 27 penetrate Shawan- 

 gunk conglomerate a total of 1356.5 feet. Core saving varies in 

 different holes from 33.3,^ to 100;^. The average recovery is 60.52^'. 



g Holes 6, 10, 12, 15 and 16 cut Binnewater sandstone. The 

 total penetration is 205 feet. The range of core saving is from 

 30.6;;^ to 74.7^, with an average of 56;^ 



h Holes 7 and 9 cut Hamilton shales to a total amount of 65 feet. 

 The range of saving is 70;^ to 81.8^, with an average of 75.9;^. 



3 Artesian flows. Several of the borings struck artesian How 

 of water. The fact that the sources of this flow are not the same 

 has led to a tabulation of these data. 



RECORD OF ARTESIAN FLOWS 



Flow 

 Static Flow encountered 



Hole Size in head gallons at elevation 



no. inches in feet Minute Day Feet Strata 



10 I 18 30 43 200 — 109 



III 10 10 14 400 — 60 



12 y^ I — 24 



14 IM +90 



20 ^ 7.5 10 14 400 +108 



23 2 — 5 



31 2 +158 



39 i^ +112 



5NE Yz 12.4 .... 432 +203 



Binnewater sandstone 

 Shawangunk conglomerate 

 High Falls shales 



Shawangunk conglomerate 



Helderberg limestone 

 Hamilton shale (possibly 

 drift) 



Pumping experiments and porosity tests 



Systematic tests have been made for flow of water, behavior of 

 ground water and porosity of rock on certain of the Rondout ex- 

 ploratory holes under the direction of Mr L. White, division engi- 

 neer. A summary of these tests has been furnished by him from 

 which is quoted the following: 



In addition to determining the location and thickness of the beds 

 and the general character and condition of the rock from inspection 

 of the cores, serious attempts were made to determine the relative 

 porosity and water-bearing quality of the rocks encountered for 

 the following reasons, (i) To determine the probable leakage from 

 the siphon when in operation. (2) To determine the probable 

 amount of water to be handled in construction. These experiments 

 were divided into three classes: (i) Observation of flow from cer- 



