158 WORGRET HILL AND WAREHAM WATER SUPPLY. 



Thickness. Depth. 



b. Stiff yellowish clay, compact, and rather Ft. In.' Ft. In. 



heavy, also mixed . . ..96 



c. Mixed bluish grey and yellow clays, 



rather gritty. The specimen sub- 

 mitted was merely a hand-rolled ball 4 . o 



d. Reddish ochry clay, staining the fingers 



like raddle . . . . . . i o 



e. Additional boring not detailed. Ter- 



minates in grey pipeclay . . 24 o 



Total D. (proved) .. 49 o 215 o 



In explanation of the above table, it may be stated there is no 

 longer any idea of making use of the top water,* and that all 

 the calculations as to supply refer to the second or main water. 

 This is considered to be sufficient in amount for all the require- 

 ments of Wareham, but unfortunately it takes so long to clear 

 from fine sand as to be detrimental to the pumps. It is worthy 

 of note that the normal water level in the Well stands at a height 

 of 91 feet from the surface. Pumping may lower the water level 

 in the Well to 97 feet below the surface, but no amount of 

 pumping can reduce the water level below this point. Hence, 

 Mr. Drew infers that there is a leakage in the upper six feet of 

 water, but that below this horizon there is no lateral escape. In 

 connection with this subject it may be useful to remember that 

 the whcle of the 62 feet 6 inches of the Second Sand-series 

 (C. of the column) is saturated, and these saturated beds rest 



* With reference to this subject, Mr. J. A. Drew writes as follows : In 1899, 

 the upper water was allowed to run by an overflow pipe through the side of the 

 well and fall to the bottom water ; it was frequently measured in July and August 

 of that year by timing how long it occupied to fill a 50 gallon bucket, and the 

 minimum flow was found to be 12 gallons per minute or 17,280 gallons per 24 

 hours. This water was allowed to run to waste many months without exhausting 

 the supply. The pump in the well is arranged so that this supply can at any time 

 be utilised. 



