70 



DIVISION OF WATER RESOURCES 



lion pumpiiifr was restricted because yields obtained from ordinary 

 stove-pipe \vells. which jienetrated the fine sands composinpr the water- 

 bearing: material, were not sufficient to make pumpin<? attractive, even 

 thougli the water table was near the surface. In drilling the gravel- 

 envelope wells, an 18-inch, clean-cut, perforated casing is landed at 

 depths of from 75 to 150 feet. From 25 to as much as 100 tons of gravel 

 is required to form the envelope on the outside of the casing. The pre- 

 vailing price of drilling is $3 per foot. Casing costs about $5.15 a foot 

 and rock is delivered for $2.35 a ton. The yields of these wells usually 

 range from 1200 to 2000 gallons per minute Avith ]iumping lifts of from 

 30 to 50 feet. The tabulation in Table 43 gives an estimate of the cost 

 of pumping from a gravel-envelope well 125 feet in depth using a 

 30-horsepower deep well turbine, capacity 1600 gallons per minute, 

 when the pumping lift is 40 feet. 



TABLE 43 

 ESTIMATE OF COST OF PUMPING FROM A GRAVEL ENVELOPE WELL 



Deep-well ti'rbine pump; assumed plant efficiency, 55 per cent; pumping lift 40 feet. 



Annual fixed charges and repairs, included in "other oharges" in the above table, are estimated as follows: 



Depreciation on well, 11,200 at 5 per cent $60 



Depreciation on pump, 11,600 at 5 per cent 80 



Interest on investment, $2,800 at 6 per cent 168 



Taxes, 30 horse power, at S0.75 per horse power 22 



Annual repairs on well and pump 130 



Total annual charges, except power $460 



Cost of Gravity Water in the Hanford Area, Kings County. 



The northern part of Kings County, in the vicinity of Hanford and 

 Lemoore, is served by three large canals and several independent 

 laterals. The water supply is obtained from Kings River, these canals 

 being understood to have rights subse(juent only to the Fresno Canal 

 in date of priority. The Peoples Ditch, the upper of the three main 

 canals, serves a gross area of a]>]>roximately 60,000 acres in the north- 

 eastern portion of the eounty. chic^fly 1o the north and east of TTanford. 

 Tlic Last Chance Ditch serves the central i)oi-tion of about 33,000 acres 

 now embraced in the Jjucerne Irrigation District, and the Lemoore 

 Canal serves the Lemooi-e lirigalion District of about 52,000 acres 

 in the Avesteru portion of the area. 



The diversions from Kings Kiver are made according to Schedule A 

 of the Kings Kiver Water Association. The schedule allotment for the 

 Lemoore Canal begins witli 70 second-l'eet with ;he i-iver stage at 200 

 second-feet. Tlie I'eoph's Ditch aUotment begins with 85 second-feet 

 with the i-iver stage at ;!()() second-feet and the Last Chance Ditch allot- 

 ment begins with 46 second-feet with the river stage at 450 second-feet. 

 The schedule allotments increase to a maximum of 450 second-feet for 



