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March. 30, 1925. ¥.0. 4707 Mr. ¥, M. Barr, Consulting Chemist, Omaha, Hebraska. Dear S ir: As requested in your B-951 of March 23rd, I enclose herewith detailed estimate, together with drawing Ho. S-235J also print showing entire pipe lin e and work pro* posed in connection with Las Vegas water supply, as contem­plated "by 1925 Budget Item Ho. 98. The work proposed by 1925 Budget Item 98 in­volves a portion of the work under existing AFB Request Ho. 228 approved September 18, 1923, in that Mr. Mann now rec­ommends that we modify present authority to Include only new well and fence around Big Spring, replacing buildings, 300* of 8" and 2400 * of v it r ifie d pipe from springs, also concrete forebay. This w ill enable proceeding with work contemplated by Budget Item 98, on basis of in sta llin g concrete settlin g basin with 40’ of 20M wood stave pipe and Excelsior f i l t e r in water softener, also replacing 1460’ of 12" and 370V of 16tt VC pipe encased in concrete with the 1816* of 24” wood stave pipe, as it is very desirable to have a larger pipe at upper end to reduce losses in pressure from fric tio n . It is also desired to renew 1808’ of present 16" VC pipe at lower end, which is encased in concrete, with 16H wood stave pipe before pressure is increased by in s t a lla ­tion of 24* pipe, as this VC pipe is constantly giving trouble. The 16" wood stave pipe authorized has been purchased but delivery deferred due to d e s ira b ility of providing larger pipe fo r f i r s t section of the lin e. The total estimated cost i f handled on basis out­lined w ill be $22,170,, of which $10,175 w ill be chargeable to Capital Account and $11,995 to Operating Expenses, as against an , estimate of $11,840 provided in 1925 Budget Item 98. C . G . I - MAR 301925 3 — A A a Yours very truly, r T KNICKERBO CKER