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Las Vegas - March 16, 1943 W 23-3-3 Mr. Frank Strong: Weir measurements were made of the production of the wells and springs yesterday, and I am attaching hereto the result thereof, together with a re-statement of the May 5, 1942 measurements for ready comparison. You will note an increase of almost half a million gallons per day. The weir boxes for the Big Spring and Well No. 2 are very well set with a straight run of at least 50 feet prior to passing over the weir, as recommended by State Engineer. However, the weir box for Well No. 1 is too close to the well and appears to be too short so that the velocity of the water distorts the reading. We measured 7^- inches on this weir box but this was obviously incorrect, so we checked it with a still pond and found 7 inches even which we have, shown in the attached table. . j The same difficulty is apparent at the weir box for Well No* 6* Thls miSht be remedied in a measure if the overflow pipe were trained in at the bottom instead of the top of the weir. I understand there are three pumps on hand here, intended for Wells No. 4, 7 and 9. No. 9 is now producing j^0ver a million gallons per day and ln-as-much as it has a wA (c. metal derrick it would probably be much better to move the derrick over to No. 10 and install a pump therein5 or if this is not desirable it could better be used on No. 8. The Wallace & Tiernan representative is here today to install the chlorinator in pump house at Open Spring. If it has been decided to go ahead with this Installation, I think it is very important that the line be thoroughly icleaned out thru weir box at settling basin and samples sub- {mitted for bacteriological analysis before the production jfrom this source is allowed to get into the City mains. (This is extremely important and I trust there will be no lslip-up on the part of our employees.