75 



Construction JJ'ork. 



Kauai.- — The new continuous record stream measurement sta- 

 tion on the Waialae branch of the W'aimea river was completed 

 and the record started on December 31, 1915. 



Oahii. — The cable foot-bridge on the Kalihi stream used for 

 flood measurements was rebuilt. 



Operation and Maintenance IVork. 



Kauai. — The trails leading to the high level stream measure- 

 ment stations on the Waioli, Lumahai, and Wainiha streams 

 were cleared and are now in good condition. Twenty-two stream 

 and ditch measurements were made and 15 rain gauges were 

 visited. A reconnaissance was made of the Kalama stream and 

 two measurements were made. This stream may be diverted 

 to serve some of the Kapaa homesteads. 



Oahu. — The discharge from the north or Waiahole portal of 

 the Waiahole main tunnel was measured on December 21 and 

 found to be about 8.0 million gallons per day. The discharge 

 from the A\'aiawa portal at the same time was about 4.0 million 

 gallons per day. Later reports indicate a still further decrease 

 in the discharge from both portals. 



A reconnaissance of the ditches diverting water from the Nuu- 

 anu stream was made. These data will be included in a report 

 relative to surface water flow and utilization in the immediate 

 vicinity of Honolulu, now being prepared. 



All stream, ditch and rainfall stations, excepting those in Ka- 

 hanaiki and Kailua valleys, were visited. Twenty-three measure- 

 ments were made at regular stream and ditch stations and seven 

 rniscellaneous measurements were made. 



Maui. — R. D. Klise, assistant engineer, spent the greater part 

 of the month on East Maui, repairing and improving stream 

 measurement stations, clearing trails, etc. 



C. T. Bailey, assistant engineer, and G. K. Larrison, superin- 

 tendent, spent several days on reconnaissance to select locations 

 for ditch measurement stations to be used for the determination 

 of the amounts of water being diverted under the various Ter- 

 ritorial water licenses. Four stream and ditch measurements 

 were made. 



Hawaii. — H. A. R. Austin, junior engineer, spent the last week 

 of the month on Hawaii collecting data and making measure- 

 ments relative to waters owned by the Territory of Hawaii in 

 the Kohala and Hamakua districts. This information will be 

 used, in part, by the Territorial Attorney General's department 

 in the near future. 



Rainfall Records. 



Annual rainfall records are being collected as rapidly as pos- 

 sible, and should be available for the next monthly report. 



