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REPORT FOR MAY. 



Honolulu, Hawaii, June 9, 1916. 



Board of Commissioners of Agriculture and Forestry, Honolulu, 

 Hawaii. 



Gentlemen : — The following report of operations of the Divi- 

 sion of Hydrography during May, 1916, is submitted : 



WEATHER CONDITIONS. 



Rainfall was plentiful generally over all of the islands during 

 the month. Heavy floods occurred on East Maui and parts of 

 Hawaii during the early part of the month, but generally the 

 rain fell in light but abundant showers. 



The rainfall measurement station on Mt. Waialeale, elevation 

 5075 feet, on Kauai, which was reestablished on May 21, 1915, 

 was visited on May 21st, and the complete record for the year 

 showed a total of 561 inches of rainfall. 



BIENNIAL REPORT. 



The biennial report, containing all detailed data collected dur- 

 ing the period ending June 30, 1915, was sent to the Washington, 

 D. C, office of the U. S. Geological Survey to be printed. It is 

 estimated that about one year will elapse before this printed 

 report is distributed. In the meantime copies of data for any 

 particular locality may be had free of charge by applying to this 

 office for the same. 



HILLEBRAND GLEN RUN-OFF. 



The installation of a weir and continuous-record measurement 

 station on the Maole Stream in Hillebrand Glen was completed 

 and discharge records are now available. Two U. S. Weather 

 Bureau rain gages were established in the valley, above the sta- 

 tion, and daily and weekly records are being obtained therefrom. 



OPERATION AND MAINTENANCE. 



Kauai. The clearing and repair work in the upper Hanalei 

 and Kalihiwai trails were completed. All mountain trails on 

 Kauai, with the exception of the upper Lumahai Valley trail, are 

 now in good condition. The stream beds and cross-sections at 

 the upper Hanalei and Kalihiwai stations were also improved. 



Twenty-nine stream and ditch-measurement stations and thir- 

 teen measurement stations were visited. Thirty-nine stream and 

 ditch measurements were made. 



