342 



River on Kauai is progressing favorably. It is estimated that 

 these stations will be completed by October 31, 1915. 



A reconnaissance of the upper valleys of the Honokawai, 

 Olowalu and Ukumehame on Maui was made, and locations 

 selected for the new continuous record stream measurement sta- 

 tions to be established on the Olowalu and Ukumehame streams. 



Routine Maintenance and Operation JVork. 



Kauai. — W. V. Hardy, accompanied by R. C. Rice of the Ho- 

 nolulu office, visited 32 stream and ditch measurement stations 

 and made 25 measurements at regular stations and two miscel- 

 laneous measurements. One laborer was employed during the 

 entire month improving trails. 



Oahu. — Twenty-seven stream and ditch, and four rainfall 

 measurement stations were visited. Sixteen stream and ditch 

 measurements were made. The Waiahole Tunnel outflow was 

 measured, and was found to be decreasing rapidly at both portals. 

 The flow from the north portal on September 6 was 17.7 million 

 gallons daily and on September 30 about 16.7 million gallons 

 daily. On October 2, the flow from the south portal was 9.6 

 million gallons daily. The total flow from both portals on Sep- 

 tember 30 was about 26 million gallons daily. 



Maui. — Only routine work was done. Twenty-nine stream 

 and ditch, and three rainfall measurement stations were visited. 

 Eight stream measurements were made. 



Molokai and Hawaii. — Only rainfall measurements were made 

 by cooperative observers. 



October Plans. 



Kauai. — New measurement stations on Waimea River will be 

 completed. Four stream and ditch measurement stations on the 

 upper Hanapepe River (privately-owned) will be abandoned. 

 Trail clearing will be continued. 



Oahu. — A large amount of maintenance work will be done, 

 such as repairing weirs, foot bridges, etc. New concrete con- 

 trols will be completed on the Koloa, Wailele, Kahawainui, East 

 and Middle Malaekahana near Eaie and Kahuku. An investiga- 

 tion of water resources between Diamond Head and Makapuu 

 Point for the military authorities will be started. 



Maui. — Only routine maintenance and operation work will be 

 flonc. 



Very resj^cct fully, 



G. K. Earrison, 

 Su])crintcndcnt of Hydrography. 



