112 



of one of the employes of this division will be devoted to this work 

 at the expense of the water users. It is probable that this special 

 work will be started in April. 



SPECIAL INVESTIGATION. 



An investigation of the water being diverted by private com- 

 panies from government lands in Kohala, Hawaii, was completed. 

 A copy of the report of this investigation is appended hereto. 



CONSTRUCTION WORK. 



^Materials and equipment for the two new proposed continuous 

 record stations on the government-owned streams of Olowalu 

 and.Ukumehame were assembled, and excavation work w^as prac- 

 tically completed on the Olow^alu stream wdien the storm of the 

 18th proved the station site undesirable. Under orders from this 

 office this work was discontinued until an investigation could be 

 made in February by the Superintendent. The balance of the 

 month was devoted to completing repair work to existing stations 

 on East ]\Iaui. 



OPERATION AND MAINTENANCE WORK. 



Kauai. On account of bad weather conditions, no construc- 

 tion or repair work was undertaken. The greater part of the 

 month w^as used to assemble, check and prepare for publication 

 data for the biennial report. 



Thirty-three stream and ditch-measurement stations and 15 

 rain-measurement stations were visited, and 33 stream and ditch 

 measurements were made. 



Oahu. Only routine work was done. Twenty-nine stream 

 and ditch-measurement and four rain-nieasurement stations 

 were visited. Eighteen stream and ditch measurements were 

 made at regular stations, and 12 miscellaneous measurements 

 were made. 



Kauai. A large amount of repair and maintenance work was 

 done. Structures were painted, trails cleared, deadmen and other 

 foot bridge and cable anchorages uncovered and examined. 

 Fifty-seven visits were made to regular stream and ditch-measure- 

 ment stations, and two visits were made to the upper lao rain 

 gage. Twelve stream measurements were made. 



Hazvaii. In addition to the special investigation made by ]\Ir. 

 Austin, nine stream measurements were made at two stream- 

 measurement stations in the Waipio \ alley, of which daily gage 

 height records have been furnished by cooperating parties for 

 several years. 



ANNUAL RAINFALL RECORDS. 



These are being sent in so slowly by cooperating parties that 

 the annual results cannot be estimated at this time. 



Very respectfully, 



G. K. Larrison, 

 Superintendent of Hydrography. 



