26 



Special LiTCstigations. 



Kipapa Ditch Losses, Oahu — On October 23, the manager of 

 the Oahu Sugar Co., Ltd., asked if this office could make a .few 

 measurements on the Kipapa flood water ditch of that plantation, 

 to determine seepage losses. This investigation was undertaken 

 on October 26, and it was found necessary to extend the work 

 over to include the 27th, in order that reliable data might be 

 obtained. The data obtained were very valuable and resulted 

 in the resolution, by the directors of this plantation, to expend 

 about $40,000.00 in lining this ditch with cement or concrete. 

 A copy of the report, with blue prints, furnished the Oahu- Sugar 

 Co., Ltd., is appended hereto. 



Dry Weather Flozv Betzveeii Waialae and Makapuu Point, 

 Oahu — An investigation was made to determine the advisability 

 of establishing weir stations in the upper valleys between Waialae 

 and Alakapuu Point, to measure the duration and quantities of 

 flowing water in these valleys in dry weather. Inquiry of land 

 holders and inhabitants of these valleys leads to the conclusion 

 that there is no surface flow, except for periods of a few weeks 

 after heavy rains, and that the expenditure of time and funds 

 necessary for an intensive investigation of this kind is not justi- 

 fied. The investigation of the flow of springs near sea level in 

 these valleys will be undertaken, as soon as weather conditions 

 permit. 



East Maui Ditch Flow — At the request of His Excellency the 

 Governor and the Land Commissioner of Hawaii, an investiga- 

 tion to determine the quantities of water diverted from the areas 

 under each of the five Territorial water and land leases on East 

 Maui was started. In order that ditch improvement work costing 

 •about $300,000.00 may be started in the near future, an attempt 

 is being made by the lessees of Leases Nos. 475B and 658 — 

 which terminate in 1916 and 1919 respectively — to have these 

 leases renewed as soon as possible. The flow of streams and 

 ditches in this region has been under investigation by this divi- 

 sion and the IJ. S. Geological Survey since 1910. The East Maui 

 Irrigation Company has furnished all data in its possession and 

 from all data at hand an estimate of the mean flow, in million- 

 gallons per day, diverted from the lands under each lease has 

 been worked out. This report was completed on November 10, 

 and copies thereof will be stibmitted with the regular November 

 report. 



Special Work For the Governor. 



This division began the preparation of colored maps showing 

 the Territorial lands, homesteads. Federal reservations. Terri- 

 torial and private forest reserves as well as tunnels, ditches, etc., 

 of the islands of Kauai and Maui. Tables of ditch and stream 

 flow from Territorial lands are also being prepared. These data 



