35

D.—l

TABLE No. 7-continued. IRRIGATION AND WATER-SUPPLY- continued. Schedule of Schemes under Investigation.

Main Canals I River Discharge Average Rainfall , ,, m[l - i. Area Length ol Length of Expenditure Scheme. Source of Supply. | Discharge (Maximum), from 1027 commanded Main Distribu- to 31st Remarks. I (Minimum). as per Records available. (Gross). Canal. taries. ; March, 1928. Design. | Casecs. Cusecs. Inches. Inches. Acres. Miles. Miles. £ Maniototo (Upper Taieri) Taieri River and storage 25 500 17-56 16-45 100,000 60 .. 257 Modified scheme for complete irrigation of dam (Waipiata) 5,000 acres is possible without storage, or for reasonable partial irrigation of 15,000 acres. Cromwell Flat and Low Roaring Meg Stream 29 40 21-19 17*01 15,000 10 30 3,174 Development would be costly. burn (Roaring Meg) (gravity), Kawarau 3,000 (Luggate) River (pumping) Upper Manuherikia .. Manuherikia and Dunstan 77 500 20-30 22-66 96,000 130 .. 5,259 Further investigations into water requirements Rivers, and storage dam (Clyde, Ophir, and and areas available, and revised estimates have in Manuherikia River Blackstone Hill) been made. at Falls Hawea Flats (first alter- Timaru Creek (gravity) 20 30 25-85 23-92 4,000 11 20 49 To irrigate lower flat only. native) (Hawea Flat) Hawea Flats (later alter- Hawea River (pumping) .. 25-85 23-92 17,600 .. .. .. Latest tentative proposal. Electric power not native) (Hawea Flat) necessary, but water to be pumped by direct application of power generated by low-pressure turbines at outlet of Lake Hawea. This appears preferable to alternative No. 1, and appears to be a promising scheme. Further closer survey and estimates are necessary. Chapman's Gully .. Butcher's Creek, Conroy's .. .. 14-65 11-23 100 .... 16 Creek, and storage dam (Alexandra) Bendigo Flat .. .. Lindis River and storage 35 30 18-99 17-67 3,000 7 .. .. The greater portion of this area is now served. dam (Tarras) * Teviot River Extension i Teviot River and Lake 40 80 14-43 16-81 2,300 .. .. 207 To irrigate a limited area in the vicinity of Onslow dam (Roxburgh East) Ettrick, on west side of Clutha River. Miller's Flat .. .. Minzionburn .. .. 6 .. .. .. 2,000 .. .. 192 Survey and proposals completed. Luggate Burn .. .. Luggate Burn .. 6 12 21-19 17-01 1,200 .. .. 273 To supply water to part of Mount Pisa settle(after ex- (Luggate) ment lands. isting rights) Scandinavian .. .. Tributaries of Manuheri- .. 20 30-57 39-37 4,000 .. .. .. For lands about St. Bathan's. Include- £12,000 kia River (St. Bathan's) towards cost of Falls dam. Upper Manuherikia scheme. Soil Survey (Central Otago). .. .. .. .. .. .. .. .. 2,534 This soil [survey in the irrigation districts is i now complete, and plans are being prepared. 250,000 acres were surveyed this year. Investigation of proposed I .. .. .. .. .. .. .. 120 Includes the reading of river and rain gauges. schemes ; 1 * Put under Teviot River scheme with which it will be ultimately amalgamated.