33

D.—l

5—D. 1

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

Main Canals River Discharge Average Rainfall Rainfall Area Length of j Length of Expenditure Estimate Scheme. Source of Supply. Discharge (Maximum), from loofi commanded Main I Distribu- to 31st to Eemarks. (Minimum). as per Records available. (Gross). Canal, j taries. March, 1927. complete. Design. 1 | I Cusecs. Cusecs. Inches. Inches. Acres. Miles. Miles. £ £ Maniototo (Upper Taieri) Taieri River and storage 25 500 17-67 19-47 100,000 60 .. 257 .. Modified scheme for complete irrigation dam (Waipiata) of 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 21-52 23'28 15,000 10 30 3,074 Various This scheme is a costly development, burn (Roaring Meg) (gravity), Kawarau 3,000 (Luggate) and alternative scheme of combined River (pumping) power development and irrigation are being investigated. Upper Manuherikia .. Manuherikia and Dunstan 77 500 20'07 27-74 96,000 130 .. 5,256 866,360 Surveys and investigations in connecRivers.and storage dam (Clyde, Ophir, and tion with dam and storage have been in Manuherikia River Blackstone Hill) continued. at Falls Hawea Flats (first alter- Timaru Creek (gravity) 20 30 26-42 20-05 4,000 11 20 49 41,470 To irrigate lower flat only. native) (Hawea Flat) (8 months only) Hawea Flats (later alter- Hawea River (pumping) .. .. 26-42 20 05 17,600 .. .. .. 71,720 Latest tentative proposal. Electric native) (Hawea Flat) (8 months power not necessary, but water to be only) 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 .. .. 15-02 17 65 100 .. .. 16 1,165 May yet be amalgamated with Last Creek, and storage dam (Alexandra) Chance scheme or possible scheme from Conroy's Gully. Bendigo Flat .. .. Lindis River and storage 40 30 19-32 21-64 3,000 7 .. .. .. Survey will be commenced shortly. dam (Tarras)