WHANGAMARINO SWAMP, AUCKLAND PROVINCIAL DISTRICT

Appendix to the Journals of the House of Representatives, 1914 Session I, C-09

C—9

1914. NEW ZEAJ. A N D

WHANGAMARINO SWAMP, AUCKLAND PROVINCIAL DISTRICT

(STATEMENT IN CONNECTION WITH THE PROPOSED DRAINAGE OK THE).

Laid on the Table of the House of Representatives by Leave.

Statement re Proposed Drainage of Whangamarino" Swamp. The area of swamp land is approximately 11/300 acres. The proposal to drain this swamp was reported upon by Mr. William C. Breakell, C.E., under date 2nd March, 1909, who stated, " I am of opinion that it is impracticable to drain or otherwise reclaim the Whangamarino and other Government lands adjoining without commencing at the*initial point- the clearing of the bed of the Waikato River." The Whangamarino and Maramarua Rivers ;.con#ol the position, and when the summer level of the Waikato River at Mercer rises 2 ft. then these two .rivers overflow their banks and the swamp lands are awash for a very considerable area. There is less than 1 ft. of fall in the Whangamarino River from its junction with the Waikato River to the foothills, and the fall of the Maramarua. River is also very small. Accordingly, with a rise, in the Waikato River .there is a corresponding rise in the Maramarua and Whangamarino Rivers, and a substantial lowering of the Waikato River is necessary to ensure gravity drainage of the swamp lands. It would "be possible to drain the swamp lands by banking the Maramarua and Whangamarino Rivers, and erecting banks along railway-line, and'thereafter relying upon pumping to keep the area free of water, but such a scheme would be .very costly. It is also manifest that to.lower the Waikato River will also be a huge work, as the fall therein is small. It will probably be not so difficult to reclaim swamp areas close to foothills. An, engineeringsurvey is now in hand in connection.:.with the swamp under review, but, as this survey is being done together with the Waikato River survey, it-wUl;necessarily be some months ere it is complete, especially as the officer in local charge of same has lately'been under an operation for appendicitis. ;The swamp survey will disclose to what extent both Crown lands and freehold lands can be adequately drained; Necessarily, any scheme for drainage of this swamp must be on a mutual basis, and'the owners of freehold lands will be required to pay proportionately to the benefits received frorn-sjich drainage. It would be useless at the present time to subsidize any local body-formed for the:'.purpose of prosecuting drainage operations, seeing that so many factors ente-r into the consideratipii'of such a scheme. A plan will in due course be drawn up showing all the owners oftland-a who will be affected, so that a fair allocation of cost against such lands may be arriyedat. The Crown is anxious to make its own lands available for settlement, as it has done in the case of-Hauraki PlaihjS, but cannot be expected to undertake any scheme likely to benefit privately owned lands witSo'ut such lands finding a proportion of the cost. ; „..,.., The Waikato River presents the most serious obstacle to drainage operations on Whangamarino Swamp, and most exhaustive engineering data is now being obtained thereof. An Inland Waterways Royal Commission has been set up quite lately, and the Commission will, towards the end of the year,, commence its deliberations. Included in its order, of reference is the improvement of the Waikato River, and also the drainage of Whangamarino Swamp, so that it must be very apparent that the Government is very sincere in its desire to enable the settlement of its swamp lands. To enable the Royal Commission to fully consider the matter the various engineering surveys were put in hand some eighteen months ago, and are still.being carried on under supervision of the Land Drainage, Engineer.

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Attached hereto is a plan of the Whangamarino Swamp, which shows the swamp lands held by the Crown. From the foregoing statement the only reasonable conclusion to be arrived at is that the matter of drainage must be held in abeyance for some time yet, so that a comprehensive scheme may be evolved. J. B. Thompson, 20th July, 1914. Land Drainage Engineer. N.B. —From data already gathered it is apparent that it will be easier to obtain improvement from Waikato Heads to Tuakau Landing, in the bed of Waikato River, than from Tuakau Landing to Mercer and thence up-stream. ,1. B. T.

Approximate Cost o) Paper.- —Preparation, not £iven ; printing (650 copies), £2 IDs.

Authority : Jqhn Mackay, Government Printer, Wellington, —l9l4.

Price Hd.l

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