THE OAMARU DOCK.

Westport Times, Volume IV, Issue 696, 11 August 1870, Page 3

THE OAMARU DOCK.

[From the Otago " Daily Times.") As soon as the plans and specificaons are passed by the Government, nders will be called for in three sec9ns. The first will consist of a wall XX) feet in length, to be built of mcrete, from the low water mark in S.E. direction, commencing near the ewery : lagoon, and will form the def protection to the dock entrance. be section will include all the works innected with the dock entrance and isin ; and third, a sea wall will exnd from the site of the old jetty in N.W. direction towards the other all, part of the jetty being used for aming for the concrete, say to a ngth of 227 feet. The remainder of e wall, for a distance of 573 feet, mak<t 800 in all, will be built of somebat larger dimensions. The object this second wall is to divert a part the force of the sea from the enance to the dock. There will, hower, be a distance of fifteen hundred et between the ends of the two walls. ne advantage of this plan is, that if e last mentioned and least expensive ork is gone on with it will give imediate shelter, and even without the ick will be of great value. There ill be 15 feet of water at low water side the outer part of it, and vessels of msiderable size could therefore take Ivantage of it. There seems no iubt whatever that this wall will and, as it will, like the other wall, be instructed in blocks of 250 to 300 ids. by means of concrete, filled in to on caissons made of one-eighth inch on, which will remain when filled, id hold the mass together until loroughly hardened, when it does it matter whether the iron rusts ray or not. Each block will be mgued into the next for a distance [two feet, and the arrangements for inducting the work, piece by piece, •e so simple, that there seems no ason to anticipate any difficulty, so ras the walls are concerned. Mr ['Gregor deserves great credit for ie completeness of his plans, and it to be hoped that they will be suc>ssfully carried out. The concrete ill be similar to that used in the Port lhalmers graving dock, viz., one part if cement and one part of sand to five arts of stones, a portion of which lill be broken into angular form, and art round shingle. The depth of jater at the dock entrance is to be 8 pet at low water.