| http://www.w3.org/ns/prov#value | - 'Sheet piling for cut-offs shall be of sound spruce, pine, or other suitable material, four inches and five inches in thickness, as shown on plans, dressed to a uniform thickness, grooved and fitted with white-pine tongues, driven close, and to such depth as may be found necessary to make good work, and closely fitted to square piles at intersections.
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