CLEARING AND GRUBBING



4.1 Scope

This Work shall consist of the removal to a depth as designated, and disposal of all trees, stumps, bushes, roots, vegetation, logs, rubbish and other objectionable materials as and when required by the Engineer. It shall also include the removal and disposal of structures that obtrude, encroach upon or otherwise obstruct the Work except when otherwise provided for on the Drawings.

4.2 Construction Requirements

4.2.1 Grubbing

In roadway cut areas all stumps and roots larger than 3 inches in diameter shall be removed to a depth of not less than 20 inches below the subgrade. In areas under roadway embankment from which unsuitable materials are to be removed or which are designated to be compacted all stumps and roots larger than 3 inch in diameter shall be removed to a depth of at least 30 inch below the finished ground surface.

4.2.2 Clearing

Such individual trees as the Engineer may designate and mark in white paint shall be left standing and uninjured. In order to minimize damage to trees that are to be left standing, trees shall be felled towards the centre of the areas being cleared if so required by the Engineer.

When necessary to prevent injury to structures or other trees or property or to minimize danger to traffic, trees shall be cut in Sections from the top downwards.

All timber obtained as a result of clearing shall be handed over to the Employer and stored at a designated location. All bush, stumps, roots, rotten wood and other refuse from the clearing and grubbing operations shall be burnt or complete removed from within the right-of-way.

When the area on which an embankment is to be placed has been cleared the Engineer may order the surface of the existing ground to be scarified so that the filling material will bind into the original ground. The cost of such Work, if so required shall be include in other items of Work.
Before the bottom layer of the embankment is made, the Contractor will grub up and remove, without extra payment, any vegetation that may in the meantime have grown on the surface previously cleared and grubbed.

4.2.3 Protection and Restoration

(i) The Contractor shall prevent damage to all pipes, conduits, wires, cables or structures above or below ground.
(ii) No land monuments, property makers, or official datum points shall be damaged or removed until the Employer / Engineer has witnessed or otherwise referenced new locations and approved their removal.
(iii) The Contractor shall so control his operations as to prevent damage to trees and shrubs, which are to be preserved.
(iv) Protection may include fences and boards lashed to trees to prevent damage from blasting or machine operations.
(v) The Contractor shall carefully cut off all branches of trees hanging within 16.0 ft. above any part of the roadway or which have been broken or injured during construction.
(vi) Where soil over the roots of trees to be preserved has become compacted it shall be restored by proper cultivation to a condition to permit adequate aeration of the soil.

4.3 Measurement and Payment

(i) Clearing and grubbing will be measured for payment only on areas so designated in writing by the Engineer or shown on the Drawings.
(ii) Clearing and grubbing carried out by the Contractor in cuts and borrow pits shall not be measured for direct payment.