Channel Excavation Art. 203.06 Additional work required to reshape the shoulders to the new grade line for pavement resurfacing will be paid for according to Article 109.04. Temporary drainage facilities required during the course of construction will be paid for according to Article 109.04 unless otherwise provided for in the contract. SECTION 203. CHANNEL EXCAVATION
203.01 Description. Channel excavation shall consist of the removal and
satisfactory disposal of all materials encountered in the construction of new stream channels and in widening, deepening, or straightening existing stream channels. CONSTRUCTION REQUIREMENTS
203.02 Classification. Excavation in channel will be classified as channel
excavation and rock excavation in channel, according to Article 202.04.
203.03 Clearing, Tree Removal, and Protection of Existing Plant Material.
Prior to starting excavation operations, all clearing, tree removal, and protection of existing plant material shall be performed according to Section 201.
203.04 Excavation. The Contractor shall notify the Engineer, at least three
days in advance of starting excavation operations, to permit the completion of accurate measurements for volume determinations. Any material excavated before such measurements have been taken will not be paid for. Channels shall be excavated according to the lines, grades, and cross sections shown on the plans; there shall be no deviation from the dimensions shown without the written consent of the Engineer. Excavated materials shall be disposed of as shown on the plans or as directed by the Engineer. Where piles are to be driven as a part of the permanent improvement, any channel excavation at the location of such piles shall be completed to the final elevation before the piles are driven.
203.05 Method of Measurement. Channel excavation and rock excavation in
channel will be measured for payment according to Article 202.07.
203.06 Basis of Payment. Channel excavation will be paid for at the contract
unit prices per cubic yard (cubic meter) for CHANNEL EXCAVATION and ROCK EXCAVATION IN CHANNEL. When the contract does not contain a unit price for rock excavation in channel, and such excavation is required, it will be paid for according to Article 109.04. Art. 204.01 Borrow and Furnished Excavation SECTION 204. BORROW AND FURNISHED EXCAVATION
204.01 Description. Borrow excavation and furnished excavation shall
consist of excavating suitable and/or restricted-use materials obtained from locations approved by the Engineer and transporting the materials to various locations throughout the limits of the contract.
204.02 Furnished Excavation and Borrow Pits. The Contractor shall
furnish and pay for all borrow sites or other sources of excavation and obtain from the property owners the necessary agreements for the removal of the material. Neither borrow nor furnished excavation shall be placed in the embankment until the site location, excavation plan, and material have been approved by the Engineer in writing. The material used shall be suitable or restricted-use according to
Article 1009 — 04.
At the Contractor’s option, commercial borrow sites may be used. When commercial borrow sites are used, the following conditions will not be required. Under no condition shall borrow sites detract from the appearance of the natural topographic features nor increase the potential hazard to a vehicle that has inadvertently left the roadway. In selecting sites for borrow acquisition, preference shall be given to knobs, hills and rises to reduce the extent of pit development. No portion of any borrow pit shall be located within 50 ft (15 m) or 10 ft (3 m) plus 1 1/2 times the depth of the excavation, whichever is the greater, from any highway right-of-way, except when borrow is obtained above pavement elevation. In order to ensure an aesthetically acceptable borrow site, the steepest slopes used in excavating borrow shall be 1:4 (V:H). Borrow pits shall not change the general pattern of existing drainage and shall be well drained unless suitable for development as ponds or lakes. Pertinent drainage information shall be shown on the excavation plan or topographic map submitted by the Contractor. Where the Contractor proposes a borrow site, any portion of which is located within 150 ft (45 m) of any highway right-of-way, the Contractor’s request for approval shall be accompanied by a topographic map showing the original and the proposed final conditions of the entire borrow site. The topographic map shall be drawn to a minimum horizontal scale of 1:500, and 2 ft (600 mm) contour intervals shall be indicated. When a borrow pit is to be developed as a pond or lake, the Contractor shall submit to the Engineer a written statement from the owner that such a development is planned. Slopes of 1:4 (V:H) shall be provided along the periphery of the shoreline. Slopes of 1:2 (V:H) will be permitted below a point where the proposed water depth will be 8 ft (2.5 m) or greater. In cases where a dam is necessary to impound water within a borrow pit to be used as a pond, slopes of 1:3 (V:H) will be permitted on the water face of the dam. Seeding will not be required below the proposed water elevation. Borrow sites shall be seeded according to Section 250. The class of seeding and the application rate of fertilizer nutrients and/or agricultural ground limestone will
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