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ARCO COAL COMPANY <br />MT. GUNNISON NO. 1 MINE <br />EARTHWORK PACKAGE <br />ADDENDUM NO. 2 <br />January 5, 1981 <br />_ The following shall become as fully a part of the above-named Drawings, <br />Specifications and Bid Documents as if therein written and shall take full and complete <br />e precedence over anything therein contained to the contrary. <br />Each bidder shall indicate on the proposal form his acknowledgment of this <br />Addendum. <br />- Each bidder shall be responsible for reading each item of this Addendum to <br />' ascertain to what extent and in what maMer it affects the work to be performed. <br />I <br />1. Section 02200 P e 02200-12 S ecifications for Runoff Ponds and Freshwater <br />onds; add the ollowing: <br />E. Density tests performed on compacted soils to determine compliance with <br />r these specifications shall be performed at the direction and expense of the <br />Owner. Nuclear Density Tests will be acceptable for homogeneous fill areas <br />if at least one Sand Cone Density Test is performed for every ten Nuclear <br />Density Tests. The Sand Cone Density Test must be taken adjacent to the <br />preceding Nuclear Density Test. <br />Classifications and compaction curves to be used with the Nuclear Density <br />Test shall be taken and submitted prior to construction. The classificatio <br />will also include a description of soil properties, including color, es well es~ <br />the information required under part D of this section. <br />2. Section 02520, page 02520-6, Specifications for Runoff Ponds and Freshwater <br />Ponds; Add the following details included in this Addendum: • <br />02520-7 Typical Anti-Seep Collar Construction Detail for Pipe Without <br />~_ Cradle. <br />02520-8 Typical Anti-Seep Collar and Concrete Cradle Detail Pipe with <br />L_ Cradle. <br />02520-9 Longitudinal Construction Detail of•Anti-Seep Collar and Cradle. <br />L 3. All Plan Seets for•RunoPf Ponds and Freshwater Ponds Autlet Works Details; Make <br />the ollowing changes to the_Plans: ,.". <br />L Adjust location of all stem guides on stems of sluice gates as follows: The un- <br />supported length of the stem is to be equally divided. The unsupported length of <br />the stem is not to exceed 8 feet. <br />4. Freshwater Pond No. 1, Project No. MG-02-04 (FW#1), Drawing No. C-010; Change <br />the following d:mension: <br />`~ In the plan view at the top of Drawing No. C-010, Project No. MG-02-04, thc~ <br />~ dimension for the distance the Rip Rap extends south of the control tower shall be <br />~ ~ changed from 5'-0" to 15'-0". <br />