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Task 3 - Section 15 Stream Realignment <br />This task requires the furnishing of all labor and equipment necessary to excavate and <br />establish a new stream channel for an unnamed stream emptying into Del Augua Creek in the <br />extreme south center of Section 15. <br />Work Descriation <br />Approximately four hundred feet of new stream channel will be excavated through surficial <br />clay, silt, and unconsolidated sediment containing occasional coal, and other imported rock. <br />Bedrock is believed to be between five and ten feet below the surface, and consists of silt <br />stone and sandstone with a notable absence of gravel normal to stream laid deposits. <br />Bedrock may or may not be encountered during excavation. The new channel will be twenty <br />feet in width at the bottom with a high berm on the. northwest side (see Drawing #1). Excess <br />material from channel construction shall be used in construction of the berms, and/or disposed <br />of in the Pond 15-P10 removal, and regrading or embankment construction for Pond 22-P10. <br />Slight meanders will be constructed to slow the flow of water and allow development of a <br />normal stream channel (see Map #4). <br />A mine haulage road will cross the realigned channel by a riprapped low water crossing. This <br />portion of the task requires excavating the road, plus ten (10) feet on each side of the road, <br />a depth of two (2) feet below stream channel grade and replacing with two feet of riprap (see <br />Map #4). Riprap material for the road crossing must consist of durable irregular rock have a <br />minimum D - 50 of 6 inches and D-max of 9 inches. Riprap will have to be imported and must <br />be approved by Project Manager prior to hauling to the site. Channel configuration, and limits <br />will be staked by DMG personnel. The portion of the haul road below the riprapped crossing <br />shall be re-graded to eliminate a large erosion gully. The width and grade of the road shall not <br />be changed. <br />Measurement and Payment <br />There will be no measurement for payment for Task #3. Payment for Task #3 will be <br />reflected in a lump sum bid under Item 3 on the Bid Schedule. <br />Task 4 - Pond 15-P10 Removal <br />The purpose of this task is to completely remove Pond 15-P10 which was not included in the <br />mine permit as a permanent pond. <br />Work Descrir)tion <br />The east, south and west embankments of Pond 15-P10 shall be removed and incorporated <br />into the north side of the inslope. The resulting new slope shall be graded to approximate <br />original contour. Revegetation shall be according to specifications in 20.0 Revegetation, <br />attached, and will be paid for under Item 13. <br />Measurement and Payment <br />There will be no measurement for payment for Task #4. Payment for Task #4 will be <br />reflected in a lump sum bid under Item 4 on the Bid Schedule. <br />7