Laserfiche WebLink
Ta sk 5 <br />Portal Repair and Rock Apron <br />M� The mine portal area backfill extends up against a sandstone outcrop. Water upgradient of the <br />portal backfill is flowing into an existing channel and creating an opening between the sandstone <br />and fill material. The area will need to be excavated 8 feet deep by 10 feet long by 3 feet wide to <br />determine the extent of the portal opening. Following excavation, the hole will be filled with 18" <br />to 24" diameter rock, located on site, to a depth of 5 feet and covered and compacted with the <br />excavated material to original grade surface. The rock will be collected by the CONTRACTOR <br />X5 at a location specified by the PROJECT MANAGER. <br />y H A rock channel apron will need to be installed over the repaired hole to deflect water into the <br />existing channel and rock check dams. The rock apron will be constructed using on -site rock <br />material 18" to 24" diameter in size. The rock apron shall be approximately 5 feet wide, 10 feet <br />long and 3 feet deep and keyed into the surrounding material to a depth of 2 feet on both sides <br />of the apron. <br />Measurement and Payment <br />There will be no measurement for payment of Task 5, Portal Repair and Rock Apron <br />construction. Payment for this Task will be reflected in a lump sum bid under Item 5 on the Bid <br />Schedule. This lump sum bid will cover all costs for excavating, hauling, placing and <br />compacting the rock material as described in these specifications. <br />Task 6 <br />Revegetation: <br />All areas disturbed during reclamation construction work and any other areas specified by <br />Project Manager will be revegetated. Contractor will supply fertilizer, mulch, labor and <br />equipment necessary for completion of this Task. Owner will supply seed. <br />The following requirements will be adhered to: <br />Fertilizer: Biosol Plus (7 -3 -3), or approved equivalent, will be added to all ground surfaces <br />disturbed during reclamation construction. This material will be applied in advance of seeding at <br />the rate of eight hundred (800) pounds per acre. It is estimated that 800 pounds of Biosol Plus or <br />approved equivalent will be required. <br />Seedbed Preparation: Seedbed preparation will be accomplished as a result of Surface <br />Roughening operations. Surface roughening will be accomplished in the following manner: <br />- Two (2) tons of certified weed free mulch per acre will be applied to the ground surface. <br />Mulch will be provided by Contractor and must be certified as noxious weed free or noxious <br />weed seed free by an authorized State or County Officer. Documentation of certification must <br />be provided to Project Manager prior to application of mulch. <br />The mulch will be evenly distributed over the ground surface. Surface roughening will occur <br />simultaneously with distribution of the weed free mulch in order to prevent loss of the mulch due <br />to wind. <br />