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Required Easements and ROW <br /> Typical easements for the project include a 60-foot-wide permanent easement and 20-foot- <br /> wide temporary construction easement through private,agricultural properties for the 60- <br /> inch pipeline;a 75-foot minimum working area within the existing E-470 MUE;and an 80- <br /> foot permanent easement for trenchless pipeline crossings as required by launching and <br /> receiving pit excavation. The minimum construction width will be 20 feet to allow <br /> construction access or material stockpile.Temporary easements are planned to supplement <br /> existing ROW and/or permanent easements to provide room to maneuver equipment or <br /> materials.Temporary easements will be used for materials storage or equipment at <br /> launching and receiving pits for microtunneling and pipe jacking operations. <br /> Construction Considerations <br /> The following basic sequence will be used to construct each pipeline: <br /> 1. Perform final pre-construction environmental surveys and perform any required <br /> mitigation prior to starting construction, <br /> 2. Clear and grade pipeline alignments, <br /> 3. Excavate trench for pipe installation, <br /> 4. Haul pipe to construction sites, <br /> 5. Place pipe along trenches, <br /> 6. Place pipe in trenches and connect pipe, <br /> 7.Backfill trenches and grade surface,and <br /> 8. Clean up and restore areas disturbed by construction. <br /> Aurora Water and its team of professionals have completed thorough environmental <br /> assessments for the segment. In addition,immediately prior to starting construction,a final <br /> pre-construction environmental survey will be performed by the City's environmental <br /> consultant,to re-confirm any sensitive areas and identify appropriate protection or <br /> preservation measures to be implemented prior to or at the start of construction,possibly <br /> including revisions to the construction sequence or schedule,addition of fencing,or where <br /> permitted,relocation of species. Clearing will be performed in accordance with the permits <br /> and conditions in easement agreements with public and private landowners.This will <br /> include proper disposal of debris,stockpiling topsoil for use in site re-vegetation,and <br /> appropriate environmental and drainage controls.Open-trench construction will comply <br /> with OSHA safety standards and will include minimum cover of 5 to 8 feet(8 feet where <br /> necessary to prevent service disruptions to existing utilities).Groundwater encountered in <br /> trenches will be pumped into temporary land application systems or routed to portable <br /> treatment facilities.Turbid water will be treated before discharge into streams or storm <br /> drains with settling facilities. Pipe will be installed in lengths 40 to 48 feet(20 to 25 feet at <br /> pipe-jacking locations). Permits will be obtained prior to any discharges,to comply with all <br /> local,state, and federal regulations.Topsoil and native earth stockpiled from the trench <br /> excavation will be retained on-site for surface restoration. <br /> Utility conflicts are not expected because the Segment 1 route avoids residential and <br /> commercial areas,through the selection of the alignment within the E-470 MUE.This <br /> alignment will avoid service laterals such as gas,electrical,telephone,water and sewer <br /> through the City of Brighton and other rural residential areas.Prior to final design, <br /> 16 <br />