Southwest - ValleyFloor_TellurideStreamRestoration_Final Report

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i function.Incorporating HRV into restoration planning acknowledges the dynamic quality of landscapes by allowing variability and disturbance at reasonable levels and permitting riverine landscapes to adapt to the physical processes of their watersheds." Data collection techniques for HRV include historic aerial photograph interpretation,ground-penetrating radar surveys, and trenching;coring, and radiocarbon dating of valley-bottom sediments.In order to utilize HRV for this project our choice was to delay the project one year to partner with a team from CSU to provide the service for free or hire a GIS contractor for$25,000 for more immediate results. In the end,we decided that the only pieces missing were the ground-penetrating radar and radio carbon dating within the area of the new stream alignment.We had confidence in our analysis of historic photos and current conditions indicating historic channel alignments and in ERC's fieldwork,so we chose to move forward without the HRV analysis.In retrospect,it is unlikely the additional analysis would have changed the constructed alignment,but the dating of soils and a more complete picture of ground water flows would have provided useful data.We now have a few years before we initiate the next river restoration project on the Valley Floor and may decided to initiate a partnership with CSU to perform a HRV for the entire property. The year long process to create and revise and re-revise the final design/build plans and make last-minute changes in the field before construction began eliminated all but the smallest unanticipated discoveries.As mentioned previously,we condensed the proposed 6-acre material storage site and had to add the task of dealing with hyperactive beaver activity. The only actual change order was unrelated to the CWCB funded tasks:As Tezak was making final field assessments,they discovered that the existing sewer line,buried in the section of railroad grade used to move excavators and haul trucks to the downstream sewer line improvement location,was degrading clay buried in tailings and other unstable materials.A last-minute decision was made to replace the short distance of pipe and reinforce the surrounding material to support the equipment adding additional improvements to a sewer line built in the 1960's. Additional materials (not attached) include: APPENDIX • Actual Expense Budget • Appendix A- Final Pre-Construction Site Map • Appendix B - Final Design/Build Plan Set • Appendix C- Historic range of variability in geomorphic processes as a context for restoration- Rocky Mountain National Park, Colorado, USA • Appendix D - Movie