Cocopah Indian Tribe Colorado River Restoration Project Final Report AWPF #08-156WPF Task #8 Submitted to: Arizona Water Protection Fund 3550 N Central Ave Phoenix, AZ 85012 February 2011 Prepared By: AWPF Colorado River Restoration Project Final Report (AWPF #08-156WPF) Table of Contents 1 Introduction .......................................................................................................................1 2 Project Background ...........................................................................................................1 3 Contracting ........................................................................................................................2 3.1 Amendments .................................................................................................................2 3.2 Subcontracting ..............................................................................................................2 4 Overall Project Coordination (Task #3) ...........................................................................2 4.1 Deliverables ..................................................................................................................3 5 Site Description ..................................................................................................................3 5.1 Location ........................................................................................................................3 5.2 Climate .........................................................................................................................4 5.3 Vegetation Communities ...............................................................................................6 6 Groundwater Sampling (Task #5) ....................................................................................6 6.1 Groundwater Sampling Methods ...................................................................................6 6.1.1 Well Installation.....................................................................................................7 6.1.2 Well Monitoring ....................................................................................................7 6.1.3 Data Analysis .........................................................................................................7 6.2 Groundwater Sampling Results .....................................................................................7 7 Soil Sampling (Task #5) ................................................................................................... 10 7.1 Soil Sampling Methods ............................................................................................... 10 7.1.1 Soil Sampling ...................................................................................................... 10 7.1.2 Soil Analyses ....................................................................................................... 10 7.1.3 Data Analysis ....................................................................................................... 10 7.2 Soil Sampling Results ................................................................................................. 10 7.2.1 Chemistry ............................................................................................................ 11 7.2.2 Texture ................................................................................................................ 12 7.2.3 Fertility ................................................................................................................ 12 8 TWG Groundwater and Soil Sampling (Task #5) .......................................................... 14 8.1 Sampling Methods and Results ................................................................................... 14 9 Permits, Authorizations, Clearances, and Agreements (Task #1) ................................. 16 9.1 Land Owner Clearance ................................................................................................ 16 9.2 Water rights ................................................................................................................ 16 9.3 The Endangered Species Act of 1973 (ESA) ............................................................... 16 9.4 The National Environmental Policy Act of 1969 (NEPA) ............................................ 16 9.5 The Federal Insecticide, Fungicide, and Rodenticide Act of 1972 (FIFRA) ................. 17 9.6 The National Historic Preservation Act of 1966 (NHPA) ............................................ 17 9.7 Clean Water Act of 1977 (CWA) & Water Quality Act of 1987 (WQA) & Rivers and Harbors Act of 1899 (RHA) .................................................................................................. 17 9.8 Executive Orders ......................................................................................................... 17 10 Revegetation and Monitoring Plans (Task #2) ............................................................... 17 10.1 Revegetation Plan .................................................................................................... 17 10.2 Post-Revegetation Monitoring Plan ......................................................................... 18 11 Site Clearing (Task #4) .................................................................................................... 18 11.1 Site Clearing Methods ............................................................................................. 18 11.1.1 Small Re-sprout Control ...................................................................................... 18 11.1.2 Large Tree Control ............................................................................................... 19 Habitat Management, Inc. i February 2011 AWPF Colorado River Restoration Project Final Report (AWPF #08-156WPF) 11.1.3 Maintenance ........................................................................................................ 19 11.2 Site Clearing Success............................................................................................... 19 12 Native Revegetation (Task #6) ........................................................................................ 19 12.1 Revegetation Methods ............................................................................................. 19 12.1.1 Pole Planting ........................................................................................................ 22 12.1.2 Container Transplants .......................................................................................... 24 12.1.3 Fertilizer .............................................................................................................. 24 12.1.3.1 Quantities ..................................................................................................... 25 12.1.3.2 Application ................................................................................................... 25 12.1.3.3 Quality Control ............................................................................................. 26 12.1.4 Seeding ................................................................................................................ 27 12.1.4.1 Seed Mixes ................................................................................................... 28 12.1.4.2 Application ................................................................................................... 30 12.1.4.3 Quality Control ............................................................................................. 31 12.1.5 Harrowing ............................................................................................................ 31 12.2 Follow-up Salt Cedar Control .................................................................................. 31 13 Post-Revegetation Monitoring (Task #7) ........................................................................ 32 13.1 Vegetation Sampling Methods ................................................................................. 32 13.1.1 Monitoring Transects ........................................................................................... 32 13.1.2 Vegetation Cover ................................................................................................. 34 13.1.3 Woody Density .................................................................................................... 34 13.1.4 Transplanting Success .......................................................................................... 34 13.1.5 Photographs ......................................................................................................... 36 13.1.6 Data Analysis ....................................................................................................... 36 13.2 Results..................................................................................................................... 36 13.2.1 Vegetation Cover ................................................................................................. 37 13.2.2 Species Diversity ................................................................................................. 41 13.2.3 Woody Density .................................................................................................... 43 13.2.4 Transplant Survival .............................................................................................. 43 13.2.4.1 Pole Transplants ..........................................................................................