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Little Chico Creek Watershed Existing Conditions Report Vegetation, Fish & Wildlife, Water Quality, Land Use

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Little Chico Creek Watershed Existing Conditions Report Vegetation, Fish & Wildlife, Water Quality, Land Use Little Chico Creek Watershed Existing Conditions Report Vegetation, Fish & Wildlife, Water Quality, Land Use Prepared by Faculty, Staff, and Students California State University, Chico December 2002 EXECUTIVE SUMMARY This document represents a partial Existing Conditions Report (ECR) for the portion of Little Chico Creek watershed that is located in Butte County. The ECR contains a landscape overview of the watershed, information on the history of the Little Chico Creek Watershed Group, stream and fish surveys, water quality, land use, and a summary of significant findings. Activities to engage stakeholders in watershed management efforts are summarized. This project was funded by Proposition 204, The Safe, Clean, Reliable Water Supply Act. Proposition 204 was a State bond measure that the voters approved in 1999. This report is only a partial ECR because there are several elements typically contained in an ECR that are not contained in this document. These elements include additional chapters and discussion of cultural history, laws and regulatory inventory, recreation inventory, fire history and fire management inventory, and environmental education. These additional chapters should be added to this ECR as resources become available. i Acknowledgements We are grateful to all those who helped with this project over the last four years. Especially Vickie Newlin our Butte County Project Manager who helped usher this project through the County and State mazes from inception to completion. Thanks go to Dennis Heiman, Richard Price, Kristin Cooper-Carter, Jeff Wright, Norma Myers, Bob Jackson and Ken Derucher for invaluable help during the course of this project. Thanks to Mike Reid our State Water Resources Control Board Contract Manager, who was supportive and readily available. We are grateful to all the landowners who participated in the stream survey by allowing us access to their property. Thanks to Phil Johnson and Steve Stangle for helping with the stream survey in the Mountain Zone and Scott Chamberlain for helping with the bird survey. Thanks goes to all those who have participated in Steering Committee and Stakeholder meetings. We appreciated the comments of our reviewers, especially Guy Chetelat, Rich Reiner, Dave Wood, Joe Silveira, Dan Breedon, Rob Hill, and Pia Sevelius. Finally we thank our families and friends for all their support during this extensive project. Proposition 204 funding from the State Water Resources Control Board through Butte County made this large-scale effort possible. ii Table of Contents List of Tables…………………………………………………………………………………….vi List of Figures…………………………………………………………………………………..vii List of Appendices……………………………………………………………………………..viii 1 INTRODUCTION 1 1.1 Little chico creek watershed location ............................................................................. 1 1.2 Geology........................................................................................................................... 2 1.3 Soils................................................................................................................................. 2 1.4 Climate............................................................................................................................ 2 1.5 History of the Little Chico Creek Watershed Group ...................................................... 3 1.6 Background and Overview of the Existing Conditions Report ...................................... 5 2 VEGETATION, FISH AND WILDLIFE WITH AN EMPHASIS ON RIPARIAN HABITAT AND FISHERIES 7 2.1 Overview......................................................................................................................... 7 2.1.1 Zone descriptions.................................................................................................... 7 2.1.2 Sampling Methods .................................................................................................. 7 2.1.3 Surface hydrology................................................................................................. 11 2.2 Mountain Zone.............................................................................................................. 13 2.2.1 Physical Setting: geology, topography & geomorphology................................... 13 2.2.2 Vegetation............................................................................................................. 15 2.2.3 Wildlife ................................................................................................................. 17 2.2.4 Aquatic Habitat ..................................................................................................... 18 2.2.5 Fish........................................................................................................................ 18 2.2.6 Aquatic Macroinvertebrates.................................................................................. 18 2.2.7 Aquatic fauna........................................................................................................ 18 2.3 Canyon Zone................................................................................................................. 19 2.3.1 Physical Setting: geology, topography & geomorphology................................... 19 2.3.2 Vegetation............................................................................................................. 19 2.3.3 Wildlife ................................................................................................................. 22 2.3.4 Aquatic Habitat ..................................................................................................... 22 2.3.5 Fish........................................................................................................................ 22 2.3.6 Aquatic Macroinvertebrates.................................................................................. 23 2.3.7 Aquatic fauna........................................................................................................ 23 2.4 Urban Zone ................................................................................................................... 23 2.4.1 Physical Setting: geology, topography & geomorphology................................... 23 2.4.2 Vegetation............................................................................................................. 24 2.4.3 Wildlife ................................................................................................................. 24 2.4.4 Aquatic Habitat ..................................................................................................... 25 2.4.5 Fish........................................................................................................................ 26 2.4.6 Aquatic Macroinvertebrates.................................................................................. 26 2.4.7 Aquatic fauna........................................................................................................ 26 2.5 Agricultural Zone.......................................................................................................... 26 2.5.1 Physical Setting: geology, topography & geomorphology................................... 26 2.5.2 Vegetation............................................................................................................. 27 iii 2.5.3 Wildlife ................................................................................................................. 28 2.5.4 Aquatic Habitat ..................................................................................................... 29 2.5.5 Fish........................................................................................................................ 29 2.5.6 Aquatic Macroinvertebrates.................................................................................. 29 2.5.7 Aquatic fauna........................................................................................................ 29 2.6 Summary of Wildlife .................................................................................................... 30 2.6.1 Valley elderberry longhorn beetle ........................................................................ 31 2.6.2 East Tehama Deer Herd........................................................................................ 31 2.6.3 Introduced Vertebrate Species .............................................................................. 32 2.7 Summary of Fish Survey .............................................................................................. 32 3 WATER QUALITY 35 3.1 Introduction................................................................................................................... 35 3.2 Review of Existing Data ............................................................................................... 35 3.2.1 Multi-zone Data/Studies ....................................................................................... 36 3.2.2 Mountain and Canyon Zones................................................................................ 38 3.2.3 Urban Zone ........................................................................................................... 38 3.2.4 Agricultural Zone.................................................................................................. 45 3.3 Project monitoring ReSULTS March 2001 - May 2002............................................... 45 3.3.1 Approach..............................................................................................................
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