CITY OF SPOKANE VALLEY SHORELINE MASTER PROGRAM UPDATE SHORELINE INVENTORY AND CHARACTERIZATION REPORT [PUBLIC REVIEW DRAFT] [Amended September 7, 2010] City of Spokane Valley 11707 East Sprague Ave. Spokane Valley, WA 99206 September 7, 2010 CITY OF SPOKANE VALLEY SHORELINE MASTER PROGRAM UPDATE SHORELINE INVENTORY AND CHARACTERIZATION REPORT [PUBLIC REVIEW DRAFT] [Amended September 7, 2010] City of Spokane Valley Community Development Department 11707 East Sprague Ave. Spokane Valley, WA 99206 Prepared by 920 North Argonne Rd. Spokane, Washington 99212 in association with Jim Kolva Associates and Michael Folsom City of Spokane Valley Shoreline Master Program Update September 7, 2010 Inventory and Characterization Report [PUBLIC REVIEW DRAFT] TABLE OF CONTENTS LIST OF ACRONYMS iv 1.0 INTRODUCTION ..........................................................................................................................................1 1.1 PURPOSE AND GOALS OF THE INVENTORY & CHARACTERIZATION REPORT .................................................1 1.2 SMA JURISDICTION WITHIN THE CITY OF SPOKANE VALLEY .......................................................................2 2.0 METHODOLOGY.........................................................................................................................................5 2.1 INITIAL DATA COLLECTION AND GAP ANALYSIS..........................................................................................5 2.2 FIELD INVENTORY ........................................................................................................................................6 2.2.1 Vegetation Survey Protocol .....................................................................................................................7 2.3 ANALYSIS OF COLLECTED DATA ..................................................................................................................7 3.0 REGIONAL CHARACTERIZATION ........................................................................................................9 3.1 SPOKANE VALLEY-RATHDRUM PRAIRIE AQUIFER........................................................................................9 3.2 SPOKANE RIVER..........................................................................................................................................10 3.3 SHELLEY LAKE ...........................................................................................................................................17 3.4 GRAVEL PITS ..............................................................................................................................................18 3.5 REGIONAL PROCESSES, STRESSORS AND OPPORTUNITIES FOR IMPROVEMENT ...........................................18 4.0 HISTORICAL ANALYSIS .........................................................................................................................22 4.1 SPOKANE RIVER..........................................................................................................................................22 4.2 SHELLEY LAKE ...........................................................................................................................................25 4.3 PARK ROAD AND SULLIVAN ROAD GRAVEL PITS .......................................................................................25 5.0 LOCAL CHARACTERIZATION..............................................................................................................26 5.1 SPOKANE RIVER..........................................................................................................................................26 5.1.1 Spokane River Study Segment 1- Eastern City Limits to Flora Road ....................................................30 5.1.1.1 SR-1 Land Use Summary .................................................................................................................................. 31 5.1.1.2 SR-1 Physical and Biological Characterization ................................................................................................. 34 5.1.1.3 SR-1 Ecological Condition, Stressors, and Opportunities for Restoration or Conservation............................... 36 5.1.2 Spokane River Study Segment 2 – Flora Road to Trent Avenue ............................................................38 5.1.2.1 SR-2 Land Use Summary .................................................................................................................................. 38 5.1.2.2 SR-2 Physical and Biological Characterization ................................................................................................. 42 5.1.2.3 SR-2 Ecological Condition, Stressors, and Opportunities for Restoration or Conservation............................... 44 5.1.3 Spokane River Study Segment 3- Trent Avenue to Millwood Town Limits ............................................45 5.1.3.1 SR-3 Land Use Summary .................................................................................................................................. 46 5.1.3.2 SR-3 Physical and Biological Characterization ................................................................................................. 48 5.1.3.3 SR-3 Ecological Condition, Stressors, and Opportunities for Restoration or Conservation............................... 50 5.1.4 Segment 4- Millwood City Limits to Spokane City Limits......................................................................51 5.1.4.1 SR- 4 Land Use Summary ................................................................................................................................. 52 5.1.4.2 SR-4 Physical, Biological, and Archeological Characterization........................................................................ 53 5.1.4.3 SR-4 Ecological Condition, Stressors, and Opportunities for Restoration or Conservation............................... 54 5.2 SHELLEY LAKE ...........................................................................................................................................55 5.2.1 Land Use Summary................................................................................................................................55 5.2.1.1 Shelley Lake Physical and Biological Characterization..................................................................................... 57 5.2.1.2 Shelley Lake Ecological Condition, Stressors, and Opportunities for Restoration or Conservation.................. 59 5.3 PARK ROAD AND SULLIVAN ROAD GRAVEL PITS .......................................................................................61 5.3.1 Park Road Pit ........................................................................................................................................62 5.3.1.1 Park Road Pit Land Use Summary..................................................................................................................... 62 5.3.1.2 Park Road Pit Physical and Biological Characterization.................................................................................... 63 5.3.1.3 Park Road Pit Ecological Condition, Stressors, and Opportunities for Restoration or Conservation................. 64 5.3.2 Sullivan Road Pit ...................................................................................................................................64 5.3.2.1 Sullivan Road Pit Land Use Summary............................................................................................................... 64 5.3.2.2 Sullivan Road Pit Physical and Biological Characterization.............................................................................. 65 5.3.2.3 Sullivan Road Pit Ecological Condition, Stressors, and Opportunities for Restoration or Conservation........... 66 i City of Spokane Valley Shoreline Master Program Update September 7, 2010 Inventory and Characterization Report [PUBLIC REVIEW DRAFT] 6.0 SHORELINE USE ANALYSIS ..................................................................................................................67 6.1 CURRENT SHORELINE USE ..........................................................................................................................67 6.2 PROJECTED SHORELINE USE .......................................................................................................................68 6.3 POTENTIAL CONFLICTS ...............................................................................................................................70 6.4 MANAGEMENT RECOMMENDATIONS ..........................................................................................................71 6.4.1 Recommendations for the Spokane River...............................................................................................72 6.4.2 Shelley Lake...........................................................................................................................................74 6.4.3 Gravel Pits.............................................................................................................................................75 7.0 LIST OF PREPARERS ...............................................................................................................................76 8.0 BIBLIOGRAPHY.........................................................................................................................................77 FIGURES* Figure 1-1: City of Spokane Valley Shoreline Master Program