Animas Watershed Plan

• Document ID: 0002
• County: San Juan
• County: La Plata
• Stream Name: Animas River
• Basin: San Juan/Dolores
• Sub-Basin: Animas 14080104
• Water Division: 7
• Title: Animas River Wateshed Plan, The
• Prepared By: Animas River Stakeholders Group
• Watershed Pro - Doc Type: Planning Report

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TABLE OF CONTENTS
Page
I. INTRODUCTION ...........................................................•---..........-•----...--•-•--•---------- 4
II. PROBLElIi DESCRIPTION: CAUSE AND SOURCE IDENTIFICATION ........... 4
III. REMEDIATION METHODS ...............•-••-•------•------........---...................._.............. 5
Introduction to Remediation Methods ........................................•-----...----------•--. 7
Surface Hydrologic Controls -----•------•--------------------------------•---•-----................-.... 7
Subsurface Hydrologic Controls ..............................................•---.............. 8
Passive Treatment Techniques ........................................................•--........ 9
I~'. RE~iEDLATI01`T ICI THE UPPER ANIMAS BASH`T ........................................... 12
Challenges in Doing Remediation ................................................................... 12
Remediation Ranking and Prioritization-• ........................................................ 13
Mine Waste Piles-----------------•-•-••--•-----.....-•-•---•-•---.................................... 13
Draining Adits...........-• .....................••--••---.....................---•---.................. 14
Loading from Largest Adit and Mine Waste Sources ...................................... 18
V. REMEDIATION SCENARIOS-------------••-•---•--•--•----••----...-----•---......._.................... 22
Metal Reduction Scenarios ...........................•------.........................................._ 23
Effects of Remediation on Water Quality ........................................................ 24
Animas above Silverton, A68 ..............................•--..-....----........-----......... 37
Cement Creek at Silverton, CC48 ............................................................ 37
Mineral Creek near Silverton, M34 ..........................................•-•-..........._ 37
Animas River below Silverton, A72 ......................................................... 38
Reductions in pH-• .....................................•--.................................................. 38
Remediation Summary -••-•-•-•----•-----•--•-• .............••-----..............................-•-••--- 38
VI. REl/iEDIATION FUNDING AND TECHNICAL ASSISTANCE ....................... 39
VII. '1~i0~'•ITORIitiG ......................................•---..........-•---........................................39
ti'III. EDLCATIO'_ti ..• ...................••---.......•-------.............---......................................... 40
IX. SCHEDULE .-•-----...-•----•----•-•----•-••---•----•• ...................••-•-•----............._..........---...._ 40
X. h~IIL,ESTONES ...................................................................................................... 40
XI. MEASUREMENT OF ACHIE~'EMENT ............................................................. 40
REFERE'`TCES .--------••--••----• ....................•--•--........................---.......-•---•-•-................. 41
APPENDIX A - AI`ZMAS UAA TABLE OF CONTENTS ........•-• ........................... 42