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Technical Memorandum
Analysis and Technical Update to the Colorado Water Plan Technical Memorandum Prepared for: Colorado Water Conservation Board Project Title: Current and 2050 Planning Scenario Water Supply and Gap Results Date: September 18, 2019 Prepared by: Wilson Water Group Reviewed by: Jacobs, Brown & Caldwell Technical Update Water Supply and Gap Results Table of Contents Section 1 : Introduction ................................................................................................................................. 10 Section 2 : Definitions and Terminology ........................................................................................................ 11 Section 3 : SWSI 2010 Water Supply Methodology....................................................................................... 12 Section 4 : Technical Update Water Supply Methodology ............................................................................ 15 4.1 Current/Baseline Water Supply Methodology .......................................................................... 15 4.1.1 CDSS Basin Water Supply Methodology ..................................................................................... 16 4.1.2 Non-CDSS Basin Water Supply Methodology ............................................................................. 19 4.2 Planning Scenario A-E Water Supply Methodology .................................................................. 21 4.2.1 Planning Scenario Water Supply Adjustments ........................................................................... -
Historical Range of Variability and Current Landscape Condition Analysis: South Central Highlands Section, Southwestern Colorado & Northwestern New Mexico
Historical Range of Variability and Current Landscape Condition Analysis: South Central Highlands Section, Southwestern Colorado & Northwestern New Mexico William H. Romme, M. Lisa Floyd, David Hanna with contributions by Elisabeth J. Bartlett, Michele Crist, Dan Green, Henri D. Grissino-Mayer, J. Page Lindsey, Kevin McGarigal, & Jeffery S.Redders Produced by the Colorado Forest Restoration Institute at Colorado State University, and Region 2 of the U.S. Forest Service May 12, 2009 Table of Contents EXECUTIVE SUMMARY … p 5 AUTHORS’ AFFILIATIONS … p 16 ACKNOWLEDGEMENTS … p 16 CHAPTER I. INTRODUCTION A. Objectives and Organization of This Report … p 17 B. Overview of Physical Geography and Vegetation … p 19 C. Climate Variability in Space and Time … p 21 1. Geographic Patterns in Climate 2. Long-Term Variability in Climate D. Reference Conditions: Concept and Application … p 25 1. Historical Range of Variability (HRV) Concept 2. The Reference Period for this Analysis 3. Human Residents and Influences during the Reference Period E. Overview of Integrated Ecosystem Management … p 30 F. Literature Cited … p 34 CHAPTER II. PONDEROSA PINE FORESTS A. Vegetation Structure and Composition … p 39 B. Reference Conditions … p 40 1. Reference Period Fire Regimes 2. Other agents of disturbance 3. Pre-1870 stand structures C. Legacies of Euro-American Settlement and Current Conditions … p 67 1. Logging (“High-Grading”) in the Late 1800s and Early 1900s 2. Excessive Livestock Grazing in the Late 1800s and Early 1900s 3. Fire Exclusion Since the Late 1800s 4. Interactions: Logging, Grazing, Fire, Climate, and the Forests of Today D. Summary … p 83 E. Literature Cited … p 84 CHAPTER III. -
Rio Grande Compact Commission Report
3 RIO GRANDE COMPACT COMMISSION REPORT RIO GRANDE COMPACT The State of Colorado, the State of New Mexico, and the State of Texas, desiring to remove all causes of present and future controversy among these States and between citizens of one of these States and citizens of another State with respect to the use of the waters of the Rio Grande above Fort Quitman, Texas, and being moved by considerations of interstate comity, and for the purpose of effecting an equitable apportionment of such waters, have resolved to conclude a Compact for the attainment of these purposes, and to that end, through their respective Governors, have named as their respective Commissioners: For the State of Colorado M. C. Hinderlider For the State of New Mexico Thomas M. McClure For the State of Texas Frank B. Clayton who, after negotiations participated in by S. O. Harper, appointed by the President as the representative of the United States of America, have agreed upon the following articles, to- wit: ARTICLE I (a) The State of Colorado, the State of New Mexico, the State of Texas, and the United States of America, are hereinafter designated “Colorado,” “New Mexico,” “Texas,” and the “United States,” respectively. (b) “The Commission” means the agency created by this Compact for the administration thereof. (c) The term “Rio Grande Basin” means all of the territory drained by the Rio Grande and its tributaries in Colorado, in New Mexico, and in Texas above Fort Quitman, including the Closed Basin in Colorado. (d) The “Closed Basin” means that part of the Rio Grande Basin in Colorado where the streams drain into the San Luis Lakes and adjacent territory, and do not normally contribute to the flow of the Rio Grande. -
Rio Grande and Conejos Counties, Colorado Volume II: a Natural Heritage Inventory and Assessment of Wetlands and Riparian Areas in Rio Grande and Conejos Counties
Biological Inventory of Rio Grande and Conejos Counties, Colorado Volume II: A Natural Heritage Inventory and Assessment of Wetlands and Riparian Areas in Rio Grande and Conejos Counties Colorado Natural Heritage Program College of Natural Resources, 254 General Services Building Colorado State University Fort Collins, Colorado 80523 Biological Inventory of Rio Grande and Conejos Counties, Colorado Volume II: A Natural Heritage Inventory and Assessment of Wetlands and Riparian Areas in Rio Grande and Conejos Counties Prepared for: Colorado Department of Natural Resources 1313 Sherman Street Room 718 Denver, Colorado 80203 Prepared by: Joe Rocchio, Denise Culver, Steve Kettler, and Robert Schorr March 2000 Colorado Natural Heritage Program College of Natural Resources 254 General Services Building Colorado State University Fort Collins, Colorado 80523 ii USER’S GUIDE The Biological Inventory of Rio Grande and Conejos Counties, conducted by the Colorado Natural Heritage Program, consists of two essentially distinct projects that are highly integrated with respect to methodology and fieldwork. This report reflects the separate nature of the projects by being organized in a two-volume set. Both projects utilized the same Natural Heritage methodology that is used throughout North America, and both searched for and assessed the plants, animals, and plant communities on the Colorado Natural Heritage Program’s list of rare and imperiled elements of biodiversity. Each volume prioritizes potential conservation areas based on the relative significance of the biodiversity they support and the urgency for protection of the site. All information explaining Natural Heritage methodology and ranks is repeated in each volume, so that each volume can stand-alone and be used independently of the other. -
Sources of Water to the Rio Grande Upstream from San Marcial, New
Surface-water use is defined as the percent); other categories of surface- discharge has some error associated the following gaging stations represents vegetation, evaporation from open- mountainous regions in the northern volume of surface water diverted or water use include public supply, with it. No attempt has been made to tributary inflow from the San Juan water surfaces, and losses to the part of the watershed are the largest withdrawn from a river channel or commercial, domestic, industrial, quantify the error associated with the Mountains to the Rio Grande: Rio ground-water system. Increases and sources of water to the Rio Grande. source (Wilson and Lucero, 1997, p. 71- mining, thermoelectric, and livestock. mean annual discharge for each gaging Grande at Thirtymile Bridge, near decreases in mean annual discharge may Irrigation, the largest category of 74). After this water has been used, it station. Creede, Colorado (reference no. 1; be estimated for any given reach (the surface-water use in the Rio Grande 3 Sources of Water to the Rio Grande Upstream from may be returned to the river channel (for To evaluate water use in different 214 ft /s), Willow Creek at Creede, area of the watershed between any two watershed, generally results in 3 gaging stations) of the Rio Grande by decreases in mean annual discharge example, by return flows from parts of the watershed and to examine At some locations in the watershed, Colorado (reference no. 3; 22 ft /s), San Marcial, New Mexico agricultural areas) or it may leave the possible causes of variations in particularly in agricultural areas, water comparing all measured inflow (which throughout the surface-water system. -
Integrated Water Quality Monitoring and Assessment Report Summarizes Water Quality Conditions in the State of Colorado
Integrated Water Quality Monitoring and Assessment Report State of Colorado Prepared Pursuant to Section 303(d) and Section 305(b) of the Clean Water Act 2012 Update to the 2010 305(b) Report Prepared by: Water Quality Control Division, Colorado Department of Public Health and Environment From the highest sand dunes in Executive Summary North America to 54 mountain peaks over 14,000 feet, Colorado has one of the most unique and varied natural The Colorado 2012 Integrated Water Quality Monitoring and Assessment Report summarizes water quality conditions in the State of Colorado. This landscapes in the entire nation. report fulfills Clean Water Act (CWA) Section 305(b) which requires all Throughout the state, there exist states to assess and report on the quality of waters within their State. This lush green forests, fields of report fulfills Colorado’s obligation under the Clean Water Act, and covers vibrant wildflowers, picturesque the 2010-2011 two-year period. mountain lakes, abundant grasslands and rich red rock formations. There are many This report provides the State’s assessments of water quality that were places to enjoy Colorado’s vast conducted during the past five years. Specifically, it compares the classified natural beauty, with four uses of all surface waters within the State to the corresponding standards in national parks, five national order to assess the degree to which waters are in attainment of those monuments and 41 state parks standards. The Integrated Report (IR) provides the attainment status of all waiting to be explored. surface waters according to the 5 reporting categories, defined in detail within. -
Colorado's 303(D) List of Impaired Waters
COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT WATER QUALITY CONTROL COMMISSION 5 CCR 1002-93 REGULATION #93 COLORADO'S SECTION 303(D) LIST OF IMPAIRED WATERS AND MONITORING AND EVALUATION LIST 93.1 Authority These regulations are promulgated pursuant to section 25-8-101 et seq C.R.S. as amended, and in particular, 25-8-202 (1) (a), (b), (i), (2) and (6); 25-8-203 and 25-8-204. 93.2 Purpose This regulation establishes Colorado’s Lists of Impaired Waters. These waters include Water- Quality-Limited Segments Requiring Total Maximum Daily Loads (“TMDLs”), impaired waters that do not require a TMDL, and Colorado’s Monitoring and Evaluation List: (1) The list of Water-Quality-Limited Segments Requiring TMDLs fulfills requirements of section 303(d) of the federal Clean Water Act which requires that states submit to the U.S. Environmental Protection Agency a list of those waters for which technology-based effluent limitations and other required controls are not stringent enough to implement water quality standards. These segments are included in Section 93.3 with parameters included in the Clean Water Section 303(d) Impairment column. (2) Colorado’s Monitoring and Evaluation List identifies water bodies where there is reason to suspect water quality problems, but there is also uncertainty regarding one or more factors, such as the representative nature of the data. Water bodies that are impaired, but it is unclear whether the cause of impairment is attributable to pollutants as opposed to pollution, are also placed on the Monitoring and Evaluation List. This Monitoring and Evaluation list is a state-only document that is not subject to EPA approval. -
WATERLOGGING CONTROL for IMPROVED WATER and LAND USE EFFICIENCIES: a SYSTEMATIC ANALYSIS by Angus Simpson· H.J
WATERLOGGING CONTROL FOR IMPROVED WATER AND LAND USE EFFICIENCIES: A SYSTEMATIC ANALYSIS by Angus Simpson· H.J. Morel-Seytoux R.A. Young' with G.E. Radosevich W.T. Franklin December 1980 Completion Report No. 108 WATERLOGGING CONTROL FOR IMPROVED WATER AND LAND USE EFFICIENCIES: • A SYSTEMATIC ANALYSIS Completion Report OWRT Project 14-34-0001-621l-C-7144 by Angus Simpson, H. J. Morel-Seytoux, and R. A. Young with G. E. Radosevich and W. T. Franklin Departments of Civil Engineering, Economics, and Agronomy Colorado State University Fort Collins, Colorado Submitted to Office of Water Research and Technology U.S. Department of the Interior Washington, D.C. 20240 December, 1980 The work upon which this report is based was supported in part by funds provided by the U.S. Department of the Interior, Office of Water Research and Technology, as authorized by the Water Resources Research Act of 1964, pursuant to Grant Agreement No. 14-34-0001-6211, by the Ministry of Agriculture and Water, Kingdom of Saudi Arabia, through the U.S. Department of Agriculture, Office of International Cooperation and Development (Agreement No. 58-319R-8-l34) and by the Colorado State University Experiment Station. Contents of this publication do not necessarily reflect the views and policies of the Office of Water Research and Technology, U.S. Depart ment of the Interior, nor does the mention of trade names or commercial products constitute their endorsement or recommendation for use by the U.S. Government. COLORADO WATER RESOURCES RESEARCH INSTITUTE Colorado State University Fort Collins, Colorado 80523 Norman A. Evans, Director ABSTRACT The problems of waterlogging and salinization are often associated with irrigated agriculture. -
Hydrogeology of the San Luis Valley, Colorado: an Overview
HYDROGEOLOGY OF THE SAN LUIS VALLEY, COLORADO AN OVERVIEW—AND A LOOK AT THE FUTURE By Philip A. Emery Al2O3Geohydrology 2910 Star Drive Lake Havasu City, Arizona 86406 A note from the author—During the period Most of the streamflow is derived from snowmelt 1966–1980, I was either collecting data, interpreting data, or from about 4,700 mi2 of watershed in the surrounding writing reports regarding the San Luis Valley. Other duties mountains. The northern part of the valley is internally at other locales prevented me from working nearly full time drained and is referred to as the “closed basin”. The lowest on the valley, as I did from 1966 to 1972. In any case, I part of the closed basin is known locally as the “sump”. devoted considerable time and effort investigating the val- The southern part of the valley is drained by the Rio Grande ley’s water resources and, therefore, I am both honored and and its major tributary the Conejos River. pleased to author this paper for GSA. The U.S. Geological The climate of the San Luis Valley is arid and is Survey transferred me to Alamosa 30 years ago when I was characterized by cold winters, moderate summers, and appointed Project Chief of a 5-year hydrologic study of the much sunshine. The average annual precipitation is about San Luis Valley. I departed Colorado in 1972. I returned to 7.5 inches and potential evapotranspiration exceeds the valley in 1979 to testify in a trial regarding rules and 40 inches. Average annual temperature is about 42°F, with regulations proposed by the Colorado State Engineer, and extremes of -50°F and 91°F. -
Draft Draft Draft Draft 10/31/05
Binational Rio Grande Summit Cooperation for a Better Future Cooperación para un Futuro Mejor Cumbre Binacional del Río Bravo November 17-18, 2005 Reynosa,Tamaulipas & McAllen, Texas BACKGROUND DOCUMENT International Boundary and Water Commission United States and Mexico “Lasting peace will come from the careful, patient, practical solution of particular problems.” ---United States President Lyndon B. Johnson “The factors that unite us are enough to construct a solid pedestal of enduring friendship.” ---Mexican President Adolfo Lopez Mateos Remarks at El Paso, Texas-Ciudad Juarez, Chihuahua, September 25, 1964, regarding the Chamizal Project on the Rio Grande, which settled a longstanding boundary dispute between the United States and Mexico. Binational Rio Grande Summit Background Document INDEX Page # Message from the Commissioners ........................................................................................... 4 Introduction................................................................................................................................ 5 The International Boundary and Water Commission............................................................ 5 Geography and Hydrology of the Rio Grande Basin ............................................................ 6 Convention of 1906 .................................................................................................................... 8 1944 Water Treaty .................................................................................................................... -
A Historical Analysis of Environmental and Energy Law in Colorado
Volume 28 Issue 1 Article 1 5-1-2017 Clearing the Fog: A Historical Analysis of Environmental and Energy Law in Colorado Lucas C. Satterlee Follow this and additional works at: https://digitalcommons.law.villanova.edu/elj Part of the Energy and Utilities Law Commons, and the Environmental Law Commons Recommended Citation Lucas C. Satterlee, Clearing the Fog: A Historical Analysis of Environmental and Energy Law in Colorado, 28 Vill. Envtl. L.J. 1 (2017). Available at: https://digitalcommons.law.villanova.edu/elj/vol28/iss1/1 This Article is brought to you for free and open access by Villanova University Charles Widger School of Law Digital Repository. It has been accepted for inclusion in Villanova Environmental Law Journal by an authorized editor of Villanova University Charles Widger School of Law Digital Repository. Satterlee: Clearing the Fog: A Historical Analysis of Environmental and Ener VILLANOVA ENVIRONMENTAL LAW JOURNAL VOLUME XXVIII 2017 ISSUE 1 CLEARING THE FOG: A HISTORICAL ANALYSIS OF ENVIRONMENTAL AND ENERGY LAW IN COLORADO LUCAS SATTERLEE* I. INTRODUCTION The intersection of energy extraction and environmental issues shapes Colorado’s economy, its people, politics, and virtually every aspect of life within the state.1 Colorado boasts a diverse bounty of energy resource wealth.2 These reserves, along with other natural resources, are deeply entrenched in the state’s history.3 Ever since settlers rushed into the Rocky Mountains in search of gold in the late nineteenth century, the state’s cultural and economic identity has been “linked [closely to] the extraction of natural resources.”4 Early pioneers and boosters quickly discovered that hydrocarbons, “the buried life force of the distant past,” were capable of invigo- rating the state’s economy.5 That trend of developing fossil fuel * J.D., 2016, University of Denver Sturm College of Law, B.A., 2012, Miami University. -
THE COLORADO MAGAZINE Published Bi-Monthly by the State Historical Society of Colorado
THE COLORADO MAGAZINE Published bi-monthly by The State Historical Society of Colorado VOL. XI Denver, Colorado, July, 1934 No. 4 The Founding of Salida, Colorado1 RICHARD CARROLL* A party of Denver and Rio Grande Railroad engineers, work ing under the supervision of Gov. Alexander C. Hunt, surveyed the townsite of South Arkansas (Salida) late in April, 1880. 'Villiam Van Every, Governor Hunt's agent, made additional surYeys early in May. The original plat, which was not filed in the office of the County Clerk until 10 :30 a. m., September 21, 1880, included the following area: Front Street to Fifth Street and from D Street to L Street. The town was located, not as a result of the growth of early settlements, but in the same manner and for the same purposes as Colorado Springs, South Pueblo, and later, Durango. Land consti tuting South Arkansas, as it was primarily laid off, was home steaded by Luther Baker and J ooiah Hulbert, their dates of entry being February 16 and 18, 1880. Baker and Hulbert subsequently sold their homesteads to Governor Hunt, each receiving $500. Other land was homesteaded later and several additions were made to the town, which included the two Van Every homesteads, or the Eddy Addition on the upper mesa; George W. Haskell's homestead and addition; and D. E. Kelsey's homestead and addition. R. N. Scott homesteaded the land constituting the Babcock addition in 1879. One century prior to the founding of South Arkansas, or in 1779, Juan Bautista de Anza, Governor of New Mexico, visited this region.