Humboldt River Chronology an Overview and Chronological History of the Humboldt River and Related Water Issues
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Humboldt River Chronology An Overview and Chronological History of the Humboldt River and Related Water Issues The information contained in Volume 1, Part I – Overview of this Humboldt River Chronology provides a general overview and description of the Humboldt River Basin and Humboldt River and its physical, geologic, and hydrologic characteristics and attributes. Volume 2, Part II – Pre-Twentieth Century and Part III – Twentieth and Twenty-First Centuries contain a detailed listing by date of some of the more important events associated with the Humboldt River Basin, the Humboldt River, sub-basins and various tributaries, storage reservoirs, water diversions, and related water supply, water use, water rights, water resources development, fisheries and habitat, and environmental and water quality issues. Part I – Overview Introduction The Humboldt River Basin is an extensive river drainage system located in north-central Nevada and extending in a generally east-to-west direction from its headwaters in the Jarbidge, Independence and Ruby Mountains in Elko County, to its terminus in the Humboldt Sink, approximately 225 miles away in the desert of northwest Churchill County. The basin encompasses an area of approximately 16,840 square miles and is the only major river system wholly contained within the State of Nevada. Connecting the Humboldt River’s lofty mountain sources of water to the basin’s terminus is the 310- mile long Humboldt River, which, by some claims, is actually about twice that in length accounting for its countless meanders.1 One particularly interesting observation in a U.S. Army Corps of Engineers report’s background study dealt with the meandering flow of the Humboldt River. The report noted that the river’s overall length from near Wells to the Humboldt Sink was approximately 300 miles. However, “the actual length of the river was much more than this due to its extensive meandering from side to side of the valleys. At numerous points along the river the direction of flow is transverse and even opposite to the general slope of the valley, and in one valley 130 miles long it is estimated the river flows 380 miles.”2 From the river’s origin near Wells, Nevada, to the Humboldt Sink, located southwest of Lovelock, the river drops in elevation by approximately 1,675 feet. The importance of the Humboldt River and the Humboldt River Valley to early emigration is well documented in the history of the West. The river’s course cutting directly through Nevada’s basin and range topography became a primary route for the California Emigrant Overland Trail through Nevada beginning in the early 1840’s and lasting into the early 1870’s. With the completion of the transcontinental railroad in 1869, the route down the Humboldt River became a major east-west railroad passage and, through various phases of highway construction, eventually evolved into present-day U.S. Interstate 80. The earliest use of the Humboldt River Basin by Europeans was for trapping beaver. Later the river provided water to scattered agricultural activities which served the needs of early emigrant wagon trains. Upon the discovery of silver ore in the lower Humboldt basin in 1860, the economic focus shifted to the development of the river basin’s natural and mineral resources. The resultant influx of Nevada Water Basin Information and Chronology Series I–1 Humboldt River Chronology—Part I DIVISION OF WATER PLANNING people dramatically increased the demands for agricultural produce, necessitating more intensive use of the basin’s extensive rangelands for livestock grazing. By the early 1870’s, extensive ranching and open-range grazing operations stretched virtually from one end of the basin to the other and reached up every major stream and tributary to the Humboldt River. By the late 1800’s, most of the basin’s mining activities had lapsed into near-dormancy, but the extensive rail and road transportation systems that mining had fostered now amply served the needs of an expanding farming and ranching industry. Agriculture and transportation effectively dominated the Humboldt River Basin’s economy up until the late 1980’s, when gold production, primarily along the Carlin Trend in western Elko County and northern Eureka County, turned the basin into the largest producer of gold in the United States. Throughout the late 1980’s and early 1990’s, the mining industry came to dominate the economies of the principal counties in the Humboldt River Basin. The Humboldt River Basin encompasses significant portions of five Nevada counties – Elko, Eureka, Lander, Humboldt and Pershing – and also includes smaller portions of three other counties – White Pine (upper Huntington Valley), Nye County (upper Reese River Valley) and Churchill County (Humboldt Sink).3 The Humboldt River Basin, or Nevada Hydrographic Region 4, is one of 14 hydrographic regions, basins or watersheds designated within the State of Nevada.4 The Humboldt River Basin is sub-divided into 33 hydrographic areas with one area sub-divided into a hydrographic sub-area. A hydrographic area typically represents a defined valley drainage area5 or some other discreet drainage system within a larger hydrographic region, basin or watershed. Appendix 1 to Part I lists the hydrographic areas located within the Humboldt River Basin along with the area or valley names, surface areas, counties of coverage and whether they have been designated by the Nevada State Engineer for additional administration.6 For purposes of this overview of the Humboldt River Basin, the hydrographic areas have been aggregated into eleven “sub-basins”, each of which consists of one or more hydrographic area. The sub-basin designation allows for more detailed analysis of the region’s hydrographic and geographic characteristics than provided by the total basin or watershed concept, while at the same time providing a more comprehensive assessment than that possible using the individual hydrographic areas. The sections which follow present detailed information and analysis of the Humboldt River Basin’s physical and geographic characteristics, river reaches and stream segments, major tributaries, water- related issues, stream flows, the eleven defined sub-basins, water rights and the river’s adjudication process, reservoirs and storage facilities, mining and mine dewatering, agriculture, changes in rangeland conditions, livestock grazing, erosion, flooding, cheatgrass invasion and wildfires, and snowpack water content trends and related matters. Also presented at the end of this overview is a section on climatic changes which have taken place during the Pleistocene Epoch (approximately 2 million years ago to about 11,000 years ago) and the Holocene Epoch (about 11,000 years ago to the present) and the effects on the hydrology of the Great Basin and the Humboldt River Basin. The Great Basin and the Humboldt River Basin The Humboldt River Basin lies wholly within a vast Intermountain region which was first recognized I–2 Nevada Water Basin Information and Chronology Series DIVISION OF WATER PLANNING Humboldt River Chronology—Part I for its unique geophysical structure by John C. Frémont, who fittingly named it the “Great Basin”.7 The hydrographic8 Great Basin is defined as an area of internal drainage systems bordered by the Rocky Mountains on the east, the Sierra Nevada9 on the west, the Columbia Plateau on the north and the Colorado Plateau on the south. Surface waters within this expansive area never reach the ocean, but are confined to closed basins which ultimately drain to terminal lakes, playas, or sinks. The Great Basin covers an area of approximately 205,780 square miles (131,699,230 acres or 532,970 square kilometers) and includes nearly all of Nevada, much of eastern California, western Utah, southeastern Oregon, and portions of southern Idaho. Within Nevada, four designated hydrographic regions, basins or watersheds constitute the northern boundary of the Great Basin. These include the Northwest Region (Nevada Hydrographic Region 1),10 the Black Rock Desert Region (Nevada Hydrographic Region 2),11 the Humboldt River Basin (Nevada Hydrographic Region 4),12 and the Great Salt Lake Basin (Nevada Hydrographic Region 11).13 Of these four hydrographic regions, only the Humboldt River Basin is wholly contained within Nevada. The Great Basin is characterized by considerable variation in its topography, with one record example for adjacent valley bottoms and mountain tops being the vertical relief of 11,331 feet between Badwater in Death Valley (282 feet below mean sea level, or MSL) and nearby Telescope Peak in the Panamint Range (11,049 feet MSL).14 The most extreme example of this variable topography within the Great Basin is the elevation difference of 14,744 feet MSL over a distance of 84 miles which separates Death Valley’s Badwater site from the summit of Mount Whitney (14,462 feet MSL).15 More typically, the difference between the Great Basin’s mountaintops and valley bottoms ranges from 3,800 feet to 7,600 feet with an average difference of 5,800 feet. The extreme topographic relief of this area greatly affects the distribution of plants and animals and provides niches for a multitude of organisms with diverse habitat requirements.16 The Great Basin is a land of striking contrasts containing considerable biological diversity. The Great Basin ranks as the fourth highest in terms of the number of vascular plant species among 116 ecoregions throughout North America and also ranks very high in the number of species of birds, butterflies