Question: What Geologically classified as a "massive sulfide ore deposit", uses an earthfill dam on Spring Creek primarily to collect severe acid mine drainage stemming?

full_context: Document 1: New Almaden: The New Almaden quicksilver mine in the Capitancillas range in Santa Clara County, California, United States, is the oldest and most productive quicksilver (i.e., mercury) mine in the U.S. The site was known to the indigenous Ohlone for its cinnabar long before a Mexican settler became aware of the ores in 1820. By the time they were identified as mercury, the mine was perfectly timed to supply the California Gold Rush. The mine ran intermittently after 1927 and eventually closed. It was purchased by the county and is now part of Almaden Quicksilver County Park.
Document 2: Spring Creek Dam (New South Wales): Spring Creek Dam is a minor embankment dam across the Spring Creek upstream of Orange in the central western region of New South Wales, Australia. The impounded reservoir is called the Spring Creek Reservoir.
Document 3: Tar Creek Superfund site: Tar Creek Superfund site is a United States Superfund site, declared 1983, located in the cities of Picher and Cardin, Northeastern Oklahoma. From 1900 to the 1960’s lead mining  and zinc mining companies left open Chat piles behind until the present day. The dust has blown around the city containing these metals, cadmium, and others. The metals have also seeped into groundwater, ponds, and lakes, many of which still are used by children for swimming. Elevated lead, zinc and manganese levels in Picher children have led to learning disabilities and other problems. The EPA declared Picher to be one of the most toxic areas in the United States.
Document 4: Spring Creek Dam: Spring Creek Debris Dam is an earthfill dam on Spring Creek, a tributary of the Sacramento River, in Shasta County in the U.S. state of California. Completed in 1963, the dam, maintained by the U.S. Bureau of Reclamation, serves primarily to collect severe acid mine drainage stemming from the Iron Mountain Mine. The dam forms the Spring Creek Reservoir, less than 1 mi long. Spring Creek and South Fork Spring Creek flow into the reservoir from a 16 sqmi watershed. The dam is directly upstream from the city of Keswick, California and the Keswick Reservoir.
Document 5: Iron Range: Iron Range refers collectively or individually to a number of elongated iron-ore mining districts around Lake Superior in the United States and Canada. Despite the word "range," the iron ranges are not mountain chains, but outcrops of Precambrian sedimentary formations containing high percentages of iron. These cherty iron ore deposits are Precambrian in age for the Vermilion Range, while middle Precambrian in age for the Mesabi and Cuyuna Ranges, all in Minnesota. Similarly, the Gogebic Range in Wisconsin and the Marquette Iron Range and Menominee Range in Michigan. Natural ores and concentrates were produced from 1848 until the mid 1950s, when taconites and jaspers were concentrated and pelletized started to become the major source of iron production.
Document 6: Koppers Co., Inc. (KCI) Superfund Site: The Koppers Co., Inc. (KCI) Superfund Site is one of three Superfund sites in Oroville, California, along with Louisiana Pacific Sawmill and Western Pacific Railyard. The KCI Superfund Site is a 200-acre site which served as a wood treatment plant for 50 years. Wood was treated with many chemicals to prevent wood deterioration. The accumulation of these chemicals from spills, fires, and uses has caused this site to be contaminated with hazardous waste material. Due to soil and groundwater contamination, the site was placed on the National Priorities List in 1984 for remedial action plans to clean up the site to protect surrounding residential areas concerning environmental and human health risks.
Document 7: Copperfields Mine: Copperfields Mine, originally known as Temagami Mine, is an abandoned copper and silver mine on Temagami Island in Lake Temagami, Ontario, Canada. The mine opened in 1955 and comprises both underground and surface workings within a sulfide ore body. Situated in Phyllis Township, the mine produced 34,000,000 dollars Canadian with 80 million pounds of copper, 230,028 ounces of silver and 13,271 ounces of gold. It was considered to be the largest deposit of nearly pure chalcopyrite ever discovered in Canada. A mill was not initially needed because the ore was 28% copper. The mine closed in 1972 and is now flooded by water. Ruins of the Copperfields mill are present as foundations. It is possible to find mineral specimens in the spoil heaps of the old mine, such as chalcopyrite, pyrite, bornite, malachite, dolomite, hessite, merenskyite, millerite, palladium, quartz and others. The Lake Temagami Access Road was created to ship ore from the mine site.
Document 8: Camp Far West Reservoir: Camp Far West Reservoir (also known as Camp Far West Lake) is a small reservoir in the foothills of Northern California located approximately 8 miles east of Wheatland, California and 45 miles northeast of Sacramento. The lake also forms the meeting point of three California counties, Placer, Nevada and Yuba Bear River and Rock Creek, near what was formerly the confluence of the two streams. The dam was constructed in 1963 as part of the California State Water Project to control flooding in the Central Valley (California), and to provide hydroelectric power to the surrounding area. The facility is owned and operated by the South Sutter Water District.
Document 9: Bruno Creek Tailings Impoundment: The Bruno Creek Tailings Impoundment is a tailings dam on Bruno Creek, 19 mi southwest of Challis in Custer County, Idaho. It serves to store tailings for the nearby Thompson Creek Mine. At 550 ft tall, it is the second tallest center-line tailings dam in the world. In 2008, Phase 8 of the mine was approved which includes a raising of the dam to 750 ft . The dam is mainly composed of cycloned sand. Currently, the dam stores 100000000 MT of tailings and the raise would increase storage to 125000000 MT . The downstream slope of the dam will be steepened from 3:1 to 2.75:1. In 1994, it was discovered that acid mine drainage had been forming on the embankment since 1987. Since seepage does occur at the dam, a system of wells was installed to monitor groundwater and a seepage return dam was constructed downstream.
Document 10: Spring Creek Reservoir (California): The Spring Creek Reservoir is the artificial lake created by the construction of the Spring Creek Dam across Spring Creek in the Shasta-Trinity National Forest of Shasta County, California, adjacent to Keswick.
Document 11: Iron Mountain Mine: Iron Mountain Mine, also known as the Richmond Mine at Iron Mountain, is a mine near Redding in Northern California, US. Geologically classified as a "massive sulfide ore deposit", the site was mined for iron, silver, gold, copper, zinc and pyrite intermittently from the 1860s until 1963. The mine is the source of extremely acidic mine drainage which also contains large amounts of zinc, copper and cadmium. One of America's most toxic waste sites, it has been listed as a federal Superfund site since 1983.
Document 12: Lake Clementine: Lake Clementine (also known as North Fork Lake) is a reservoir on the North Fork American River Canyon above the picturesque gold rush era town of Auburn (elev. 1200') in northern California. It was created in 1939 when the North Fork Dam, a 155 ft tall variable radius arch dam, was completed by the Army Corps of Engineers for the purpose of containing gold mining debris washing downriver. It is open to boat traffic, a waterskiing and wakeboarding spot during the summer. However, many days the lake is closed to wakeboarding so that the lake may be quietly enjoyed for kayaks, rowing, and fishing. It features steep forested canyon walls and contains several large high quality limestone deposits, one large vertical outcropping of which is known as Robbers Roost, and offers climbing and caving opportunities for the adventurous. A popular hiking, running, and mountain biking trail courses from the dam area, continues downstream below the 780' high Foresthill Bridge, linking Lake Clementine to the North and Middle Forks American River Confluence area below the dam. The trail also connects to a large-network of hiking, running, and mountain biking trail systems stretching eastward into the Sierra Nevada mountain range near Lake Tahoe. Because the dam is designed so that the river flows over its top, a waterfall is created that grows impressively large in winter and spring when rain and snowmelt cause high river flows.
Document 13: Deer Creek Dam and Reservoir: The Deer Creek Dam and Reservoir hydroelectric facilities are on the Provo River in western Wasatch County, about 16 mi northeast of Provo, Utah. The dam is a zoned earthfill structure 235 ft high with a crest length of 1304 ft . The dam contains 2,810,000 cubic yards (2,150,000 m³) of material and forms a reservoir of 152,570 acre.foot capacity. Construction began in May 1938 and was completed in 1941. The reservoir supplies water for agricultural, municipal and industrial use. Recreational activities on and around the reservoir include boating, fishing, camping, swimming and water skiing.
Document 14: Shasta Dam: Shasta Dam (called Kennett Dam before its construction) is a concrete arch-gravity dam across the Sacramento River in Northern California in the United States. At 602 ft high, it is the eighth-tallest dam in the United States. Located at the north end of the Sacramento Valley, Shasta Dam creates Shasta Lake for long-term water storage, flood control, hydroelectricity and protection against the intrusion of saline water. The largest reservoir in the state, Shasta Lake can hold about 4500000 acre-ft .
Document 15: Leviathan Mine: Leviathan Mine is a United States superfund site (CERCLIS ID: CAD98067685) at an abandoned open-pit sulfur mine located in Alpine County, California. The mine is located at on the eastern slope of the Sierra Nevada at about 7,000 ft elevation, 6 mi east of Markleeville and 24 mi southeast of Lake Tahoe. The mine site comprises approximately 250 acre of land surrounded by the Toiyabe National Forest, which is only accessible a few months a year. The approximately 22 million tons of sulfur ore-containing crushed rock at the mine are responsible for contaminating the Leviathan and Aspen Creek, which join with Mountaineer Creek to form Bryant Creek which ultimately empties into the East Fork of the Carson River. These water bodies are listed as 303(d) impaired. The site location is seismically active.
ground_truth: Iron Mountain Mine