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?

Context articles: Tetapaga Lake
Seafloor massive sulfide deposits
Iron Mountain Mine
Operation Scarlift
Volcanogenic massive sulfide ore deposit
Supergene (geology)
La Zarza mine
Bruno Creek Tailings Impoundment
Spring Creek Dam
Mahanoy Creek

Tetapaga Lake, also known as Lake Tetapaga, is a narrow east-west trending lake in the Temagami region of Northeastern Ontario, Canada, located at the abandoned iron-bearing Sherman Mine.
 A gravel road crosses the central portion of the lake, splitting it into two small lakes.
 The eastern half of Tetapaga Lake is somewhat green in colour due to acid mine drainage water flowing into the lake.
 The acid mine drainage water results from water seeping through the abandoned iron ore of Sherman Mine along its eastern shore.
 Its western half is relatively uninfected where very little waste from Sherman Mine exists.
Seafloor massive sulfide deposits or SMS deposits, are modern equivalents of ancient volcanogenic massive sulfide ore deposits or VMS deposits.
 The term has been coined by mineral explorers to differentiate the modern deposit from the ancient.
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.
Operation Scarlift (also known as Project 500 or The Bond Issue Program) was a program carried out by the Pennsylvania government in the 1960s and 1970s.
 Its mission was to repair environmental damage caused by abandoned mine lands, acid mine drainage, and other issues associated with historic mining.
 The operation began around the time that the Land and Water Conservation and Reclamation Act was passed and became inactive in the 1970s due to a lack of funding.
 During the operation, a total of $141,000,000 was spent on a variety of tasks, including remedying pollution in hundreds of streams, extinguishing dozens of mine fires, and constructing acid mine drainage treatment plants.
 Numerous reports on mining-impacted streams were produced during the operation, many of which continue to be used for assessing watersheds.
Volcanogenic massive sulfide ore deposits, also known as VMS ore deposits, are a type of metal sulfide ore deposit, mainly copper-zinc which are associated with and created by volcanic-associated hydrothermal events in submarine environments.
In ore deposit geology, supergene processes or enrichment are those that occur relatively near the surface as opposed to deep hypogene processes.
 Supergene processes include the predominance of meteoric water circulation with concomitant oxidation and chemical weathering.
 The descending meteoric waters oxidize the primary (hypogene) sulfide ore minerals and redistribute the metallic ore elements.
 Supergene "enrichment" occurs at the base of the oxidized portion of an ore deposit.
 Metals that have been leached from the oxidized ore are carried downward by percolating groundwater, and react with hypogene sulfides at the supergene-hypogene boundary.
 The reaction produces secondary sulfides with metal contents higher than those of the primary ore.
 This is particularly noted in copper ore deposits where the copper sulfide minerals chalcocite CuS, covellite CuS, digenite CuS, and djurleite CuS are deposited by the descending surface waters.
La Zarza mine is an abandoned mine near the town of La Zarza, Huelva, Andalucia, Spain.
 The deposit is part of the Spanish part of the Iberian Pyrite Belt The orebody is 2,900 meters long and up to 100 meters thick.Like most of the volcanogenic massive sulfide ore deposit in the IPB it contains significant amounts of copper, zinc, lead, silver and gold.
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.
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.
Mahanoy Creek is a 51.6 mi tributary of the Susquehanna River in Northumberland and Schuylkill counties, Pennsylvania.
 There are at least 35 sources of acid mine drainage in the creek's watershed.
 Anthracite was mined in the upper part of the Mahanoy Creek watershed in the 19th and 20th centuries.
 Mahanoy Creek's tributaries include Schwaben Creek, Zerbe Run, Little Mahanoy Creek, Shenandoah Creek, and North Mahanoy Creek.
 Little Mahanoy Creek and Schwaben Creek are two streams in the watershed that are unaffected by acid mine drainage.
 Schwaben Creek has a higher number and diversity of fish species than the main stem.