Katie Walton-Day
Katie is a Research Hydrologist with the USGS Colorado Water Science Center.
Katie is a research hydrologist and has worked at the U.S. Geological Survey located in Denver, Colorado for over 35 years. During this time her research has primarily focused on understanding the sources and mobility of trace metals associated with hard rock and uranium mineral deposits primarily in the western United States. A primary goal of her research is to provide science-based information to facilitate decisions about remediation in areas affected by historic mining practices. Recently she has begun developing communication products to broaden the audience for USGS scientific studies related to mining and reclamation. Finally, her research has expanded into understanding the effects of harmful algal blooms in Colorado Reservoirs.
Professional Experience
1981-1983 – Exploration Geochemist, Anaconda Minerals Company
1983-1991 – Physical Scientist, U.S. Geological Survey
1991-1996 – Hydrologist, U.S. Geological Survey
1996-Present – Research Hydrologist, U.S. Geological Survey
Education and Certifications
PhD. Geology Colorado School of Mines, 1991
MS Geology Colorado School of Mines, 1985
BA Geology Smith College, 1981
Science and Products
Filter Total Items: 16
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Filter Total Items: 72
Quantification of mass loading to Strawberry Creek near the Gilt Edge mine, Lawrence County, South Dakota, June 2003 Quantification of mass loading to Strawberry Creek near the Gilt Edge mine, Lawrence County, South Dakota, June 2003
Although remedial actions have taken place at the Gilt Edge mine in the Black Hills of South Dakota, questions remain about a possible hydrologic connection along shear zones between some of the pit lakes at the mine site and Strawberry Creek. Spatially detailed chemical sampling of stream and inflow sites occurred during low-flow conditions in June 2003 as part of a mass-loading study...
Authors
Briant A. Kimball, Robert L. Runkel, Katherine Walton-Day, Joyce E. Williamson
Mass loading of selected major and trace elements in Lake Fork Creek near Leadville, Colorado, September-October 2001 Mass loading of selected major and trace elements in Lake Fork Creek near Leadville, Colorado, September-October 2001
A mass-loading study of Lake Fork Creek of the Arkansas River between Sugarloaf Dam and the mouth was completed in September-October 2001 to help ascertain the following: (1) variation of pH and aqueous constituent concentrations (calcium, sulfate, alkalinity, aluminum, cadmium, copper, iron, manganese, lead, and zinc) and their relation to toxicity standards along the study reach; (2)...
Authors
Katherine Walton-Day, Jennifer L. Flynn, Briant A. Kimball, Robert L. Runkel
Geochemistry of Red Mountain Creek, Colorado, under low-flow conditions, August 2002 Geochemistry of Red Mountain Creek, Colorado, under low-flow conditions, August 2002
Red Mountain Creek, an acid mine drainage stream in southwestern Colorado, was the subject of a synoptic study conducted in August 2002. During the synoptic study, a solution containing lithium chloride was injected continuously to allow for the calculation of streamflow using the tracer-dilution method. Synoptic water-quality samples were collected from 48 stream sites and 29 inflow...
Authors
Robert L. Runkel, Briant A. Kimball, Katherine Walton-Day, Philip L. Verplanck
Evaluation of metal loading to streams near Creede, Colorado, August and September 2000 Evaluation of metal loading to streams near Creede, Colorado, August and September 2000
Decisions about remediation of mine drainage on the watershed scale require an understanding of metal contributions from all sources to be able to choose the best sites for remediation. A hydrologic framework to study metal loading in the Willow Creek watershed, a tributary to the Rio Grande River, was established by conducting a series of tracer-injection studies. Each study used the...
Authors
B. A. Kimball, R.L. Runkel, K. Walton-Day, B.K. Stover
Use of an intact core and stable-metal isotopes to examine leaching characteristics of a fluvial tailings deposit Use of an intact core and stable-metal isotopes to examine leaching characteristics of a fluvial tailings deposit
The upper Arkansas River south of Leadville, Colorado, USA, contains deposits of fluvial tailings from historical mining operations in the Leadville area. These deposits are possible non-point sources of acid and metal contamination to surface- and ground-water systems. We used stable-metal isotopes to help ascertain metal retention and release mechanisms that influence metal transport...
Authors
James F. Ranville, Kathleen S. Smith, Paul J. Lamothe, Brian P. Jackson, Katherine Walton-Day
Use of field-scale experiments and reactive transport modeling to evaluate remediation alternatives in streams affected by acid mine drainage Use of field-scale experiments and reactive transport modeling to evaluate remediation alternatives in streams affected by acid mine drainage
No abstract available.
Authors
B. A. Kimball, R.L. Runkel, Katherine Walton-Day
Geochemistry of active and passive treatment processes used to treat mine drainage Geochemistry of active and passive treatment processes used to treat mine drainage
No abstract available.
Authors
Katherine Walton-Day
Assessment of metal loads in watersheds affected by acid mine drainage by using tracer injection and synoptic sampling: Cement Creek, Colorado, USA Assessment of metal loads in watersheds affected by acid mine drainage by using tracer injection and synoptic sampling: Cement Creek, Colorado, USA
Watersheds in mineralized zones may contain many mines, each of which can contribute to acidity and the metal load of a stream. In this study the authors delineate hydrogeologic characteristics determining the transport of metals from the watershed to the stream in the watershed of Cement Creek, Colorado. Combining the injection of a chemical tracer, to determine a discharge, with...
Authors
B. A. Kimball, R.L. Runkel, K. Walton-Day, K.E. Bencala
Effects of acidic recharge on groundwater at the St. Kevin Gulch site, Leadville, Colorado Effects of acidic recharge on groundwater at the St. Kevin Gulch site, Leadville, Colorado
The acid rock drainage-affected stream of St. Kevin Gulch recharges the Quaternary sand and gravel aquifer of Tennessee Park, near Leadville, Colorado, lowering pH and contributing iron, cadmium, copper, zinc and sulphate to the ground-water system. Dissolved metal mobility is controlled by the seasonal spring runoff as well as oxidation/reduction (redox) reactions in the aquifer...
Authors
S.S. Paschke, W.J. Harrison, K. Walton-Day
Effects of fluvial tailings deposits on soils and surface- and ground-water quality, and implications for remediation — Upper Arkansas River, Colorado, 1992–96 Effects of fluvial tailings deposits on soils and surface- and ground-water quality, and implications for remediation — Upper Arkansas River, Colorado, 1992–96
No abstract available.
Authors
Katherine Walton-Day, F. J. Rossi, L. J. Gerner, J. B. Evans, T. J. Yager, J. F. Ranville, K. S. Smith
The interaction of natural organic matter with iron in a wetland (Tennessee Park, Colorado) receiving acid mine drainage The interaction of natural organic matter with iron in a wetland (Tennessee Park, Colorado) receiving acid mine drainage
Pore water from a wetland receiving acid mine drainage was studied for its iron and natural organic matter (NOM) geochemistry on three different sampling dates during summer 1994. Samples were obtained using a new sampling technique that is based on screened pipes of varying length (several centimeters), into which dialysis vessels can be placed and that can be screwed together to allow...
Authors
Stefan Peiffer, Katherine Walton-Day, Donald L. Macalady
U.S. Geological Survey Toxic Substances Hydrology Program: Proceedings of the technical meeting, Charleston, South Carolina, March 8-12, 1999: Volume 1 (Part A) U.S. Geological Survey Toxic Substances Hydrology Program: Proceedings of the technical meeting, Charleston, South Carolina, March 8-12, 1999: Volume 1 (Part A)
This report contains papers presented at the seventh Technical Meeting of the U.S. Geological Survey (USGS), Toxic Substances Hydrology (Toxics) Program. The meeting was held March 8-12, 1999, in Charleston, South Carolina. Toxics Program Technical Meetings are held periodically to provide a forum for presentation and discussion of results of recent research activities. The objectives of...
Non-USGS Publications**
Day, K.W., 1986, Determination of processes controlling vertical trace element distribution in Filson Creek bog, Lake County, Minnesota: Golden, Colorado School of Mines, M.S. thesis # 3149, 236 p.
Walton-Day, Katherine, 1991, Hydrology and geochemistry of a natural wetland affected by acid mine drainage, St. Kevin Gulch, Lake County, Colorado: Golden, Colorado School of Mines, Ph.D. dissertation # 4033, 299 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 16
No Result Found
Filter Total Items: 72
Quantification of mass loading to Strawberry Creek near the Gilt Edge mine, Lawrence County, South Dakota, June 2003 Quantification of mass loading to Strawberry Creek near the Gilt Edge mine, Lawrence County, South Dakota, June 2003
Although remedial actions have taken place at the Gilt Edge mine in the Black Hills of South Dakota, questions remain about a possible hydrologic connection along shear zones between some of the pit lakes at the mine site and Strawberry Creek. Spatially detailed chemical sampling of stream and inflow sites occurred during low-flow conditions in June 2003 as part of a mass-loading study...
Authors
Briant A. Kimball, Robert L. Runkel, Katherine Walton-Day, Joyce E. Williamson
Mass loading of selected major and trace elements in Lake Fork Creek near Leadville, Colorado, September-October 2001 Mass loading of selected major and trace elements in Lake Fork Creek near Leadville, Colorado, September-October 2001
A mass-loading study of Lake Fork Creek of the Arkansas River between Sugarloaf Dam and the mouth was completed in September-October 2001 to help ascertain the following: (1) variation of pH and aqueous constituent concentrations (calcium, sulfate, alkalinity, aluminum, cadmium, copper, iron, manganese, lead, and zinc) and their relation to toxicity standards along the study reach; (2)...
Authors
Katherine Walton-Day, Jennifer L. Flynn, Briant A. Kimball, Robert L. Runkel
Geochemistry of Red Mountain Creek, Colorado, under low-flow conditions, August 2002 Geochemistry of Red Mountain Creek, Colorado, under low-flow conditions, August 2002
Red Mountain Creek, an acid mine drainage stream in southwestern Colorado, was the subject of a synoptic study conducted in August 2002. During the synoptic study, a solution containing lithium chloride was injected continuously to allow for the calculation of streamflow using the tracer-dilution method. Synoptic water-quality samples were collected from 48 stream sites and 29 inflow...
Authors
Robert L. Runkel, Briant A. Kimball, Katherine Walton-Day, Philip L. Verplanck
Evaluation of metal loading to streams near Creede, Colorado, August and September 2000 Evaluation of metal loading to streams near Creede, Colorado, August and September 2000
Decisions about remediation of mine drainage on the watershed scale require an understanding of metal contributions from all sources to be able to choose the best sites for remediation. A hydrologic framework to study metal loading in the Willow Creek watershed, a tributary to the Rio Grande River, was established by conducting a series of tracer-injection studies. Each study used the...
Authors
B. A. Kimball, R.L. Runkel, K. Walton-Day, B.K. Stover
Use of an intact core and stable-metal isotopes to examine leaching characteristics of a fluvial tailings deposit Use of an intact core and stable-metal isotopes to examine leaching characteristics of a fluvial tailings deposit
The upper Arkansas River south of Leadville, Colorado, USA, contains deposits of fluvial tailings from historical mining operations in the Leadville area. These deposits are possible non-point sources of acid and metal contamination to surface- and ground-water systems. We used stable-metal isotopes to help ascertain metal retention and release mechanisms that influence metal transport...
Authors
James F. Ranville, Kathleen S. Smith, Paul J. Lamothe, Brian P. Jackson, Katherine Walton-Day
Use of field-scale experiments and reactive transport modeling to evaluate remediation alternatives in streams affected by acid mine drainage Use of field-scale experiments and reactive transport modeling to evaluate remediation alternatives in streams affected by acid mine drainage
No abstract available.
Authors
B. A. Kimball, R.L. Runkel, Katherine Walton-Day
Geochemistry of active and passive treatment processes used to treat mine drainage Geochemistry of active and passive treatment processes used to treat mine drainage
No abstract available.
Authors
Katherine Walton-Day
Assessment of metal loads in watersheds affected by acid mine drainage by using tracer injection and synoptic sampling: Cement Creek, Colorado, USA Assessment of metal loads in watersheds affected by acid mine drainage by using tracer injection and synoptic sampling: Cement Creek, Colorado, USA
Watersheds in mineralized zones may contain many mines, each of which can contribute to acidity and the metal load of a stream. In this study the authors delineate hydrogeologic characteristics determining the transport of metals from the watershed to the stream in the watershed of Cement Creek, Colorado. Combining the injection of a chemical tracer, to determine a discharge, with...
Authors
B. A. Kimball, R.L. Runkel, K. Walton-Day, K.E. Bencala
Effects of acidic recharge on groundwater at the St. Kevin Gulch site, Leadville, Colorado Effects of acidic recharge on groundwater at the St. Kevin Gulch site, Leadville, Colorado
The acid rock drainage-affected stream of St. Kevin Gulch recharges the Quaternary sand and gravel aquifer of Tennessee Park, near Leadville, Colorado, lowering pH and contributing iron, cadmium, copper, zinc and sulphate to the ground-water system. Dissolved metal mobility is controlled by the seasonal spring runoff as well as oxidation/reduction (redox) reactions in the aquifer...
Authors
S.S. Paschke, W.J. Harrison, K. Walton-Day
Effects of fluvial tailings deposits on soils and surface- and ground-water quality, and implications for remediation — Upper Arkansas River, Colorado, 1992–96 Effects of fluvial tailings deposits on soils and surface- and ground-water quality, and implications for remediation — Upper Arkansas River, Colorado, 1992–96
No abstract available.
Authors
Katherine Walton-Day, F. J. Rossi, L. J. Gerner, J. B. Evans, T. J. Yager, J. F. Ranville, K. S. Smith
The interaction of natural organic matter with iron in a wetland (Tennessee Park, Colorado) receiving acid mine drainage The interaction of natural organic matter with iron in a wetland (Tennessee Park, Colorado) receiving acid mine drainage
Pore water from a wetland receiving acid mine drainage was studied for its iron and natural organic matter (NOM) geochemistry on three different sampling dates during summer 1994. Samples were obtained using a new sampling technique that is based on screened pipes of varying length (several centimeters), into which dialysis vessels can be placed and that can be screwed together to allow...
Authors
Stefan Peiffer, Katherine Walton-Day, Donald L. Macalady
U.S. Geological Survey Toxic Substances Hydrology Program: Proceedings of the technical meeting, Charleston, South Carolina, March 8-12, 1999: Volume 1 (Part A) U.S. Geological Survey Toxic Substances Hydrology Program: Proceedings of the technical meeting, Charleston, South Carolina, March 8-12, 1999: Volume 1 (Part A)
This report contains papers presented at the seventh Technical Meeting of the U.S. Geological Survey (USGS), Toxic Substances Hydrology (Toxics) Program. The meeting was held March 8-12, 1999, in Charleston, South Carolina. Toxics Program Technical Meetings are held periodically to provide a forum for presentation and discussion of results of recent research activities. The objectives of...
Non-USGS Publications**
Day, K.W., 1986, Determination of processes controlling vertical trace element distribution in Filson Creek bog, Lake County, Minnesota: Golden, Colorado School of Mines, M.S. thesis # 3149, 236 p.
Walton-Day, Katherine, 1991, Hydrology and geochemistry of a natural wetland affected by acid mine drainage, St. Kevin Gulch, Lake County, Colorado: Golden, Colorado School of Mines, Ph.D. dissertation # 4033, 299 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.