Synoptic sampling data from upper Cement Creek near Gladstone, Colorado, October 2012, September 2019, and September 2020

Dates

Publication Date: 2022-10-28
Start Date: 2012-10-03
End Date: 2020-09-19

Citation

Runkel, R.L., Petach, T.N., Cowie, R.M., Bowen, I., McCleskey, R.B., Dyment, S., Rock, N., and Qi, S.L., 2022, Synoptic sampling data from upper Cement Creek near Gladstone, Colorado, October 2012, September 2019, and September 2020: U.S. Geological Survey data release, https://doi.org/10.5066/P9QO264O.

Summary

Three synoptic sampling campaigns were conducted on upper Cement Creek, near Gladstone, Colorado, under low-flow conditions. The first campaign, conducted October 2012, was part of a larger campaign to characterize low-flow water quality in the entire Cement Creek watershed. The second campaign, conducted in September 2019, was designed to quantify metal loading and identify sources of contamination along a 2.5-kilometer study reach. The third campaign, conducted in September 2020, was designed to quantify loads and sources along the same 2.5-kilometer study reach during a test closure of a bulkhead on the Red and Bonita Mine, one of the primary sources of metals within the watershed. Streamflow measurements during the 2012 campaign [...]

Summary

Three synoptic sampling campaigns were conducted on upper Cement Creek, near Gladstone, Colorado, under low-flow conditions. The first campaign, conducted October 2012, was part of a larger campaign to characterize low-flow water quality in the entire Cement Creek watershed. The second campaign, conducted in September 2019, was designed to quantify metal loading and identify sources of contamination along a 2.5-kilometer study reach. The third campaign, conducted in September 2020, was designed to quantify loads and sources along the same 2.5-kilometer study reach during a test closure of a bulkhead on the Red and Bonita Mine, one of the primary sources of metals within the watershed. Streamflow measurements during the 2012 campaign were conducted using Acoustic Doppler Velocimetry. A continuous, instream injection of a sodium bromide tracer was initiated at the head of the study reach two days prior to the 2019 synoptic sampling campaign and maintained throughout the duration of the campaign. Bromide concentrations were subsequently used to determine streamflow using the tracer-dilution method. Streamflow estimates for the 2020 campaign were developed using a series of sodium chloride slug additions, wherein specific conductivity readings were used as a surrogate for chloride concentration. This data release includes concentration data (inorganic cations and anions), estimated streamflow, and calculated loads for the three sampling campaigns. Tracer data for the continuous tracer injection (2019) and slug additions (2020) are also included. Calculated loads may be used to compare low flow conditions with and without contributions from the Gold King Mine (2012 versus 2019) as well as before and after closure of the Red and Bonita bulkhead (2019 versus 2020).

The data release consists of a kmz file showing site locations and the following 9 tables:

Table 1, Locations of sampling sites
Table 2, Synoptic sampling results, October 3, 2012
Table 3, Synoptic sampling results, September 5, 2019
Table 4, Synoptic sampling results, September 19, 2020
Table 5, Iron speciation results, September 7, 2019
Table 6, Bromide timeseries, September 3-5, 2019
Table 7, Slug addition chloride data, September 19, 2020
Table 8, Slug addition results, September 19, 2020
Table 9, Spatial profiles of streamflow and metal load

Contacts

Point of Contact :: Robert L Runkel
Originator :: Robert L Runkel, Tanya Petach, Rory M Cowie, Ian Bowen, R Blaine McCleskey, Stephen Dyment, Nate Rock, Sharon L Qi
Metadata Contact :: Sharon L Qi
Publisher :: U.S. Geological Survey
Distributor :: U.S. Geological Survey - ScienceBase
SDC Data Owner :: Colorado Water Science Center
USGS Mission Area :: Ecosystems

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Cement_Synoptic_FGDC_Metadata.xml Original FGDC Metadata	View	137.51 KB	application/fgdc+xml
Site Locations.kmz		2.89 KB	application/vnd.google-earth.kmz
IMG_5063.png “Confluence of Cement Creek (L) and inflow from the Red and Bonita mine (R).”		6.7 MB	image/png
table1_sites.csv		53.01 KB	text/csv
table2_synoptic_results_2012.csv		4.74 KB	text/csv
table3_synoptic_results_2019.csv		13.72 KB	text/csv
table4_synoptic_results_2020.csv		5.56 KB	text/csv
table5_Fe_speciation_2019.csv		508 Bytes	text/csv
table6_bromide_timeseries_2019.csv		6.56 KB	text/csv
table7_slug_chloride.csv		62.66 KB	text/csv
table8_slug_results.csv		494 Bytes	text/csv
table9_streamflow_and_loads.csv		10.58 KB	text/csv

Purpose

These data were collected by the U.S. Geological Survey (USGS) in cooperation with U.S. Environmental Protection Agency. Additional support was provided by the USGS Toxic Substances Hydrology Program (Ecosystems Mission Area). These data are used to quantify metal loads in upper Cement Creek near Gladstone, Colorado.

Synoptic sampling data from upper Cement Creek near Gladstone, Colorado, October 2012, September 2019, and September 2020

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