Dye Concentration at Station FL6 Downstream of Lock and Dam 14 near Pleasant Valley, Iowa (June 2017)

Metadata Updated: December 11, 2019

These data were collected in support of a multi-agency effort to evaluate the feasibility of using carbon dioxide to create a barrier and prevent upstream passage of invasive fish through navigational locks. The auxiliary lock at Lock and Dam 14 on the Mississippi River near Pleasant Valley, Iowa, was chosen for a field-scale trial of the carbon dioxide barrier to be conducted in 2018. In preparation for this trial, the mixing in the lock chamber during routine operations and the fate and transport of lock water released to the pool downstream was studied using a dye tracer. In June 2017, the U.S. Geological Survey (USGS) performed two injections of Rhodamine WT dye into the auxiliary lock chamber as the lock was filled. The dye was injected directly into the fill water at the upstream valves on both sides of the lock. The first injection of 0.82 liters of Rhodamine WT (0.41 liters per intake) occurred at 9:50 am on June 13, 2017. The second injection of 0.25 liters of Rhodamine WT (0.125 liters per intake) occurred at 12:11 pm on June 13, 2017. Both injections started approximately 1 minute after filling of the lock began and the injections took approximately 2 minutes to complete. The total time to fill the auxiliary lock in both cases was 6 minutes. All times are in Central Daylight Time (CDT). The distribution of dye within the lock chamber and downstream of the lock was measured using eight Turner Designs C3 submersible fluorometers (1 in vertical profiling mode in the lock chamber, 6 at fixed locations downstream of the lock, and 1 mounted on a mobile survey vessel). This data release is comprised of a time series of dye concentration at a fixed location downstream of the auxiliary lock chamber at Lock and Dam 14 on the Mississippi River near Pleasant Valley, Iowa, on June 13, 2017 and June 14, 2017. The measurements were obtained using a Turner Designs C3 submersible fluorormeter (SN 2300295) deployed at a fixed depth below the water surface. All parameters (dye concentration, turbidity, and temperature) were sampled at 5-second intervals.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Date November 17, 2017
Metadata Created Date October 10, 2019
Metadata Updated Date December 11, 2019
Reference Date(s) January 1, 2017 (publication)
Frequency Of Update notPlanned
Frequency Of Update notPlanned

Metadata Source

Harvested from DOI CKAN Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date November 17, 2017
Metadata Created Date October 10, 2019
Metadata Updated Date December 11, 2019
Reference Date(s) January 1, 2017 (publication)
Responsible Party U.S. Geological Survey (Point of Contact)
Contact Email
Access Constraints Use Constraints: none, Access Constraints: none
Bbox East Long -90.404447000004
Bbox North Lat 41.574733
Bbox South Lat 41.547192
Bbox West Long -90.440590999998
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id 081357e5-00bd-4ca7-9265-a9b95814e2d1
Harvest Source Id 34ce571b-cb98-4e0b-979f-30f9ecc452c5
Harvest Source Title DOI CKAN Harvest Source
Licence Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner whenever applicable. The data have been approved for release and publication by the U.S. Geological Survey (USGS). Although the data have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, the data are released on the condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from authorized or unauthorized use. Although the data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Users of the data are advised to read all metadata and associated documentation thoroughly to understand appropriate use and data limitations.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester true
Temporal Extent Begin 2017-06-13
Temporal Extent End 2017-06-14

Didn't find what you're looking for? Suggest a dataset here.