The U.S. Geological Survey, in cooperation with the U.S. Air Force Academy (USAFA), carried out bathymetric and topographic surveys to characterize the volume of Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4 at the U.S. Air Force Academy, Colorado.
The study is meant to improve reservoir regulation and operation during periods of drought or high demand so that the lakes and reservoirs can be monitored using stage and volume gages.
This study provides an updated characterization of storage capacity and improved understanding of present
(2019) water capacity in the lakes and reservoirs at the USAFA, which will improve reservoir regulation and operation during periods of drought or high demand so that the lakes and reservoirs can be monitored using stage and volume gages.
In addition, these surveys serve as a baseline that could be compared with future surveys of the lakes and reservoirs.
Bathymetric maps of each lake and reservoir are presented with figures of the elevation-volume curves in the Scientific Investigations Map (Kohn and Hempel (2020)). The bathymetric surveys for this study were carried out from October 15, 2019, to December 12, 2019, using a manually operated, boat-mounted, single-beam echo sounder integrated with a Real-Time Kinematic (RTK) Global Navigation Satellite Systems (GNSS) receiver. Topographic surveys were carried out during the same time period using RTK GNSS to collect elevation data at and above the water surface and up to the elevation of the dam or spillway at the time of the surveys. The topographic and bathymetric datasets were imported into Esri ArcMap 10.7.1. The combined survey points were then interpolated into digital elevation models (DEMs), which were used to determine lake or reservoir volumes that correspond to water-surface elevations between the lakebed and the approximate top of the dam or spillway.
The elevation and volume data at specified elevations for each lake or reservoir and the combined topographic and bathymetric RTK GNSS survey points and bathymetric DEMs are published in Kohn and Hempel (2020).
The data for Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4 are presented in the following formats:
1. Table:
Lake or reservoir | Spillway crest elevation, in U.S. survey feet (NAVD 88) | Spillway crest elevation, in feet (NAVD 88) | Main outlet structure elevation, in U.S. survey feet (NAVD 88) | Main outlet structure elevation, in feet (NAVD 88) | Dam crest elevation, in U.S. survey feet (NAVD 88) | Dam crest elevation, in feet (NAVD 88) | Top of the outlet tower elevation, in U.S. survey feet (NAVD 88) | Top of the outlet tower elevation, in feet (NAVD 88) |
---|---|---|---|---|---|---|---|---|
Deadmans Lake | NA | NA | 7,187.67 | 7,187.68 | 7,190.35 | 7,190.36 | NA | NA |
Golf Course Reservoir 9 | 6,927.61 | 6,927.62 | 6,924.23 | 6,924.24 | 6,929.91 | 6,929.92 | NA | NA |
Ice Lake | 6,373.30 | 6,373.31 | 6,372.14 | 6,372.15 | 6,375.17 | 6,375.18 | NA | NA |
Kettle Lake 1 | 6,457.42 | 6,457.43 | 6,455.59 | 6,455.60 | 6,459.31 | 6,459.32 | NA | NA |
Kettle Lake 2 | NA | NA | 6,474.64 | 6,474.65 | 6,481.05 | 6,481.06 | NA | NA |
Kettle Lake 3 | 6,487.68 | 6,487.69 | 6,485.21 | 6,485.22 | 6,488.09 | 6,488.10 | NA | NA |
Non-Potable Reservoir 1 | 6,573.02a | 6,573.03a | NS | NS | 6,584.79 | 6,584.80 | 6,584.13 | 6,584.14 |
Non-Potable Reservoir 2 | 6,898.45 | 6,898.46 | NS | NS | 6,902.03 | 6,902.04 | 6,904.26 | 6,904.27 |
Non-Potable Reservoir 3 | 6,963.26 | 6,963.27 | NS | NS | 6,968.06 | 6,968.07 | 6,969.16 | 6,969.17 |
Non-Potable Reservoir 4 | 7,201.99b | 7,202.00b | NS | NS | 7,209.74 | 7,209.75 | 7,206.22 | 7,206.23 |
a Two spillways are present at Non-Potable Reservoir 1, so values from the lower spillway, the north spillway, are listed here and the south spillway crest is at an elevation of 6,579.17 U.S. survey feet (6,579.18 feet) above NAVD 88. b The spillway was located on the outlet tower above the main outlet structure and was not a separate channel on the ground adjacent to the reservoir. |
2. Map Sheet - Bathymetric maps of the features.
Bathymetric DEMs (map sheet) were used to determine lake or reservoir volumes that correspond to water-surface elevations between the lakebed and the approximate top of the dam or spillway.
3. FIGURE - Elevation-volume curves
Lake and reservoir volumes were computed at specified elevation ranges using the Surface Volume tool in ArcMap (Esri, 2020) and were compiled into elevation-volume curves
4. TABLE:
Lake or reservoir | Date of survey | Water-surface elevation during bathymetric survey, in U.S. survey feet (NAVD 88) | Water-surface elevation during bathymetric survey, in feet (NAVD 88) | Volume during bathymetric survey, in acre-feet |
---|---|---|---|---|
Deadmans Lake | November 14, 2019 | 7,184.92 | 7,184.93 | 9.24 |
Golf Course Reservoir 9 | October 15, 2019 | 6,920.83 | 6,920.84 | 1.81 |
Ice Lake | October 18, 2019 | 6,369.53 | 6,369.54 | 16.25 |
Kettle Lake 1 | October 15, 2019 | 6,455.70 | 6,455.71 | 18.75 |
Kettle Lake 2 | October 16, 2019 | 6,474.69 | 6,474.70 | 33.91 |
Kettle Lake 3 | October 17, 2019 | 6,485.29 | 6,485.30 | 47.14 |
Non-Potable Reservoir 1 | November 15, 2019 | 6,568.24 | 6,568.25 | 102.36 |
Non-Potable Reservoir 2 | November 12, 2019 | 6,895.64 | 6,895.65 | 309.14 |
Non-Potable Reservoir 3 | November 13, 2019 | 6,958.78 | 6,958.79 | 113.04 |
Non-Potable Reservoir 4 | November 14, 2019 | 7,187.65 | 7,187.66 | 4.50 |
Below are other science projects associated with this project.
Clear Creek Reservoir Bathymetry
Bathymetry of Groundhog and Totten Reservoirs
Survey and Bathymetric Data of Deadmans Lake; Golf Course Reservoir 9; Ice Lake; Kettle Lakes 1-3; and Non-Potable Reservoirs 1-4 at the U.S. Air Force Academy, Colorado, 2019 (ver. 1.1, June 2020)
Below are publications associated with this project.
Methods of practice and guidelines for using survey-grade global navigation satellite systems (GNSS) to establish vertical datum in the United States Geological Survey
Procedural Documentation and Accuracy Assessment of Bathymetric Maps and Area/Capacity Tables for Small Reservoirs
- Overview
The U.S. Geological Survey, in cooperation with the U.S. Air Force Academy (USAFA), carried out bathymetric and topographic surveys to characterize the volume of Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4 at the U.S. Air Force Academy, Colorado.
The study is meant to improve reservoir regulation and operation during periods of drought or high demand so that the lakes and reservoirs can be monitored using stage and volume gages.
This study provides an updated characterization of storage capacity and improved understanding of present
(2019) water capacity in the lakes and reservoirs at the USAFA, which will improve reservoir regulation and operation during periods of drought or high demand so that the lakes and reservoirs can be monitored using stage and volume gages.In addition, these surveys serve as a baseline that could be compared with future surveys of the lakes and reservoirs.
Bathymetric maps of each lake and reservoir are presented with figures of the elevation-volume curves in the Scientific Investigations Map (Kohn and Hempel (2020)). The bathymetric surveys for this study were carried out from October 15, 2019, to December 12, 2019, using a manually operated, boat-mounted, single-beam echo sounder integrated with a Real-Time Kinematic (RTK) Global Navigation Satellite Systems (GNSS) receiver. Topographic surveys were carried out during the same time period using RTK GNSS to collect elevation data at and above the water surface and up to the elevation of the dam or spillway at the time of the surveys. The topographic and bathymetric datasets were imported into Esri ArcMap 10.7.1. The combined survey points were then interpolated into digital elevation models (DEMs), which were used to determine lake or reservoir volumes that correspond to water-surface elevations between the lakebed and the approximate top of the dam or spillway.
The elevation and volume data at specified elevations for each lake or reservoir and the combined topographic and bathymetric RTK GNSS survey points and bathymetric DEMs are published in Kohn and Hempel (2020).
The data for Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4 are presented in the following formats:
1. Table:
Elevation of the spillway crest, main outlet structure, dam crest, and top of outlet tower for Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4, U.S. Air Force Academy, Colorado, 2019. [NAVD 88, North American Vertical Datum of 1988; NA, not applicable because feature did not exist; NS, not surveyed because feature was submerged beneath the water surface and not accessible]
Lake or reservoir Spillway crest elevation, in U.S. survey feet (NAVD 88) Spillway crest elevation, in feet (NAVD 88) Main outlet structure elevation, in U.S. survey feet (NAVD 88) Main outlet structure elevation, in feet (NAVD 88) Dam crest elevation, in U.S. survey feet (NAVD 88) Dam crest elevation, in feet (NAVD 88) Top of the outlet tower elevation, in U.S. survey feet (NAVD 88) Top of the outlet tower elevation, in feet (NAVD 88) Deadmans Lake NA NA 7,187.67 7,187.68 7,190.35 7,190.36 NA NA Golf Course Reservoir 9 6,927.61 6,927.62 6,924.23 6,924.24 6,929.91 6,929.92 NA NA Ice Lake 6,373.30 6,373.31 6,372.14 6,372.15 6,375.17 6,375.18 NA NA Kettle Lake 1 6,457.42 6,457.43 6,455.59 6,455.60 6,459.31 6,459.32 NA NA Kettle Lake 2 NA NA 6,474.64 6,474.65 6,481.05 6,481.06 NA NA Kettle Lake 3 6,487.68 6,487.69 6,485.21 6,485.22 6,488.09 6,488.10 NA NA Non-Potable Reservoir 1 6,573.02a 6,573.03a NS NS 6,584.79 6,584.80 6,584.13 6,584.14 Non-Potable Reservoir 2 6,898.45 6,898.46 NS NS 6,902.03 6,902.04 6,904.26 6,904.27 Non-Potable Reservoir 3 6,963.26 6,963.27 NS NS 6,968.06 6,968.07 6,969.16 6,969.17 Non-Potable Reservoir 4 7,201.99b 7,202.00b NS NS 7,209.74 7,209.75 7,206.22 7,206.23 a Two spillways are present at Non-Potable Reservoir 1, so values from the lower spillway, the north spillway, are listed here and the south spillway crest is at an elevation of 6,579.17 U.S. survey feet (6,579.18 feet) above NAVD 88.
b The spillway was located on the outlet tower above the main outlet structure and was not a separate channel on the ground adjacent to the reservoir.2. Map Sheet - Bathymetric maps of the features.
Bathymetric DEMs (map sheet) were used to determine lake or reservoir volumes that correspond to water-surface elevations between the lakebed and the approximate top of the dam or spillway.
Bathymetric maps of features Bathymetry of Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4 at the U.S. Air Force Academy, Colorado, 2019 3. FIGURE - Elevation-volume curves
Lake and reservoir volumes were computed at specified elevation ranges using the Surface Volume tool in ArcMap (Esri, 2020) and were compiled into elevation-volume curves
Example elevation-volume curve for bathymetry study, Bathymetry of Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4 at the U.S. Air Force Academy, Colorado, 2019 4. TABLE:
Water-surface elevations and volumes of Deadmans Lake, Golf Course Reservoir 9, Ice Lake, Kettle Lakes 1–3, and Non-Potable Reservoirs 1–4, U.S. Air Force Academy, Colorado, during the bathymetric survey, fall 2019.
[NAVD 88, North American Vertical Datum of 1988]Lake or reservoir Date of survey Water-surface elevation during bathymetric survey, in U.S. survey feet (NAVD 88) Water-surface elevation during bathymetric survey, in feet (NAVD 88) Volume during bathymetric survey, in acre-feet Deadmans Lake November 14, 2019 7,184.92 7,184.93 9.24 Golf Course Reservoir 9 October 15, 2019 6,920.83 6,920.84 1.81 Ice Lake October 18, 2019 6,369.53 6,369.54 16.25 Kettle Lake 1 October 15, 2019 6,455.70 6,455.71 18.75 Kettle Lake 2 October 16, 2019 6,474.69 6,474.70 33.91 Kettle Lake 3 October 17, 2019 6,485.29 6,485.30 47.14 Non-Potable Reservoir 1 November 15, 2019 6,568.24 6,568.25 102.36 Non-Potable Reservoir 2 November 12, 2019 6,895.64 6,895.65 309.14 Non-Potable Reservoir 3 November 13, 2019 6,958.78 6,958.79 113.04 Non-Potable Reservoir 4 November 14, 2019 7,187.65 7,187.66 4.50 - Science
Below are other science projects associated with this project.
Clear Creek Reservoir Bathymetry
To better characterize the water supply capacity of Clear Creek Reservoir, Chaffee County, Colorado, the U.S. Geological Survey, in cooperation with the Pueblo Board of Water Works and Colorado Mountain College, carried out a bathymetry survey of Clear Creek Reservoir. The equipment and methods used in this study allowed water-resource managers to maintain typical reservoir operations, eliminating...Bathymetry of Groundhog and Totten Reservoirs
In order to better characterize the water supply capacity of Groundhog Reservoir, Dolores County, Colorado, and Totten Reservoir, Montezuma County, Colorado, the U.S. Geological Survey, in cooperation with the Dolores Water Conservancy District, conducted a bathymetric survey of Groundhog and Totten Reservoir. The study was performed in June 2011 using a man-operated boat-mounted multibeam echo... - Data
Survey and Bathymetric Data of Deadmans Lake; Golf Course Reservoir 9; Ice Lake; Kettle Lakes 1-3; and Non-Potable Reservoirs 1-4 at the U.S. Air Force Academy, Colorado, 2019 (ver. 1.1, June 2020)
The U.S. Geological Survey (USGS), in cooperation with the U.S. Air Force Academy, carried out bathymetry surveys to characterize the water-supply capacity of Deadmans Lake; Golf Course Reservoir 9; Ice Lake; Kettle Lakes 1, 2, and 3; and Non-Potable reservoirs 1, 2, 3, and 4 at the U.S. Air Force Academy, Colorado in 2019. This data release includes: the elevation and volumes at specified elevati - Multimedia
- Publications
Below are publications associated with this project.
Methods of practice and guidelines for using survey-grade global navigation satellite systems (GNSS) to establish vertical datum in the United States Geological Survey
Geodetic surveys have evolved through the years to the use of survey-grade (centimeter level) global positioning to perpetuate and post-process vertical datum. The U.S. Geological Survey (USGS) uses Global Navigation Satellite Systems (GNSS) technology to monitor natural hazards, ensure geospatial control for climate and land use change, and gather data necessary for investigative studies relatedProcedural Documentation and Accuracy Assessment of Bathymetric Maps and Area/Capacity Tables for Small Reservoirs
Because of the increasing use and importance of lakes for water supply to communities, a repeatable and reliable procedure to determine lake bathymetry and capacity is needed. A method to determine the accuracy of the procedure will help ensure proper collection and use of the data and resulting products. It is important to clearly define the intended products and desired accuracy before conductin