Real-Time Kinematic Global Navigation Satellite Systems (GNSS) surveying equipment near Non-Potable Reservoir 1
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
Completed
By Colorado Water Science Center
November 19, 2020
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.
Media
Sources/Usage: Public Domain. View Media Details
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
Media
Sources/Usage: Public Domain. View Media Details
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 |
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Below are multimedia items associated with this project.
GNSS Surveying Equipment near Non-Potable Reservoir 1
Real-Time Kinematic Global Navigation Satellite Systems (GNSS) surveying equipment near Non-Potable Reservoir 1
Ice Lake at dusk, looking north from the main outlet structure
Ice Lake at dusk, looking north from the main outlet structure
Ice Lake at dusk, looking north from the main outlet structure
Bathymetric surveying equipment at Non-Potable Reservoir 2
Research vessel with bathymetric surveying equipment Non-Potable Reservoir 2
Research vessel with bathymetric surveying equipment Non-Potable Reservoir 2
Research vessel on Kettle Lake 3
Research vessel with bathymetric surveying equipment andU.S. Geological Survey hydrologist on Kettle Lake 3.
Research vessel with bathymetric surveying equipment andU.S. Geological Survey hydrologist on Kettle Lake 3.
Looking southwest from the north side of Kettle Lake 2
Looking southwest from the north side of Kettle Lake 2
Looking southwest from the north side of Kettle Lake 2
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.
Media
Sources/Usage: Public Domain. View Media Details
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
Media
Sources/Usage: Public Domain. View Media Details
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
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...
Below are multimedia items associated with this project.
GNSS Surveying Equipment near Non-Potable Reservoir 1
Real-Time Kinematic Global Navigation Satellite Systems (GNSS) surveying equipment near Non-Potable Reservoir 1
Real-Time Kinematic Global Navigation Satellite Systems (GNSS) surveying equipment near Non-Potable Reservoir 1
Ice Lake at dusk, looking north from the main outlet structure
Ice Lake at dusk, looking north from the main outlet structure
Ice Lake at dusk, looking north from the main outlet structure
Bathymetric surveying equipment at Non-Potable Reservoir 2
Research vessel with bathymetric surveying equipment Non-Potable Reservoir 2
Research vessel with bathymetric surveying equipment Non-Potable Reservoir 2
Research vessel on Kettle Lake 3
Research vessel with bathymetric surveying equipment andU.S. Geological Survey hydrologist on Kettle Lake 3.
Research vessel with bathymetric surveying equipment andU.S. Geological Survey hydrologist on Kettle Lake 3.
Looking southwest from the north side of Kettle Lake 2
Looking southwest from the north side of Kettle Lake 2
Looking southwest from the north side of Kettle Lake 2