G. Lytle Reservoir Report
Nearby: A. Mosiman U S A
Last Updated: December 12, 2025
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Summary
Lytle, located in Sully, South Dakota, is a privately owned earth dam completed in 1948 with a height of 16 feet and a length of 650 feet. It has a storage capacity of 154 acre-feet and a maximum discharge of 4200 cubic feet per second. Despite its age, the dam is classified as having a low hazard potential and its condition is currently rated as "Not Rated". The dam is under the regulatory jurisdiction of the South Dakota Department of Environment and Natural Resources (DENR) and is subject to state permitting, inspection, and enforcement.
The primary purpose of G. Lytle dam is not specified, but it serves as a water resource structure in the region. With its location on the TR MISSONot RatedI river or stream, the dam plays a crucial role in regulating water flow and providing water storage for various uses. The dam does not have associated structures or emergency action plans in place, but it meets state regulatory requirements for inspection and enforcement. Additionally, the dam is not owned or funded by any federal agencies, indicating its significance as a privately managed water resource infrastructure.
For water resource and climate enthusiasts, G. Lytle dam presents an interesting case study in privately owned earth dams and their role in water management. The dam's construction in the late 1940s and its continued operation highlight the importance of maintaining aging infrastructure for water supply, flood control, and environmental protection. As climate change impacts water resources across the globe, understanding the regulatory framework and condition assessment of dams like G. Lytle becomes essential for ensuring their resilience and sustainability in the face of evolving climate challenges.
Year Completed |
1948 |
Dam Length |
650 |
Dam Height |
16 |
River Or Stream |
TR MISSONot RatedI |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
154 |
Hazard Potential |
Low |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
G. Lytle