PENNSYLVANIA RESERVOIR REPORT

Last Updated: March 13, 2026

Pennsylvania's reservoirs and dams play a critical role in water conservation, flood control, and recreation. Latest observations indicate that most reservoirs in the state are maintaining water levels close to their average figures for this time of year. For instance, Prompton Reservoir, General Edgar Jadwin Reservoir, and Beltzville Lake near Parryville are all reporting elevations slightly above their average levels, which suggests a stable water management situation. In contrast, Blue Marsh Lake and Indian Rock Dam are showing water levels below their respective averages, possibly indicating a degree of water scarcity or the result of strategic drawdowns for maintenance or ecological considerations.

Particularly, Blue Marsh Lake is almost three feet below its average at an elevation of 285 feet, and Indian Rock Dam is over four feet below its average with an elevation of 371 feet. These deviations from the norm may be attributed to various factors, such as lower than expected snowpack melting or decreased river flows. When cross-referencing with external data sources, we find potential contributing factors. For example, the Hanover Borough has requested water conservation from its customers amid concerns of drought conditions, as reported by The Evening Sun. This may reflect wider hydrological challenges affecting reservoir levels. Meanwhile, seasonal events such as the migration of snow geese reported by the Houston Chronicle suggest natural ecological rhythms are in play, which could also impact water levels indirectly by affecting local water cycles and usage. For anglers and recreationists, understanding reservoir conditions is key; insights from Montana Outdoor on reading dam release schedules offer a perspective on how man-made interventions can impact water bodies. Overall, while many Pennsylvania dams and reservoirs maintain healthy levels, certain areas are experiencing abnormal conditions that warrant close monitoring, and these water bodies may be influenced by both human management and environmental factors.

Pennsylvania has more than 3,000 dams and the majority of them are used for flood control, irrigation and recreational purposes. Some of the major reservoirs in the state are Raystown Lake, Lake Wallenpaupack, and Blue Marsh Lake. These reservoirs are supplied by streams, rivers and creeks such as the Juniata River and the Lackawaxen River. The snowpack in the Pocono Mountains and the Allegheny Mountains contributes to the water supply of these reservoirs. The hydrology in the area is influenced by the Appalachian Mountains and the Atlantic Ocean. The state has experienced record low water levels in some reservoirs during drought conditions. Seasonal trends show that water levels are typically highest in the spring due to snowmelt and lowest in the fall. Overall, these reservoirs play a crucial role in supplying water for the state's agriculture, industries and residents.

Pennsylvania has more than 3,000 dams and the majority of them are used for flood control, irrigation and recreational purposes. Some of the major reservoirs in the state are Raystown Lake, Lake Wallenpaupack, and Blue Marsh Lake. These reservoirs are supplied by streams, rivers and creeks such as the Juniata River and the Lackawaxen River. The snowpack in the Pocono Mountains and the Allegheny Mountains contributes to the water supply of these reservoirs. The hydrology in the area is influenced by the Appalachian Mountains and the Atlantic Ocean. The state has experienced record low water levels in some reservoirs during drought conditions. Seasonal trends show that water levels are typically highest in the spring due to snowmelt and lowest in the fall. Overall, these reservoirs play a crucial role in supplying water for the state's agriculture, industries and residents.