Wind
Humidity
Lemolo No 1 is a captivating hydroelectric dam located in Idleyld Park, Oregon, along the picturesque North Umpqua River.
Built in 1955 by Pioneer Service & Engineering, this rockfill dam stands at an impressive height of 120 feet and boasts a storage capacity of 19,000 acre-feet. With a primary purpose of generating hydroelectric power, the dam also provides opportunities for recreational activities in its vicinity.
Managed by the Federal Energy Regulatory Commission, Lemolo No 1 is a vital infrastructure for water resource and climate enthusiasts. The dam's controlled spillway, with a width of 100 feet, ensures the safe release of excess water during high flow events. With a hazard potential rated as high and a risk assessment indicating a very high risk level, the dam is closely monitored and inspected to ensure public safety and environmental protection.
Despite its age, Lemolo No 1 continues to play a crucial role in water management and renewable energy production in Douglas County, Oregon. Its strategic location, impressive height, and significant storage capacity make it a key player in the region's water resource infrastructure. For enthusiasts interested in water management and climate resilience, Lemolo No 1 is a fascinating example of engineering ingenuity and environmental stewardship.
Year Completed |
1955 |
Dam Length |
885 |
Dam Height |
120 |
River Or Stream |
North Umpqua River |
Primary Dam Type |
Rockfill |
Surface Area |
419.1 |
Hydraulic Height |
109 |
Drainage Area |
175 |
Nid Storage |
19000 |
Structural Height |
120 |
Outlet Gates |
Tainter (radial) - 1 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
120 |
Lemolo Lake To Oregon Cacades Recreation Area Boundary
Oregon Cascades Recreation Area Boundary To Mt. Thielsen Wilderness Boundary
Mt. Thielsen Wilderness Boundary To Maidu Lake
Lower Timpanogas Lake To Confluence With Echo Creek
Headwaters To Boulder Creek Wilderness Boundary
Headwaters To Rogue-Umpqua Wilderness Boundary