Marina
Beginning September 2, 2025, the U.S. Army Corps of Engineers will initiate a drawdown of Kanopolis Lake—lowering the water level by approximately four feet—to support vital dam outlet work.
The drawdown period extends through the end of September, aiming for the target elevation of 1,461 feet MSL, and sets the stage for construction completion by spring 2026. Here’s a full breakdown of what’s happening, why it matters, and what to expect.
Project Overview
Timeline
- Start Date: September 2, 2025
- Expected Completion of Drawdown: By September 30, 2025
- Construction Finish (Dam Outlet Works): Spring 2026
Lake Level Adjustment
- The lake will be lowered by approximately four feet to reach the target elevation of 1,461 feet MSL.
- This level will be maintained until the outlet reconstruction is complete.
River Impact
- Released water will flow into the Smoky Hill River, with expected discharge not exceeding 500 cubic feet per second (cfs)—a level deemed unlikely to cause significant river level rise.
Purpose and Scope
- The drawdown supports ongoing dam outlet construction, crucial for structural integrity and operational safety.
- The drawdown schedule remains weather-dependent, with potential changes due to local weather conditions.
Facts & Figures
| Aspect | Details |
|---|---|
| Lake | Kanopolis Lake, north-central Kansas |
| Managing Agency | U.S. Army Corps of Engineers, Kansas City District |
| Drawdown Start | September 2, 2025 |
| Drawdown End | By September 30, 2025 |
| Water Level Decrease | About four feet |
| Target Elevation | 1,461 feet MSL |
| River Discharge Cap | ≤ 500 cubic feet per second into Smoky Hill River |
| Construction Purpose | Work on dam outlet works |
| Completion of Construction | Spring 2026 |
| Schedule Flexibility | Subject to local weather conditions |
Why This Matters
- Infrastructure Enhancement: The dam outlet works are vital for maintaining structural functionality, controlling water flow, and preventing excessive pressure or risk during high inflow periods.
- Safety & Environmental Management: By controlling the Smoky Hill River discharge, authorities aim to prevent downstream flooding or ecological disruption—especially important in a rural setting.
- Advance Planning: Informing the public, especially recreational users and nearby communities, ensures preparedness for reduced water levels and potentially altered access throughout this fall.
- Future Resilience: Completion by spring 2026 will enhance the longevity and safety of dam infrastructure for years to come.
Local Impacts & Considerations
- Recreation
- Boating, fishing, and other water-based activities may be limited or affected due to lower water levels. Boat ramps and swimming areas could be temporarily unavailable.
- Wildlife & Ecology
- Drawdown may expose shoreline areas, altering habitat availability and temporarily disrupting wildlife patterns.
- Downstream Communities
- Efficient and gentle release—under 500 cfs—minimizes flood risk, but monitoring remains essential during this transitional period.
- Construction Logistics
- Maintaining the lake at the specified elevation ensures safe and efficient access for workers and equipment to complete the outlet works.
Starting September 2, 2025, the drawdown of Kanopolis Lake by roughly four feet marks a critical phase in maintaining the safety and functionality of its dam’s outlet structure.
With controlled water release, a target elevation of 1,461 feet MSL, and an anticipated completion of construction by spring 2026, the U.S. Army Corps of Engineers is safeguarding both infrastructure and downstream ecosystems.
While recreational and natural environments may be temporarily affected, proactive planning and clear communication help mitigate impact—paving the way for a more resilient dam and lake system.
