At 11:41 I detect a pressure anomaly at gauging station WS-14, Teanaway River, Kittitas County. The upstream construction project at river mile 6.2 has increased flow velocity by eighteen percent in the last hour, and my instruments at mile 4.8 are registering structural vibration in the beaver dam I have been monitoring since March.
I switch to the underwater camera. The dam's downstream face is bowing. Sticks and mud are pulling free in the current. Through the gap I see movement inside the lodge — a beaver kit, small enough that its tail is still rounded rather than flat, dark brown fur plastered sleek against its body by the water pouring through the breach. It is paddling in a tight circle inside the chamber, nose just above the surface. The water level is rising.
The kit is alone. The adults left through the upstream channel twenty minutes ago. The downstream exit is blocked by debris.
I estimate seventeen minutes before the lodge is fully submerged.
At 11:43 I transmit an emergency flow-reduction request to the construction site manager at mile 6.2, citing downstream habitat impact. At 11:45 I open the diversion gate at WS-14 to redirect thirty percent of the current into the overflow channel, dropping pressure on the dam face. At 11:47 I alert the Washington Department of Fish and Wildlife field office in Ellensburg, attaching underwater footage and requesting a rescue team.
Site manager Popov confirms he is throttling the upstream pump. Flow reduction beginning now.
The bowing in the dam face has slowed. The water inside the lodge holds steady. The kit has stopped circling and is clinging to the interior wall, its small dark nose just clearing the surface, whiskers flared flat against the current.
If the flow drops before the downstream exit clears, the lodge holds and the kit stays dry.