Reservoir & dam operations
Lake level, inflow & outflow
Turbidity trend
Recent federal and published field readings, shown together for timing and movement.
USGS reports FNU while field samples report NTU; the instruments and scales differ, so compare the timing and shape of the lines rather than their values one-for-one.
Big Cliff pool
Big Cliff's own small re-regulating pool, not shown on the public chart above.
Source: USACE Big Cliff hourly report. Updates once per hour with a short reporting lag — treat as operational reference, not a substitute for SCADA.
USGS federal gauges
Field testing stations
| # | Station | Water temperature | pH | Conductivity | Turbidity | Sampled |
|---|---|---|---|---|---|---|
| #1 | Detroit Lake Boat Ramp (Mongold) Detroit Lake State Park · Reservoir | NA | NA | 45.7 µS/cm | 255 NTU | Oct 16, 2026 |
| #2 | Detroit Dam Tailrace Below Detroit Dam | NA | NA | 48.8 µS/cm | 0.641 NTU | Oct 16, 2026 |
| #3 | Big Cliff Tailrace Below Big Cliff Dam | NA | NA | 48.6 µS/cm | 0.709 NTU | Oct 16, 2026 |
| #4 | Fishermen's Bend Boat Launch Near Mill City | NA | NA | 48.5 µS/cm | 0.802 NTU | Oct 16, 2026 |
Federal gauge readings and field testing results shown here are reported without commentary; gauges auto-refresh every 10 minutes. Federal readings are provisional data from the USGS National Water Information System and are subject to revision. Field testing results are published independently by the N. Santiam Silt Project.