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Deep Creek, Placer County, California, USA
at crossing of State Road 89 south of Truckee.
latitude: 39.1968
longitude: -120.198402
Precision of location: Gauged from chart or map
Site Named Here: By name of site (or city, etc.)
| Polycelis sierrensis | Sep 23, 1967 | water clear, fast current, temperature 10.6 degrees C., pH 7.7, 4 immature post-fission specimens under stones. | ||
| Polycelis sierrensis | Jul 10, 1968 | 3 specimens, 2 of them mature. |