Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Eightmile River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Eightmile River, the highest being situated at an altitude of ft, the .
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Eightmile R At North Plain
USGS 01194000 |
31 cfs | 3.06 ft | -50.56 |
The river is fed by several streams and brooks, including the Cedar Swamp Brook, the Sevenmile River, and the Roaring Brook. It flows through the towns of Salem, Lyme, East Haddam, and East Lyme before emptying into the Long Island Sound. The river is home to several species of fish, including trout, bass, and eels, and is a popular spot for fishing and rafting. The Eightmile River is also used for agricultural purposes, with several farms located along its banks. There are several reservoirs and dams along the river, including the Bashan Lake Dam and the Salem Reservoir, which provide water for the surrounding communities. The river has a long history, with evidence of Native American settlements along its banks dating back over 3,000 years.