Level of the Lake

Allatoona Lake

Elevation at Allatoona Dam

836.96ft

feet above sea level

3.04 ft below full · down 0.36 ft this week

Drawdown range
updated 12:15 PM EDT

Since midnight

−0.02 ft

level change

Past 30 days

−2.15 ft

level change

Storage

333,400

acre-feet · 91% full

Water temp

78.1°F

below Allatoona Dam

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Allatoona is easing down (−0.36 ft this week). Releases, evaporation and intake are taking out more than the rivers bring in (≈218 cfs). That puts it in the “Drawdown range” range, 13.96 ft above the “Deep drawdown” line.

Past 30 days

−2.03 ft over this window
834.00836.00838.00840.00Aug 29Sep 13Sep 28
Lake elevation, past 30 days, now 837.06 ft, down 2.03 ft over the window
DateElevation (ft)
Aug 29839.09
Aug 30839.11
Aug 31839.09
Sep 1838.98
Sep 2838.88
Sep 3838.76
Sep 4838.62
Sep 5838.50
Sep 6838.43
Sep 7838.40
Sep 8838.33
Sep 9838.21
Sep 10838.07
Sep 11837.94
Sep 12837.93
Sep 13838.02
Sep 14838.04
Sep 15837.96
Sep 16837.85
Sep 17837.73
Sep 18837.60
Sep 19837.51
Sep 20837.50
Sep 21837.44
Sep 22837.29
Sep 23837.25
Sep 24837.21
Sep 25837.18
Sep 26837.16
Sep 27837.13
Sep 28837.06

Daily mean elevation · USGS 02393500 daily means · provisional

Typical for these dates: the middle half of years since 1989 in the lake’s record, median dashed.

The lake in cross-section

Historic high 861.21964Flood pool ~860Summer pool 8401954 record low 809.3836.96 ft

Rivers into the lake

Rivers & rain →

Swipe sideways to follow the river to the lake →

172 cfs3.3 cfs43 cfs175 cfs43 cfs330 cfsout the dam nowEtowah172 cfsShoal Creek3.3 cfsLittle River43 cfsEtowah armEtowah + Shoal CreekLittle River armLittle River91% fullAllatoona storagein 218 · out 330 cfsnet −112 cfs ≈ -0.24 in/day on the lakeEtowah at Allatoona…USGS gauge below the dam
SteadyReceding · high water draining downOn the rise · climbing right nowInbound wave · big rise upstreamFlooding · NWS, by river heightNo current readingRising or falling is judged from each gauge’s last 48 hours, scaled to its river. Dot speed follows the flow. NWS flood status comes from river height and outranks direction.

Streamflow at the 3 USGS gauges, plus the current flow out through the dam (USGS). Labels are gauge readings in cfs. Line width isn’t to scale. The lake’s net is worked out from these gauges (flow in minus flow out), so it misses ungauged creeks, evaporation and withdrawals.

The rivers, gauge by gauge

218cfs combined

79% of the inflow is coming from the Etowah

Gauged rivers only. Runoff below these gauges and ungauged arms aren’t counted. Streamflow: USGS (provisional). Flood status: NOAA/NWS, from river height at each gauge rather than flow.