Great Falls Reservoir lake and shoreline

Great Falls Reservoir Water Level

Tennessee

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Great Falls Reservoir

Great Falls Reservoir is currently 11.0 feet below full pool, with a water-surface elevation of 794.0 feet.

794.02 ft · Updated 3 hours ago · Tennessee Valley Authority

Current level

794.02ft

−10.98 ft vs full pool

Low

Vs full pool

Since last reading

Down 0.15 ft

Previous readingOct 4794.27 ft

7-day change

Down 0.94 ft

7-day trend: Falling

8 daily readings in the last 7 days

30-day change

Down 4.42 ft

31 daily readings in the last 30 days

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Water Level History

Current
794.02 ft
24h
-0.15 ft
7d
-0.94 ft
30d
-4.42 ft

Elevation (ft) MSL

Reference line is designed full pool.

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Lake Level Context

Level remains below the full pool

Great Falls Reservoir is currently 794.02 ft, 10.98 ft below its full pool. The lake has fallen 0.94 ft over the past 7 days and 4.42 ft over the past 30 days.

Great Falls Reservoir Level Details

Reference elevations, recent daily readings, data sources, and answers to common questions.

Conditions & Reference

Level status

10.98 ft below full pool

Current level
794.02 ft
Full pool
805 ft
DatumVertical reference for published pool and stage elevations at this lake (from the lake catalog).
Not available
Elevation reference
MSL
Source
TVA

Reference levels

  • Full pool805 ft

Watershed drought

Moderate Drought

100% of watershed in official drought (D1+).

Severity

NoneExtreme
Trend
Worsening

Watershed drought conditions

DeKalb County, TN

Moderate Drought

Moderate Drought. Moderate drought is affecting the watershed.. Trend: Worsening compared with last week. Official drought yes

Severity

NoneExtreme

Weekly trend

Worsening

Compared with last week

Official drought

Yes

100% of the watershed is currently classified as official drought (D1+).

Expected impacts

  • Stream inflows may run below normal
  • Lake levels can decline faster between rain events
  • Vegetation stress may increase over time

U.S. Drought Monitor · map date Sep 29, 2026. Updated weekly. droughtmonitor.unl.eduView drought map for DeKalb County, TN

Daily level summary

DateLevelChange
Oct 5, 2026794.12-0.15
Oct 4, 2026794.27-0.14
Oct 3, 2026794.41-0.06
Oct 2, 2026794.47-0.04
Oct 1, 2026794.51-0.19
Sep 30, 2026794.7-0.17
Sep 29, 2026794.87-0.19

Common questions about Great Falls Reservoir’s water level

  • The current water level at Great Falls Reservoir is 794.02 ft (updated 3 hours ago). You can track the Great Falls Reservoir lake level on the interactive chart and daily history above.

  • Full pool for Great Falls Reservoir is 805 ft — the normal conservation target elevation when the reservoir is at its designed summer or operating pool.

  • The current 7-day trend for the Great Falls Reservoir lake level is falling — falling about 0.94 ft over the past week. See the history chart above for the full picture.

  • Based on the latest gauge reading, Great Falls Reservoir is currently 10.98 ft below full pool.

Lake level glossary

Definitions for pool targets, datums, and how elevation readings are labeled.

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