Sewell Mill Creek at GA 120, near Marietta water level

Name: Sewell Mill Creek at GA 120, near Marietta water level (U.S. Geological Survey)
Creator: U.S. Geological Survey
License: https://www.usgs.gov/information-policies-and-instructions/copyrights-and-credits

River gauge, Sewell Mill Creek, Georgia, United States

Directions

Low for late October

Water level

1.06ft Steady over the last 24 hours

Measured Oct 21, 2026, 05:15 AM EDT (1 hour ago)

Flow: 4.8 cfs

History

7 days 30 days 1 year Years compared

20252026

Water level Normal range (10–90 %) Minor flood stage

What this means

Sewell Mill Creek at GA 120, near Marietta is running below normal at 1.06 ft.

That puts it 0.30 ft below the median of 1.36 ft for late October, based on 19 years of readings. It is 9.94 ft below the flood stage of 11.00 ft. A year ago it stood at 1.01 ft (+0.05 ft).

The level has held steady over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. In the last month it has stayed between 1.00 ft and 1.73 ft.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that.

Compared with 19 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date: 1.36 ft0.30 ft below the median for this date
Normal for this date: 1.06 ft – 1.67 ft8 years in 10 fall in this range (19 years of records)
Same day last year: 1.01 ft+0.05 ft
Lowest and highest in 30 days: 1.00 ft – 1.73 ft
Lowest and highest in 12 months: 1.00 ft – 2.33 ft
Highest on record: 13.26 ftSeptember 21, 2009

Floating and fishing near Sewell Mill Creek at GA 120, near Marietta

Low water exposes gravel bars that make good wading access, but some boat ramps may be left high and dry.

Flood stage here is 11.00 ft, 9.94 ft above the current reading. Beyond it, the National Weather Service also defines moderate and major flood stages.

What happens at each level

14.00 ft: Minor flooding continues to expand further into the residential yards and woodlands upstream and downstream from the gage on Roswell Road. The water will be from 3 to 6 feet deep in the East Cobb Park on the right bank of the creek. A portion of Robinson Road over the creek by Robinson Farms Drive will be flooded with at least 3 feet of water. The athletic field next to the creek off Robinson Road will be flooded with several feet of water.
13.00 ft: Minor flooding continues to expand further into the residential yards and woodlands upstream and downstream from the gage on Roswell Road. The water will be from 2 to 5 feet deep in the East Cobb Park on the right bank of the creek. A portion of Robinson Road over the creek by Robinson Farms Drive will be flooded with at least 2 feet of water. The athletic field next to the creek off Robinson Road will be flooded with several feet of water.
12.00 ft: Minor flooding continues of the residential yards and woodlands upstream and downstream from the gage on Roswell Road. The water will be from 1 to 4 feet deep in the East Cobb Park on the right bank of the creek. The portion of Robinson Road over the creek and by Robinson Farms Drive will be flooded with at least one foot of water. The athletic field next to the creek off Robinson Road will be flooded with a few feet of water.
11.00 ft: Flood stage is reached. Minor flooding of residential yards and woodlands occurs upstream and downstream from the gage on Roswell Road. The water will be up to three feet deep in the lower portions of East Cobb Park on the right bank of the creek. The water level will begin to hit the Robinson Road bridge. The athletic field next to the creek off Robinson Road will begin to flood.
9.00 ft: Bankfull conditions are reached upstream and downstream from the gage on Roswell Road. Water begins to flow into low areas of East Cobb Park on the right bank of the creek.
1.06 ft: Right now

Impact statements from the U.S. National Weather Service.

Highest crests on record

Rank	Level	Date
1	13.26 ft	September 21, 2009
2	12.21 ft	July 12, 2012
3	11.32 ft	September 8, 2021

Weather at the gauge

No rain in the last 3 days.

21 Wed 74° 46° – Wind 7 mph

22 Thu 77° 48° – Wind 7 mph

23 Fri 75° 56° – Wind 9 mph

24 Sat 72° 54° – Wind 11 mph

25 Sun 72° 53° – Wind 12 mph

26 Mon 73° 53° – Wind 8 mph

27 Tue 73° 56° – Wind 5 mph

Forecast: Open-Meteo

Sunrise 07:48 AM Sunset 06:58 PM Daylight 11 hr, 10 min Waxing gibbous 76%

Map

Nearby gauges

Gauge	Level	Compared with normal	24 hours	Distance
Sope Creek near MariettaRiver gauge, Sope Creek	0.95 ft	Low	+0.03 ft	1.8 mi
Willeo Creek at GA 120, near RoswellRiver gauge, Willeo Creek	0.87 ft	Normal	±0	3.7 mi
Chattahoochee River below Morgan Falls DamRiver gauge, Chattahoochee River	811.30 ft	Low	+0.01 ft	4.0 mi
Chattahoochee River at Morgan Falls DamReservoir, Chattahoochee River	863.86 ft	Very low	−0.10 ft	4.0 mi
Chatt River at Powers Fy and I-285 near AtlantaRiver gauge, Chatt River	3.63 ft	Low	±0	5.3 mi
Rottenwood Creek at Interstate N Pkwy, near SmyrnaRiver gauge, Rottenwood Creek	2.17 ft	Normal	+0.03 ft	5.9 mi
Big Creek below Hog Wallow Creek at RoswellRiver gauge, Big Creek	2.40 ft	Normal	±0	6 mi
Noonday Creek Us Chastain Meadows Pkwy, MariettaRiver gauge	2.08 ft	Normal	±0	6 mi

Questions and answers

How does Sewell Mill Creek at GA 120, near Marietta compare with last year?

It is 0.05 ft higher than on the same day last year, when the reading was 1.01 ft.

What is flood stage for Sewell Mill Creek at GA 120, near Marietta?

The official flood stage is 11.00 ft. The level is currently 9.94 ft below it.

What is a normal level for Sewell Mill Creek at GA 120, near Marietta in late October?

The median for late October is 1.36 ft. In 8 years out of 10 the reading falls between 1.06 ft and 1.67 ft, based on 19 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of Sewell Mill Creek at GA 120, near Marietta today?

On Oct 21, 2026, 05:15 AM EDT, the water level was 1.06 ft. Steady over the last 24 hours.

Is Sewell Mill Creek at GA 120, near Marietta rising or falling?

Steady over the last 24 hours. Steady over the last 7 days.

Is the level of Sewell Mill Creek at GA 120, near Marietta normal?

Low for late October. Compared with 19 years of daily readings for this time of year.

For specialists

Station codes, datum, parameters, data quality and downloads

Operator: U.S. Geological Survey
Station code: usgs:023358685 (Agency page)
Coordinates: 33.97903, -84.45203 (WGS84)
Vertical datum: NAVD88
Update interval: every 15 minutes
Licence: Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

Parameter	Last value	Time (UTC)	Quality
Water level	1.06 ft	2026-10-21 09:15	Provisional
Flow	4.8 cfs	2026-10-21 09:15	Provisional

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How to cite

U.S. Geological Survey: Sewell Mill Creek at GA 120, near Marietta (usgs:023358685). Accessed October 21, 2026 via Nivelmap, https://nivelmap.com/en/united-states/georgia/sewell-mill-creek-at-ga-120-near-marietta

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer