current Water conditions IN roswell, above ga-400 bridge

 

Shell Level 1² Level 2² Level 3²
Singles 3,000 6,000 8,000
Doubles³ 3,000 6,000 8,000
Quads³ 5,000⁴ 6,000 8,000
Fours 5,000⁴ 8,000 10,000
Eights 5,000⁴ 8,000 10,000

¹For Coached Programs, these criteria serve as guidelines and coaches retain full discretion to determine safe rowing conditions for their programs, taking into account crew experience and fitness, weather and water conditions, and shell size.
²Indicated level means that AT LEAST HALF of the rowers in a shell meet the Safety & Skills Level requirement.
³In doubles and quads the rower with the highest Safety & Skills Checkout Level MUST bow.
⁴Allowed ONLY under coached supervision (there are no Level 1 Quads, Fours, or Eights in the ARC fleet).

flow Rate above Roswell Rd

This river flow rate is measured upriver of the Roswell Rd. bridge above the Big Creek inlet.

 

USGS Water-data graph for site 02335450

water depth above ga-400 bridge

This river gauge height is measured upriver of the GA-400 bridge near Old Riverside Rd.

We recently added this graph and are watching water levels to determine how the gauge height above Roswell correlates to our ability to row. If you have any observations, please let us know!

USGS Water-data graph for site 02335450

Morgan Falls Dam

(Current Conditions)

Water level Safety

Gauge Height Condition
866 ft
GOOD ROWING
Full river
865
ROWABLE
4+/x, 8+ watch for sand bars
864
ROWABLE
4+/x, 8+ use caution
863
PROBABLY NOT ROWABLE
Shallow water & high sandbars
862
DEFINITELY NOT ROWABLE
USGS Water-data graph for site 02335810

Wind Speed Safety

Wind Speed Condition
0 - 3 mph
GREAT ROWING
4 - 7
ROWABLE
Small chop may occur
Novice exercise caution
8 - 11
MAY BE ROWABLE
White caps probably forming
Experience rowers use caution
12 - 14
PROBABLY NOT ROWABLE
White caps and difficulty steering
Large boats use caution
15+
DEFINITELY NOT ROWABLE
USGS Water-data graph for site 02335810

Wind Direction Safety

Wind Direction Condition
0 degrees
NORTH
GOOD ROWING
90
EAST
MAY NOT BE ROWABLE
Strong winds may cause white caps along E-to-W spans of the river
180
SOUTH
ROWABLE
Strong winds may cause chop along N-S spans of the river, but areas are generally protected
270
WEST
GOOD ROWING
USGS Water-data graph for site 02335810

MORGAN FALLS Dam (DOWNSTREAM release)

The discharge rate at Morgan Falls Dam determines how quickly our section of the Chattahoochee is draining. If the discharge rate is greater than the rate of inflows from Buford Dam and other tributaries then the river depth will decrease. If the discharge is less than the rate of inflows then the depth will increase.

Release rates affect river depth within the hour and also affect water speed, but to a lesser degree.

USGS Water-data graph for site 02334430

Water Speed Forecasts

BIG CREEK (TRIBUTARY)

The Big Creek site discharges into the Chattahoochee River just upstream of the Roswell Rd. bridge.

This site provides an indication of rainfall affect that is additive to the releases at Buford Dam.

USGS Water-data graph for site 02335757

Norcross (3 hours)

The Norcross site discharge rate will affect the rowing venue about 3 hours after leaving Norcross.

This site provides an indication of rainfall affect in addition to the Buford Dam releases.

USGS Water-data graph for site 02335000

Buford Dam (12 hours)

The Buford Dam discharge rate usually varies between 600 cu.ft./sec and 5,000 to 10,000.

It will affect the rowing venue about 12 hours after it leaves Buford Dam.

USGS Water-data graph for site 02334430

Water Quality

Generally the E. coli count is higher for heavy flows, especially after heavy rains (an E.coli count above 235 is regarded as potentially unsafe).

The Chattahoochee Riverkeepers track E. coli and other data for several river locations listed alphabetically at http://www.chattahoochee.org/nww/. The ARC team’s 3 testing locations are listed at this page as Big Creek at Riverside Park, Chattahoochee River at Roswell Road and Willeo Creek at Willeo Road.
The NPS data and estimates for Medlock Bridge and Paces Ferry are here.