Lake Okabena - Depth Chart

.	Mean (Avg) Depth	Maximum Depth	Length of Shoreline	Lake Surface Area How much Surface space does this lake occupy?	Lake Volume Lake Okabena contains approximately 1.7 Billion gallons of water
Feet	Feet	Miles	Acre Feet¹	Square Feet²	Square Yards³	Acre Feet⁴	Cubic Feet⁵	Cubic yards⁶	Million Gallons⁷
Main Lake	6.9 FT^A.	15.3 FT^A.	4.9 Miles^A.	733.3 AC^A.	31,942,548	1,183,057.3	5,043 AC. FT.	219,673,080	8,136,039.8	1,643.3
Sunset Bay	3.5 FT^A.	5.8 FT^A..	1.8 Miles^A.	38.9 AC^A.	1,694,484	62,758.6	110 AC. FT.	4,791,600	177,466.6	35.8
TOTALS	6.7 Miles	772.2 AC	33,637,032	1,245,816	5,152 AC. FT.	224,464,680	8,313,506.4	1,679.1

^{L E G E N D S & C A L C U L A T I O N S
E X P L A I N E D}
1 cubic yard = 201.974 gallons
1 gallon = .004951 cubic yards
These are estimates based upon the 1999 data. Actual amounts will vary through seasons and different weather patterns

A Source: The data in these columns and cells are from a document prepared for the Nobles County Soil & Conservation District by Houston Engineering of Fargo, ND on 3-15-1999 based upon measurements taken in the 1999 Lake Bottom Study

EXPLANATION OF LAKE SURFACE CALCULATIONS FOR EACH COLUMN ABOVE¹AC FT is a short term for Acre Feet which is one square acre at a depth of one foot
²Square Feet = 43,560 Square feet per 1 AC FT
Therefore 772.2 AC*43,560 Sq Ft = 33,637,032 Sq Ft
³Square Yards = Square Feet/27
Therefore 33,637,032 Sq Ft / 27 Sq Ft = 1,245,816 Square Yards

EXPLANATION OF LAKE VOLUME CALCULATIONS FOR EACH COLUMN ABOVE
⁴Acre Feet in volume terms takes into consideration average depth
   Therefore 733.3 AC FT * 6.9 Ft avg depth = 5,043 AC FT of volume
⁵Cubic Feet = 43,560 per AC FT
   Therefore 5,152 AC FT * 43,560 Sq Ft per AC FT = 224,464,680 Cubic Ft
⁶Cubic Yards = Cubic Feet/27
   Therefore 224,464,680 Cubic Ft/27 = 8,313,506.4 Cubic Yards
⁷Million Gallons = cubic yards * 201.974 gallons per cubic yard
    Therefore 8,313,506.4 cubic yards * 201.974 gallons = 1,679,100,000 gallons