# How to Determine the Gallons in a Lagoon

• To determine total gallons of water in a lagoon you first need to find 4 measurements:

(1) width of top of water,
(2) length of top of water,
(3) water depth, and
(4) slope of bank.

• To determine the slope of the bank; you use two tape measures and determine how much of a run is required to make a one foot drop.   Most banks are 3:1 or three feet run for every foot drop.

TOW = Top of Water
BOW = Bottom of Water
AOW = Average of Water

Accurate Total Gallons = Average Square feet of Lagoon x Water Depth x 7.5

Top of Water Square Feet (TOWsf.) = TOW. of length x TOW of width

Bottom of Water Square Foot (BOW sf.) = (TOW length – total run) x (TOW width – total run)

Average Square Foot of Lagoon (AOWsf) = (TOWsf + BOWsf ) / 2

Total Run is determined from slope of bank.  See example as follows:

Run of 3:1 slope = depth of water x 3 foot run for every foot drop x 2 banks

Run of 4:1 slope = depth of water x 4 foot run for every foot drop x 2 banks

Example:

Measurements = 300 length of top of water; 200 width of top of water; 15 water depth; 3:1 slope

Run =   3 x 15 x 2   =   90 feet

TOWsf =   300 x 200   =   60,000 sf

BOWsf =   (300-90) x (200-90)   =   210 x 110   =   23,100 sf

AOWsf =   (TOWsf + BOWsf) / 2   =   (60,000 + 23,100) / 2  =  83,100 / 2   =   41,500 sf

Gallons in Lagoon = 41,500 (AOW) x 15 (depth of lagoon) x 7.5 (gallons per ft3) = 4,668,750 gallons

Lagoon Pumping & Dredging, Inc.

For information, quotes and sales: Call the representative for your area:

North East: NE, SD, IA, N-MO, NE-KS: (402) 270-1366 (Brian Jakub)

South West: W-TX, NM, W-OK, CO, WY, MT, W-KS: (763) 355-4099  (Steve Larson)

South East: E-TX, E-OK, S-MO, SE-KS, LA, MS, AR (405) 406-7979 (Jason Lee)

Main Office: (402) 563-3464   (Accounting, Emergencies, Management)

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Lagoon Pumping &

Dredging, Inc.
3211 East 19th St.

Suite 200

Columbus, NE 68601

For Information,
Quotes and Sales:
Call the representative for your area:

North Eastern Sales:

NE, SD, IA, N-MO, NE-KS

Brian Jakub

(402) 270-1366 - Cell

South Western Sales:

W-TX and TX Panhandle, NM, OK Panhandle, CO, MT, WY, W-KS

Steve Larson

(763) 355-4099 - Cell

(806) 683-5553 - 2nd Cell

South Eastern Sales

E-TX, E-OK, LA, MS, AR, S-MO, SE-KS

Jason Lee

(405) 406-7979 - Cell

Office Phone:

(Accounting, Emergencies, Upper Management)

402-563-3464

Fax: 402-564-1696

Email: info@LagoonPumping.com

PumpingDredging@Yahoo.com