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Started By
Message
HELP RE: Pond Overflow Diameter
Posted on 3/25/16 at 6:19 pm
Posted on 3/25/16 at 6:19 pm
What size overflow pipe should I use.
Overflow will be installed at red line. Not the ideal location but already have that area of the damn opened up due to washout.
Pond is ~1.6 acres.
[/URL][/img]
Overflow will be installed at red line. Not the ideal location but already have that area of the damn opened up due to washout.
Pond is ~1.6 acres.
[/URL][/img]This post was edited on 3/25/16 at 6:22 pm
12
Posted on 3/25/16 at 6:24 pm to CroTigerXIII
Tree fiddy inches
Posted on 3/25/16 at 6:24 pm to Hu_Flung_Pu
Sounds perfect 
Posted on 3/25/16 at 6:33 pm to CroTigerXIII
24" just in case and a hell of a lot easier to clean out
Posted on 3/25/16 at 6:34 pm to Itismemc
We just got rid of 12" and 18" so much happier now
Posted on 3/25/16 at 6:48 pm to CroTigerXIII
Our neighbors ponds drainage pipe is a 6 inch pipe.
He has no problems.
He has no problems.
This post was edited on 3/25/16 at 6:49 pm
Posted on 3/25/16 at 6:56 pm to Team Alpha Beast
Appreciate the input.
Posted on 3/25/16 at 7:36 pm to CroTigerXIII
Mine is 875ish by 175ish. 10 or 12 inch overflow.
It has overflowed one time in the last 20 years.
It has overflowed one time in the last 20 years.
Posted on 3/25/16 at 7:43 pm to CroTigerXIII
Posted on 3/25/16 at 7:47 pm to CroTigerXIII
Our overflow/siphon drain is an 8" system for one surface acre pond
Posted on 3/25/16 at 7:51 pm to Bow08tie
I have 6" for just under an acre for 24 years no problems
Posted on 3/25/16 at 8:01 pm to CroTigerXIII
Is it sloped heavily going into the pond, or is it really gradual over a long area?
Posted on 3/25/16 at 8:14 pm to Hammertime
quote:
Is it sloped heavily going into the pond, or is it really gradual over a long area?
No...pond side slope is much less than the backside of the damn. Nice easy slope, much easier than the backside of the damn. I don't know exact slope but I can comfortably ride an ATV on the pond side of the damn when the water is low.
Posted on 3/25/16 at 9:10 pm to CroTigerXIII
How large is the watershed draining to the pond? The size of the pond really doesn't matter, as it is going to be almost full most of the time most likely. What you have to figure out is if you get a 6" rain, is 6" of rain on 2 acres draining to the pond (and overflow) or is 6" of rain on 15 acres draining that way? That's gonna determine if you need a small pipe, big pipe, or a big arse mother frickin pipe.
Posted on 3/25/16 at 9:21 pm to tenfoe
Also how much higher is your levy from your water level.
Posted on 3/25/16 at 9:22 pm to CroTigerXIII
Q=CiA
Flow=impervious factor * rainfall intensity * drainage area
Depends on how bad of a storm and as mentioned how much area drains to your pond
18" should prolly do it though...
Flow=impervious factor * rainfall intensity * drainage area
Depends on how bad of a storm and as mentioned how much area drains to your pond
18" should prolly do it though...
Posted on 3/25/16 at 9:25 pm to CroTigerXIII
We put a 24" pipe in ours with a gate valve so we can fill our duck hunting area in the wintertime. We have about 120 acres of watershed so we also put in a concrete emergency spillway.
In this picture you can see the handle for the gate valve.
In this picture you can see the handle for the gate valve.
Posted on 3/25/16 at 9:35 pm to CroTigerXIII
Damn good wisdom up in here gents.
Posted on 3/25/16 at 10:15 pm to CroTigerXIII
quote:
How large is the watershed draining to the pond?
I'd say watershed is about 10-15 acres. Watershed is split and enters pond from the northeast and northwest corners of the pond (top right and top left in the pic).
quote:
Also how much higher is your levy from your water level.
Our ideal water level is about 24 inches from the top of the levee.
Posted on 3/25/16 at 10:18 pm to CroTigerXIII
Our pond at camp is about 1 acre and we use a 6" pipe. It flows fine but probably should be larger diameter because with heavy rain fall the water seeps around the dam and even when it doesnt the flow pipe spills for several days putting lots of pressure on a dam that is visited and ravaged by beavers often
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