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Old 02-22-2013, 05:41 AM
Impact-Vector Impact-Vector is offline
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5ft retaining wall around a detention pond

This one has me scratching my head.

Was planning on using a block wall system with a fortune of geogrid.

Allenblock doesn't seem to like the idea of a concrete footing (I was thinking of a 4ft deep footing)

Any thoughts? Most engineers are not willing to explore the idea. I'm reluctant to suggest a change to poured concrete.

Thnx
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Old 02-22-2013, 07:53 AM
clipfert clipfert is offline
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Originally Posted by Impact-Vector View Post
This one has me scratching my head.

Was planning on using a block wall system with a fortune of geogrid.

Allenblock doesn't seem to like the idea of a concrete footing (I was thinking of a 4ft deep footing)

Any thoughts? Most engineers are not willing to explore the idea. I'm reluctant to suggest a change to poured concrete.

Thnx
Get an engineer
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Old 02-22-2013, 08:43 AM
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DVS Hardscaper DVS Hardscaper is offline
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Nbr one, they are RETENTION PONDS, not "detention pond".

Nbr two. This entails an engineer.
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Old 02-22-2013, 08:48 AM
clipfert clipfert is offline
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Is this at Gitmo? Then it could be a detention pond.
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Old 02-22-2013, 08:59 AM
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alldayrj alldayrj is online now
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I can't see how a fortune of grid plus block can be cheaper than concrete
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Old 02-22-2013, 10:00 AM
PSUhardscaper PSUhardscaper is offline
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Originally Posted by DVS Hardscaper View Post
Nbr one, they are RETENTION PONDS, not "detention pond".

Nbr two. This entails an engineer.
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Detention ponds and retention ponds are not the same.

http://www.lccdnet.org/wp-content/up...1/04/Ponds.pdf
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Old 02-22-2013, 10:17 AM
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DVS Hardscaper DVS Hardscaper is offline
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Detention ponds and retention ponds are not the same.

http://www.lccdnet.org/wp-content/up...1/04/Ponds.pdf
The point I'm trying to make is that nearly all ponds are engineered, whether no wall or wall.

So when erecting a wall for such, it must be engineered. For the wall's stability and for the function of the pond.
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Old 02-22-2013, 11:07 AM
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jbailey52 jbailey52 is offline
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Quote:
Originally Posted by DVS Hardscaper View Post
Nbr one, they are RETENTION PONDS, not "detention pond".

The point I'm trying to make is that nearly all ponds are engineered, whether no wall or wall.


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I think the point you were trying to make, is pointing out he used an incorrect term... which you do not yet know.
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Old 02-22-2013, 12:04 PM
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DVS Hardscaper DVS Hardscaper is offline
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Originally Posted by jbailey52 View Post
I think the point you were trying to make, is pointing out he used an incorrect term... which you do not yet know.
LOL - thats how it appears!

Ponds are engineered. They're not just cavities excavated with pipes discharging into them..........
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Old 02-22-2013, 03:41 PM
JMMack JMMack is offline
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actually....most of the stormwater structures being designed/built now (at least in md and pa) are considered to be "BIO-retention Areas" they are supposed to address water quality issues prior to the storm water being detained. most of our designs now combine the use of surface treatment (bio-retention) and then subsurface (detention) systems, with some variations depending on the site

all of this came about when certain states adopted "new" (now old, 2006 I think) NPDES regulations

btw, a lot of the systems (regardless of who designed them) are failing miserably by creating stagnant standing water mosquito breeding grounds. we have been cited by the "west nile cops" who work in the same organization (govt) as the people who review the bio ret systems....go figure

sorry for the long rant
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