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5ft retaining wall around a detention pond

Discussion in 'Hardscaping' started by Impact-Vector, Feb 22, 2013.

  1. Impact-Vector

    Impact-Vector LawnSite Member
    Messages: 150

    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.

  2. clipfert

    clipfert LawnSite Member
    Messages: 204

    Get an engineer
    Posted via Mobile Device
  3. DVS Hardscaper

    DVS Hardscaper LawnSite Fanatic
    Messages: 6,602

    Nbr one, they are RETENTION PONDS, not "detention pond".

    Nbr two. This entails an engineer.
    Posted via Mobile Device
  4. clipfert

    clipfert LawnSite Member
    Messages: 204

    Is this at Gitmo? Then it could be a detention pond.
  5. alldayrj

    alldayrj LawnSite Gold Member
    Messages: 3,793

    I can't see how a fortune of grid plus block can be cheaper than concrete
    Posted via Mobile Device
  6. PSUhardscaper

    PSUhardscaper LawnSite Member
    Messages: 80

  7. DVS Hardscaper

    DVS Hardscaper LawnSite Fanatic
    Messages: 6,602

    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.
  8. jbailey52

    jbailey52 LawnSite Bronze Member
    Messages: 1,094

    I think the point you were trying to make, is pointing out he used an incorrect term... which you do not yet know.
  9. DVS Hardscaper

    DVS Hardscaper LawnSite Fanatic
    Messages: 6,602

    LOL - thats how it appears!

    Ponds are engineered. They're not just cavities excavated with pipes discharging into them..........
  10. JMMack

    JMMack LawnSite Member
    from PA
    Messages: 16

    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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