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re: Back flooding and built up neighborhoods
Posted on 1/21/20 at 8:19 am to fallguy_1978
Posted on 1/21/20 at 8:19 am to fallguy_1978
across from Autumnwood?
1
Posted on 1/21/20 at 8:20 am to Bedhog
quote:
I'm worried that it may next time because of the raised developments. Don't know why this is so hard to grasp.
Unless the new developments are blocking stormwater runoff (as in they built the development in the middle of a creek) I seriously doubt this is going to be an issue.
Posted on 1/21/20 at 8:21 am to Bedhog
It's right after you pass over the bridge on the right coming from S Harrells Ferry. We live in Woodland Ridge on the other side of the creek.
Posted on 1/21/20 at 8:22 am to Bedhog
Building up the land, will essentially cause water to run off to lower elevations (i.e. surrounding areas) unless other water management solutions are deployed.
Most parts of the country will thus require either the developer to build these themselves (such as retention ponds and dedicated green space) or charge a fee per parcel to develop them parish-wide.
If Watson isn't doing this, my guess is because the developers are politically connected, or, the locals in charge think those ideas are "liberal".
Most parts of the country will thus require either the developer to build these themselves (such as retention ponds and dedicated green space) or charge a fee per parcel to develop them parish-wide.
If Watson isn't doing this, my guess is because the developers are politically connected, or, the locals in charge think those ideas are "liberal".
Posted on 1/21/20 at 8:23 am to Bedhog
quote:
How are developers being allowed to do this?
Not sure of the developments you are seeing but it's likely they are forced to do it. The US Corps of Engineers have adjusted the flood maps over the years so newer homes have to be built higher than the older homes. I built my house in an older neighborhood and I am about 18" higher than my neighbors which are just 20' away.
quote:
Anywhere else in the area being built up like these?
Everywhere. Developers aren't gleefully spending money on dirt and drainage systems. They are complying with the requirements. It's no different than building a new house and having to comply with newer building codes.
Posted on 1/21/20 at 8:24 am to AtticusOSullivan
quote:
As long as proper stormwater management infrastructure is put in place it shouldn't be an issue.
Welcome to south Louisiana. Where every government infrastructure project is a family jobs program first and an improvement project second.
Posted on 1/21/20 at 8:24 am to NYNolaguy1
what i'm seeing is these neighborhoods digging ponds for build up dirt and bringing some in. I do not see how a pond being dug is good water management.
Posted on 1/21/20 at 8:26 am to NYNolaguy1
But unless the dirt used to build up the new house came from the same flood plain the new house is built on, there’s a better chance existing houses will flood with less than the 33” of rain you speak of
Posted on 1/21/20 at 8:28 am to ashy larry
quote:Here is one development I was talking about. Most of the neighborhood north of this development did not flood but came very close to it. You can see it backs up to the Amite river. They have brought in tons of dirt for this project and I have not seen any remediation to the surrounding area for water drain off. I have friends that live here and I'm worried that they may flood now if another event like 16 happens. Google Map
Everywhere. Developers aren't gleefully spending money on dirt and drainage systems. They are complying with the requirements. It's no different than building a new house and having to comply with newer building codes.
Posted on 1/21/20 at 8:29 am to Bedhog
quote:
I do not see how a pond being dug is good water management.
The retention pond is just a piece of the puzzle in stormwater management. The pond fills up and it drains to something else.
Posted on 1/21/20 at 8:30 am to Bedhog
These retention pond they are being forced to build should be empty until a big rain. They serve no purpose if they hold water all the time
Posted on 1/21/20 at 8:31 am to Bucktail1
quote:exactly my point. Once full of water they do no good.
These retention pond they are being forced to build should be empty until a big rain. They serve no purpose if they hold water all the time
Posted on 1/21/20 at 8:31 am to AtticusOSullivan
quote:
As long as proper stormwater management infrastructure is put in place it shouldn't be an issue.
The issues I saw were threefold.
1) Improper designs and calculations during the design phase with rubber-stamp approval officials.
2) Improper construction practices when building the stormwater infrastructure as well as improper sediment controls during development of the neighborhoods. SWPPP approval and enforcement is a joke in Louisiana.
3) Improper/No maintenance of the stormwater infrastructure once constructed. They don't just take care of themselves, and if they're not maintained, then they lose capacity.
SOP for the area is curb and gutter to subsurface pipes to a detention/retention facility. Sometimes the detention/retention facility is traded out for an offsite mitigation pit. It's an outdated design, especially when no foresight is given to maintenance and capturing the water where it falls.
Posted on 1/21/20 at 8:32 am to ashy larry
quote:
The retention pond is just a piece of the puzzle in stormwater management. The pond fills up and it drains to something else.
Yea, the same rivers that literally everything else is draining into. Then the river crest arrives and everyone floods. Then they are pissed because they didn’t have flood insurance so they blame government, who then blames developers because it’s easy to do. It’s easy to blame developers because voters can SEE the new homes being built up higher. That’s easier than explaining to our dumb fricking populace how rain water management works.
Dammit, I said I was leaving the thread and I got sucked back into it.
This post was edited on 1/21/20 at 8:34 am
Posted on 1/21/20 at 8:33 am to Bedhog
quote:
You can see it backs up to the Amite river.
Unless this new development is blocking the drainage/flow from the old neighborhood and not diverting/correcting it, I don't see why this is a problem. A piece of land being higher does not mean the neighboring land will flood.
Posted on 1/21/20 at 8:33 am to Oilfieldbiology
Several new small streets of development along Tiger Bend put water in some houses near Confederate and Petersberg which had never ever sniffed water before even in 2016 in Shenandoah last June. The theory is the run off went to that area because it had no where else to go. This is going to continue to happen as these new neighborhoods go up simply because the woods used to absorb the water and it didnt run off and the proper drainage is most certainly not being done.
Posted on 1/21/20 at 8:34 am to LSUFanHouston
quote:
the locals in charge think those ideas are "liberal".
I lost count of how many times I was called a NWO liberal globalist for proposing modern stormwater best management practices. It was pathetic. Posted on 1/21/20 at 8:34 am to Oilfieldbiology
quote:
But unless the dirt used to build up the new house came from the same flood plain the new house is built on, there’s a better chance existing houses will flood with less than the 33” of rain you speak of
This.
Most(not all) of the flooding in 2016 was backwater flooding and not from storm water run off. Water from north of our area filled our flood plain and backed up in every tributary and overflowed.
If you add dirt to the flood plain, backwater flooding will be aggravated; however, if you move dirt around in the flood plain and you leave an appropriate “reservoir” then the capacity of the basin won’t change.
Posted on 1/21/20 at 8:34 am to Bedhog
Watson got their share of flooding, but not the worst...see Central which lies in both the Amite basin and the Comite basin
Posted on 1/21/20 at 8:36 am to ashy larry
quote:I have no idea really which is why I'm asking. The optics are all I have to go on. Would also like to see an updated flood map.
Unless this new development is blocking the drainage/flow from the old neighborhood and not diverting/correcting it, I don't see why this is a problem. A piece of land being higher does not mean the neighboring land will flood.
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