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Dredging of the Las Salinas Lagoon

by Marty, Colorado / Ixtapa, Friday, May 16, 2014, 07:57 (4488 days ago)

From reading the local newspapers it appears that the work on dredging the Las Salinas Lagoon has been stopped by an injunction. I have not seen why the injunction was granted or how long it will last. Can someone explain this?

The photos from the newspapers makes it look like the Lagoon has been dug up.


Can someone from El Centro give details on how much has been done and provide any photos?

Dredging of the Las Salinas Lagoon

by Tess, Friday, May 16, 2014, 08:49 (4488 days ago) @ Marty

from this link:Article

this is apparently the 2 acre holding field for when they begin the dredging.[image]

Dredging of the Las Salinas Lagoon

by katherine @, Friday, May 16, 2014, 09:25 (4488 days ago) @ Tess

I tried to read the article. Granted, my translation skills are not perfect. But it seems to be saying -- in essence -- don't worry. This project will be completed on time and everything will be fine. There will be hoses hooked up to drain the lagoon into these holding ponds. There will be some temporary disruptions (!!) but everything will be fine and the project will be completed on schedule.

Dredging of the Las Salinas Lagoon

by Lee@98223, Friday, May 16, 2014, 09:56 (4488 days ago) @ katherine

Your use of "essence" gives extra meaning.

Dredging of the Las Salinas Lagoon

by katherine @, Friday, May 16, 2014, 10:04 (4488 days ago) @ Lee@98223

:megusta:

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Dredging of the Las Salinas Lagoon

by ZihuaRob ⌂ @, Zihuatanejo, México, Friday, May 16, 2014, 12:15 (4488 days ago) @ Tess

Notice the use of plastic sheeting to "protect" the land from the sludge they are going to extract. Granted, I'm no expert in the field, and maybe this IS how it's done, but it looks to me like they cut some corners to make it look like they're taking precautions they actually aren't taking correctly, because the toxic sludge is certainly going to seep into the ground and thus contaminate more land than it already has.

This was the government's response to the injunction by the environmental group ROGAZ, who just wants the government to do things correctly instead of causing even more problems. The municipal government is making this a political game instead of carrying out their due diligence and testing the sludge for contaminants (chemicals, toxins, heavy metals, etc) or carrying out an Environmental Impact Study which I believe would normally be required. But lawmakers in Mexico unfortunately seem to find it quite easy to ignore the laws they find inconvenient. For the sake of political expedience they are risking causing an even greater public health risk, and I agree with ROGAZ that this project deserves a more serious and professional approach than the local government is giving it.

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Oops! I forgot the link

by ZihuaRob ⌂ @, Zihuatanejo, México, Friday, May 16, 2014, 13:09 (4488 days ago) @ ZihuaRob

THIS was the local government's official response: to politicize the dredging project instead of even considering that the environmentalists may have a point. I'm not saying the environmentalists at ROGAZ are necessarily right, but they AREN'T the enemy, they are just concerned citizens like many of us, and they deserve more respect than the government is giving them, even if some of them are disrespectful during their encounters with the local government officials.

Diversos sectores desaprueban demanda de ROGAZ
[image]

Oops! I forgot the link

by katherine @, Friday, May 16, 2014, 14:41 (4488 days ago) @ ZihuaRob

Thanks for the info, Rob.

Dredging of the Las Salinas Lagoon

by Gringo Viejo @, Kansas/Zihuatanejo, Friday, May 16, 2014, 15:26 (4488 days ago) @ ZihuaRob

Agree totally with your assessment of the containment pond lining (but I am far from being an expert in this field) but looks to me like the hydraulic pressure from a full pond will "puch" the contents up and under the plastic lining or it will leak thru as there doesn't appear to be any sealing of the plastic panels.

Dredging of the Las Salinas Lagoon

by judi in OKlahoma, Friday, May 16, 2014, 18:00 (4488 days ago) @ ZihuaRob

Notice the use of plastic sheeting to "protect" the land from the sludge they are going to extract. Granted, I'm no expert in the field, and maybe this IS how it's done, but it looks to me like they cut some corners to make it look like they're taking precautions they actually aren't taking correctly, because the toxic sludge is certainly going to seep into the ground and thus contaminate more land than it already has.

This is a disaster waiting ...

do things correctly instead political game of carrying out their due diligence and testing the sludge for contaminants (chemicals, toxins, heavy metals, etc) or carrying out an Environmental Impact Study which I believe would normally be required.

No EIS? WTF? What is wrong with this picture?

[image]

Where's this storage area?

by HolyMole, Sunday, May 18, 2014, 18:06 (4486 days ago) @ Tess

The article doesn't mention the location of this 2 acre storage/drainage area and I can't tell from the photo.
Presumably it's in the Las Salinas area. Where, relative to the corner of Morelos and Cinco de Mayo?

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My Next Question

by Marty, Colorado / Ixtapa, Friday, May 16, 2014, 16:59 (4488 days ago) @ Marty

First, thanks to those of you giving replies. Good discussion is always beneficial.

My next question is about the water treatment plants at Las Salinas. Have they been fixed? Is the problem solved? Or are we just going to put raw sewage back into the lagoon after it is dredged?

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My Next Question

by ZihuaRob ⌂ @, Zihuatanejo, México, Friday, May 16, 2014, 17:41 (4488 days ago) @ Marty

First, thanks to those of you giving replies. Good discussion is always beneficial.

My next question is about the water treatment plants at Las Salinas. Have they been fixed? Is the problem solved? Or are we just going to put raw sewage back into the lagoon after it is dredged?

No, the sewage treatment plants aren't fixed. I don't think they are operating at all. The alleged "re-engineering" of one of the two plants is reportedly "60% done" in the first of three stages. Sounds like politico-speak to me. The plants aren't supposed to be operational until next March at the earliest. The dredging is supposed to done within 6 months.

But the reason for the amparo or injunction is because the government has presented no integrated plan or even an Environmental Impact Study. The Study should be the least thing they could do in order not to just waste the money they're spending.

La reingeniería de planta La Marina avanza un 60 por ciento en su primera etapa

Concede Juzgado Octavo suspensión provisional del dragado de Las Salinas

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Current sewage discharge

by Marty, Colorado / Ixtapa, Friday, May 16, 2014, 17:57 (4488 days ago) @ ZihuaRob

Right now, were is all the sewage from La Noria and Las Salinas going? Still into the lagoon?

Current sewage discharge

by ZihuaRx @, Friday, May 16, 2014, 18:32 (4488 days ago) @ Marty

For the first time in 23 years my wife wouldn't go in the water at La Ropa today. There was so much garbage plus mainly an oily green viscous substance that appeared as bubbles and gave a green hue to the water....yeah, not too scientific, but that's what it looked like. I myself went in hoping it was just algae. Take care everyone.

Current sewage discharge

by RJ @, Friday, May 16, 2014, 19:19 (4488 days ago) @ Marty

Yes Marty, raw sewage direct. I believe La Ropa's plant is not functioning very well either. One thing about sewer systems is the water keeps coming because you can't shut it off. even when they get the upgrades done it will not be sufficient enough to treat all the waste water that is produced nonstop by the amount of users we have here now. Let alone 5 years from now.

the area they use now is simply too small to have enough containment to allow for sufficient treatment to do any good. treatment 101

I will bet that the new sediment pond is going to stay as part of the sewage treatment efforts later. It actually makes sense. It has increased the capacity greatly and works the same as a sediment pond most large modern plants use on the downstream side or 3rd stage. Then it can be closed and cleaned. Of course the lagoon will be used as the discharge after that. like I said earlier the input rate minus evaporation minus heavy sediment, equals discharge . The trick is to get the discharge clean enough to be at an " acceptable level"

then to get real fancy$$ you can take this discharge and either pump it far out into the sea with an outfall (second best) or inland to an evaporation lagoon$$$ even bigger than what they just dug (best). but remember you still will have to have an overflow for when it rains torrentially and that would have to be in some natural drainage near the selected area. by the time this sewage lagoon overflows it would be fairly clean and could even be treated again at this outfall....

In Petatlan they dump their raw sewage onto a large low laying area that eventually drains into the Petatlan river.... about 4 kms away. It is one of the best and cheapest way to rid the problem short term. As long as it is not in anyone's back yard...it doesn't seem to be.

and then you went and totally redeemed yourself

by ZihuaRx @, Saturday, May 17, 2014, 18:13 (4487 days ago) @ RJ

What a great day on La Ropa...next to no garbage in water or on beach and the water quality was better....lot's of people having fun...musica in all directions...people everywhere getting buried in the sand....fiesta....just a really good time...Take care.