This topic was touched on in the forum several years ago. It's quite an interesting topic as one way or another if the project comes to fruition it WILL affect those folks living in Udon Thani Province. I've seen nothing of import on this topic in the Thai news for a long time.. Some of you might live in the affected areas and be able to shed light on what's really going on right now.
This is the most recent I've found (2009) that implies Italian-Thai is moving forward with the mine
http://engagetheworld.wik.is/Issue_Resources/Development_Projects/Mining/Profiles/Thailand,_Udon_Thani_-_ITD_Potash_Mine
A 2008 article talks about the anti-mining villagers south of Udon
http://towardfreedom.com/home/asia/1463-thai-opposition-to-potash-mine-becomes-community-wide-fight
The only 2009 BKK Post article I can find appears to be from the learning English section http://www.readbangkokpost.com/business/agriculture/thailands_fertiliser_industry.php
A link back to an earlier actual news article is here http://www.bangkokpost.com/business/economics/23417/more-public-participation-urged-to-solve-potash-woes
The fact that Udon has two huge Potash deposits that are surveyed as having literally millions of tons of recoverable Potassium used in fertilizer comes and goes in the media.
This is the most detailed article on the deposits I've found http://www.geog.pn.psu.ac.th/association/geology/journal/Geology%20of%20the%20Udon%20Thani%20Potash%20Deposits%20With%20Overview_for.pdf
It's quite academic but lays out the surveyed resources and expectations of recoverable Potash reserves. Khon Khean University has a decent powerpoint on the Potash
[url]home.kku.ac.th/laa/Potash003_2Udon%20Thani.ppt[/url]
This project has been up in the air for years now, caught up in accusations of phony Environmental Impact Assessments.
A nephew of mine, an abbot of a temple in the potentially mined area was an anti-mining activist over seven years ago due to the possibility of massive salt contamination that could occur as a by-product of mining. Even he doesn't know what's going on with the project now and his Wat is about 6 km from the Udon South area that is owned, fenced and guarded by the company that owns the project now.
On a worst case basis, if handled in typical Asian exploitative fashion, this project could totally destroy the agricultural ability of Udon province. Potash mining produces salt, both in liquid form and in dust. This could cause salt pollution of both the watershed feeding northward into the Mekong and the watershed feeding south past Nong han Khumpawapi. Since it's all deep mining (300-500 meters) it could also cause subsidence in all areas the mines are under.
If it were handled exceptionally well, it could mean a huge employment boost in the province and make Thailand quickly independent in Potassium fertilizer, which is a key cost to farmers in Thailand today. Some of the articles I've linked appear to delve into the environmental aspects in a very pro-mine way...
Looking at how most exploitative projects in Thailand are handled, i.e. with any dissent quashed and protesters arrested, I really wonder what's truly going on here. The financial incentive to get this project producing Potash is absolutely huge...
The south Udon Potash deposit is located east of Non Soong wihich is about 15 km south of Udon on RTE 2.
The prospective North Udon deposit appears to be paralell the railway line from Udon center to south about 10km and go east quite a ways..









