GONZALES- The Ascension Parish Council is expected to recommend late this year what team of engineers and financiers should design, build and operate a $300 million to $500 million regional sewer system.
    
The partnership with the parish would last for the next three decades.
    
Parish officials say advertisements asking for proposals from private businesses that want to partner with the parish government in the project are expected to be sent out Thursday,
    
Ascension has been among Louisiana's fastest-growing parishes since the 1990s, and its three municipalities all have public sewage treatment systems, but most of unincorporated Ascension lacks public sewer with a few small exceptions.