Archive for Thursday, August 10, 2006

Lagoon reclamation studied

August 10, 2006

The Eudora City Council agreed to have its city engineer draw up plans to bring a long-mothballed sewer lagoon back to life as a way of dealing with capacity issues during storms.

The action at the council's July 24 meeting came as Pat Cox of BG Consultants completed soil and geologic studies to confirm the lagoon's usefulness in dealing with excessive inflow and infiltration.

"It's just average daily flow is what we're after, but it takes a flow diversion basin like this to accomplish that," Cox said.

Cox estimated it would cost about $1 million to rehabilitate the lagoon.

Rehabilitating the lagoon was one of two options Cox suggested to the council for protecting the plant from peak flows during storms.

The other option would require the city to purchase an emergency generator.

"Currently we don't have an electrical standby generator and emergency enerator," Cox said.

Instead of feeding power to the plant from an outside source should electricity fail the lagoon, the lagoon would be used as a flow diversion basin to collect the excess storm water and pump it into the system steadily once power is restored.

Although the city might be able to purchase a used generator and have both backup options, retrieving the lagoon would benefit the city in the long run by increasing efficiency, Cox said.

"The problem we get into when doing good planning for a city is that we know what we have to plan for the future," Cox said.

Given Eudora's growth rate, there are many unknowns in estimating the life expectancy of the treatment plant Eudora City Engineer Brian Kingsley, also of BG Consultants.

"You can look into the crystal ball now and five years down the road, we're going to have a lot better answer for you," Kingsley said.

For estimation, Kingsley proposed using Eudora's rate of change as a mile marker.

"How long it takes for Eudora to double is the question," Kingsley said.

In order to keep the system as efficient as possible, the city needs to reduce the excess water being pumped into the system," Kingsley said.

"We have to get a handle on it, or it's going to eat up some of the capacity before we get there," Kingsley said.

The city might bond out money to pay for this project and others relating to the city's infrastructure. Eudora City Administrator Cheryl Beatty said.

"It's a six-month to a year-long process," Beatty said.

The council gave a unanimous consensus for Cox to go forward with the lagoon project.

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