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City reviews flood grant report | Preston Citizen

City reviews flood grant report

February 20, 2013
By

By ROBERT S. MERRILL

Assistant editor

Proposals for a remediation plan to help alleviate seasonal flooding in the northeast section of Preston were explained to the city council on Monday.

Derrick Sharp, of Whisper Mountain in Pocatello, has been working with the city for almost two years to help with design and implementation of a long-term plan to divert runoff in this area of the community.

One year ago Sharp told city officials they had been awarded a $46,000 grant from the Federal Emergency Management Agency to help develop the plan.

FRANKLIN CTY WEED 3X4 2-6

In December 2010, rain and melting snow from agriculture lands to the north of a Greenpointe Estates subdivision near the golf course resulted in water ponding around three homes at the south end of the development, adjacent to Highway 34. Storm-water problems occurred again on several occasions during the spring of 2011.

The runoff in the general area used to be collected and funneled away by a series of irrigation canals. However, in the summer of 2010 plastic irrigation pipe was installed as part of a gravity-feed system and the canals were abandoned and most of them filled.

“We have determined there is no outlet in this area for the runoff water to go when it melts,” said Sharp. “We are proposing two methods to handle this problem.

“The first is to divert water to the east and into the Worm Creek drainage area several blocks from the subdivision. We will need to raise the banks of two golf course ponds to capture some of the runoff when it occurs.

Water will then be directed into culverts into a proposed settling pond and then into Worm Creek. This proposal comes with a price tag of $435,000.”

Sharp said a second plan is to capture runoff and divert it to the west into the Bear River. The elevations are so shallow with this concept that drainage ditches will have to be quite deep, he continued.

“This is the most expensive alternative and estimated costs are $589,000,” he said. “The city has two sources of funding to help pay for either of this plans, which are both cost-effective.

This story is sponsored by Franklin County Weed Department.

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