Journal-Times (Grayson, KY)

Update

July 10, 2013

Results revealed for hydrological study

July 10, 2013 —

Preliminary results of the Tygart’s Creek hydrological study , as well as potential flood mitigation options were unveiled during a public hearing Tuesday night in Olive Hill.

 

Stantec project manager Jonathan Keeling, who was in charge of the study, was on hand at the meeting to present the findings and field questions from the community.

 

The study included a complete topographical analysis of the 74 square mile watershed surrounding Olive Hill, which was then used to calculate flood profiles for theoretical 10, 50, 100 and 500 year flood events.

 

“We’ve compared our data to the 2011 study by FEMA. Based on that comparison, we’re talking about an increase of one to two feet in flood elevations based on the new study,” Keeling said.

 

The study also suggests new floodplain boundaries that closely resemble those on the current FEMA flood maps, but do include some variations based on the data collected.

 

Keeling also laid out three potential options for mitigating the impact of potential flooding in the future.

 

The first option focuses on improving water flow in Tygart’s creek by replacing the Chili Street (KY 986) bridge with a more elevated structure, as well as removing abutments and piers from various abandoned railroad crossings in the creek.

 

Keeling reported that the sstimated cost for the bridge replacement is approximately $1.08 million while removing the railroad obstructions would potentially carry a $768,000 price tag.

 

A second option presented at the meeting focuses on building structures, such as levees and flood walls, to prevent flooding within Olive Hill city limits.

 

Keeling presented multiple configurations for layout of these structures, with costs ranging from $4.8 million to $31.2 million depending on size.

 

The third option presented involves construction of a water retention basin and dam system to capture excess water flow. Cost of this option could range from $4 to $5 million depending on the basin’s retention capacity.

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