Tag Archives: sinkholes

Resolution No. 14-10, Hamilton County, FL, 19 August 2014

Other Florida, Georgia, and Alabama counties could do what Hamilton County, Florida just did in this this resolution. Even before it got this resolution, FERC yesterday directed Sabal Trail to deal with what Chris Mericle had been saying, including proposing routes to minimize crossing the Withlacoochee River or to avoid crossing it entirely.

Chris Mericle sent a PDF copy of the resolution with its attached hydrogeological report. I’ve added links to the other referenced documents.

Chris is the local host for the September WWALS Outing on the Withalacoochee and Suwannee Rivers, where you can come float past that same area Sunday 21 September, and see many local springs, sinkholes and shoals that need to be protected from that pipeline.

RESOLUTION NO. 14-10

BOARD OF COUNTY COMMISSIONERS
HAMILTON COUNTY, FLORIDA Continue reading

Sabal Trail avoid sensitive karst regions –Hamilton County FL Commission to FERC

Last Friday a resolution to FERC saying the Sabal Trail fracked methane pipeline should avoid sensitive karst limeston regions affecting water resources passed the Hamilton County, Florida Commission.

Joyce Marie Taylor has added the following to her article in the Suwannee Democrat 25 August 2014, Hamilton fights back against Sabal Trail pipeline,

A special meeting was called on Friday, Aug. 22, and the board voted to pass Resolution 14-10 that expressed their concerns about the proposed pipeline route across the Withlacoochee River that forms the western boundary of Hamilton County.

A portion of the resolution states, Continue reading

Protect the Withlacoochee River from the Sabal Trail Pipeline –Chris Mericle at the Hamilton County Commission

Chris Mericle, local host for the September WWALS Outing, spoke to the Hamilton County Commission last Tuesday about the same section of the Withlacoochee River, where the Sabal Trail fracked methane pipeline is proposed to cross. You can come float past it yourself Sunday 21 September, and see many local springs, sinkholes and shoals that need to be protected from that pipeline, continuing on to where the pipeline would cross the Suwannee River.

Joyce Marie Taylor wrote for the Suwannee Democrat 25 August 2014, Hamilton fights back against Sabal Trail pipeline, Continue reading

Videos: Aquifers, sinkholes, and groundscans –Prof. Don Thieme

We had to move to a larger room, so many attended this groundwater talk at VSU (about 90). Plus a guest appearance by SAVE.

Crowded small room Larger Magnolia Room

Coastal Plain Surficial Deposits, Groundwater Resources, and Recent Subsidence in south Georgia by Prof. Donald M. Thieme @ VSU for WWALS 2013-10-09 Here are Dr. Donald M. Thieme‘s slides in PDF, with his longer title:

Coastal Plain Surficial Deposits, Groundwater Resources, and Recent Subsidence in south Georgia

While we are lucky to have abundant groundwater, both from the Upper Floridan Aquifer 100 feet below us trapped in Eocene limestones and from shallow groundwater with its karst features, nonetheless overpumping has caused falls in the level of the aquifer (about 0.6 feet a year at Valdosta), resulting in rapid loss of shallow groundwater, plus surface water that enters and often contaminates the aquifer through those karst features.

Summary: abundant groundwater from Upper Floridan aquifer and shallow groundwater Summary: Fall in level of upper Floridan aquifer is primary cause for....

Sometimes those karst features subside and manifest as sinkholes like the one that ate Snake Nation Road in Lowndes County and others that can develop slow (many years) or fast (weeks or minutes).

Subsidence Problems in south Georgia and north Florida Snake Nation Road sinkhole

There were also many questions, starting with what water do personal wells reach? Also including a brief history of Valdosta well drilling from artesian to hundreds of feet down, and a sinkhole in a garage in Lowndes County, should local governments require sinkhole insurance (including mention of Moody AFB subsidence and Florida citrus growers pumping so much water it causes sinkholes). I also introduced the WWALS board members present: Gretchen Quarterman (Treasurer and videoing), Bret Wagenhorst (Outings), Heather Brasell (Secretary), Dave Hetzel (President), April Huntley (Director), me (Vice President), and Chris Graham (Member); plus a brief summary of WWALS events and outings. Here’s a video playlist:

Continue reading