Canyon Lake Gorge
Canyon Lake running over the spillway in July 2002. Photo Courtesy of the Comal County Engineer's Office
  The spillway waters destroyed part of the South Access Road in July 2002. Photo Courtesy of the Comal County Engineer's Office
  The spillway waters destroyed part of the South Access Road in July 2002. Photo Courtesy of the Comal County Engineer's Office
  The spillway waters carved a scenic new gorge out of the limestone bedrock in July 2002.
Photo Courtesy of the Gorge Preservation Society

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Texas Set to Open New Canyon to Public
The Associated Press Oct 5, 2007


CANYON LAKE, Texas (AP) — The formation of canyons, done with the flow of water over rock and time, is generally a practice in patience. But not here.


A torrent of water from a bloated Canyon Lake sliced open the earth, exposing rock formations, fossils and even dinosaur footprints in just three days. To protect Canyon Lake Gorge from vandals, it's been open only to researchers since the 2002 flood, but on Saturday, it opens to its first public tour.


"It exposed these rocks so quickly and it dug so deeply, there wasn't a blade of grass or a layer of algae," said Bill Ward, a retired geology professor from the University of New Orleans who started cataloguing the gorge almost immediately after the flood.


The gorge, which emerged where a nondescript valley covered in mesquite and oak trees once was, sits behind a spillway built as a safety valve for Canyon Lake, a popular recreation spot in the Texas Hill Country between San Antonio and Austin.


The reservoir was built in the 1960s to prevent flash flooding along the Guadalupe River and to assure the water supply for central Texas. The spillway, which protects the dam by giving the water an outlet if it gets too high, had never been overrun until July 4, 2002, when 70,000-cubic feet of water flowed through the 1,000-foot gap for three days. It gushed downhill toward the Guadalupe River and scraped the vegetation and topsoil off, leaving only limestone walls.


"Underneath us, it looks solid, but obviously it's not," said Tommie Streeter Rhoad of the the Guadalupe Blanco River Authority, as she looked out over a cream-colored limestone crevasse that plunges 80 feet at its deepest spot.


The sudden exposure of such canyons is rare but not unprecedented. Flooding in Iowa in 1993 similarly opened a limestone gorge behind a spillway at Corvalville Lake north of Iowa City, but Devonian Fossil Gorge is narrower and shallower than Canyon Lake Gorge.


Neither compares to the most famous of canyons, the Grand Canyon. It took water around 5 million to 6 million years to carve the crevasse that plunges 6,000 feet at its deepest point and stretches 15 miles at its widest.


The more modest Canyon Lake Gorge, however, still displays a fault line and rock formations carved by water that seeped down and bubbled up for millions of years before the flooding.


Some of the canyon's rocks are punched with holes like Swiss cheese and the fossils of worms and other ancient critters are everywhere. The rocks, typical of the limestone buried throughout central Texas, date back "111 million years, plus or minus a few hundred thousand years," Ward said.


Six three-toed dinosaur footprints offer evidence of a biped carnivore strolling along the water. The footprints were temporarily covered with sand to protect them as workers reinforced the spillway, but they'll be uncovered again eventually, Rhoad said. Other footprints belonging to quadraped dinosaurs are exposed, too, all moving east to west along what would have been the waterfront, Ward said.


Year-round pools of blue-green water collect along the gorge's bottom. Some still have fish that came in with the 2002 flood waters that lasted roughly six weeks as rain hit the state with an estimated $1 billion in property damage.


The Guadalupe Blanco River Authority, which has a lease from the Army Corps of Engineers to manage the 64-acre Canyon Lake Gorge site, will begin offering limited public tours of the canyon Saturday, continuing year-round on the first Saturday of the month.


Early demand for the 3-hour tours is so high they are booked for at least six months, and Rhoad said the GBRA hopes to find and train more docents so tour dates can be added. The tours include a hike of the 1 1/2-mile-long crevice with discussions on the history and geology of the canyon.


Visitors will not be allowed to hike the canyon on their own, because the brittle limestone is still breaking away from the canyon walls.


Construction on a rim trail to overlook the canyon begins this winter, and Rhoad said officials hope to eventually build lookout points and an educational center.


Canyon Lake Gorge Tours:






This low-altitude aerial photograph of Canyon Lake Gorge shows traces of faults and locations of springs, pools, and infiltration points in a channel. View is to the East Northeast, along the strike of the Hidden Valley fault.
Picture Courtesy of Southwest Research Institute





Canyon Lake Texas is a true hidden treasure of the Central Texas Hill Country. With breathtaking waterfront and lake views; this is the place where many are starting to call home. White tailed deer, foxes, roadrunners, and other wildlife are in abundance in the Texas Hill Country and especially at Canyon Lake. The Texas Hill Country is famous for its hilly terrain, live oak trees, limestone rocks, native animals, and clean fresh air.


Canyon Lake, Texas has so much to offer: Boating/Sailing, Water Skiing, Kayaking, Fishing, Scuba Diving, Helicopter Tours, Parasailing, Hiking, Dining, Shopping, and much more. Canyon Lake is located just forty miles north of San Antonio and twenty-five miles west of New Braunfels and San Marcos.


Canyon Lake has eight Corps of Engineer Public Parks, 23 boat ramps, two marinas, campgrounds, golf course, country club, and yacht club. The lake has a surface area of 8,230 acres and 80 miles of shoreline. Canyon Lake releases water down stream into the famous Guadalupe River.


Information Courtesy of the The Associated Press, Southwest Research Institute, Gorge Preservation Society, and the Comal County Engineer's Office
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