Remember that Halloween night in 2013? Onion Creek at US Route 183 in Austin saw history unfold. A deluge unlike any in recent memory transformed this usually gentle creek into a raging torrent. Onion Creek swelled to a terrifying 40.15 feet. This was a level not witnessed since 1921.
Onion Creek is more than just a pretty waterway. It’s a vital part of Austin’s history and its landscape. Its origins lie southeast of Johnson City in Blanco County. It then flows eastward about 79 miles. Finally it merges with the Colorado River near Garfield in Travis County. The creek’s journey passes near Dripping Springs and Driftwood. It even supplies the falls of McKinney Falls State Park.
But this tranquil beauty masks a powerful force. The 2013 flood was catastrophic. Nine to ten inches of rain fell in just four hours. The resulting flow exceeded 120,000 cubic feet per second. That’s more than double the flow rate of Niagara Falls. The consequences were devastating. Five lives were lost. More than 500 homes suffered damage from the floodwaters.
The aftermath prompted significant action. The City of Austin purchased hundreds of homes in the floodplain. This was a bold step towards mitigating future risks. These properties now form the northern part of Onion Creek Metropolitan Park. A park built on lessons learned. A park built on the resilience of a community.
The USGS monitoring station here at Onion Creek at US Route 183 has a rich history. Data on water levels and flow rates go back to 1869. This continuous record provides invaluable insights into the creek’s behavior. This information is crucial for managing flood risks. It helps us understand the past to better predict the future.
Onion Creek is a reminder. A reminder of nature’s power and the importance of preparedness. A visit to this spot allows one to reflect on the past. It also gives us a chance to consider our future in this vibrant part of Austin. We must respect the power of Onion Creek. We must learn from its past floods to ensure a safer future for all.