The Office of Response and Restoration responded to the March 22, 2014 collision of the M/V Summer Wind with the tank-barge Kirby 27706 in Galveston Bay, near Texas City, Texas. The collision, which closed the Houston Ship Channel for several days, resulted in the largest U.S. oil spill response since 2010's Deepwater Horizon incident. Roughly 168,000 gallons of oil spilled, spreading 200 miles south to Aransas National Wildlife Refuge, home to endangered species such as whooping cranes and sea turtles. Within 24 hours, OR&R was on scene, coordinating with NOAA's National Weather Service to provide localized forecasts and National Marine Fisheries Service to assess wildlife threats and support recovery efforts. OR&R responders also modeled the spread of oil, identified natural resources at risk, conducted aerial and shoreline surveys of beaches, and provided cleanup recommendations. OR&R used its online mapping tool ERMA® to display up-to-date operational response data for multiple command posts and remote field staff. Through NOAA's Damage Assessment, Remediation, and Restoration Program, OR&R now is conducting a Natural Resource Damage Assessment to identify injuries to natural resources, impacts to people's uses of resources, and restoration needs from the spill.