The document discusses the Comal and San Marcos Springs in Texas, which are major sources of river flows to Gulf of Mexico bays and estuaries. The springs are home to endangered species and are cultural and economic assets for the regions. Spring communities have developed HCP work plans to restore and improve habitat, mitigate the effects of recreation, and implement practices to protect water quality and flows to the springs. The plans include removing invasive plants and fish, stabilizing banks, contour terracing for erosion control, and delineating protected scientific study areas.