| Business | Phone |
| Us Army Corps Of Engineers 2202 15th St 4196, San Antonio 78234 | (210) 225-3475 |
| Us Army Corps Of Engineers 4203 Woodcock Dr 241, San Antonio 78228 | (210) 731-3460 |
| Us Fish & Wildlife Svc 1874 Grandstand Dr, San Antonio 78238 | (210) 681-8419 |
| Us Geological Survey 5563 De Zavala Rd # 290, San Antonio 78249 | (210) 530-6003 |
| Us Geological Survey 435 Isom Rd # 234, San Antonio 78216 | (210) 530-6003 |