Little Cypress Creek, often referred to as “Harris County’s 22nd watershed, is a significant exception, since it is actually a tributary in the larger Cypress Creek watershed. While it is not always delineated separately on watershed maps, Little Cypress Creek does have its own watershed letter, “L.”
Another notable Harris County subwatershed is Halls Bayou, which is a major tributary of Greens Bayou, designated by the letter “P.” While Halls shares the “P” watershed letter with Greens, it is the sole focus of the ongoing Halls Ahead planning effort.
Watersheds in Harris County come in all shapes and sizes – some larger, some smaller. Each eventually drains into Galveston Bay… and each has its own independent flooding issues.