The Pecan Waterhole Watershed (HUC 11140106) covers an area of approximately 391 square miles in west-central Texas. The watershed is characterized by semi-arid to arid conditions, with an average annual precipitation of around 18 inches. The hydrology of the watershed is dominated by intermittent streams and ephemeral washes, with occasional flash floods. The watershed is home to several reservoirs, including the E.V. Spence Reservoir, which is used for irrigation, recreation, and municipal water supply. The reservoir has been experiencing decreasing water levels due to drought conditions in recent years. The area experiences hot summers and cool winters, with occasional winter storms bringing snow and ice. The snowpack in the watershed is typically minimal and melts quickly. Overall, the Pecan Waterhole Watershed faces ongoing challenges related to water availability and management in the face of changing climatic conditions.