Region 9 Upper Colorado Flood Planning Region

The upper reaches of the Colorado River and its tributaries flow from the High Plains ecoregion near the Texas-New Mexico border towards the Edwards Plateau. The Upper Colorado and Concho Rivers merge at O.H. Ivie Reservoir, which marks the border between the Upper Colorado (Region 9) and Lower Colorado-Lavaca (Region 10) Flood Planning Regions. There are 15 major lakes and reservoirs in this region.

For a detailed map of Region 9, please visit the Texas Geographic Information Office (TxGIO) Flood Planning Regions Map Collection.

Go to Region 9 Upper Colorado RFPG External Host Website

Population Estimate (2019): 629,788

Approximate Area: 21,254 square miles

Approximate Stream Miles: 8,044

Approximate NFIP Claims (1975-2019): $5,860,005

Counties Represented:

• Andrews*
• Borden*
• Cochran
• Coke
• Coleman*
• Concho*
• Crockett*
• Dawson*
• Ector*
• Gaines
• Garza*
• Glasscock
• Hockley*
• Howard
• Irion
• Lynn*
• Martin
• Menard*
• Midland*
• Mitchell*
• Nolan*
• Reagan*
• Runnels*
• Schleicher*
• Scurry*
• Sterling
• Taylor*
• Terry*
• Tom Green
• Upton*
• Winkler*
• Yoakum

*indicates this county is partially within this RFPG and is also represented by at least one other RFPG

Major Cities (Population greater than 25,000):

• Big Spring
• Midland
• Odessa
• San Angelo
• West Odessa

Major Lakes & Reservoirs:

• Champion Creek Reservoir
• E V Spence Reservoir
• Lake Ballinger / Lake Moonen
• Lake Colorado City
• Lake J B Thomas
• Lake Nasworthy
• Lake Winters / New Lake Winters
• Mitchell County Reservoir
• Natural Dam Lake
• O C Fisher Lake
• O H Ivie Reservoir
• Oak Creek Reservoir
• Red Draw Reservoir
• Sulphur Springs Draw Storage Reservoir
• Twin Buttes Reservoir

Ecoregions of Texas Represented:

• Edwards Plateau
• High Plains
• Rolling Plains
• Trans-Pecos