Construction & Future Development


What's Needed to Utilize Lake Alan Henry Water?

Capacity of Lake Alan Henry and Water Volume

When the lake is operating at full operational level (elevation 2220 feet above mean sea level), the lake will:

John T. Montford Dam Construction Facts

Composition
6.5 Million cubic yards of soil, clay and soil-cement

Height of Dam
138 Feet

Crest Elevation
2,263 Feet above Sea Level

Length of Dam
3,600 Feet

Width of Dam
1,000 Feet wide at the base

Service Spillway (Concrete)
Designed to pass 15.6 million gallons per minute.

Emergency Spillway (Earthen)
Designed to pass 211 million gallons per minute.

Lake Alan Henry's spillway was used for the first time on Saturday, October 2, 2004, after rains filled the lake. Brazos River Authority staff indicated that "everything is in good shape, and the spillway is doing it's job."