Dille Diversion Dam

Overview
The Big Thompson Dam exists on the Big Thompson River west of Loveland, Colorado. Although "Big Thompson" was its original name, the small diversion dam has since been renamed the "Dille Diverision Dam." The purpose of Dille is to divert water from the Big Thompson River through the foothills less than a mile for delivery into the Charles Hansen Feeder Canal. From there, the water is dropped back to the river via the Big Thompson Power Plant for additional hydro-electric power generation. In all, water diverted at Dille is only "borrowed" from the last mile of the river as it winds down the canyon. What makes Dille unique is that it provides extra flexibility in overall operations of the C-BT project. Project water can be re-routed down the Big Thompson Canyon and captured at Dille to be brought back into the project, if needed.

General
RegionFacilities in Great Plains | Great Plains Home Page
StateColorado
CountyLarimer
ProjectColorado-Big Thompson
Dam Type
Reservoir
WatercourseBig Thompson River
Location
Longitude-105.14096
Latitude40.4041
Net Generation8,234,900 kWh
Original Construction1950
Modified Construction
National ID Number
Hydrologic Unit Code

Dimensions
Structural Height35 ft
Hydraulic Height (Normal Operating Depth at Dam)8 ft
Top Parapet (Elevation)
Spillway Crest Elevation
Crest Elevation5500.0 ft
Crest Length90 ft
Crest Width20 ft
Base Width20 ft
Volume of Dam Construction Materials2235 cu yd
Streambed at Dam Axis
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)
Top of Inactive Conservation Pool (Elevation)
Top of Dead Storage Pool (Elevation)

Hydraulics & Hydrology
Volume
Total Water Storage at Elevation
Maximum Water Surface Elevation
Normal Water Surface Elevation
Spillway Type
Auxiliary Spillway
Spillway Capacity at Elevation7000 cfs at 5495.4
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation
Diversion Capacity at Elevation
Drainage Area
Hydrometeorological Report (HMR)
Probable Maximum Flood (PMF) Report

Contact Information
Owner
TitleArea Office Manager
OrganizationEastern Colorado Area Office
Address11056 W. County Rd 18E
CityLoveland, CO 80537-9711
Phone (Fax)970 663-3212
Phone (Office)970 667-4410
Operator
TitleArea Office Manager
OrganizationEastern Colorado Area Office
Address11056 W. County Rd 18E
CityLoveland, CO 80537-9711
Phone (Fax)970 663-3212
Phone (Office)970 667-4410


Last updated: Mar 29, 2013