Quick Facts About Ish #3 (Main Dam)
Ish #3 (Main Dam) Map
Ish #3 (Main Dam) Information
Ish #3 (Main Dam) is an earthen embankment dam located about 3 miles from Berthoud, Larimer, Colorado.
The dam, which is on the Big Thompson River-Os, was primarily built for Irrigation purposes, but also serves for benefits.
The dam was designed by and commissioned in 1905 and is currently owned by THE ISH RESERVOIR COMPANY.
Ish #3 (Main Dam) Structure
The Ish #3 (Main Dam) is approximately 6,700 feet (2,042 m) long, 42 feet (13 m) high and has a structural volume of 29,318 cubic yards (22,415 cubic metres).
Ish #3 (Main Dam) Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 7,128 acre-ft (8,792 Ml) and maximum capacity of 9,065 acre-ft (11,181 Ml).
The surface area of the reservoir is 314 acres (127 ha) and the total catchment area is 1 square miles (3 square kilometres).
Ish #3 (Main Dam) Spillway
The dam has a 60 feet (18 m) wide uncontrolled spillway with a maximum discharge capacity of 3066 cubic feet per second (87 cubic metres per second).
Ish #3 (Main Dam) Compared to Four Famous American Dams
| Ish #3 (Main Dam) Larimer, Colorado |
Hoover Dam Clark County, Nevada |
Grand Coulee Dam Okanogan County, Washington |
Theodore Roosevelt Dam Maricopa County, Arizona |
Glen Canyon Dam Coconino County, Arizona |
|
|---|---|---|---|---|---|
| Height (ft) | 42 | 730 | 550 | 357 | 216 |
| Length (Ft) | 6,700 | 1,244 | 5,673 | 6,920 | 1,565 |
| Storage Volume (acre-ft) | 9,065 | 30,237,000 | 9,562,000 | 3,540,000 | 29,875,000 |
| Drainage Area (sq miles) | 1 | 167,800 | 74,100 | 3,611 | 108,355 |
Ish #3 (Main Dam) Weather
Current Conditions at Ish #3 (Main Dam)
Failed to fetch current weather data.7-Day Forecast for Ish #3 (Main Dam)
Failed to fetch weather forecast data.Ish #3 (Main Dam) Frequently Asked Questions
Ish #3 (Main Dam) is in Colorado.
Ish #3 (Main Dam) is in Larimer County.
Ish #3 (Main Dam) is 42 feet high.
Ish #3 (Main Dam) is 6,700 feet long.
More Dams in Larimer County:
Boyd Lake DamCache La Poudre Dam
Carter Lake Dam No. 1
Chambers Lake Dam
Cobb Lake Dam
Douglas Dam
Dry Creek Dam
Floodwater Ret. B-2 Dam
Floodwater Ret. B-3 Dam
Fossil Creek Dam
Halligan Dam
Handy Dam
Horseshoe Lake (East Dam)
Horseshoe Lake (South Dam)
Horsetooth Dam
Ish #3 (Main Dam)
Joe Wright Dam
Lake Loveland Dam
Lon Hagler Dam
Lone Tree Dam
Long Draw Dam
Loveland Water Storage Dam
Mariano Dam
Milton Seaman Dam
North Poudre # 5 Dam
North Poudre # 6 Dam
North Poudre #15 Dam
Park Creek Dam
Rawhide Dam
Rocky Ridge Dam
Terry Lake Dam
Windsor #8 Dam
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Baseline - East Dam
Baseline - Northwest Dam
Beaver Park Dam
Big Beaver Dam
Bijou #2 Dam #1
Bijou #2 Dam #2
Bijou #2 Dam #3
Bijou #2 Dam #4
Black Hollow Dam
Blue Mesa Dam
Blunn Dam
Bonny Dam
Boulder - North Dam
Boulder - South Dam
Boyd Lake Dam
Brush Hollow Dam
Button Rock Dam
Cache La Poudre Dam
Carter Lake Dam No. 1
Chambers Lake Dam
Cheesman Dam
Clear Creek Dam
Clinton Gulch Dam
Cobb Lake Dam
Continental Dam
Cotter Tailings Dam
Crawford Dam
Crooked Arroyo Det Ca-1 Dam
Crooked Arroyo Det Ca-2 Dam
Crystal Creek Dam
Crystal Dam
Dillon Dam
Douglas Dam
Dry Creek Dam
Dunes Dam
Eastdale #1 Dam
Eastdale #2 Dam
Eleven Mile Canyon Dam
Elkhead Creek Dam
Empire (East Embankment) Dam
Empire (Mcintyre Dike)
Empire (Nw Embankment) Dam
Empire (Outlet Embankment) Dam
Condition Assessment Classification
Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor
A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner’s property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Source: National Inventory of Dams