Tieton Dam Quick Facts
Tieton Dam Map
Tieton Dam Information
Tieton Dam is a concrete rockfill earth dam located about 24 miles from Naches, Yakima, Washington.
The dam, which is on the Tieton River, was primarily built for Flood Risk Reduction purposes, but also serves for Irrigation and Recreation benefits.
The dam was designed by DOI WPRS and commissioned in 1925 and is currently owned by US Bureau of Reclamation.
Tieton Dam Structure
The Tieton Dam is approximately 920 feet (280 m) long, 196 feet (60 m) high and has a structural volume of 2,049,000 cubic yards (1,566,573 cubic metres).
Tieton Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 198,000 acre-ft (244,229 Ml) and maximum capacity of 203,600 acre-ft (251,137 Ml).
The surface area of the reservoir is 2,525 acres (1,022 ha) and the total catchment area is 119,000 square miles (308,209 square kilometres).
Tieton Dam Spillway
The dam spillway has a maximum discharge capacity of 45700 cubic feet per second (1294 cubic metres per second).
Tieton Dam Compared to Five Famous American Dams
Tieton Dam Weather
Current Conditions at Tieton Dam
| Parameter | Value |
|---|---|
| Current Time | 17:36 |
| Sunrise | 07:39 |
| Sunset | 16:51 |
| Temperature (°F) | 26 |
| Feels Like (°F) | 18 |
| Cloud Coverage (%) | 53 |
| Pressure (inHg) | 1038 |
| Humidity (%) | 90 |
| Wind Speed (mph) | 8 |
| Rain (mm) | 0 |
7-Day Forecast for Tieton Dam
| Day | Min Temp (°F) | Max Temp (°F) | Feels Like (°F) | Pressure (inHg) | Humidity (%) | Wind Speed (mph) | Wind Gust (mph) | Wind Dir | Precip Prob (%) | Precip Volume (mm) | Weather |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Today | 17 | 34 | 26 | 1031 | 85 | 10 | 14 | W | 0 | - |  |
| Wed | 16 | 36 | 35 | 1037 | 99 | 8 | 8 | W | 0 | - |  |
| Thu | 20 | 37 | 33 | 1028 | 105 | 8 | 11 | W | 18 | - | |
| Fri | 13 | 32 | 27 | 1025 | 94 | 6 | 8 | W | 99 | - |  |
| Sat | 10 | 30 | 27 | 1029 | 67 | 4 | 4 | WNW | 0 | - |  |
| Sun | 13 | 34 | 34 | 1029 | 93 | 3 | 3 | W | 0 | - | |
| Mon | 18 | 37 | 37 | 1028 | 101 | 3 | 3 | E | 0 | - |  |
| Tue | 23 | 38 | 38 | 1025 | 104 | 5 | 3 | W | 0 | - | |
Tieton Dam Frequently Asked Questions
Tieton Dam is in Washington.
Tieton Dam is in Yakima County.
Tieton Dam is 196 feet high.
Tieton Dam is 920 feet long.
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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