Lopez Dam Quick Facts
Lopez Dam Map
Lopez Dam Information
Lopez Dam is an earthen embankment dam located about 6.5 miles from Arroyo Grande, San Luis Obispo, California.
The dam, which is on the Arroyo Grande Cr River, was primarily built for Water Supply purposes, but also serves for Irrigation and Recreation benefits.
The dam was designed by and commissioned in 1969 and is currently owned by San Luis Obispo County Flood Control and Water Conservation District.
Lopez Dam Structure
The Lopez Dam is approximately 1,120 feet (341 m) long, 166 feet (51 m) high and has a structural volume of 3,538,000 cubic yards (2,704,996 cubic metres).
Lopez Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of acre-ft (0 Ml) and maximum capacity of 52,500 acre-ft (64,758 Ml).
The surface area of the reservoir is 950 acres (384 ha) and the total catchment area is 68 square miles (176 square kilometres).
Lopez Dam Spillway
According to the latest available data, the Lopez Dam does not have any spillways.
Lopez Dam Compared to Five Famous American Dams
Lopez Dam Weather
Current Conditions at Lopez Dam
| Parameter | Value |
|---|---|
| Current Time | 22:18 |
| Sunrise | 07:08 |
| Sunset | 18:26 |
| Temperature (°F) | 58 |
| Feels Like (°F) | 58 |
| Cloud Coverage (%) | 100 |
| Pressure (inHg) | 1015 |
| Humidity (%) | 88 |
| Wind Speed (mph) | 0 |
| Rain (mm) | 0 |
7-Day Forecast for Lopez 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 | 57 | 75 | 75 | 1016 | 45 | 7 | 8 | WSW | 0 | - |  |
| Wed | 57 | 75 | 73 | 1014 | 43 | 8 | 9 | W | 0 | - |  |
| Thu | 48 | 69 | 67 | 1011 | 32 | 10 | 10 | W | 0 | - | |
| Fri | 45 | 69 | 62 | 1015 | 19 | 12 | 17 | NE | 0 | - | |
| Sat | 50 | 70 | 67 | 1018 | 11 | 11 | 8 | SW | 0 | - | |
| Sun | 52 | 74 | 70 | 1020 | 10 | 8 | 7 | WSW | 0 | - | |
| Mon | 55 | 78 | 75 | 1015 | 10 | 6 | 6 | WSW | 0 | - |  |
| Tue | 56 | 77 | 72 | 1016 | 13 | 7 | 5 | SW | 0 | - | |
Lopez Dam Frequently Asked Questions
Lopez Dam is in California.
Lopez Dam is in San Luis Obispo County.
Lopez Dam is 166 feet high.
Lopez Dam is 1,120 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