Cidra Dam dam
Cidra Dam
Cidra Dam, also known as Lago Cidra, is a gravity dam located on the Bayamon River in Cidra, Puerto Rico. Constructed in 1946 by renowned designer Malcolm Pirnie, the dam serves the primary purpose of water supply for the region. With a height of 115 feet and a hydraulic height of 108 feet, the dam boasts a capacity of 10,800 acre-feet and a surface area of 268 acres, providing essential water resources for the area.
The dam's spillway, which is uncontrolled and 131 feet wide, ensures the safe discharge of water during periods of excess flow. Despite its high hazard potential, the dam's condition is assessed as satisfactory, with regular inspections ensuring its structural integrity. The risk assessment for Cidra Dam is moderate, indicating a proactive approach to risk management and emergency preparedness. With state regulation and enforcement in place, the dam remains a vital asset for water supply and climate resilience in Puerto Rico.
Overall, Cidra Dam stands as a critical infrastructure asset in the region, providing essential water resources and contributing to climate resilience efforts. With its impressive design and capacity, the dam plays a crucial role in water supply management and flood control on the Bayamon River. As a publicly owned utility, the dam's operation and maintenance are overseen by state regulatory agencies, ensuring its continued safety and functionality for the community it serves.
Dam data reference
Condition Assessment
- 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.
- 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.
- 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.
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, environmental 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.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Cidra Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Rio De Bayamon Blw Lago Cidra | 6 cfs | → |
| Rio De Bayamon At Arenas | 0 cfs | → |
| Rio De La Plata At Comerio | 50 cfs | → |
| Rio Turabo Abv Borinquen | 22 cfs | → |
| Rio Bairoa Abv Bairoa | 4 cfs | → |
| Rio Caguitas At Villa Blanca At Caguas | 13 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Cidra Dam.
More reservoirs
Track Cidra Dam in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Cidra Dam
Where does the data for Cidra Dam come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the High hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Cidra Dam.