Ukumehame Reservoirs dam
Ukumehame Reservoirs
The Ukumehame Reservoirs in Maui, Hawaii, consisting of Ukumehame Reservoir No. 2 & No. 3, are privately owned irrigation structures regulated by the Hawaii Department of Land and Natural Resources. These earth dams, primarily used for irrigation purposes, stand at a height of 29 feet with a storage capacity of 43.9 million gallons. With a surface area of 2.3 acres and a drainage area of 3.95 square miles, these reservoirs play a crucial role in water resource management in the region.
Despite their importance, the Ukumehame Reservoirs have been flagged for high hazard potential and poor condition assessment, indicating a need for maintenance and potential risk management measures. The last inspection in June 2015 revealed the need for improvements, and the condition assessment in April 2021 reiterated the urgent need for upgrades. While the reservoirs currently meet state permitting and inspection requirements, their operational and safety aspects require further attention to ensure long-term sustainability and functionality.
Climate and water resource enthusiasts monitoring the Ukumehame Reservoirs should take note of the ongoing maintenance needs and the high hazard potential associated with these vital irrigation structures. With a moderate risk rating and a history of poor condition assessment, these reservoirs serve as a focal point for conservation efforts and infrastructure upgrades to ensure the continued availability of water resources in Maui, Hawaii.
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 Ukumehame Reservoirs -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Iao Stream At Kepaniwai Park Nr Wailuku | 87 cfs | → |
| Waihee River At Dam Near Waihee | 55 cfs | → |
| Honokohau Stream Near Honokohau | 28 cfs | → |
| Kahakuloa Stream Near Honokohau | 17 cfs | → |
| Opana Tunnel Near Kailiili | 2 cfs | → |
| Honopou Stream Near Huelo | 5 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Ukumehame Reservoirs.
Campgrounds
- Papalau Camping
- Camp Olowalu
- Camp Olowalu - Maui
- Chemin Vers La Côte
- Maybe Camping
- Kanaha Beach Park - Maui
Track Ukumehame Reservoirs 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 Ukumehame Reservoirs
Where does the data for Ukumehame Reservoirs 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 Ukumehame Reservoirs.