S-338 dam
S-338
S-338, also known as Canal 1, is a state-regulated dam located in Miami-Dade, Florida. Completed in 1979, this dam serves a primary purpose of water supply and is owned by the state of Florida. With a maximum storage capacity of 242 acre-feet and a normal storage of 136 acre-feet, S-338 plays a crucial role in ensuring water availability for the surrounding area.
Standing at a height of 26 feet, S-338 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. While the last inspection date recorded was in 1905, the dam is subject to state permitting, inspection, and enforcement to ensure its continued safe operation. Although there are no associated structures or federal agency involvement with S-338, its importance in water management for the region cannot be understated.
With its location in the heart of New Tamiami Airport, S-338 is a key component in the infrastructure that supports water supply needs in the area. Climate and water resource enthusiasts can appreciate the vital role that S-338 plays in maintaining water security and mitigating potential risks associated with water scarcity in the region. As efforts continue to manage and regulate this dam, it remains a critical piece of the water resource puzzle in Miami-Dade, Florida.
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 S-338 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Levee 31 North Extension At 7 Mile Nr West Miami F | 74 cfs | → |
| Levee 31 North Extension At 5 Mile Nr West Miami F | 121 cfs | → |
| Levee 31 North Extension At 4 Mile Nr West Miami F | 85 cfs | → |
| Levee 31 North Extension At 3 Mile Nr West Miami F | 42 cfs | → |
| Levee 31 North Extension At 1 Mile Nr West Miami | 94 cfs | → |
| Tamiami Canal East End 1 Mile Bridge Nr Miami | 77 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near S-338.
Boat launches
- Tamiami Trail, Florida
- L-29 Miami-Dade County
- North Snapper Creek Drive 9746-9788, Miami
- Falls Boat Launch
- Southwest 8th Street 24990, Miami-Dade County
- Southwest Guadalajara Street Coral Gables
Campgrounds
- Larry And Penny Thompson Park
- Long Pine Key - Everglades National Park
- Long Pine Key Campground
- Boca Chita Key Campground
- Elliott Key Campground
- Cb Smith Park
Track S-338 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 S-338
Where does the data for S-338 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 Low 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.