Portland #6 (Mt.Tabor) dam
Portland #6 (Mt.Tabor)
Portland #6, also known as Mt. Tabor, is a crucial water supply infrastructure located in Multnomah County, Oregon. Owned by the local government, this dam on the Bull Run River (offstream) was completed in 1911 and serves as a primary source of water for the city of Portland. With a dam height of 28 feet and a storage capacity of 230 acre-feet, Mt. Tabor plays a vital role in ensuring a reliable water supply for the region.
Maintained and regulated by the Oregon Water Resources Department, Mt. Tabor has a high hazard potential but is currently in satisfactory condition as of the last inspection in August 2020. The dam features a needle outlet gate and has a spillway width of 0. Despite its age, Mt. Tabor continues to meet the water supply needs of the community, showcasing the importance of effective infrastructure management and maintenance in the face of changing climate conditions.
With a history dating back over a century, Portland #6 (Mt. Tabor) stands as a testament to the resilience and foresight of water resource managers in Oregon. As climate change impacts become more pronounced, the maintenance and operation of dams like Mt. Tabor will be crucial in ensuring adequate water supply for future generations. As a key component of the region's water infrastructure, Mt. Tabor serves as a reminder of the intricate balance between water resource management, climate resilience, and community sustainability.
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 Portland #6 (Mt.Tabor) -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Willamette River At Portland | 17,500 cfs | → |
| Johnson Creek At Milwaukie | 21 cfs | → |
| Johnson Creek At Sycamore | 3 cfs | → |
| Kelley Creek At Se 159th Drive At Portland | 1 cfs | → |
| Tryon Creek Blw Nettle Creek | 1 cfs | → |
| Fanno Creek At 56th Ave | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Portland #6 (Mt.Tabor).
Boat launches
- Vera Katz Eastbank Esplanade Hosford-Abernethy
- Duckworth Memorial Dock
- South Waterfront Greenway Central District Water Access Path South Portland
- South Waterfront Park Trail Downtown
- Sellwood Riverfront Park
- Waverly Marina
Campgrounds
- Clackamette Rv Park
- Barton Park Camping
- Barton Park
- Oxbow Regional Park
- Kingfisher Group Camp
- Mciver State Park
Track Portland #6 (Mt.Tabor) 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 Portland #6 (Mt.Tabor)
Where does the data for Portland #6 (Mt.Tabor) 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 Portland #6 (Mt.Tabor).