Momtazi - Reservoir #2 dam
Momtazi - Reservoir #2
Momtazi - Reservoir #2, also known as Oldsville Road Dam, is a privately owned earth dam located in Yamhill, Oregon. Built in 2000 by H & R Engineering, this dam stands at a height of 39 feet and has a storage capacity of 81 acre-feet. Despite being classified as having a low hazard potential, it is regulated and inspected by the Oregon Water Resources Department.
Situated on the unnamed tributary of the South Yamhill River, Momtazi - Reservoir #2 serves a primary purpose of "Other" and features a slide (sluice gate) outlet gate for water release. The dam does not have a spillway, but its uncontrolled spillway type suggests a carefully managed water discharge system. While the condition assessment of the dam is currently listed as "Not Rated," its risk assessment is moderate, indicating a need for ongoing monitoring and management.
For water resource and climate enthusiasts, Momtazi - Reservoir #2 presents an intriguing case study in private dam ownership and regulation. With its unique design and operational features, this earth dam offers a glimpse into the complexities of managing water resources in Oregon. As stakeholders work to ensure the safety and sustainability of this structure, it serves as a reminder of the vital role that dams play in our environment and communities.
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 Momtazi - Reservoir #2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| South Yamhill River At Mcminnville | 256 cfs | → |
| Tucca Creek Near Blaine | 7 cfs | → |
| Willamette River At Newberg | 11,100 cfs | → |
| Willamette River At Salem | 10,300 cfs | → |
| Zollner Creek Near Mt Angel | 320 cfs | → |
| Tualatin River Near Dilley | 96 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Momtazi - Reservoir #2.
Boat launches
Campgrounds
- Hiker/Biker Camp
- Beaver Island Group Camp
- Fan Creek Campground
- Dovre Campground
- Elk Bend Campground
- Alder Glen Campground
Track Momtazi - Reservoir #2 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 Momtazi - Reservoir #2
Where does the data for Momtazi - Reservoir #2 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.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Momtazi - Reservoir #2.