Mcmillen No. 2 dam
Mcmillen No. 2
Mcmillen No. 2, located in Goshen, Wyoming, near MORRILL, NEB, is a privately owned irrigation dam on DRY CREEK. Constructed in 1955, this Earth-type dam stands at 19 feet tall with a hydraulic height of 14 feet and a length of 969 feet. With a storage capacity of 202 acre-feet, the dam serves the primary purpose of irrigation, providing vital water resources to the surrounding area.
Despite its low hazard potential, Mcmillen No. 2 is currently in poor condition, as assessed during the last inspection in February 2018. The dam is regulated by the Wyoming State Engineer's Office and is subject to regular inspection, permitting, and enforcement. It is equipped with an uncontrolled spillway and a single valve for outlet gates. While the risk assessment for this dam is moderate, there are no specific risk management measures or emergency action plans in place as of now.
Water resource and climate enthusiasts will find Mcmillen No. 2 an intriguing case study, highlighting the importance of maintaining and monitoring aging infrastructure for sustainable water management. The dam's location in a dry region underscores the crucial role it plays in supporting agricultural activities through irrigation. With its historical significance and current condition, Mcmillen No. 2 presents an opportunity for stakeholders to collaborate on ensuring the continued safety and functionality of this essential water resource infrastructure.
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 Mcmillen No. 2 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| North Platte River At Wyoming-Nebraska State Line | 193 cfs | → |
| Laramie River Near Fort Laramie | 41 cfs | → |
| Lodgepole Creek At Bushnell | 1 cfs | → |
| North Platte River Below Whalen Diversion Dam | · | → |
| Sybille Creek Ab Canal No. 3 | 93 cfs | → |
| Sybille Creek Ab Mule Creek | 143 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mcmillen No. 2.
Campgrounds
- Hawk Springs State Rec Area
- Zeigler Park - Mitchell
- Scenic Knolls City Golf Course And Campground
- Robidoux Rv Park
- Primitive Campsites
- Riverside Park - Terrytown
Fishing spots
Paddle runs
More reservoirs
Track Mcmillen No. 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 Mcmillen No. 2
Where does the data for Mcmillen No. 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 Mcmillen No. 2.