Dam Report

Perry City Dam No. 2 dam

Missouri, USA Mace Branch Hazard High
Today high
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Tonight low
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Dam height
13ft
Hazard rating
High
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Perry City Dam No. 2 -- None dam
Perry City Dam No. 2 None · Mace Branch
About this dam

Perry City Dam No. 2

Perry City Dam No. 2, located in Ralls, Missouri, stands as a vital structure for water supply in the region. Built in 1964, this earth dam with a structural height of 13 feet serves the purpose of water supply for the surrounding area. With a storage capacity of 90 acre-feet and a normal storage level of 32 acre-feet, the dam ensures a reliable water source for the community.

Although the dam has not been inspected since July 1980 and is labeled as having a high hazard potential, its condition remains unrated. Despite this, Perry City Dam No. 2 continues to be a crucial asset for water management in the area, serving as a testament to the importance of maintaining and monitoring our water resources. With its location on Mace Branch and under the jurisdiction of the St. Louis District, the dam plays a key role in ensuring water availability for the residents of Perry City.

As water resource and climate enthusiasts, the data surrounding Perry City Dam No. 2 offers a glimpse into the intricate infrastructure that supports our water supply. With its historical significance and essential function in water management, this dam serves as a reminder of the delicate balance between human intervention and natural resources. Despite the lack of recent inspections and ratings, the dam's role in providing water supply to the community underscores the importance of ongoing monitoring and maintenance of our water infrastructure in the face of changing climate patterns.

StateNone
River / streamMace Branch
NID IDMO10980
Owner typeLocal Government
Primary purposeWater Supply
Dam typeEarth
Year built1964
Dam height13 ft
Max storage90 AF
Normal storage32 AF
Surface area13.0 ac
Drainage area1,865.0 sq mi
Hazard potentialHigh
ConditionNot Rated
Last inspectionSat, 12 Jul 1980 00:00:00 GMT

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Perry City Dam No. 2 -- inflows here typically show up in storage 24-72 hours later.

Track Perry City Dam 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.

FAQ

About Perry City Dam No. 2

Where does the data for Perry City Dam 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 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.

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