Dam Report

Monterey City Lake dam

Tennessee, USA Garrison Branch Hazard Significant
Today high
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Tonight low
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Dam height
30ft
Hazard rating
Significant
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Monterey City Lake -- None dam
Monterey City Lake None · Garrison Branch
About this dam

Monterey City Lake

Monterey City Lake in Putnam, Tennessee, is a concrete dam constructed in 1963 on Garrison Branch. Managed by the local government, this dam stands at a structural height of 29.9 feet with a hydraulic height of 28.6 feet and a NID height of 30 feet. The reservoir has a storage capacity of 215 acre-feet, with a normal storage level of 200 acre-feet, covering a surface area of 13.8 acres and draining an area of 3.4 square miles.

Despite its satisfactory condition assessment as of September 2020, Monterey City Lake poses a significant hazard potential and is classified as having a moderate risk level. The dam's spillway type is uncontrolled, with no outlet gates, and it has an inspection frequency of every two years. The Tennessee Safe Dams Program regulates the state jurisdiction of this dam, ensuring state permitting, inspection, and enforcement to maintain its safety standards. The risk management measures and emergency preparedness of this structure are currently unspecified, warranting further attention from water resource and climate enthusiasts to ensure the lake's continued safety and functionality.

StateNone
River / streamGarrison Branch
NID IDTN14106
Owner typeLocal Government
Dam typeConcrete
Year built1963
Dam length221 ft
Max storage215 AF
Normal storage200 AF
Surface area13.8 ac
Drainage area3.4 sq mi
Hazard potentialSignificant
ConditionSatisfactory
Last inspectionMon, 21 Sep 2020 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 Monterey City Lake -- inflows here typically show up in storage 24-72 hours later.

Track Monterey City Lake 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 Monterey City Lake

Where does the data for Monterey City Lake 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 Significant 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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