Dam Report

Allen Town Pond (Allen Road) dam

Maryland, USA Passerdyke Creek Hazard Low
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Tonight low
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Dam height
8ft
Hazard rating
Low
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Allen Town Pond (Allen Road) -- None dam
Allen Town Pond (Allen Road) None · Passerdyke Creek
About this dam

Allen Town Pond (Allen Road)

Allen Town Pond, also known as Allen Pond, is a picturesque water resource located in Polk Landing, Maryland. Managed by the local government, this dam structure on Passerdyke Creek serves primarily for recreational purposes. Built in the early 1700s, the earth dam stands at a height of 8 feet and stretches 400 feet in length, providing a serene environment for visitors to enjoy its 35.8-acre surface area.

With a storage capacity of 176 acre-feet, Allen Town Pond offers a tranquil escape for outdoor enthusiasts seeking water-based activities. The dam's controlled spillway and low hazard potential make it a safe and enjoyable location for boating, fishing, and picnicking. Despite being structurally modified in 1989, the dam's condition remains unrated, yet it continues to attract visitors due to its scenic beauty and historical significance.

While the dam's risk assessment is categorized as very high, the local government ensures regular inspections and enforcement to maintain the safety and integrity of the structure. With its rich history, natural surroundings, and recreational opportunities, Allen Town Pond remains a beloved destination for water resource and climate enthusiasts seeking a peaceful retreat in Somerset County, Maryland.

StateNone
River / streamPasserdyke Creek
NID IDMD00123
Owner typeLocal Government
Primary purposeRecreation
Dam typeEarth
Year built1700
Dam height8 ft
Dam length400 ft
Max storage176 AF
Normal storage96 AF
Surface area35.8 ac
Drainage area12.7 sq mi
Hazard potentialLow
ConditionNot Rated
Last inspectionWed, 14 Jun 2017 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 Allen Town Pond (Allen Road) -- inflows here typically show up in storage 24-72 hours later.

Track Allen Town Pond (Allen Road) 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 Allen Town Pond (Allen Road)

Where does the data for Allen Town Pond (Allen Road) 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.

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