Merriman Dam

Merriman Dam Quick Facts

Location: Ulster, New York
Coordinates: 41.799167, -74.4327778
River: Roundout Creek River
Primary Purpose: Water Supply
Type: Earth
Commissioned: 1945
Dam Height: 195 ft (59 m)
Dam Length: 2,400 ft (732 m)
Dam Capacity: 202,800 acre-ft (250,150 Ml)
Condition Assessment: Satisfactory
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Merriman Dam Map

Merriman Dam Information

Merriman Dam is an earthen embankment dam located about 1 miles from Lackawack, Ulster, New York.

The dam, which is on the Roundout Creek River, was primarily built for Water Supply purposes, but also serves for benefits.

The dam was designed by and commissioned in 1945 and is currently owned by NYCDEP DAMS WEST OF THE HUDSON RIVER.

Merriman Dam Structure

The Merriman Dam is approximately 2,400 feet (732 m) long, 195 feet (59 m) high and has a structural volume of cubic yards (0 cubic metres).

Merriman Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 153,633 acre-ft (189,503 Ml) and maximum capacity of 202,800 acre-ft (250,150 Ml).

The surface area of the reservoir is 2,099 acres (849 ha) and the total catchment area is 95 square miles (246 square kilometres).

Merriman Dam Spillway

The dam has a 600 feet (183 m) wide uncontrolled spillway with a maximum discharge capacity of 180000 cubic feet per second (5097 cubic metres per second).

Merriman Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Merriman Dam
Ulster, New York
Height (ft)
195
Length (Ft)
2,400
Storage Volume (acre-ft)
202,800
Drainage Area (sq miles)
95
Hoover Dam
Clark County, Nevada
Height (ft)
730
Length (Ft)
1,244
Storage Volume (acre-ft)
30,237,000
Drainage Area (sq miles)
167,800
Grand Coulee Dam
Okanogan County, Washington
Height (ft)
550
Length (Ft)
5,673
Storage Volume (acre-ft)
9,562,0000
Drainage Area (sq miles)
74,100
Theodore Roosevelt Dam
Maricopa County, Arizona
Height (ft)
357
Length (Ft)
1,208
Storage Volume (acre-ft)
3,411,500
Drainage Area (sq miles)
5,736
Oroville Dam
Butte County, California
Height (ft)
235
Length (Ft)
6,920
Storage Volume (acre-ft)
3,540,000
Drainage Area (sq miles)
3,611
Glen Canyon Dam
Coconino County, Arizona
Height (ft)
216
Length (Ft)
1,565
Storage Volume (acre-ft)
29,875,000
Drainage Area (sq miles)
108,355

Merriman Dam Weather

Current Conditions at Merriman Dam

Parameter Value
Current Time 22:51
Sunrise 06:36
Sunset 16:46
Temperature (°F) 62
Feels Like (°F) 61
Cloud Coverage (%) 51
Pressure (inHg) 1016
Humidity (%) 88
Wind Speed (mph) 4
Rain (mm) 0

7-Day Forecast for Merriman Dam

Day Min Temp (°F) Max Temp (°F) Feels Like (°F) Pressure (inHg) Humidity (%) Wind Speed (mph) Wind Gust (mph) Wind Dir Precip Prob (%) Precip Volume (mm) Weather
Today 57 73 72 1015 58 13 35 W 0 - few clouds
Thu 42 62 60 1018 54 13 21 WNW 0 - few clouds
Fri 40 61 55 1014 36 14 37 WNW 0 - clear sky
Sat 34 53 47 1027 30 10 26 NW 0 - clear sky
Sun 37 48 44 1024 52 8 21 SW 100 9 moderate rain
Mon 46 57 51 1007 76 13 26 W 100 3 light rain
Tue 43 55 50 1016 65 7 19 NW 0 - overcast clouds
Wed 38 52 46 1027 69 6 14 E 0 - clear sky

Merriman Dam Frequently Asked Questions

In which state is the Merriman Dam?

Merriman Dam is in New York.

In which county is the Merriman Dam?

Merriman Dam is in Ulster County.

How high is the Merriman Dam?

Merriman Dam is 195 feet high.

How long is the Merriman Dam?

Merriman Dam is 2,400 feet long.

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More Dams in Ulster County:

Ashokan Dam
Merriman Dam
Sturgeon Pool Dam

Condition Assessment Classification

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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum

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. Investigations and studies are necessary.

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.

Not Available

Dams for which the condition assessment is restricted to approved government users.

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, environment 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.

Not Available

Dams for which the downstream hazard potential is restricted to approved government users.

Source: National Inventory of Dams

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