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Montana Flumes

For Applications without Submerged Flow
Montana flumes are a modification of the popular parshall flume. They have a similar shape, but do not include the throat and discharge sections of the parshall flume. Fiberglass Montana flumes are used to measure sanitary/municipal sewage flows in instances with no submergence. Montana flumes come in various sizes and options, include multiple accessories and are used in several applications.

Montana Flume Sizes & Options

Montana flumes are a popular choice for wastewater management systems as they come in over 15 sizes. They are sized based on throat width and conform to standardized dimensions published in the U.S. Department of the Interior, Bureau of Reclamation, and Water Measurement Manual. Each flume size is used for a specific recommended flow rate. The most common Montana flumes are 48-inches or shorter and are designed for the following flow rates:

  • 1” 2 – 85 GPM
  • 2” 3 – 210 GPM
  • 3” 3 – 834 GPM
  • 6” 22 – 1,754 GPM
  • 9” 40 – 3,979 GPM
  • 12” 146 – 7,336 GPM
  • 18” 227 – 11,021 GPM
  • 24” 296 – 14,853 GPM
  • 30” 366 – 18,721 GPM
  • 36” 434 – 22,618 GPM
  • 48” 567 – 30,484 GPM

Montana Flume Accessories

To make your waste management system most efficient, TRACOM offers several accessories for Montana flumes. Most of these are also available for Parshall flumes and include:
  • Ultrasonic mounting brackets
  • Bubble tubes
  • Sample tubes
  • Submerged probe cavities
  • Stilling wells (attached and detached)
  • Staff gauges
  • Removable probe holders
  • Inlet end adapters
  • Pipe stubs
  • Flanged end connections
  • Fiberglass grating
  • Inlet wingwalls
  • Multi-piece construction
  • Nesting
  • Chemically resistant gel coat

Montana Flume Applications

Montana flume applications are limited due to the concern regarding submerged flow. They are known for their success in industrial process discharge and irrigation and agricultural runoff, however are also used in other specific areas. These include:

To learn more about where Montana flumes are commonly found or to receive a full list of sizes and accessories, contact TRACOM today. Our knowledgeable staff has over 30 years of industry experience and can point you in the right direction of which style flume to choose. Speak to a specialist today by calling 877-435-8637

Additional Examples

Technical Details

Product Data Sheet
Installation Instructions
Specifications
Flume Sizes and Recommended Flow Ranges
Size & Style Recommended Flow Rates
1” 2 – 85 GPM
2” 3 – 210 GPM
3” 3 – 834 GPM
6” 22 – 1,754 GPM
9” 40 – 3,979 GPM
12” 146 – 7,336 GPM
"18” 227 – 11,021 GPM
24” 296 – 14,853 GPM
30” 366 – 18,721 GPM
36” 434 – 22,618 GPM
48” 567 – 30,484 GPM
60” 995 – 38,426 GPM
72” 1,181 – 46,431 GPM
84” 1,828 – 54,489 GPM
96” 2,076 – 62,591 GPM
120” 2,575 – 162,414 GPM
144” 3,057 – 275,541 GPM