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Dewatering Bag - Reusable Model

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Detains both oil and sediment, offering a combination of benefits not available in alternative dewatering bags.

  • Standard and custom sizes available.
  • Accommodates up to 6" discharge hose.
  • Helps comply with NPDES, 40 CFR 122.26 (1999) when used as Best Management Practice in Storm Water Pollution Prevention Plans.

Other Dewatering Bags:

  • Reusable Model, Contains Sediment And Oil Pumped Out During Dewatering Operations. Detains both oil and sediment, offering a combination of benefits not available in alternative dewatering bags.
  • Standard and custom sizes available.
  • Accommodates up to 4" discharge hose

How to use:

Install the Ultra-DewateringBag on a slope so incoming water flows downhill through the Ultra-DewateringBag without creating more erosion. Strap the neck of the Ultra-DewateringBag tightly to the discharge hose. To increase the efficiency of filtration, place the bag on an aggregate or hay bale bed to maximize water flow through the surface area of the bag. The Ultra-DewateringBag is full when it no longer can efficiently filter sediment or pass water at a reasonable rate. Flow rates will vary depending on the size of the Ultra-DewateringBag, the type and amount of sediment discharged into the Ultra-DewateringBag, the type of ground, rock or other substance under the bag and the degree of the slope on which the bag lies. Under most circumstances Ultra-DewateringBag will accommodate flow rates of 1500 gallons per minute. Use of excessive flow rates or overfilling
Ultra-DewateringBag with sediment will cause ruptures of the bags or failure of the hose attachment straps. Dispose of the Ultra-DewateringBag as directed by the site engineer. If allowed, the Ultra-DewateringBag may be cut open and the contents seeded after removing visible fabric.

Features

How much does a full Ultra-Dewatering Bag weigh? (Based on a unit full of wet sand which weighs approx 120 lbs per cu ft):

  • 6′ × 6′ × 1′ holds approx 36 cu ft (1.3 cubic yds) Total weight full approx 4320 lbs.
  • 10′ × 15′ holds approx 150 cu ft (5.6 cubic yds) Total weight full approx 18,000 lbs.
  • 15′ × 15′ × 1′ holds approx 225 cu ft (8.3 cubic yds) Total weight full approx 27,000 lbs.

Notes:

  • Flow/dewatering rates will vary dramatically according to soil type.
  • Sand will typically flow/dewater at the fastest rate with clay flowing the slowest.
  • Clay can also blind over the fabric in some instances blocking flow entirely.
  • Clean fabric will flow @ 90 gpm per sq ft
  • Dewatering Bags are normally allowed to dry in place then cut open and
    spread/removed with heavy equipment.

Specs

Dimensions:

  • 9729-O/S – 3′ × 4′ (915 × 1,220mm)
  • 9724-O/S – 6′ × 6′ (1,829 x a,829mm)
  • 9725-O/S – 10′ × 15′ (3,048 × 4,572mm)
  • 9727-O/S – 15′ × 15′ (4,572 × 4,572mm)

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Dewatering Bags - Standard is a UltraTech Spill Containment brand product.

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