PennDOT Pub 408 Section 855: Pumped Water Filter BAG

855.1DESCRIPTION—This work is furnishing, installing, maintaining, and disposing of a Pumped Water

Filter Bag as indicated.

855.2MATERIAL—

(a)Pumped Water Filter Bag. From a manufacturer listed in Bulletin 15, meeting the following requirements:

1.Constructed from non-woven geotextile material with the physical properties listed below:

Property Test Method Units Value Mass per Unit Area, Min. ASTM D5261 oz/sy 10 Breaking Load (Grab Strength), Min. ASTM D4632 lbs 250 Tearing Strength (Trapezoidal Method), Min. ASTM D4533 lbs 100 Puncture Strength, Min. ASTM D6241 lbs 775 UV Resistance After 500 Hours, Min. Strength Retained ASTM D4355 % 70 Apparent Opening Size (AOS), Max. Sieve Size ASTM D4751, Method A U.S Standard Sieve No. 100 (0.150 mm)

2.Bag size: 15.0 feet by 15.0 feet (± 0.25 feet).

3.Sewn with a double 401 chain lock stitch or double needle stitch with a minimum seam strength of

100 pounds per inch according to ASTM D4884.

4.Constructed with an adjustable sewn in spout capable of handling a maximum hose size diameter

of 6 inches.

5.Labeled with maximum flowrate of bag in gallons per minute.

(b)Coarse Aggregate. AASHTO No. 57. Section 703

(c)Lifting Straps. Of sufficient strength to support load of bag.

(d)Geotextile for Underlayment. Class 4, Type A. Section 735

855.3CONSTRUCTION—As shown on the Standard Drawings, at the location indicated or directed, and

as follows: Locate bag in a well vegetated (stabilized) area. Discharge onto a stable, erosion resistant area. When vegetated area is not available, provide geotextile (Class 4, Type A) lined flow path to a stable erosion resistant receiving water course or a well vegetated (stabilized) area. Install compost berm or compost filter sock below bags located in High Quality (HQ) or Exceptional Value

(EV)watersheds, within 50 feet of any receiving surface water, or where a well vegetated (stabilized) area

is not available. Locate bag on level area. When level area is not available, place AASHTO No. 57 Coarse Aggregate to level bag. Do not install bags in areas with slopes steeper than 5%. Do not exceed a pump rate of 750 gallons per minute or half the maximum specified by the manufacturer, whichever is less. Insert hose into sewn-in spout and double clamp bag firmly to pump discharge hose. Do not install more than one pump hose into a single bag. Do not allow discharge from the bag to drain back into work or access areas of the project.

Monitor and evaluate entire pumping operation to assure that bag continues to function properly. Replace bag when contained silt reduces flow to approximately 50% of rate of initial bag discharge, or when directed. Dispose of bag and sediment in a manner satisfactory to the Representative. Do not cut open bags and seed. Restore area as specified in Section 105.14.

855.4MEASUREMENT AND PAYMENT—Each

856 – 1

Referenced in this section

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Source: Publication 408 Highway Construction Specifications, 2026 Edition. Pages 782–0 of 1,522. View official source ↗

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854 TEMPORARY SLOPE PIPE

856 ROCK BARRIER

855PUMPED WATER FILTER BAG

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