One of my concerns is water permeability. In the PNW we have 80 inches of rain a year. For a gravel road I think the best option is to crown the surface and have ditches for water drainage. Without this I think the geotech fabric needs to allow for water passing through it. In the graph you have at 28:30 of fabrics and their ratings I understand that to be per square foot per minute, but that seems absurdly high. If a cubic foot is 7.5 gallons and 1440 minutes in a day THEN 6" of rain would need a flow rate of .003 gallons per minute/sq.ft. to accommodate a daily maximum average. I am not needing a filter fabric for a french drain. Do I have the permeability factors wrong?
Hi Stan, thank you for the question. Our Cascade Geosynthetics sales team, located in the PNW, would be happy to discuss the specifics of your project with you and assist to ensure the best results. Please email salescascade@cascadegeos.com or call our office at 971-339-1020. One of our technical sales reps will be able to answer your question and go over details of our different geosynthetics offerings.
I'm new to geotextiles for paving. This was very helpful for a 300 foot gravel shared driveway project I am about to start. Thanks.
8noy
One of my concerns is water permeability. In the PNW we have 80 inches of rain a year. For a gravel road I think the best option is to crown the surface and have ditches for water drainage. Without this I think the geotech fabric needs to allow for water passing through it. In the graph you have at 28:30 of fabrics and their ratings I understand that to be per square foot per minute, but that seems absurdly high. If a cubic foot is 7.5 gallons and 1440 minutes in a day THEN 6" of rain would need a flow rate of .003 gallons per minute/sq.ft. to accommodate a daily maximum average. I am not needing a filter fabric for a french drain. Do I have the permeability factors wrong?
Hi Stan, thank you for the question. Our Cascade Geosynthetics sales team, located in the PNW, would be happy to discuss the specifics of your project with you and assist to ensure the best results. Please email salescascade@cascadegeos.com or call our office at 971-339-1020. One of our technical sales reps will be able to answer your question and go over details of our different geosynthetics offerings.
Very good production, segments and an index. Could have used higher resolution for better graph readability.