FREQUENTLY ASKED QUESTIONS
We're considering using ScourStop in conjunction with Vmax3 SC250 as streambank stabilization on a bike trail project. Looking at your website, I see you recommend the bottom of the scourstop should be 6" above the normal water elevation. Why is that?
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thanks for your inquiry. The picture may not be quite clear enough, as we are recommending ScourStop over a geotextile a few inches above the waterline, and extending into the water 1-2 ft as dictated by a low water level. So ScourStop will secure the geotextile and thus protect the soil both below the water, and a few inches above - to wherever vegetation will flourish. thanks
I know that you said one bucket of hardware for 25 panels, but how many anchors are included? On one detail sheet it said to put 11 anchors on the first mat and 8 on the rest but the detail only showed 8?
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There are 150 anchors in the bucket, for an average of 6 per sheet. The first row of mats requires 8 anchors, but the second row of mats if shingled can share the last row of anchors in the first row of mats. Additional anchors may be needed to ensure adequate and consistent contact with the surface (not gaps greater than one inch).
How do I get a contractor to be a certified installer?
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The Certified ScourStop Installer Exam is now available online! Click here to link to the exam.
I have been asked to consider the use of scour stop for a project I am working on. They owner would like to use this product in lieu of riprap or gabions. I do not have pipe culverts on my project only large box culverts with high velocities. I also have drop structures that have grouted riprap slash pools and buried riprap at the ends of the slash pools to control local erosion. My velocity at the ends of the box culverts range for 18 fps at the end of a double 12'h x 4'v and 11 fps at the end of a double 12'h x 6'v. The velocity of water at the end of the drop structure splash pool is around 7 fps. There will be some flows year round in the channel where the scour stop would be located if used. Is this a concern. The bottom of the channel will be a wetlands type bottom. I anticipate TRM will be needed throughout the channel bottom due to continuous flows and a clay gravel soil structure. If there is any additional information you need from me or design details of where I would like to use this application please contact me. Richard Sudmeier
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thanks for your interest. i don;t think any TRMs would be appropriate under constant flow conditions. it sounds like your discharge area is fairly level and you will be digging in this splash area? this extra construction might be quite difficult in a saturated soil area. if the above is fairly close, i feel ScourStop would perform if the water can dissipate into an 'open' discharge area (versus a confined channel?). assuming the 'larger' numbers above associated with culverts are actually the width, i would recommend a ScourStop area 20 ft wide and 20 ft long apron for each PLUS ScourStop mats stacked at the outfall of the higher velocity culvert for the initial 4 ft (in other words, an extra 3 mats 12 ft). In addition, you must install a soil cover under the ScourStop mats - this would probably be a product like Pyramat, a high-performance TRM; AND this Product would also need to extend downstream at least another 20 ft past the end of the ScourStop mats. the entire area 20X40 could then be plugged with wetland plants, or over-seeded with wetland type plants, and mulched in some manner. over time, the whole area should fill-in with plants. if any of the assumptions are incorrect, please reply. and feel free to ask as many questions as you desire.
What is the UV protection?
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We add 10 year UV protection. That does not mean it falls apart in 10 years. HDPE is extremely stable, and especially at .5 inch thickness will be stable for many years past 10 years. In many applications, either the vegetation will cover the mats, or sediments will be intermittently covering the mats, so the sun will not have a degradation impact.