ISCO Aquatic Life Passage


Nominal Pipe Diameter (internal) Inches Ring Stiffness Classifications RSC Profile Type Pipe OD Inches; Estimated Lbs./pipe
24 100 A.L.P. 28.72 366
160 A.L.P. 28.72 366
30 100 A.L.P. 34.72 446
160 A.L.P. 34.72 446
36 100 A.L.P. 40.72 526
160 A.L.P. 40.72 526
42 100 A.L.P. 46.72 606
160 A.L.P. 46.72 771
48 100 A.L.P. 52.96 738
160 A.L.P. 53.12 995
54 100 A.L.P. 58.96 975
160 A.L.P. 59.20 1309
60 100 A.L.P. 65.12 1227
160 A.L.P. 65.35 1616
66 100 A.L.P. 71.75 1415
160 A.L.P. 71.75 1996
72 100 A.L.P. 77.75 1719
160 A.L.P. 77.75 2412
84 100 A.L.P. 89.75 2419
160 A.L.P. 90.22 3530
96 100 A.L.P. 101.91 3383

For many years fish and other aquatic organisms have migrated through culverts made with corrugated metal pipe (CMP). Installed as long as 50 years ago, many CMP culverts are so significantly rusted and near failure that water and fish have trouble effectively getting from one end to the other. A “fish friendly” solution to these failing culverts that is economically feasible, quickly installed and non-disruptive to the motoring public is imperative. Relining these culverts has always been a possible and popular solution. However, most high density polyethylene (HDPE) pipes have a smooth interior wall. The smooth wall has an extremely low resistance to flow, therefore increasing water velocity and making it difficult for fish and other aquatic organisms to pass through. Snap-Tite now offers an interior open profiled HDPE pipe designed to enhance aquatic life passage.

ISCO STORM A.L.P.’s internal structure is comparable to that of CMP, but manufactured with a more durable material. Fish and other aquatic organisms now can migrate more easily through their physical environment but with a pipe constructed of HDPE, offering a much longer service life. The interior profiles act as “roughness elements” that decrease the flow velocity and allow for some silt and stream bed material to collect inside. Additionally, Snap-Tite can install available baffles to solve depth and velocity problems within a culvert during flow extremes.

In low flow situations, most baffles act as weirs to create small pools of standing water. As the flow increases, the water rises up over the baffles. The baffles help decrease flow velocity while creating resting areas for fish to use during high velocity water flow occurrences. The Snap-Tite Group is your source for effective, efficient and permanent culvert rehabilitation. With culvert rehab experts across the country, more than 20 years of experience and literally thousands of culvert rehab project completed, Snap-Tite can help you determine the most cost effective solution for your culvert project. More information listed in the downloads section