Turtle underpass, Hwy 69, Ontario, Canada. The turtle underpass is 2.4 m wide and 2.1 m high. There are separate structures for the two travel directions with a fenced opening (15.3 m) in the median. Painted turtle, snapping turtle and northern water snake have been documented using this type of structure along Hwy 69. The large mammal fence is 2.3 m high. Geotextile fabric (black) is attached to the large mammal fence for reptiles and amphibians. The fabric is 0.8 m above the ground and 0.2 m below the ground. A 0.1 m wide strip below the ground is oriented away from the road to reduce the probability that animals dig under the fabric. The underpass (box culvert) is believed to be suitable for turtles and snakes, but the geotextile fabric has gaps resulting from installation errors, erosion and flooding. A sturdier barrier (concrete/steel/hard plastic) with reduced maintenance and better oversight during installation is recommended.