Slyh Run is a very confusing area since it looks like the city of Columbus & ODOT have culverted several streams and combined them. Slyh Run actually goes through the ODOT Right of Way (recently converted to a wet pond at Broadway and was previously a dry basin with a concrete gutter). Then the stream is culverted because of the 315 and the hospital. It re-enters as a stream at the Ohio Health Property (and is very ditch-like with a very narrow riparian area).
Click the link to see the location of two sampling points (A & B). Scroll down for a chart of sampling results.
In 2018 a restoration project was initiated in the vicinity of Cranbrook Elementary School, using a series of stream inserts to slow down water flow. The Cranbrook Elementary Stream Insert Project was made possible thanks to donations from the Western Reserve Land Conservancy and assistance from Kurt Keljo of Franklin Soil and Water Conservation District.
Read more here: Restoring Slyh Run - FLOW newsletter Fall 2018, pg 2
Left: details of the stream insert plan. Above: perfecting the design when high water flow created the need for repairs.
Macroinvertebrate sampling data