North Fork of Indian Run: No Flow or a Raging Torrent?
Look at how dramatically the flow in the North Fork of Indian Run changes! Mid-summer, the well-developed stream bed is completely dry, but after 4” of rain it is a raging torrent. Even more surprising is that in summer, there is flow from the headwaters at Glacier Ridge Park to Coffman Rd, but the last 1.3mi are dry. It’s a mystery! Read on to find out!
The source waters of the North Fork of Indian Run are west of SR33 & Glacier Ridge Metro Park. There are two branches, Kile Ditch (south) and North Fork (north). Both branches start as farm-field ditches several miles west of Glacier Ridge Park. As they reach and cross Industrial Pkwy, the land is more developed with various large commercial operations, and development is increasing. At their junction, Kile Ditch drains an area of 1sqmi, and the North Fork drains 3.2sqmi (StreamStats). They join just downstream from the Glacier Ridge Bridge then flowing roughly parallel to Brand Rd through housing developments and several Dublin Parks: Westbury, Bristol Commons, and North Fork Indian Runs Park.
Along the way the stream is fed by some side streams (Bear Run) and storm sewers. The creek then veers south through the Woods of Indian Run and Coventry Woods Parks. It crosses Emeral Pkwy, and the Cardinal Health property, and joins the South Fork of Indian Run at Indian Run Falls Park, where the streams cascade down in a deep limestone ravine before joining the Scioto River just north of Dublin’s Bridge Park. Overall, the drainage area of the North Fork of Indian Run is 11sqmi, and the land is 55% developed with about 16% impervious surfaces and 11% forest (StreamStats).
THE BIG MYSTERY: Why is there no summer flow downstream from Coffman Rd and all the way to the junction with the South Fork, a stretch of about 1.3mi? Where does all the water go?
We first observed in January and February 2024, that North Fork was dry. At that time, there was construction work, stream bank stabilization ongoing at Bristol Commons and near Brandonway Dr. There were sandbags in the stream to facilitate this work. An inquiry with City of Dublin Engineers seemed to confirm that this was the cause of the dry streambed downstream, and that environmental impact studies had been done, and required OEPA permits had been obtained prior to the stream bank work. However, the construction was finished in July 2025, but the creek was still dry at Coventry Woods & Indian Woods Park.
To find out how and where the water vanished, we followed the North Fork from Coventry Woods, where the stream bed is well delineated, to near its headwaters. At Indian Woods Park, a large new bridge spans over the dry stream bed. Here, the forest shows clear indication that these woods are the natural floodplain of the North Fork, perhaps there even a wetland or seasonal vernal pools. An elevated sewer in the woods seem to indicate that there are some sewer lines below ground. Walking upstream in the dry creek bed we found “the hole” that drains the entire stream during summer flow. WHOA!
The bedrock around Indian Run is limestone and it is known that there are karst features forming underground caverns. So, it appears that with low to normal summer flow the North Fork of Indian Run “goes underground”, it vanishes in the underground karst caverns.
Back in July 2025, I suspected that there would be at least some flow after heavy rain. We had a lot of rain, about 4” from May 19-May 23, 2026 in the Dublin area. So, I was curious and we took a walk along the North Fork though Coventry Woods and the Woods on Indian Run after all the rain. We found a raging torrent of muddy water almost 30-40ft wide crashing through the woods.
Should I find this surprising? I know that urban streams have highly variable flow due to all the human-made changes and all the impervious surfaces. However, the drainage area of the North Fork of Indian Run is the least developed with the least percent of impervious surfaces compared to the streams in the southern part of the SWAG area which is100% developed and 40-50% impervious. Yes, I was surprised!
I am VERY curious to learn how much the streams in the SWAG area rise after strong rainstorms, and I am equally or even more curious, to learn how quickly or slowly the water recedes. If you are curious too, I encourage anybody who lives near a stream watershed to observe and take photos during a dry spell and after heavy rainstorms. Let us know, email [email protected] and share your observations.
Water Quality in the North Fork of Indian Run
As a watershed group we are interested in learning about the water quality in the streams in our area.
Given the huge change between completely dry and ragging torrent in the lower reaches of the stream, the habitat for aquatic life must have low quality. Macroinvertebrates cannot live there if the stream is completely dry. So we would expect to find a very low score based on macroinvertebrate water quality scoring. Nevertheless, it would be interesting to evaluate the habitat upstream of Coffman Rd.
In July 2025, we scored the habitat at Oak Meadows Drive using the citizen Qualitative habitat Evaluation Index (cQHEI). We found a straight ditch with predominantly silty, mucky substrate, in a suburban development. There was significant flow, fairly deep ponds and one apparently artificial rifle, with only a few trees and shrubs in a narrow riparian area. To our surprise, we saw a 12” big fish – carp? We assigned a low total cQHEI score of 49. The water was quite warm 85oF, very turbid (19”=14.4mg/l total dissolved solids TDS), had a conductivity of 770 and 120ppm Chloride. Not a pristine stream.
We plan to do further water quality studies along the North Fork of Indian Run in the future.