Kashinka Hollow is a tributary of East Branch Briar Creek in Columbia County, Pennsylvania, in the United States. It is approximately long and flows through Briar Creek Township. Its watershed has an area of . The median pH of the stream is 7.565. It has the lowest visual assessment score of any stream in the Briar Creek watershed. The stream's watershed lies over limestone, shale, siltstone, and mudstone. Trout inhabit Kashinka Hollow. Course Kashinka Hollow begins half a mile northwest of the community of Summer Hill in Briar Creek Township. It flows west for several tenths of a mile before turning south and flowing into a valley for more than a mile. In the valley, the stream flows parallel to Kachinka Hollow Road. Upon exiting the valley, it continues south for a short distance before turning southwest near Martzville. The stream then turns south again and shortly afterwards reaches its confluence with East Branch Briar Creek. Kashinka Hollow joins East Branch Briar Creek upstream of its mouth. Hydrology The discharge of Kashinka Hollow ranges from 0.12 to 41.2 cubic feet per second. The median discharge is 2.325 cubic feet per second. The water temperature of the stream ranges from to , with a median of . The stream's highest temperature is the highest recorded water temperature of any stream in the watershed of Briar Creek. The electric conductance of the stream's waters ranges from 88 to 301 milli-siemens, with a median of 147 milli-siemens. The pH of Kashinka Hollow ranges between 7.14 and 8.73. The median pH of the stream is 7.565. The minimum concentration of total dissolved solids is 34 parts per million and the maximum concentration is 86 parts per million. The median concentration is 43.5 parts per million. In a visual assessment by the Briar Creek Association for Watershed Solutions, Kashinka Hollow was given a score of 3.4 (the lowest in the Briar Creek watershed) on a scale of 1 to 10. It scored best (10 on a scale of 1 to 10) on fish barriers and it scored worst (1 on a scale of 1 to 10) on streambank stability, riparian buffering, and canopy coverage. Of ten sites in the Briar Creek watershed, this location has a priority rank of 1. Kashinka Hollow sometimes has high levels of lead and nitrates. Geography and geology The mouth of Kashinka Hollow has an elevation of above sea level.