Although total impervious area (TIA) is often used as an indicator of urban disturbance, recent studies suggest that the subset of impervious surfaces that route stormwater runoff directly to streams via stormwater pipes, called directly connected impervious area (DCIA), may be a superior predictor of stream ecosystem alteration.  In the Shepherd Creek catchment, a 1.85-km² (457-acre) basin in Cincinnati, Ohio, we used publicly-available GIS data along with on-site assessments to directly assess TIA and DCIA.  Impervious and semi-impervious area comprised 13.1% of the catchment area, with 56.3% of the impervious area connected.  The proportion of TIA that was DCIA varied widely across parcels, suggesting that estimating DCIA based on TIA, a typical method of calculating DCIA, does not adequately represent spatial variation in DCIA.  A higher proportion of TIA was on private land compared to public land (70.5% private vs. 29.5% public), with buildings and driveways comprising a combined 52.2% TIA; therefore, private land was initially targeted for stormwater best management practices (BMPs) in the form of rain gardens and rain barrels.  This data will be used to model impacts of stormwater BMPs on hydrology and predict in-stream improvements subsequent to stormwater retrofitting.