Physical Feature Inventories are a record of the development of flood and erosion control structures over time. They also contain features such as diversion structures and irrigation return flow points.
- 2015 Inventory. This is the 2011 inventory with updates for Reed Point to Custer only, based on high-resolution 2015 aerial photos.
- 2011 Inventory. This is a revision of the 1999-2001 inventories, based on high-resolution 2011 aerial photos.
- 1999-2001 Inventories. This is a combination of an inventory of the river done from 1999 aerial photos of Park County and a field inventory of the remaining counties performed in 2001.
Historic Physical Feature Inventories