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  River Studies
 Blue Creek flowing through canyonBlue Creek - Lisa Lynch, NPS **Eastern Wild and Scenic Rivers Study - Phase I** The Bureau of Outdoor Recreation (BOR), which was absorbed into the Heritage Conservation and Recreation Service (HCRS)  in 1977,  initiated the Eastern Wild and Scenic Rivers Study in 1976 in cooperation with state and local agencies. BOR southeast regional staff collected US Geological Survey (USGS) topographic maps (1:500,000) east of the Mississippi and identified free-flowing river segments 25 miles or longer. In some cases, rivers less than 25 miles in length were included if the rivers were thought to be regionally or nationally significant. Maps and lists of these rivers were sent to other eastern regional offices of BOR to identify segments of rivers impounded by dams or channelized, and to delete them from the list. BOR created a point system to assess development impacts within one-quarter mile of the rivers' banks. River segments having a cumulative point-per-mile total of 100 or more were deleted, as were most intermittent streams. BOR circulated the resulting list of rivers to Federal and state resource agencies, citizen groups, and individuals, for review and revision. Public meetings were held in each region and additional nominations and deletions were considered at that time. BOR staff flew over the river segments on the list and recorded them on videotape to evaluate cultural and water resource developments, scenic quality, and flow, and to delete ineligible segments. Following field and aerial evaluation, the revised list of segments was again circulated for review, and comments were used to prepare the final list of rivers. **Eastern Recreational Rivers Study - Phase II** Seventy-five percent of the rivers initially listed were deleted through the course of "Phase I" largely due to the amount of development within the river corridor. Some of these rivers were potentially eligible as recreational rivers as defined by the Wild and Scenic Rivers Act. In 1978, the Department of the Interior's Heritage Conservation and Recreation Service, the predecessor agency to BOR, surveyed thirteen states in the northeast for their opinions and ideas regarding the potential for an additional inventory of urban, cultural and recreational rivers. Nine states, five of which had their own wild and scenic river programs, responded with support for conducting the study. HCRS held a regional workshop in December, 1979, to coordinate collecting data for the study.
 Two small waterfalls flowing off leaf-covered boulders.NPS, Scott Teodorski **Western Wild and Scenic Rivers Study - Phase I**
While HCRS completed "Phase II" in the East, the agency started "Phase I" in the West. In January 1979, HCRS’s Northeast Regional Director suggested that HCRS could conduct a western rivers inventory that built upon the lessons learned from the eastern inventory. By April, general information and data sheets were mailed out to public and private sector officials soliciting them for their involvement in the western inventory. The western inventory used six steps, or filters, to conduct the inventory process, much like the eastern inventory:
 Length (segments greater than/equal to .5 miles)
Water Resource Development (rivers free of existing impoundments or other alterations such as channelization, straightening, dikes, and levees)
Cultural Development (a point system was used to grade projects found within 1⁄4 mile on each side of the river bank)
Input by Experts (the river list was circulated for comment)
Aerial Survey (approximately 20% of the total river mileage in each physiographic section was videotaped)
River Evaluation (a list of the top free-flowing segments for each physiographic region was developed) return to top
Western Recreational Rivers Study - Phase II
 Last updated: December 20, 2016
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