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23-28 rollsi of color slide film to photograph the 871 miles of river <br />bottomland areas delineated in the Green, Yampa, White, Colorado, and Gunnison <br />rivers. <br />A list identifying the location of each bottomland habitat site was <br />formulated from the aerial 35-mm color slides and color infrared photographs. <br />All slides shot per photo session were meticulously cataloged according to <br />film roll number and slide sequence number, date, river, river mile, and river <br />location, and then stored in slide holders and binders for future reference. <br />Once the color slides were organized by river and river mile, they were <br />vilwed to identify and locate specific bottomland areas of potential <br />endangered fish habitat. The bottomland areas on these slides were then <br />computer digitized or overlaid with a transparent area grid to estimate <br />flooded acreage. Estimates of area were within ±10%. <br />--------------------- <br />Ro11s=f (R 1v.Mio. ( 8Drainage.)x( 36Phot s)J=24Rolls(36Exposure) <br />Classification of Bottomlands <br />Ten categories of information were used in cataloging, categorizing, and <br />prioritizing bottomland habitats in the Upper Colorado River Basin. These <br />parameters included (see Appendix E): <br />1. Basin, sub-basin, river <br />2. Bottomland Location: site, river mile, township, range, section <br />3. Runoff (May and June) <br />a. Total potential (historical) inundated area in acres and <br />hectares; the total area that could be potentially flooded <br />during historic or the pre-water development era <br />Note: the 100-year floodplain was used to estimate the <br />historical inundated area <br />b. Inundated (yes/no) <br />c. Total inundated area (acres/hectares); the actual or <br />realistic area flooded <br />d. Hydrological connection to mainstem river <br />1) yes/no <br />2) number of connections <br />3) connections up- or downstream <br />4) other water sources (groundwater, gravity feed, <br />tributary/stream) <br />4. Post-runoff (September) <br />a. Total potential (historical) inundated area in acres and <br />hectares <br />Note: the 100-year floodplain was used to estimate the <br />6