PRRIP Draft Environmental Impact Statement

• Description: DRAFT EIS for Platte River Recovery Implementation Program or PRRIP
• State: CO
• State: NE
• State: WY
• Basin: South Platte
• Water Division: 1
• Date: 12/1/2003
• Author: U.S Department of the Interior Bureau of Reclamation U.S. Fish and Wildlife Service
• Title: Platte River Recovery Implementation Program ‎(PRRIP)‎ Draft Environmental Impact Statement
• Water Supply Pro - Doc Type: EIS

FIGURES
Page
1 -1
Platte tri -basin map with each subbasin colored ............................ follows 1 -4
1 -2
The four target species listed as endangered or threatened in the Platte River
Basin under the Endangered Species Act .. ...............................
1 -5
1 -3
Program planning and NEPA process ........ ...............................
1 -22
2 -1
Central Platte map with critical habitat for whooping cranes and piping
plovers, and Central and Lower Platte Habitat Areas ...................... follows
2 -2
2 -2
Whooping crane use of channel areas of various widths versus
availability of channel areas of varying width .............................
2 -8
2 -3
Schematic of typical wet meadow complex along the Central Platte River ..........
2 -11
2 -4
The Platte River opposite Platte City (near present -day Cozad,
Nebraska), October 1866 .............. ...............................
2 -13
2 -5
North Platte Subbasin ................. ............................... follows 2 -14
2 -6
South Platte Subbasin ................. ............................... follows 2 -14
2 -7
Central Platte Subbasin ................ ............................... follows 2 -14
2 -8
Cumulative usable storage in the reservoirs in the Basin ........................
2 -16
2 -9
Median mean daily flow in the Platte River at Duncan, Nebraska,
in 1895 -1909 versus 1975 -1998 ......... ...............................
2 -23
2 -10
Magnitude and timing of peak mean daily flows at Overton, Nebraska .............
2 -25
2 -11
Mean annual sediment loads over time and distance along the Platte River .........
2 -32
2 -12
Central Platte schematic displaying average annual flow ........................
2 -33
2 -13
Property survey map of Dawson County, Nebraska, in 1904, showing river
widths of approximately 1 mile ......... ...............................
2 -36
2 -14
Widths of the Central Platte River at six time periods ..........................
2 -37
2 -15
Central Platte River channel near Overton, Nebraska, in 1860, 1889, and 1904 ......
2 -38
2 -16
Central Platte River channel near Overton, Nebraska, in 1938, 1951, and 1998 ......
2 -38
2 -17
The stage (water surface elevation) of riverflows in the North Platte River
at North Platte, Nebraska, has been increasing over time for the same
volumeof flow ...................... ...............................
2 -41
2 -18
Land cover changes within the Central Platte River near Kearney, Nebraska ........
2 -45
3 -1
The Present Condition median riverflows at Grand Island, Nebraska, and
flows under the Governance Committee Alternative, compared to
Service Species and annual pulse flow targets .............................
3 -17
3 -2
Water elements map for Governance Committee Alternative ................. follows 3 -22
3 -3
Addressing scientific uncertainty as part of a cooperative Program ................
3 -24
3 -4
Illustration of land cover type changes resulting from habitat restoration ...........
3 -36
3 -5
A schematic drawing of an area along the river that was previously
wet meadow, but now is drier shrubs and woodlands .......................
3 -37
3 -6
Flexibility in land management ............. ...............................
3 -39
3 -7
Options for increasing the Program's capacity to move water to the
habitat area ......................... ...............................
3 -40
3 -8
Potential methods for increasing program capacity to create short-
duration high flows near bankfull in the Central Platte Habitat Area ...........
3 -41
3 -9
Methods for increasing open view and offsetting erosion in the channel ............
3 -46
xiv
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