Missouri River Bed Degradation Integrated Feasibility Study and Environmental Impact Statement

Transcription

1 Pubic Scoping Meeting Missouri River Bed Degradation Integrated Feasibility Study and Environmental Impact Statement Jesse Granet Environmental Resources Specialist Kansas City, MO March 11, 2014 US Army Corps of Engineers

2 Study Authority Section 216 of Flood Control Act of 1970 Review of completed projects that physical or economic conditions have changed Bank Stabilization Navigation Project is currently being evaluated as completed project Cost shared 50/50 with Corps and Mid- America Regional Council (MARC) 2

3 Project Partners BSNP Railway Company City of North Kansas City/North Kansas City Levee District City of Parkville, Missouri City of Riverside, Missouri Fairfax Drainage District Holliday Sand & Gravel Independence Water, Missouri Kansas City, Kansas, Board of Public Utilities Kansas City, Missouri, Water Services Kansas City, Missouri, Water Supply 3

4 Project Partners Kansas Water Office Kaw Valley Drainage District KCP&L Leavenworth, Kansas, Water Department Mid-America Regional Council Missouri Department of Transportation (MoDOT) Platte County Village of Farley/Levee District at Farley WaterOne of Johnson County 4

5 What is Public Scoping? Conducted when project is in early phases of planning Share information about a project Gain public input Opportunity to review draft feasibility study and environmental impact statement in approximately 1.5 years 5

6 A Significant Resource The Missouri River is an important resource to the Nation Congressionally-authorized purposes: Flood control, water supply, navigation, water quality, irrigation, recreation, hydropower, and fish and wildlife 6

7 Modifications to the Missouri River Bank Stabilization and Navigation Project (BSNP) Mainstem Reservoir System 7

8 What is Bed Degradation? Erosion of the river bed Lowers water surface Rate of erosion increased in early 1990 s To date, some locations of the have already degraded up to 10 feet 8

9 Impacts of Bed Degradation? Between 1987 and 2011, 4.8 billion cubic feet of bed loss from St Joseph and Waverly, Missouri Preliminary estimate over next 50 years 8 to 10 additional feet on average, with some locations up to 20 feet or more 9

10 Bank Stabilization and Navigation Project Provides a 9-foot deep, 300-foot wide navigation channel Extends 735 miles Training structures Self scouring channel 10

11 Effects of BSNP to Indian Cave Bend North of Rulo, Nebraska Photo Series 1934 through

12 12 9 Nov 1934

13 19 Jun 1935

14 5 Oct 1935

15 19 Aug 1936

16 23 May 1946

17 1965

18 4 Nov 2003

19 Water Supply WaterOne Intake Structures 19

20 Flood Risk Management Line Creek, Platte County Missouri 20

21 Outfall Structures 21

22 Bridges 22

23 Groundwater Wells Parkville, Platte County, Missouri 23

24 Fish and Wildlife Habitat Dalbey Bottoms, Atchison County, Kansas 24

25 Examples of Affected Infrastructure 25

26 Impacts of Bed Degradation? More than $100 million has been spent since 1990 in response to degradation Preliminary estimates show that additional $360 million will be spent over next 50 years if degradation is not addressed 26

27 Preliminary Study Area Preliminary Study Area 27

28 Refined Study Area Refined Study Area 28

29 Causes of Degradation Confined channel Bank Stabilization and Navigation Project (BSNP) & levees Commercial dredging sand and gravel for construction Reduced sediment BSNP and Mainstem Reservoir System 29

30 Commercial Dredging Regulated under Clean Water Act Section 404 and Section 10 of River and Harbors Act Eliminating or reducing dredging would reduce but not stop degradation Each of the alternatives will be evaluated under different dredging scenarios 30

31 Mainstem Reservoir System Authorized to provide for flood risk management, water supply, navigation, water quality, irrigation, recreation, hydropower, and fish and wildlife Reservoirs trap sediment Study will not result in any changes to operation manuals for Mainstem Reservoir System 31

32 Potential Ways to Address Bed Degradation Lower Bank Stabilization and Navigation Project structures Mechanically widen the channel Construct grade control within channel 32

33 Lowering/Widening Scenarios Sills to lower Dikes to lower Excavated areas 33

34 Grade Control Current Water Level Up Stream Current River Bed Down Stream 34

35 Grade Control New Water Level Up Stream Grade Control Structures Down Stream 35

36 BSNP Modification 36

37 BSNP Modification & Channel Widening 37

38 Grade Control Structures 38

39 BSNP Modifications & Grade Control Structures 39

40 Grade Control, BSNP Modifications, & Channel Widening 40

41 Evaluation 41

42 Next Steps Determine ability and detailed cost to implement alternatives Refine Missouri River Mobile Bed Model Conduct economic benefit/cost analysis Evaluate environmental impacts of alternatives 42

43 Provide Your Input! 1) Provide comments during tonight's meeting on comment cards! 2) Electronically: Resources/Missouri-Riverbed-Degradation/Get-Involved.aspx 3) Mail comments: U.S. Army Corps of Engineers, Kansas City District c/o CENWK-PM-PR (Degradation Study) 601 E. 12th Street Kansas City, MO

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