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Stream & Riparian Restoration in the Cottonwood River Basin - Phase 1

The Flint Hills Resource and Development Area, Inc. (Flint Hills RC&D) has received funding from the Kansas Water Pollution Control Revolving Fund (KWPCRF) to address sedimentation in the Cottonwood-Neosho River Basin. Working with the Kansas Water Office and The Watershed Institute, the Flint Hills RC&D has identified a 9,625 feet reach of the Cottonwood River as a high priority area for streambank stabilization to reduce sedimentation. Restoration of the riparian buffer adjacent to the stream is also a goal of this project.

Flint Hills RC&D, in partnership with the Kansas Water Office issued an Invitation for Bids for 14 streambank stabilization sites on the Cottonwood River in Lyon County, KS (Phase 1). Sites are grouped into separate bid packages. The closing date for bid submissions was June 16, 2014. All project site plans and specifications are available for review at: http://www.kwo.org/projects_programs/Cottonwood_Streambank.htm and the complete bid package can be obtained on CD by contacting the Kansas Water Office at 785-296-3185.  Invitation For Bid (IFB) is located here Contract Amendment Phase I.

Once bids were submitted and reviewed it was deemed that 9 of the 14 sites could be funded. The sites to be completed by spring of 2015 are Group 1: Sites 2, 3, 4 and 41 and Group 2: Sites 6, 42, 44, 45 and 46. The remaining sites hope to be completed with future funding.

For additional information about this project, contact:

Kansas Water Office
Attention: Bobbi Luttjohann
900 SW Jackson Street, Suite 404
Topeka, KS 66612
(785) 296-3185

Bobbi.Luttjohann@kwo.ks.gov
(Map - Project Locations) pdf graphic

Hot Spot
Site ID
Estimated Bank
Length (Feet)
Estimated Sediment
 Reduction (Tons/Year)
2 340 863
3 740 1800
4 215 2687
5 1255 3124
6 635 1531
7 1265 3108
41 775 1207
42 470 169
44 570 768
45 1065 1601
46 525 1373
47 795 872
48 550 774
49 425 1442
TOTAL 9,625 21,319

Below are construction drawings and specifications for each project site. For permit conditions see list below:

Site #2 Site #3 Site #4 Site #5
Specifications & Plans Specifications & Plans Specifications & Plans Specifications & Plans
Site #6 Site #7 Site #41 Site #42
Specifications & Plans Specifications & Plans Specifications & Plans Specifications & Plans
Site #44 Site #45 Site #46 Site #47
Specifications & Plans Specifications & Plans Specifications & Plans
Specifications & Plans
Site #48 Site #49    
Specifications & Plans Specifications & Plans    

To view photos of the stream and bank conditions during and after construction, make your selection below.

Site #2 Site #3 Site #4 Site #5
Photos 5/31/12; 10/29/14; 11/4/14; 11/10/14 During Construction
Photos 5/31/12; 8/21/14; 9/8/14; 9/12/14; 9/23/14; 9/29/14
Photos 5/24/12  
Site #6 Site #7 Site #41 Site #42
    Photos 5/24/12; 5/30/12; 10/6/14; 10/8/14; 10/22/14; 10/29/14; 11/3/14; 11/4/14; 11/10/14  
Site #44 Site #45 Site #46 Site #47
       
Site #48 Site #49    
       

John Redmond Reservoir and Upper Cottonwood-Neosho Watershed

John Redmond Reservoir was under construction from 1959-1964 for the purposes of flood control, water supply, water quality and recreation. The reservoir is located on the Neosho River, and drains 3,000 square miles of mostly grass and cultivated land. The Kansas Department of Health and Environment (KDHE) has identified impairments to ecosystem quality because of excessive sediment and nutrient loading into the reservoir.

Sediment transport and stability of streambanks were characterized by the United States Geological Survey (USGS) and The Watershed Institute (TWI). The USGS estimates sediment transport to John Redmond Reservoir during an approximately average year of streamflow is 1.12 million tons of sediment. TWI classified the riparian area and assessed the stability of stream channels upstream from John Redmond Reservoir. This study estimated annual erosion rates from surveys at representative channel locations, as well as characterizing "hotspots" of channel erosion based on aerial photography.

Using average streambank erosion rates estimated by TWI, an estimated 162,800 tons of sediment are transported from the 210 miles of the mainstem Cottonwood and Neosho Rivers annually. Streambank erosion from the 14 "hotspots" located along the 9,625 feet stretch of the Cottonwood River is estimated to contribute 21,319 tons per year. The Kansas Water Office is planning to implement streambank stabilization efforts in this reach to reduce sediment transport to John Redmond Reservoir.

Nonpoint Source (NPS) Project Management Plan

One of the requirements of obtaining the KWPCRF loan is the preparation and public review of a Nonpoint Source (NPS) Project Management Plan. A draft of the plan is provided here.  If you have comments or questions regarding the plan or project, contact Bobbi Wendt, KWO, at (785) 296-3185 or Bobbi.Wendt@kwo.ks.gov.

 

 

News:

Pre-Construction Meeting - August 18, 2014, 10:30 am, City of Emporia, 516 Mechanic Street, Conference Room 1AB.

Pre-Bid Meeting - June 9, 2014, 10:00 am, City of Emporia, 516 Mechanic Street, Conference Room, 1ab

Public Hearing - November 4, 2013, 10:00 am - Stream & Riparian Restoration on the Cottonwood River Nonpoint Source Project Management Plan Phase 1. City of Emporia, 516 Mechanic Street, Conference Room 1 A & B. - Press Release

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