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

 

Stream & Riparian Restoration in the Cottonwood River Basin - Phase 2

The Kansas Water Office has received funding from the Kansas Water Pollution Control Revolving Fund (KWPCRF) to address sedimentation in the Cottonwood-Neosho River Basin. In working with The Watershed Institute a 9,781 feet reach of the Cottonwood River has been identified 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.

The Kansas Water Office issued an Invitation for Bids for 11 streambank stabilization sites on the Cottonwood River in Lyon County, KS (Phase 2). 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 below.

Once bids were submitted and reviewed it was deemed that 8 of the 11 sites could be funded. The sites to be completed by spring of 2015 are Reach 2: Sites 9, 12/54, 13, 14, 17, 18 and 56 and Reach 3: Site 23. 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)

Hot Spot
Site ID
Estimated Bank
Length (Feet)
Estimated Sediment
Reduction (Tons/Year)
9 949 807
12 1,232 2,652
13 1,228 3,022
14 859 1,340
15 614 2,862
16 521 486
17 1,545 3,802
18 968 1,836
23 637 3,773
54 685 729
56 85 67
62 102 67
63 62 31
64 160 123
65 134 115
Total 9,781 21,712

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

     Permit Conditions - Kansas Department of Agriculture, Division of Water Resources
    Permit Conditions - U.S. Army Corps of Engineers
    Permit Conditions - Kansas Department of Wildlife, Parks & Tourism - Action Permit

  

Site #9 Site #12-54 Site #13 Site #14 Site #15 Site #16
Specifications & Plans
Final Report
As Built Drawings
Specifications & Plans Specifications & Plans Specifications & Plans Specifications & Plans Specifications & Plans
Site #17 Site #18 Site #23 Site #56 Site #62-65
Specifications & Plans
Specifications & Plans Specifications & Plans Specifications & Plans Specifications & Plans  

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

Site #9 Site #12-54 Site #13 Site #14 Site #15 Site #16
Pre-Construction
During Construction
Photos
Photos 7/24/2012; 7/25/2015
Photos 2/2/2015
Photos 7/24/2012 Photos 5/8/2012; 7/17/2012; 10/29/2014; 11/4/2014    
Site #17 Site #18 Site #23 Site #56 Site #62-65  
Pre-Construction
Photos
    Pre-Construction    

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 15 "hotspots" located along the 9,781 feet stretch of the Cottonwood River is estimated to contribute 21,712 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 Luttjohann, KWO, at 785.296.3185 or bobbi.luttjohann@kwo.ks.gov