Wabash-Maumee-Field
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Wabash – Maumee Connection Site Visit Field Report Prepared For U.S. Environmental Protection Agency Great Lakes National Program Office Submitted by Tetra Tech EM Inc. 1 South Wacker Drive, 37th Floor Chicago, IL 60606 July 27, 2010 1 Table of Contents 1.0 INTRODUCTION ........................................................................................................................ 1 1.1 BACKGROUND ................................................................................................................................... 1 1.2 PURPOSE .......................................................................................................................................... 1 2.0 MEETING SUMMARY ................................................................................................................ 3 2.1 PRELIMINARY GREAT LAKES INTER‐BASIN CONNECTIONS RISK CHARACTERIZATION ....................................... 3 2.2 WABASH/MAUMEE CONNECTION DISCUSSION ...................................................................................... 3 3.0 SITE VISIT .................................................................................................................................. 6 3.1 EAGLE MARSH SITE VISIT .................................................................................................................... 6 3.2 HOMESTEAD SITE VISIT ....................................................................................................................... 6 3.3 HUNTINGTON DAM SITE VISIT ............................................................................................................. 6 4.0 CLOSING SESSION ..................................................................................................................... 8 Appendices Appendix A Attendee List Appendix B Photo Log Appendix C Slide Presentation i Wabash – Maumee Connection Site Visit Field Report July 27, 2010 1.0 Introduction The U.S. EPA Great Lakes National Program Office (GLNPO) requested the support of Tetra Tech, EM Inc. for a meeting and field visit to assess the floodplain areas between the Wabash and Maumee Rivers in Fort Wayne, Indiana on Friday, July 09, 2010. 1.1 Background Asian carp are a family of aquatic invasive species (AIS) brought over from Asia. Of primary concern are the Silver and Bighead carp which have been expanding their habitats within the Mississippi River basin for at least the past twenty years where they have decimated native fish populations by as much as 97 percent in some areas. These fish are currently threatening to enter the Great Lakes, a valuable fresh water resource. Asian carp have been known to exist within the Wabash River for nearly 20 years. However, in May 2010 Indiana DNR observed Asian Carp eggs and spawning behavior much further upstream on the Wabash than was previously anticipated. Therefore, documented evidence exists that they have been able to expand their range upstream from the Mississippi River basin. The Wabash River was a “dead‐ end” for these fish as the Roush Dam prevents Asian carp from reaching the headwaters of the Wabash River. However, the Little River connects to the Wabash below the dam and its headwaters ebb into marshland on the southwestern edge of Fort Wayne, Indiana. Due to its proximity to the Maumee River system and recent flood events that have occurred within the floodplains between these two systems, there may be an opportunity for Asian carp to swim across the drainage divide at this location between the Great Lakes and the Mississippi River Basins. See Figures 1 and 2 respectively for site location overview and known Asian carp presence. This is a critical concern because the Maumee River flows into Lake Erie, thus providing Asian carp with a potential for direct access to the Great Lakes. 1.2 Purpose Coordinating stakeholder agencies met on Friday, July 09, 2010 at Eagle Marsh in Fort Wayne, Indiana to discuss this potential surface water connection spanning the drainage divide between the Little River and the Maumee River. Detailed maps and hydrology data were posted to a common web site to allow stakeholder agency representatives to evaluate relevant data prior to the meeting and site visit at Eagle Marsh. The site visit was considered necessary to allow stakeholder agencies to be able to put the hydrology data and mapping into perspective and better assess the risks associated with this potential surface water connection. The purpose of this report is to provide a detailed summary of events, attendee list, and relevant photos to all stakeholder agencies and those unable to attend the meeting. 1 Wabash – Maumee Connection Site Visit Field Report July 27, 2010 Figure 1. Wabash – Maumee Connection Site Overview Figure 2. Wabash River Asian Carp Sightings 2 Wabash – Maumee Connection Site Visit Field Report July 27, 2010 2.0 Meeting Summary This meeting was convened by the Indiana Department of Natural Resources (InDNR) in the interest of agency collaboration in dealing with Asian carp and the efforts to keep them from entering the Great Lakes. Representatives from Allen County Soil and Water Conservation District (SWCD), Indiana Department of Natural Resources (InDNR), Little River Wetlands Project (LRWP), Maumee River Basin Commission (MRBC), U. S. Department of Agriculture Natural Resource Conservation Service (NRCS), U.S. Geological Survey (USGS), U.S. Army Corps of Engineers (USACE), and U.S. Environmental Protection Agency (USEPA) Great Lakes National Program Office met and reviewed results of 2009 Flood Insurance Survey along with various maps, aerial photos, and charts relevant to the backflow of water from the Maumee River Basin into the Wabash River Basin during flooding events. See attached attendee list for complete contact list of those in attendance. All attendees were in agreement for the need to have comprehensive stakeholder collaboration and consensus on a solution. 2.1 Preliminary Great Lakes Interbasin Connections Risk Characterization The USACE representative notified the stakeholders about a very short‐term study to identify and characterize all potential surface water connections between the Great Lakes and the Mississippi River Basins relative to the potential for transfer of AIS as part of the more comprehensive Great Lakes and Mississippi River Basin Inter‐basin Study (GLMRIS). It was stated that the immediate goal of the short‐ term study is to identify all connections into and out of the Great Lakes Basin, similar to this Wabash/Maumee connection where AIS could possibly cross the drainage divide between the basins. The USACE representative indicated that this will be a very fast‐track effort to expeditiously produce a reconnaissance level report by the end of September 2010 that provides a relative risk characterization of all potential surface water connection s between the Great Lakes and Mississippi River Basins. He indicated that the plan for this limited study is for the best local experts within the Corps and other federal, state, and local resource agencies to use currently available hydrologic data to assign a relative risk to the nature of the surface water connection, and use published information and local knowledge on AIS to assign a relative risk related to the transfer of AIS of concern at each location. USACE also explained that the information recently put together at Fort Wayne regarding the surface water connection and the proximity of Asian carp will likely put Fort Wayne near or at the top of the list, and that at potential high risk sites like this one, the Asian Carp Regional Coordinating Committee (ACRCC) is looking to USACE and others to find ways to fast‐track solutions. 2.2 Wabash/Maumee Connection Discussion InDNR led a comprehensive review and presentation of available Hydrology information from 2009 Flood Insurance Study (FIS), including mapping, aerial photos, and charts that define the nature of the 3 Wabash – Maumee Connection Site Visit Field Report July 27, 2010 hydraulic connection (See attached slides). The GIS maps show the flood plains in the area where there is possible connection between the Wabash and Maumee Rivers during flood events. They indicated that it appears flow occurs across the boundary associated with a 10‐year frequency storm event and that the field trip to the Marsh would allow observations of evidence of annual high water levels and perspective on the broad wetland connection. The charts indicated that at Eagle Marsh, the 1% frequency storm elevation is 755.6 ft mean sea level (MSL), and Light Detection and Ranging (LiDAR) mapping indicated perennial water elevation in the marsh pond is approximately 749.0 MSL. Additionally, gauge data showed the number of times in the past years when the levels were above the storm elevations and overland flow may have occurred. Significant discussion occurred regarding the water elevation in the Marsh necessary to provide conditions for Asian carp to swim across the divide. USGS indicated general consensus among their experts that a 10% frequency event would allow for sufficient water depths where Asian carp could swim through this connection. However, they expressed concern with the level of sophistication in the modeling used to support the d2009 FIS an noted that a two‐dimensional model as well as an unsteady model would be helpful to support an accurate estimate of the water elevation in the Marsh necessary to provide conditions for Asian carp to swim across the divide and to support design of a barrier