Dam newsletter. another. Ohio Dam Safety Organiza on Introduc on. President s Message. Ohio Dam Safety Organization 2018

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1 another Dam newsletter Ohio Dam Safety Organization 2018 HELP US CONTINUE OUR GREEN INITIATIVE - To receive this newsletter by , please send us an at Info@OhioDamSafety.org (please include your name and address). Ohio Dam Safety Organiza on Introduc on The Ohio Dam Safety Organization (ODSO) was formed in 1995 as a division of the Water Management Association of Ohio (WMAO). ODSO is also affiliated with the national Association of State Dam Safety Officials (ASDSO). Membership in ODSO is free and open to all who are members of WMAO. Our mission is to promote dam safety in Ohio by establishing a partnership between dam owners, operators, engineers and regulators. ODSO provides a forum for education and discussion on dam safety related issues. In addition, we provide a voice for concerns in the formation and implementation of dam safety policy at the State or Federal level. One important way we communicate dam safety news and topics of interest is through publication of Another Dam Newsletter. President s Message By Mike Rowland, ODSO President Welcome to another edition of the ODSO summer newsletter. First off, I would like to welcome our new board member Mr. Dan Murphy of AEP. Dan has been active in ODSO for a number of years but this is his first time joining the board. All current members of the board and the advisory council are presented later in this newsletter. On a related note, last year we lost Mr. Kent Leader. Kent had been serving as an interim board member representing Private Dam owners. He brought a fresh perspective to our organization during the short time he was with us, and he is sorely missed. To the right is a photo of Ken accepting the best maintained dam award on behalf of Sunrise Lake. ODSO will be hosting a HEC RAS 5.0 training class on November 27 th through 29 th at ODNR Fountain Square. HEC RAS 5.0 is the latest version of the Army Corps of Engineers Hydrologic Engineering Center s River Analysis Software, and is one of the more commonly used software packages for performing dam failure inundation studies. This new version of the software is capable of modeling the flood wave from a hypothetical dam break in two dimensions, which is frequently more representative of dams located in flatter topography. A more detailed description of the class, including cost is included in this newsletter. Attendance is limited to the first 30 participants to sign up. Speaking of inundation mapping, this is a good time to remember what took place late winter and early spring 2017 at the Oroville Dam in California. Although in the end, the dam did not fail and there was never an uncontrolled release of water, at the time this was not at all guaranteed and an evacuation was carried out in accordance with the dam s emergency action plan. Following the event, an independent forensic team was commissioned and their final report was released on January 5, A copy of the report may be found at the following URL: EnyYgPgf7_a_JIoK0N8J mze/view While it is certainly true that many aspects of the dam are unique to its massive size and location, there are a number of lessons that can be taken from the incident applicable to every dam. Among these are a lack of understanding of the original design and construction as it related to the failure mechanism, addressing problems in a superficial manner rather than attempting to understand and address the root cause, the lack of a full understanding of potential failure mode during an emergency condition, and an emphasis on compliance with regulations at a minimal 1

2 level rather than what might be considered best practices. If you have the time, I would recommend reading through the report and thinking about how the issues that the independent forensic team identified might apply to your own dam or dams that you work on. In wrapping up, I want to point out that this year s Water Management Association of Ohio (WMAO) conference will be held in conjunction with the 38 th International Symposium of the North American Lake Management Society (NALMS) at the Duke Energy Convention Center in Cincinnati. As a result, the WMAO conference will be pared back to a single day, October 31, However, we will still have our typical ODSO session on that day. I would encourage you to consider traveling to Cincinnati and attending both the WMAO and NALMS conference. More details may be found on the WMAO website, and I hope to see you there. Dam Modifica ons to Pass a Probable Maximum Flood By Joe Stock, Buckeye Engineering LEWIS CENTER, OHIO: The Lake Austin Dam in Toronto, Jefferson County, Ohio was built by The Cable Company of Canton, Ohio from 1940 to 1946 with mechanical D7 with cable driven blade, large shovel, pull behind scrapers, and compaction equipment. The lake's normal surface is 76 acres and the watershed (drainage area) to this lake is square miles. The lake is used by Austin Lake RV Park & Cabins for recreational purposes. Campground buildings are located immediately downstream of the dam, and further downstream are few occupied homes adjacent to the Town Fork stream channel. The dam has a Class I hazard classification as determined by ODNR, Dam Safety Engineering Program (ODNR). We evaluated the watershed hydrology and spillway hydraulics to determine required changes to the structure to pass a probable maximum flood (PMF) storm event, as required for Class I dams. The estimated inflow is 21,000 cubic feet per second to this lake. The design also included a geotechnical soils investigation across and below the earthen dam to evaluate the soils existing soils compaction and ground water conditions. The resulting design modifications required to pass the PMF included raising the earth dam about 36 inches, installing a 29 inch high concrete parapet wall across the top of the dam, and installing a 140 foot wide concrete emergency spillway channel. The emergency spillway had to be constructed across the dam since there was limited room to construct on either side of this dam. ODNR approved construction plans for Phase 1 in late Work for this phase included the installation of two concrete training walls at the primary spillway channel. The major materials included 123 cubic yards of reinforced concrete, ODOT Type C stone and clay from an off site borrow source. The contractor completed Phase 1 in Spring

3 ODNR approved construction plans for Phases 2 and 3 in Spring Work for these phases included the installation of a concrete training wall, concrete parapet wall and concrete emergency spillway channel. The major materials included 1450 cubic yards of reinforced concrete, sand, ODOT Type C stone and clay from an off site borrow source. The general contractor is James White Construction of Weirton WV. Their concrete subcontractors included Grae Con of Steubenville, and Whiteacre Engineering of Canton. The contractor has been working on the improvements since Fall The construction at the dam is near completion now. The disturbed areas still need to be hydroseeded to establish a grass cover, and a final record construction survey needs to be completed. Primary Spillway Weir, Gates and Outlet Channel with Rock Armoring along east Training Wall Small Emergency Spillway Channel, Concrete Cutoff wall with Rock Armoring along west Training Wall Second Emergency Spillway Channel Emergency Spillway Channel Entrance Parapet Wall across the western portion of the Dam Removable Stainless Steel Stoplog, to access the western side of Dam with Equipment 3

4 Levee Inspec ons in Ohio By Doug Evans, ODNR Division of Water Resources, Dam Safety Levees were first built in the United States more than 150 years ago. Farmers, traditionally drawn to the rich soils of floodplains, put many levees in place to protect agricultural areas from frequent flooding. Other levees were built to protect cities and other developed areas. Today, millions of people throughout the United States live or work in proximity to rivers, streams, or other waterways that are subject to flooding and protected by levees. Because numerous levees have been built by communities and individuals over the course of many decades with limited engineering involvement, it is unknown how many miles of levees truly exist in the United States, where they are located, what their condition is, or the possible consequences of their failure. It is important to note that levees are designed to reduce flood risk, but they do not eliminate the risk entirely. It is always possible that a flood will exceed the design capacity of a levee, no matter how well the structure is built. Levees are designed to manage a certain amount of floodwater and can be overtopped or fail during flood events exceeding the level for which they were designed. Levee failures can also be caused by structural failures resulting from improper designs or construction, poor maintenance, inadequate foundations, seismic activity, erosion, seepage, or burrowing animals. When a levee fails, the result can be more catastrophic than if the levee had never been constructed. By some estimates there are 100,000 thousand miles of levees in the United States. About 15,000 of those levee miles have had their condition assessed and their benefits and flood risks characterized. For another approximately 15,000 of those levee miles, some information is available, but the benefits and flood risks associated with these levees are unknown. However, for about 70,000 of those levee miles, information is limited or nonexistent. Summary of Levees in the United States In National Miles Owner/Operator Levee (est.) Database Federally authorized, USACE operated and Maintained Federally authorized, USACE constructed, locally operated and maintained Locally constructed, operated and maintained, but accepted into USACE Rehabilitation Program Levees identified from state inventories and FEMA mapping Other local or private Levees with limited or no information available Condition Assessed Benefits and Flood Risks Characterized 4,000 Yes Yes Yes 8,000 Yes Yes Yes 2,200 Yes Yes Yes ~15,000 Yes No No ~70,000 No No No In the aftermath of the levee failures during Hurricane Katrina in 2005, the U.S. Congress passed the National Levee Safety Act in It is a key element of the Water Resources Development Act of 2007 (Public Law ). This element sought the collection and documentation of basic information relative to federal levees. Though authorized by Congress, a National Levee Safety Program has not yet been implemented. However, the U.S. Army Corps of Engineers (USACE) is conducting an inventory and one time inspection and risk assessment of some of the nation s levees as both a precursor and a key component of a potential National Levee Safety Program, a program that envisions state levee safety programs that are complementary to current federal efforts. [See Title IX of the Water Resources Development Act of 2007, as amended by Section 3016 of the Water Resources Reform and Development Act of 2014 for a more complete understanding of this effort.] 4

5 The one time inspection and risk assessment of the nation s levees being conducted by USACE is similar to the collection of information about the nation s dams that helped to build the National Inventory of Dams. The process will be most successful with a coordinated federal, tribal, state and local effort. The National Levee Database (NLD) serves as the nation s repository for levee related data and contains information about many, but not all, of the nation s levees. While populating the NLD is an important outcome of the inventory effort, the real benefit is identifying the location, condition, benefits and flood risks associated with our nation s levees for both those that operate and maintain them, and those that work or live behind them. The Ohio Department of Natural Resources, Division of Water Resources is coordinating with the USACE to lead the levee inspections and risk assessments for Ohio. So far in 2018, inspections of levees in Mt. Vernon, Bremen, New Lexington, and Cambridge have been performed. An additional inspection at Lunken Airport near Cincinnati is scheduled for later this year. As more funds become available through Congress, more levee inspections and risk assessments will be performed in Ohio and across the nation. Dam Removal in Chagrin River By Joe Stock, Buckeye Engineering LEWIS CENTER, OHIO: The Ivex Lower Dam is located in the Village of Chagrin Falls, Cuyahoga County, Ohio. ODNR, Dam Safety Engineering Program (ODNR) regulated this Class I dam. Throughout this project, the owner has modified the Ivex Lower Dam in phases from January 2011 to May 2013, as a permit condition by the Ohio EPA. The work was performed under a USACE Nationwide permit. The height of dam was reduced below 10 feet, therefore it is now an Exempt classification by the state. The original dam was built in the 1840s as a mill dam. Since the Ivex Packaging paper mill closed in 2004, there was no longer the need for a water supply source. View looking downstream of the dam View of the Dam This modification resulted in the overall restoration of approximately 2,200 linear feet of stream and associated floodplain and also the creation of wildlife habitat. Modification of the dam and restoration of a natural stream channel in the drained lake bed will improve water quality by recreating natural stream flow, moderating water temperature, increasing aquatic and terrestrial habitat, and absorbing nutrient rich runoff. In Spring 2013, the contractor graded and seeded the disturbed areas. Some photos were taken in Summer 2013 to show the final conditions. Vegetation is now well established. ODNR reviewed and approved modifications in May 2014 and reduce the hazard classification to Exempt. 5

6 View of Restored River Bank In summary, the concrete dam located in the Chagrin River at Chagrin Falls has been modified in height to be Exempt from regulation by ODNR. The New Labyrinth Spillway at Indian Lake By Rob Kirkbride, P.E., Stantec History of the Original Spillway The original spillway was constructed in the mid 1850 s as a feeder lake for the Miami and Erie Canal system and created the Lewistown Reservoir (now known as Indian Lake). It is located in Logan County, Ohio near Russells Point. The lake and spillway are currently owned and managed by the Ohio Department of Natural Resources (ODNR) and used primarily for recreational purposes. The original spillway design used an ogee shaped weir with a total length of 700 feet and height of 10 feet (see Figures 1 and 2). Major rehabilitation of the spillway was performed in 1959 and 1972 with other repairs completed throughout its lifespan. Figure 1 - Original Spillway During Repairs in 1959 Figure 2 - Spillway Conditions in

7 Figure 3 - Conceptual 3D Isometric Model Showing the Labyrinth Spillway Design (Green middle section indicates lower crest) Design of the New Spillway After completion of the spillway condition evaluation, it was determined that rehabilitation of the existing spillway would be difficult due to the many years of overlays and patching that had been performed. Furthermore, the ODNR wanted to provide additional spillway capacity during significant storm events to improve their ability to manage flow conditions both upstream and downstream of the spillway. As with all spillway structure designs, the hydrology and hydraulics (H&H) are an important part of the final configuration. The H&H was further complicated due to the constriction of flow at the bridge structure immediately downstream of the spillway. The new Probable Maximum Flood (PMF) study that was approved for use by the ODNR in 2013 was also used. Additional goals included maintaining the lake pool level throughout construction so impacts to recreational activities were minimized. Numerous scenarios were evaluated to provide ODNR with solutions that met their goals. These solutions included 1) replacement of the original spillway with a similar ogee style configuration plus 800 additional feet of new spillway and raise the primary embankments several feet, 2) utilize roller compacted concrete (RCC) to create an emergency spillway, 3) install a new spillway with a 250 foot long gated spillway, or 4) replace the existing spillway with a labyrinth style spillway. Based on an evaluation of all the pros and cons for each alternative, the labyrinth style spillway was chosen (see Figure 3). Design of the new labyrinth spillway flow modeling was based on the Crookston method (2012). This method was modified for the special conditions at Indian Lake spillway, including the design requirement to maintain flow conditions up to the 100 year storm event. A two stage crest height was developed to meet this flow requirement. Design of the two stage spillway required an iterative process between reservoir elevation, tailwater submergence and the individual apex crest heights to develop a rating curve for the entire spillway system (see Figure 4). The new crest spillway elevation remained at Elevation (same as the original spillway crest), while the auxiliary spillway sections were designed at Elevation The spillway rating curve shows how the new labyrinth spillway mimics the existing spillway flow up to Elevation , which is equivalent to the 100 year storm event elevation. Once the flow reaches this elevation, the right and left auxiliary sections of the spillway are activated for passing flow. Note that the tailwater has a significant impact to the overall volume of flow that can be transferred downstream. 7

8 Figure 4 - Labyrinth Spillway Rating Curve Inundation mapping was developed to evaluate conditions upstream and downstream of the spillway. Adjustment of the labyrinth spillway crest elevation and the width of each cycle during design was necessary to produce optimal conditions. Mapping of the 1 year storm event up to the 100% Probable Maximum Flood (PFM) was performed. Based on site observations made just downstream of the existing spillway, the design included erosion protection to protect undermining of the spillway and erosion along the roadway. The use of Articulated Concrete Block (ACB) was used for this purpose. An additional benefit of the ACB installation was the long term ability to allow for vegetation management since equipment can traverse the surface. A 2 foot deep stilling basin was designed to minimize erosion potential downstream of the middle (service) portion of the spillway. The structural design of the spillway included a 2 foot thick reinforced concrete base slab with 18 inch thick reinforced concrete labyrinth walls. The concrete mix was specific for water control structures that minimized shrinkage but achieved the necessary design strength. A seepage cutoff wall, using sheetpiles, was designed at the upstream end of the spillway and connected to the abutments. A width of 40 feet was used for design of the labyrinth cycles. Figure 5 shows a cross section of the final design. Figure 5 - Cross Section of Labyrinth Spillway (Auxiliary Portion) 8

9 Construction Construction of the spillway began in February 2017 by C.J. Mahan Construction Company. Construction required that a minimum of 45 percent of the spillway remained open throughout construction to allow the flow to continue discharging from the lake to the downstream waterway. The contractor chose to use a sheetpile / aggregate cofferdam system to protect the work area up to the 100 percent PMF event (see Figure 6). Multiple weather events caused significant flow during construction which flooded portions of the work, but the cofferdam system performed well. Demolition of the original concrete spillway and abutments was primarily performed using a hydraulic jackhammer and large track hoes. Prior to placement of new concrete, the exposed ground surface was densified using vibratory compactors to minimize the potential of settlement. Dewatering continued throughout construction and allowed for placement of materials in the dry. Once the base slab was complete, the labyrinth walls were constructed using steel forms that were custom made for the project. Limiting the walls to two heights and similar configurations allowed for reuse of the steel forms. The service portion of the spillway walls included alternating dentates (3/4 and 1.5 chamfers) to mitigate low flow noise and vibration. Figure 6 - Aerial Photo Showing Approximate Mid-Point of Construction Installation of the Articulated Concrete Blocks (ACB s) was performed using a large crane to lower them into position. The ACB s provide scour protection downstream of the spillway and along the adjacent roadway. The labyrinth spillway was substantially completed and opened to the public in July Figure 7 shows the completed spillway looking downstream. Figure 7 - Labyrinth Spillway Looking Downstream (July 2018) 9

10 WMAO 2018 Annual Fall Conference By Sco Jerrome, Natural Resources Conserva on Service (NRCS) The WMAO Fall Conference will be held in conjunction with the 38 th International Symposium of the North American Lake Management Association (NALMA). The conference will be held October 30 November 2, 2018, at the Duke Energy Convention Center, 525 Elm Street, Cincinnati, Ohio. WMAO sessions will be held on October 31 st. This conference will allow you to explore what is happening in the management of Ohio s water resources. How do we minimize risks from floods, droughts, pollution; balance supply and demand; eliminate waste or loss? What projects have demonstrated success and technologies represent new approaches? The presentations will share insight on the issues, programs, and policies that result in meaningful change, provide solutions, improve accountability, encourage a systems approach, and promote sustainability and resiliency. Several presentations are being considered for the ODSO breakout session including: Two Birds with One Stone: Funding Flood Mitigation and Infrastructure Repair with FEMA HMGP Indian Lake Labyrinth Spillway Improving the Efficiency of a Historic Spillway The Green Monster: A Case Study on Earth Dam Landslides, Hidden Valley Lake Dam, Dearborn County, Indiana Plan to attend this conference and learn what is driving the change. Additional information about the conference and WMAO can be found at 10

11 ODSO Managing Board By Mike Rowland, ODSO President ODSO is governed by a Managing Board elected at our annual fall meeting. The Managing Board consists of one member representing each of the following seven areas of dam safety interest plus two at large positions. Academia Municipal Dam Owners Conservancy Districts Private Dam Owners Dam Construction Contractors At Large 1 Engineering Consultants At Large 2 Industrial Dam Owners Current Managing Board members include: President Mike Rowland, P.E. S&ME, Inc. Vice President Dan Pizzino, P.E. American Electric Power Secretary Lori Gillett Kokosing Industrial Boris Slogar, P.E. Muskingum Watershed Conservancy District Dan Murphy, P.E. American Electric Power Professor Halil Sezen Ohio State University Nick Mueller, P.E. Stantec The Managing Board is assisted in their duties by a non-voting Advisory Council. Advisory Council members: Rob Kirkbride, P.E. Doug Evans, P.E. Mark Ogden, P.E. Scott Jerrome Vacant Member Representation: Immediate Past President ODNR / Division of Water Resources / Dam Safety Program Association of State Dam Safety Officials (ASDSO) Natural Resources Conservation Service (NRCS) Ohio Emergency Management Agency (OEMA) Conservancy Districts Dam Construction Contractors Engineering Consultants Industrial Dam Owners Municipal Dam Owners At Large No. 1 At Large No. 2 Academia Private Dam Owners Boris Slogar, P.E. (Muskingum Watershed Conservancy District) Lori Gillett (Kokosing Industrial) Mike Rowland, P.E. (S&ME, Inc.) Dan Pizzino (American Electric Power) Currently Vacant Dan Murphy (American Electric Power) Nick Mueller (Stantec) Professor Halil Sezen (Ohio State University) Currently Vacant The Managing Board also has significant support from the following members: Mike Kennedy Barry Puskas Kevin Ernst Jeff Brooks DLZ Miami Conservancy District Terracon City of Columbus Additional information is available on our website at 11

12 Best Maintained Dam Awards Call for Nomina ons By Dan Pizzino - ODSO Awards Commi ee Congratulations to the winners of last year s ODSO Dam Safety Awards for Best Maintained Dam. The 2017 winners (by ownership category) recognized at the Annual Conference last November are: Privately Owned: Local Public: Moe Pond Dam (Col. Thomas N. Moe) Delphos Reservoir Dam (City of Delphos) Photos of these dams can be viewed at the ODSO web site: Click on Awards and then Best Maintained Dam Award. Nominations for the 2018 awards are now being sought. Eligibility is based on four requirements: (1) the dam must be at least five years old (or that it has been at least five years since the dam was rehabilitated); (2) repeat awards will be considered only if a new Ohio Department of Natural Resources (ODNR) inspection report has been issued subsequent to the previous award (or that it has been at least three years since the previous award); (3) the dam must be in compliance with all of the ODNR dam safety regulations, specifically that all the Required Remedial Measures identified in the latest ODNR inspection report have been implemented; and (4) owners of multiple dams may submit only one nomination for the current award year. The purpose of this awards program is to encourage proper ongoing maintenance of dams. Remember: Safe Dams Are Well Maintained Dams! The award is a handsome plaque featuring the name of the dam, and should be a proud addition on the wall of any owner s office or home. More importantly, winning this award means the dam owner is Saving Money! Annual maintenance costs have been shown to be only a fraction of the rehabilitation costs that will be necessary when maintenance is continually deferred. FEMA s Dam Owner s Guide to Plant Impact on Earthen Dams, for example, sets the annual mowing cost at only 4% of the cost for tree removal, clearing, and grubbing needed to restore a grass cover on the dam. Another example is the drain valve; it only takes a short time to exercise the valve occasionally, as opposed to the cost of hiring a contractor to repair or replace the valve after it has become frozen due to nonuse. This year s awards will be presented in conjunction with the Ohio Dam Safety Organization / Water Management Association of Ohio annual conference on October 31, 2018 in Cincinnati, Ohio. To make a nomination for this year s awards, fill out the form in this newsletter and return it by August 31, 2018 to: Dan Pizzino - ODSO Awards Committee Civil Engineering & Geotechnical Services American Electric Power Service Corporation 1 Riverside Plaza 22 nd Floor Columbus, OH Phone: e mail: dwpizzino@aep.com 12

13 ODSO Nomina on Commi ee News By Mike Rowland, ODSO President, Chair - Nomina on Commi ee The ODSO leadership is comprised of a nine person board composed of representatives from diverse interest groups related to dam safety. The board, referred to as the Managing Board, will have an election for available positions at the 2018 ODSO session of the Water Management of Ohio Conference, which will be held in conjunction with the 38 th International Symposium of the North American Lake Management Society (NALMS). All board seats are a two year term with opportunities to network, learn, share, and promote dam safety. Dam Construction Contractors Industrial Dam Owners Engineering Consultants Conservancy Districts Private Dam Owners At Large 2 Municipal Dam Owners At Large 1 Academia The committee is taking nominations for the following five Managing Board seats which are up for election this fall: Private Dam Owner (currently vacant) Municipal Dam Owner (currently vacant) Industrial Dam Owner (currently held by Dan Pizzino) Academia (Currently held by Professor Halil Sezen) At Large No. 2 (Currently held by Nick Mueller) Terms will start in January 2019 and will last through December We request the nominees name, qualifications, and address delivered by August 31, 2018 to Mike Rowland at mrowland@smeinc.com or call (614) The Committee will review the nominations and try to place two or more names on the ballot for each category. Voting will take place during the ODSO session of 2018 Water Management of Ohio Conference, on October 31, We encourage all ODSO members to vote, regardless of whether you can make it to the WMAO conference. If you will not be able to make it, please Mike Rowland to request an absentee ballot. 13

14 Organiza on Supporters Ohio Dam Safety Organization would like to thank the following organizations for their continued support. The digital version of the newsletter includes a clickable company logo to go directly to their website If you would like to be an organization supporter in the next newsletter, please contact ODSO at ODSO (6376) or at Info@OhioDamSafety.org. As a bonus, supporters are also added to the ODSO website The graphic includes a link to the supporter s company website. 14

15 ODSO 2018 Best Maintained Dam Nomination Form Categories (check one): Industrial Private Property Owner Association Local Public State Conservancy District Name of Dam: ODNR File No. (if known) Owner: Address: Telephone No.: Nominator (optional): Address: Telephone No.: Address: To make a nomination, fill out this form and return it before August 31, 2018 to: Dan Pizzino - ODSO Awards Committee Civil Engineering & Geotechnical Services American Electric Power Service Corporation 1 Riverside Plaza 22 nd Floor Columbus, OH Phone: e mail: dwpizzino@aep.com 15

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17 HEC-RAS Training 2-Dimensional Dam Breach Modeling November 27-29, 2018 The Ohio Dam Safety Organization has partnered with the Ohio Department of Natural Resources, Division of Water Resources, Dam Safety Section to provide comprehensive HEC RAS 2 Dimensional flow and Dam Breach Analysis Training. Highlights of the 3 Day Course includes: Running an unsteady flow model 2 Dimensional Dam Breach Models Diagnosing a Dam Breach Model Lunch and light snacks provided Earn up to 24 PDHs! LOCATION ODNR Assembly Center 2045 Morse Road, Building C E Columbus, Ohio REGISTER Register online at: Register On or Before Tuesday, October 15 th...$775.00/seat Register After Tuesday, October 15 th $875.00/seat INSTRUCTOR WEST CONSULTANTS Raymond Walton, Ph.D., P.E., D.WRE, F.ASCE, has over 40 years of experience directing water resources studies throughout the U.S. and abroad. He is a nationally recognized expert in multi dimensional modeling of surface water, groundwater, and water quality systems. He has conducted river hydraulics, water quality and ecological modeling studies, including water quality modeling on the Columbia River in the Pacific Northwest. He has studied erosion and sedimentation for various rivers and coastal areas, including the Elwha River in Washington State. Prior to joining WEST, he worked at the Hydraulics Research Station in the U.K., taught at North Carolina State University, and spent 15 years with nationwide consulting engineering firms. He has written over 50 professional papers in the fields of hydraulics, environmental engineering, groundwater and surface water hydrology, and instructs HEC RAS nationwide. He has worked with ASCE and ASTM committees on Environmental Software and wetlands monitoring developments, and reviews technical papers for several ASCE journals. 17