Evaluation of How O&M Costs Vary for Alternative Flood Control Strategies

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1 Evaluation of How O&M Costs Vary for Alternative Flood Control Strategies Fargo-Moorhead Diversion Channel ASFPM Conference June 13, 2013 Matt Redington, PE Jeremy Cook HDR Engineering

2 Red River of the North Watershed Insert map showing Red River Watershed and various states Get this map from Ted Shannon HMS project

3 Flood Fighting Flood Stage = 18 feet (19 of the past 20 years) 29 of 90 previous years reached flood stage 1997, 2009, 2011, 2013

4 Fargo and Moorhead Red River Fargo, North Dakota Moorhead, Minnesota

5 Red River Valley Flooding

6 Regular Flood Fighting

7 The Fargo Arena

8 Diversion Project Features Channel In-Town Improvements Buyouts Levees Interior drainage Pump stations Storage

9 Fargo-Moorhead Diversion Channel Is a Monumental Effort Total Cost: $2 Billion USACE O&M Estimate: $3,559,000

10 Fargo-Moorhead Diversion Channel O&M Considered in Design Two Ways O&M Costs Entered Planning: What are the O&M cost impacts of varying flood control strategies? What are the cost savings for Alternate Flood Protection Measures?

11 Operations Defined Inventory Administration Inspections and Monitoring Public Communications Heavy Equipment and Generators Supply and HR Management Temporary Levees Sandbagging

12 Operations Defined Revenue Losses Campgrounds Admission Golf Courses Greens Fees Athletic Facility Fees

13 Maintenance Defined Clean up: Streets Open spaces Repair: Levee Embankments Roadway Embankments Topsoil and Turf Repair Ditch cleanout Debris Removal

14 Maintenance Clean up Paved Surfaces Linear Feet of Street RS Means

15 Maintenance Clean up Open Space Assumed crew Estimated wages Assumed acres/hr

16 Maintenance Roadway Embankment Repair Ditch Cleanout and Debris Removal

17 Calculating Operations Costs Existing Conditions Proposed Alternatives FEMA Cost Data Economist Cost Curves

18 Constructing Cost Curves Insert Figures 2 and 3

19 Calculating New O&M Costs Calculated Expected Annual O&M Costs Similar approach that HEC-FDA uses to estimate flood damages How its calculated: Variable O&M is estimated for each exceedance O&M Costs are weighted by the exceedance probability Sum the probability weighted O&M Costs

20 Exceedance and O&M Cost Curve Expected Annual O&M is the sum of the O&M Costs weighted by the exceedance probability across the curve $ s O&M Exceedance

21 Baseline Costs to Compare The Flood Control Strategy of the System $4,800,000 Pre Mitigation - Total O&M $95,000,000 $4,600,000 $4,400,000 $90,000,000 Expected Annual $4,200,000 $4,000,000 $85,000,000 $80,000,000 Present Value $3,800,000 $3,600,000 $75,000,000 $3,400, Year Operational Stage $70,000,000 EA PV

22 Determining Costs Savings for Alternate Flood Protection Measures

23 Determining Costs Savings for Alternate Flood Protection Measures

24 Determining Costs Savings for Alternate Flood Protection Measures Stage Before Mitigation With Mitigation Option 1 PV O&M Cost PV O&M Cost ($ Millions) ($ Millions) % Reduction % % % % % % % %

25 Summary O&M costs should be a design consideration Alternate flood control strategies can result in varying O&M costs Historical flood fighting data can be a useful tool for proposed conditions

26 Questions?

27 Extra photos for incorporation into presentation

28 Base Condition Results 100 Year Event Operational Stage Total Operations and Maintenance Cost of 100 Year Event Expected Annual Cost Present Value* 30 4,194,000 3,893,000 78,525, ,660,000 4,174,000 84,191, ,802,000 4,259,000 85,906, ,010,000 4,306,000 86,854, ,417,000 4,406,000 88,871, ,159,000 4,524,000 91,252, ,858,000 4,545,000 91,677, ,497,000 4,554,000 91,857,000

29 Costs Not Included Lost Business Revenue Road Closures Private Property In-Town Cleanup Golf Courses Farmland

30 Operations Defined

31 Calculating Operations Costs Costs removed for stages<30 feet Daily average cost per foot of inundation Estimated that 80% of costs were for temporary measures and 20% for permanent measures Divided costs by linear feet of protection impacted by flooding

32 Discount Factor for Smaller Events In Town Flood 100-year Flood Protection Level River Stage

33 Valuing Change in O&M Costs Expected Annual O&M is the sum of the O&M Costs weighted by the exceedance probability across the curve

34 Exceedance Relationships Exceedance 100 Year Event Operational Stage

35 Flood Protection

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