Exhibit 99.1







March 2, 2010
 
 Mr. Jim Denny
 Magnum Hunter Resources Corporation
 777 Post Oak Blvd., Suite 910
 Houston, Texas 77056
 
 Re:
Evaluation Summary – SEC Price CaseMagnum Hunter Resources Corp. InterestsTotal Proved ReservesCertain Properties in Cameron Parish, LAAs of December 31, 2009
 
 Dear Mr. Denny:
 
 As requested, this report was prepared on March 2, 2010 for Magnum Hunter Resources Corporation (“MHR”) for the purpose of submitting our summary level reserve estimates and forecasts of economics attributable to the subject interests. We evaluated 100% of the MHR reserves, which are located in the Chalkley Field in Cameron Parish, Louisiana. This report, with an effective date of December 31, 2009, was prepared using constant prices and costs and conforms to the guidelines of the Securities and Exchange Commission (SEC). The results of this evaluation are presented in the accompanying tabulations, with a composite summary of the main SEC Pricing values presented below:
 
 
 ProvedDeveloped

ProvedProducing

Undeveloped

Total ProvedNet ReservesOil
- Mbbl

123.0

128.1

251.1Gas
- MMcf

102.7

102.5

205.2RevenueOil
- M$

7,466.0

7,772.0

15,238.0Gas
- M$

0.0

0.0

0.0Severance Taxes
- M$

967.3

1,005.4

1,972.7Ad Valorem Taxes
- M$

130.7

136.0

266.7Operating Expenses
- M$

3,213.1

1,465.7

4,678.8Other Deductions
- M$

0.0

0.0

0.0Investments
- M$

0.0

1,237.5

1,237.5Net Operating Income
- M$

3,155.0

3,927.3

7,082.3Discounted @ 10%
- M$

1,919.5

1,999.7

3,919.2
 
 
 
 
 Magnum Hunter Resources Corporation Interests
     The discounted cash flow value shown above should not be construed to represent an estimate of the fair market value by Cawley, Gillespie & Associates, Inc. (“CG&A”).
 
 Presentation
 This report presents three (3) different pricing scenarios, which include the main SEC Pricing case and two price sensitivity cases. The main SEC Pricing case is divided into three reserve category sections: Total Proved (“TP”), Proved Developed Producing (“PDP”) and Proved Undeveloped (“PUD”). Within each reserve category section are Tables I, Summary Plots and Tables II. The Tables I present composite reserve estimates and economic forecasts for the particular reserve category or property grouping. The Summary Plots are composite rate-time history-forecast curves for the corresponding Table I. Following certain Summary Plots are Table II “oneline” summaries that present estimates of ultimate recovery, gross and net reserves, ownership, revenue, expenses, investments, net income and discounted cash flow for the individual properties that make up the corresponding Table I.
 
 The two price sensitivity cases are presented in the Appendix and are described in more detail below. For a more detailed explanation of the report layout, please refer to the Table of Contents following this letter. The data presented in the composite Tables I are explained in page 1 of the Appendix. The methods employed in estimating reserves are described in page 2 of the Appendix.
 
 Hydrocarbon Pricing
 As required by the SEC, December 31, 2009 oil and gas prices of $61.18/STB and $3.866/MMBTU, respectively, were calculated and applied to all properties unescalated.As requested by MHR, two additional price sensitivity cases were prepared and are presented in the Appendix. Price Sensitivity #1 oil and gas prices of $79.36/STB and $5.805/MMBTU, respectively, were applied based on closing prices as quoted on December 31, 2009. Price Sensitivity #2 oil and gas prices were applied based on a NYMEX future strip price deck as quoted on December 31, 2009 and provided below.
 
 SEC Pricing

Average 2009


Sensitivity Case #1

Flat 12-31-09 Pricing


Sensitivity Case #2

Strip 12-31-09 PricingWTI Cushing


Henry Hub


WTI Cushing


Henry Hub


NYMEX


NYMEXCash


Spot


Cash


Spot


Futures


FuturesYear

$/STB


$/MMBTU


$/STB


$/MMBTU


$/STB


$/MMBTU2010


61.18



3.866



79.36



5.805



81.94



5.7902011


“



“



“



“



85.81



6.3362012


“



“



“



“



87.83



6.5272013


“



“



“



“



89.31



6.6692014+


“



“



“



“



91.09



6.843
 
 All economic factors were held constant in accordance with SEC guidelines. An oil price differential of -$0.50/STB was estimated from recent Lease Operating Statements (LOS) and was applied unescalated in all each price case. Oil price differentials may include adjustments for basis differential, transportation and/or crude quality corrections. Even though the Chalkley wells produce gas, no gas sales were occurring as of the effective date and we therefore did not forecast gas revenue. However, because gas sales are expected to begin in the 2nd quarter of 2010, we show potential net gas sales (column 6) and no gas revenue (column 13).
 
 Expenses and Taxes
 Operating expenses and capital expenditures were not escalated in compliance with SEC guidelines. Initial lease operating expenses (column 22) were forecast on a per-well basis, with values ranging from $14,000 to $18,000 per well per month depending upon the well. As provided, a gross capital expenditure of $2,000,000 was applied for drilling and completion of the single PUD well.
  
 Magnum Hunter Resources Corporation Interests
 
 Oil severance taxes of 12.95% of revenue were applied as provided. Ad valorem taxes of 2% of revenue were applied for all properties.
 
 Miscellaneous
 An on-site field inspection of the properties has not been performed. The mechanical operation or conditions of the wells and their related facilities have not been examined nor have the wells been tested by Cawley, Gillespie & Associates, Inc. Possible environmental liability related to the properties has not been investigated nor considered. The cost of plugging and the salvage value of equipment at abandonment have not been included. The reserves and economics presented herein are unrisked, and represent 100% of the MHR proved reserves.
 
 The proved reserve classifications used herein conform to the definitions of the SEC as defined in pages 3 and 4 of the Appendix. The reserves and economics are predicated on regulatory agency classifications, rules, policies, laws, taxes and royalties in effect as noted herein. The possible effects of changes in legislation or other Federal or State restrictive actions have not been considered. However, we do not anticipate nor are we aware of any legislative changes or restrictive regulatory actions that may impact the recovery of reserves. The assumptions, data, methods and procedures used herein are appropriate for the purpose served by this report. It should be realized that the reserves actually recovered, the revenue derived therefrom and the actual cost incurred could be more or less than the estimated amounts.
 
 All estimates represent our best judgment based on the data available at the time of preparation.  The reserve estimates were based on interpretations of factual data furnished by your office and available from our files. Oil and gas prices, expense data, tax values and ownership interests were also supplied by you and were accepted as furnished. Additionally, historical well/lease/unit production was provided by you and was accepted as furnished. To some extent information from public records has been used to check and/or supplement these data. The basic engineering and geological data were subject to third party reservations and qualifications. Nothing has come to our attention, however, that would cause us to believe that we are not justified in relying on such data
 
 This report was prepared for the exclusive use of Magnum Hunter Resources Corporation.  Third parties should not rely on this report without the written consent of the above and Cawley, Gillespie & Associates, Inc. We are independent registered professional engineers and geologists. We do not own an interest in the properties or Magnum Hunter Resources Corporation and are not employed on a contingent basis. We have used all methods and procedures that we consider necessary under the circumstances to prepare this report. Our work papers and related data are available for inspection and review by authorized, interested parties.
 
 
 Yours very truly,
  CAWLEY, GILLESPIE & ASSOCIATES, INC.
  CAWLEY, GILLESPIE & ASSOCIATES, INC.
 Texas Registered Engineering Firm F-693