Exhibit
99.1











January
29, 2010





EV Energy
Partners, L.P.


1001
Fannin Street, Suite 800


Houston,
Texas  77002





Re:
              Evaluation
      Summary - SECEV
      Energy Partners, L.P. InterestsTotal
      Proved ReservesVarious
      Oil and Gas PropertiesAs of December 31,
  2009





Ladies
and Gentlemen:





As
requested, this report was prepared on January 29, 2010 for EV Energy Partners,
L.P. (“EVEP”) for the purpose of submitting our estimates of total proved
reserves and forecasts of economics attributable to the subject interests. We
evaluated 100% of EVEP reserves, which are made up of oil and gas properties in
various fields throughout the southern and eastern United States. 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 values presented
below:





Proved
                            
                            
                            ProvedDeveloped
                            
                            
                            Developed
                            
                            
                            Proved
                            
                            
                            Proved
                            
                            
                            TotalProducing
                            
                            
                            Non-Producing
                            
                            
                            Developed
                            
                            
                            Undeveloped
                            
                            
                            ProvedNet
      ReservesOil
                            
                            -
      Mbbl
                            
                            
                            6,570.7
                            
                            
                            209.5
                            
                            
                            
                            6,780.3
                            
                            
                            
                            624.7
                            
                            
                            
                            7,404.9Gas
                            
                            -
      MMcf
                            
                            
                            240,867.3
                            
                            
                            4,090.3
                            
                            
                            
                            244,957.6
                            
                            
                            
                            12,289.7
                            
                            
                            
                            257,247.4NGL
                            
                            -
      Mbbl
                            
                            
                            8,568.8
                            
                            
                            553.7
                            
                            
                            
                            9,122.4
                            
                            
                            
                            1,534.1
                            
                            
                            
                            10,656.6RevenueOil
                            
                            -
      M$
                            
                            
                            367,849.6
                            
                            
                            11,615.7
                            
                            
                            
                            379,465.3
                            
                            
                            
                            35,562.9
                            
                            
                            
                            415,028.2Gas
                            
                            -
      M$
                            
                            
                            850,007.8
                            
                            
                            13,130.3
                            
                            
                            
                            863,138.0
                            
                            
                            
                            40,036.8
                            
                            
                            
                            903,174.8NGL
                            
                            -
      M$
                            
                            
                            271,892.2
                            
                            
                            18,237.8
                            
                            
                            
                            290,130.0
                            
                            
                            
                            50,422.0
                            
                            
                            
                            340,552.0Net
      Profits Paid
                            
                            -
      M$
                            
                            
                            1,675.4
                            
                            
                            0.0
                            
                            
                            
                            1,675.4
                            
                            
                            
                            1,071.2
                            
                            
                            
                            2,746.6Severance
      Taxes
                            
                            -
      M$
                            
                            
                            91,798.5
                            
                            
                            3,331.6
                            
                            
                            
                            95,130.1
                            
                            
                            
                            8,976.6
                            
                            
                            
                            104,106.7Ad
      Valorem Taxes
                            
                            -
      M$
                            
                            
                            31,299.4
                            
                            
                            681.4
                            
                            
                            
                            31,980.8
                            
                            
                            
                            2,266.2
                            
                            
                            
                            34,247.0Operating
      Expenses
                            
                            -
      M$
                            
                            
                            594,476.8
                            
                            
                            6,234.3
                            
                            
                            
                            600,711.1
                            
                            
                            
                            30,133.9
                            
                            
                            
                            630,844.9Other
      Deductions
                            
                            -
      M$
                            
                            
                            85,364.5
                            
                            
                            481.6
                            
                            
                            
                            85,846.2
                            
                            
                            
                            1,117.5
                            
                            
                            
                            86,963.8Investments
                            
                            -
      M$
                            
                            
                            0.0
                            
                            
                            5,496.5
                            
                            
                            
                            5,496.5
                            
                            
                            
                            45,567.5
                            
                            
                            
                            51,064.0Net
      Cash Flows
                            
                            -
      M$
                            
                            
                            685,134.8
                            
                            
                            26,758.4
                            
                            
                            
                            711,893.1
                            
                            
                            
                            36,888.7
                            
                            
                            
                            748,781.8Discounted
      @ 10%
                            
                            -
      M$
                            
                            
                            332,716.4
                            
                            
                            9,804.6
                            
                            
                            
                            342,521.0
                            
                            
                            
                            10,254.8
                            
                            
                            
                            352,775.8









EV
Energy Partners, L.P.


January
29, 2010
 Page


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.





Presentation


This
Report is divided into four main reserve category sections: Total Proved (“TP”),
Proved Developed Producing (“PDP”), Proved Developed Non-Producing (“PDNP”) and
Proved Undeveloped (“PUD”). Within each reserve category section are grand total
Table I and Summary Plots for each of the main property areas and the entire
reserve category. Each Table I presents composite reserve estimates and economic
forecasts for the particular group of properties. Following Table I is a Summary
Plot, which is a composite rate-time history-forecast curve for the same group
of properties. Table II “oneline” summaries are also provided within the PDP,
PDNP and PUD sections. The oneline summaries 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
reserve category.





The data
presented in each Table I is explained in page 1 of the Appendix. The methods
employed in estimating reserves are described in page 2 of the Appendix. For a
more detailed explanation of the report layout, please refer to the Table of
Contents following this letter.





Hydrocarbon
Pricing


As
required by the SEC, December 31, 2009 oil and gas prices of $61.18 per STB and
$3.866 per MMBTU were calculated and applied to all properties unescalated. Oil
and gas price differentials were furnished by your office on a per-property
basis and were held constant, except for those properties tied to gas volume
commitment contracts. Price differentials may include adjustments for basis
differential, transportation, gas shrinkage and/or crude quality and gravity
corrections. Furthermore, gas prices were adjusted with a heating value (BTU
content) applied on a per-property basis.





Expenses and
Taxes


Lease operating expenses (“LOE”) were
forecast as furnished by your office were held constant for the life of the
properties. Routine LOE was forecast on an individual well basis based on
historical lease operating statements. Investments as provided were not
escalated for this evaluation. Severance tax rates and ad valorem tax rates were
also provided by your office and were applied accordingly to
revenue.





Miscellaneous


An on-site field inspection of the
properties has not been performed. The mechanical operation or condition 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 EVEP 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.









EV
Energy Partners, L.P.
 January
29, 2010
 Page
3


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, pricing
differentials, 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 EV Energy Partners, L.P.  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 EV
Energy Partners, L.P. 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,/s/CAWLEY, GILLESPIE & ASSOCIATES,
      INC.CAWLEY,
      GILLESPIE & ASSOCIATES, INC.Texas Registered Engineering
      Firm F-693