|   | (a) | Assessment      of the Energy Production of the Proposed Little Pringle Wind Farm, dated      April 29, 2008, by Garrad Hassan America, Inc., for Higher Perpetual      Energy, LLC (to the extent applicable to  Grantee). |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | (b) | Assessment      of the Energy Production of the Proposed Pringle Wind I & II Wind      Farms, dated June 17, 2008, by Garrad Hassan America, Inc., for Higher      Perpetual Energy, LLC (to the extent applicable to    Grantee). |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (c) | Boundary      Survey dated May 2, 2008 by Dwayne R. Gresham, Gresham & Associates,      Inc., of Pringle Wind I and II, Section 7, Jno M Swisher Survey, &      Section 2, Block M24, T. C. & Ry. Co. Survey, Hutchison County, Texas      (to the extent applicable toGrantee). |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (d) | Boundary      Survey dated September 4, 2007 by Dwayne R. Gresham, Gresham &      Associates, Inc., of Little Pringle Site, Section 1, Block M24, T C &      Ry Co Survey, Hutchison County, Texas (to the extent applicable to      Grantee). |
|--------|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (e) | Construction      Notice of Intent, filed by Higher Power Energy, LLC on August 25, 2008      with the Texas Commission on Environmental  Quality. |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (f) | Determination      of No Hazard to Air Navigation, concerning Wind Turbine PW I-1 at      Stinnett, TX, issued by the Federal Aviation Administration by letter      dated August 16, 2008 to Higher Power Energy, LLC (Aeronautical Study No.      2008-WTW-2899-OE). |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (g) | Determination      of No Hazard to Air Navigation, concerning Wind Turbine PW I-2 at      Stinnett, TX, issued by the Federal Aviation Administration by letter      dated August 16, 2008 to Higher Power Energy, LLC (Aeronautical Study No.      2008-WTW-2900-OE). |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (h) | Determination      of No Hazard to Air Navigation, concerning Wind Turbine PW I-3 at      Stinnett, TX, issued by the Federal Aviation Administration by letter      dated August 16, 2008 to Higher Power Energy, LLC (Aeronautical Study No.      2008-WTW-2901-OE). |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (i) | Determination      of No Hazard to Air Navigation, concerning Wind Turbine PW I-4 at      Stinnett, TX, issued by the Federal Aviation Administration by letter      dated August 16, 2008 to Higher Power Energy, LLC (Aeronautical Study No.      2008-WTW-2902-OE). |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (j) | Determination      of No Hazard to Air Navigation, concerning Wind Turbine PW I-5 at      Stinnett, TX, issued by the Federal Aviation Administration by letter      dated August 16, 2008 to Higher Power Energy, LLC (Aeronautical Study No.      2008-WTW-2903-OE). |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | (k) | Document      “JV_KeyFamilyLease_UnsignedCopy.doc”, a blank form of a lease agreement      between Higher Power Energy, LLC and a landowner (to the extent applicable      to Grantee). |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (l) | Document      “JV_Generic_NonDisturbanceAgreement.DOC”, a blank form of a Nondisturbance      and Attornment Agreement between a mortgagee and a project company (to the      extent applicable to Grantee). |
|--------|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (m) | Document      “LP1_InterconnectAgmnt_Addendum.doc”, titled “Addendum to Interconnection      Agreement”. |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------|

|   | (n) | Document  “LP_RevisedTitleSearch.pdf”,      titled “Little Pringle TitleSearch”. |
|--------|-----|--------------------------------------------------------------------------------------------------------------------|

|   | (o) | Document      “LP_SiteDescription.doc”, titled “Little Pringle Site:  Approx.      505 Acres”. |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------|

|   | (p) | Document      “LP_SPSAvoidedCosts_GeneralNotes.doc”, titled “Subject: Avoided costs-SPS”      (to the extent applicable toGrantee). |
|--------|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (q) | Draft      dated February 2008 of Wind Generation Purchase Agreement between Higher      Power Energy, LLC and Southwestern Public Service  Company. |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (r) | Draft      dated September 2008 of Wind Generation Purchase Agreement between Sunray      Wind, LLC and Southwestern Public Service  Company. |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------|

|   | (s) | Electrical      One Line Diagram for “Higher Power Energy, LLC; Pringle I - 10 MW Wind      Turbine Generator Project; Hutchison County, Texas”, dated June 26, 2008,      by Richard C. Gross P.E., Inc. |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (t) | Electrical      Substation Conceptual Equipment Plan and Elevations for “Pringle, Texas;      Higher Power Energy LLC; 10 MW Wind Farm”, dated June 26, 2008, by Richard      C. Gross P.E., Inc. (to the extent applicable to  Grantee). |
|--------|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (u) | Feasibility      Study of the Energy Production of the Proposed Big Pringle, Little      Pringle, and H&H Wind Farms in Texas, dated December 21, 2007, by      Garrad Hassan America, Inc., for Higher Perpetual Energy, LLC (to the      extent applicable to Grantee). |
|--------|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (v) | Letter      dated August 20, 2007 from Brittany Seward, Cooley Manion Jones LLP, to      Mark Patkunas and Jeff Martin, with attached Title Search for Little      Pringle (to the extent applicable toGrantee). |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | (w) | Letter      dated February 4, 2008 from James R. Brannen, Southwestern Public Service      Company d/b/a Xcel Energy, to Mark Patkunas, Higher Power Energy, LLC,      with attached Design Guide and Engineering Estimate executed as of      February 8, 2008 by Southwestern Public Service Company d/b/a Xcel Energy      and as of April 10, 2008 by Higher Power Energy,  LLC. |
|--------|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (x) | Letter      dated October 1, 2007 from James R. Brannen, Southwestern Public Service      Company d/b/a Xcel Energy, to Mark Patkunas, Higher Power Energy, LLC,      with attached Design Guide and Engineering  Estimate. |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (y) | Letter      from the Texas Commission on Environmental Quality regarding TPDES General      Permit for Construction Storm Water Runoff: Storm Water Notice of Intent      Authorization. |
|--------|-----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (z) | Letter      from Xcel Energy Services Inc. to the Public Utility Commission of Texas,      dated February 28, 2008, regarding “Project No. 18692 Avoided Cost      Availability of Electric Utility System Cost Data Pursuant to Subst. R.      25.242(e)(2) [formerly Subst. R. 23.66(c)(1)]” with attached update to      Southwestern Public Service Company’s February 15, 2008 informational data      filing pursuant to the Commission’s Substantive Rule 25.242(e)(2),      Availability of Electric Utility System Cost Data (to the extent      applicable to Grantee). |
|--------|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (aa) | Map      “LP_GeographicLayout.bmp” by DeLorme of Little Pringle Wind Farm (to the      extent applicable to Grantee). |
|--------|------|-----------------------------------------------------------------------------------------------------------------------------------|

|   | (bb) | Map      “LP_Map.jpg” by DeLorme of Little Pringle Wind Farm (to the extent      applicable to Grantee). |
|--------|------|----------------------------------------------------------------------------------------------------------------------|

|   | (cc) | Map      “LP_ProposedExpansion.bmp” by DeLorme of Little Pringle Wind Farm (to the      extent applicable to Grantee). |
|--------|------|------------------------------------------------------------------------------------------------------------------------------------|

|   | (dd) | Map      “LP1and2_FAA_TurbineLayout.bmp” by DeLorme of Little Pringle Wind Farm (to      the extent applicable to Grantee). |
|--------|------|-----------------------------------------------------------------------------------------------------------------------------------------|

|   | (ee) | Preliminary      Geotechnical Evaluation: Little Pringle Wind Farm, Hutchinson County,      Texas, Apex Project No. 107-229, dated November 2007, prepared by Apex      Geoscience Inc. for Higher Power Energy, LLC (to the extent applicable to      Grantee). |
|--------|------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (ff) | Proposed      Wind Power Site: Pringle Wind, Site Reconnaissance and Avian Report, dated      August 26, 2007, prepared by Dr. Richard Harris Podolsky for Higher Power      Energy, LLC (to the extent applicable to  Grantee). |
|--------|------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | (gg) | Storm      Water Construction General Permit, Texas Commission on Environmental      Quality, Permit No. TXR15MH51, issued to Pringle Wind Farm (project) and      Higher Power Energy, LLC (operator) with coverage effective August 25,      2008 (to the extent applicable toGrantee). |
|--------|------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (hh) | Spreadsheet      “JV_OldProjectStatus_Dec07.xls” titled “HPE PROJECT LIST 12/02/2007”      containing data regarding Little Pringle, Palo Duro, and Big Pringle (to      the extent applicable to Grantee). |
|--------|------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (ii) | Spreadsheet      “JVProjects_DevelopmentCosts.xls” listing development phase cash flows for      Little Pringle, Big Pringle, and Palo Duro (to the extent applicable to      Grantee). |
|--------|------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (jj) | Spreadsheet      “LP_TypicalDayEnergyProfileForD8.2.xls” containing wind, power, and other      data (to the extent applicable toGrantee). |
|--------|------|--------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (kk) | Suggested      Form of Agreement Between Owner and Design/Builder on the Basis of a      Stipulated Price, between HPE DeWind, a joint venture, as owner, and      Balfour Beatty Wind Group, a joint venture, as design/builder, for Phase I      of the Pringle Wind Farm, with all attached schedules, exhibits, annexes,      and other documentation (including the Escrow  Agreement). |
|--------|------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (ll) | Any      and all other wind resource data, books and records, contracts, permits,      reports and any other properties, assets and rights of any kind, whether      tangible or intangible, real or personal, owned or hereafter acquired by      Grantor and which are related to the following leases or the wind farm to      be developed on the real estate subject to such  leases: |
|--------|------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (i) | Lease      Agreement dated August 6, 2008 between Higher Power Energy, LLC and      Shields and Sons; and |
|--------|-----|-----------------------------------------------------------------------------------------------------------|

|   | (ii) | Lease      Agreement dated August 6, 2008 between Higher Power Energy, LLC and the      Don McLain Family LimitedPartnership. |
|--------|------|-------------------------------------------------------------------------------------------------------------------------------|

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----

| ASSIGNOR                  |
|---------------------------|
| PRINGLE      WIND II, LLC |
|                      |   |
| By:                       |   |
|                      |   |
| Name:                     |   |
|                      |   |
| Title:                    |   |
|                      |   |
| ASSIGNEE                  |
| LITTLEPRINGLE1,      LLC  |
|                      |   |
| By:                       |   |
|                      |   |
| Name:                     |   |
|                      |   |
| Title:                    |   |

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