Document:

<PAGE>

                                                                    Exhibit 10.5

                     DISTILLER'S GRAIN MARKETING AGREEMENT

     THIS DISTILLER'S GRAIN MARKETING AGREEMENT (the "Agreement"), is entered
into effective as of March 1, 2004, by Red Trail Energy LLC, a North Dakota
Limited Liability Company ("Seller"), and Commodity Specialist Company, a
Delaware corporation ("Buyer").

                                   WITNESSETH:

     WHEREAS, Seller desires to sell and Buyer desires to purchase the
Distiller's Dried Grains with Solubles ("DDGS"), hereinafter DDGS, output of the
ethanol production plant which Seller owns in Richardton, North Dakota; and

     WHEREAS, Seller and Buyer wish to agree in advance of such sale and
purchase to the price formula, payment, delivery and other terms thereof in
consideration of the mutually promised performance of the other;

     NOW, THEREFORE, in consideration of the promises and the mutual covenants
and conditions herein contained, and for other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged by both parties, it
is hereby agreed:

     1. BUYER PERFORMANCE. Buyer agrees to perform the services that it provides
for Seller in a professional and competent manner.

     2. PURCHASE AND SALE. Seller agrees to sell to Buyer and Buyer agrees to
purchase from Seller the entire bulk feed grade DDGS, output from Seller's plant
at Richardton, North Dakota. (hereinafter the "Plant"), subject to all terms and
conditions set forth in this Agreement. Buyer shall label all Product that is
sold by Buyer and shall register all labels with the states where the Products
are sold.

     3. TRADE RULES. All purchases and sales made hereunder shall be governed by
the Feed Trade Rules of the National Grain and Feed Association unless otherwise
specified. Said Trade Rules, a copy of which is appended hereto as Exhibit A,
shall, to the extent applicable, be apart of this Agreement as if fully set
forth herein.

     4. TERM. The term of this Agreement shall be for one year commencing as of
completion and start-up of production of the Plant. Start-up is anticipated to
be July 1, 2005. Thereafter this agreement shall remain in effect until
terminated by either party at its unqualified option by providing the other
party hereto not less than 90 days written notice of its election to terminate
this Agreement.

     5. DELIVERY AND TITLE.

          A. The place of delivery for all the Products sold pursuant to this
     Agreement shall be FOB Plant. Buyer and Buyer's agents shall be given
     access to Seller's Plant in a manner and at all times reasonably necessary
     and convenient for Buyer to take delivery as provided herein. Buyer shall
     coordinate the loading and shipping of all outbound Products purchased
     hereunder which is shipped by truck or rail with Seller. All labor and
     equipment necessary to load trucks or rail cars shall be supplied by Seller
     without charge to Buyer. Seller agrees to handle the Products in a good and
     workmanlike manner in

<PAGE>

     accordance with Buyer's reasonable requirements and in accordance with
     normal industry practice. Seller shall maintain the truck and rail loading
     facilities in safe operating condition in accordance with normal industry
     standards.

          B. Seller further warrants that storage space for not less than seven
     days production of DDGS shall be reserved for Buyer's use at the Plant and
     shall be continuously available for storage of DDGS purchased by Buyer
     hereunder at no charge to Buyer. Seller shall be responsible at all times
     for the quantity, quality and condition of any the Products in storage at
     the Plant. Seller shall not be responsible for the quantity, quality and
     condition of any of the Products stored by Buyer at locations other than
     the Plant.

          C. Buyer shall give to Seller a schedule of quantities of the Products
     to be removed by truck and rail with sufficient advance notice reasonably
     to allow Seller to provide the required services. Seller shall provide the
     labor, equipment and facilities necessary to meet Buyer's loading schedule
     and, except for any consequential or indirect damages, shall be responsible
     for Buyer's actual costs or damages resulting from Seller's failure to do
     so. Buyer shall order and supply trucks and rail cars as scheduled for
     truck and rail shipments. All freight charges shall be the responsibility
     of Buyer and shall be billed directly to Buyer.

          D. Buyer shall provide loading orders as necessary to permit Seller to
     maintain Seller's usual production schedule, provided, however, that Buyer
     shall not be responsible for failure to schedule removal of the Products
     unless Seller shall have provided to Buyer production schedules as follows:
     Five (5) days prior to the beginning of each calendar month during the term
     hereof, Seller shall provide to Buyer a tentative schedule for production
     in the next calendar month. Seller shall inform Buyer daily of inventory
     and production status. For purposes of this paragraph, notification will be
     sufficient if made by e-mail or facsimile as follows:

     If to Buyer, to the attention of Steve Markham, Facsimile number
     612-330-9894 or e-mail to smarkham@csc-world.com, and

If to Seller, to the attention of _________________________________ or e-mail to
______________________. Or to such other representatives of Buyer and Seller as
they may designate to the other in writing.

          E. Title, risk of loss and full shipping responsibility shall pass to
     Buyer upon loading the Products into trucks or rail cars and delivering to
     Buyer a the bill of lading for each such shipment.

6.   PRICE AND PAYMENT

          A. Buyer agrees to pay Seller as follows: for all DDGS removed by
     Buyer from the Plant a price equal to ninety eight (98%). For purposes of
     this provision, the FOB

                                        2

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     Plant price shall be the actual sale price, less all freight costs incurred
     by Buyer in delivering the Product to its customer. Buyer agrees that it
     shall not sell Product for delivery more than 90 days from the date of
     entering into a sale without the consent of Seller. Buyer agrees to use
     commercially reasonable efforts to achieve the highest resale price
     available under prevailing market conditions. Seller's sole and exclusive
     remedy for breach of Buyer's obligations hereunder shall be to terminate
     this Agreement, Buyer shall collect all applicable state tonnage taxes on
     Products sold by Buyer and shall remit to the appropriate governmental
     agency.

          B. Within three (3) business days following receipt of certified
     weight certificates, which certificates shall be presented to Buyer each
     Thursday for all shipments during the preceding week, Buyer shall pay
     Seller the full price, determined pursuant to paragraph 6A above, for all
     properly documented shipments. Buyer agrees to maintain accurate sales
     records and to provide such records to Seller upon request. Seller shall
     have the option to audit Buyer's sales invoices at any time during normal
     business hours and during the term of this Agreement.

7.   QUANTITY AND WEIGHTS.

          A. It is understood that the output of the Products shall be
     determined by Seller's production schedule and that no warranty or
     representation has been made by Seller as to the exact quantities of
     Products to be sold pursuant to this Agreement,

          B. The quantity of Products delivered to Buyer from Seller's Plant
     shall be established by weight certificates obtained from scale at the
     Plant which is certified as of the time of weighing and which complies with
     all applicable laws, rules and regulations or in the event that the scale
     at the Plant is inoperable then at other scales which are certified as of
     the time of weighing and which comply with all applicable laws, rules and
     regulations. The outbound weight certificates shall be determinative of the
     quantity of the Products for which Buyer is obligated to pay pursuant to
     Section 5.

8.   QUALITY.

          A. Seller understands that Buyer intends to sell the Products
     purchased from Seller as a primary animal feed ingredient and that said
     Products are subject to minimum quality standards for such use. Seller
     agrees and warrants that the Products produced at its plant and delivered
     to Buyer shall be accepted in the feed trade under current industry
     standards.

          B. Seller warrants that all Products, unless the parties agree
     otherwise, sold to Buyer hereunder shall, at the time of delivery to Buyer,
     conform to the following minimum quality standard:

                                        3

<PAGE>

<TABLE>
<CAPTION>
        Protein       Fat        Fiber      Moisture      Ash
       ---------   ---------   ---------   ---------   ---------
       Min   Max   Min   Max   Min   Max   Min   Max   Min   Max
       ---   ---   ---   ---   ---   ---   ---   ---   ---   ---
<S>    <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>
DDGS    25          10                15          12          6
</TABLE>

The standard for DDGS will be determined on an as is basis per original sample
rather than a dry weight basis.

          C. Seller warrants that at the time of loading, the Products will not
     be adulterated or misbranded within the meaning of the Federal Food, Drug
     and Cosmetic Act and that each shipment may lawfully be introduced into
     interstate commerce under said Act. Payment of invoice does not waive
     Buyer's rights if goods do not comply with terms or specifications of this
     Agreement. Unless otherwise agreed between the parties to this Agreement,
     and in addition to other remedies permitted by law, the Buyer may, without
     obligation to pay, reject either before or after delivery, any of the
     Products which when inspected or used fail in a material way to conform
     to this Agreement. Should any of the Products be seized or condemned by any
     federal or state department or agency for any reason except noncompliance
     by Buyer with applicable federal or state requirements, such seizure or
     condemnation shall operate as a rejection by Buyer of the goods seized or
     condemned and Buyer shall not be obligated to offer any defense in
     connection with the seizure or condemnation. When rejection occurs before
     or after delivery, at its option, Buyer may:

               (1) Dispose of the rejected goods after first offering Seller a
     reasonable opportunity of examining and taking possession thereof, if the
     condition of the goods reasonably appears to Buyer to permit such delay in
     making disposition; or

               (2) Dispose of the rejected goods in any manner directed by
     Seller which Buyer can accomplish without violation of applicable laws,
     rules, regulations or property rights; or

               (3) If Buyer has no available means of disposal of rejected goods
     and Seller fails to direct Buyer to dispose of it as provided herein, Buyer
     may return the rejected goods to Seller, upon which event Buyer's
     obligations with respect to said rejected goods shall be deemed fulfilled.
     Title and risk of loss shall pass to Seller promptly upon rejection by
     Buyer.

               (4) Seller shall reimburse Buyer for all costs reasonably
     incurred by Buyer in storing, transporting, returning and disposing of the
     rejected goods. Buyer shall have no obligation to pay Seller for rejected
     goods and may deduct reasonable costs and expenses to be reimbursed by
     Seller from amounts otherwise owed by Buyer to Seller.

               (5) If Seller produces Products which comply with the warranty in
     Section C above but which do not meet applicable industry standards, Buyer
     agrees to purchase such Products for resale but makes no representation or
     warranty as to the price at which such Product can be sold. If the Products
     deviate so severely from industry standard as to

                                        4

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be unsalable, then it shall be disposed of in the manner provided for rejected
goods in Section C above.

          D. If Seller knows or reasonably suspects that any of the Products
     produced at its Plant are adulterated or misbranded, or outside of industry
     quality standards. Seller shall promptly so notify Buyer so that such
     Product can be tested before entering interstate commerce. If Buyer knows
     or reasonably suspects that any of the Products produced by Seller at its
     Plant are adulterated, misbranded or outside of industry quality standards,
     then Buyer may obtain independent laboratory tests of the affected goods.
     If such goods are tested and found to comply with all warranties made by
     Seller herein, then Buyer shall pay all testing costs; and if the goods are
     found not to comply with such warranties, Seller will pay all testing
     costs.

     9. RETENTION OF SAMPLES. Seller will take an origin sample of Products from
each truck and rail car before it leaves the Plant using standard sampling
methodology. Seller will label these samples to indicate the date of shipment
and the truck or railcar number involved. Seller will also retain the samples
and labeling information for no less than one year.

     10. INSURANCE.

          A. Seller warrants to Buyer that all employees engaged in the removal
     of the Products from Seller's Plant shall be covered as required by law by
     worker's compensation and unemployment compensation insurance.

          B. Seller agrees to maintain throughout every term of this Agreement
     comprehensive general liability insurance, including product liability
     coverage, with combined single limits of not less than $2,000,000. Seller's
     policies of comprehensive general liability insurance shall be endorsed to
     require at least thirty (30) days advance notice to Buyer prior to the
     effective date of any decrease in or cancellation of coverage. Seller shall
     cause Buyer to be named as an additional insured on Seller's insurance
     policy and shall provide a certificate of insurance to Buyer to establish
     the coverage maintained by Seller not later than fourteen (14) days prior
     to completion and start-up of production of the Plant.

          C. Buyer agrees to carry such insurance on its vehicles operating on
     Seller's property as Seller reasonably deems appropriate. The parties
     acknowledge that Buyer may elect to self insure its vehicles. Upon request,
     Buyer shall provide certificate of insurance to Seller to establish the
     coverage maintained by Buyer.

          D. Notwithstanding the foregoing, nothing herein shall be construed to
     constitute a waiver by either party of claims, causes of action or other
     rights which either party may have or hereafter acquire against the other
     for damage or injury to its agents, employees, invitees, property,
     equipment or inventory, or third party claims against the other for damage
     or injury to other persons or the property of others.

                                        5

<PAGE>

     11.  REPRESENTATIONS AND WARRANTIES

          A. Seller represents and warrants that all of the Products delivered
     to Buyer shall not be adulterated or misbranded within the meaning of the
     Federal Food, Drug and Cosmetic Act and may lawfully be introduced into
     interstate commerce pursuant to the provisions of the Act. Seller further
     warrants that the Products shall fully comply with any applicable state
     laws governing quality, naming and labeling of product. Payment of invoice
     shall not constitute a waiver by Buyer of Buyer's rights as to goods which
     do not comply with this Agreement or with applicable laws and regulations.

          B. Seller represents and warrants that the Products delivered to Buyer
     shall be free and clear of liens and encumbrances.

     12. EVENTS OF DEFAULT. The occurrence of any of the following shall be an
event of default under this Agreement ("Event of Default"): (1) failure of
either party to make payment to the other when due; (2) default by either party
in the performance of the covenants and agreements set forth in this Agreement;
(3) if either party shall become insolvent, or make a general assignment for the
benefit of creditors or to an agent authorized to liquidate any substantial
amount of its assets, or be adjudicated bankrupt, or file a petition in
bankruptcy, or apply to a court for the appointment of a receiver for any of its
assets or properties with or without consent, and such receiver shall not be
discharged within sixty (60) days following appointment.

     13. REMEDIES. Upon the happening of an Event of Default, the parties hereto
shall have all remedies available under applicable law with respect to an Event
of Default by the other party. Without limiting the foregoing, the parties shall
have the following remedies whether in addition to or as one of the remedies
otherwise available to them; (1) to declare all amounts owed immediately due and
payable; and (2) immediately to terminate this Agreement effective upon receipt
by the party in default of the notice of termination, provided, however, the
parties shall be allowed 10 days from the date of receipt of notice of default
for to cure any default. Notwithstanding any other provision of this Agreement,
Buyer may offset against amounts otherwise owed to Seller the price of any
product which fails to conform to any requirements of this Agreement.

     14. FORCE MAJEURE. Neither Seller nor Buyer will be liable to the other for
any failure or delay in the performance of any obligation under this Agreement
due to events beyond its reasonable control, including, but not limited to,
fire, storm, flood, earthquake, explosion, act of the public enemy, riots, civil
disorders, sabotage, strikes, lockouts, labor disputes, labor shortages, war
stoppages or slowdowns initiated by labor, transportation embargoes, failure or
shortage of materials, acts of God, or acts or regulations or priorities of the
federal, state or local government or branches or agencies thereof.

     15. INDEMNIFICATION.

          A. Seller shall indemnify, defend and hold Buyer and its officers,
     directors,

                                        6

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     employees and agents harmless, from any and all losses, liabilities,
     damages, expenses (including reasonable attorneys' fees), costs, claims,
     demands, that Buyer or its officers, directors, employees or agents may
     suffer, sustain or become subject to, or as a result of (i) any
     misrepresentation or breach of warranty, covenant or agreement of Seller
     contained herein or (ii) the Seller's negligence or willful misconduct.

          B. Buyer shall indemnify, defend and hold Seller and its officer,
     directors, employees and agents harmless, from any and all losses,
     liabilities, damages, expenses (including reasonable attorneys' fees),
     costs, claims, demands, that Seller or its officers, directors, employees
     or agents may suffer, sustain or become subject to, or as a result of (i)
     any misrepresentation or breach of warranty, covenant of agreement of Buyer
     contained herein or (ii) the Buyer's negligence or willful misconduct.

          C. Where such personal injury, death or loss of or damage to property
     is the result of negligence on the part of both Seller and Buyer, each
     party's duty of indemnification shall be in proportion to the percentage of
     that party's negligence or faults.

          D. Seller acknowledges that in order to maximize the total revenue to
     be generated through the sale of the Products, Buyer may take positions by
     selling Product in anticipation of Seller providing the Products.
     Notwithstanding the fact that Seller's obligation is to provide Buyer with
     the output of the Plant the parties acknowledge that Buyer may suffer
     losses as a result of positions taken by Buyer if Seller discontinues
     operations for any reason whatsoever including Force Majeure. Therefore,
     Seller shall indemnify defend and hold Buyer and its officers, directors,
     employees and agents harmless from any and all losses, liabilities,
     damages, expenses (including reasonable attorney's fees), costs, claims,
     demands that Buyer or its officers, directors, employees, or agents may
     suffer, sustain or become subject to as a result of any sale or purchase of
     product taken by Buyer in anticipation of Seller delivering the Products
     hereunder, provided Buyer has taken commercially reasonable steps to avoid
     the loss. Seller shall not be liable for any loss resulting from Seller
     discontinuing operations related to a position taken by Buyer for delivery
     more than 90 days from the date of entering into a sale without the consent
     of Seller.

     16. GOVERNMENTAL ACTION. The parties recognize that the value of the
Products could change as a result of various governmental programs, be they
foreign or domestic. In the event that a significant value change of the
Products as a result of any such governmental program, Buyer may request
re-negotiation of the contract price for the Products by providing written
notice to Seller. Buyer shall be required to demonstrate that the value of the
Products has significantly changed in the market. Should such a change take
place, the parties agree to negotiate, in good faith, a revised sale price for
the Products. If, after a good faith effort, the parries are unable to agree on
a new price within the 90 day period immediately fallowing notice to the other
party, then in such event and notwithstanding the other provisions hereof, Buyer
may terminate this Agreement upon 90 days prior written notice.

                                        7

<PAGE>

     17. RELATIONSHIP OF PARTIES. This Agreement creates no relationship other
than that of buyer and seller between the parties hereto. Specifically, there is
no agency, partnership, joint venture or other joint or mutual enterprise or
undertaking created hereby. Nothing contained in this Agreement authorizes one
party to act for or on behalf of the other and neither party is entitled to
commissions from the other.

     18. MISCELLANEOUS.

          A. This writing is intended by the parties as a final expression of
     their agreement and a complete and exclusive statement of the terms
     thereof.

          B. No course of prior dealings between the parties and no usage of
     trade, except where expressly incorporated by reference, shall be relevant
     or admissible to supplement, explain, or vary any of the terms of this
     Agreement,

          C. Acceptance of, or acquiescence in, a course of performance rendered
     under this or any prior agreement shall not be relevant or admissible to
     determine the meaning of this Agreement even though the accepting or
     acquiescing party has knowledge of the nature or the performance and an
     opportunity to make objection.

          D. No representations, understandings or agreements have been made or
     relied upon in the making of this Agreement other than as specifically set
     forth herein.

          E. This Agreement can only be modified by a writing signed by all of
     the parties or their duly authorized agents.

          F. The paragraph headings herein are for reference purposes only and
     shall not in any way affect the meaning or interpretation of this
     Agreement.

          G. This Agreement shall be construed and performed in accordance with
     the laws of the State of Missouri.

          H. The respective rights, obligations and liabilities of the parties
     under this Agreement are not assignable or delegable without the prior
     written consent of the other party.

          I. Notice shall be deemed to have been given to the party to whom it
     is addressed ninety-six (96) hours after it is deposited in certified U.S.
     mail, postage prepaid, return receipt requested, addressed as follows:

               Buyer: Commodity Specialist Company
                      310 Grain Exchange Bldg.
                      400 South Fourth Street,
                      Minneapolis, MN 55415
                      ATTN: Steve J. Markham

                                        8

<PAGE>

               Seller:

     IN WITNESS THEREOF, the parties have caused this Agreement to be executed
the day and year first above written.

                                        COMMODITY SPECIALISTS COMPANY

                                        By: /s/ Philip J. Lindau
                                            ------------------------------------
                                        Title: EVP
                                               Philip J. Lindau

                                        Red Trail Energy LLC

                                        By: /s/ Ambrose R. Hoff
                                            ------------------------------------
                                            Ambrose R. Hoff

                                       9<PAGE>

                                                                    Exhibit 10.6

                         CONTRACT FOR PURCHASE OF COAL

     THIS AGREEMENT, Made and entered into this 9th day of March, 2004, by and
between RED TRAIL ENERGY, LLC (RTE) AND GENERAL INDUSTRIES, INC., D/B/A CENTER
Coal COMPANY (CENTER COAL).

     In consideration of the mutual covenants agreed to herein, Center Coal
agrees to deliver to RTE approximately 380 tons of lignite coal per day, such
delivery to commence prior to plant start up in the summer or fall of 2005, the
exact dates to be agreed upon by the parties. The contract shall run for a term
of 10 years from the commencement date agreed upon by the parties.

     Lignite Coal: The lignite coal will have a guaranteed analysis of 6,900
BTU's per pound, less than 10% ash, less than 1% sulfur, and less than 10%
sodium. The lignite will be sized 3/4" and smaller and shall contain no more
than 20% smaller than 1/8".

     Center Coal will also remove of and dispose of all ash from RTE. Center
Coal agrees to deliver approximately 133,000 tons of coal annually to RTE at
Richardton, North Dakota, and agrees to dispose of the ash in a timely and
efficient manner so as not to disrupt the operations of the plant.

     Price: RTE agrees to pay Center Coal in accordance with the following
schedule:

<TABLE>
<CAPTION>
 Year     2005     2006     2007     2008     2009     2010     2011     2012     2013     2014
 ----    ------   ------   ------   ------   ------   ------   ------   ------   ------   ------
<S>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>
Coal     $11.60   $11.65   $11.70   $11.75   $11.80   $11.85   $11.90   $11.95   $12.00   $12.05
Trking   $ 5.75   $ 5.75   $ 5.75   $ 5.75   $ 5.75   $ 5.95   $ 5.95   $ 5.95   $ 5.95   $ 5.95
         ------   ------   ------   ------   ------   ------   ------   ------   ------   ------
Total    $17.35   $17.40   $17.45   $17.50   $17.55   $17.80   $17.85   $17.90   $17.95   $18.00
         ======   ======   ======   ======   ======   ======   ======   ======   ======   ======
</TABLE>

     The above specified prices per ton will be adjusted upward or downward from
a base price of $1.55 per gallon of fuel, such adjustment to be a $.05 per ton
increase or decrease for each $.10 per gallon increase or decrease in the price
of fuel from the base price of $1.55 per gallon. This adjustment will be based
upon actual fuel invoices.

     Payment will be made on the 15th of the month following date of delivery at
the price agreed upon.

     Settlement for shipments in car load lots shall be made only on the basis
of railroad, state or weighing association weights at the point of delivery, or
truck scale weights at the point of delivery.

     Interruption: If the RTE plant shuts down, for any reason or cause, the
amount of coal which RTE would ordinarily consume will be reduced and such
amount shall be deducted from the amount of coal called for by this agreement.

                                       -1-

<PAGE>

     The delivery of the coal in a timely manner shall be considered the essence
of this agreement and in the case of the failure of Center Coal to do so, then
and in that event, and in addition to such other remedies as it may have, buyer
shall have the right, at its election, to cancel this contract. Acceptance of
any delivery by the buyer after such date, shall not be considered a waiver of
this right.

     Insurance: Center Coal shall at all times maintain liability insurance with
RTE named as an additional insured. In addition, Center Coal shall be liable to
RTE for actual damages and losses suffered by RTE in the event that Center coal
fails or is unable to deliver coal as agreed to herein, including any disruption
or interruption in delivery of coal. However, Center Coal shall not be liable if
the failure of delivery is caused by an Act of God or any other cause which is
beyond the control of Center Coal.

     Hold Harmless: Center Coal agrees to indemnify RTE and hold it harmless
from any loss, damage or liability, including reasonable attorney's fees,
arising out of or in connection with its performance of the terms of this
agreement.

     Quality: RTE shall have the right to suspend deliveries at any time for
delivery of coal that does not meet the specifications of this contract.

     Assignment of Contract: Center Coal may not assign, transfer or encumber
this contract, except by the express written consent of RTE, and then only
subject to all of the terms, conditions and provisions hereof.

     Penalty Clause: In the event that Center Coal fails to deliver 380 tons of
lignite per day, Center Coal shall be penalized and shall forfeit to RTE the sum
of $1,500 per day for all days when RTE had ordered coal and had expected
delivery of such coal, unless the failure or inability to deliver is caused by
an Act of God or any other cause which is beyond the control of Center Coal.

     Time of the Essence: Time is deemed to be of the very essence of this
agreement and contract.

     Binding Effect: It is mutually agreed by and between the parties that the
covenants and agreements herein contained shall extend to and be obligatory upon
the successors and assigns of the respective parties.

     Entire Contract: This Agreement constitutes the entire contract between the
parties hereto and there are no other undertakings, representations or
warranties, oral or written, relating to the subject matter hereof and neither
party has relied upon any verbal representations, agreements or undertakings not
set forth herein, whether made by any agent or party hereto. This agreement may
not be changed, modified or amended, in whole or in part, except in writing
signed by all parties hereto.

     Law: This agreement shall be interpreted in accordance with the laws of the
State of North Dakota.

                                       -2-

<PAGE>

     Waiver: Neither the extension of time for delivery of coal nor the waiver
by RTE of its right to declare this contract canceled by reason of any breach of
the contract, shall in any manner affect the right of RTE to declare this
agreement forfeited because of any default subsequently occurring, and no
extension of time shall be valid unless evidenced by a duly signed agreement.

     Dated this 9 day of March, 2004.

                                        RED TRAIL ENERGY, LLC

                                        By: /s/ Ambrose R. Hoff
                                            ------------------------------------
                                            Ambrose R. Hoff, its President

                                        GENERAL INDUSTRIES, INC., d/b/a
                                        CENTER COAL COMPANY

                                        By: /s/ Gregg Baranko
                                            ------------------------------------
                                            Gregg Baranko, its President

                                       -3-

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