Document:

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                                                                    Exhibit 10.3

                           STANDARD FORM OF AGREEMENT
                           BETWEEN OWNER AND ENGINEER
                                       FOR
                              PROFESSIONAL SERVICES

This AGREEMENT is made by and Siouxland Ethanol, LLC, hereinafter called OWNER,
and ANTIOCH International, Inc., hereinafter called ENGINEER, for professional
services not presently specified under any other agreement between OWNER and
ENGINEER. ENGINEER agrees to provide OWNER with requested professional services
more specifically described as follows:

   ENGINEERING DESIGN SERVICES FOR A SPUR TRACK SERVING THE ETHANOL PLANT AT
                                  JACKSON, NE.

The following Attachments are hereby made a part of the AGREEMENT:
X    Standard Terms and Conditions
X    Exhibit A: ENGINEER'S Services
X    Exhibit B: OWNER'S Responsibilities
X    Exhibit C: Payments to ENGINEER for Services and Reimbursable Expenses
X    Appendix 1: Hourly Billing Rates and Reimbursable Expenses

By signing this AGREEMENT, OWNER acknowledges that it has read and fully
understands this AGREEMENT and all attachments thereto. OWNER further agrees to
pay ENGINEER for services described herein upon receipt of invoice.

IN WITNESS WHEREOF, the parties hereto have made and executed this AGREEMENT.

                OWNER                                   ENGINEER

SIOUXLAND ETHANL, LLC                   ANTIOCH INTERNATIONAL, INC.

BY: /s/ Tom Lynch                       BY: /s/ William J. Jones
    ---------------------------------       ------------------------------------
    Authorized Representative               Authorized Representative

TITLE: President                        TITLE: President

EFFECTIVE DATE: 11-5-04                 DATE: November 2, 2004

ADDRESS:                                ADDRESS:
P.O. Box 158                            2540 South 221st Circle
Homer, NE 68030                         Elkhorn, NE 68022
Telephone: 712-251-0302                 Telephone: 402-289-2217
OWNER's Contact: Pam Miller             ENGINEER'S Contact: William J. Jones
                                        Job No.: 98-112

                 PLEASE SIGN AND RETURN ONE ORIGINAL TO ENGINEER

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                         EXHIBIT A - ENGINEER'S SERVICES

Section 1 of the Standard Terms and Conditions is amended and supplemented to
include the following agreement of the parties. ENGINEER shall provide Basic and
Additional Services as set forth below.

                             PART 1 - BASIC SERVICES

STUDY AND REPORT PHASE

ENGINEER shall:

1.   Consult with OWNER to define and clarify OWNER'S requirements for the
     Project and available data.

2.   Advise OWNER as to the necessity of OWNER'S providing data or services
     which are not part of ENGINEER'S Basic Services, and assist OWNER in
     obtaining such data and services.

3.   Identify, consult with, and analyze requirements of governmental
     authorities having jurisdiction to approve the portions of the Project
     designed or specified by ENGINEER.

4.   Identify and evaluate up to three alternate solutions available to OWNER
     and, after consultation with OWNER, recommend to OWNER those solutions with
     in ENGINEER'S judgment meet OWNER'S requirements for the Project.

5.   Prepare a report (the "Report") which will, as appropriate, contain
     schematic layouts, sketches and conceptual design criteria with appropriate
     exhibits to indicate the agreed-to requirements, considerations involved,
     and those alternate solutions available to OWNER which ENGINEER recommends.
     This Report will be accompanied by ENGINEER'S opinion of Total Project
     Costs for each solution which is so recommended for the Project with each
     component separately itemized, including the following, which will be
     separately itemized: opinion of probable Construction Cost, allowances for
     contingencies and for the estimated total costs of design, professional,
     and related services provided by ENGINEER and, on the basis of information
     furnished by OWNER, allowances for other items and services included within
     the definition of Total Project Costs.

6.   Perform or provide the following additional Study and Report tasks or
     deliverables:

          -    Prepare a conceptual track plan constructible in stages to
               accommodate the initial 50 MMG plant design as well as the future
               track for plan expansion to 100 MMG.

          -    Service by the main line railroad is planned once a week.

          -    The initial track construction concept (50 MMG) will be
               configured to handle 35 ethanol tank cars plus 35 DDG hopper cars
               per service interval.

          -    At 100 MMG production, 100% of ethanol & DDGS products
               transported by rail will generate 70 tank cars & 70 hopper cars
               each week.

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          -    Track configuration must provide for traffic ingress/egress from
               both east and west from the plan site.

          -    Current mainline traffic is 2 trains per day.

          -    Coordinate track design with the mainline railroads and Fagen
               Engineering LLC.

7.   Furnish two review copies of the Report to OWNER within 14 days of
     authorization to proceed with Study and Report Phase.

8.   Revise the Report in response to OWNER'S and other parties' comments, as
     appropriate, and furnish two final copies of the revised Report to the
     OWNER within 7 days after completion of reviewing it with OWNER.

ENGINEER'S services under the Study and Report Phase will be considered complete
on the date when the final copies of the revised Report have been delivered to
OWNER.

PRELIMINARY DESIGN PHASE - GRADING WORK

After acceptance by OWNER of the Report, selection by OWNER of a recommended
solution and indication of any specific modifications or changes in the scope,
extent, character, or design requirements of the Project desired by OWNER, and
upon written authorization from OWNER, ENGINEER shall:

1.   On the basis of the above acceptance, selection, and authorization, prepare
     Preliminary Design Phase documents consisting of design criteria,
     preliminary drawings, and written descriptions of the Project.

2.   OWNER to provide necessary field surveys, bench marks, topographic and
     utility mapping for design purposes. Utility mapping will be based upon
     topographic surveys and information obtained from utility owners. OWNER
     shall accomplish field and topographic surveys, and prepare a topographic
     map of surface features and ground contours in the project area.

3.   Advise OWNER of additional reports, data, information, or services of the
     types described in Exhibit B are necessary and assist OWNER in obtaining
     such reports, data, information, or services.

4.   Based on the information contained in the Preliminary Design Phase
     documents, submit an opinion of probable Construction Cost known to
     ENGINEER.

5.   Perform or provide the following Preliminary Design Phase tasks or
     deliverables: ENGINEER shall refine the conceptual track work plans, and
     prepare plans in sufficient detail to accomplish the grading work,
     generally described as follows:

     GRADING WORK:

          -    Subgrade geometry & stationing based on the project coordinate
               system.

          -    Match line between railroad subgrade and plant subgrade.

          -    Top of rail profile.

          -    Grading contour plan.

          -    Grading sections at 100' intervals.

          -    Special ditching elevations.

          -    Locations of service roads.

          -    Typical grading cross sections

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          -    Subgrade staking report.

          -    Culvert plans showing length, flowline elevations & end
               treatments.

          -    Yard track drainage inlets and piping plan.

          -    Erosion control plan

          -    Subballast plan.

6.   Deliverables: drawing and notes indicating the general character of work to
     be performed; preliminary cost estimate and identification of unresolved
     final design features. ENGINEER shall not be responsible for those portions
     of the Work performed by others.

7.   Furnish two sets of Preliminary Design Phase documents to, and review them
     with, OWNER or OWNER'S Consultant within 30 days after authorization to
     proceed with the Preliminary Design Phase. OWNER'S Consultant to prepare
     the Grading Work bidding documents and construction specifications.

8.   Revise Preliminary Design Phase documents in response to OWNER'S and other
     parties' comments, as appropriate, and furnish two final copies of the
     revised Report to the OWNER within 7 days after completion of reviewing it
     with OWNER.

ENGINEER'S services under the Preliminary Design Phase will be considered
complete on the date when revised copies of the Preliminary Design Phase
documents have been delivered by OWNER.

FINAL DESIGN PHASE

After acceptance by OWNER of the Preliminary Design Phase documents and revised
opinion of probable Construction Cost as determined in the Preliminary Design
Phase, but subject to any OWNER-directed modifications or changes in the scope,
extent, character, or design requirements of or for the Project, and upon
written authorization from OWNER, ENGINEER shall:

1.   On the basis of the above acceptance, direction, and authorization, prepare
     final Drawings and Specifications indicating the scope, extent, and
     character of the Work to be performed and furnished by Contractor.

2.   Provide technical criteria, written descriptions, and design data for
     OWNER'S use in filing applications for permits from or approvals of
     governmental authorities having jurisdiction to review or approve the final
     design of the Project and assist OWNER in consultations with appropriate
     authorities.

3.   Advise OWNER of any adjustments to the opinion of probable Construction
     Cost and any adjustments to Total Project Costs known to ENGINEER.

4.   Perform or provide the following Final Design Phase tasks or deliverables:

          -    Track geometry & stationing based on the project coordinate
               system for the initial 50 MMG & the future 100 MMG track layouts.

          -    Railroad mile posts & 14' clearance points for mainline turnouts.

          -    Location & size of existing & new turnouts, derails & bumping
               posts.

          -    Show present & proposed buildings including unloading doors,
               ramps and loadouts from information provided by OWNER.

          -    Horizontal & vertical clearances.

          -    Loadout sequence.

          -    Location of overhead & buried utilities with dimension to top of
               rail.

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          -    Location of fencing & gates.

          -    Location, length & type of grading crossings.

          -    Traffic control & signing plan for grade crossings.

          -    Traffic control & signing plan for grade crossings.

          -    Typical track cross section and walkway details

          -    Construction sequencing plan.

          -    Track construction notes & details.

          -    Track construction specifications.

          -    Final Design plan check with OWNER at project site, if requested.

5.   Final Design Phase documents: drawings, notes and specifications indicating
     the specific character of work to be performed; final opinion of cost; and
     estimated construction quantities in sufficient detail to construct the
     planned facility. Final plans shall meet the requirements of the mainline
     and other entities, if any, having jurisdiction over the planned facility.
     ENGINEER shall not be responsible for those portions of the Work performed
     by others.

6.   Furnish two sets of Final Design Phase documents to and review them with
     OWNER within 30 days after authorization to proceed with the Final Design
     Phase.

7.   Revise the Report in response to OWNER'S and other parties' comments, as
     appropriate, and furnish two final copies of the revised Report to the
     OWNER within 7 days after completion of reviewing it with OWNER.

In the event that the Work designed or specified by ENGINEER is to be performed
or furnished under more than one prime contract, or if ENGINEER's services are
to be separately sequenced with the work of one or more prime Contractors (such
as in the case of fast-tracking), OWNER and ENGINEER shall, prior to
commencement of the Final Design Phase, develop a schedule for performance of
ENGINEER'S services during the Final Design, Bidding or Negotiating,
Construction, and Post-Construction Phases in order to sequence and coordinate
properly such services as are applicable to the work under such separate prime
contracts. This schedule is to be prepared and included in or become as
amendment to Exhibit A whether or not the work under such contracts is to
proceed concurrently. The number of prime contracts for Work designed or
specified by ENGINEER upon which the ENGINEER'S compensation has been
established under this agreement is one.

ENGINEER'S services under the Final Design Phase will be considered complete on
the date when the Final Design Phase documents have been delivered to OWNER.

                                       END

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                      EXHIBIT B - OWNER'S RESPONSIBILITIES

Section 2 of the Standard Terms and Conditions is amended and supplemented to
include the following agreement of the parties.

In addition to other responsibilities of OWNER as set forth in this Agreement,
OWNER shall:

A.   Provide ENGINEER with all criteria and full information as to OWNER's
     requirements for the Project, including design objectives and constraints,
     space, capacity and performance requirements, flexibility, and
     expandability, and any budgetary limitations; and furnish copies of all
     design and construction standards which OWNER will require to be included
     in the Drawings and Specifications; and furnish copies of OWNER's standard
     forms, conditions, and related documents for ENGINEER to include in the
     Bidding Documents, when applicable.

B.   Furnish to ENGINEER any other available information pertinent to the
     Project including reports and data relative to previous designs, or
     investigation at or adjacent to the Site.

C.   Following ENGINEER's assessment of initially-available Project information
     and data and upon ENGINEER's request, furnish or otherwise make available
     such additional Project related information and data as is reasonably
     required to enable ENGINEER to complete its Basic and Additional Services.
     Such additional information or data would generally include the following:

     1.   Property descriptions.

     2.   Zoning, deed, and other land use restrictions

     3.   Property, boundary, easement, right-of-way, and other special surveys
          or data, including establishing relevant reference points.

     4.   Explorations and tests of subsurface conditions at or contiguous to
          the Site, drawings of physical conditions in or relating to existing
          surface or subsurface structures at or contiguous to the Site, or
          hydrographic surveys, with appropriate professional interpretation
          thereof.

     5.   Environmental assessments, audits, investigations and impact
          statements, and other relevant environmental or cultural studies as to
          the Project, the Site, and adjacent areas.

     6.   Data or consultations as required for the Project but not otherwise
          identified in the Agreement or the Exhibits thereto.

D.   Give prompt written notice to ENGINEER whenever OWNER observes or otherwise
     becomes aware of a Hazardous Environmental Condition or of any other
     development that affects the scope or time of performance of ENGINEER's
     services, or any defect or nonconformance in ENGINEER's services or in the
     work of any Contractor.

E.   Authorize ENGINEER to provide Additional Services as set forth in Part 2 of
     Exhibit A of the Agreement as required.

F.   Arrange for safe access to and make all provisions for ENGINEER to enter
     upon public and private property as required for ENGINEER to perform
     services under the Agreement.

G.   Examine all alternate solutions, studies, reports, sketches, Drawings,
     Specifications, proposals, and other documents presented by ENGINEER
     (including obtaining advice of an attorney, insurance counselor, and other
     advisors or consultants as OWNER deems appropriate with respect to such
     examination) and render in writing timely decisions pertaining thereto.

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H.   Provide reviews, approvals, and permits from all governmental authorities
     having jurisdiction to approve all phases of the Project designed or
     specified by ENGINEER and such reviews, approvals, and consents from others
     as may be necessary for completion of each phase of the Project.

I.   Provide, as required for the Project:

     1.   Accounting, bond and financial advisory, independent cost estimating,
          and insurance counseling services.

     2.   Legal services with regard to issues pertaining to the Project as
          OWNER requires, Contractor raises, or ENGINEER reasonably requests.

     3.   Such auditing services as OWNER requires to ascertain how or for what
          purpose Contractor has used the moneys paid.

     4.   Placement and payment for advertisement for Bids in appropriate
          publications.

J.   Advise ENGINEER of the identify and scope of services of any independent
     consultants employed by OWNER to perform or furnish services in regard to
     the Project, including, but not limited to, cost estimating, project peer
     review, value engineering, and constructability review.

K.   Furnish to ENGINEER data as to OWNER's anticipated costs for services to be
     provided by others for OWNER so that ENGINEER may make the necessary
     calculations to develop and periodically adjust ENGINEER's opinion of Total
     Project Costs.

L.   If OWNER designates a construction manager or an individual or entity other
     than, or in addition to, ENGINEER to represent OWNER at the Site, define
     and set forth as an attachment to this Exhibit B the duties,
     responsibilities, and limitations of authority of such other party and the
     relation thereof to the duties, responsibilities, and authority of
     ENGINEER.

M.   If more than one prime contract is to be awarded for the Work designed or
     specified by ENGINEER, designate a person or entity to have authority and
     responsibility for coordinating the activities among the various prime
     Contractors, and define and set forth the duties, responsibilities, and
     limitations or authority of such individual or entity and the relation
     thereof to the duties, responsibilities, and authority of ENGINEER as an
     attachment to this Exhibit B that is to be mutually agreed upon and made a
     part of this Agreement before such services begin.

N.   Attend the pre-bid conference, bid opening, pre-construction conferences,
     construction progress and other job related meetings, and Substantial
     Completion and final payment inspections.

O.   Provide the services of an independent testing laboratory to perform all
     inspections, tests, and approvals of Samples, materials, and equipment
     required by the Contract Documents, or to evaluate the performance of
     materials, equipment, and facilities of OWNER, prior to their incorporation
     into the Work with appropriate professional interpretation thereof.

P.   Provide inspection or monitoring services by an individual or entity other
     than ENGINEER (and disclose the identity of such individual or entity to
     ENGINEER) as OWNER determines necessary to verify:

     1.   That Contractor is complying with any Laws and Regulations applicable
          to Contractor's performing and furnishing the Work.

     2.   That Contractor is taking all necessary precautions for safety of
          persons or property and complying with any special provisions of the
          Contract Documents applicable to safety.

Q.   Provide ENGINEER with the findings and reports generated by the entities
     providing services pursuant to paragraphs O and P.

R.   Provide ENGINEER with soils borings and geotechnical engineering data.

S.   Schedule and conduct public meetings and hearings.

                                       END

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     EXHIBIT C - PAYMENT TO ENGINEER FOR SERVICES AND REIMBURSABLE EXPENSES

Article 4 of the Standard Terms and Conditions is amended and supplemented to
include the following agreement of the parties.

                      ARTICLE 4 - PAYMENTS TO THE ENGINEER

For Basic and Additional Services Having an Undetermined Scope - Standard Hourly
Rates Method of Payment

OWNER shall pay ENGINEER for Basic and Additional Services set forth in Exhibit
A having an undetermined scope as follows:

1. The total compensation for services under this paragraph is estimate to be $
5,000.00 based on the following assumed distribution of compensation:

     a. Study & Report Phase (assume 50 hrs.) $5,000.00

2. ENGINEER may alter the distribution of compensation between the individual
phases noted herein to be consistent with services actually rendered, but shall
not exceed the total compensation amount unless approved in writing by the
OWNER.

3. The total compensation for ENGINEER'S services, included in the breakdown by
phases as noted in paragraph 1, incorporates all labor, overhead profit,
Reimbursable Expenses, and ENGINEER'S Consultant's charges.

4. For services of ENGINEER'S employees engaged directly on the Project pursuant
to Exhibit A, an amount equal to the cumulative hours charged to the Project by
each class of ENGINEER'S employees times the Standard Hourly Rates for each
applicable class, plus Reimbursable Expenses. Standard Hourly Rates are attached
to this Exhibit C and include salaries and wages paid to personnel in each
billing class plus the cost of customary and statutory benefits, general and
administrative overhead, non-project operating costs, and operating margin or
profit.

6. Reimbursable Expenses are attached to this Exhibit C and include the
Project-related internal expenses actually incurred or allocated by the
ENGINEER, plus all invoiced external Reimbursable Expenses allocable to the
Project.

7. ENGINEER'S estimate of the amounts that will become payable are only
estimates for planning purposes, are not binding on the parties, and are not the
minimum or maximum amounts payable to the ENGINEER under the Agreement. When
estimate compensation amounts have been stated herein and it subsequently
becomes apparent to ENGINEER that an estimated compensation amount will be
exceeded, ENGINEER shall give OWNER written notice thereof. Promptly thereafter
OWNER and ENGINEER shall review the matter of services remaining to be performed
and compensation for such services. OWNER shall either agree to such
compensation exceeding said estimated amount or OWNER and ENGINEER shall agree
to

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a reduction in remaining services to be rendered by ENGINEER, so that total
compensation for services will not exceed the estimated amount when services are
completed. If ENGINEER exceeds the estimated amount before OWNER and ENGINEER
had agreed to an increase in compensation, or a reduction in services, the
ENGINEER shall be paid for all services rendered hereunder.

8. Standard Hourly Rates and Reimbursable Expense schedules will be adjusted
annually to reflect equitable changes in compensation payable to ENGINEER.

For Basic Services Having a Determined Scope - Lump Sum Method of Payment

OWNER shall pay ENGINEER for Basic Services set forth in Exhibit A, Part 1
except for Study and Report Phase and services of ENGINEER'S Resident Project
Representative and Post-Construction Phase services, if any, as follows:

1.   Lump Sum fee representing 3.00% of the estimated track construction cost
     to be determined in Phase 1 - Study & Report, based on the following
     assumed distribution of compensation:

          a. Study and Report Phase                     See Hourly Payment
          b. Preliminary Design Phase- Grading Design   To Be Determined
          c. Final Design Phase- Track Design           To Be Determined
          d. Additional Services                        Not Included
          e. Bidding and Negotiating Phase              Not Included
          f. Construction Phase                         Not Included

2.   ENGINEER may alter the distribution of compensation between individual
     phases noted herein to be consistent with services actually rendered, but
     shall not exceed the total Lump Sum amount unless approved in writing by
     the OWNER.

3.   The Lump Sum includes compensation for ENGINEER's services and services of
     ENGINEER's Consultants, if any. Appropriate amounts have been incorporated
     in the Lump Sum to account for labor, overhead, profit, and Reimbursable
     Expenses. ENGINEER assumes full responsibility for, and shall pay, all
     contributions and taxes payable under federal and state social security
     acts, unemployment compensation laws, and income tax laws applicable to
     ENGINEER and its employees.

4.   The portion of the Lump Sum amount billed for ENGINEER' services will be
     based upon ENGINEER's estimate of the proportion of the total services
     actually completed during the billing period to the Lump Sum.

5.   The Lump Sum is conditioned on Contract Times to complete the Work not
     exceeding six months. Should the Contract Times to complete the Work be
     extended beyond this period, the total compensation to ENGINEER shall be
     appropriately adjusted.

                                       END

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                          STANDARD TERMS AND CONDITIONS

                             1. SERVICES OF ENGINEER

A.   ENGINEER shall provide the Basic and Additional Services set forth herein
     and in Exhibit A.

B.   Upon this Agreement becoming effective, ENGINEER is authorized to begin
     Basic Services as set forth in Exhibit A.

                           2. OWNER'S RESPONSIBILITIES

OWNER shall have the responsibilities set forth herein and in Exhibit B.

                         3. TIMES FOR RENDERING SERVICES

A.   If in this Agreement specific periods of time for rendering services are
     set forth or specific dates by which services are to be completed are
     provided, and if such periods of time or dates are changed through no fault
     of ENGINEER, the rates and amounts of compensation provided for herein
     shall be subject to equitable adjustment. If OWNER has requested changes in
     the scope, extent, or character of the Project, the time of performance of
     ENGINEER's services shall be adjusted equitably.

B.   Suspension. If OWNER fails to give prompt written authorization to proceed
     with any phase of services after completion of the immediately preceding
     phase, or if ENGINEER's services are delayed through no fault of ENGINEER,
     ENGINEER may, after giving seven days written notice to OWNER, suspend
     services under this Agreement.

                             4. PAYMENTS TO ENGINEER

A.   Preparation and Payment of Invoices. Invoices will be prepared in
     accordance with ENGINEER's standard invoicing practices. Invoices are due
     and payable upon receipt. If OWNER fails to make any payment due ENGINEER
     for services and expenses within 30 days after receipt of ENGINEER's
     invoice therefore, the amounts due ENGINEER will be increased at the rate
     of 1.0% per month (or the maximum rate of interest permitted by law, if
     less) for said thirtieth day. In addition, ENGINEER may, after giving seven
     days written notice to OWNER, suspend services under this Agreement until
     ENGINEER has been paid in full all amounts due for services, expenses, and
     other related charges. Payments will be credited first to interest and then
     to principal.

B.   Disputed Invoices. In the event of a disputed or contested invoice, only
     that portion so contested may be withheld from payment, and the undisputed
     portion will be paid.

C.   Payments Upon Termination. In the event of any termination under Section 6
     - General Conditions, ENGINEER will be entitled to invoice OWNER and will
     be paid in accordance with Exhibit C for all services performed or
     furnished and all Reimbursable Expenses incurred through the effective date
     of termination.

D.   Records of ENGINEER's Costs. Records of ENGINEER's costs pertinent to
     ENGINEER's compensation under this Agreement shall be kept in accordance
     with generally accepted accounting practices. To the extent necessary to
     verify ENGINEER's charges and upon OWNER's timely request, copies of such
     records will be made available to OWNER at cost.

<PAGE>

                               5. OPINIONS OF COST

ENGINEER's opinions of probable Construction Cost provided for herein are to be
made on the basis of ENGINEER's experience and qualifications and represent
ENGINEER's best judgment as an experienced and qualified professional generally
familiar with the industry. ENGINEER cannot and does not guarantee that
proposals, bids, or actual Construction Cost will not vary from opinions of
probable Construction Cost prepared by ENGINEER. If OWNER wishes greater
assurance as to probable Construction Cost, OWNER shall employ an independent
cost estimator in provided in Exhibit B.

                            6. GENERAL CONSIDERATIONS

STANDARDS OF PERFORMANCE

A.   The standard of care for all professional engineering and related services
     performed or furnished by ENGINEER under this Agreement will be the care
     and skill ordinarily used by members of ENGINEER's profession practicing
     under similar circumstances at the same time and in the same locality.
     ENGINEER makes no warranties, express or implied, under this Agreement or
     otherwise, in connection with ENGINEER's services.

B.   ENGINEER and OWNER shall comply with applicable Laws or Regulations and
     OWNER-mandated standards. Changes to these requirements after the Effective
     Date of this Agreement may be the basis for modifications to OWNER's
     responsibilities or to ENGINEER's scope of services, times of performance,
     or compensation.

C.   OWNER shall be responsible for, and ENGINEER may rely upon, the accuracy
     and completeness of all requirements, programs, instructions, reports,
     data, and other information furnished by OWNER to ENGINEER pursuant to this
     Agreement. ENGINEER may use such requirements, reports, data, and
     information in performing or furnishing services under this Agreement.

D.   ENGINEER shall not be responsible for the acts or omissions of any
     Contractor(s), subcontractor or supplier, or of any of the Contractor's
     agents or employees or any other persons (except ENGINEER's own employees)
     at the Site or otherwise furnishing or performing any of the Contractor's
     work; or for any decision made on interpretations or clarifications of the
     Contract Documents given by OWNER without consultation and advice of
     ENGINEER.

E.   ENGINEER shall keep confidential all information, drawings, specifications
     or data furnished by OWNER or prepared by ENGINEER specifically in
     connection with this Agreement.

F.   ENGINEER shall comply with applicable Federal, State and local laws,
     ordinances, regulations, rules and orders relating to the environment and
     occupational health and safety. ENGINEER shall not be responsible for
     safety and health of any persons on the Project except ENGINEER's own
     employees.

USE OF DOCUMENTS

A.   All Documents are instruments of service in respect to this Project, and
     ENGINEER shall retain an ownership and property interest therein (including
     the right of reuse at the discretion of the ENGINEER) whether or not the
     Project is completed.

B.   Copies of Documents that may be relied upon by OWNER are limited to the
     printed copies (also known as hard copies) that are signed or sealed by the
     ENGINEER. Files in electronic

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     media format of text, data, graphics, or of other types that are furnished
     by ENGINEER to OWNER are only for convenience of OWNER. Any conclusion or
     information obtained or derived from such electronic files will be at the
     user's sole risk. If there is a discrepancy between the electronic files
     and the hard copies, the hard copies govern.

C.   OWNER may make and retain copies of Documents for information and reference
     in connection with use on the Project by OWNER. Such Documents are not
     intended or represented to be suitable for reuse by OWNER or others on
     extensions of the Project or on any other project. Any such reuse or
     modification without written verification or adaptation by ENGINEER, as
     appropriate for the specific purpose intended, will be at OWNER's sole risk
     and without liability or legal exposure to ENGINEER or to ENGINEER's
     Consultants. OWNER shall indemnify and hold harmless ENGINEER and
     ENGINEER's Consultants from all claims, damages, losses and expenses,
     including attorneys' fees arising out of or resulting therefrom.

INSURANCE

A.   ENGINEER shall procure and maintain insurance as set forth in Exhibit G,
     "Insurance".

B.   OWNER shall procure and maintain insurance as set forth in Exhibit G,
     "Insurance". OWNER shall cause ENGINEER and ENGINEER's Consultants to be
     listed as additional insureds on any general liability or property
     insurance policies carried by OWNER which are applicable to the Project.

C.   OWNER and ENGINEER shall each deliver to the other certificates of
     insurance evidencing the coverages indicated in Exhibit G. Such
     certificates shall be furnished prior to commencement of ENGINEER's
     services and at renewals thereafter during the life of the Agreement.

TERMINATION

A.   The obligation to provide further services under this Agreement shall be
     terminated:

     1.   For cause,

          a.   By either party upon 30 days written notice in the event of
               substantial failure by the other party to perform in accordance
               with the terms hereof through no fault of the terminating party.

          b.   By ENGINEER, upon seven days written notice if ENGINEER believes
               that ENGINEER is being requested by OWNER to furnish or perform
               services contrary to ENGINEER's responsibilities as a licensed
               professional or, upon seven days written notice if the ENGINEER's
               services for the Project are delayed or suspended for more than
               90 days for reasons beyond ENGINEER's control. ENGINEER shall
               have no liability to OWNER on account of such termination.

     2.   For convenience,

          a.   By OWNER effective upon the receipt of notice by ENGINEER.

CONTROLLING LAW

This Agreement is to be governed by the law of the state of Nebraska.

SUCCESSORS, ASSIGNS, AND BENEFICIARIES

A.   OWNER and ENGINEER each is hereby bound and the partners, successors,
     executors, administrators and legal representatives of OWNER and ENGINEER
     (and to the extent

<PAGE>

     permitted by the following paragraph the assigns of OWNER and ENGINEER) are
     hereby bound to the other party to this Agreement and to the partners,
     successors, executors, administrators and legal representatives (and said
     assigns) of such other party, in respect of all covenants, agreements and
     obligations of this Agreement.

B.   Neither OWNER nor ENGINEER may assign, sublet, or transfer any rights under
     or interest (including, but not without limitation, moneys that are due or
     may become due) in this Agreement without the written consent of the other,
     except to the extent that any assignment, subletting, or transfer is
     mandated or restricted by law. Unless specifically stated to the contrary
     in any written consent to an assignment, no assignment will release or
     discharge the assignor from any duty or responsibility under this
     Agreement.

HAZARDOUS ENVIRONMENTAL CONDITION

A.   OWNER represents to ENGINEER that to the best of its knowledge a Hazardous
     Environmental Condition does not exist. It is acknowledged by both parties
     that ENGINEER's scope of services does not include any services related to
     a Hazardous Environmental Condition. If a Hazardous Environmental Condition
     is encountered or alleged, ENGINEER shall have the obligation to notify
     OWNER and, to the extent of applicable Laws and Regulations, appropriate
     governmental officials.

B.   OWNER acknowledges that ENGINEER is performing professional services for
     OWNER and that ENGINEER is not and shall not be required to become an
     "arranger", "operator," "generator", or "transporter" of hazardous
     substances, as defined in the Comprehensive Environmental Response,
     Compensation, and Liability Act of 1990 (CERCLA), which are or may be
     encountered at or near the Site in connection with ENGINEER's activities
     under this Agreement.

ALLOCATION OF RISK

Indemnification:

A.   To the fullest extent permitted by law, ENGINEER and OWNER shall indemnify
     and hold harmless each other, their officers, directors, partners, and
     employees from and against any and all costs, losses, and damages
     (including but not limited to all fees and charges of engineers,
     architects, attorneys, and other professionals, and all court or
     arbitration or other dispute resolution costs) caused solely by the their
     negligent acts or omissions or those of their officers, directors,
     partners, employees, and consultants with respect to this Agreement.

B.   To the fullest extent permitted by law, ENGINEER's total liability to OWNER
     and anyone claiming by, through, or under OWNER for any cost, loss or
     damages caused in part by the negligence of ENGINEER and in part by the
     negligence of OWNER or any other negligent entity or individual, shall not
     exceed the percentage share that ENGINEER's negligence bears to the total
     negligence of OWNER, ENGINEER, and all other negligent entities and
     individuals.

C.   In addition, OWNER shall indemnify and hold harmless ENGINEER and its
     officers, directors, partners, employees, and ENGINEER's Consultants from
     and against all costs, losses, and damages caused by, arising out of or
     resulting from a Hazardous Environmental Condition.

ENGINEER'S Liability Limited to Amount of ENGINEER's Compensation: To the
fullest extent permitted by law, and notwithstanding any other provision of this
Agreement, the total

<PAGE>

liability, in the aggregate, of ENGINEER and ENGINEER's officers, directors,
partners, employees, agents, and ENGINEER's Consultants, and any of them, to
OWNER and anyone claiming by, through, or under OWNER for any and all claims,
losses, costs, or damages whatsoever arising out of, resulting from or in any
way related to the Project or the Agreement from any cause or causes, including
but not limited to the negligence, professional errors or omissions, strict
liability or breach of contract, or warranty express of implied of ENGINEER or
ENGINEER's officers, directors, partners, employees, agents, or ENGINEER's
Consultants, or any of them, shall not exceed the total compensation received by
ENGINEER under this Agreement.

NOTICES

Any notice required under this Agreement will be in writing, addressed to the
appropriate party at its address on the signature page and given personally, or
by registered or certified mail postage prepaid, or by a commercial courier
services. All notices shall be effective upon the date of receipt.

SURVIVAL

All express representations, indemnifications, or limitations of liability
included in this Agreement will survive its completion or termination for any
reason.

SEVERABILITY

Any provision or part of the Agreement held to be void or unenforceable under
any Laws or Regulations shall be deemed stricken, and all remaining provisions
shall continue to be valid and binding upon OWNER and ENGINEER, who agree that
the Agreement shall be reformed to replace such stricken provision or part
thereof with a valid and enforceable provision that comes as close as possible
to expressing the intention of the stricken provision.

WAIVER

Non-enforcement of any provision by either party shall not constitute a waiver
of that provision, nor shall it affect the enforceability of that provision or
of the remainder of this Agreement.

                                 7. DEFINITIONS

DEFINED TERMS

Wherever used in this Agreement (including the Exhibits hereto) and printed with
initial or all capital letters, the terms listed below have the meanings
indicated, which are applicable to both the singular and plural thereof:

1.   Addenda - Written or graphic instruments issued prior to the opening of
     Bids which clarify, correct, or change the Bidding Documents.

2.   Agreement - This "Standard Form of Agreement between OWNER and ENGINEER for
     Professional Services," including Exhibits.

3.   Bid - The offer or proposal of the bidder submitted on the prescribed form
     setting forth the prices for the Work to be performed.

4.   Bidding Documents - The advertisement or invitation to Bid, instructions to
     bidders, the Bid form and attachments, the Bid bond, if any, the proposed
     Contract Documents, and all Addenda, if any.

<PAGE>

5.   Construction Cost - The cost to OWNER of those portions of the entire
     Project designed or specified by ENGINEER. Construction Cost does not
     include costs of services of ENGINEER or other design professionals and
     consultants, cost of land, rights-of-way, or compensation for damages to
     properties, or OWNER's costs for legal, accounting, insurance counseling or
     auditing services, or interest and financing charges incurred in connection
     with the Project, or the cost of other services to be provided by others to
     OWNER pursuant to Exhibit B of this Agreement. Construction Cost is one of
     the items comprising Total Project Costs.

6.   Contract Documents - Documents that establish the rights and obligations of
     the parties engaged in construction and include the Construction Agreement
     between OWNER and Contractor, Addenda (which pertain to the Contract
     Documents), Contractor's Bid (including documentation accompanying the Bid
     and any post-Bid documentation submitted prior to the notice of award) when
     attached as an exhibit to the Construction Agreement, the notice to
     proceed, the bonds, appropriate certifications, the General Conditions, the
     Supplementary Conditions, the Specifications and the Drawings as the same
     are more specifically identified in the Construction Agreement, together
     with all Written Amendments, Change Orders, Work Change Directives, Field
     Orders, and ENGINEER's written interpretations and clarifications issued on
     or after the Effective Date of the Construction Agreement. Approved Shop
     Drawings and the reports and drawings of subsurface and physical conditions
     are not Contract Documents.

7.   Documents - Data, reports, Drawings, Specifications, Record Drawings, and
     other deliverables, whether in printed or electronic media format, provided
     or furnished in appropriate phases by ENGINEER to OWNER pursuant to this
     Agreement.

8.   Drawings - That part of the Contract Documents prepared or approved by
     ENGINEER which graphically shows the scope, extent, and character of the
     Work to be performed by Contractor. Shop Drawings are not Drawings as so
     defined.

9.   Effective Date of the Agreement - The date indicated in this Agreement upon
     which it becomes effective, but if no such date is indicated, it means the
     date on which the Agreement is signed and delivered by the last of the two
     parties to sign and deliver.

10.  ENGINEER's Consultants - Individuals or entities having a contract with
     ENGINEER to furnish services with respect to this Project as ENGINEER's
     independent professional associates, consultants, subcontractors, or
     vendors. The term ENGINEER includes ENGINEER's Consultants.

11.  Hazardous Environmental Condition - The presence at the Site of Asbestos,
     PCB's, Petroleum, Hazardous Waste, or Radioactive Materials in such
     quantities or circumstances that may present a substantial danger to
     persons or property exposed thereto in connection with the Work.

12.  Hazardous Waste - The term Hazardous Waste shall have the meaning provided
     in Section 1004 of the Solid Waste Disposal Act (42 USC Section 6903) as
     amended from time to time.

13.  Laws and Regulations; Laws or Regulations - Any and all applicable laws,
     rules, regulations, ordinances, codes, standards, and orders of any and all
     governmental bodies, agencies, authorities, and courts having jurisdiction.

14.  Site - Lands or areas indicated in the Contract Documents as being
     furnished by OWNER upon which the Work is to be performed, rights-of-way
     and easements for access thereto, and such other lands furnished by OWNER
     which are designated for use of Contractor.

<PAGE>

15.  Specifications - That part of the Contract Documents consisting of written
     technical descriptions of materials, equipment, systems, standards, and
     workmanship as applied to the Work and certain administrative details
     applicable thereto.

16.  Work - The entire completed construction or the various separately
     identifiable parts thereof required to be provided under the Contract
     Documents with respect to this Project. Work includes and is the result of
     performing or furnishing labor, services, and documentation necessary to
     produce such construction and furnishing, installing, and incorporating all
     materials and all equipment into such construction, all as required by the
     Contract Documents.

                                       END

<PAGE>

                                                                      APPENDIX 1

                              STANDARD HOURLY RATES
                                  FOR YEAR 2004

<TABLE>
<S>                         <C>
Principal/Project Manager   $90.00/hr.
Professional Engineer       $77.00/hr.
Design Engineer             $67.00/hr.
Engineering Technician      $50.00/hr.
CAD Technician              $42.00/hr.
Clerical                    $38.00/hr.
</TABLE>

                              REIMBURSABLE EXPENSES

<TABLE>
<S>                             <C>
CAD Workstation & Plotter       $ 3.00/hr
Printing                        Actual Cost
Commercial Services             Actual Cost
Vehicle - Rental                Actual Cost
Vehicle - Company               $0.36/mile
Rental Equipment                Actual Cost
Travel & Per Diem               Actual Cost
Laboratory Testing              Actual Cost + 10%
Sub Consultants                 Actual Cost + 10%
Cellular Telephone Calls        Actual Cost
Long Distance Telephone Calls   Actual Cost
</TABLE><PAGE>
                                                                    Exhibit 10.4
                                LETTER OF INTENT

DATE: October 29, 2004

PARTIES: FAGEN, INC., a Minnesota Corporation, of Granite Falls, MN ("Fagen")
         and SIOUXLAND ETHANOL, LLC of Jackson, Nebraska ("Owner")

Owner is an entity organized to facilitate the development and building of a
locally-owned 50 MGY gas-fired fuel ethanol plant in the vicinity of Jackson,
Nebraska (the "Facility" or "Project").

Fagen is an engineering and construction firm capable of providing development
assistance, as well as designing and constructing the Facility being considered
by Owner.

Owner and Fagen agree to use best efforts in jointly developing this Project
under the following terms:

          1. Owner agrees that Fagen will Design/Build the Facility if
     determined by Owner to be feasible and if adequate financing is obtained.
     Should Owner choose to develop or pursue a relationship with a company
     other than Fagen to provide the preliminary engineering or design-build
     services for the project, then Owner shall reimburse Fagen for all expenses
     Fagen has incurred in connection with the Project based upon Fagen's
     standard rate schedule plus all third party costs incurred from the date of
     this Letter of Intent. Such expenses include, but are not limited to, labor
     rates and reimbursable expenses such as legal charges for document review
     and preparation, travel expenses, reproduction costs, long distance phone
     cost, and postage. In the event Fagen's services are terminated by Owner,
     title to the technical data, which may include preliminary engineering
     drawings and layouts and proprietary process related information, shall
     remain with Fagen; however, Owner shall have the limited license to use the
     above described technical data, excluding proprietary process related
     information, for construction, operation, repair and maintenance of the
     Project.

          If Fagen intentionally or by gross negligence fails or refuses to
     comply with its commitments contained in this Letter of Intent, Fagen shall
     absorb all of its own expenses, and Owner shall have the right to terminate
     the Letter of Intent immediately upon written notice to Fagen, and Owner
     shall be released from its obligations to pay or reimburse Fagen as
     described above.

          2. Fagen will provide Owner with assistance in evaluating, from both a
     technical and business perspective:

               -    Owner organizational options;

               -    The appropriate location of the proposed Facility; and

               -    Business plan development.

                                  Page 1 of 3

<PAGE>

     Fagen assumes no risk or liability of representation or advice to Owner by
     assisting in evaluating the above. All decisions made regarding
     feasibility, financing, and business risks are the Owner's responsibility
     and liability.

          3. Fagen agrees to Design/Build the Facility, utilizing ICM, Inc.
     technology in the plant process, for a lump sum price as follows:

          a. $56,619,000.00 for the 50 MGY gas-fired Facility

     These lump sum prices shall remain firm by Fagen to Owner until December
     31, 2005, and may be subject to revision by Fagen after such date.

          4. Fagen will assist Owner in locating appropriate management for the
     Facility.

          5. Fagen will assist Owner in presenting information to potential
     investors, potential lenders, and various entities or agencies that may
     provide project development assistance.

          6. During the term of this Letter of Intent the Owner agrees that
     Fagen will be the exclusive Developer and Design-Builder for the Owner in
     connection with matters covered by this Letter of Intent, and Owner shall
     not disclose any information related to this Letter of Intent to a
     competitor or prospective competitor of Fagen.

          7. This Letter of Intent shall terminate on December 31, 2005 unless
     the basic size and design of the Facility have been determined and mutually
     agreed upon, and a specific site or sites have been determined and mutually
     agreed upon, and at least 10% of the necessary equity has been raised.
     Furthermore, this Letter of Intent shall terminate on December 31, 2006
     unless financing for the Facility has been secured. Either of the
     aforementioned dates may be extended upon mutual written agreement of the
     Parties.

          8. Fagen and Owner agree to negotiate in good faith and enter into a
     definitive lump sum design-build agreement, including Exhibits thereto,
     acceptable to the Parties, Upon execution of such agreement, this Letter of
     Intent becomes null and void.

          9. The Parties agree that this Letter of Intent may be modified only
     by written agreement by the Parties.

          10. This Letter of Intent may be executed in one or more counterparts,
     each of which when so executed and delivered shall be deemed an original,
     but all of which taken together constitute one and the same instrument.
     Signatures which have been affixed and transmitted by facsimile shall be
     binding to the same extent as an original signature, although the Parties
     contemplate that a fully executed counterpart with original signatures will
     be delivered to each Party.

                                  Page 2 of 3

<PAGE>

SIOUXLAND ETHANOL, LLC                  FAGEN, INC.

By: /s/ Tom Lynch                       By: /s/ O. Wayne Mitchell
    ---------------------------------       ------------------------------------
Its: President                          Its: Sr. V.P.

Date: 11-5-04                           Date: 11/4/04

                                  Page 3 of 3

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