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<td colspan="2"><h5 id="nrcs"><img src="media/image1.png"
style="width:0.58819in;height:0.34444in" />NRCS</h5>
<p><sup>Natural Resources Conservation Service</sup></p></td>
<td colspan="8"><h2 id="stream-crossing">STREAM CROSSING</h2>
<h1 id="conservation-practice-job-sheet-578">Conservation Practice Job
Sheet – 578</h1>
<p><strong><u>Installation</u></strong></p></td>
</tr>
<tr class="even">
<td colspan="10"><h2 id="new-mexico-november-2008">New Mexico November,
2008</h2></td>
</tr>
<tr class="odd">
<td>Client/Operating Unit:</td>
<td colspan="2">     </td>
<td>Tract:</td>
<td>     </td>
<td colspan="2">Farm No.:</td>
<td>     </td>
<td>Date:</td>
<td>     </td>
</tr>
<tr class="even">
<td>Farm/Ranch Location:</td>
<td colspan="2">     </td>
<td>County:</td>
<td>     </td>
<td colspan="2">Acre(s):</td>
<td>     </td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td>Program:</td>
<td colspan="2">     </td>
<td>Contract No.:</td>
<td colspan="2">     </td>
<td colspan="3">Field No.:</td>
<td>     </td>
</tr>
<tr class="even">
<td>Drawing No.:</td>
<td colspan="2">     </td>
<td>Item :</td>
<td colspan="2">     </td>
<td colspan="3">Planned Installation Date:</td>
<td>     </td>
</tr>
</tbody>
</table>

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  Definition:

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A stabilized area or structure constructed across a stream to provide a
travel way for people, livestock, equipment or vehicles.

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  Purpose:

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To provide a stable crossing for access to another land unit while
reducing streambank and streambed erosion.

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  **Construction Items:**

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A properly placed stream crossing protects the stream and riparian zone.
Estimated life spam of this installation is 10 years.

-   Locate the stream crossing in acres where the streambanks and
    streambed are stable. Avoid wetland areas. Crossings should not be
    placed in bends of the stream, but only at the crossover point on
    straight stretches.

-   Crossings shall not exceed 6 feet in width for animal crossings. A
    multi use crossing should not exceed 10 feet in width.

-   Side slope cuts to access the crossing shall be not steeper than 2
    horizontal to 1 vertical in earthen materials. In rock cuts or
    fills, the slopes should be not steeper than 1.5 horizontal to 1
    vertical.

-   Approaches to stream crossings shall not be steeper than 4
    horizontal to 1 vertical. The approaches must be stable, have a
    gradual ascent or decent grade and be underlain with suitable
    material. The minimum width of the approach shall be equal to the
    width of the crossing surface. Surface runoff must be diverted
    around the approaches to prevent erosion.

-   All rock placed must be able to withstand exposure to air, water,
    freezing and thawing. The rock must be sized to withstand
    mobilization during design flood events.

-   Fencing must be placed to eliminate access to areas of the stream
    other than at the designed crossing.

-   Crossings may be rock fords, concrete fords or culvert and bridge
    crossings. Geofabric may be place under rock fords if desired.

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  **Requirements:**

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-   CONSTRUCTION SHALL NOT COMMENCE PRIOR TO THE ISSURANCE OF A DESIGN
    ACCEPTANCE LETTER ISSUED BY THE NRCS. (See NM521.01 of the National
    Engineering Manual).

-   It shall be the responsibility of the owner/lessee to obtain all
    necessary permits and/or rights, and to comply with all ordinances
    and laws, pertaining to this installation.

-   On Federal, State, or Tribal lands, or when federal funding is
    involved on private land, the landowner/lessee must have
    archaeological clearance and approval/permit from the responsible
    permitting agency prior to any construction. If during installation,
    any cultural resources, historical resources, threatened or
    endangered species are the responsible permitting agency prior to
    continuing construction.

-   Installation shall be in accordance with the drawings,
    specifications, and special requirements.

-   The following additional data is required: Dimensions and elevations
    of components as built, materials used, data to determine materials,
    and meet the specifications.

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  **Practice Classification and Approval (NEM Section 501):**

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The highest Job Class identified for all applicable practices shall be
used to identify the Job Class of the project.

  -------------------------- ---------------------- ----------------------
                                                    **Job Class**

  **Stream Flow (25 year     **Cubic Feet per            
  frequency)**               Second**               

  **Flow Diverted**          **Cubic Feet per            
                             Second**               

  **Height of Drop**         **Feet**                    
  -------------------------- ---------------------- ----------------------

**Requirements:**

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  Engineer Certification:

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The designer shall certify that the design has been prepared in
accordance with Practice Standard 578, the Statement of Work for
Practice Standard 578, and any other applicable practice standards
necessary to complete the design.

For designs prepared by NRCS personnel or non-NRCS personnel with
assigned NRCS job approval authority:

Designed by: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Designer's Engineering
Job Approval Limit: \_\_\_\_\_\_\_ Date: \_\_\_\_\_\_\_\_\_

(signature) (for this practice)

For designs prepared by non-NRCS personnel with not NRCS job approval
authority assigned:

Designed by: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ New Mexico PE License
No.: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date: \_\_\_\_\_\_\_\_\_

(signature)

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  Landowner/Operator Acknowledgement and Acceptance:

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The landowner/operator acknowledges that:

-   They have received a copy of the construction drawings and
    specifications, and understands the contents and requirements and,

-   Maintenance of the installed work is necessary for proper
    performance for the life of the practice. All federal cost shared
    practices must be maintained to these specifications for the
    expected life of the practice.

Accepted by:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
Date: \_\_\_\_\_\_\_\_\_\_\_\_\_

Landowner/Operator

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  Practice Completion:

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I have made an on-site inspection (or I am accepting owner/contractor
documentation located in the case file), and have determined that the
job, as installed, conforms to the drawings and specifications and that

\_\_\_\_\_\_ irrigation system(s) of LEPA covering \_\_\_\_\_ acres was
installed in accordance with Conservation Practice 578.

Accepted by:
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Job
Title: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Date:
\_\_\_\_\_\_\_\_\_\_