sec document



                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                                 --------------

                                  SCHEDULE 13D
                                 (RULE 13d-101)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
            TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                  RULE 13d-2(a)

                             (Amendment No. 13)(1)

                            Layne Christensen Company
                            -------------------------
                                (Name of Issuer)

                          Common Stock, $.01 Par Value
                          ----------------------------
                         (Title of Class of Securities)

                                    521050104
                                    ---------
                                 (CUSIP Number)

                              STEVEN WOLOSKY, ESQ.
                 OLSHAN GRUNDMAN FROME ROSENZWEIG & WOLOSKY LLP
                                Park Avenue Tower
                               65 East 55th Street
                            New York, New York 10022
                                 (212) 451-2300
                                 --------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                December 19, 2006
                                -----------------
             (Date of Event Which Requires Filing of This Statement)

         If the filing person has  previously  filed a statement on Schedule 13G
to report the  acquisition  that is the  subject of this  Schedule  13D,  and is
filing this schedule because of Rule 13d-1(e),  13d-1(f) or 13d-1(g),  check the
following box | |.

         NOTE.  Schedules  filed in paper format shall include a signed original
and five copies of the  schedule,  including  all  exhibits.  SEE Rule 13d-7 for
other parties to whom copies are to be sent.

                         (Continued on following pages)

                               (Page 1 of 8 Pages)

--------
(1)      The  remainder  of this cover page shall be filled out for a  reporting
person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

         The information  required on the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 or otherwise  subject to the  liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  SEE the
NOTES).




----------------------                                    ----------------------
CUSIP No. 521050104                   13D                    Page 2 of 8 Pages
----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    STEEL PARTNERS II, L.P.
--------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
--------------------------------------------------------------------------------
     3         SEC USE ONLY

--------------------------------------------------------------------------------
     4         SOURCE OF FUNDS*

                    WC
--------------------------------------------------------------------------------
     5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
               PURSUANT TO ITEM 2(d) OR 2(e)                                 / /
--------------------------------------------------------------------------------
     6         CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE
--------------------------------------------------------------------------------
 NUMBER OF         7     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  1,018,536
  OWNED BY     -----------------------------------------------------------------
    EACH           8     SHARED VOTING POWER
 REPORTING
PERSON WITH                   - 0 -
               -----------------------------------------------------------------
                   9     SOLE DISPOSITIVE POWER

                              1,018,536
               -----------------------------------------------------------------
                  10     SHARED DISPOSITIVE POWER

                              - 0 -
--------------------------------------------------------------------------------
    11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    1,018,536
--------------------------------------------------------------------------------
    12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
               CERTAIN SHARES*                                               / /
--------------------------------------------------------------------------------
    13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    6.6%
--------------------------------------------------------------------------------
    14         TYPE OF REPORTING PERSON*

                    PN
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!




----------------------                                    ----------------------
CUSIP No. 521050104                   13D                    Page 3 of 8 Pages
----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    STEEL PARTNERS, L.L.C.
--------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
--------------------------------------------------------------------------------
     3         SEC USE ONLY

--------------------------------------------------------------------------------
     4         SOURCE OF FUNDS*

                    OO
--------------------------------------------------------------------------------
     5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
               PURSUANT TO ITEM 2(d) OR 2(e)                                 / /
--------------------------------------------------------------------------------
     6         CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE
--------------------------------------------------------------------------------
 NUMBER OF         7     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  1,018,536
  OWNED BY     -----------------------------------------------------------------
    EACH           8     SHARED VOTING POWER
 REPORTING
PERSON WITH                   - 0 -
               -----------------------------------------------------------------
                   9     SOLE DISPOSITIVE POWER

                              1,018,536
               -----------------------------------------------------------------
                  10     SHARED DISPOSITIVE POWER

                              - 0 -
--------------------------------------------------------------------------------
    11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    1,018,536
--------------------------------------------------------------------------------
    12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
               CERTAIN SHARES*                                               / /
--------------------------------------------------------------------------------
    13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    6.6%
--------------------------------------------------------------------------------
    14         TYPE OF REPORTING PERSON*

                    OO
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!




----------------------                                    ----------------------
CUSIP No. 521050104                   13D                    Page 4 of 8 Pages
----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    WARREN G. LICHTENSTEIN
--------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
--------------------------------------------------------------------------------
     3         SEC USE ONLY

--------------------------------------------------------------------------------
     4         SOURCE OF FUNDS*

                    OO, PF
--------------------------------------------------------------------------------
     5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
               PURSUANT TO ITEM 2(d) OR 2(e)                                 / /
--------------------------------------------------------------------------------
     6         CITIZENSHIP OR PLACE OF ORGANIZATION

                    USA
--------------------------------------------------------------------------------
 NUMBER OF         7     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  1,027,536(1)
  OWNED BY     -----------------------------------------------------------------
    EACH           8     SHARED VOTING POWER
 REPORTING
PERSON WITH                   - 0 -
               -----------------------------------------------------------------
                   9     SOLE DISPOSITIVE POWER

                              1,027,536(1)
               -----------------------------------------------------------------
                  10     SHARED DISPOSITIVE POWER

                              - 0 -
--------------------------------------------------------------------------------
    11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    1,027,536(1)
--------------------------------------------------------------------------------
    12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
               CERTAIN SHARES*                                               / /
--------------------------------------------------------------------------------
    13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    6.7%
--------------------------------------------------------------------------------
    14         TYPE OF REPORTING PERSON*

                    IN
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

         (1) Consists  of 9,000  shares of Common  Stock  owned  directly by Mr.
             Lichtenstein and 1,018,536 shares of Common Stock owned directly by
             Steel Partners II, L.P.




----------------------                                    ----------------------
CUSIP No. 521050104                   13D                    Page 5 of 8 Pages
----------------------                                    ----------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                    JOHN J. QUICKE
--------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) / /
                                                                         (b) / /
--------------------------------------------------------------------------------
     3         SEC USE ONLY

--------------------------------------------------------------------------------
     4         SOURCE OF FUNDS*


--------------------------------------------------------------------------------
     5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
               PURSUANT TO ITEM 2(d) OR 2(e)                                 / /
--------------------------------------------------------------------------------
     6         CITIZENSHIP OR PLACE OF ORGANIZATION

                    USA
--------------------------------------------------------------------------------
 NUMBER OF         7     SOLE VOTING POWER
   SHARES
BENEFICIALLY                  3,000
  OWNED BY     -----------------------------------------------------------------
    EACH           8     SHARED VOTING POWER
 REPORTING
PERSON WITH                   - 0 -
               -----------------------------------------------------------------
                   9     SOLE DISPOSITIVE POWER

                              3,000
               -----------------------------------------------------------------
                  10     SHARED DISPOSITIVE POWER

                              - 0 -
--------------------------------------------------------------------------------
    11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                    3,000
--------------------------------------------------------------------------------
    12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
               CERTAIN SHARES*                                               / /
--------------------------------------------------------------------------------
    13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    LESS THAN 1%
--------------------------------------------------------------------------------
    14         TYPE OF REPORTING PERSON*

                    IN
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!




----------------------                                    ----------------------
CUSIP No. 521050104                   13D                    Page 6 of 8 Pages
----------------------                                    ----------------------


         The following  constitutes Amendment No. 13 ("Amendment No. 13") to the
Schedule 13D filed by the undersigned. This Amendment No. 13 amends the Schedule
13D as specifically set forth.

         Item 3 is hereby amended and restated to read as follows:

         Item 3.  Source and Amount of Funds or Other Consideration.

         The aggregate  purchase  price of the  1,018,536  Shares owned by Steel
Partners II is $9,989,498,  including brokerage commissions. The Shares owned by
Steel Partners II were acquired with partnership  funds. The aggregate  purchase
price of the 9,000 Shares owned directly by Mr.  Lichtenstein  is $176,660.  The
Shares owned directly by Mr.  Lichtenstein were acquired with his personal funds
upon the exercise of options previously awarded to him when he was a director of
the Issuer.

         Mr. Quicke  beneficially owns 3,000 Shares underlying options that were
awarded to him in his capacity as a director of the Issuer.

         Item 5(a) is hereby amended and restated to read as follows:

         (a) The aggregate  percentage of Shares  reported  owned by each person
named herein is based upon  15,390,242  Shares  outstanding,  which is the total
number of Shares  outstanding  as reported in the Issuer's  Quarterly  Report on
Form 10-Q for the quarter ended  October 31, 2006, as filed with the  Securities
and Exchange Commission on December 8, 2006.

         As of the close of business on December  19,  2006,  Steel  Partners II
beneficially  owned 1,018,536  Shares,  constituting  approximately  6.6% of the
Shares  outstanding.  As the general  partner of Steel Partners II, Partners LLC
may be deemed to beneficially  own the 1,018,536  Shares owned by Steel Partners
II, constituting approximately 6.6% of the Shares outstanding.  Mr. Lichtenstein
beneficially owned 1,027,536 Shares (consisting of (i) 1,018,536 Shares owned by
Steel  Partners  II that Mr.  Lichtenstein,  as the sole  executive  officer and
managing  member of Partners LLC, which in turn is the general  partner of Steel
Partners II, may be deemed to  beneficially  own, and (ii) 9,000 Shares directly
owned  by Mr.  Lichtenstein),  constituting  approximately  6.7%  of the  Shares
outstanding. Mr. Lichtenstein has sole voting and dispositive power with respect
to the 1,018,536 Shares owned by Steel Partners II by virtue of his authority to
vote and dispose of such Shares.

         Mr. Quicke  beneficially owns 3,000 Shares underlying  options that are
exercisable within 60 days of the date hereof.

         Item 5(c) is hereby amended to add the following:

         Schedule A annexed hereto lists all transactions in the Issuer's Common
Stock by the  Reporting  Persons  since the  filing of  Amendment  No. 12 to the
Schedule 13D. All of such transactions were effected in the open market.




----------------------                                    ----------------------
CUSIP No. 521050104                   13D                    Page 7 of 8 Pages
----------------------                                    ----------------------


                                   SIGNATURES

         After  reasonable  inquiry and to the best of his knowledge and belief,
each of the  undersigned  certifies  that  the  information  set  forth  in this
statement is true, complete and correct.

Dated: December 20, 2006           STEEL PARTNERS II, L.P.

                                   By: Steel Partners, L.L.C.,
                                       General Partner

                                   By: /s/ Lauren Isenman
                                       -----------------------------------------
                                       Lauren Isenman
                                       As Attorney In Fact for Warren G. Lichtenstein,
                                       Managing Member


                                   STEEL PARTNERS, L.L.C.

                                   By: /s/ Lauren Isenman
                                       -----------------------------------------
                                       Lauren Isenman
                                       as Attorney In Fact for Warren G. Lichtenstein,
                                       Managing Member


                                   /s/ Lauren Isenman
                                   ---------------------------------------------
                                   LAUREN ISENMAN
                                   as Attorney In Fact for Warren G. Lichtenstein,
                                   Individually


                                   /s/ John J. Quicke
                                   ---------------------------------------------
                                   JOHN J. QUICKE




----------------------                                    ----------------------
CUSIP No. 521050104                   13D                    Page 8 of 8 Pages
----------------------                                    ----------------------


                                   SCHEDULE A

                 Transactions in the Shares Since the Filing of
                 ----------------------------------------------
                      Amendment No. 12 to the Schedule 13D
                      ------------------------------------

Shares of Common Stock              Price Per                        Date of
   Purchased/(Sold)                 Share ($)                     Purchase/Sale
   ----------------                 ---------                     -------------

                             STEEL PARTNERS II, L.P.
                             -----------------------
       (29,603)                      33.4651                         12/12/06
       (18,000)                      33.4000                         12/13/06
       (10,615)                      33.3335                         12/14/06
       (24,528)                      33.3407                         12/15/06
       (50,000)                      33.3619                         12/18/06
       (50,000)                      33.3394                         12/19/06

                             STEEL PARTNERS, L.L.C.
                             ----------------------
                                      None

                             WARREN G. LICHTENSTEIN
                             ----------------------
                                      None

                                 JOHN J. QUICKE
                                 --------------
                                      None