SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 SCHEDULE 13D/A
                                (Amendment No. 1)

                    Under the Securities Exchange Act of 1934

                                BSB BANCORP, INC.
                             -----------------------
                                (NAME OF ISSUER)

                     Common Stock, par value $.01 per share
                -------------------------------------------------
                         (Title of Class of Securities)

                                   055652-10-1
                 -----------------------------------------------
                      (CUSIP Number of Class of Securities)

                              Mr. Daryl R. Forsythe
                      President and Chief Executive Officer
                                NBT Bancorp Inc.
                              52 South Broad Street
                             Norwich, New York 13815
                                 (607) 337-2265
    ------------------------------------------------------------------------
            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                                    Copy to:

                              Brian D. Alprin, Esq.
                             Laurence S. Lese, Esq.
                          Duane, Morris & Heckscher LLP
                         1667 K Street, N.W., Suite 700
                             Washington, D.C. 20006
                                 (202) 776-7800

                                 October 4, 2000
                     ---------------------------------------
                          (Date of Event which Requires
                            Filing of this Statement)

                                       1



If the filing person has previously  filed a Statement on Schedule 13G to report
the  acquisition  which  is the  subject  of  this  Statement  because  of  Rule
13d-1(b)(3) or (4), check the following:

                                       [ ]

Check the following box if a fee is being paid with this statement:
                                       [ ]
- --------------------------------------------------------------------------------
(1)      NAMES OF REPORTING PERSONS
         S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         NBT BANCORP INC.
         16-1268674
- --------------------------------------------------------------------------------
(2)      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:
                                   (a) [ ]
                                   (b) [ ]
- --------------------------------------------------------------------------------
(3)      SEC USE ONLY

- --------------------------------------------------------------------------------
(4)      SOURCE OF FUNDS*

         WC/00
- -------------------------------------------------------------------------------
(5)      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
         PURSUANT TO ITEMS 2(d) OR 2(e)

                                       [ ]
- -------------------------------------------------------------------------------
(6)      CITIZENSHIP OR PLACE OF ORGANIZATION

         DELAWARE
- -------------------------------------------------------------------------------
NUMBER OF SHARES            (7)   SOLE VOTING POWER
BENEFICIALLY OWNED BY                    -0-(1)
EACH REPORTING PERSON             ----------------------------------------------
WITH:                       (8)   SHARED VOTING
                                         -0-
                                  ----------------------------------------------
                            (9)   SOLE DISPOSITIVE
                                         -0-(1)
                                  ----------------------------------------------
                            (10)  SHARED DISPOSITIVE
                                         -0-

                                       2



- -------------------------------------------------------------------------------
(11)     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
         PERSON

         -0-(1)
- -------------------------------------------------------------------------------
(12)     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11 EXCLUDES CERTAIN
         SHARES*                                  [ ]

         N/A
- -------------------------------------------------------------------------------
(13)     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

         APPROXIMATELY -0-%(1)
- -------------------------------------------------------------------------------
(14)     TYPE OF REPORTING PERSON*

         CO
- -------------------------------------------------------------------------------

*        SEE INSTRUCTIONS BEFORE FILLING OUT!

(1)      The shares of Issuer  common  stock  covered by the initial  report had
         been purchasable by Reporting Person upon exercise of an option granted
         by issuer to Reporting  Person as of April 19, 2000,  and  described in
         Item 4 of this report.  On October 4, 2000, Issuer and Reporting Person
         agreed to terminate the option  subject to the initial  report and this
         report. See Item 4 below for a discussion of the Option.

ITEM 1.  SECURITY AND ISSUER.

This statement on Schedule 13D/A (the  "Schedule  13D/A")  relates to the common
stock, $.01 par value per share (the "Shares" or the "Issuer Common Stock"),  of
BSB Bancorp,  Inc., a Delaware corporation  ("Issuer").  The principal executive
office of issuer is  located  at 58-68  Exchange  Street,  Binghamton,  New York
13901.  The purpose of filing  this  Schedule  13D/A is to report the  agreement
between Issuer and Reporting  Person,  dated as of October 4, 2000, to terminate
that certain  Agreement and Plan of Merger between Issuer and Reporting  Person,
dated as of April 19,  2000 (the  "Plan of  Merger"),  including  the Option (as
discussed in Items 3 and 4 below).

                                       3




The information set forth in the Exhibit hereto is hereby expressly incorporated
herein by reference and the  responses to each item of this  Schedule  13D/A are
qualified in their entirety by the provisions of such Exhibit.

ITEM 2.  IDENTITY AND BACKGROUND.

(a)-(c) This Schedule 13D/A is filed by NBT Bancorp Inc., a Delaware Corporation
("Reporting Person").

The business address of Reporting Person is 52 South Broad Street,  Norwich, New
York  13815.  The  principal  business  of  Reporting  Person is a bank  holding
company.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

The Option  (defined in Item 4 below) to acquire shares was granted by Issuer to
Reporting Person as an inducement to Reporting  Person's  entering into the Plan
of  Merger,  providing  for the  merger of Issuer  into  Reporting  Person  with
Reporting Person being the surviving corporation (the "Merger"). Pursuant to the
Plan of Merger,  each outstanding Share would have been converted into the right
to receive two shares of common  stock,  par value $.01 per share,  of Reporting
Person ("Reporting Person Common Stock"). The Merger was subject to the approval
of  Issuer's  and  Reporting  Person's  stockholders,  respectively,  regulatory
approvals,  and the satisfaction or waiver of various other conditions,  as more
fully  described in the Plan of Merger.  None of the Purchase Events (defined in
Item 4 below)  permitting the exercise of the Option had occurred as of the date
hereof.

ITEM 4.  PURPOSE OF THE TRANSACTION.

The information set forth in Item 3 is hereby incorporated herein by reference.

The purpose of the  transaction  was for Issuer to merge with and into Reporting
Person, with reporting person being the surviving entity. In connection with the
Plan of Merger and in consideration thereof, Issuer and Reporting Person entered
into that certain Stock Option Agreement (the "Option Agreement"),  dated  April
19, 2000,  whereby Issuer granted to Reporting  Person an option (the "Option").
Under the  Option,  Reporting  Person  was given  the right to  purchase,  under
certain  circumstances  described  therein,  up to 19.9% of the total  number of
outstanding  shares of Issuer  Common Stock as of the first date that the Option
would become exercisable.  The Option, being exercisable for approximately 19.9%
of the outstanding  Shares,  would represent  approximately  16.6% of the Shares
that would be outstanding after giving effect to the exercise of the Option.

On October 4, 2000,  the Boards of  Directors of NBT and BSB agreed to terminate
the Plan of Merger and the Option.

                                       4



ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER.

(c) To the best of  Reporting  Person's  knowledge  as of the date  hereof,  (i)
neither Reporting Person nor any subsidiary or affiliate of Reporting Person nor
any of Reporting Person's executive officers or directors  beneficially owns any
shares of Issuer Common Stock, and (ii) except for the Option discussed in Items
3 and 4 above,  there have been no  transactions  in the shares of Issuer Common
Stock effected during the past 60 days by Reporting  Person,  nor to the best of
Reporting Person's knowledge, by any subsidiary or affiliate of Reporting Person
or any of Reporting Person's executive officers or directors.

ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
SECURITIES OF THE ISSUER.

The disclosure set forth in Items 3 and 4 above regarding the Plan of Merger and
Option Agreement and the Termination  Agreement is hereby incorporated herein by
reference.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS.

EXHIBIT  DESCRIPTION

2.1      Termination  Agreement, dated as of October 4, 2000, by and between NBT
         Bancorp Inc. and BSB Bancorp, Inc.*

*  Incorporated  by  reference  to  the  corresponding  exhibit  number  in  the
Registrant's  Current  Report on SEC Form 8-K filed by the Registrant on October
5, 2000, SEC File No. 0-14703.

                                       5




                                    SIGNATURE

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that this statement is true, complete and correct.

                                          NBT BANCORP INC.

                                          By: /s/ Daryl R. Forsythe
                                          Name:   Daryl R. Forsythe
                                          Title:  President and Chief
                                          Executive Officer

Dated: October 5, 2000



                                       6