Exhibit (a)

JOINT FILING AGREEMENT

     The undersigned hereby agree that Amendment No. 12 to the Statement on Schedule 13D relating to units of limited partnership interest in Springhill Lake Limited Partnership, filed by the undersigned, and all further amendments to such Statement on Schedule 13D, shall be filed on behalf of each of them. This Agreement is intended to satisfy Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.

Dated: March 12, 2007

APARTMENT INVESTMENT AND
MANAGEMENT COMPANY
By:	/s/ Martha Long
	Martha Long
	Senior Vice President
AIMCO-GP, INC.
By:	/s/ Martha Long
	Martha Long
	Senior Vice President
AIMCO PROPERTIES, L.P.
By:	AIMCO-GP, INC.
	(General Partner)
By:	/s/ Martha Long
	Martha Long
	Senior Vice President