D.C. Mun. Regs. tit. 11, r. 11-W117
The Southeast Federal Center zones (SEFC-1 though SEFC-4) are applied to an approximately forty-two acre (42 ac.) portion of the Southeast Federal Center site that is designated for "federal use" and "parks, recreation, and open space" in the Comprehensive Plan for the National Capital. The following squares and portions of squares in the southeast quadrant of the District of Columbia are included in the SEFC area: Squares 743, 744, 771, 802, 826, 853, portions of Squares 770 and 801, and a portion of land south of 771 and 802 bounded by the District of Columbia Water and Sewer Authority ("DC Water") facility to the west, the Washington Navy Yard to the east, and the Anacostia River to the south. The site is bounded generally by M Street, S.E. to the north; the Anacostia River to the south; 1st Street, S.E. and DC Water to the west; and the Washington Navy Yard to the east.
D.C. Mun. Regs. tit. 11, r. 11-W117