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Park Commissioners, City of Brooklyn, 



Engineer's Office, January 1st, 1867. 



Jos. P. Davis, Esq., 



Engineer in charge : 



Sir : The following is a statement of the progress and amount of 

 work done upon the park, from the beginning of operations, in June, 

 1866, up to January 1, 1867 : 



THE TOPOGRAPHICAL SURVEY. 



A careful topographical survey of the park grounds being com- 

 menced, several base lines were measured at suitable intervals, and 

 from these a rectangular system has been established, extending over 

 the whole area. With this as a base, levels have been taken, and 

 from the data thus obtained, topographical maps constructed, exhib- 

 iting accurately the variations of surface by means of contour lines, 

 drawn at intervals, to show each foot of elevation. This work is 

 complete for a large portion of the park. The area, the topography 

 of which has been finished, is shown upon the accompanying map, 

 where contour lines are drawn, representing variations of ten feet in 

 elevation. 



The rectangular division of the surface of the park is also used 

 as the basis for the survey and location of the drives, bridle roads, 

 walks, and drainage systems, and is of great assistance to the engineers 

 in giving working grades for shaping ground, and in making up esti- 

 mates of work proposed or finished. 



GRADING OF DRIVES, BRIDLE ROADS, WALKS, AND 

 MEADOWS. 



The construction force has been mainly engaged in making the 

 necessary excavation and filling for grading the Plaza exterior to 

 the main entrance, at junction of Flatbush and Ninth avenues, the 

 drives, bridle roads, and walks running from the entrance into the 

 park and the meadow surfaces at the northern portion of the 

 grounds. 



The whole area, which has been worked over, is about sixty-one 

 acres. Of this, about twenty-eight acres have been brought to sub- 

 grade, requiring only the addition of soil to bring that portion to 

 the proposed final surface. The location and extent of the area 

 worked over, are shown upon the progress map by line shading. 



