RIVERSIDE PARK EXTENSION. 
65 
Summary of records of borings made in Neiv York and vicinity— Continued. 
2. BORINGS IN THE BOROUGH OF MANHATTAN— Continued. 
Location. 
Riverside Park extension — Continued. 
Twelfth avenue — Continued. 
20 feet north of 868 
5 feet north of 869 
25 feet north of 870 
5 feet north of 871 
25 feet north of 872 
3 feet north of 873 
20 feet north of 874 
20 feet north of 875 
25 feet north of 876 
25 feet north of 877 
Southeast corner 158th street 
100 feet east of 879 
25 feet south of 880 
25 feet south of 881 
25 feet south of 882 
25 feet south of 883 
25 feet south of 884 
25 feet south of 885 
175 feet south of 880 
25 feet south of 887 
25 feet south of 888 
25 feet south of 889 
25 feet south of 890 
25 feet south of 891 
15 feet west of 892 
25 feet south of 893 
25 feet south of 894 
200 feet south of 887 
5 feet south of 896 
20 feet south of 897 
25 feet south of 898 
20 feet south of 899 
25 feet south of 900 
5 feet south of 901 
Bull. 270—05 5 
Depth of boring to rock. 
As given. 
Referred 
to Q. S. 
datum, 
Sandy 
Hook. 
- 5.33 
3 
- 5 
3 
- 2 
6 
— 3. 50 
4 
- 1.50 
6 
- 2.66 
5 
- 3.50 
4 
- 5 
3 
- 4.50 
3 
- 4.16 
4 
- 6.33 
2 
- 3.75 
4 
- 4.16 
4 
- 5.16 
3 
- 6 
2 
- 5.50 
2 
- 4.33 
4 
- 5 
3 
- 3.50 
4 
- 2.66 
5 
- 3.50 
4 
- 5.50 
2 
- 9.66 
— 
2 
- 6.16 
2 
-11 
— 
3 
-11.66 
— 
4 
-12. 50 
5 
- 7.16 
1 
-15. 75 
— 
8 
—12. 33 
— 
4 
— 6.16 
2 
-10. 50 
3 
- 7 
1 
- 5 
3 
Kind of rock, if known. 
Rock or bowlder. 
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