EAST RIVEK SECTIONS. 
33 
Summary of records of borings made in New York and vicinity — Continued. 
1. BORINGS BENEATH CHANNELS ON WATER FRONT— Continued. 
Loca tiuii. 
Depth of boring to rock. 
As given. 
Referred 
to U. S. 
datum. 
Sandy 
Hook. 
Kind of rock, if known. 
east river sections — continued 
East River bridge No. 2— Continued. 
New York tower — 
North pier (F) 
(H) 
(A) 
(C) 
Southpier,northeastcorner(D) . 
East end (K) 
(B) 
Pierhead line 175 feet south of 
K (C). 
East River bridge No. 3. a 
Manhattan tower — 
850 feet north of (anchorage) . . 
300 feet south of bulkhead 
line (a). 
(>>) 
(c) 
{*) 
(e) 
(/) 
(9) 
(h) 
(') 
Brooklyn tower — 
200 feet north of bulkhead line. 
850 feet south of (anchorage) . . 
East River bridge No. h. a 
60th street pier — 
80 feet east of east line of avenue 
A. 
40 feet from east end of pier . . . 
54. 5 
54. 5 
45 
56 
71 
56. 9 
(id 
78. 5 
-119 
-133 
-108 
1 26 
-126 
-133 
-123 
-115 
-113 
■f 8.92 
50 
69 
56 
71 
— 76 
-118 
-131 
-106 
-124 
-124 
-131 
121 
-113 
— Ill 
— 92 
- 70 
< rlieiss. 
Do. 
Do. 
Do. 
Gneiss. 
Do. 
Do. 
Do. 
Do. 
Do. 
Marble. 
Gneiss. 
Do. 
Do. 
Do. 
Do. 
Gneiss. 
Do. 
- 76.05 
a New York department of bridges. Diamond-drill borings (averages) ; datum, mean high water. 
Bull. 270—05 3 
