subsurface data of boston terminal company property
TRANSCRIPT
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BOSTONPUBLICLIBRARY
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ffr. , /- 704
Ubrary
SOBSUEFACE DATA
OF
EOSTOH TEEICmAL
CC»IPAI3Y PROPEBTY
BOSTON, MASSACHUSETTS
BOSTON REDEVELOPMENT AUTHORITY
ENGINEERING DIVISION
BOSTON,MASSACHUSETTS
AUGUST 1963
BOSTONPUBLICLIBRARY
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idi.1
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Foreward
This Subsurface Data Report is for the Soston Terminal Corporation
Property known as the South Station Area, hounded hy Atlantic Avenue, Summer
Street, and Dorchester Avenue.
The purpose of this report is to gather and obtain all available
subsoil data and boring information within the area for use by the Boston
Redevelopment Authority in planning for the future redevelopment of the area.
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Existing Borings
Available information and data regarding suTssurface explorations
previously made v/ithin and along the boundaries have been afsseiabled and are
presented in descriptive and graphic form hereafter. The soil descriptions
used are not entirely consistent since the "borings are from many sources and
seme of the "borings were taken over kO years ago. However, it is "believed
that the terminology used is not misleading as it is in reasona"ble agreement
with that used "by Boring Contractors in the Boston Area. Tlie ground water
elevations and "blow counts of the sampling spoons are not shown on the
descriptive form logs "because this information was not available.
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Subsurface Conditions
The existing top of ground elevation in this area varies from approximately
+15 to +25 (Boston City Base).
The soil borings generally indicate a condition which is quite typical
for many sections of the Boston Area. The entire area has a varying depth of
fill cover. This fill is underlain "by a layer of organic sanely silt. Below
this silt is hard to soft clay and below the clay, a layer of granular material
which could be classified as a glacial till. The borings which were taken to
bedrock indicate that the bedrock below the glacial till is a soft shale.
The fill cover over this area varies from 8 feet to 20 feet in depth.
.It is a mixture of sand, gravel, silt, cinders, bricks, and wood. Excavations
in this fill at some locations in this area have revealed the presence of old
piers, wharfs, and piling.
The depth of the sandy silt varies frcm approximately 10 feet to 30 feet.
At some locations the borings indicate shells and soft peat in this sandy silt
fonaation.
The clay layer varies from 30 feet to 100 feet in depth. The top few
feet of this formation is a medium to hard yellow clay. The remainder is blue
clay generally growing softer \r±th increasing depth.
The anticipated construction problems to be encountered in this area are
excessive settlements of any proposed buildings. Although -uhe fill cover is
quite deep in some locations and the fill material is granular, major structures
are not generally built in fills of unknown origin underlain by two strata of
highly compressible soil (silt and clay). The reasons for this are: the behavior
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of this fill under building loads is practically impossible to predict with any
degree of accuracy, and the highly compressible silt and clay formations would
consolidate tinder building loads even after the predicated settlement was complete.
Both the silt and clay strata are so widespread throughout the Boston Area
and their soil properties so well knoira, that it is justifiable to predict that
deep foimdations will be required in this area in order to avoid excessive
settlements. The foundations could be either piles or caissons driven to or
just above bedrock approximately 100 feet down from the ground surface. Another
possibility, after extensive investigation, could be the use of so called
"floating foundations" where a weight of earth equal to the area load of the
building is excavated, thereby eliminating additional loading on the compressible
strata.
The South Postal Annex building on Dorchester Avenue in this area was
built on concrete caissons down to approximately bedrock. The addition to the
above mentioned building is being designed to rest on piles driven to bedrock.
Therefore, it can be concluded that in much of the subject area extensive
foundation work will have to be provided for proposed major structures.
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The following soil torings (nuinbered 1 to 33) vere taken from
a publication of the Boston Society of Civil Engineers.
The location of the "borings is shown on the acconrpanying plan.
The elevations shown on the boring logs refer to Boston City Base,
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Frcsn
- 7-10-12
-15-18-20
From
- 9-li-12
From
+ 5-10-20
-27-33
From
+16+ 9- 8-11-19
BORING NO. 1
Elevations
To
-10-12-15-18-20
'k2
BORIKG KO. 2
Elevations
Oto
-11-12
-39
BORING NO. 3
Elevations
Tc
-10-20
-27
-33-39
BORING NO. k
Elevations
To
+ 9- 8-11-19
-39
Description of Ifcterial
Soft black siltFi'^o clay- sandHard blue clay, sand
Hard yellow clay
Clay, sandHard yellow clay
Description of i'laterial
SiltSandHard blue clay
Description of l>Iaterial
MudHard blue clay
Soft sand and clay
Soft gravelHard clay and gravel
Description of Material
FillMudSoiTC clayHard blue clay
Mud, gravel, soft clay
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From
+20+ 2- If
- 8-13-20
-38-57
From
+20- 1
- h
-56
Fran
+20+12+ k- 1-11-27-3^
BORING KO. 5
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From
+ 6-51
Froai
+19+ 9+ k+- 7-11
Prom
+17+ 9
+
-17
BORING NO. 8
Elevations
To
-51-58
BCRH^'G NO. 9
Elevations
To
Oto
+ 9+ 6
+
-17-29
Description of I>Iaterial
Blue clayClay, sand, stones
Description of Liaterial
+ 9
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From
+18
+ 7+ k- 1- 5»"'
"
-28
From
+18+
-16-18
.2k
From
+17+11+-12
-29
From
+17+-16-18.2k
BORIMG NO. 11
Elevations
To
+ 7+ k- 1- 5
-IT-28
-35
BORING KO. 12
Flevations
To
+-16-18-24
-53
BOREIG NO. 13
Elevations
To
+11+-12-29
BORING KO. Ik
Elevations
To
+-16-18-24
-53
Description of Ifeterial
FillFine sand, mud
Hard yellow clay, little sand
little clay, sand coarse gravel
Hard "blue clay and sand
Hard hlne clay
Hard clay, sand and gravel
Description of Material
FillSilt, little sand
PeatStiff "blue clay
Medium stiff "blue clay
Description of l-Iaterial
FillSand; gravel, silt
Silt, shells
Silty sand
Hard blue clay
Description of Material
Sand fill, miscellaneous
Silt, very little sand
PeatStiff "blue clay
Medium stiff blue clay
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+19+ h- 2- 9-14-20-42
Frc«n
+16.6
-4.0-5.4-15.5-24.0-34.0-98.8
From
+18- 2
-U-25-34-108
BOBIHG JJO.
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From
+n.k-1.3-9.0-21.0-27.9-107.3
From
+20+- 6-16
-23-38-115
From
+19.5- 1- 12- 26- 36
From
+19.6+-7.0-19.8-25.0-108.5
BOEIUG HO. 18
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From
+19-5+k.O+
' 5-18-28-102
From
+20+ h- 2- 8-14-20-1+1
Frcsn
+21- 6-20-30-119
BORING NO. 22
Elevations
To
+k.O+- 5-18-28-102
-103
BOSE^IG NO. 23
Elevations
To
+ K- 2- 8-14-20
-kl-62
BQRIKG NO. 24
Elevations
To
- 6-20
-30-119-124
Description of Lfeterial
Sand and gravel fill
Soft black silt
Fine silty sand, shells.
Fine blue sand
Stiff blue clay, little sand
Soft blue clayClay, gravel, sand; struck
rock
Description of Material
FillSand, gravel, very little clay
Silty sand, shells
Hard silty sandFirm sand and clay, very fine
Stiff blue clay
Ifedium stiff blue clay
Description of Material
FillSilty sand, shells
Hard blue clay
Soft blue clayClay, sand, gravel; hard
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From
+15+13- 2-15
-31
-52
From
+17- 1-15
-30
-51
Frcm
-8.7-12.5-28.3
From
- 7-15-29-117
BORIKG NO.
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From
+15-10-22
-51
From
- 8-18-20-28
BORIKG m. 32
Elevations
To
-10-22
-51-61
BORBJG KO. 33
Elevations
To
-18-20-28-61
Inscription of Jfciterial
FillMudSoft clayHard clay
Description of Ifeterial
Soft black siltFine silty sandHard blue clayHard yellow clay
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The follovring soil 'borings were received froai the I-iassachusetts
Turnpike Authority and vere taken in the ^ring of I962.
The location of the borings is shoT^ra. on the accouipanying plan.
The elevations shown on the horing logs refer to Boston City Ease,
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The follOTrLng soil "borings were received from Pedersen and Tilney
Architects, and were talcen in I960.
The location of the iDorings is sho^m on the acconrpanying plan.
The elevations shown on the horing logs refer to Boston City Ease.
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EORIMG REPOST Co
;OL.DBERG &
SOSTOM -AST FP.CVIDENCE
Le Messuri.er & Associates 3psT9.Nj..M^.§.sACHU3ETTg
BOrjrv!G R2P0IIT
TO
SITE LOCATION SouXH.PosTA!^. Annex.A^^^ ;BC3T0Na..MA3SAcj:tuSE-xs .
SCALE 1"= S. FT.
BORING NO ??..
REFERENCE DATUM.. INFORMATION ON DRAWiNGS,
BOKING NO., .ZZ.A. CORING NO.. BORING NO..24
rO
0.0'
2.5'
Eurv. 24.0' = Slev. 24,0'±
V*v-.' FILL
0.0'
WATER5Lrr3."F- !4.0'
FINE TO MEDIUMSAND,
1_ITT!_E Sll-T.
SO.VIE
FINE TO MEDIUMGRAVEL. AND
L.ITTI.E C1_AY
FIUI.
« -'f>.i >:< >i< FJU ...
SAMPLES.
WATER
i 15.0'
20.0'
>0
15. u'
^<**f OiL-V SAND, SJLT AND
COARSE GRAVEL.
*>',<*••;< COMPACT FINE TO
COARSE SAND, SIUT,
LITTLE FINE TO COArSe23«0'
GRAVEL Sc LITTLE BRICK
FINE TO COARSESAND, CLAY,LITTLE ERiCX &LiTTLE MSOiUMGRAVEL — FILL
SANDY CLAY
_ >;<iii)(<*>X p-lNE TO MEDIUM SAND— SILT, LITTLE BRICK &" LITTLE MEDIUM GRAVEL
28.0
fUL.
REFUSAL AT 15.o'
BENT SPOON & nODi
JOaV
42.0'
. SANDY
BLUE CLAY
SANDY
BLUE CLAY
STiFF
ELUE CLAY
_9'SL
10
BOTTOM OF BORING
42.0'
>. {
:;lev. 240'=i
0,0'I SAND, CINDERS,
EKICK, CLAY Sc
LITTLE
MEDIUM GRAVEL
20,0'
£;AiSDY
ORGANIC SILT
AND
SHELLS
'*'•*-'i SANDYOF8GANIC SILT
^ AND3KAL2
{FRAGMENTS
26,0
1
SANDYIYELLGVy CLAY
28.0' VERY STIFF
J2.0'
40.0'
YELLOW CLAY
STIFF
BLUE CLAY
12
24
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BORiNG REPORT
GouoDCRs & Le McosunisR & Associates
/^^C. L GUIW CC
BOSTON
TO DN, MaooAcmijcetts
SITE LOCATION ^°}^J^...?!9.^J..*^}::..^f:f>*!~.>:}...^B.iJ.f.9.^. .';'). ^.!r'.r?.*(C6?^«..M;^.?.5.'f^S.':!.V!.S5.T.I.S..,
SCALE I'rz....?. FT. REFERENCE DATUM KROM INJ^ORMATtON ONDRAyviNGS __ _ _____
t
BOSiNC NO 2.4.A.. BORING :40. 24 3 DOSiNO NO. 23 CORING KO?.?...^..
.2S_
--20
io
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:0K1N!G REPORT
2 SC. L Guim cc
SOSTOM
CO., mC BOPJrv:© repopj
HAST PROV:
TO
SITE LOCATION
SCALE r= .8 FT.
GoL.DsEi5G Le MeccijRiEH a Associates;
's-.ci-;oGC .rs
South Postai.' Annex Addition"
''
'- ...ssachucetts
REFERENCE DATUM !f.39.^..^J^.?'.93.?^.*LJi.}.9.^...9.V...9~^}^.)!i'9S..
SORING NO.25 B
BORING NO..26
CORING NO..27 BORING NO..
0.0'
5.0'
El-EV., ?..8'
NO SAMv>i-ES
0.0
sr, c\, 07 01
• IciNDERS a GflVL '
1.0'f
"yiNC TO COAi-^SE
CAN3 Sc SONCZ
S'lNE TO COA.-^SEf
t GRAVEl. - Fll-l.
IWATER
I
17,3'"
EANOV
ORGANIC SH-"',
QRiCK,
33.0
33.0'
36.5
41.5'
WOOD, Cl-AY,
AND
OHC1.I.8
X1L.U
OKGANIC C.I-~AND CHE1.1_5
SO
6
7
IS
6
I3.C'
WATEFi
ORCAKiic r.:i_vAND F'.rAV
HAt^O. CANOYj Ijg
YCL.I.CVV CL.Ay I
1 24
FINZ TO COARSSI
' SAND ANDI
j
1.1TTI.S
jts-lNE TO MSOIUM
I
GRAVEL,
i^-.LL.
3A'.>!0, CaiCK,
WOOD AND
COAROZ GRAVEL.,
20.0';
BOTTO^v; O?' BORIWG
4L5>
4 — 15 — MWATZR READING VaKEN
ON 4""I6~60 AT i. i". »^.
BOTTO.Y. Oi' EOS INC
60.5'
43.0'
_.%MCY
ORGANIC £S11.V,
SHCL.US
AN3
TRACE Of
12
13
12
i£L.Ev, 24^2'_
t niCODERS C-GRVl-V
S'lNE TO MEDIUMSAND ANDSOME
fINE TO COABSEa RAVEL.
F1L.L.
4
VE.^Y STIF?
YEl-l_OW a OL.U!
Ci-AY
13.0'
I6a0'
24.0'
23.0'
SAND, BRICK.I-l-l., tSll-T Be
DiJ.'.d GKAVEL.
CUAY, SANO.
Glt-T
AND I.ITTL.S
MEDIUM COARSEGKAVEL.
43»0'
44.0'
SO.CSTIKP'
YELLOW CLAY
54. 0-
1
2S
I
I
SAND, OIL.T£
BRICK ti. eOMECOARSE GRAVEL'
{"•ILL
SANDY
ORGANIC StLT
AND
T.=5ACE Of
SHELL
A ^
20'
24
Q
I^ILL
12
SILTY PEAT
SILTY CLAYAND
LITTLE PEAT49.0'-
112! 53.0'r
60.5'
MEDIUM
31-OE CUAY
YELLOW/ ae BLUECLAY
MEDIUM BLUE
CLAY
„L^ SScB'l
16
8
4 — 1 U — 60i
WATER READING TAKEN ON
4 - 20 — 60 AT 10 A, M,
...{.5L§:..* INDICATES .V^UO LOST IN THIS LAYER 0.= SOIL fOOT^GE OF BG;...^;G THIS SHEE
WATER READING INDICATES SURFACE Or WATER AT COMPLETION O? BORING UNLESS NOTED OTHERWISE. FIGURES IN LOG COLUM^^ INDICATE
.,,,.„.. OF BLOWS TO DriVE2" SPLIT SAMPLER }.2,..,NCHES WITH.H.Q..,LB. WEIGHT FALLING.*.Q....INCKES UNLESS OTHERWIS^E K>ECIFlEa
' """^^RH/lUN E« CLASSIFICATION DY C.H..&..JKH JOS NO. 5^.^4.4.0 S!
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BOSTON PUBLIC LIBRARY
3 9999 06316 015 2
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