Isthmian Canal Commission (U.S.).

Canal Record (Volume 4 no.1-52) online

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$0.4130 $0.3563 $0.5173
.0467 .0365 .0415


$0.4331
.0403




$5 . 2690


$0.9168


$0.5915


SI. 1518


$0 25M)


$0.3004


$0.5269


$0.3397i!$0.3003


$0.8412 SO. 5639 $0.4352


i$0.4597i$0. 3928 $0.5588


$0.4734


Filling center wall — Quantities








2.717J 2,717
















1 1






























1




























$6.6684 l $6.6684

.8028 .8028
















































Filling














.2042
.0016


.2042
































.0016






























































.04u:


.0464












1""












































$1.0634
.0780


$1.0634
.0780


















Admin, and general expense


































































$1.1414


$1.1414








1









♦Placing of "Masonry- reinforced" was charged to "Masonry" in May, no separate account having been kept.



DRY EXCAVATION— PRISM.



Table No. 4.



Detailed cost per cubic yard for quarter ending June 30,


911:




















Items.


Atlantic Division.


Central Division.


Pacific Division.


April.


May.


June.


Total.


April.


May.


June.


Total.


fApril.


Mny.


June.


Total.


Dry excavation — Quantities — cubic yards


74,030


58,982


5S.657


188,669


1,485,039


1,300,463


1.401,016


4,186.518


45,864


33,445


75,466


154,775




$0.0337


$0.0448
.1057
.0717
.0489
.1572


$0.0408
.0652
.0601
.0493
.1646


$0.0393
.0523
.0656
.0526
.1364


$0.0492
.0670
.0535
.0773
.0637
.0437
.0055
.0901
.1000
.0121


$0.0586
.0792
.0559
.0853
.0883
.0449
.0053
. 1030
.1000
.0117


$0.0554
.0576
.0421
.0821
.0737
.0440
.0042
.1011
. 1000
.0112


$0.0542
.0676
.0504
.0814
.0747
.0442
.0050
.0978
.1000
.0117


$0.0083
.0528
.1153
. 1731
.0549
.0257
.0381
.0506
. 1011
.0190


$0.0841
.0329
. 1464
.1522
. 1040
.0497
.0399
.0810
.1037
.0327


$0.0870
.0478
.1171
.1300
.0924
.0454
.0336
.0992
.1002
.0292


$0 0631




0461




.0649
0580
.0989


1229




1475




0838




0405












0363




.0744
.1190
.0147


.0460
.1190
.0188


.0959
.1190
.0202


.0719
. 1190
.0176


0809




1012




0269








$0.4636
.0411


$0.6121
.0595


$0.6151
.0366


$0.5547
.0455


$0.5621
.0447


$0.6322
.0570


$0.5714
.0426


$0.5870
.0478


0.6389
.0697


$0.8266
.0877


$0.7819
.0607


SO. 7492




.0692




SO 5047


$0 6716


$0.6517


$0.6002


SO. 6068


$0.6892


$0.6140


$0.6348


$0.7086


SO 9143


$0.8426


SO. 8184


Dry excavation — Prism, by contract —








31,400


28.420


32,288


92,108






































$0.2120
.1000


$0.3503
.1000


$0.2966
. 1000


$0.2843
.1000
























































,3120


.4503


.3966


.3843










Total dry excavation — Quantites^ — cubic


74,030


58.982


55,657


188,669


1,516,439


1,328,883


1,433,304


4,278.626


45,864


33,445


75,466


154.775








$0.5047


SO. 6716


$0.6517 $0 6002


$0.6007


$0.6841


SO. 6091


SO 6294


$0. 7086


SO. 9143


SO. 8426


$0.8184











DREDGING EXCAVATION— PRISM.

Detailed cost per cubic yard for quarter ending June 30. 1911:



Table No. 5.



Atlantic Division.



Pacific Division.



April.



May.



June.



Total.



April



May.



June.



Total.



Quan-
tities,
cu. yds.



I Quan-
Unit i\ titles,
cost cu. yds.



Unit
cost.



Quan-
tities,
cu. yds.



Unit
cost



Quan-
tities,
cu. yds.



Unit
cost.



' Quan- '

tides,
cu. yds.



Quan-
Unit ' tities,
cost. cu. yds.



Unit
cost.



.', Quan-
' tities,
cu. yds.



Unit
cost-



Quan-
tities,
cu. yds.



Unit
cost.



Pipe lines

Dykes

Clearing

Op'n, seagoing suction dredge
R'p'rs.seagoingsuctiondredge
Operation, ladder dredges. . .

Repairs, ladder dredges

Operation, dipper dredges . . .

Repairs, dipper dredges

Operation, pipe line dredges. .
Repairs, pipe line dredges.. . .
Op'n. tugs, clapets and scows
R'p'rs.tugs.clapets, and scows

Drilling

Blasting

Operation, drill barges

Operation, rock breakers ....

Small boats

Repairs, misc. equipment. . .

Plant arbitrary

Division expense



487,174
364,320
364.320
76.072
76.072
37,782
37.782



SO 0003
0321
0073
1242
0484
0904
0390



I



356.943
356.943
123,142
123,142
34,093
34.093



SO. 0296 300.337 $0.0310 1.021.600



1,444,450 $0.0001 406.1 13 SO. 0001



.0057|[ 300,337
.0746! 81,036
.0336:1 81.036
.1729'[ 70,725
2S37 70,725



Total division cost

Admin, and general expense

Total cost



Earth excavation — per cent .
Rock excavation — per cent



113,854
113.854
34.549
34,459



1422

I1IS4

.05811

08S6



478.174
478.174
478.174
478.174



,0027]
.0012
.0610
.0061



157,235

157.235

42,520

42,520



.



0138
0992
1149
1307
0720



.0680: 151.761
.0526 151,761
.0504 20,443
.06911 20,443



1,021,600
280.250
280.250
142,600
142,600



0309
.0087

0952
.0611

1301

1139'



.0614' 422,850,

0476 422.850 1

.1429 97,512

.3046) 97,512



.0856
.0658!
0725
. 12S2 1



176,521
176.521
179,631
179.631
49.961
49.961



0559i' 224.363 SO. 0409
05541! 224.363
1055 221.629
0456 221,629
1017 83.702
0373|i 83.702



220.786 $0 0414



0160 220,786

0465 229,962

0423 229,962

0545 71.494

0190 7 1.494



0051
0469
t.0060
.0677
0513



621,670 $0.0453



621,670
631,222!
631,222]
205.157
205,157



.0233
.0634
.0251
.0706
.0347



514,178 .0016 452.098

514.178! .0035 452.098

514. 17S .0610 452,098

514,178 .0054 452.098



.0031 1.444.450

.0012 1.444.450

.0610 1.444,450

.0185 1,444,450



229,592
229,592
20,563
20,563
20,563
20,563
00241406.113
0020' 406,113

0610:1

0061: 406,113



0734 305.331 0573 301,456 0616'



.0298 305.331
0144 23.190:
0019 23,190

.4766 23,190
0691 23.190
0038 529.694
0042 '529.694



O229l|301.456 t.0080

3.050
. . . 3.050
4808 3.050
0631 3,050
0023 522.242
0012 522.242



3.5938
4991
0026:

f.0008



836,379:

836,379

46,803

46,803

46,803

46.803

1.458,049

1.458.049



.0633
.0137
.0063
.0008
.6818
.0942
.0028
.0013



0061 529.694 0046 522,242 t-0011 1.458,049 .0030



478,174
478,174



$0 2333.514.178 $0.2023 452.098 SO 2335; 1,444,450 $0. 2221
0209 514.178 .0178 452,098 .01851 1,444,450 0191



SO. 2542 514, 178S0. 2201 452.098 $0.2520 1,444,450 SO. 2413



443.625
34.549



92.77
7.23



471,658 91.73 431.655 95.48
42.520 8.2711 20,443 4.52



1,346,938 93.25
97,5121 6.75



406.113 SO. 2333 529.694 $0 1509 522.242 SO. 1089 1,458,049 $0. 1588
406.113 .0357 529,694 0227i'522,242 .0153 1.458.049 .0237



406.113 SO 2690 529.694 l $0. 1736' 522,242



385,550
20,563



94.941 506.504: 95 62 5 19.192
5.06J: 23.190; 4 38! 3.050

II I II



$0. 1242



99.42
.58



1,458.049 $0. 1825



1,411.246 96.79
46.803 3.21



NOTE — The total cost of the Dredging Plant had been absorbed at the close of April, hence no charge appears for this quarter,
flndicates credit.

STONE PRODUCTION.



Table No. 6.



Detailed cost per cubic yard for quarter ending June 30. 1911:








.












Porto Bello Quarry.


Ancon Quarry.




April.


May.


June.


Total.


April.


May.


June.


Total




68,746


58,483


60,704


187,933


58,279


58,893


62,997


*227.821








$0.0259
.0375
.1373
.0728
.0613
.0220
.0197
.0542
.3300


$0.0173
0376
.1810
.0812
0693
.0727
.0244
.0945
.3300


$0.0029
0355
1701
0803
0666
0400
. 0223
.1189
3300


$0.0158
0369
. 1615
.0778
0655
0436
.0220
.0876
.3300


SO. 1010
.0472
.0384
.0477
.0956
.0355


$0.0684
.0515
.0437
.0437
.0905
0268


$0.0442
0518
.0438
.0347
.0568
.0347


$0.0557




.0397




.0332




.0331




.0636




.0256








.0616
.2400


.0252
.2400


.0324
.2400


.0312




.2400








$0.7607


SO 9080


SH X(,t,f,


SH S407


$0 6670


$0 5898


$0 5384


$0.5221




68,746


58,483


60,704


187,933


58,279


58,893


62,997


227,821








$0.0246
.0219
.0421
.1212
.1700


$0.0360
.0209
.0522
. 1068
. 1700


$0.0266
.0165
.0476
0939
.1700


SO, 0288

,0198

0470

1079

. 1700


$0.0225
.0034
.0147
.0352
.0740


$0 0200
0051
.0206
.0292
.0752


$0.0164
.0037
.0207
.0643
.0747


SO. 0155




.0032




.0148




.0343




.0737








$0.3798


$0.3859


$0.3546


$0.3735


$0.1498


$0.1501


$0.1798


$0.1415








$1.1405


$1.2939


$1.2212


SI 2142


SO SI 68


$0.7399


SII 71 Si


$0.6636




68,746


58,483


60,704


187,933






















$0. 1833
.1345
.1710


$0. 1675
.1713
.1710


$0. 1594
. 1490
.1710


$0.1706
.1507
.1710










































SO 4888


$0.5098


$0.4794


$0.4923












68,746


58,483


60,704


187,933






















$0.1093
.0184
.0627
.2070


$0.1086
.0212
.1180
.2070


$0.1300
.0181
.1056
.2070


S0.11S8
.0192
.0937
.2070




















































SO 3974


$0.4548


SI) 4607


$0.4357 l|










24,115


20.996


21,529


66,640


58,729


58,893


62,997


227,821








SO 0756
.0149


$0. 1107
.0137


$0.0992
.0129


$0.0943
.0139


$0.0379


$0.0377
.0095
0068
.0136
.0600


$0.0423
.0023
.0104
.0274
.0600


$0.0312




.0031




.0081
.0061
.0600


.0067




.0806


.0727


.0701


.0747


.0126




.0600














$0.1711


sii 1971


SO. 1822


$0.1829


$0.1121


$0.1276


SO 1424


$0.1136




$0.0281


$0.0307


$0.0337


$0.0307


$0.0253


$0.0244


$0.0203


$0.0184








S2. 1 1 48


$2 1600


$2 2596


$2.2379


$0.9542


$0.8919


$0.8809


$0.7956



♦NOTE — Under "Total Quantities" 47.652 cubic yards have been added, to adjust the difference between cross section measurements of stock pile and book
balances. This amount wae not added to monthly quantities.



SAND PRODUCTION.



Detailed cost per cubic yard for quarter ending June 30, 1911:



Table No. 7.



Items.



Dredging — Quantities — cubic yards .



Operation, dredges

Maintenance of equipment .



Total

Plant arbitrary.



Total cost of production . .
Towing — Quantities — cubic yards.



Operation, tugs and barges .
Maintenance of equipment .
Plant arbitrary



Total

Jnloading — Quantities-



cubic yards



Operation, cableways and cranes

Power

Maintenance of equipment

Plant arbitrary



Total

Rail Transportation to Storage — Quantities — cubic yards.

Operation of trains

Repairs to tracks

Dumping in storage

Maintenance of equipment

Plant arbitrary



Total

Division expense

Total lost in storage .



NOMBRE DE DlOS.



April.



47,801



$0.1548
.0129



SO. 1677



SO . 4800



SO. 6477



May.



SO. 2188
.0085



$0.2273



S0.4S00



*S0.6945



47,801



$0. 1875
.1407
.2110



SO. 5392



47,801



SO. 1114
.0162
.0571
.1620



SO. 3467



12.133



$0.1342
.0265



$0.3039



SO 0061



$1.6168



40,003



SO. 1806
.1809
.2110



June.



Chame.



April, i May.



24.236



SO. 3057
.0538



$0.3595



SO. 4800



112.040



$0.2103
.0202



$0.2305



$0.4800



36,663



$0. 1265
.0464



$0.1729



35,903



SO. 1091
.0255



SO. 1346



June.



38,954



$0.1170
.0338



SO. 1508



SO. 0300 i $0.0300 $0.0300



$0.8395 *S0.7059 ' $0.2029) SO. 1646 SO. 1808



24,236



112.040



36,663 "35,903



$0.2380 I SO. 1960 | SO. 1213 SO. 1238
. 1707 .1615 .0653 ! .0134
.2110 .2110 ! .0700 .0700



38.954



SO. 1085
.0453
.0700



SO 5725 SO 6197 si) 56S5 SO 2566 so .Mi;.' SO 2_MS



40,00.',



24,236 ] 112.040



36,663



$0.1118
.0192
.1104
.1620



$0.1419
.0157
.1045
.1620



$0.1181
.0172
.0864
. 1620



$0.0594
.0312
.0603
.1044



35,903



$0.0620
.0308
.0417
.1040



$0 4034 $0.4241 ' SO 3S37 $0.2553 I $0.2385



38,954



$0.0729
.0273
.0383
.1032



$0.2417



17.517



SO. 1107
.0137



SO. 1971



$0.0065



$1.7632



11,957



$0.1034
.0134



41.607 i. 36.663



$0.1155
.0173



$0.1900 $0.2262



35.903



38,954



$0.0487
.0275
.0065
.0079
.0800



$0.1706



$0.2011 ; $0.2138



$0.0125 I SO. 0290 , $0.0131 i $0.0152 $0.0160



$1.9895 ! $1.7497



$0.8985



$0.8266



SO. 8761



Total.



tl24,372



$0.1054
.0316



$0.1370



$0.0300



SO. 1670



124,372



$0. 1055
.0373
.0700



So 2128



124,372



$0.0582
.0267
.0418
.1035



$0.2302



124,372



$0.0517 I $0.0473 $0.0441

.0376 l .0423 .0322

.0123 .0131 .0096

.0195 | .0311 .0177

.0800 I .0800 .0800



$0 1836



$0.0132



$0.8068



*Dry excavation is credited with S515 25 in -May on account of adjustment, but no yardage was accomplished. The total cost of production includes this amount
and. for this reason, the cost of dredging, plus plant charge, does not equal total cost of production.

tNOTE. — Under "Total Quantities." 12,852 cubic yards have been added, to adjust the difference between cross section measurements of stock piles and book
balances. This amount was not added to monthly quantities.



HYDRAULIC EXCAVATION-PRISM.



Table No. 8.



Items.


Atantic Division.


Pacific Division.




April.


May.


June.


Total.


April.


May.


June.


Total.




5.350


5,500


3,500


14,350


33,509


18.353


53.858


105,720












$0.1794
. 1060
.1175


$0.2815
.1413
.1457


$0.1036
.0949
.0731


$0.1585
.1065
.0997














$0. 1291


$0.3231


$0.5705


$0.3111
































.0772
.2614
.0678
.0230


.0923
.4482
.0785
.0336


.0771
.1919
.0608
.0146


.0798
.2584
.0661
.0206






















.0076


.0142


.0318


.0161






SO 1367
.0176


$0.3373
.0379


$0.6023
.0649


$0.3272
.0369


$0.8323
.0780


$1.2211
.1054


$0.6160
.0379


$0.7896
.0623








$0.1543


SO. 3752


$0.6672


SO. 3641


$0.9103


$1.3265


$0.6539


$0.8519





MANUFACTURING CONCRETE PILES.



Table No. 9.








Items.


Atlantic Division.




April.


May.


June.


Total.




10,002


5.904


5,760


21 666








$0.1024
.0750
.0178
.0358
.0334
.S584
.0922
.0053
.1794
.0114


SO 0828
. 1176
.0255

.1157
.0711
.7276
.0344
.0054
.1700
.0170


$0.0760
.1145
.0080
.0512
.0323
.6346
.0786
.0114
.1700
.0210


$0.0900




Sand






0617








7734




0729




.0069




.1743




.0155








$1.4111


$1.3671


$1.1976


$1.3525



CANAL




RECORD



Volume IV.



ANCON, CANAL ZONE, WEDNESDAY, AUGUST 16, 1911.



No. 51.



The Canal Record

Published weekly under the authority and supervision oj
the Isthmian Canal Commission.



The Canal Record is issued free of charge, one copy
each, to all employes of the Commission and Panama
Railroad Company whose names are on the gold roll.
Extra copies and back numbers can be obtained from the
news stands of the Panama Railroad Company for five
cents each.

Address all Communications

THE CANAL RECORD,

Ancon, Canal Zone,

Isthmus of Panama.
No communication, either for publication or requesting
information, will receive attention unless signed with the
full name and address of the writer.

NOTES OF PROGRESS.



Equip Tugs for Fighting Fire.

It has been decided to install pumps and
nozzles on two of the tugs of the Pacific Divi-
sion at the Pacific entrance to the Canal,
for the better protection against fire of the
docks and other buildings at Balboa. At
present, only one of the tugs, the Bolivar, of
the Panama Railroad Company's service, has
fire-fighting appliances.



Panama Railroad Relocation.

The contractor, J. B. Hull, who had the
contract for excavating a section about one
and one-half miles long on the relocated line
of the Panama railroad, opposite Las Cas-
cadas. has completed his work. Standard gage
track has been laid from Gamboa to the
crossing of the Sardanilla River, and, except-
ing about half a mile in this section, standard
gage track has been laid the whole length of
the new location between Gamboa and
Paraiso. All of the track is not to grade.
Work on the trestle over the Sardanilla River
has been begun.

A 90-ton steam shovel has been set at w-ork
on the cut back o f Paraiso replacing the 70-
ton shovel that has been operating there.
Four 70-ton shovels, and one 90-ton, are now
working between Gamboa and Paraiso.

Canal Work in July.

The grand total of Canal excavation to
August 1 was 145,486,536 cubic yards. leaving
to be excavated 41,727. 50S cubic yards, or
less than one-fourth of the entire amount for
the completed Canal. These figures are in
accord with the new estimate of July 1, 1911,
w-hen 4,676,278 cubic yards were added to
the estimate of July, 1910, to include material
in the slides in the banks of Culebra Cut,
making the total excavation for the entire
Canal 187,214,044 cubic yards.

The total for July was 2,518,982 cubic
yards, as compared with 2,406,288 cubic
yards in July, 1910, and 2.S43.260 cubic yards
in July, 1909. All the excavation was 'work
excavation," there being no "plant excava-
tion."

The dry excavation amounted to 1,566,167



cubic yards, and was principally by steam
shovels. The dredges removed 876,115 cubic
yards, and 86,700 cubic yards were sluiced, in
addition to the amount pumped into Gatun
Dam by suction dredges. The progress on
the locks at Gatun, Pedro Miguel, and Mira-
flores is referred to elsewhere in this issue.

In the Atlantic Division, the total exca-
vation was 490,217 cubic yards. Of this total,
65,022 cubic yards were dry excavation, and
the remainder was removed by the dredges
in the Atlantic entrance. •

The total excavation in the Central Divi-
sion was 1,360,117 cubic yards, all of which
was from the prism.

In the Pacific Division, the total excavation
was 668,648 cubic yards, 598, S76 cubic yards
of which were taken out by the dredges at
the Pacific entrance, and 69,772 by the
hydraulic excavation plant at Miraflores
Locks.

A detailed statement of the excavation, and
a summary of the work on the locks and
dams, follow:

ATLANTIC DIVISION.



Locality.


"Work."
Excava-
tion.


"Plant."
Excava-
tion.


Total

excava

tion.


Dry excavation —
Locks. Dam and Spill-


Cu. Yds.

6.897
58.125


Cu. Yds.


Cu. Yds.
6 897














Total


65.022




65.022


Wei excavation —




425.195






Locks. Dam and Spill-














Total


425 195




425.195






Total wet and dry


49«,217




490.217



CENTRAL DIVISION.




Dry excavation —
Culebra Cut


1.337.833
5.356

16 928




1,337.833

5.356


IVet excavation —




16,928








Total


1.360.117




1.360.117



PACIFIC DIVISION.



Dry excavation —
Locks. Dams and Spill-


104.157




104 157








Prism, south of Pedro


43.799




43 799








Total


147.956




147.956






520.692










520 692








Total


520.692




520 692






Total wet and dry


668,648




668 .64S



TOTAL CANAL EXCAVATION




Dry excavation


1.556.167
962.815




1.556.167
962,815








Total


2.5IS9S2




2.51S.9«2



Mean rainfall along Canal (eleven stations) 6.87
inches.

By "Work" Excavation is meant excavation actually
made for one of the constituent parts of the Canal,
such as Prism. Diversions, or Locks, etc.: that is, it
represents material taken from the area to be occupied



by the Canal, and constitutes excavation useful for
the completed Canal.

By "Plant" Excavation is meant excavation outside
of any of the constituent parts of the Canal, such as
Prism. Diversions, or Locks, etc. It includes material
necessary to be excavated for construction purposes
only, and is chargeable against the particular plant
item for which it is performed, such as Prism, Diver-
sions. Locks, etc.

DAM AND LOCK CONSTRUCTION.



Material.



Concrete laid in locks.
Concrete laid in dams

and spillways

Fill placed in dams i



Atlantic. Pacific



Cu. Yds.
71.046



5.935
526.943



Cu. Yds.

52.746



Total.



94.237



Cu. Yds.
123.792



5.935
621,180



Atlantic Terminal Docks.

Work on the second of the docks at the
Atlantic terminus of the Canal has been
begun, and requisition has been made to the
Washington office for materials to be used
in this dock, and dock No. 16, already in
process of construction. The requisition calls
for steel caissons and reinforcing iron, and
a requisition to be placed this week, will
provide for the I-beams to be used in the
floor system. An article in The Canal
Record of May 31 gave an outline of the
general project, and a plan of the series of
six docks, only two of which will be erected
at this time. One of them, dock No. 16, will
be accessible for ships on one side only,
because the other side will abut on a fill,
which will become part of the mainland. Dock
No. 17 will be 300 feet west of the face of
dock No. 16, and will jut out from the mole,
which is being extended from the shore as a
means of access to the system of docks.

The caissons for dock No. 16 will be 4 feet
in diameter, and the materials required con-
sist of 2.382 intermediate sections, 2,625 ring
bands, 2,382 vertical splice plates, 243 bot-
tom sections, 243 vertical splice plates for
bottom sections, 243 bottom reinforcing
bands, 271,000 button-head rivets, f-inch by
2 3-S inches long; 19,500 countersunk rivets,
J-inch. The total weight of these plates
will be 4,000,000 pounds. The caissons for
dock No. 17 must be sunk to greater
depth than those for the dock nearer shore,
and, therefore, will be 6 feet in diameter.
The materials required consist of 2,492
intermediate sections, 2,707 ring bands, 2,492
vertical splice plates, 215 bottom sections,
215 vertical splice plates for bottom sections,
215 bottom reinforcing bands, 379,200 button-
head rivets, j-inch by 2 3-8 inches long,
25,300 countersunk rivets. J-inch. Delivery
of the plates, which will be of finch com-
mercial low carbon rolled steel, will be begun
by October 15. The plates will be bent and
riveted at Cristobal shops. Reinforcing iron
for the concrete sheet piling consists of 4,500
pieces of steel bar, 7-8 of an inch square and
18 feet long, approximate weight 210,610
pounds.

Plans for the construction of dock No. 17
have been approved. They provide for a



402



THE CANAL RECORD



Vol. IV., No. 5 J.



NOTES OF PROGRESS.



{Continued.)



dock 1,000 feet long and 155 feet wide, instead
of 150 feet, as in the preliminary plans, and
for open built cylinder substruction, instead
of the single row of cylinders with concrete
piling bulkhead, as provided in the original
plans. The floor system will consist of steel
girders embedded in concrete, and will bear a
load of 1,000 pounds per square foot. This
last change is made to expedite construction,
and the widening of the dock is to make it
possible to divide the space into symmetrical
bays 27 feet wide It will be paved with
brick, instead of concrete, as at first provided.
Two depressed railway tracks will extend
along the axis of the pier. The dock will be
constructed upon 215 steel caissons 6 feet
in diameter, built up of sections 5 feet long,
and varying in length according to the depth
to hard rock. There will be 13,103 feet of
caisson below mean tide, and 430 feet above
mean tide. The floor area will be 154,078
square feet. The items entering into the bill
of cost, are:

Steel caissons, 5,879,604 pounds, 2,707
sections; caisson shoes, 62,172 pounds; con-
crete to top of caissons, 14,170 cubic yards,
top of caissons to floor, 1,576 cubic yards, con-
crete in floor, 3,805 cubic yards; concrete in
curb wall outside of wharf, 25 cubic yards;
concrete in beams, 4,796 cubic yards; concrete
in haunches, 223 cubic yards; total concrete,
24,595 cubic yards; paving brick, 129,312
square feet; girders, 6,570,182 pounds; I-
beams, 78,064 pounds; angles, 188,160
pounds; plates, 7,501 pounds; reinforcing
rods, 925,662 pounds; 24 mooring bits, 12,480
pounds; bolts, 9,500 pounds; fender piling,
33,150 linear feet; timber for walling. 20,000
feet; false work, 4,050 feet; permanent track,
4,000 linear feet; reinforcing French rail, 165
tons; 4 Ellis bumping posts.