The Dorset County Express and Agricultural Gazette.
Dorchester, Dorset, England, 1872-01-02 00:00:00

DRAINAGE OF WEYMOUTH.

MR. COODE'S REPORT.

CoNADI:RATION OF VIE VARIOUS SYSTEMS FOR

DISPOSING OF TOWN SEWAGE j

ADOPTION OF TUB IRRIGATION SYSTEM.

Outlay of £26,000.

A special meeting of the Weymouth Town Coon*ll
was hold last Theriday morning. Present —The Mayor,
Aldermen Aylltig, Thompson, Tisard, sod !toward;
Councillors Vinoont, Luce, Vertu% Commins, Webb,
JoLn Dtvenlsb, 'Talbot, Groves, Roberts, AO)+, Betts.
S•uipson, Thomas, Ayiesbuty, and Henry Devenish.
The bu ioa wma to consider the followlnr report
hi Mr. Cook, CS., en tLe drainage of the town. It
id Le saeu that the plan i. to dam the asok ester,
bring all Lb@ sr: wage to one pls.; sal sumo it to •
Ithar level, that it may be otitis-11 on a iown,y irriss-
two ram. The expo.° is estimated at nearly £2B 000.
So thoroughly has Mr. Conde reasoned the matter
out that oonsideration of the plan may bo left without
remark.

2, Westminster Chambers,
Vietorlamtruet, Wostininater,S.W..
Llad December, 1871.
To the lltynr, Aldermen, and BUIVC44Oc of the lier.m4h
of Weimmatn, acting as the Land llotrd of Health.
WETMOUTH DAAIXAGS. ALC.

Gentleman,— Antos upon tLo instructions comp
municated to um when 1 attended at Weymouth in
October to giro certain explanations with reference to
my preliminary report upon the disposal of tho sewage
of the Borough and upon the treatment of the Buck.
water, I bog to submit a report ou the subject generally,
embedying the conalosiogui at which I have arlived
after a careful consideration of all the if Catil cud data
which have now been obtained.

Tee detailed examination hoe necessarily stoa=
headed a series of sections of the Baokwater and m
Into it. bed; exact observatilns upon the tidal range,
and upon the tidal currents through and outside the
Harb,iii:; together with. survey of the shorea of the
Bazicwater between Weymouth Bridge and the Timber
Ltridgc, opposite Little Geor4e-street. Simultaneously
with these I Love had levels taken of the (Waling
drains and sewer. at a few of the principal points along
thvir °aurae, and at the whole of the outlets, with
paiticulms of the camactcr of conatrnotion ul each of
Coup. I should hero remark that this investlgatioe
has further developed the formidable difficulties ri.forred
to by Mr, Ilawirslty as surrounding the vcry uoeop-
-111.n

8.161r0 prOG,C.IIII4 foriter t appmrs t • Lc
that I should hero rmapitelate, 11.4 briefly as posaible,
the Dmoniumudstious megabit.' is ay rep.itt of laps*
last, whieh were made aubjeet to mesilleation atter
obtaieing the remits of the examiestionjuat dratribed.
Them recommendations w re to the eff.et tlist, if the
levels permitted. • tank or tank, Mould be omuitrected
both as the Malco.nbe and Weymouth side; arid so
arranged that the sewage lamella beadle...red into the..
atoll hours, bat let out only at the early part of the
ebb, with • view to its being itivried beyond the limits
of the Harbour. Failing this arr.ngentent from the
absence of the requisite fall, it woe proposed to con-
suet 000 ilitreMptiag /ewer to Gamey all the sewage
of the north eastern port of Ifolcionah3 It.igis to •
poit as far below the end of Little G •orgemmeet a.
ti, lest. w0u.,1 perinit. Smthward o! this it was
prop:mad to have auether intereepting a or. wi:h its
outlet just blow Woyukoath Brilie, Vitt being
intended to take up all the iirsine in the soatii-vrest.na
pertiom of Meloanihe excepting the three existing
east.aemost draies, which were to be carried down in
out-iron trunks to such a point as wank bring their
outlet+ below the level of the lowest tiles.

Oa the Weymouth side it was proposed to have owe
intereepting sewer leading from the extreme southwest
sorter of the Beekerater to a point below Weymouth
Bridge, tad another running eastward of this, with
an outlet somewhere shout the sod of Cove Peerage.
lb wee further reeemneeded, in order to ensure the
permanent enbmerg one of the objectionable mud
!mkt—that at euibanknont dam ottani I bo carried
across the Backwater from the upper end of the yard
oecuided by Means. Normtn sod Co., near the bottom
of School-street, to the projecting point of the wester,
there about 70 yardi south of the Back miter Bridge—
this being the narrowest pert of the estuary.
An exact comparison of the tidal range in the Beak.
water, with the Lives of the streeta In the north-
eastern portion of Meloombe Ilegia, together with the
results of the recant observations upon the tidal
currents throu..lll the Harbour and outside its entrance,
have developed these important faits, via
. . . .

lot. rill-% the lowesT:Or most southerly point at which it
would be possible to form t.lo• outlet of the north.
eastern intercepting sewer, will be at, or in the
insensliale vicinity of, the west end of fichool-street:
Indly That, as I mw reason to apprehend, the levels will
not allow of the construction of Tanks at such an
elevation as will admit of the sewage being
Macherged therefrom during neap tides ; and
3rdly That it not unfrapiently happens that the ebb
currents from the lisxbour an so impeded Used
WOO portion of the water OM consiquentiy of
mitten is tospention therein) are earned back
into the harbour upon the low of the succeeding
tide.

In view of thole unfavourable oonditiona it is evident
that the discharge of the sewage into the tideway in
the same state as it leaves the sewers—i a. bath 53114 s
and fluids—mono! fail 13 be ultimately attended with
ansatisfactory results.
_ . _ _

A careful study of these facts, and other Ist). which
have been arrived at by means of the repeat investiga-
tioo, has lel nil to certain definite c3nelusints, which I
shad now prorated t describe by means of the two
soaompanying drawings which have ben prepared for
the porpose.2f elucidating this report,

I.).neius No. lis a gene plan of the Borough,
hherrii.; the wo hi which I hive now to propose,. ohm
No. 2 cantatas, utiao a 11.;,r .Tc.le. p oof th,g
portion of the Backwater baJw the Timber Bri Igo at
Line. George-street end the bridge across the
Haaour at the e..d of St. Tharuas-strect—the same
drawing also show*, both no plan est e..ation, the Werke
h.... Matter %commended.

--fieTn-Witai-l-ha-v-o-air,Tady stated, it becomes impel..
aecordieg to my view, to resort to souse method
which shall dispose of the sewage in a more satisfactory
eel prefitaulo manner than by discharging it into the
—certain'y steps should ho taken. as speedily
as possible, for excluding the solid portions of the
aerago from the Ilmbour pending the completion of
works for it. utilisation. In tne case of a Watering
Place is. I.raely rotor:ea to and parasitising such
• tutagcs as Weymouth i does n otter respects, there
Lhould he tho most complete and entire abaenoo of
otojtation on the more of sewage disposal. It appear' to
, me, therefore, that the paramount object in this eau
Monti he efficiency, the en .stioo of the attendant
expenditure being governs.i solely by the oonaidera-
tio s t'lst it should be the lowest in amount that
sill b • consistent with the att stamen% of such ellioUnoy.
Dull_ I by the rinciplos jut laid down, I have to
. nom nd for is...optlon the following Works. In
the AM it 0,.: h • .!e•ir idle to precool with the
caustruntion ol the Eml.oth new. or Daus scrota the
fiaskwater immediately to the northward of the ysrd
oecnoio i by Mem. Norman and Ce. ras in Heated upon
gr 551040 No. I and 2, Tho general character of c
c.
atruatira adopted in this Dam would ho as follows :
Tt, • top of this Datu would ho pliced about 3 lashes
be:o• the level of high water of ordinary neap tide. I
have adopted CAA level as bolos the lowest which Would
ensure the covering of the mad b.nks In the Limits
water, without excluding such • quantity of tidal water
as would pr. judiarally affect the Harbour. There would
ix, a depth of 311. 6m. over the top of this Dam at high
water of ordinary spring Tides. In the Dao. and at the
centre of tho present low water Channel, there would
he an entrance, having a clear width of opening of left.,
, to admit the Passage of barge, and boats, with a
dopth of 6ts 6:na. over the sill at high water of
ordinary springs. The entrance would be provided
with a nate, in order to retain the water at the required
level
In the aotith•west corner of the Bsckwater, near the
Gas. Works, I have shown an embankment to exolude
tho tide not reoommended la my previous report . the
mode in which this work would be executed is siown
by tiration No. 3, Dr...iDg No. 2. The salient angle at
the north end of the Gas Works should be oat off, mad
the ewengering angle filled up In the manner indfarraed
by the red dotted ion upoa Drawing No. 2.
I now come to WI imP°oo9l questionth• '
p tins sewers. pop slat i may remark that *sew
has been oousiderabra &Moult, in them in a
notbyoommoly on •
assoosnratiaafthe
abeemothealerels.,
ofiaddthenct°groraYer, but aloe'
system In the laihg out of the drains
and sewers already aerating in the tows.; it ha; oi
(mune. bran a material °Wan without me. to avoid the ,
distasbenws of the pipes sad drama *lila hare been