WITAT HAPPENED?
: On October 14, nalure dealt
4 Tetrace a cruel blow, ‘After a
“two week period. of prolonged
rainfall during. which over. 6.6
-inelies fell we were subjected to
aver 3 inches in about a 36 hour
period, "The resull was a con-
siderableamount of surface and
basement flooding.' The reasons

eomplicaled. than they. might

Sappear tobe: 2c:
Oo MIYDID [ft HAPPEN?

sencountered;. surface. flacding
“ahd sanilary sewer back ups.
>.” Surface -fur-olf, in Terrace’ is
“: 2¢ollected by ‘open ditches on
~~ both ‘sides’ of almost ‘every
. street in Lown,: These conduct
. slorm: waler -l0, one of lwo
places, Horseshoe), - Howe
Creek’ or :the: Skeena River.

i ground. becomes saturated thus
: -Teducing the storage capacity of.
7 the: soil’: A ‘sudden - intense
‘ ralnfall. is like . pouring excess
° Waler into a’glass already full.
"+ ‘The result is reduced absorption
‘by: perculallon into the soil and.
arise inthe ground water level,
- Since, {he ground can absorb ‘no
:* more'waler, all the rain must be.

- Because: of ‘the ,very. heavy
rainfall which fell on Terrace on
Uc tober 14, (213 million gallons)
te he storage capacity: of: . the

. diiches was-grossly.exceeded,
Thus water-found its way lo the
next lowest. spats, namesly.

4 _ financing as they now do‘with. - vO _
4 ‘fields, yards and basements. In” - Nicholson and. the Honorable sanitary sewers, 2/00 2 oe iad " ra
] some very “flat areas, for James G, Lorimer for financial I can assure you that your Seg nes PROPOSED
i example, Tuck, Hamer, Soucie assistance inthe form of grants. Council will continue in its ef Cy ; ; :
nt and McConnel, the problem was ane request has neither, been forts to have this recurring rae Ley cam TRU NK , :
compounde: the lack erties or. approved, - oblem rectified by continuing.“ .. mop :
grade in storm ditches which Discussions have taken. place. {is dialogue ‘with: the "sente : See ! STORM SEWER
# reduced their, flow capacily, with representatives of Central . levels of. Government ‘for: ee | oO .
2: As.‘as-tesull” of the ‘storage -Morigage and ~ Housing: Cor-.”' financial assistance. °° eu on a ie ee
“S capacity, of ditches. being ; _ ar oo “: \.. — ae ¥v

exceeded, (he water. in some
areas. covered ‘roads, . The

wasle} runs under lhe centre of
roadways and is connected to
"'.e suriace by manholes, When
ihe storm waler flowed over.the
roadways. il seeped through

sewer: syslem,’. Since the
sanitary “sewers. are - nat

. Of, waler generated’ by ‘storm
. ‘Runoff this water tends to build

up ¢yeales'a pressure within the

age

“ganilary sewer system.
: Although house laterals ‘rise
B form ‘the sewer mains, pressure

forces. water -\o-flow up them a

and into basements by way of
basement (loor drains,. ~ :

ihen has a direct bearing on the
ba¢k-up of sanitary sewers
where stormwater can’ in-
fillrate the. sanitary sewer
system by: way of manholes,

EOE -

And the. problem. of -sanitary —

sewer back-up is not caused by
the sanilary sewer system bul
by inadequale slorm drainage.

During the: past ten years...” ”
councils have been aware of the — ‘-
danger of flooding. in these, : =: /
areas and have restricted: —

ery

development -which did. not:

adequately provide security ~~.
against this threal, -Adequale™: ~.--
underground storm sewers‘’-”
must be now provided In sub-
divisidn- developments, > Until’ -

very recently the Municipal Act
did nol give Counell. the:
"> authority, to demand’ storm

’ Terrace.

for ‘ihis.. Hooding are: more -

‘Twoi major problems. were -

“During prolonged ‘rainfall '

‘° eatriéd by the storm ditches, ~

sanitary sewer ‘system (which «_
was designed solely for sanitary -.

% mankoldes into, thé sanilary °°
-designed to carry the quantities -* .

up inside. manholes,..‘This.bulld-.

ewer:ling.Exeass Wwaler must.°) 7 °0::-"*
_ gasoniewhera and Ils first route |.
“of escape is house laterals...
connecting every home to the >

‘Phe sturm drainage problem .

“1. Storm wa
. sanitary sewer. =...

flooding problem but would also
permit develapment = of
presenlly undrained areas,

Both these alternatives have:
_been considered by Council and

itis our conclusion that the

_beeond solution is of the

greatesl benefit to the people of
Many alternatives
were considered but it is felt
that this: provides the greatest
long {erm benefit. Ls

In - November. 1973,. Council
directed Administration’ to
proceed” with: development of
detalled plans to put ‘this

solution into action. In March’

1974,-Council endoresed a Plan
for the {nstallalion’ of -large

trunk sewers which. would be’
the first step. in..solving the-

problem, These. included the

installation of two major Storm ”

sewer trunk lines, one on Eby
and one on Braun. These lines

would inlersect the Howe Creek.
ditch on Eby. and on Kalum -
Lake Road; They will be deep -

enough (o allow sleeper slope to

_ be put on Howe Creek which

would improve its drainage
capabilily, It would also permit
installation of storm sewers on
individual streets throughout
town,

Because the cost of this major
program (estimated to be
$3,000,000 for sanitary and
slorm trunk lines) is beyond the
Communily's capability,

- submission .was made in April
1974, to the Honorable’ R. A..

Williams, the Honorable Lorne

’

the Provincial Government that

FLOOD —

. _Mayor Gordon E. Rowland

poration but at the present time
the existing regulations prohibil
their participation’ in’ gtorm -
sewer 5yslems.. 0. 7

WHAT. CAN THE CITEZENS

DO? a

1. If you have suffered.” are
damage during this last in’ ©
* eident conlact the Provincial . -

Claims Office located. in -the:

Trigo Building on Kalum Street. - - °
The telephone number which is “”’

635-9733. -- ue oo
2, Install a backwater. valve

in your existing sanitary sewer, =.

Jateral. if your. problem was

sewer back-up, (New sanilary 7.
- sewer laterals require these By- |.”

law). Information .on. ‘ac-
.ceptable’methods of installation

is available from the Municipal

Building Inspector.

_ This assistance in conjunction “ '
_ with the Districts $40,000 a year *

ditch cleaning program would
insure: the maximum af-
fecliveness of our present
storm drainage system. °
Assist he Mayor and Council
in their endeavours to convince

financial assistance. must. be-
forthcoming’ before _ this
drainage program can be un-

dertaken. 1 might suggest thal’ -

you write or phone Mr. Dent or

-Premier Barrelt, oe
Contact your M.P..lJona .° ..

-Compagnola, have her pressure. =.”

that passing of a Bill that will. :

allow C.M. & Housing to par-
ticipate in storm ‘drainage.

y=

an

jaace

ent eres

— pe

IL sere

TALEO Oa

THE HERALD, Wednesday, October 23, 1974, PAGE A3

d what to do

ads Ee

= a

EWER: BACK-UP IN YOU

'

TCH

OPEN oF

“Overflow -
‘to. fill sewer

‘flows down

;&. raise level. in

i
f

- manhole.

~ manholes.

main

Lote a ‘.

Pere _—

F overflows ditch at

aati

R BASEMENT

“LEVEL IN. MANHOLE.”
INA FLOOD SITUATION

‘Bll manhole of, ©

rant el

caret eb wR

‘9. Sanitary, sewer incapable of handling: water. ° ae
Water is forced up house lateral and into basement.
® were ammended.to include 3, ‘This may be prevented by a properly installed and.
these requirements: - ‘functioning ‘backwater valve. installed on house:
An‘ adequale underground . jsteral.. : : CO - at:

eeavided By TEE large 4, Backwater valve prevents flows from sewer from

diameter underground pipes: entering house... .. ;

which would collect water from. 5, Even witha backwater valve floor drains should be

roads and private property and. plugged during flood periods: a toilet flushed on main.
-would prevent accumulation of figor will push sewage out floor drains since the back-

ice Water In any one area. : .
ae e proach isone which Water valve has been closed by outside water
- pressure, :

.woyld not only solve the present

zt sewers, -As scori as (his was -
& given, appropriate By-laws

mH

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