The Helena independent. [volume] (Helena, Mont.) 1875-1943, 1893-07-09
NEW COUNTY BRIDGRa
The More Impovtant Onss Osaevsa 3hen.
Ysav Have Hssa Csa pissed,

The More Important Ones OgdeVoa m
xeav Have Mssa Csa apietsd.
The hoard Of county eonmissioaese y
Lewis and Clarke oouaty have seesaNlv
been notified Of the completion 81 ~ Y Y.
portant bridges, which Ahsy soatsasle1 ~
about the hsst part Of This yoas. The
largest and most tmpoStant Of thssa slsuo.
turos Il Ahs bridge crossing The Deaehosn
river, on the lime of ths county road To-
Craig on Wolf creek TO Auausta. 0uek
annoyance and damage 70 tSaide IN thio
section hiss resulted from the oeyoSal
bridges. which n former % y, yssss xsss I!sesa
AZ the stages sf high water. The Deasboyn
river drains large water she'd and ~
waters Of its tsibutafiss, psnstsatina . 0ke
summit Of M. main divide Of NJ Noe6y
mountains. collect rapidly iAto We nais
stream dusing ths'asoA season. svs!lisG ~
river TO large prepo'stons and producing
The present board Of county sommlaaiea.
sra, II. w. knight, chairman, II. ID. EdaeFs
ton and John Hossky. after having 90
conditions carefully examined and -
ported upon by compssens naiasesA dstes-
which would give every assurance Of main
tanning the travel during the food eeesen.
| The bridge which they contracted fos anA
which now spans the stream hse aleae
roadway OF sixteen fest and consists Of ono
through combination truss OF 160 fonS span.
foot span and $50 feet OF pile appyoaeh.
Three hundred and nfty feet Of shore pro.
lection was also put In nader the contrast.
Tho piers ars constructed Of piles and con-
crete encased BY iron cylinders and az
., otsctsd by timber cribs filled With seck
and the timber cribs protected With rip ~,
The north abutmsnt ID close timber osjh
filed with concrete and protected BY ma
sonry and rip rap ~ Ito base. The 180 fooe
and the ninety foot spans have ! saSSyipe
capacity OF 1000 and ]. 260 pounds respect
lively per linear foor Of bridge. exclusive of
was q. .470 and was opened for travel abeot
the middle Of last month.
The next bridge in size and importance,
recently finished. 10 thst across the Little
Prickly Pear creek, located about one ana
one-hslf mites up stream from ths Wolf
way. This bridge replaces ths fssmss
4 county bridge which was washed away dur
4 ing the high water Of June Of last yeeS. q
4 the tins the Montana railway suffered -
severely from high water IN the Little
Prickly Pear creek. This bridge has eleaH
roadway Of sixteen feet and consists OF ono
through combination t1uss of ninety Sese
span and IA feet Of pile approach. The
| carving capacity OF truss 10 1200 pounds
or linear foot Of bridge. exclusive q dead
weight and the sub-ssSucsurs 10 OF the eamo
chat acter a. that employed ON the Pliers q
the Dearborn river bridge. The to1sl cost
OF the bridge was $2.526 and was opened
for travel the latter part OF last month.
Both tho Dearborn river bridge and thae
over the Little Prickly Pear creek wese
d built undsr eontrasts with Hugh 4 Cooper,
of Spokane. Wash, manager q she Ban
EFraneisco Bridge company. g. Kserl
Of Sizer q Kesrl, engineers Of this city,
was the engineer in charge Of constTuctien,
! and c. N. Arnold assistant engineer. CE
Smith was forsmsn for the bridge oom-
pany.
The report Of the engineer u charge
shows the work Of the contrsotoTs 70 havs
been done throughout In an admirable
manner and the county oommiasioneSs,
from all reports, feel encouraged 70 believe
I shat they now have some bridges whish viii
Withstand the foods Of future years and b.
available for travel at all times, and ths1
they have been secured ~ minimum cost.
The work Of repairing and snisHRing The
county bridge over the south fork OF HuA
river. near AuRusts. has bssn somplessd sn1
constitutes most important improvement
I in that oJtiOn.