HomeMy WebLinkAbout1978-07-24 Special MinutesJuly 24, 1978
7:00 P.M.
CALL TO
ORDER
ROLL CALL
OF COUNCIL
MEMBERS
DISCUSSION
ORDINANCE
NO. 1069
declaring an
emergency and
authorizing
the ruptured
water line
repaired
ADJOURNMENT
7:20 P.M.
TUKWILA CITY COUNCIL
SPECIAL MEETING
M I N U T E S
2 oil
Tukwila City Hall
Council Chambers
Twenty -four hour notice having been given, Mayor Bauch called the Special
Meeting of the Tukwila City Council to order. This is an emergency meeting
called to discuss a break in the 12 -inch water line that serves the
Southcenter South complex.
LIONEL C. BOHRER, GEORGE D. HILL, J. REID JOHANSON, DANIEL J. SAUL, DWAYNE D.
TRAYNOR, GARY L. VAN DUSEN.
Terence Monaghan, Public Works Director, reported that King County Hydraulics
discovered that a portion of bank was sluffing off into the river at
South 180th Street. The City staff inspected the site and found a bad
vibration. The valve was shut off and the vibration ceased. There was
obviously a water leak. The City of Kent was contacted and they agreed to
furnish emergency water service to the Southcenter South area.
On Friday, divers were sent down to investigate. There are two lines running
under the river, a 6 -inch pressure sewer line and the 12 -inch water line.
A piece of the water pipe and a set of fittings broke. The water line was
apparently unsupported when the bolt broke from stress, the flange broke
and took a 4 -inch piece out of the pipe. It looks like the pressure from
an eddy in the river caused the toe of the bank to wash away. This exposed
the water line.
Mr. Monaghan stated there are two immediate problems. First, there is no
fire protection to the buildings in the Southcenter South area, and second,
there is the possibility of a rupture to the sewer line as it is supported
by the 12 -inch pipe. His proposal is to get a contractor to back fill the
bank with big rock, then make a steel brace to fasten to the pipe in case
it should break again. One section, including a flange, elbow and a long
piece of pipe will be installed to repair the damage. The construction will
be done under a time and material contract. It is estimated that it will
cost between $10,000 and $15,000.
MOVED BY VAN DUSEN, SECONDED BY SAUL, THAT THE PROPOSED ORDINANCE BE READ.
MOTION CARRIED.
Council President Van Dusen read an ordinance declaring an emergency and
authorizing the Mayor and the Public Works Director to take immediate action
to have the ruptured water line serving Southcenter South repaired.
MOVED BY VAN DUSEN, SECONDED BY HILL, THAT ORDINANCE NO. 1069 BE ADOPTED AS
READ.
Councilman Bohrer said the presumption of an eddy seems feasible, but he
wondered if the pipe broke first causing the erosion to the bank.
Mr. Monaghan said that the pipe is three years old. The fire department
takes pressure tests in the area which usually run between 135 to 150 pounds.
On July 7, the pressure dropped to 125 pounds and has stayed there. It is
possible that the line broke first, but not likely. And, the excavation
doesn't look like freshly sheared ground.
Councilman Bohrer asked if the pipe was initially installed with backfill
over it? Mr. Monaghan said it was backfilled four feet deep.
Councilman Johanson asked if there was any reason to suspect the line wasn't
installed properly? Mr. Monaghan said, no.
MOTION CARRIED.
MOVED BY HILL, SECONDED BY SAUL, THAT THE SPECIAL MEETING OF THE TUKWILA
CITY COUNCIL ADJOURN. MOTION CARRIED.
r
y Clerk Maxine Anderson