HomeMy WebLinkAbout2001-08-15 PW Dir. Memo to B.O. Re Sewer & Water Svc ChangesC Ly Of
Oak Park HeI is
14168 57 h Street N.• Box 2007 *(.yak Park slei g hts, N 55 082 Phone (6 5 1) 439 -4439 Fax 439 -0574
Interoffice Memo
To: Buildin Official, Propert file
From: Public Works Director, Ja Johnson, PE
CC: Cit Administrator, Cit En Communit Development Director
Date: 08/15/01
Re: DDD LLC Sewer and Water Services Chan
In order to save the trees alon 55th Street the sewer and water lines are bein relocated
to cross under the buildin to service the future buildin to the east. The second
re chan is to use plastic pipe for the water services. With the new confi
the sewer and water services will be crossin to the east of the buildin A new set of
plans dated 8/14/01 were received on 8/15/01.
Runnin under the buildin is allowed under the State Plumbin Codes for private
utilities. These pipes will not be considered part of the Cit water s The are a
customer owned utilities that must be maintained b the owner. The water pipes as
connected to the Cit water distribution s will need to meet the plumbin code
para 4715.0510 Water Service Pipe. CPVC C900 is NOT allowed as water service
pipe.
Pipes under the buildin the must be constructed to the same standard as all plumbin
pipes within a buildin
The civil desi en has su an option to provide a casin around the pipes as
the cross under the buildin The casin is not re b code. The State Plumbin
Inspector stated that the casin was not re b code. The installation of a casin will
make future repair easier.
All places where the water pipe crosses the sewer pipe the sewer pipe shall be 18 inches
below the water pipe.
If this propert were ever to g o into separate ownership for the two buildin cross
easements between the properties will be re
The installation of the water and sewer service will re the inspections and testin as
specified in the attached "Commercial Water and Sewer Connection Inspections Form"
TREE CITY U.S.A.
CILYU1
Oak Park Heights
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14168 57 Street N.o Box 2007 ® Oak Park Heights, N 55082 le Phone (651) 439 -4439 * Fax 439 -0574
Commercial Water and Sewer Connection Inspections
To: Sewer and Water Contractors
From: Public Works Director, Jay Johnson, PE
Date: 08/15/01
Fie: Inspections of commercial Water and Seger connections
24 Hour Notification Required Contractors are required to contact the Public Works
Department for a water and sewer inspection appointments 24 hours prior to the time of the
inspections. Generally, appointments will be scheduled in the time periods of 10:00AM to
11:OOAM and 12:30 PM to 3:00 PM.
Connections to City water Mains: Public Works shall be provided notification 24
hours prior to any connection to the City Water Mains.
Wet Taps Wet taps to the C ity System will be witnessed by the Public Works Department
and subject to a separate inspection fee. The city side of the valves for the wet taps will be
chlorinated with a solution of 200 ppm chlorine prior to connection.
Water Service Inspection When arriving for the inspection the installer needs to be
present. The water service line needs to be exposed in a safe trench and terminated by a valve.
(Oak Park Heights employees cannot endanger their lives by entering an un -safe trench.
Trenches need to comply with Minnesota OSHA and Federal OSHA trenching safety rules.)
Disinfection Pipes of 2 inches or larger will be disinfected in accordance with American
Water Works Association Specification No. 0651. Following disinfection the pipes will be
flushed and tested for the presence of coliforrn bacteria using a Minnesota Department of
Health certified testing laboratory. gate valves added to the system will have the city side of
the valve disinfected with a solution of 200 ppm chlorine prior to installation on the system..
Pressure Testing: For water services with copper lines less than 2 inc hes in diameter, the
water will be turned on and the system pressurized to inspect for leaks. Lines of 2 inches in
diameter or larger will be subjected to a hydostatic pressure test of 150 pounds per square inch
for a period of 2 hours. A drop in pressure of 3 psi during any 30- minute period shall be cause
for failure of the project.
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TREE CITY T.S.A.
Oak Park Heights Pubw.; wor, ,)
Commercial water and Sewer Connections
Conductivity Testing: Conductivity testing for iron pipes will be made after p ressure
testing with pipe full of water at normal operating pressure. Test will include 350 Amps at 30
Volts for 4 minutes. Current will be measured continuously on an ammeter and shall remain
steady without interuption of excessive flucuation. After 4 minutes at 350 amps the currentl
shall be raised fo 400 amps for one minute without interuption or excessive flucuation..
Sewer Service Inspection: Sewer service lines will be inspected at the same time as the
water service line. The sewer service lines needs to be completed and exposed in a safe trench.
(Oak Park Heights employees cannot endanger their lives by entering an un -safe trench.
Trenches need to comply with Minnesota OSHA and Federal OSHA trenching safety rules.)
The inspector will inspect the line for slope, bedding, materials of construction, depth and
other building /plumbing code requirements.
Sewer Pressure Testing. Sewer lines in excess of 100 feet, or which has a potable water
line crossing (water line below sewer or less than 18 inches above sewer) or systems which
have manholes will be pressure tested with compressed air of 5 psi for 15 minutes. Air
pressure shall reamin constnat over the test period.
Manhole Inspections Each manhole will be inspected for proper installation and . r oat in
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If you have any questions please contact Mr. Jay E. Johnson, Public works Director or Mr. Jeff
Kellogg, Public works Foreman at 651-439-4439.
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TREE CITY U.S.A.