HomeMy WebLinkAboutInspectionsOHNSON, DERKOFLER & BEGS
1022 TWELFTH AVENUE SOUTH
Mr. Herold J. Cox, City Clerk
City of Meridian
Meridian, Idaho
Dear Mr. Cox:
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NAMPA, IDAHO, 83651
TELEPHONE 466-2323 OR 888-4460
SUMNER M. JOHNSON, P.E.
R. W. UNOERKOFL.ER, P.E.
WILLIAM W. BRIGGS, P.E.
September 10, 1965
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Subject:
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Subject: Inspection of Manholes in the East Side Park Subdivision
On August 31, 1965, the manholes and sewer lines as constructed by
the Crane Excavating Company for the Subdivision Owner were inspected, and the
condition of the system is as follows:
The surface of the floors in all the manholes was rough
and uneven. The drain channels through the floors of the man-
holes were also rough and uneven.
The rim of the manhole in East Fifth Street was not
crowned correctly, which will not blend with the finish surface
of the road.
Care was not taken by the spreading of surface gravel on
the streets in the subdivision, thereby allowing gravel and dirt
to enter the manholes.
The infiltration was measured at the East Side Park Lift
Station as approximately two gallons per minute.
It is impossible to pinpoint where the water is entering
the system since each manhole indicated running or standing
water. This ground water infiltration is entering the lines
through the joints or at the ends of the two stub lines, which
are supposed to be plugged.
The grade of the lines was not checked by field surveys
but appeared to be unsatisfactory. Standing water in the
manhole in Carlton Avenue would indicate a high or low spot
in the sewer line, or possibly an obstruction in the line.
To remedy the above conditions, the floors and drain channels through
OFFICE ALSO AT 6211/2 MAIN STREET, BOISE, IDAHO, 83702 - TELEPHONE 344-0240
=JOHNSON, UNDERYoFIER & BRIGGS - eons.ufEfn9 fnginsszs— 1022 TWELFTH AVENUE SOUTH — NAMPA, IDAHO, 83651
Mr. Herold J. Cox, City Clerk
September 10, 1965
Page 2
the manholes need to be refinished. The infiltration should also be located as
to where it enters the system and then necessary procedures taken to seal the
pipe or joints so as to prevent further infiltrations. Also "lamp testing",
field levels, cleaning, or whatever other action is necessary needs to be done
to correct the apparent flow line discrepancy.
If you have any further questions, or if we can be of further
assistance, please do not hesitate to contact us.
Very truly yours,
JOHNSON, UNDERKOFLER & BRIGGS
Harold J. Cox,,,. E.
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