Plans • .
FLOOD PLAIN SURVEY . GILBERTSON JOB #92 -28
16920 GREENTREE AVE.
FOR ERNIE RIVAS JUNE 15, 1992 LAK9 OR
:
a' (503) 635 -7590
ELEVATION FOR 100 YR. FLOOD WAS DETERMINED TO BE 133.7 ENGINEERING
AS SCALED FROM THE 1978 "FIRM FOR TIGARD. BENCHMARK
WAS THE PAVEMENT AT CENTERLINE EAST END OF BONITA RD.
BRIDGE OVER FANNO CREEK. T1;E EXPECTED RAILROAD SPIKE
WAS GONE, SO WE HELD THE PAVE �MENT TO BE 137.23 FEET (NGVD). REGISTERED
( ; PROFESSIONAL
HUBS WERE SET AT LOCATIONS MARKED BY CI; ` LAND SURVEYOR
THE TOP OF EACH HUB IS AT 1333 (NGVD).
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Cor J; \ ro "la Approved 14-11—
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PERMIT IN a
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FLOOD SURVEY GILBERTSON JOB #92 -28
16920 GREENTREE AVE.
FOR ERNIE RIVAS JUNE 15, 1992 LAKE OSWEGO. OR
' 97034
(503) 635 -7590
ELEVATION FOR 100 YR. FLOOD WAS DETERMINED TO BE 133.7 ENGINEERING
AS SCALED FROM THE 1978 "FIRM" FOR TIGARD. BENCHMARK
WAS THE PAVEMENT AT CENTERLINE EAST END OF BONITA RD.
BRIDGE OVER FANNO CREEK. THE EXPECTED RAILROAD SPIKE
WAS GONE, SO WE HELD THE PAVEMENT TO BE 137.23 FEET (NGVD). REGBST
HUBS WERE SET AT LOCATIONS MARKED BY 0; ' P � SURVEYOR
THE TOP OF EACH HUB IS AT 133.7 (NGVD). pp/�
* .0 51 i, .cUli 64 s- /o 2 0 OREGON
JULY 15, 18e3
DOUG GILBERTSON
SCALE: 1"=50" - 2047
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1/2" IR
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g 11 14 P ..k -**. .0.ck !II
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=133.7
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