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(NOTE PLAN VIEW ORIENTATION CHANGE) I.E. 403.40 W I.E. 422
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NOTE LEGEND
1. (INDICATES GENERAL CONSTRUCTION NOTE)
DRAINAGE NOTES (INDICATES SPECIFIC CONSTRUCTION KEYNOTE)
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O
O
1.
SUBSURFACE DRAINAGE AND SITE STORMWATER INFRASTRUCTURE SHALL BE PRESERVED AND
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PROTECTED EXCEPT AS SPECIFICALLY AND EXPLICITLY DIRECTED BY THE ENGINEER. ALL EXISTING SYSTEM
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COMPONENTS ARE SCHEDULED FOR RE -USE.
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2.
FIELD SUBSURFACE DRAINAGE FINISH WORK MAY NOT BE PERFORMED PRIOR TO THE APPROVAL OF THE
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FIELD SUBGRADE ESTABLISHMENT.
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FOLLOWING MASS EXCAVATION OF THE EXISTING OVER -BURDEN OF ROOT ZONE SANDS AND
AGGREGATES AND APPROVAL OF THE SUBGRADE, LOCATE AND MARK WITH LATH AND FLAGGING EACH
INDIVIDUAL FIELD SUBSURFACE DRAINAGE LATERAL AND REMOVE EXISTING DRAINAGE BACKFILL
AGGREGATE SUFFICIENTLY TO INSPECT THE PIPE TO THE SPRINGLINE. PROTECT AND MAINTAIN TRENCH
✓ 1
WALLS.
o� 1
I \ 4.
SURPLUS EXCAVATED SOIL AND AGGREGATE MATERIALS SHALL BE REMOVED FROM THE FIELD
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SUBGRADE PRIOR TO COMMENCING ON THE NEXT ADJACENT TRENCH. EXCAVATED MATERIAL MAY NOT
00
`
REMAIN ON SUBGRADE.
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O
5.
PROVIDE A SMOOTH, EVEN SUBGRADE AFTER REMOVAL OF THE TRENCH MATERIAL. SUBGRADE TO BE
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COMPACTED TO 95%. LEAVE NO LOOSE MATERIAL ON THE SUBGRADE. SUBGRADE STRUCTURAL SOIL
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FABRIC PLACEMENT TO BE COORDINATED WITH THE COMPLETION OF DRAINAGE TRENCH CLEAN-UP,
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PLACEMENT OF TRENCH WALL FABRIC, AND BACKFILL WITH CLEAN, APPROVED DRAINAGE AGGREGATE.
N
O
WHERE DIRECTED, REMOVE EXISTING FIELD SUBSURFACE DRAINAGE LATERAL AND REPLACE WITH NEW
AS FOLLOWS;
A. EXCAVATION BELOW INVERT GRADE MUST BE ESTABLISHED TO A DEPTH SO AS TO PROVIDE FOR
\
SPECIFIED PLACEMENT OF PEA GRAVEL BEDDING AT BOTTOM OF PIPE ELEVATION PRIOR TO LAYING
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\
THE PERFORATED PIPE.
\ \
B. CONNECTION OF LATERALS TO COLLECTOR DRAINS SHALL BE MADE WITH A COMBINATION REDUCING
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TEE AND REDUCING SADDLE TEE.
C. NO FOREIGN MATERIAL WILL BE PERMITTED INSIDE, ALONGSIDE, UNDER, OR ON TOP OF THE
PERFORATED DRAIN PIPE.
D. THE BACKFILL FOR ALL PERFORATED PIPE SHALL BE CLEAN WASHED PEA GRAVEL. REFER TO THE
\
SPECIFICATIONS FOR THE GRADATION REQUIREMENTS.
\
E. ALL TRENCHES TO HAVE BACKFILL MATERIAL "CROWNED" A MINIMUM OF 2" ABOVE SUBGRADE TO
PROTECT FROM FOREIGN MATERIAL AND PROVIDE FOR EASE OF LOCATION IDENTIFICATION.
CROWNS WITH FOREIGN MATERIAL CONTAMINATION SHALL BE REMOVED PRIOR TO PLACEMENT OF
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BASE AGGREGATE.
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F. DURING PLACEMENT OF SPECIFIED TRENCH BACKFILL, PIPE MUST BE HELD IN PLACE TO PREVENT
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DISPLACEMENT AND PROVIDE FOR ACHIEVING SPECIFIED INVERT ELEVATION. DO NOT DAMAGE PIPE
OR ALLOW PIPE TO BE DISPLACED BY PLACEMENT OF BACKFILL MATERIAL.
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7.
CAP THE ENDS OF ALL LATERAL RUNS WHERE THE PIPE END IS EXPOSED. ALL OPEN ENDS DURING
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CONSTRUCTION ARE TO BE TEMPORARILY CAPPED OR PLUGGED.
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TRUCKS OR EQUIPMENT WILL BE ALLOWED TO DRIVE OVER THE TOP OF THE TRENCHES EXCEPT
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TRACK -EQUIPPED MACHINERY UTILIZED IN SPREADING BASE AGGREGATE MATERIALS. BACKFILLED
,
TRENCHES ARE TO BE STAKED AND FLAGGED 3' ABOVE GRADE AT MAXIMUM 30' SPACING.
1 '
412.57 (EX)
/
12.50
}�6�ti / J 3 7 / I s �� \\ °O\\ \ \gyp J\\ CIS \\ \ \\ \ \\ \\\ \\ �/ I II I I I I I I \ 415 67 /41 / ° I 412.51(EX)
S\ \ S \ \ c`\ \ q 4 47 412.57 (EX)
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TW 430.66<�\\
I BW 430.47 I [� O.\\ n�\\ s\\
\ � / I I I �n �\ \ �\� \ < ' \\ Vs\\ \ �\ \� \\\ �� �\\ I I I I I I I I 1 418.68 \ I 4 0
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DRAINAGE LEGEND
E END CAP
EXISTING 6" PERF. CORR. POLY DRAIN TUBING
EXISTING 6" OR 8" CPEP DRAIN COLLECTOR
o CLEANOUT
FLOW DIRECTION
IE 414.30 INVERT ELEVATION
\ / �I / II I /\ \ /J / ��\\ \\ \ \ \\\ \ \ \\ \\ I /\ I \ I I I 1 \ \ \ \ 415.4� \ \ CIE 413.00 COLLECTOR INVERT ELEVATION
°�\ \N \ \\ \\ \ \� \ j °�\�� I I I \ I I I 114 8.� N \ I I
SS I Iph j I I ❑ I I I II I O 4\ .� 8
� EXISTING CATCH BASIN
C'\\ 4�5.67
IT I
C\ \ \\\\ \\ II II 421.7 HAND EXCAVATE EXISTING DRAINAGE
' \\S\\>7.79' TW 430.39
BW 430.39 4, 2 Ia II I 4\I \ 42 2 \ 7\\
\ \\\ \\\\ \ \1 / C \
TRENCHES FOR EXISTING DRAINAGE PIPE
47
42 0'I /��8.03�\ 2$.4� INSPECTION, REPAIR, AND DRAINAGE421.7O /428.62 AGGREGATE REPLACEMENT42� . 9 0
0.0\ \ \ \ \
430.5 X j\\J \\ 430.75 (EX)
430.0 430.72 (E) 0 >\ y125. 7
y�. / I\ \ / °\� �o I 28.08 I I Cq
430.58 4
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429°� Q --0 . o- _ \ = - - 28-09 IN COMPLIANCE WITH CITY OF RENTON STANDARDS
42B 5 .06 1. o _ \
429.54' 0.7% B d � 428. 0 .02 p \00 \ 1 \ \ \ \ \
�8. 2 d PB 42 �2 p \ \ \ \ \� \ \ \ \ \ DEVELOPMENT ENGINEERING
0.1 (EX) 430.41 (EX) \
428. 6' 9.49' 428.66 (EX) d r \ \ \ \firiFIS
29.3 ° 12?, � / I 430.22 (€X) �430.45 (EX) \ 429.52 EX \ - \\ \ ��S \ \ \\ \ \ \ _\ �\ HBray 06/24/2025
a 0 429.78 X) ( ) _ -
I427.95(EX)�\ 427.80
NORTH
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H OGAN
D.A. Hogan &Associates, inc. '�oFG�STER w
1450 114th Ave. SE, Suite 225 SIGNAL
Bellevue, WA 98004 206-285-0400
CIVIL CONSTRUCTION PERMIT
2/21/25
SURVEYED:
SCALE:
�I »
I -LO>
wffnCAL- NAw lase
HORIZONTAL- NAD 1983/1991
\ATU M
. CITY OF
RENTON
Planning/Building/Public Works Dept.
LINDBERGH HIGH SCHOOL
FIELD IMPROVEMENTS
SOFTBALL DRAINAGE PLAN
DATE:
21 FEB 2025
CIVIL CONSTRUCTION PERMIT
4 14 25
DESIGNED:
EJG
CIVIL CONSTRUCTION PERMIT RESUBMITTAL
6/4/25
FlELDBOOK:
PAGE:
DRAWN:
LRB
ONE INCH
DRAWING NO:
F1 I 31
I
CHECKED: EJG
AT FULL SCALE
SIIF NOT ONE INCH
ACCORDINGLY
SCALESHEET:
NO.
REVISION
BY
DATE
APPR
APPROVED:
27 OF,
42
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