HomeMy WebLinkAboutC4.11_Grading and Drainage Q O U
MENEM M N
Oct
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FINISH GRADE a MONITOR WELL LOCATIONS �= Z
II RXII=1II II PRIVATE SEEPAGE TRENCHES, TYPICAL LOCATION y Z
I II 5' FROM END OF BED & 20' PAST END OF BED Z
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L 11 1 = a
3 WELL COVER IN SIDEWALK _ o
LEGEND: N
!-. �I 1. WELL COVER, 8" DIAM. WATERTIGHT GALVANIZED STEEL COVER AND CANISTER. = Z w
c� 18 2. PVC CAP, GASKETED (WATERTIGHT). W
3. CONCRETE (COLLAR), CLASS 3000 (ISPWC SECTION 703). Lu U'
CLEANOUT LIDS TO BE FLUSH TOP OF w 5 g' 4. 2" DIAMETER PVC PIPE SCHEDULE 40 WITH SLOTS W w
WITH ASPHALT. SEE RIM INV. IN. INV. OUT C9 Z w
ELEVATIONS IN PLAN VIEW DESCRIPTION BAFFLE Q 5. TRACER WIRE SHALL BE A MINIMUM OF 18 GAUGE, INSULATED, SINGLE-CONDUCTOR � _
SHEETS 4.2-4.5 Z � co COPPER WIRE, INSULATION COLOR SHALL BE GREEN WITH THREE 6" DIAMETER COILS. '�
S&G TRAP #1 2675.60 2675.50 2675.00 6. FOR WELLS BACKFILLED IN A PIT REQUIRE 6" PERFORATED PVC PIPE CASING, ASTM Z � M
PROVIDE GRADE RINGS o D-3035, SDR 35 WITH 6 EA- 3/8" DIA HOLES AT 3" ON CENTER. DRILLED WELLS W a 00
S&G TRAP #2 2676.78 2676.68 2676.18 4 MAY HAVE A 4" PIPE CASING. ~
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AS NEEDED 12" MAX o 7. PVC CAP, SOLVENT WELDED OR GASKETED (WATERTIGHT) w J
S&G TRAP #3 2676.27 2676.17 2675.67 `�'_ 3 8. (2) #4 REBAR HOOPS WITH 4" VERTICALS w
STRUCTURE TO
o`` PLAN VIEW 9. FILTER SAND (ISPWC SECTION 801) OR ASTM C33 FILTER SAND
HAVE HS 25 TRAFFIC -TOP S&G TRAP #4 2677.50 2677.40 2676.90 m z CONCRETE COLLAR NON-TRAFFIC AREAS NOTES:
RATED TOP. OF STRUCTURE o a 6
TOP OF BY PRECAST SUPPLY r-N A. WELLS ARE FOR OBSERVATION OF GROUNDWATER LEVEL NEAR STORM DRAINAGE
BAFFLE S&G TRAP #5 2677.70 2677.60 2677.10 0 3 NAL
FACILITIES. \0 F
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B. THIS DETAIL IS FOR WELLS DRILLED IN UNDISTURBED SOIL AND EXCAVATED PITS. SS NG
S&G TRAP #6 N/A 2676.00 2675.50 o m C. LOCATION OF GROUNDWATER OBSERVATION WELLS SHALL BE PER PLAN OR AS o�� �C,\STFR�
i APPROVED BY DESIGN ENGINEER. Q p
m- ° ° �n caP D. PORTION OF PIPE LYING IN DRAINAGE SAND MUST BE WRAPPED IN A DRAINAGE 10/16/2023
20" S&G TRAP #7 2675.27 2675.17 2674.67 N 0 0 LLJ TEXTILE, TYPE I PER ISPWC SECTION 2050.2.1.A. 17882
0 0 g - E. OBSERVATION WELLS TO EXTEND A MINIMUM OF 1' BELOW THE BOTTOM SAND OF THE U,
X'�' BOTTOM '�'� TABLE OF SAND AND GREASE > co 0 0 SEEPAGE BEDS. 9�OF BAFFLE ti TRAP DIMENSIONS "' o o PLAN VIEW 3 �F�F OF
w ° ° CONCRETE COLLAR TRAFFIC AREAS �N S. C�
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° ° �15V TO 18" CHECKED BY:
TYPICAL 1000 GALLON ORIENTATION VARIES. 0 0 0 0
SAND/GREASE TRAP SEE PLAN VIEW, 0 0 0 DAVID A. BAILEY P.E.
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PRIVATE(PER ISPWC SD-62:i) SHEETS 4.2-4.5. f o o
DRAWN BY:
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SECTION
WELL SECTION CONCRETE COLLAR
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18" MIN
OVERLAP
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-I III III III- III III III I- 10DRAINAGE CONTRACTOR SHALL INSTALL CONDUITS THROUGH THE SEEPAGE TRENCHES FOR WATER
i1I11I11I11 O LINES, UNDERGROUND POWER LINES, GAS LINES AND TELEPHONE LINES. I ' I
2. NO GROUNDWATER WAS ENCOUNTERED IN TEST EXCAVATIONS ON THIS SITE. IF GROUNDWATER IS W
ENCOUNTERED HIGHER THAN INDICATED ON THE PLANS, THE CONTRACTOR SHALL NOTIFY THE ENGINEER
,,,--12" 0 PERFORATED PIPE ADS N-12 ® 0.25%* IMMEDIATELY FOR REDESIGN OF SEEPAGE TRENCHES TO PROVIDE 3' MINIMUM CLEARANCE BETWEEN Q
m �-FREE DRAINING GROUNDWATER AND THE BOTTOM OF THE TRENCH. UNTIMELY NOTIFICATION OF THE ENGINEER MAY
MIN. 1'- 0" OVERLAP MATERIALS RESULT IN ADDITIONAL COSTS TO THE CONTRACTOR.
WRAP TRENCHES TOP AND
hr
2' (TYP) OF GEOTEXTILE SIDES WITH 4 OZ/SY � o o (PERC > 8"/ ) REFER TO GEOTECHNICAL REPORT PREPARED BY ALLWEST, DATED MARCH 25, 2022.
MIN. 5 LF 12" ADS N-12 GEOTEXTILE (NONWOVEN) SEE FIGURE-N PG. 3-42
(NON-PERFORATED) O o 0 COO 1,09 co 0 o BOISE STORMWATER DESIGN MANUAL I
8 008 3. ALL MONITOR WELLS SHALL HAVE A CONCRETE APRON POURED AROUND THE CAP. W
TO SEEPAGE BED o o 0 o o 0
TRENCH SIDE
4. PERCOLATION RATE FOR SEEPAGE TRENCHES 8" PER. HOUR r
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NOTE: 18" 1 1/2" WASHED 5. IF ROCK IS ENCOUNTERED CONTRACTOR TO HAVE PERCOLATION TEST PERFORMED BY SOILS ENGINEER j
DEFLECTION OF THE PERFORATED PIPE MAY BE MAX. 165' DRAIN ROCK 18" ASTM C-33 AFTER SEEPAGE TRENCH IS FULLY EXCAVATED. IF THE PERCOLATION IS LESS THAN SPECIFIED BY THE
RADIUS, PER MANUFACTURER DATA. FILTER SAND SOILS REPORT AND ENGINEER, CONTRACTOR WILL NEED TO BLAST TO CREATE CRACKS IN ROCK FOR
DRAINAGE TO OCCUR OR REDESIGN THE SYSTEM TO ACHIEVE THE REQUIRED CRITERIA. w
SECTION VIEW 6. QUALIFIED GEOTECHNICAL ENGINEER OR PROJECT ENGINEER TO BE ON-SITE DURING EXCAVATION. z
PRIVATE TRENCH DETAILED RECORD OF BED DIMENSIONS AND PROOF OF EXCAVATION TO FREE-DRAINING MUST BE
MONITOR WELL PROVIDED TO PROJECT ENGINEER AT PROJECT COMPLETION.
PER DETAIL THIS SHEET NOT TO SCALE
w� 5' TYP 20 TYP U W
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DRAIN ROCK MAY BE OVER PIPE 0 0 Q o
1'-0" MIN. COVER OVER DRAIN ROCK c\, "Boo SIC"
TOP BOTTOM BOTTOM
0 0 0o SLOPE = 0.25%
DESCRIPTION LENGTH WIDTH DEPTH STORAGE STORAGE OF SAND
s o co o o WRAP PIPE END W/ PRIVATE SEEPAGE TRENCH #1 67' 7.0' 8.0' 2677.00 2669.00 2667.50
DOUBLE LAYER FILTER ��(
o c�o FABRIC AND BIND IN 0�
1 1/2" WASHED DRAIN ROCK PLACE 0 PRIVATE SEEPAGE TRENCH #2 60' 7.5' 8.0' 2678.18 2670.18 2668.68
PRIVATE SEEPAGE TRENCH #3 105' 8.0' 8.0' 2677.66 2669.66 2668.16
0 o PRIVATE SEEPAGE TRENCH #4 80' 10.0' 8.0' 2678.90 2670.90 2669.40
WRAP TRENCHES TOP AND SIDES WITH 4 OZ/SY c��
GEOTEXTILE (NONWOVEN) o ;000 PRIVATE SEEPAGE TRENCH #5 42' 7.0' 8.0' 2679.10 2671.10 2669.60 I , I
PRIVATE SEEPAGE TRENCH #6 50' 8.0' 8.0' 2677.50 2669.50 2668.00 W
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?o PRIVATE SEEPAGE TRENCH #7 37' 8.0' 8.0' 2676.67 2668.67 2667.17 W
EXCAVATE TO FREE DRAININGLLJ
SANDS AND GRAVEL (TYP) cn J z TABLE OF PRIVATE SEEPAGE TRENCH DIMENSIONS
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1'-0" MIN. 1'-0" MIN.
NOTE: BELOW SAND BELOW SAND V)
NO GROUNDWATER IS ANTICIPATED IN SITE EXCAVATION. MONITOR WELL MONITOR WELL
FOOT PLATE FOOT PLATE DATE:
CONTRACTOR SHALL NOTIFY ENGINEER IMMEDIATELY IF
10-13-2023
GROUNDWATER IS ENCOUNTERED WITHIN 3 FEET OF THE BOTTOM SEEPAGE TRENCH PROJECT:
T:
NOT TO SCALE
OF DESIGN ELEVATION FOR ANY INFILTRATION FACILITY. SEASONAL HIGH GW P 021-
SHEET