HomeMy WebLinkAboutC2.50_Details ACHD Drainage Details Sheet Notes: gh" ��_„
1. IF GROUNDWATER IS ENCOUNTERED THEN THE CONTRACTOR SHALL r� AWW_ 4- THE
NOTIFY THE ENGINEER AS SOON AS POSSIBLE FOR REDESIGN OF LAN D
DRAINAGE FACILITY TO PROVIDE 3'MIN. CLEARANCE BETWEEN .
GROUNDWATER AND THE BOTTOM OF THE FACILITY. UNTIMELY GROUP
NOTIFICATION OF THE ENGINEER MAY RESULT IN ADDITIONAL COSTS TO
SAND/GREASE TRAP (ISPWC SD-624) OR THE CONTRACTOR.
SEDIMENT MANHOLE (ISPWC SD-61 1) 2. BOTTOM OF SAND LAYER ELEVATION IS THE MINIMUM EXCAVATION.
18" DIA. CORRUGATED HDPE IF INSTALLED WITH CHAMBERS/ FINISH GRADE
2' RING & OR PVC PIPE PERFORATED PER CHIPS, INSTALL WOVEN
COVER PER PERFORATION SCHEDULE GEOTEXTILE TO SEPARATE CHIPS
ISPWC SD-617 AND DRAIN ROCK -
(TYP) TREES & SHRUBS 00 -III III=III=III Q. Groundwater Note:
ARE NOT PERMITTED -I = I-III-III-II
OBSERVATION
ON TOP OF SEEPAGE WELL -III=III=III III-=III- : _ _ e _ - ._• ._
BED IIIIIIIIIIIIII IIIIIIIIIIII > 1. GROUND WATER DATA FOR THIS SITE IS BASED UPON SITE CONSULTING,
1=III=11 III=III- E LLC. GEOTECHNICAL REPORT FILE NO 21831-A, DATED SEPTEMBER 10,
III=III 1 1=I 3 co
ELEV BOTTOM PERF <= EE COVER
ELEV BOTTOM BAFFLE NOTES 2021. GROUND WATER IS ESTIMATED TO BE BELOW 50-FT FROM
EXISTING GROUND.
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
SEE 5 0 0 0 0 ° ° STD o o o o o o 0 0 \\/\\i\\�
NOTE 11 0% SLOPE 0% SLOPE \j\\NATIVE\\/�\ s 3
\�\� soli \\�\� PLAN CONCRETE COLLAR
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/\\i \DNA IVE / \\\ \\ 2" WASHED VARIES-SEE 2" WASHED \\ \ <
\�\�� SOIL \\%\\%/\\ \% DRAIN ROCK PLAN SHEETS DRAIN ROCK
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Li INLET/OUTLET PIPE SEE PLANS FOR PIPE
5' OF 18" SOLID CONFIGURATION SIZES AND REQUIREMENTS (TYP.)
ASTM C33 ASTM C33
WALL PIPE WITH 1.5-FT
:.FILTER SAND.:; . FILTER SAND'' o > � 18"
0
4" OF J" PIPE BEDDING ::.:_..,-; ..,. ... ,. ,• .; . ... ... .. - 3-FT m
NONWOVEN FILTER FABRIC. OVERLAP TRANSITION 5-FT IN� _MAX HSG>
ELEVATION
MINIMUM OF 1-FT TOP AND BED NON-PERFORATED
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SIDES ONLY TO PERFORATED PIPE -11
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SECTION X a ill it 3
NOTES: N.T.S. w -" ACHD Sand & Grease Trap Schedule - 1000-gal
1. BMP 1-4 OR VEGETATED PRETREATMENT IS REQUIRED. s SECTION CONCRETE COLLAR SG ELEV ELEV ELEV ELEV BAFFLE Owq
2. CONTACT DESIGN PROFESSIONAL FOR SEEPAGE BED REDESIGN IF GROUNDWATER IS ENCOUNTERED ABOVE Q
MAX HSGW ELEVATION ° ° N.T.S. PLAN No GALLONS „A„ "B" "C" "D" SPACING (CFS)
3. ALL VAULTS, MANHOLES, & SAND AND GREASE TRAPS SHALL BE HS25 OR GREATER LOAD RATED =
4. SEEPAGE BED SHALL BE SHOWN ON BOTH PLAN AND PROFILE VIEWS o o 4 4 1000-GAL 2663.95 2663.85 2663.35 2663.10 20" 3.10
5. OPTIONAL CHAMBERS PER MANUFACTURERS SPECIFICATIONS w 12" MAXIMUM GRADE RINGS. IF GREATER THAN 12"
6. ALL GEOTEXTILE SEAMS SHALL OVERLAP 1 FOOT MINIMUM IS REQUIRED USE MANHOLE CONE SECTIONS. 5 1000-GAL 2662.24 2662.14 2661.64 2661.39 20" 2.69
7. EL. IN >= EL. BOTTOM PERFORATIONS IN 18" PERF PIPE o o 8. MAXIMUM BED LENGTH IS 400-FT BETWEEN MANHOLES RIM: (E) 9" MIN. 6 1000-GAL 2660.93 2660.83 2660.33 2660.08 20" 0.92 W
9. BED WIDTH SHALL REMAIN CONSTANT , 9 FINISH GRADE VARIES 7a 1000-GAL 2662.03 2661.93 2661.43 2661.17 20 1.21
10. WATERTIGHT CONNECTION REQUIRED
11. HIGH FLOW BYPASS PIPE ONLY NEEDED IF Q100 VELOCITY THROUGH STRUCTURE > 0.5 FPS °
TOP: (F)
COVER NOTES: ° ° 14
FOR SEEPAGE BEDS OUTSIDE PUBLIC RIGHT-OF-WAY: " (C) (B)
1. A MINIMUM 1.5-FT COVER FROM TOP OF BED TO FINISH GRADE IS REQUIRED
INV-IN:(A) INV-OUT: D RECORD DRAWING REQUIREMENTS:
.
FOR SEEPAGE BEDS IN PUBLIC RIGHT-OF-WAY: ° ° ( ) CONTRACTOR IS REQUIRED TO PROVIDE AS-BUILT ELEVATIONS FOR ALL SAND&GREASE TRAPS AT DESIGN
1. A MINIMUM 1.0-FT COVER FROM TOP OF BED TO PAVEMENT SUBGRADE IS REQUIRED R° VARIES POINTS (ELEV"A"TO "D") AS LISTED ABOVE, OR CONTACT THE PROJECT SURVEYOR TO DOCUMENT AS-BUILT
--BACKFILL OVER BED TO SUBGRADE WITH 6"-8" MINUS PITRUN ELEVATIONS BEFORE SETTING THE LID OF THE SAND AND GREASE TRAP.
--WOVEN GEOTEXTILE FABRIC REQUIRED OVER TOP OF BED
--TOP OF BED UNDER SIDEWALK SHALL BE MIN 1.0-FT BELOW PAVEMENT SUBGRADE SECTION SAND AND GREASE TRAP
2. IF < 1.0-FT COVER FROM TOP OF BED TO SUBGRADE, ANGULAR J" TO 2" ROCK IS REQUIRED WITH (PER ACHD SO BMP-01) PROVIDE THE AS BUILT ELEVATIONS TO THE PROJECT ENGINEER FOR USE IN PREPARING THE PROJECT RECORD O
MINIMUM 50% SINGLE FRACTURED FACE IN PLACE OF 2" DRAIN ROCK. N.T.S. DRAWINGS.
3. FULL ROADWAY SECTION IS REQUIRED OVER SEEPAGE BEDS. SEEPAGE BEDS SHALL NOT EXTEND ABOVE
SUBGRADE O
4. THE DESIGN PROFESSIONAL IS SOLELY RESPONSIBLE FOR ASSESSING THE BEARING RESISTANCE OF THE 1000 Gallon Sand & Grease Trap Details
SUBGRADE SOILS AND DETERMINING THE DEPTH OF FOUNDATION STONE 3 SEE BMP 20 SHEET 2 OF 3 FOR ADDITIONAL NOTES Scale: NTS CD
2017 ACHD REVISION L
2017 SEEPAGE BED WITH STANDARD DRAWING IDAHO STANDARDS
ACHD S ORMWDESIGN FOR PUBLIC WORKS GROUNDWATER O U N D WAT E R
STANDARD DRAWING
GUIDELINES OPTIONAL CHAMBERS 2O Q
SHEET 1 OF 3 CONSTRUCTION ACHD SUPPLEMENT OBSERVATION WELL S D - 6 2 7
LEGEND INLET/OUTLET PIPE SEE PLANS FOR PIPE CD
ACHD Seepage Bed Schedule: z 2 WELL COVER,
8 DIA.
WATERTIGHT
BOLT
DOWN
OVER AND CANISTER CONFIGURATION SIZES AND REQUIREMENTS (TYP.)
OR 3 BOLT LID WITH 1 " HEAD AND SAE THREADS, KETED 0
0 CONCRETE (COLLAR), CLASS 3000 (ISPWC SECTION 703)
BED DRAINAGE RIM TOP OF BOTTOM BOTTOM V100 OO 3/8" DIA HOLES OR SLOTS CUT INTO PIPE AT 3" ON CENTER c z
INLET IN LENGTH WIDTH DEPTH 0 TRACER WIRE SHALL BE PLACED ON OUTSIDE OF PVC PIPE, MINIMUM 18 GAUGE, INSULATED, SINGLE- O Q
NO. AREA ELEV ROCK OF ROCK OF SAND (cf = o
) CONDUCTOR COPPER WIRE, INSULATION COLOR SHALL BE GREEN WITH THREE 6" DIAMETER COILS �
0 PIPE SHALL BE PERFORATED PVC, ASTM D-3035, SDR 35. WELLS BACKFILLED IN A PIT REQUIRE 6" 0 0 AHD n r Tr Schedule - 1 - I y �■■� w
1 2.94 AC SG 1 2664.62 2662.71 2652.71 2651.21 106-FT 15-FT 10 FT 6358 C Sand & Grease Trap Sc edu a 500 ga
PIPE. DRILLED WELLS MAY USE 4" PIPE
2 2.45 AC SG 2 2663.30 2660.96 2651.96 2650.46 120-FT 12-FT 9-FT 5302 0' NONWOVEN FILTER FABRIC AROUND OPENINGS AND BOTTOM, FABRIC OVER CHIPS/DRAIN ROCK
OO 3 2.85 AC SG 3 2663.20 2661.26 2651.26 2649.76 118-FT 13-FT 10-FT 6157 POLYPROPYLENE FIBER REINFORCEMENT AT 1 1/2 LBS/CY SG ELEV ELEV ELEV ELEV BAFFLE Owq
O BACKFILL MATERIAL TO MATCH STORAGE MEDIA FOR OBSERVATION WELLS LOCATED WITHIN A BMP FACILITY. GALLONS Revisions
4 2.40 AC SG 4 2667.86 2665.10 2655.10 2653.60 129-FT 10-FT 10-FT 5183 USE PIPE BEDDING CHIPS FOR OBSERVATION WELLS LOCATED OUTSIDE BMP FACILITIES PLAN No. "A" "B" "C" "D" SPACING (CFS)
1. AGENCY COMMENTS 07-28-25
5 2.09 AC SG 5 2666.18 2663.50 2653.50 2652.00 112-FT 10-FT 10-FT 4504 1 1500-GAL 2661.53 2661.43 2659.93 2660.68 20" 3.80
NOTES: 12" MAXIMUM GRADE RINGS. IF GREATER THAN 12"
6 0.72 AC SG 6 2664.14 2662.11 2654.61 2653.11 61-FT 8-FT 7.5-FT 1545 1. GROUNDWATER OBSERVATION WELLS ARE FOR MEASUREMENT OF GROUNDWATER LEVELS WITHIN OR NEAR IS REQUIRED USE MANHOLE CONE SECTIONS. 2 1500-GAL 2659.78 2659.68 2659.18 2658.93 20" 3.17
7 4.51 AC SBMH 05 2665.57 2662.70 2652.70 2651.20 162-FT 15-FT 10-FT 9749 STORM DRAINAGE FACILITIES RIM: E 3 1500-GAL 2660.07 2659.97 2659.47 2659.22 20" 3.68
2. THIS DETAIL IS FOR WELLS INSTALLED BY DRILLING OR BY EXCAVATED PITS ( ) 9" MIN.
8 3.26 AC SG 8 2660.06 2658.29 2648.29 2646.79 117-FT 15-FT 10-FT 7042 3. LOCATION OF GROUNDWATER OBSERVATION WELLS SHALL BE APPROVED BY ACHD FINISH GRADE VARIES 7 1500-GAL 2662.02 2661.92 2661.42 2661.17 20" 4.16
4. OBSERVATION WELLS NOT ALLOWED IN CURB OR VALLEY GUTTER SECTION
TOP: (F) 9 1500-GAL 2657.11 2657.01 2656.51 2656.26 2111 4.21
NOTES: " (C) (B)
1. INSTALL ELECTRONIC MARKERS ON EACH CORNER OF THE FACILITY. COORDINATE WITH ACHD INSPECTION FOR RECORD DRAWING REQUIREMENTS:
PLACEMENT OF THE MARKERS DURING CONSTRUCTION PRIOR TO BACKFILLING.THE LOCATORS ARE TO BE INV.-IN:(A) INV-OUT: (D) CONTRACTOR IS REQUIRED TO PROVIDE AS-BUILT ELEVATIONS FOR ALL SAND&GREASE TRAPS AT DESIGN
SUPPLIED BY ACHD AND ARE$25 EACH; TO BE PAID FOR PRIOR TO PLAN APPROVAL. VARIES POINTS (ELEV"A"TO "D") AS LISTED ABOVE, OR CONTACT THE PROJECT SURVEYOR TO DOCUMENT AS-BUILT
ELEVATIONS BEFORE SETTING THE LID OF THE SAND AND GREASE TRAP.
2. ACHD STAFF MUST VERIFY THE INFILTRATION RATE AFTER THE FACILITY IS FULLY EXCAVATED. DESIGN RATE IS
6-IN PER HOUR. SAND AND GREASE TRAP PROVIDE THE AS-BUILT ELEVATIONS TO THE PROJECT ENGINEER FOR USE IN PREPARING THE PROJECT RECORD
(PER ACHD SO BMP-01) DRAWINGS.
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ACHD Seepage Bed Detail 2 Groundwater Observation Well Detail 4 1500 Gallon Sand & Grease Trap Details �G\STF
1 Scale: NTS Scale: NTS Scale: NTS
10961
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4s0N DE'S
0-7128/ZD25
Project No.: 121172
Date of Issuance: 07-28-2025
Project Milestone: PERMIT SUBMITTAL
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Details
ACHD Drainage Details
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