design notes: drainageway outflow...dec 17, 2019 · drain forebay forebay edge boulder, typ. grout...
TRANSCRIPT
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MAINTENANCE ROAD
SEE GENERAL DETAILS
OUTLET STRUCTURE
SEE OUTLET STRUCTURE DETAILS
TRICKLE CHANNEL
SEE GENERAL DETAILS
FOREBAY
SEE FOREBAY DETAILS
FOREBAY
SEE FOREBAY DETAILS
MAINTENANCE ROAD,
SEE GENERAL DETAILS
EMERGENCY SPILLWAY
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0
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0
6
3
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4
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2
6
0
5
9
6
4
5
7
6
5
100-YR WS
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6
6
7
6
8
6
9
5
7
7
0
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59
6
5
70
5
7
56
5
8
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0
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1
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2
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1
EURV WS
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5
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WQ WS
IN
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EXTENDED DETENTIONBASIN 1 OF 1
EXAMPLE PLAN
DESIGN NOTES:1. IT IS THE RESPONSIBILITY OF THE DESIGN ENGINEER TO SIZE, DESIGN AND DETAIL ALL
EDB STRUCTURES, INCLUDING REINFORCING STEEL GRATING, ORIFICE PLATE, WELLSCREEN, HINGED OPENING FOR ACCESS AND ALL METAL WORK CONNECTIONS.
2. A STANDARD EDB MAY BE USED FOR SITES WITH A TRIBUTARY AREA OF 5 ACRES UP TO 1SQUARE MILE.
3. EDB MAY PROVIDE WQCV AND FULL-SPECTRUM DETENTION (EURV AND 100-YEAR) IN ASINGLE FACILITY, OR THESE MAY BE SPLIT BETWEEN SEPARATE FACILITIES.
4. ACCESS IS REQUIRED TO FOREBAY, OUTLET AND SPILLWAY. SEE MAINTENANCE ACCESS ONTHE GENERAL DETAILS SHEET.
5. FOREBAY, TRICKLE CHANNEL AND MICROPOOL MUST ALL BE CONCRETE (NOT VEGETATEDOR SOFT BOTTOMED).
6. THE MINIMUM TRICKLE CHANNEL LONGITUDINAL SLOPE IS 0.5%.
7. THE DISTANCE BETWEEN THE INLET(S) AND OUTLET SHALL BE MAXIMIZED TO MINIMIZESHORT CIRCUITING. THE BASIN LENGTH (MEASURED ALONG THE FLOW PATH FROM THEINLET TO THE OUTLET) TO WIDTH RATIO SHOULD BE A MINIMUM OF 2:1.
8. OVERFLOW EMBANKMENT (EMERGENCY SPILLWAY) SHALL BE DESIGNED PER USDCMCHAPTER 12.
9. THE OUTLET STRUCTURE SHALL BE LOCATED IN THE EMBANKMENT OF THE EDB. THEMICROPOOL SHALL BE DIRECTLY IN FRONT OF OR INTEGRATED WITH THE STRUCTURE (SEEOUTLET STRUCTURE DETAILS).
10. PROVIDE AN INITIAL SURCHARGE VOLUME ABOVE THE MICROPOOL FOR FREQUENTEVENTS (SEE OUTLET STRUCTURE DETAILS).
11. HANDRAIL IS RECOMMENDED FOR USE ADJACENT TO COARSE GRATING AND/OR WHEREPEDESTRIAN TRAFFIC IS IN CLOSE PROXIMITY TO THE OUTLET STRUCTURE. IT IS THERESPONSIBILITY OF THE DESIGN ENGINEER TO DETERMINE WHETHER HANDRAIL IS TO BEUSED.
12. THE WELL SCREEN MAY BE OMITTED FROM THE OUTLET STRUCTURE IF THE CONTROLORIFICES ARE 2.5 INCHES IN DIAMETER OR 2 INCHES SQUARE OR GREATER.
13. EDBS SHALL BE VEGETATED WITH SEMSWA'S STANDARD SEED MIXES. ROCK AND MULCHARE NOT PERMITTED WITHIN AN EDB. SHRUBS AND TREES MAY BE PLANTED ABOVE THEEURV WATER SURFACE.
14. OUTLET MODIFICATION AND FLOOD HAZARD WARNING SIGNS SHALL BE PROVIDED ANDMEET THE REQUIREMENTS ON THE GENERAL DETAILS SHEET.
CONSTRUCTION NOTES: (INCLUDE ON CONSTRUCTION DRAWINGS)1. TEMPORARY IRRIGATION IS REQUIRED FOR ALL EDBS TO AID IN ESTABLISHING
VEGETATION. IRRIGATION HEADS SHALL BE PLACED ABOVE THE EURV AND LOCATED TOENSURE COMPLETE COVERAGE.
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DescriptionDateNo.Standard Plan Revision
6924 S. LIMA ST.
CENTENNIAL, CO 80112
PHONE (720) 874-6500
FAX (720) 874-6611
SCALE:REFERENCE:
SHEET
EMERGENCY SPILLWAY
PATH OVER CURB ONTO
EXISTING ROADWAY
(SHOWN AS EXAMPLE)
OUTLET STRUCTURE
SEE OUTLET STRUCTURE DETAILS
OUTLET PIPE
ENTRANCE
PIPE
FOREBAY
SEE FOREBAY DETAILS
100-YR WS
TRICKLE CHANNEL
SEE GENERAL DETAILS
BUILDING
PAD
EURV WS
WQ WS
O
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DescriptionDateNo.Standard Plan Revision
6924 S. LIMA ST.
CENTENNIAL, CO 80112
PHONE (720) 874-6500
FAX (720) 874-6611
SCALE:REFERENCE:
SHEETMODIFIED EXTENDEDDETENTION BASIN 1 OF 1
EXAMPLE PLAN 1
DESIGN NOTES:1. IT IS THE RESPONSIBILITY OF THE DESIGN ENGINEER TO SIZE, DESIGN AND DETAIL ALL MEDB STRUCTURES,
INCLUDING REINFORCING STEEL GRATING, ORIFICE PLATE, WELL SCREEN, HINGED OPENING FOR ACCESS ANDALL METAL WORK CONNECTIONS.
2. A MODIFIED EDB (MEDB) MAY BE USED FOR SITES WITH A TRIBUTARY AREA GREATER THAN 1 ACRE AND LESSTHAN 5 ACRES.
3. MEDB MAY PROVIDE WQCV AND FULL-SPECTRUM DETENTION (EURV AND 100-YEAR) IN A SINGLE FACILITY, ORTHESE MAY BE SPLIT BETWEEN SEPARATE FACILITIES.
4. A HARD SURFACE MAINTENANCE ACCESS IS REQUIRED TO THE MEDB OUTLET STRUCTURE VIA SIDEWALK,PARKING LOT OR OTHER FORMALIZED PATH.
5. FOREBAY AND MICROPOOL MUST BE CONCRETE. A MEDB TRICKLE CHANNEL MAY BE CONCRETE OR VEGETATED.CONCRETE TRICKLE CHANNELS SHALL BE CONSTRUCTED AT A MINIMUM LONGITUDINAL SLOPE OF 0.5%.VEGETATED TRICKLE CHANNELS ARE ONLY ALLOWED IN STABLE TRIBUTARY AREAS AND MUST BE CONSTRUCTEDWITH A 1.5-FOOT DEPTH IN ACCORDANCE WITH VOLUME 3 OF THE USDCM.
6. THE DISTANCE BETWEEN THE INLET(S) AND OUTLET SHALL BE MAXIMIZED TO MINIMIZE SHORT CIRCUITING. THEBASIN LENGTH (MEASURED ALONG THE FLOW PATH FROM THE INLET TO THE OUTLET) TO WIDTH RATIO SHOULDBE A MINIMUM OF 2:1.
7. OVERFLOW EMBANKMENT (EMERGENCY SPILLWAY) SHALL BE DESIGNED PER USDCM CHAPTER 12.
8. THE OUTLET STRUCTURE SHALL BE LOCATED IN THE EMBANKMENT OF THE MEDB. THE MICROPOOL SHALL BEDIRECTLY IN FRONT OF OR INTEGRATED INTO THE STRUCTURE (SEE OUTLET STRUCTURE DETAILS).
9. PROVIDE AN INITIAL SURCHARGE VOLUME ABOVE THE MICROPOOL FOR FREQUENT EVENTS (SEE OUTLETSTRUCTURE DETAILS).
10. HANDRAIL IS RECOMMENDED FOR USE ADJACENT TO COARSE GRATING AND/OR WHERE PEDESTRIAN TRAFFIC ISIN CLOSE PROXIMITY TO THE OUTLET STRUCTURE. IT IS THE RESPONSIBILITY OF THE DESIGN ENGINEER TODETERMINE WHETHER HANDRAIL IS TO BE USED.
11. THE WELL SCREEN MAY BE OMITTED FROM THE OUTLET STRUCTURE IF THE CONTROL ORIFICES ARE 2.5 INCHES INDIAMETER OR 2 INCHES SQUARE OR GREATER.
12. MEDBS SHALL BE VEGETATED WITH SEMSWA'S STANDARD SEED MIXES. ROCK AND MULCH ARE NOT PERMITTEDWITHIN A MEDB. SHRUBS MAY BE PLANTED ABOVE THE EURV WATER SURFACE AND TREES ABOVE THE 100-YEARWATER SURFACE.
13. OUTLET MODIFICATION AND FLOOD HAZARD WARNING SIGNS SHALL BE PROVIDED AND MEET REQUIREMENTSON THE GENERAL DETAILS SHEET.
CONSTRUCTION NOTES: (INCLUDE ON CONTRUCTION DRAWINGS)1. PERMANENT IRRIGATION IS REQUIRED FOR ALL MEDBS. IRRIGATION HEADS SHALL BE PLACED ABOVE THE EURV
AND LOCATED TO ENSURE COMPLETE COVERAGE.
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FOREBAY PLAN
E
E
GROUT TOEWALL
TRICKLE
CHANNEL
2" MIN GAP
TO DRAIN
FOREBAY
REINFORCED
GROUT SLAB
FLARED
END
SECTION
NON-REINFORCED
GROUT
RCP
D
D
D50=12"
SOIL-RIPRAP
10:1
12' M
IN.
AC
CE
SS
RA
MP
N.T.S.
OUTFLOW
INFLOW
RCP
8"
SECTION D
D50 = 12" SOIL
RIPRAP ADJACENT
TO LOW FLOW
CHANNEL
6" MIN CDOT CLASS
A FILTER MATERIAL
NON-REINFORCED
GROUT TOEWALL,
TO BE DESIGNED
BY ENGINEER
FLARED END SECTION (FES)
FINISHED GRADE
DEPRESS SLAB 6" BELOW
FES (SLOPE AT 1:1)
IMPACT BOULDER
6'
6" MIN
REINFORCED
GROUT SLAB
N.T.S.
TOP OF TRICKLE
CHANNEL CURB
TRICKLE
CHANNEL
INVERT
INFLOW
SECTION E
GROUT
6" MIN REINFORCED
GROUT SLAB
DEPRESS GROUT TO
DIRECT INTIAL OVERFLOWS
INTO TRICKLE CHANNEL
FORM GROVES IN
RAMP FOR TRACTION
GROUT DEPTH AS REQUIRED TO
PROVIDE REQUIRED VOLUME
2" MIN GAP TO
DRAIN FOREBAY
FOREBAY EDGE
BOULDER, TYP.
GROUT PROFILE
N.T.S.
6" MIN CDOT CLASS
A FILTER MATERIAL
SECTION
6" MIN CDOT CLASS
A FILTER MATERIAL
ACCESS RAMP CONSTRUCTED
WITH FILL CONCRETE
(BEYOND)
RCP
FINISHED
GRADE
A
2" MIN GAP
TO DRAIN
FOREBAY
D
50
= 12"
SOIL RIPRAP
MAINTENANCE
ACCESS ROAD
RCP
ACCESS RAMP
CONSTRUCTED WITH
FILL CONCRETE
TRICKLE
CHANNEL
TOP OF TRICKLE
CHANNEL CURB
TRICKLE CHANNEL
INVERT
2" MIN GAP GAP TO
DRAIN FOREBAY
DEPRESS CONCRETE 6" BELOW
RCP INVERT ELEVATION (SLOPE AT 1:1)
TRANSITION FROM HEIGHT
OF FOREBAY TO HEIGHT OF
TRICKLE CHANNEL CURB
12' MIN.
INFLOW A
A
CONCRETE WALL
(BEYOND)
FOREBAY PLAN
10:1 M
AX
ENERGY
DISSIPATION
WALL
D
3/4 D
N.T.S.
N.T.S.
4 MAX
1
2/3 D
8" (MIN)
INFLOW
D
OUTFLOW
8" (MIN.)
2/3 D
6" REINFORCED
GROUT SLAB
PIPE
BB
BOULDER (TYP.)
C
C
(D50=12")
SOIL RIPRAP
FOREBAY PLAN
TRICKLE
CHANNEL
OU
TF
LO
W
INFLOW
N.T.S.
FINISHED GRADE
PIPE
6" MIN. REINFORCED GROUT SLAB
6" MIN. CDOT CLASS
A FILTER MATERIAL
SECTION B
DEPRESS SLAB 6" BELOW
PIPE INVERT (SLOPE AT 1:1)
NON-REINFORCED
GROUT TOE WALL TO BE
DESIGNED BY ENGINEER
TOP OF TRICKLE
CHANNEL CURB
TRICKLE CHANNEL
INVERT
INFLOW
N.T.S.
8"
SECTION C
6" MIN. REINFORCED
GROUT SLAB
DEPRESS GROUT TO
DIRECT INTIAL OVERFLOWS
INTO TRICKLE CHANNEL
GROUT DEPTH AS
REQUIRED TO PROVIDE
REQUIRED VOLUME
2" MIN.GAP TO
DRAIN FOREBAY
FOREBAY EDGE
BOULDER, TYP.
GROUT PROFILE
N.T.S.
6" MIN. CDOT CLASS
A FILTER MATERIAL
DescriptionDateNo.Standard Plan Revision
6924 S. LIMA ST.
CENTENNIAL, CO 80112
PHONE (720) 874-6500
FAX (720) 874-6611
SCALE:REFERENCE:
SHEETFOREBAY DETAILS1 OF 1
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FOREBAY DESIGN NOTES:1. CONCRETE FOREBAY SHOWN INCLUDES ACCESS RAMP AS REQUIRED FOR STANDARD EDBS.
THIS DETAIL SHALL BE MODIFIED AS APPROPRIATE FOR MODIFIED EDBS, INCLUDINGREMOVAL OF THE ACCESS RAMP.
2. IT IS THE RESPONSIBILITY OF THE DESIGN ENGINEER TO SIZE FOREBAY AND OUTLET NOTCH(GAP) IN ACCORDANCE WITH USDCM VOLUME 3.
3. OUTLET NOTCH SHALL EXTEND TO BOTTOM ELEVATION OF FOREBAY TO ALLOW FOREBAYTO COMPLETELY DRAIN.
4. ALL CONCRETE SHALL BE REINFORCED, CAST-IN-PLACE AND DESIGNED BY A REGISTEREDPROFESSIONAL ENGINEER. THE ENGINEER SHALL DESIGN AND DETAIL CONCRETETHICKNESS, REBAR AND COLD JOINT CONNECTIONS (WHEN MULTIPLE CONCRETE POURSARE REQUIRED).
5. ALL DIMENSIONS PROVIDED ON DETAILS SHALL BE CONSIDERED MINIMUMS.
CONCRETE LINED FOREBAYN.T.S.
MEDB - BOULDER LINED FOREBAYN.T.S.
EDB BOULDER LINED FOREBAYN.T.S.
4'-0
"
100-YR
ORIFICE
PLATE
STANDARD
BAR GRATING
MANHOLE STEPS
GRATING PANEL
RESTRAINTS
18" THICK TYPE L (D50 = 9")
SOIL RIPRAP
A
CONCRETE LOW
FLOW CHANNEL
A
FLOW
3'-0" MAX
PANEL WIDTH
8" GAP COVERED
WITH HINGED
STEEL PLATE.
OUTLET STRUCTURE PLAN
N.T.S.
PROVIDE HINGED OPENING
FOR ACCESS TO STRUCTURE
PROVIDE HINGED
OPENING FOR ACCESS
TO STRUCTURE
STANDARD BAR
GRATING (1" x 4"
NOMINAL OPENINGS)
COARSE BAR
GRATING
(BARS @ 6"
CENTERS)
SECTION A
WELL SCREEN
MANHOLE STEPS
POND
BOTTOM
ELEV.
ORIFICE PLATE
(LOWEST ORIFICE AT
TOP OF MICROPOOL).
ORIFICE PLATE SIZED
FOR 40-HR RELEASE OF
WQCV AND MAX. 72 HR
RELEASE OF EURV.
MICROPOOL WATER
SURFACE
EURV WATER
SURFACE
100-YR WATER
SURFACE
100-YR
ORIFICE
PLATE
OUTLET
PIPE
INITIAL SURCHARGE ZONE
4" MIN.
2.5' DEEP
MICROPOOL
4
1
CONCRETE
TRICKLE
CHANNEL
CONCRETE RAMP
FOR EGRESS
100-YR
OUTLET
WQCV WATER
SURFACE
8" GAP IN GRATING TO ALLOW ACCESS
TO CLEAR WELL SCREEN. INSTALL
STEEL PLATE OVER OPENING WITH
HINGES AND HANDLE FOR ACCESS
TOP OF TRICKLE
CHANNEL CURB
N.T.S.
4'-0"
B
4
1
MANHOLE
STEPS
MANHOLE
STEPS
FLOW
INITIAL SURCHARGE
WATER SURFACE
MICROPOOL
WATER SURFACE
HANDRAIL
HANDRAIL
EURV WATER SURFACE
100-YR WATER SURFACE
1
3 OR FLATTER
(ABOVE
100-YR WS)
4" MIN.
2'-6" MIN.
100-YR OUTLET
8" GAP IN GRATING TO ALLOW
ACCESS TO CLEAR WELL
SCREEN. INSTALL STEEL PLATE
OVER OPENING WITH HINGES
AND HANDLE FOR ACCESS.
WQCV WATER SURFACE
WELL SCREEN
100-YR
ORIFICE
PLATE
OUTLET
PIPE
ORIFICE PLATE
SIZED FOR 40-HR
RELEASE OF WQCV
AND MAX. 72-HR
RELEASE OF EURV
LOWEST
OPENING
AT
MICROPOOL
WATER
SURFACE
STANDARD BAR GRATING
(1"x4" NOMINAL OPENINGS)
COARSE BAR GRATING
(BARS @ 6" CENTERS)
CDOT CLASS A
FILTER MATERIAL
CONCRETE RAMP
FOR EGRESS
TOP OF LOW FLOW
CHANNEL CURB
TRICKLE CHANNEL
INVERT
0.5% MIN.
100-YEAR OUTLET
SIZED TO MAINTAIN
FLOW CONTROL AT
100-YEAR ORIFICE
WITH APPROPRIATE
DEBRIS BLOCKAGE
CONSIDERATIONS
COARSE BAR GRATING
STANDARD
BAR GRATING
8" GAP. COVERED WITH
HINGED STEEL PLATE.
COARSE BAR
GRATING
LOW FLOW
CHANNEL
DEPRESSED INITIAL SURCHARGE
AREA PLANTED WITH VEGETATION
SUITED TO WETTER CONDITIONS
PROVIDE HINGED OPENING
FOR ACCESS TO STRUCTURE.
PROVIDE HINGED OPENING
FOR ACCESS TO STRUCTURE
SECTION B
N.T.S.
OUTLET STRUCTURE PLAN
N.T.S.
3'-0" MAX
PANEL WIDTH
B
DescriptionDateNo.Standard Plan Revision
6924 S. LIMA ST.
CENTENNIAL, CO 80112
PHONE (720) 874-6500
FAX (720) 874-6611
SCALE:REFERENCE:
SHEET
OUTLET STRUCTURE DETAILS 1 OF 1
MODIFIED EXTENDED DETENTION BASIN AND EXTENDEDDETENTION BASIN
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EDB OUTLET STRUCTUREN.T.S.
MEDB OUTLET STRUCTUREN.T.S.