Conservation Commission Agenda (linked)

Te <a +
ST : n
|| EROSION AND SEDIMENT CONTROL PLAN GENERAL NOTES:
1. HARDWOOD MATS (SEE DETAIL) SHALL BE USED IN STAGING AND STOCKPILE AREAS AND
CLIENT
ACCESS PATHS WHEN LOCATED WITHIN ARCHAEOLOGICALLY SENSITIVE AREAS TO PROTECT
(| DISTURBANCE OF THE GROUND SURFACE FROM CONSTRUCTION EQUIPMENT AND ACTIVITIES, GRAHAM BOARDMAN
AS DIRECTED BY ARCHAEOLOGICAL MONITOR. THEY SHALL ALSO BE USED WHERE HEAVY 
GREENVEST LLC
EQUIPMENT IS BEING USED WITHIN WETLANDS, WHERE SATURATED SOIL CONDITIONS PERSIST, |. *. 4201 NORTHVIEW DRIVE
OR WITHIN HEAVY TRAFFIC AREAS. =n SUITE 202
2. CONSTRUCTION ACCESS PATH (SEE DETAIL) SHALL BE USED IN STAGING AND STOCKPILE
AREAS AND ACCESS PATHS WHEN LOCATED OUTSIDE ARCHAEOLOGICALLY SENSITIVE AREAS.
3. ARCHAEOLOGICAL MONITORING BY QUALIFIED PERSONNEL IS REQUIRED DURING ALL GROUND |”.
H DISTURBING ACTIVITIES.
4. SAFETY/TREE PROTECTION FENCE SHALL BE INSTALLED AROUND THE PERIMETER OF LOD,
EXCEPT CROSSING THE ACTIVE CHANNEL.
5. FILTER LOG SHALL BE INSTALLED AROUND THE PERIMETER OF STAGING/STOCKPILE AREAS AS
DIRECTED BY INSPECTOR.
BOWIE, MD 20716
2 re Cr
‘/; PROJECT PROPERTY
BOUNDARY
DATE: 02052028 ISSUES/ REVISIONS
SEMI-FINAL
DESIGN
CONNECTICUT
COLLEGE ARBORETUM
CONNECTICUT
COLLEGE
GreenVest
VISION « PERFORMANCE » RESULTS
Miohabitats
‘The Stables Building 2081 Clipper Park Road
Baltimore, MD 21211 / ph: 410.554.0156
fx: 410.554.0168 / wwwbiohabitats.com
Restore ihe Earth & Inspire Eechgival Stewurdstip
ACCESS ROUTE FOR
HANDWORK WITHIN
UPSTREAM REACH IS LIMITED +”
TO FOOT TRAFFICANDATV 7
‘OR HANDWORK
WITHIN DOWNSTREAM REACH IS
USE, FOLLOWING AGREED.
UPON PATH COORDINATED A
WITH ARBORETUM £ , LIMITED TO FOOT TRAFFIC AND ATV _
S USE, FOLLOWING EXISTING PATHS 
MAMACOKE BROOK
“4 wee.
: OUTFALL CHANNEL
Y STABILIZATION AND
2S stasiuzeo RESTORATION
S882: CONSTRUCTION ©
: : SENN ENTRANCE
TEMPORARY CONSTRUCTION *> <.
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CONSTRUCTION SS Ne 8
ENTRANCE 83°. 85
= aes HORIZONTAL SCALE 8 OF 42
—_————
0 100 200
leas and designs incorporated herein, as an instrument of Professional Service, is the property of Biohabitats, Inc. and is

PROPOSED LEGEND CLIENT
——50 MAJOR CONTOUR
MINOR CONTOUR GRAHAM BOARDMAN
Lop LIMITS OF DISTURBANCE aot noRnivIew naive
LolHW LIMIT OF HAND WORK SUITE 202
CASCADE BOWIE, MD 20716
Counecneur coLLect { RIFFLE
ra “435 iar, a TELA
ATE 
DYNAMIC BOULDER
CLUSTER/WOODY COMPLEX
POST AND WATTLE
POOL WOOD/BOULDER
CLUSTER TREATMENT
DATE: 02052026 ISSUES/ REVISIONS
AT DIRECTION OF ENGINEER, INSTALL
HAND-INSTALLED BRUSH MATTRESS/POST
ASSISTED LOG STRUCTURES WITHIN THE
CHANNEL BED BETWEEN BOULDERS (SEE
DETAIL). ONE STRUCTURE APPROXIMATELY
EVERY 20 HORIZONTAL FEET, LOCATIONS
AND DENSITY TO BE DETERMINED BASED ON
AVAILABLE WOODY MATERIAL. FOOT TRAFFIC.
» ACCESS PATH OUTSIDE OF THE PROJECT LOD ;
TOBE COORDINATED win ARBORETUM.
SEMI-FINAL
DESIGN
RIFFLE (SEE
DETAIL) 7
CONNECTICUT
COLLEGE
GreenVest
VISION « PERFORMANCE » RESULTS.
INSTALL POOL WOOD/BOULDER CLUSTER
TREATMENT (SEE DETAIL) AT POOL
LOCATIONS SHOWN, OR AS DIRECTED BY
ENGINEER/DESIGNATED SPECIALIST.
MBiohabitats
‘The Stables Building 2081 Clipper Park Road
Baltimore, MD 21211 / ph: 410.554.0156
fx: 410.554.0168 / www:biohabitats.com
Restore ite Earth & Inspire Ecological Stexardship
MAMACOKE BROOK
OUTFALL CHANNEL
STABILIZATION AND
RESTORATION
Se ry Ae eagiy &
"0 SU NE. ay
ce Eo "Gh gb375 4S me
PARCEL iO 24400 ES PROPOSED
WSS we CONDITIONS
\ [PROPOSED CONDITIONS PLAN NOTES: OTE eee RE FE
1. EXCAVATION SHALL BE LIMITED TO MINIMIZE IMPACTS TO ARCHAEOLOGICALLY SENSITIVE AREAS. :
2. RE-ESTABLISH ALL IMPACTED TRAILS WITHIN THE LOD. RESTORE LOCATION AND TRAIL SURFACE =
°° e878 | GES ps
IN-KIND, UNLESS OTHERWISE DIRECTED BY THE ARBORETUM.
ia. N.
+|3. SOIL STABILIZATION MATTING SHALL BE INSTALLED ON ALL FINISHED STREAM BANKS WITHIN THE
RESTORATION LIMITS WITH SIDE SLOPES OF 3:1 OR STEEPER.
4. ARCHAEOLOGICAL MONITORING BY QUALIFIED PERSONNEL IS REQUIRED DURING ALL GROUND
DISTURBING ACTIVITIES.
,|5. ALL TRAILS/PATHS DISTURBED WITHIN THE LOD THAT HAVE BEEN DISTURBED BY CONSTRUCTION ,
! sherauey, vee tee,
ie: MOHEGAN AVE PKWY
WAKER HILL, GT 06379
TS. PC.208,
VOL. 14:
PARCEL 1D:
17 OF 42
SHALL BE RESTORED IN-KIND, MATCHING EXISTING DIMENSIONS, TRAIL SURFACE AND a |
{ SUBSURFACE MATERIAL/DEPTH AND CONDITIONS, UNLESS OTHERWISE DIRECTED BY ARBORETUM. | * x \
Ege yh X Tow = Na, qe far. 7 5 N \
Reuse of Documents: This document, and the ideas and designs incorporated herein, as an instrument of Professional Service, is the property of Biohabitats, Inc. and is not to be used in whole or in part, for any other project without the wrillen authorization of Biohabitats, Inc.

ze - 2 a pt 2 . rae f PROPOSED LEGEND
PROPOSED CONDITIONS PLAN NOTES: ¢ CLI ENT
1. EXCAVATION SHALL BE LIMITED TO MINIMIZE IMPACTS TO ARCHAEOLOGICALLY SENSITIVE AREAS. oy —— 50 ————__ MAJOR CONTOUR
2, RE-ESTABLISH ALL IMPACTED TRAILS WITHIN THE LOD. RESTORE LOCATION AND TRAIL SURFACE } j MINOR CONTOUR GRAHAM BOARDMAN
IN-KIND, UNLESS OTHERWISE DIRECTED BY THE ARBORETUM.
SOIL STABILIZATION MATTING SHALL BE INSTALLED ON ALL FINISHED STREAM BANKS WITHIN THE Lop LIMITS OF DISTURBANCE GREENVEST LLC
RESTORATION LIMITS WITH SIDE SLOPES OF 3:1 OR STEEPER. Lonw. LIMIT OF HAND WORK 4201 NORTHVIEW DRINE
ARCHAEOLOGICAL MONITORING BY QUALIFIED PERSONNEL IS REQUIRED DURING ALL GROUND SUITE 202
DISTURBING ACTIVITIES. SASCADE BOWIE, MD 20716
. ALL TRAILS/PATHS DISTURBED WITHIN THE LOD THAT HAVE BEEN DISTURBED BY CONSTRUCTION
4) SHALL BE RESTORED IN-KIND, MATCHING EXISTING DIMENSIONS, TRAIL SURFACE AND
. SUBSURFACE MATERIAL/DEPTH AND CONDITIONS, UNLESS OTHERWISE DIRECTED BY ARBORETUM.
= -—a ; RIFFLE
= A y, - ! .
i 7 SENSITIVE DYNAMIC BOULDER
i (cr 152-010) CLUSTER/WOODY COMPLEX
W/E ar: &
7 CONNECTICUT COLLEGE \ POST AND WATTLE
435 MOHEGAN AVE. PKWY
WATERFORD, CT 06320
VOL.178 P6445
Exsescuersess| POOL WOOD/BOULDER
_ PARCEL 10: 436800
CLUSTER TREATMENT
DATE: 02052028 ISSUES/ REVISIONS
INSTALL POOL WOOD/BOULDER CLUSTER
TREATMENT (SEE DETAIL) AT POOL =
‘ LOCATIONS SHOWN, OR AS DIRECTED BY
ENGINEER/DESIGNATED SPECIALIST.
A REMOVE AND DISPOSE OF EXISTING
; CULVERT AND TIMBER MAT CROSSING.
MIDDLE RESTORATION REACHH}
SEMI-FINAL
DESIGN
; MODIFY RIFFLE TO FUNCTION AS
~ >’ VEHICULAR ROCK FORD AND REALIGN
TRAIL APPROACHES TO MATCH
CROSSING LOCATION
, REMOVE AND DISPOSE OF
| EXISTING FOOTBRIDGE,
INSTALL PEDESTRIAN STEPPING
LY i eet - BOULDER CROSSING
«INSTALL STEPPING BOULDER, — gor WITHIN RIFFLE FORD TO SPAN THE
2 GROSSING JO SPAN TH wot” andl _’| RESTORED CHANNEL (SEE
nf * DETAIL). s a # ae rom . ' ] DETAIL).
= F z ” PARTIALLY FILL EXISTING CHANNEL ;
5 BETWEEN CASCADES WITH DYNAMIC C
BOULDER CLUSTER/WOODY COMPLEX
iT] ~
5 (SEE DETAIL) TO FORM DYNAMIC ONNECTICUT
é _/REACHES OF THE CHANNEL. COLLEGE
i ae
Zz i 5
X 3 CASCADE 24’RCP PIPE i
e (SEE DETAIL) INY. Se /PEDESTRIAN G ree nVest
FOOTBRIDGE
VISION « PERFORMANCE » RESULTS
*é Biohabitats
BS 001 rd
NS . “The Stables Building 2081 Clipper Park Road
a. Baltimore, MD 21211 / ph: 410.554.0156
‘ SB fe: 410.554.0168 / wwwbiohabitats.com
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v
Restore the Barth & Inspire Ecolgical Stonardsbip
MAMACOKE BROOK
OUTFALL CHANNEL
STABILIZATION AND
RESTORATION
ACCESS ROUTE FOR HANDWORK WITHIN
DOWNSTREAM REACH IS LIMITED TO FOOT %,
TRAFFIC AND ATV USE, FOLLOWING EXISTING “, * | a =
PATHS. NO CONSTRUCTION EQUIPMENT OR
GROUND DISTURBANCE PERMITTED. PROPOSED
. : : CONDITIONS
TESTI 25201.01 | SAE 1" = 20°
= °* ep1B | SER 1g
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ACCESS AND STAGING s ‘
AREA OFF BENHAM , x %
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LAYOUT (SHEET 8) “Sg few CA Grr 18 OF 42
35
Reuse of Documents: This document, and the ideas and designs incorporated herein, as an instrument of Professional Service, is the property of Biohabitals, Inc. and is not to be used in whole or in part, for any other project without the writlen authorization of Biohabitats, Inc.

MATCHLINE - SHEET 18
vol MIDDLE
RESTORATION:
wo” REACH
7
PROPOSED CONDITIONS PLAN NOTES:
EXCAVATION SHALL BE LIMITED TO MINIMIZE IMPACTS
TO ARCHAEOLOGICALLY SENSITIVE AREAS.
RE-ESTABLISH ALL IMPACTED TRAILS WITHIN THE LOD.
RESTORE LOCATION AND TRAIL SURFACE IN-KIND,
UNLESS OTHERWISE DIRECTED BY THE ARBORETUM.
SOIL STABILIZATION MATTING SHALL BE INSTALLED ON
ALL FINISHED STREAM BANKS WITHIN THE
RESTORATION LIMITS WITH SIDE SLOPES OF 3:1 OR
of
; LOCATIONS SHOWN, OR AS DIRECTED BY
ENGINEER/DESIGNATED SPECIALIST.
=o ea SS =e
x
ZONE OF HIGHEST ARCHAEOLOGICAL
SENSTWITY 0
tet 152-010)
7
o = J
INSTALL POOL WOOD/BOULDER CLUSTER
TREATMENT (SEE DETAIL) AT POOL ve
NE
CONNECTICUT COLLEGE
N
3 \ TOP
435 MOHEGAN AVE. PKYY *”
WATERFORD, CT 06320
VOLI7E POS >
LON uy GRARCEL 10; 436800, ;
~ INSTALL HAND-INSTALLED POST AND WATTLE /
». STRUCTURES AT LOCATIONS SHOWN OR AS ¢
~ DIRECTED BY ENGINEER/DESIGNATED
-., SPECIALIST (SEE DETAIL).
OF WATTLE _
EX. PHRAGMITES AREAS TO
BE CHEMICALLY TREATED FOR
i REMOVAL AND REPLANTED
=<: ACCESS ROUTE FOR HANDWORK WITHIN
DOWNSTREAM REACH IS LIMITED TO FOOT
TRAFFIC AND ATV USE, FOLLOWING EXISTING
PATHS. NO CONSTRUCTION EQUIPMENT OR
; GROUND DISTURBANCE PERMITTED.
~NOA
caval
STEEPER.
ARCHAEOLOGICAL MONITORING BY QUALIFIED
PERSONNEL IS REQUIRED DURING ALL GROUND
DISTURBING ACTIVITIES.
ALL TRAILS/PATHS DISTURBED WITHIN THE LOD THAT
HAVE BEEN DISTURBED BY CONSTRUCTION SHALL BE
RESTORED IN-KIND, MATCHING EXISTING DIMENSIONS,
TRAIL SURFACE AND SUBSURFACE MATERIAL/DEPTH
AND CONDITIONS, UNLESS OTHERWISE DIRECTED BY
ARBORETUM.
CLIENT
GRAHAM BOARDMAN
GREENVEST LLC
4201 NORTHVIEW DRIVE
SUITE 202
BOWIE, MD 20716
DATE: 02052028 ISSUES/ REVISIONS
HISTORICAL” EXTENT Lae
“"* BOLOBOSHOENUS | MARITIMUS~*—
‘ GA aU BSH BULRUSH).
ENDING DETERMINATION OF
~SPECIES PRESENCE AND. ~
~ LE CONSTRUCHO!
LAVOM
TOP OF WATTLE
=43.5FT
PROPOSED LEGEND
———50————._ MAJOR CONTOUR
MINOR CONTOUR
LIMITS OF DISTURBANCE
LIMIT OF HAND WORK
CASCADE
RIFFLE
DYNAMIC BOULDER
CLUSTER/WOODY COMPLEX
POST AND WATTLE
POOL WOOD/BOULDER
CLUSTER TREATMENT
aa
SEMI-FINAL
DESIGN
CONNECTICUT
COLLEGE
GreenVest
VISION « PERFORMANCE » RESULTS
ve Biohabitats
‘The Stables Building 2081 Clipper Park Road
Baltimore, MD 21211 / ph: 410.554.0156
fx: 410.554.0168 / www:biohabitats.com
Restore He arth &© Inspire Beolgical Stenardship
MAMACOKE BROOK
OUTFALL CHANNEL
STABILIZATION AND
RESTORATION
PROPOSED
CONDITIONS
PRORETNO. ze20101 | =A = 20"
Sue ° eet | °° ps
OWG.NO,
19 OF 42
5)
25 ACAD ProECTS
01.01
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CAD Plans \peOlml deg Reuse of Documents: This document, and the ideas and designs incorporated herein, as an instrument of Professior
* I A 3
nal Service, is the property of Biohabitats, Inc. and is not to be used in whole or in part, for any other project without the varilten authorization of Biohabitats, Inc.

DRIVE IMPORTED WOOD POSTS TO BED ANGLED INWARDS
TO WEDGE KEY LOGS/ROOTWADS AND PREVENT THEM
FROM RAFTING UP AND FLOATING AWAY IN HIGH FLOWS.
POST SPACING IS 2.5 FT ON-CENTER, ALTERNATING SIDES
EXISTING BOULDERS
FLOW
——=
WOOD POST (TYP.) KEY Loc (rve)
BRUSH MATTRESS SCOUR
PROTECTION ON
DOWNSTREAM SIDE
(BRANCHES, SALVAGED
STREAMBED MATERIAL)
BRUSH MATTRESS PACKING
MATERIAL ON UPSTREAM SIDE
(BRANCHES, SALVAGED
STREAMBED MATERIAL)
LENGTH IS APPROXIMATELY 5 FT
PROFILE
KEY LOG (TYP.)
SS
&S
&s
RY
WIDTH VARIES
10 FT TYPICAL (5 TO 15 FT RANGE)
EXISTING BOULDERS
WOOD POST (TYP.)
DRIVE IMPORTED WOOD POSTS AT ANGLES TO
WEDGE AND PIN WOODY DEBRIS TOGETHER.
ATTEMPT TO DRIVE AT LEAST 1/4 TO 1/3
FINISHED LENGTH OF STAKE INTO BED.
SECTION
TAKE ADVANTAGE OF BRANCHES ON KEY PIECES TO
POSITION POSTS AS PINS TO ANCHOR AND WEDGE
STRUCTURE INTO PLACE, POST SPACING IS 2.5 FT
ON-CENTER, ALTERNATING SIDES
_ — F EXISTING TOE
a OF SLOPE
aea ee
TM~
BRUSH MATTRESS PACKING
MATERIAL ON UPSTREAM
SIDE (BRANCHES, SALVAGED BRUSH MATTRESS SCOUR
STREAMBED MATERIAL) PROTECTION ON DOWNSTREAM
SIDE (BRANCHES, SALVAGED
STREAMBED MATERIAL)
FLOW
Woon Post (TYP.)
KEY LOG (TYP.)
ee EXISTING SS
BOULDERS Sassy
ADAPTED FROM CHANNEL-SPANNING PALS DETAIL, UTAH STATE LOW TECH PROCESSED BASED RESTORATION MANUAL
PLAN
HAND-INSTALLED BRUSH MATTRESS/POST ASSISTED LOG STRUCTURE (PALS)
HAND-INSTALLED BRUSH MATTRESS/POST ASSISTED LOG
STRUCTURE (PALS) EXECUTION:
1 . AT DIRECTION OF ENGINEER, INSTALL HAND-INSTALLED BRUSH MATTRESS/POST ASSISTED LOG STRUCTURES
WITHIN THE CHANNEL BED BETWEEN EXISTING BOULDERS. ONE STRUCTURE APPROXIMATELY EVERY 20
HORIZONTAL FEET, LOCATIONS AND DENSITY TO BE DETERMINED BASED ON AVAILABLE WOODY MATERIAL.
2. HARVEST WOODY MATERIAL ON-SITE THAT COMPLIES WITH THE MATERIAL SPECIFICATIONS. HARVEST MATERIAL
AS PART OF THE CLEARING, TREE SALVAGING, AND HABITAT MATERIAL SALVAGING AND STOCKPILING OPERATIONS
ONSITE, LEAVING AS MUCH OF THE BRANCHING AND ROOT FAN INTACT AS POSSIBLE. MATERIALS SHALL BE
HANDLED AND STORED IN A MANNER SO AS TO MINIMIZE DAMAGE TO BRANCHING AND ROOT FANS,
3. INSTALL KEY LOGS ORIENTED STREAM-WISE AND FACE THE BUTT-END OR BRANCHING/ROOT WAD END UPSTREAM
TO MAXIMIZE WIDTH OF BLOCKAGE THAT WILL CREATE DIVERGENT FLOW PATHS AROUND IT. KEY LOGS CAN BE
SUPPLIED TO THE CHANNEL VIA "CHOP AND DROP” OF TREES ALONG THE TOP OF BANK, WITH PRIOR APPROVAL
FROM ARBORETUM.
4. INSTALL CROSSING KEY LOGS ORIENTED PARALLEL TO FLOW, PUSHING ENDS INTO TOE OF BANK. USE A MIX OF
VARIOUS SIZE WOOD AND TANGLE TOGETHER WITH BRANCHES OF PARALLEL KEY LOGS.
5, BACKFILL AROUND KEY LOGS WITH BRUSH MATTRESS AND SALVAGED STREAMBED MATERIAL MATERIAL IN 1 FOOT
COMPACTED LIFTS TO FORM DENSE BRUSH MATTRESS CORE INTERWOVEN WITHIN THE KEY LOGS.
6. WHERE POSSIBLE, DRIVE POSTS INTO BED ANGLED INWARDS TO WEDGE KEY LOGS/BRUSH MATTRESS AND
PREVENT THEM FROM RAFTING UP AND FLOATING AWAY IN HIGH FLOWS. POST SPACING IS 2.5' ON-CENTER,
ALTERNATING SIDES. DRIVE AT LEAST 1/4 TO 1/3 FINISHED LENGTH OF POST INTO BED. MEANS OF ANCHORING MAY
VARY BASED ON SITE CONDITIONS AND UNDERLYING GEOLOGY. IF ALTERNATE ANCHORING IS REQUIRED, IT SHALL
BE DETERMINED BY ENGINEER.
7. INSTALL BRUSH MATTRESS TAILOUTS ON UP AND DOWNSTREAM SIDES OF STRUCTURE, WEAVING BRUSH MATTRESS
WITHIN VERTICAL IN 1 FOOT HAND-COMPACTED LIFTS. ENSURE SUFFICIENT BRUSH MATTRESS TAILOUT IS PROVIDED
ON DOWNSTREAM SIDE TO MINIMIZE VERTICAL PLUNGING FLOWS
. ONCE PALS ARE CONSTRUCTED, IMMEDIATELY STABILIZE ALL DISTURBED TIE-IN LOCATIONS AS SPECIFIED.
). THE NUMBER AND LENGTH OF KEY LOGS MAY VARY PER STRUCTURE, DEPENDING ON THE EXISTING CHANNEL
WIDTH AND DEPTH, SUFFICIENT MATERIAL IS NECESSARY TO ACHIEVE SPECIFIED GRADE, SECTION, AND DENSITY TO
INFLUENCE WATER SURFACE ELEVATION SO THAT IT IS FLOWING OVERTOP OF STRUCTURE DURING STORM EVENTS.
410. WHERE POSSIBLE, ALL MATERIAL SHALL BE DRIVEN OR PUSHED INTO STREAM BED AND BANKS TO DEPTHS
SPECIFIED WITH MINIMAL EXCAVATION. SHARPEN ENDS OF LOG WITH A CHAINSAW AND DRIVE SHARPENED INTO
GROUND AS DIRECTED BY THE ENGINEER/DESIGNATED SPECIALIST,
11. ALL EXPOSED LOG ENDS SHALL HAVE BROKEN OR ROUGHENED END, RATHER THAN SAW CUT END WHEN POSSIBLE.
12, THIS DETAIL DEPICTS THE TYPICAL PREFERRED COMPOSITION AND CONFIGURATION OF LOG MEMBERS.
ALTERATION OF THIS COMPOSITION/CONFIGURATION DUE TO ISSUES OBTAINING NECESSARY MATERIALS OR OTHER
REASON IS ACCEPTABLE ONLY WITH PRIOR APPROVAL FROM THE ENGINEER/DESIGNATED SPECIALIST. FINISHED
GRADE OF ALTERED STRUCTURES SHALL REMAIN AS SPECIFIED ON THE PLANS.
HAND-INSTALLED BRUSH MATTRESS/POST ASSISTED LOG
on
STRUCTURE (PALS) MATERIALS:
ts KEY LOGS SHALL BE COMPOSED OF LIMBS, TRUCKS, ROOTWADS WITH A MINIMUM OF 4 INCHES DIAMETER CUT TOA
LENGTH OF APPROXIMATELY 1.5 X CHANNEL WIDTH.
2. BRUSH MATTRESS SHALL BE COMPOSED OF 50% BRUSH, SMALL LIMBS AND ROOTWAD BETWEEN 1 TO 2 INCHES IN
DIAMETER AND 3 TO 5 FOOT LONG, MIXED EVENLY WITH 50% SMALLER DIAMETER AND LENGTH BRUSH AND ON-SITE
FILL MATERIAL.
. WOOD POSTS SHALL BE MIN OF 4" DIAMETER SALVAGED OR FURNISHED WOOD POSTS, 4 FEET LONG,
. ALL WOODY MATERIAL SHALL BE OBTAINED ONSITE TO MAXIMUM EXTENT POSSIBLE. ROT-RESISTANT SPECIES ARE
PREFERRED FOR USE IF AVAILABLE, BUT ANY WOOD FREE OF DEFECTS, MAJOR DAMAGE AND DECAY CAN BE USED
AS AVAILABLE.
a)
SUBMITTAL REQUIREMENTS:
1. KEY LOGS: NA
2. BRUSH MATTRESS: NA
3. WOOD POSTS: SUBMITTAL APPROVAL REQUIRED IF IMPORTED
INSPECTION REQUIREMENTS:
4. CONTRACTOR SHALL PERFORM INITIAL QC ON ALL MATERIALS.
2. ENGINEER/DESIGNATED SPECIALIST TO VISUALLY INSPECT AND PROVIDE FINAL ACCEPTANCE OF EACH STRUCTURE
BASED ON SITE INSPECTOR OR CONTRACTOR PROVIDED DOCUMENTATION (PHOTOS, ELEVATIONS).
CLIENT
GRAHAM BOARDMAN
GREENVEST LLC
4201 NORTHVIEW DRIVE
SUITE 202
BOWIE, MD 20716
DATE: 02062028 ISSUES/ REVISIONS
SEMI-FINAL
DESIGN
CONNECTICUT
COLLEGE
GreenVest
VISION « PERFORMANCE » RESULTS
Biohabitats
‘The Stables Building 2081 Clipper Park Road
Baltimore, MD 21211 / ph: 410.554.0156
fx: 410.554.0168 / www:biohabitats.com
Restore the Earth & Inspire Beolgival Stovardsbip
MAMACOKE BROOK
OUTFALL CHANNEL
STABILIZATION AND
RESTORATION
THe
UPSTREAM
RESTORATION
REACH DETAILS
SROETRIRE 25201,01 | SE NTS
NOT TO SCALE
SEAS ° 6618 [es os
0G. NO,
23 OF 42
TR WCADDYProjects\SCOLOT connecticut college mamacoke stream restoration \CAD\Flsns\atOimal dvg Reuse of Documents: This document, and the ideas and designs incorporated herein, as an instrument of Professional Service, is the property of Biohabitats, Inc. and is not to be used in whole or in part, for any other project without the written authorization of Biohabitats, Inc.

FLAT, CASCADE BED |
CASCADE BED MATERIAL.
APRON THICKNESS,
TAPERS FROM 2 TO 1 FT
GLIDE SLOPE NO:
‘STEEPER THAN 3:1.
REFER TO PROFILE
FOR DESIGN SLOPE,
CHANNEL FILL MATERIAL-
MATERIAL APRON LENGTH (L) RUN LENGTH
MIN, LENGTH = 2 FT
CASCADE
SECTION C-C"
HEIGHT (H)
DS INV.
RUN SLOPE NO STEEPER
THAN 3:1. REFER TO
PROFILE FOR DESIGN
SLOPE.
“FOOTER SHALL ST EAS ———___ tt
NIN. 2 FT BELOW POOL Bi MIN 4 FT CHANNEL FILL MATERIAL
q
CASCADE BED MATERIAL APRON
THICKNESS TAPERS FROM 2 TO 1 FT
CASCADE BOULDER (TYP.)
FOOTER BOULDERS
, {ENSURE TOP OF FOOTER BOULDERS EXTENDS
Ba rea tereyy ees AMINIMUM OF 6 INCHES INTO POOL TO PROVIDE A
RAD FLAT SURFACE F¢
GEOTEXTILE UNDER BOULDERS ORENERGY DISSIEATION)
PROFILE
}-—— LENGTH (Ll) ——-+
LOW FLOW PATH TO BE DEFINED
ee eeneyay UNDER DIRECTION OF ENGINEER
INTOURS SHOWN AS TYPICAL TO
CASCADE “AMPHITHEATER” SHAPE. REFER
Ly TO DIMENSION TABLE, PROFILE, AND
7 DESIGN PLAN FOR STRUCTURE GRADES.
~
f
}
“VW cascape
> Se SeoTIONC
J
N
|
—— TOP WIDTH (W).
a
DEEP!
{ost / }
CASCADE BED: é i)
MATERIAL APRON ;
as > POOL,
t DIS INV
S
uis INV 5c gy
FLOW A - SS _
> \ XY i x
EST POINT DEEPEST POINT
IN POOL r 2 IN POOL
POOL, \ -
D
CASCADE BOULDERS 4 \ us CASCADE BED
(ryP,) S
OBE : \ MATERIAL APRON
700 SERIES SOIL.
STABILIZATION MATTING
(SEE DETAIL FOR EXTENTS)
CASCADE
we use \R ew \)
MIN. 4 FT CASCADE
BED MATERIAL APRON
CASCADE SHALL MEET TOP WIDTH DIMENSION
2FT KEY-IN AT MIDPOINT, CASCADE WIOTH MAY TAPER BY
UP TO 20% UPSTREAM TO DOWNSTREAM
! 2FT
2FTKEYAN TOP WIDTH (WY) pale
PARABOLIC
DEPTH (D) Sr
(MINIMUM = 2 FT)
CASCADE
BOULDER
HANNEL FILL MATERIAL
(OEPTH VARIES)
ONTRACTOR SHALL INSTALL
MIN 6" THICK GRANULAR FILTER
BLANKET OR CLASS SE
GEOTEXTILE UNDER BOULDERS
SECTION C-C'
CASCADE EXECUTION:
BOULDERS SHALL BE SUBANGULAR MATERIAL AND MATCH THE APPEARANCE/COMPOSITION OF MATERIALS NATIVE TO
THIS AREA, ANGULAR RIP RAP MATERIAL WITH SHARP EDGES IS NOT ACCEPTABLE.
2. SALVAGING BOULDERS FROM OUTSIDE THE EXISTING CHANNEL IS NOT ALLOWED.
3, BOULDERS AS DISPLAYED REFLECT VARIABILITY IN STONE DIMENSION WITHIN THE MINIMUM SIZE REQUIREMENTS. THE
CONTRACTOR IS RESPONSIBLE FOR SELECTING APPROPRIATE MATERIAL TO MEET THE LENGTH, WIDTH, DEPTH, AND
SLOPE REQUIREMENTS AS OUTLINED ON THIS SHEET. THE NUMBER OF BOULDERS AND THEIR CONFIGURATION MAY
VARY FROM THIS PLAN.
4, ALL BOULDERS SHALL BE PLACED WITH EDGES ALIGNED TIGHTLY TO MINIMIZE VOID SPACE.
5, THE CROSS SECTION SHALL BE CONSTRUCTED IN A PARABOLIC SHAPE BETWEEN GIVEN NODES.
6. NATURAL CHANNEL MATERIAL MAY 8E HARVESTED ON-SITE PRIOR TO INSTALLATION OF CASCADE WEIR IF IT MEETS THE
SPECIFICATIONS FOR USE AS WASH-IN OR RIFFLE MIX,
7. TIE-OUT BOULDER SHALL EXTEND PAST THE DOWNSTREAM CORNER NODES A & E A MIN. OF ONE BOULDER LENGTH
(B-AXIS) INTO EXISTING BANK. WHERE THIS CONFLICTS WITH EXISTING TREE ROOTS OR BEDROCK, TIE-OUT BOULDER
MAY BE ELIMINATED OR ADJUSTED AT DIRECTION OF ENGINEER.
8. CHANNEL WASH-IN MATERIAL SHALL BE REPEATEDLY WORKED INTO FULL DEPTH OF THE RIFFLE MIX AND CASCADE
BOULDER TO FILL VOIDS.
9, TRIM ALL GEOTEXTILE AT OR BELOW FINISHED GRADE, IF USED.
410, ONCE CASCADE WEIR IS CONSTRUCTED, STABILIZE ALL DISTURBED LOCATIONS AS SPECIFIED.
41, CONTOURS ARE PROVIDED TO REPRESENT TYPICAL PARABOLIC SHAPE, AND DO NOT REFLECT DESIGN CONTOURS.
REFER TO STRUCTURE TABLE AND PLAN VIEW FOR DIMENSIONS.
12. SEE STRUCTURE TABLES ON SHEET 33 FOR NODE LOCATION INFORMATION.
13, SEE PROFILE FOR UPSTREAM AND DOWNSTREAM INVERT NODES (U/S-INV AND D/S-INV).
BOULDER DIMENSIONS (FT) (¢ 0.25 FT) CASCADE BED MATERIAL GRADATION TABLE
BOULDERTYPE | A-AxiS | B-AXIS | C-AXIS SOMME EINER SIZE (IN)
CASCADE/FOOTER| 2.5 25 15 ‘i RSC REACH
10 52
ot ioe
al 15 64
30 8.6
C-AXIS 50 12.0
AAXIS
(LENGTH) SER (HEIGHT) 85 17.0
casos - we
BOULDER AXIS NOT TO SCALE
CASCADE MATERIALS:
CHANNEL FILL MATERIAL SHALL BE COMPOSED OF 80% IMPORTED OR ON-SITE SALVAGED MATERIAL MIXED WITH 20%
HARDWOOD MULCH BY VOLUME. IMPORTED MATERIAL SHALL CONSIST OF SAND, LOAMY SAND, SANDY LOAM AND LOAM
TEXTURES, AS DEFINED BY USDA. MATERIAL GRADATION SHALL BE UP TO 20% CLAY (<0.002 MM) UP TO 50% SILT (0.002 MM
TO 0.05 MM), 30% TO 100% SAND (0.05 MM TO 2.0 MM), AND UP TO 5% GRAVEL (2.0MM TO 2.0 IN). SALVAGED MATERIAL SHALL.
ONLY BE GENERATED FROM APPROVED ON-SITE GRADING ACTIVITIES AND MEET THE SPECIFICATIONS FOR IMPORTED
MATERIAL. HARDWOOD MULCH SHALL CONSIST OF NATURAL UNCOMPOSTED WOOD AND BARK FROM HARDWOOD TREES
THAT HAVE BEEN MILLED TO A MINIMUM PARTICLE SIZE OF 14 X 1/2 X 1/4 INCH AND MAXIMUM PARTICLE SIZE OF 4 X 4 X 2 INCH
WITH LESS THAN 20% SAWDUST.
2. GEOTEXTILE SHALL BE NON-WOVEN CLASS 2 GEOTEXTILE FABRIC.
3. GRANULAR FILTER BLANKET SHALL BE COMPOSED OF AN EVENLY MIXED COARSE SAND AND NO 57 STONE, WITH 50% NO 57
STONE AND 50% COARSE SAND.
4. BOULDERS SHALL MEET THE DIMENSIONS PROVIDED ON THIS DETAIL. BOULDERS SHALL BE SUBANGULAR MATERIAL AND
MATCH THE APPEARANCE/COMPOSITION OF MATERIALS NATIVE TO THIS AREA (E.G. GLACIAL FLUVIAL AND TILL DEPOSITS).
ANGULAR RIP RAP MATERIAL WITH SHARP EDGES IS NOT ACCEPTABLE.
5. CASCADE BED MATERIAL SHALL MEET THE GRADATIONS SHOWN IN TABLE AND MATCH THE APPEARANCE/COMPOSITION OF
MATERIALS NATIVE TO THIS AREA (E.G. GLACIAL FLUVIAL AND TILL DEPOSITS). CASCADE BED MATERIAL SHALL BE
COMPOSED OF A COMBINATION OF APPROXIMATELY 70% COBBLE, RANGING FROM ROUNDED TO SUB-ANGULAR SHAPED,
AND UP TO 30% ANGULAR COBBLE THAT MEETS THE SIZE GRADATIONS SHOWN.
6. WASH-IN MATERIAL SHALL BE COMPOSED OF EVENLY MIXED SAND AND GRAVEL MATERIAL, WITH 50% BANKRUN GRAVEL
AND 50% COARSE SAND.
7. SOIL STABILIZATION MATTING SHALL BE COMPOSED OF 700 GRAM/SQ METER 100% NATURAL BIODEGRADABLE COCONUT
FIBERS HAVING A MINIMUM LONGEVITY OF 4 YEARS. THICKNESS SHALL BE AT LEAST 0.35 INCHES, WITH OPEN AREA OF 50%.
SLEMICTAT. REQUIREMENTS:
CHANNEL FILL MATERIAL: SUBMITTAL APPROVAL REQUIRED. INCLUDE PHOTOS OR SAMPLE FROM QUARRY/MATERIAL
SUPPLIER PRIOR TO DELIVERY
2. GEOTEXTILE: SUBMITTAL APPROVAL REQUIRED
3. GRANULAR FILTER BLANKET: SUBMITTAL APPROVAL REQUIRED
4. BOULDERS: SUBMITTAL APPROVAL REQUIRED. INCLUDE PHOTOS OR SAMPLE FROM QUARRY/MATERIAL SUPPLIER PRIOR TO
DELIVERY
5. CASCADE BED MATERIAL: SUBMITTAL APPROVAL REQUIRED. INCLUDE PHOTOS OR SAMPLE FROM QUARRY/MATERIAL,
SUPPLIER PRIOR TO DELIVERY
6. WASH-IN MATERIAL: SUBMITTAL APPROVAL REQUIRED
7. SOIL STABILIZATION MATTING: SUBMITTAL APPROVAL REQUIRED
INSPECTION REQUIREMENTS:
4. CONTRACTOR SHALL PERFORM INITIAL QC ON ALL MATERIALS.
2. ENGINEER/DESIGNATED SPECIALIST TO VISUALLY INSPECT AND PROVIDE FINAL ACCEPTANCE OF EACH STRUCTURE BASED
ON SITE INSPECTOR OR CONTRACTOR PROVIDED DOCUMENTATION (PHOTOS, ELEVATIONS).
CLIENT
GRAHAM BOARDMAN
GREENVEST LLC
4201 NORTHVIEW DRIVE
SUITE 202
BOWIE, MD 20716
DATE: 02062028 _ISSUES/REVISIONS
SEMI-FINAL
DESIGN
CONNECTICUT
COLLEGE
GreenVest
VISION « PERFORMANCE + RESULTS
>Biohabitats
‘The Stables Building 2081 Clipper Park Road
Baltimore, MD 21211 / ph: 410.554.0156
fx: 410.554.0168 / wwwbiohabitats.com
Restore tte
aril & Inspire Eicolzgical Stensard
MAMACOKE BROOK
OUTFALL CHANNEL
STABILIZATION AND
RESTORATION
TM MIDDLE
RESTORATION
REACH DETAILS
ERECTING, 2520.01 | #£ NTS
NOT TO SCALE
SEAL ® cate [s= Ds
2G. HO,
24 OF 42
5 wae CADDY PFo]eTS SCOOT
sollees: streams CAD Elena \qUOTmAL AVE Reuse of Documents: This document, and the ideas and designs incorporated herein, as an instrument of Professional Service, is the property of Biohabilats, Inc. and is not to be used in whole or in part, for any other project without the written authorization of Biohabitats, Inc.

—_— CROSS SECTION WIDTH ——————+1
CROSS SECTION DEPTH
700 SERIES SOIL
STABILIZATION
MATTING (SEE
DETAIL FOR
EXISTING EXTENTS)
CROSS SECTION WIDTH —
EXISTING CROSS SECTION
700 SERIES SOIL
STABILIZATION
MATTING
(SEE DETAIL
FOR EXTENTS)
RIFFLE WOOD / GRADE TIE-OUT BOULDER
PROPOSED
CHANNEL FILL RIFFLE
MATERIAL DEPTH GRADE BOULDER NONWOVEN
ABIES RIFFLE BED MATERIAL - , GEOTEXTILE
PLACE TO 2 FT THICKNESS VOR Enos CHANNEL FILL EXISTING GROUND
EXISTING GROUND FROM RIFFLE MAX MATERIAL
GLIDE LENGTH RIFFLE LENGTH RUN LENGTH EXTEND RIFFLE BED
(SEE PROFILE) [> (SEE PROFILE) |_- (SEE PROFILE) MATERIAL APRON MIN 2°
Atel Ate PAST FOOTER BOULDER ae
id 5 RANDOM bales TOPOCL BOTTOM BOULDER GRADE \
ole BOULDERS © toy ae CONTROL
i in —
EIS 918 _. = ADD SUPPLEMENTAL “ ENLARGEMENT \
|e RIFFLEBED = Ble = RIFFLE BED MATERIAL / \
SEE PROFILE lg MATERIAL -2FT 8(0 —-—— ABOVE BOULDERS AS
FOR SLOPE THICKNESS \ SHOWN
FLOW
UPSTREAM
POOL
RIFFLE BOULDER
NON-WOVEN GEOTEXTILE
EXTEND FOOTER BOULDER MIN. 1 FT BELOW
POOL TIE-IN ELEVATION SHOWN ON PROFILE
PROFILE
EXISTING CHANNEL INVERT
EXISTING GROUND
CHANNEL FILL MATERIAL
(DEPTH VARIES)
GLIDE LENGTH SEE
RIFFLE LENGTH SEE PROFILE
DOWNSTREAM B.axis|
POOL
SEE PROFILE FOR
RUN SLOPE
BOULDER DIMENSIONS (FT) (+ 0.25 FT)
BOULDER TYPE | A-AXIS | B-AXIS | C-AXIS
RANDOMI/TIE-OUT 2.0 15 1.5
RIFFLE/FOOTER 25 2.0 1.5
B-AXIS
PROFILE tH
i. 5 (WIDTH)
WS WIA C-AXIS
rm TIE-OUT BOULDERS Sion (HEIGHT)
LOW FLOW 412 RANDOM z (LENGTH) NK)
PATHS TO BE EIS BOULDERS (TYP. EACH SIDE)
DEFINED eae) RIFFLE
UNDER NOT TO SCALE
DIRECTION cna oo BOULDER AXIS
OF ENGINEER
RIFFLE BED MATERIAL GRADATION TABLE
q CUMULATIVE % FINER Se
= RSC REACH
DOWNSTREAM
1 .
<> Poo o Be
ws 15 6.1
ar MID ORDINATE 30 7)
upsTREAM L I DISTANCE = 15% - 20% -
POOL<—> OF RIFFLE WIDTH 50 12.0
. 85 17.0
[— EXTEND RIFFLE BED 100 19.2
MATERIAL APRON
J MIN. 2' PAST FOOTER
BOULDER TO POOL
EXTEND RIFFLE BOTTOM
BED MATERIAL | — FOOTER BOULDER
GLIDE TO POOL - EXTEND TO
|_ BOTTOMAS CHANNEL LIMITS
SHOWN ON GLIDE EXTENDS
PROFILE, AT BOTTOM OF 5
MIN. WIDTH OF POOL NATURAL CHANNEL MATERIAL SHALL BE INTERMITTENTLY
2/3 OF RIFFLE WASHED OR WORKED INTO THE RIFFLE BED MATERIAL TO
MINIMIZE VOID SPACE IN THE MIXTURE
NOT TO SCALE
FFLE EXECUTION:
Rl
1.
2.
8.
9.
10.
11.
12.
13.
INSTALL RIFFLE STRUCTURES AT LOCATIONS SHOWN ON PLAN AND PROFILE, SEE STRUCTURE TABLES ON SHEET 33 FOR
NODE LOCATIONS, SEE PROFILE FOR UPSTREAM AND DOWNSTREAM INVERT NODES (U/S-INV AND D/S-INV).
SALVAGE EXISTING BOULDERS AND STREAMBED MATERIAL WITHIN THE EXISTING CHANNEL FOR RE-USE WHEN IT MEETS
THE SPECIFICATIONS AND IS LOCATED WITHIN PROPOSED GRADING LIMITS. SALVAGING BOULDERS FROM OUTSIDE THE
EXISTING CHANNEL IS NOT ALLOWED. MATERIALS SHALL BE HANDLED AND STORED IN A MANNER SO AS TO MINIMIZE
DAMAGE.
WHEN CONSTRUCTED IN AREAS OF FILL, EXISTING STREAM CHANNEL TO BE FILLED IN 8" LIFTS WITH CHANNEL FILL
MATERIAL TO REACH SUBGRADE ELEVATION DEFINED BY PROFILE. WHEN CONSTRUCTED IN AREAS OF CUT, CHANNEL
FILL MATERIAL UNDER BOULDERS AND STREAMBED MATERIAL IS NOT NEEDED. IN CASES OF SHALLOW BEDROCK,
FOOTER BOULDERS MAY BE ELIMINATED WITH APPROVAL FROM ENGINEER/DESIGNATED SPECIALIST.
AS NEEDED, EXCAVATE THE DOWNSTREAM TIE OUT AREA FOR FOOTER BOULDERS AND INSTALL THE BOULDER GRADE
CONTROL FOOTERS AND RIFFLE BOULDERS, INSTALLING A CONTINUOUS SHEET OF GEOTEXTILE OR GRANULAR FILTER
BLANKET UNDER ALL BOULDERS. TOP FACE OF RIFFLE BOULDERS SHALL BE PARABOLIC IN SHAPE BETWEEN NODES AND
MEET FINISHED GRADE DEFINED BY STRUCTURE TABLE NODES AND CROSS SECTION. THE NUMBER OF BOULDERS
VARIES DEPENDING ON TYPICAL SECTION WIDTH AND BOULDER DIMENSIONS.
THE BOULDERS SHALL BE TILTED DOWNSTREAM AS SHOWN ON THE DETAIL AND NOT STACKED. STAGGER SEAMS OF
BOULDERS BETWEEN EACH ROW. ALL BOULDERS SHALL BE PLACED WITH EDGES ALIGNED TIGHTLY TO MINIMIZE VOID
SPACE. INSTALL RIFFLE BED MATERIAL APRON TO BLEND INTO DOWN STREAM POOL AS SHOWN ON DETAIL,
TIE-OUT BOULDER SHALL EXTEND PAST THE CORNER NODES DS-R & DS-L A MINIMUM OF ONE BOULDER LENGTH (B-AXIS)
INTO EXISTING BANK. WHERE THIS CONFLICTS WITH EXISTING TREE ROOTS OR BEDROCK, TIE-OUT BOULDER MAY BE
ELIMINATED OR ADJUSTED AT DIRECTION OF ENGINEER/DESIGNATED SPECIALIST.
RIFFLE BOULDERS AND RIFFLE WOOD SHALL BE INCORPORATED IN A RANDOM PLACEMENT WITHIN THE RIFFLE
FOOTPRINT. RANDOM BOULDERS AND RIFFLE WOOD SHALL COVER APPROXIMATELY 40% OF THIS SURFACE AREA. TOP
OF BOULDER AND WOOD SHALL BE SET FLUSH OR UP TO 4 INCHES ABOVE FINISHED GRADE OF RIFFLE BED MATERIAL.
PLACE RIFFLE BED MATERIAL UPSTREAM OF THE BOULDER GRADE CONTROL TO THE FINISHED GRADES, COMPRESSING
MATERIALS TO MAINTAIN PARABOLIC CROSS SECTION SHAPE.
GRAVEL WASH-IN MATERIAL SHALL BE REPEATEDLY WORKED INTO FULL DEPTH OF THE RIFFLE BED MATERIAL TO FILL
VOIDS.
EXCAVATE UPSTREAM POOL AND INSTALL RIFFLE BED MATERIAL GLIDE AS SHOWN ON DETAIL.
TRIM ALL EXPOSED GEOTEXTILE AT OR BELOW FINISHED GRADE.
PERFORM TIE-OUT GRADING AND INSTALL SOIL STABILIZATION MATTING.
ONCE RIFFLE IS CONSTRUCTED, STABILIZE ALL DISTURBED TIE-IN LOCATIONS AS SPECIFIED.
ROCK FORD / STEPPING STONE MODIFICATION:
1.
FOR LOCATION WHERE THE TRAIL CROSSES THE CHANNEL AT A PROPOSED RIFFLE, THE CONFIGURATION OF RANDOM
BOULDERS AND RIFFLE WOOD SHALL BE MODIFIED TO ALLOW RIFFLE TO BE USED AS BOTH ROCK FORD FOR VEHICULAR
CROSSINGS AND PEDESTRIAN CROSSING
ROCK FORD MODIFICATION - RANDOM BOULDERS AND RIFFLE WOOD SHALL BE INSTALLED FLUSH WITH RIFFLE BED
MATERIAL. TRANSITION RIFFLE MATERIAL UP SIDESLOPES TO ENSURE STABLE CROSSING.
STEPPING BOULDERS - SEE STEPPING BOULDER DETAIL FOR INSTALLATION
CHANNEL FILL MATERIAL SHALL BE COMPOSED OF 80% IMPORTED OR ON-SITE SALVAGED MATERIAL MIXED WITH 20%
HARDWOOD MULCH BY VOLUME. IMPORTED MATERIAL SHALL CONSIST OF SAND, LOAMY SAND, SANDY LOAM AND LOAM
TEXTURES, AS DEFINED BY USDA. MATERIAL GRADATION SHALL BE UP TO 20% CLAY (<0.002 MM) UP TO 50% SILT (0.002 MM
TO 0.05 MM), 30% TO 100% SAND (0.05 MM TO 2.0 MM), AND UP TO 5% GRAVEL (2.0MM TO 2.0 IN). SALVAGED MATERIAL
SHALL ONLY BE GENERATED FROM APPROVED ON-SITE GRADING ACTIVITIES AND MEET THE SPECIFICATIONS FOR
IMPORTED MATERIAL. HARDWOOD MULCH SHALL CONSIST OF NATURAL UNCOMPOSTED WOOD AND BARK FROM
HARDWOOD TREES THAT HAVE BEEN MILLED TO A MINIMUM PARTICLE SIZE OF 1 X 1/2 X 1/4 INCH AND MAXIMUM PARTICLE
GEOTEXTILE SHALL BE NON-WOVEN CLASS 2 GEOTEXTILE FABRIC.
GRANULAR FILTER BLANKET SHALL BE COMPOSED OF AN EVENLY MIXED COARSE SAND AND NO 57 STONE, WITH 50% NO
BOULDERS SHALL MEET THE DIMENSIONS PROVIDED ON THIS DETAIL. BOULDERS SHALL BE SUBANGULAR MATERIAL AND.
MATCH THE APPEARANCE/COMPOSITION OF MATERIALS NATIVE TO THIS AREA (E.G. GLACIAL FLUVIAL AND TILL
DEPOSITS). ANGULAR RIP RAP MATERIAL WITH SHARP EDGES IS NOT ACCEPTABLE.
RIFFLE WOOD SHALL BE COMPOSED OF LIMBS AND TRUCKS BETWEEN 8 AND 12 INCHES DIAMETER, CUT TO A LENGTH OF
RIFFLE BED MATERIAL SHALL MEET THE GRADATIONS SHOWN IN TABLE AND MATCH THE APPEARANCE/COMPOSITION OF
MATERIALS NATIVE TO THIS AREA (E.G. GLACIAL FLUVIAL AND TILL DEPOSITS), RIFFLE BED MATERIAL SHALL BE
COMPOSED OF A COMBINATION OF APPROXIMATELY 70% COBBLE, RANGING FROM ROUNDED TO SUB-ANGULAR SHAPED,
AND UP TO 30% ANGULAR COBBLE THAT MEETS THE SIZE GRADATIONS SHOWN.
WASH-IN MATERIAL SHALL BE COMPOSED OF EVENLY MIXED SAND AND GRAVEL MATERIAL, WITH 50% BANKRUN GRAVEL.
SOIL STABILIZATION MATTING SHALL BE COMPOSED OF 700 GRAM/SQ METER 100% NATURAL BIODEGRADABLE COCONUT
FIBERS HAVING A MINIMUM LONGEVITY OF 4 YEARS. THICKNESS SHALL BE AT LEAST 0.35 INCHES, WITH OPEN AREA OF
3.
RIFFLE MATERIALS:
ts
SIZE OF 4 X 4 X2 INCH WITH LESS THAN 20% SAWDUST.
2.
3.
57 STONE AND 50% COARSE SAND.
4.
5.
APPROXIMATELY 0.5 X CHANNEL WIDTH.
6.
%
AND 50% COARSE SAND.
8.
50%.
9.
ALL WOODY MATERIAL SHALL BE OBTAINED ONSITE TO MAXIMUM EXTENT POSSIBLE. ROT-RESISTANT SPECIES ARE
PREFERRED FOR USE IF AVAILABLE. BUT ANY WOOD FREE OF DEFECTS, MAJOR DAMAGE AND DECAY CAN BE USED AS
AVAILABLE.
SUBMITTAL REQUIREMENTS:
1.
BON
5.
6.
ZL
8.
CHANNEL FILL MATERIAL: SUBMITTAL APPROVAL REQUIRED. INCLUDE PHOTOS OR SAMPLE FROM QUARRY/MATERIAL
SUPPLIER PRIOR TO DELIVERY
GEOTEXTILE: SUBMITTAL APPROVAL REQUIRED
GRANULAR FILTER BLANKET: SUBMITTAL APPROVAL REQUIRED
BOULDERS: SUBMITTAL APPROVAL REQUIRED, INCLUDE PHOTOS OR SAMPLE FROM QUARRY/MATERIAL SUPPLIER PRIOR
TO DELIVERY
RIFFLE WOOD: NA
RIFFLE BED MATERIAL: SUBMITTAL APPROVAL REQUIRED. INCLUDE PHOTOS OR SAMPLE FROM QUARRY/MATERIAL
SUPPLIER PRIOR TO DELIVERY
WASH-IN MATERIAL: SUBMITTAL APPROVAL REQUIRED
SOIL STABILIZATION MATTING: SUBMITTAL APPROVAL REQUIRED
INSPECTION REQUIREMENTS:
1.
2.
CONTRACTOR SHALL PERFORM INITIAL QC ON ALL MATERIALS.
ENGINEER/DESIGNATED SPECIALIST TO VISUALLY INSPECT AND PROVIDE FINAL ACCEPTANCE OF EACH STRUCTURE
BASED ON SITE INSPECTOR OR CONTRACTOR PROVIDED DOCUMENTATION (PHOTOS, ELEVATIONS).
CLIENT
GRAHAM BOARDMAN
GREENVEST LLC
4201 NORTHVIEW DRIVE
SUITE 2
BOWIE,
02
MD 20716
DATE: 02052028 ISSUES/ REVISIONS
SEMI-FINAL
DESIGN
CONNECTICUT
COLLEGE
GreenVest
VISION « PERFORMANCE » RESULTS
© Biohabitats
‘The Stables Building 2081 Clipper Park Road
Baltimore, MD 21211 / ph: 410.554.0156
fx: 410.554.0168 / wwwbiohabitats.com
Restore the Earth & Inspire Beolzgival Stmardsbip
MAMACOKE BROOK
OUTFALL CHANNEL
STABILIZATION AND
RESTORATION
i MIDDLE
RESTORATION
REACH DETAILS
°* 6818 [= Ds
008. 0,
25 OF 42
5 —ANCADDPFo|eTS\CSCOT OY connesUicut collage mamacoke stream restoration \CAD Plans \alOTmlavg
Reuse of Documents: This document, and the ideas and designs incorporated herein, as an instrument of Professional Service, is the property of Biohabitats, Inc. and is not to be used in whole or in part, for any other project without the written authorization of Biohabitats, Inc.

DRIVE WOOD POSTS TO BED ANGLED INWARDS TO
WEDGE KEY LOGS/ROOTWADS AND PREVENT
THEM FROM RAFTING UP AND FLOATING AWAY IN
HIGH FLOWS. POSTS MAX 1.5' ON-CENTER.
POCKET POOL,
BRUSH MATTRESS PACKING MATERIAL
(BRANCHES, STREAMBED MATERIAL)
BOULDER CLUSTER
WOOD POST (TYP.)
UPSTREAM
KEY LOG (TYP.)
CASCADE
DOWNSTREAM
CASCADE
PROFILE
CHANNEL SPANNING WOOD.
(IF SUFFICIENT WOOD
QUANTITIES AVAILABLE)
GRADE UPPER BANKS TO MAX SLOPE OF 3:1 AND
STABILIZE WITH 700 SERIES SOIL STABILIZATION
MATTING (SEE DETAIL FOR EXTENTS.
NORMAL WATER
SURFACE ELEVATION
EXISTING CHANNEL
WIDTH (VARIES)
KEY LOG (TYP.)
TLL
QYOEUL
CLL
pT
Be
CLUSTER
EXTEND 1 FT PAST
TOP OF BANK
DRIVE WOOD POSTS AT WOOD POST (TYP.)
ANGLES TO WEDGE AND PIN
WOODY DEBRIS TOGETHER.
POCKET POOL
EXTEND 1 FT PAST
BOULDER
BRUSH MATTRESS PACKING CLUSTER TOP OF BANK
MATERIAL (BRANCHES,
SALVAGED STREAMBED
MATERIAL)
EXISTING TOE
OF SLOPE
LOW FLOW PATHS TO BE KEY LOG (TYP.) SZ
DETERMINED UNDER WOOD POST (TYP.)
DIRECTION OF ENGINEER
DYNAMIC BOULDER CLUSTER/WOODY COMPLEX
DYNAMIC BOULDER CLUSTER/WOODY COMPLEX EXECUTION:
fs
INSTALL DYNAMIC BOULDER CLUSTER/WOODY COMPLEX AT LOCATIONS AND ELEVATIONS SHOWN ON PLAN AND
PROFILE, PARTIALLY FILLING THE EXISTING CHANNEL BETWEEN GRADE CONTROL STRUCTURES.
2. SALVAGE EXISTING BOULDERS AND STREAMBED MATERIAL WITHIN THE EXISTING CHANNEL FOR RE-USE WHEN IT
MEETS THE SPECIFICATIONS AND IS LOCATED WITHIN PROPOSED GRADING LIMITS. SALVAGING BOULDERS FROM
OUTSIDE THE EXISTING CHANNEL IS NOT ALLOWED. MATERIALS SHALL BE HANDLED AND STORED IN A MANNER SO
AS TO MINIMIZE DAMAGE.
3. HARVEST WOODY MATERIAL ON-SITE THAT COMPLIES WITH THE MATERIAL SPECIFICATIONS. HARVEST MATERIAL AS
PART OF THE CLEARING, TREE SALVAGING, AND HABITAT MATERIAL SALVAGING AND STOCKPILING OPERATIONS
ONSITE, LEAVING AS MUCH OF THE BRANCHING AND ROOT FAN INTACT AS POSSIBLE. MATERIALS SHALL BE HANDLED
AND STORED IN A MANNER SO AS TO MINIMIZE DAMAGE TO BRANCHING AND ROOT FANS.
4. INSTALL KEY LOGS, MINIMUM EVERY 10 FT, ORIENTED DIAGONALLY ACROSS THE CHANNEL, PUSHING ENDS INTO TOE
OF BANK. USE A MIX OF VARIOUS SIZE WOOD AND TANGLE TOGETHER WITH BRANCHES OF PARALLEL KEY LOGS.
5. INSTALL BOULDERS IN CLUSTERS AROUND THE KEY LOGS TO PROVIDE BALLAST AND A DIVERSITY OF FLOWPATHS.
SPACE CLUSTERS APPROXIMATELY EVERY 10 FT IN CHANNEL LENGTH, WITH 3 BOULDERS PER CLUSTER.
6. BACKFILL AROUND KEY LOGS/ROOT WADS AND BOULDER CLUSTERS WITH SALVAGED STREAMBED MATERIAL IN 1
FOOT COMPACTED LIFTS TO FORM DENSE BRUSH MATTRESS CORE INTERWOVEN WITHIN THE KEY LOGS.
7. WHERE POSSIBLE, DRIVE POSTS INTO BED ANGLED INWARDS TO WEDGE KEY LOGS/BRUSH MATTRESS AND PREVENT
THEM FROM RAFTING UP AND FLOATING AWAY IN HIGH FLOWS. POST SPACING IS 2.5' ON-CENTER, ALTERNATING
SIDES. DRIVE AT LEAST 1/4 TO 1/3 FINISHED LENGTH OF POST INTO BED. MEANS OF ANCHORING MAY VARY BASED ON
SITE CONDITIONS AND UNDERLYING GEOLOGY. IF ALTERNATE ANCHORING IS REQUIRED, IT SHALL BE DETERMINED
BY ENGINEER.
8, ONCE CONSTRUCTED, IMMEDIATELY STABILIZE ALL DISTURBED TIE-IN LOCATIONS AS SPECIFIED.
9. THE NUMBER AND LENGTH OF KEY LOGS MAY VARY PER STRUCTURE, DEPENDING ON THE EXISTING CHANNEL
WIDTH AND DEPTH. SUFFICIENT MATERIAL IS NECESSARY TO ACHIEVE SPECIFIED GRADE, SECTION, AND DENSITY TO
INFLUENCE WATER SURFACE ELEVATION SO THAT IT IS FLOWING OVERTOP OF STRUCTURE DURING STORM EVENTS.
10. WHERE POSSIBLE, ALL MATERIAL SHALL BE DRIVEN OR PUSHED INTO STREAM BED AND BANKS TO DEPTHS
SPECIFIED WITH MINIMAL EXCAVATION. SHARPEN ENDS OF LOG WITH A CHAINSAW AND DRIVE SHARPENED INTO
GROUND AS DIRECTED BY THE ENGINEER/DESIGNATED SPECIALIST.
11. ALL EXPOSED LOG ENDS SHALL HAVE BROKEN OR ROUGHENED END, RATHER THAN SAW CUT END WHEN POSSIBLE.
12. THIS DETAIL DEPICTS THE TYPICAL PREFERRED COMPOSITION AND CONFIGURATION OF LOG MEMBERS. ALTERATION
OF THIS COMPOSITION/CONFIGURATION DUE TO ISSUES OBTAINING NECESSARY MATERIALS OR OTHER REASON IS
ACCEPTABLE ONLY WITH PRIOR APPROVAL FROM THE ENGINEER/DESIGNATED SPECIALIST. FINISHED GRADE OF
ALTERED STRUCTURES SHALL REMAIN AS SPECIFIED ON THE PLANS.
DYNAMIC BOULDER CLUSTER/WOODY COMPLEX MATERIALS:
1, KEY LOGS SHALL BE COMPOSED OF LIMBS, TRUCKS, ROOTWADS WITH A MINIMUM OF 18 INCHES DIAMETER CUT TOA
LENGTH OF APPROXIMATELY 1.5 X CHANNEL WIDTH.
2. BRUSH MATTRESS SHALL BE 50% BRUSH MIXED WITH 50% SALVAGED OR IMPORTED BED MATERIAL WITH A D50 OF 6".
THE BRUSH COMPONENT SHALL BE COMPOSED OF AN EVEN MIX OF SMALL LIMBS AND ROOTWAD BETWEEN 4 TO 8
INCHES IN DIAMETER AND 3 TO 6 FOOT LONG, MIXED EVENLY WITH SMALLER DIAMETER AND LENGTH BRUSH.
3. BOULDERS SHALL MEET THE DIMENSIONS PROVIDED ON THIS DETAIL. BOULDERS SHALL BE SUBANGULAR MATERIAL
AND MATCH THE APPEARANCE/COMPOSITION OF MATERIALS NATIVE TO THIS AREA (E.G. GLACIAL FLUVIAL AND TILL
DEPOSITS). ANGULAR RIP RAP MATERIAL WITH SHARP EDGES IS NOT ACCEPTABLE.
WOOD POSTS SHALL BE MIN OF 4" DIAMETER SALVAGED OR FURNISHED WOOD POSTS, 4 FEET LONG.
ALL WOODY MATERIAL SHALL BE OBTAINED ONSITE TO MAXIMUM EXTENT POSSIBLE. ROT-RESISTANT SPECIES ARE
PREFERRED FOR USE IF AVAILABLE. BUT ANY WOOD FREE OF DEFECTS, MAJOR DAMAGE AND DECAY CAN BE USED
AS AVAILABLE.
OP
SUBMITTAL REQUIREMENTS:
1.
KEY LOGS: NA
2. BRUSH MATTRESS: NA, EXCEPT FOR IMPORTED BED MATERIAL, WHICH REQUIRES SUBMITTAL APPROVAL. INCLUDE
PHOTOS OR SAMPLE FROM QUARRY/MATERIAL SUPPLIER PRIOR TO DELIVERY
3. BOULDERS: SUBMITTAL APPROVAL REQUIRED. INCLUDE PHOTOS OR SAMPLE FROM QUARRY/MATERIAL SUPPLIER
PRIOR TO DELIVERY
4. WOOD POSTS: SUBMITTAL APPROVAL REQUIRED IF IMPORTED
INSPECTION REQUIREMENTS:
1. CONTRACTOR SHALL PERFORM INITIAL QC ON ALL MATERIALS.
2. ENGINEER/DESIGNATED SPECIALIST TO VISUALLY INSPECT AND PROVIDE FINAL ACCEPTANCE OF EACH STRUCTURE
BASED ON SITE INSPECTOR OR CONTRACTOR PROVIDED DOCUMENTATION (PHOTOS, ELEVATIONS).
B-AXIS
(WIDTH) —| f-
BOULDER DIMENSIONS (FT) (¢ 0.25 FT) ener KS)
BOULDER TYPE | A-AXIS | B-AXIS | C-AXIS ity
CLUSTER BOULDER | 2.0 15 15 rt
BOULDER AXIS | NOT TOscate
CLIENT
GRAHAM BOARDMAN
GREENVEST LLC
4201 NORTHVIEW DRIVE
SUITE 202
BOWIE, MD 20716
DATE: 02052028 ISSUES/ REVISIONS
SEMI-FINAL
DESIGN
CONNECTICUT
COLLEGE
GreenVest
VISION « PERFORMANCE > RESULTS
“=Biohabitats
‘The Stables Building 2081 Clipper Park Road
Baltimore, MD 21211 / ph: 410.554.0156
fx: 410.554.0168 / www:biohabitats.com
Restore ihe Earth & Inspire Beolgieal Stovardstip
MAMACOKE BROOK
OUTFALL CHANNEL
STABILIZATION AND
RESTORATION
m MIDDLE
RESTORATION
REACH DETAILS
PROIESTNO, 5201.01 | = NTS
NOT TO SCALE
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27 OF 42
FORE A FORTS Nea Ie) SENET UU SOIENS FUBROEORS SNSRED: FERIOERUE DCAD OT MANE Reuse of Documents: This document, and the ideas and designs incorporated herein, as an instrument of Professional Service, is the property of Biohabilals, Inc. and is not to be used in whole or in part, for any other project without the vaitten authorization of Biohabilats, Inc.

TYPICAL CUT SCENARIO
NORMAL WATER
SURFACE ELEVATION
GRADE UPPER BANKS TO
MAX SLOPE OF 3:1 AND
STABILIZE WITH 700 SERIES
SOIL STABILIZATION MATTING
(SEE DETAIL FOR EXTENTS
CENTERLINE
BOULDER
CLUSTER
EXCAVATE
HIGH POINTS.
ALONG TOP CHANNEL FILL
OF BANK MATERIAL LIMITS/
DEPTH VARIES
SECTION VIEW (TYPICAL)
|
ae
9
=|
LOCATION/EXTENT Pe
AS Yh if
SHOWN
ON j \\
PLANS f
ORAS VC;
DIRECTED ( WY
BRANCHES TO EXTEND LATERALLY |
FROM STREAM BANK TO POOL.
INVERT / CENTERLINE (CL)
PLAN VIEW (TYPICAL)
POOL WOOD/BOULDER CLUSTER TREATMENT
TYPICAL FILL SCENARIO
KEY WOODY ELEMENTS (BRANCH
BUNDLE, COARSE WOOD) INTO
BED OR BANK A MINIMUM OF 2 FT
MAINTAIN 12 INCHES
_OF COVER ABOVE
| KEYED IN PORTIONS.
OF BRANCHES.
BRANCH BUNDLE
COARSE WOOD.
THE RUN AND GLIDE OF UP AND
DOWNSTREAM STRUCTURES SHALL BE
STABILIZED WITH RIFFLE BED MATERIAL
INSTALLED TO THE THICKNESS SHOWN
ON THE PROFILE AND DETAIL.
TOP OF BANK ELEV.
BOULDER CLUSTERS
COARSE WOOD
EACH BRANCH BUNDLE
PLACEMENT SHALL INCLUDE
A DENSE MATRIX OF BRANCH
MATERIAL FOR LENGTH
SPECIFIED EXTENDING INTO
POOL FOR COMPLEX OVER
AQUATIC HABITAT.
ANGLE BRANCHES TO
FACE SLIGHTLY
UPSTREAM TOWARD
FLOW DIRECTION
POOL WOOD/BOULDER CLUSTER TREATMENT EXECUTION:
INSTALL POOL WOOD/BOULDER CLUSTER TREATMENT AT POOL LOCATIONS SHOWN ON THE GRADING PLAN, OR AT
DIRECTION OF ENGINEER BASED ON AVAILABLE WOODY MATERIAL. EACH TREATMENT SHALL INCLUDE A MINIMUM OF
TWO BRANCH BUNDLE COMPLEXES, TWO COARSE WOOD ELEMENTS AND TWO BOULDER CLUSTERS, UNLESS OTHERWISE
DIRECTED BY ENGINEER.
HARVEST WOODY MATERIAL ON-SITE THAT COMPLIES WITH THE MATERIAL SPECIFICATIONS. HARVEST MATERIAL AS
PART OF THE CLEARING, TREE SALVAGING, AND HABITAT MATERIAL SALVAGING AND STOCKPILING OPERATIONS ONSITE,
LEAVING AS MUCH OF THE BRANCHING AND ROOT FAN INTACT AS POSSIBLE. MATERIALS SHALL BE HANDLED AND
STORED IN A MANNER SO AS TO MINIMIZE DAMAGE TO BRANCHING AND ROOT FANS.
INSTALL BRANCH BUNDLES AND COARSE WOOD AS SHOWN. GENERAL ORIENTATION IS BRANCHING/ROOT WAD FACING
UPSTREAM BUT MULTIPLE CONFIGURATIONS IS DESIRABLE. ENSURE WOODY ELEMENTS (BRANCH BUNDLE, COARSE
WOOD) ARE KEYED INTO BED OR BANK A MINIMUM OF 2 FT AND THAT BRANCHING DOES NOT EXTEND MORE THAN 0.5 FT
ABOVE THE NORMAL WATER SURFACE ELEVATION OF THE POOL.
WHERE POSSIBLE, ALL MATERIAL SHALL BE DRIVEN OR PUSHED INTO THE BED AND BANKS TO DEPTHS SPECIFIED WITH
MINIMAL EXCAVATION. SHARPEN ENDS OF LOG AND DRIVE SHARPENED INTO GROUND.
ALL EXPOSED LOG ENDS SHALL HAVE BROKEN OR ROUGHENED END, RATHER THAN SAW CUT END WHEN POSSIBLE.
INSTALL BOULDER CLUSTERS AS SHOWN, WITH A MINIMUM OF TWO CLUSTERS PER POOL TREATMENT. EACH BOULDER
SHALL BE PARTIALLY BURIED BELOW FINISHED GRADE A MINIMUM OF 14 FT, AND EXTEND ABOVE FINISHED GRADE A
MINIMUM OF 1 FT.
BACKFILL AROUND WOODY ELEMENTS AND BOULDER CLUSTERS WITH CHANNEL FILL MATERIAL AS NEEDED TO MEET
POOL GRADES SHOWN ON PROFILE.
ONCE A POOL BRANCH TREATMENT IS CONSTRUCTED, IMMEDIATELY STABILIZE ALL DISTURBED TIE-IN LOCATIONS AS.
SPECIFIED.
THIS DETAIL DEPICTS THE TYPICAL PREFERRED COMPOSITION AND CONFIGURATION OF POOL WOOD AND BOULDER
CLUSTER ELEMENTS. ALTERATION OF THIS COMPOSITION/CONFIGURATION DUE TO ISSUES OBTAINING NECESSARY
MATERIALS OR OTHER REASON IS ACCEPTABLE ONLY WITH PRIOR APPROVAL FROM THE ENGINEER/DESIGNATED
SPECIALIST. FINISHED GRADE OF ALTERED STRUCTURES SHALL REMAIN AS SPECIFIED ON THE PLANS.
ROCK FORD / STEPPING STONE MODIFICATION:
2
3.
FOR LOCATION WHERE THE TRAIL CROSSES THE CHANNEL AT A PROPOSED RIFFLE, THE CONFIGURATION OF RANDOM
BOULDERS AND RIFFLE WOOD SHALL BE MODIFIED TO ALLOW RIFFLE TO BE USED AS BOTH ROCK FORD FOR VEHICULAR,
CROSSINGS AND PEDESTRIAN CROSSING
ROCK FORD MODIFICATION - RANDOM BOULDERS AND RIFFLE WOOD SHALL BE INSTALLED FLUSH WITH RIFFLE BED
MATERIAL. TRANSITION RIFFLE MATERIAL UP SIDESLOPES TO ENSURE STABLE CROSSING.
STEPPING BOULDERS - SEE STEPPING BOULDER DETAIL FOR INSTALLATION
POOL WOOD/BOULDER CLUSTER TREATMENT MATERIALS:
1.
CHANNEL FILL MATERIAL SHALL BE COMPOSED OF 80% IMPORTED OR ON-SITE SALVAGED MATERIAL MIXED WITH 20%
HARDWOOD MULCH BY VOLUME. IMPORTED MATERIAL SHALL CONSIST OF SAND, LOAMY SAND, SANDY LOAM AND LOAM
TEXTURES, AS DEFINED BY USDA. MATERIAL GRADATION SHALL BE UP TO 20% CLAY (<0.002 MM) UP TO 50% SILT (0.002 MM
TO 0.05 MM), 30% TO 100% SAND (0.05 MM TO 2.0 MM), AND UP TO 5% GRAVEL (2.0MM TO 2.0 IN). SALVAGED MATERIAL.
SHALL ONLY BE GENERATED FROM APPROVED ON-SITE GRADING ACTIVITIES AND MEET THE SPECIFICATIONS FOR
IMPORTED MATERIAL. HARDWOOD MULCH SHALL CONSIST OF NATURAL UNCOMPOSTED WOOD AND BARK FROM
HARDWOOD TREES THAT HAVE BEEN MILLED TO A MINIMUM PARTICLE SIZE OF 1 X 1/2 X 1/4 INCH AND MAXIMUM PARTICLE
SIZE OF 4 X 4 X 2 INCH WITH LESS THAN 20% SAWDUST.
COARSE WOOD SHALL BE COMPOSED OF LIMBS, TRUCKS, OR ROOTWADS BETWEEN 12 AND 24 INCHES DIAMETER, CUT TO
ALENGTH OF APPROXIMATELY 4 TO 6 FT.
BRUSH BUNDLES SHALL BE COMPOSED OF BRUSH AND SMALL LIMBS BETWEEN 2" TO 4" DIAMETER AND 3 TO 6 FOOT
LONG WITH COMPLEX BRANCHING. MATERIAL TO 8E TIGHTLY BUNDLED TOGETHER INTO BUNDLES OF APPROXIMATELY 2
FT DIAMETER PRIOR TO INSTALLATION.
BOULDERS SHALL MEET THE DIMENSIONS PROVIDED ON THIS DETAIL. BOULDERS SHALL BE SUBANGULAR MATERIAL AND
MATCH THE APPEARANCE/COMPOSITION OF MATERIALS NATIVE TO THIS AREA (E.G. GLACIAL FLUVIAL AND TILL
DEPOSITS). ANGULAR RIP RAP MATERIAL WITH SHARP EDGES IS NOT ACCEPTABLE,
ALL WOODY MATERIAL SHALL BE OBTAINED ONSITE TO MAXIMUM EXTENT POSSIBLE. ROT-RESISTANT SPECIES ARE
PREFERRED FOR USE IF AVAILABLE. BUT ANY WOOD FREE OF DEFECTS, MAJOR DAMAGE AND DECAY CAN BE USED AS
AVAILABLE.
SUBMITTAL REQUIREMENTS:
PEN
CHANNEL FILL MATERIAL: SUBMITTAL APPROVAL REQUIRED. INCLUDE PHOTOS OR SAMPLE FROM QUARRY/MATERIAL
SUPPLIER PRIOR TO DELIVERY
COARSE WOOD: NA
BRUSH BUNDLES: NA
BOULDERS: SUBMITTAL APPROVAL REQUIRED. INCLUDE PHOTOS OR SAMPLE FROM QUARRY/MATERIAL SUPPLIER PRIOR
TO DELIVERY
INSPECTION REQUIREMENTS:
1.
2.
CONTRACTOR SHALL PERFORM INITIAL QC ON ALL MATERIALS.
ENGINEER/DESIGNATED SPECIALIST TO VISUALLY INSPECT AND PROVIDE FINAL ACCEPTANCE OF EACH STRUCTURE
BASED ON SITE INSPECTOR OR CONTRACTOR PROVIDED DOCUMENTATION (PHOTOS, ELEVATIONS).
B-AXIS
C-AXIS
BOULDER DIMENSIONS (FT) (+ 0.25 FT) Saf (HEIGHT)
A-AXIS
BOULDER TYPE AAXIS | B-AXIS | C-AXIS ase
CLUSTER BOULDER 2.0 15 15
_ AXIS & NOT TO SCALE
CLIENT
GRAHAM BOARDMAN
GREENVEST LLC
4201 NORTHVIEW DRIVE
SUITE 202
BOWIE, MD 20716
DATE: 02062026 _ISSUES/ REVISIONS
SEMI-FINAL
DESIGN
CONNECTICUT
COLLEGE
GreenVest
VISION « PERFORMANCE » RESULTS
yeBiohabitats
‘The Stables Building 2081 Clipper Park Road
Baltimore, MD 21211 / ph: 410.554.0156
fx: 410.554.0168 / wwycbiohabitats.com
Restore she Eearth & Inspire Ecolrgival Stewardship
MAMACOKE BROOK
NOT TO SCALE
OUTFALL CHANNEL
STABILIZATION AND
RESTORATION
a MIDDLE
RESTORATION
REACH DETAILS
26 OF 42
2787 ROLE GaNCADO POET ESOL OT COBAECUCUE College MUMACOKE Sirem FesToration\CAD Frans \aUOTmT ays
Reuse of Documents: This document, and the ideas and designs incorporated herein, as an instrument of Professional Service, is the property of Biohabitats, Inc. and is not to be used in whole or in part, for any other project without the written authorization of Biohabitats, Inc.

PROVIDE 2” X 2" X 4‘ HARDWOOD STAKES AT 5 FT 0.C
ACROSS FLOODPLAIN; TOP OF POSTS TO EXTEND 6
INCHES ABOVE TOP OF WATTLE
S
y NIRAIZ INI KZ IRINA NIKAIZKIRK
RRAAKARAAKANAAINAAAANAAIANRARAALARA
POSTS TO EXTEND 6" FLOW ——>
ABOVE WATTLES
EXISTING
GROUND
10' LONG, 12" DIAMETER
WATTLES
TRENCH GROUND BELOW WATTLE
APPROX 6" DEEP. KEY WATTLE IN
BELOW GRADE AND BACKFILL
30°
REPOSITION EXISTING FALLEN
LOGS/BRANCHES ACROSS
FLOODPLAIN AND FLOW PATHWAYS .
WIDTH AND DEPRESS INTO SOIL SURFACE
EXISTING FLOWPATH CENTERLINE
(MULTIPLE FLOW PATHWAYS MAY
BE PRESENT)
INSTALL 2" X 2" X 4"
HARDWOOD
STAKES AT 5 FT
O.C, BOTH SIDES
12-INCH
DIAMETER
WATTLE
4-INCH DIA POST
BRUSH MATTRESS TAILOUTS ON THE UP AND DOWNSTREAM SIDE OF*
WATTLE EXTENDING ONE CHANNEL WIDTH IN BOTH DIRECTIONS TO/
DISSIPATE ENERGY IN CHANNEL. BRUSH MATTRESS SHALL SPAN PAST
!
WHEN CROSSING AN EXISTING DEFINED FLOWPATH CHANNEL, INSTALL ;
EXISTING CHANNEL TOP WIDTH A MINIMUM OF 5' AND BE STAKED IN PLACE?
WITH 4-INCH DIAMETER POSTS, 2.5 FT ON-CENTER, WITHIN THE.FLOWPATH.
KEY WATTLE INTO
GROUND 6" MIN.
2" POSTS TO
EXTEND INTO
GROUND 18" MIN.
PLAN
POST AND WATTLE
POST AND WATTLE EXECUTION:
1.
INSTALL POST AND WATTLE STRUCTURES AT LOCATIONS AND ELEVATIONS SHOWN ON PLAN AND PROFILE, OR AS
DIRECTED BY ENGINEER/DESIGNATED SPECIALIST.
2. HARVEST WOODY MATERIAL ON-SITE THAT COMPLIES WITH THE MATERIAL SPECIFICATIONS. HARVEST MATERIAL AS
PART OF THE CLEARING, TREE SALVAGING, AND HABITAT MATERIAL SALVAGING AND STOCKPILING OPERATIONS
ONSITE, LEAVING AS MUCH OF THE BRANCHING AND ROOT FAN INTACT AS POSSIBLE. MATERIALS SHALL BE HANDLED
AND STORED IN A MANNER SO AS TO MINIMIZE DAMAGE TO BRANCHING AND ROOT FANS,
3. HAND EXCAVATE A SHALLOW 5" DEPTH TRENCH ACROSS THE