HomeMy WebLinkAbout24IWC11-375 Maple Ave-REV Site Improvement Plan Set 1-20-2524'±
20'
246
248250
250
248
246
244
242
240
23
8
236234 234
236238
240
242
252
252 252252250250248
246244
246244242240
238
236
234
232
230
228
22
0
222
224
226
228 2182
1
6
2
1
2
210
210
220
220218216
228
226
224
222
220
FLOOD ZONE AE
(FROM FIRM PANEL 09011C0334G 7/18/2011)
REGULATORY FLOODWAY
UPLAND REVIEW AREA
TP 1
TP 2
TP 8
TP 7
TP 3
TP 6
TP 4
TP 9
24'±
307 (HG D)
URBAN LAND
34B (HG A)
MERRIMAC FINE SANDY LOAM
TEST PIT DATA
TEST PITS EXCAVATED BY P&H CONSTRUCTION
AS WITNESSED BY CLA ENGINEERS (D. Hayward & B. Russo)
07/18/2024.
TP-1
Total Depth = 50"
0 - 15" Topsoil: Very dark brown, organic loam
15" - 46" Subsoil: Light gray brown loamy sand
46" - 50"Brown sand and gravel
Groundwater @ 39" (Elev.=230.3)
No ledge
Mottles @ 30" (Elev.=231.0)
TP-2
Total Depth = 87"
0 - 35" Wood chips
35" - 45" Topsoil:
45" - 73"Subsoil: Light brown-gray-green silt
73" - 83"Yellow brown fine sandy loam
83" - 87"Brown sand and gravel with pebbles
and cobbles with trace silt
Groundwater at 76" (Elev.=230.9)
No ledge
No Mottles
TP-3 (Sample taken from 25" - 73")
Total Depth = 73"
0" to 7" Topsoil: Brown fine sandy loam
7" to 25" Subsoil: Yellow brown fine sandy loam with cobbles and stones
25" to 73"Light brown, medium to coarse sand with gravel, cobbles and stones.
Firm in place.
No Groundwater
No mottles
No Ledge
TP-4
Total Depth = 51"
0" to 13" Topsoil: Dark brown silty loam
13" to 26" Subsoil: Light brown silty loam
26" to 35"Dark yellow brown sand and gravel with trace silt
35" to 51"Yellow brown coarse sand and gravel
No Groundwater
No Ledge
Mottles @ 22" (Elev. 235.3)
TP-5 - Not performed
TP-6 (Sample taken from 8" - 22")
Total Depth = 66" (Firm at bottom)
0"- 8" Topsoil: Brown silty loam
8" - 22" Subsoil: Yellow brown fine sandy loam with gravel
22" - 42" Yellow brown coarse sand and gravel with cobbles
Firm in place. Manganese staining.
42" to 66"Light brown medium sand and gravel and stones.
Groundwater @ 63" (Elev.=230.57)
No ledge
Mottles @ 33" (Elev.=233.07)
TP-7
Total Depth = 85"
0 "- 9"Topsoil: Dark brown sandy loam
9" - 21"Subsoil: Brown fine sandy loam
21" - 85"Light brown sand and gravel with cobbles and stones
(46" Manganese staining - Dense)
No Groundwater
No ledge
No Mottles
TP-8 (Sample taken at 46" - 60")
Total Depth = 86"
0 "- 16" Topsoil: Fill. Dark brown, light brown loamy sand
16" - 26"Original topsoil: Dark brown silty loam
26" - 46"Yellow brown sandy loam with cobbles and stones
46" - 60"Strong brown, light brown very fine sand
60" - 86"Gray, light brown sand and gravel with cobbles and stone
No Groundwater
No ledge
Mottles at 36" (Elev.=235.17)
TP-9 (Sample taken from 16" to 45")
Total Depth = 62"
0 "- 16" Topsoil: Very dark brown, fine sandy loam
16" - 45"Subsoil: Yellow brown fine sandy loam with cobbles and stones
45" - 62"Gray brown coarse sand and gravel with cobbles
Groundwater at 45" (Elev.=229.4)
No ledge
Mottles at 28" (Elev.=230.8)
TOWN COMMENTS101/13/25
TOWN COMMENTS201/15/25
TOWN COMMENTS301/20/25
NRCS SOIL BOUNDARY
SOIL SYMBOL (HYDROLOGICAL GROUP)
SOIL DESCRIPTION
LEGEND
UPLAND REVIEW AREA
30'
15
15
31
R =5'R=4
0'
30'
30'
24'±
240
238
242
244
238
236
2
3
4 23223022822
6
240
242
242
236
234
236234238240238
236
DD
TOWN COMMENTS101/13/25
TOWN COMMENTS201/15/25
TOWN COMMENTS301/20/25
PROPOSED DEVELOPMENT
PROVIDE NEW BITUMINOUS
CONCRETE PAVEMENT SECTION.
(TYP. SHADED AREA)
PROVIDE TOPSOIL & SEED
OVER DISTURBED AREAS
(TYP.)
PROVIDE 12' x 60' PAINTED
TRAILER PARKING SPACES
PROVIDE BIT. CONC. CURB
(DRIVEWAY CURB
RETURNS ONLY)
GRASS LINED SWALE 1A
(SEE DETAIL)STORMWATER
BASIN #1
STORMWATER BASIN #2
STOP SIGN
AREA RESERVED FOR
SNOW STORAGE
(4 SPACES)
PROVIDE BIT. CONC. CURB
LIMIT OF GRADING
(TYP.)
MATCH EXISTING
PAVEMENT
REMOVE EXISTING
BUILDING AND WELL
GRASS LINED SWALE 2
(SEE DETAIL)
MATCH EXISTING
PAVEMENT
STOP BAR
ALL DISTURBED AREAS TO BE TREATED WITH
6" OF LOAM AND SEEDED WITH NEW
ENGLAND ROADSIDE MATRIX MIX
(SEE E&S PLAN FOR DETAILS)
BASIN BOTTOM TO BE 6" OF LOAM AND SEEDED
WITH NEW ENGLAND EROSION
CONTROL/RESTORATION MIX FOR MOIST SITES
(SEE E&S PLAN FOR DETAILS)
STONE FILLED
TRENCH
(SEE DETAIL)
LEGEND
FLOOD ZONE AE
(FROM FIRM PANEL 09011C0334G 7/18/2011)
REGULATORY FLOODWAY
INSTALL 40' GUARDRAIL
CONNECT TO EXISTING GUARDRAIL
GRASS LINED SWALE 1B
(SEE DETAIL)
GRASS LINED SWALE 1C
(SEE DETAIL)
REINSTATE ROADWAY PER
TOWN OF MONTVILLE
STANDARD DETAILS
UPLAND REVIEW AREA
R =5'R=4
0'
240
238
242
244
238
236
2
3
4 23223022822
6
240
242
242
236
234
236234238240228
220222
226 224
238
236
DD
CB 'TYPE C WITH HOOD
TF=247.2±
INV IN MATCH EXIST (APPROX. 242.2)
INV OUT=(30" NE)=239.00
5' DMH
TF=238.5±
INV IN=(30" SW)=234.00
INV OUT=(36" NE)=233.01
5' DMH
TF=235.0±
INV IN=(36" SW)=230.00
INV OUT=(36" E)=230.00
234
232
234
232 232
234
234234
246
244
230232
236 236
3.0:1 3.0:13.0:1
3.0:1OUTLET
INV (36" )=229.8
SFSFSFSF
SF SFSFSF SF
3.0:162'
24'±
SEDIMENT FOREBAY 2
BOTT. ELEV. = 231.0
SEDIMENT FOREBAY 1B
BOTT. ELEV. = 231.0
SEDIMENT FOREBAY 1A
BOTT. ELEV. = 231.0
8' WIDE LEVEL SPREADER OUTLET
ELEV. = 234.0
8' WIDE LEVEL SPREADER OUTLET
ELEV. = 234.0
STORMWATER BASIN #1
BOTT. ELEV. = 231.0
STORMWATER BASIN #2
BOTT. ELEV. = 231.0
4' WIDE EARTHEN BERM
TOP ELEV. = 234.0
4' WIDE EARTHEN BERM
TOP ELEV. = 234.0
4' WIDE EARTHEN BERM
TOP ELEV. = 234.0
166' - 30" CORRUGATED HDPE PIPE
S=2.9%
173' - 36" CORRUGATED HDPE PIPE
S=1.7%
46' - 36" CORRUGATED HDPE PIPE
S=0.5%
TOWN COMMENTS101/13/25
TOWN COMMENTS201/15/25
TOWN COMMENTS301/20/25
PROPOSED TREE LINE /
CLEARING LIMITS TO
MIMIC LIMIT OF
DISTURBANCE
(TYP.)
GRASS LINED SWALE
TYP.
(SEE DETAIL)
LIMIT OF GRADING
(TYP.)
GRASS LINED SWALE
TYP.
(SEE DETAIL)
GRADE BREAK
DISPOSE EXISTING
CB AND PIPE
DISPOSE EXISTING
CB AND PIPE
'STANDARD' SIZE RIPRAP APRON
(SEE DETAIL FOR DIMENSIONS)
LEGEND
FLOOD ZONE AE
(FROM FIRM PANEL 09011C0334G 7/18/2011)
REGULATORY FLOODWAY
UPLAND REVIEW AREA
24'±DD
CB 'TYPE C
TF=247.2±
INV OUT=(30" NE)=239.00
5' DMH
TF=238.5±
INV IN=(30" SW)=234.00
INV OUT=(36" NE)=233.01
5' DMH
TF=235.0±
INV IN=(36" SW)=230.00
INV OUT=(36" E)=230.00
46' - 36" CORRUGATED HDPE PIPE
S=0.5%
OUTLET
36" HDPE FES
ELEV. =229.75
173' - 36" CORRUGATED HDPE PIPE
S=1.7%
166' - 30" CORRUGATED HDPE PIPE
S=2.9%238236240244246
232
SFSFSFSFSF SF
232
235 234
232
234
235
236SFSFSFSFSF
SF SFSF
SF SFSF
SFSF
SF
SF
SF
SF
SF
SF
SF
S
F
TOWN COMMENTS101/13/25
TOWN COMMENTS201/15/25
TOWN COMMENTS301/20/25
TEMPORARY VEGETATIVE COVER
SUGGESTED SITE PREPARATION CONSTRUCTION SEQUENCE
SEDIMENT TRAP #1
(BOTT. ELEV. =232.0)
TEMPORARY SEDIMENT TRAP NARRATIVE
LEGEND
APPROXIMATE WATERSHED SEDIMENT TRAP 1
APPROXIMATE WATERSHED SEDIMENT TRAP 2
SEDIMENT TRAP #1
(BOTT. ELEV. =232.0)
GENERAL NOTES:
1.PRIOR TO CONSTRUCTION, THE PROPOSED LIMITS OF DISTURBANCE SHALL BE STAKED BY A
LICENSED LAND SURVEYOR.
2.INLAND WETLAND BOUNDARIES SHALL BE RE-STAKED IN THE FIELD BY A LICENSED LAND
SURVEYOR OR CERTIFIED SOIL SCIENTIST PRIOR TO INSTALLATION OF EROSION AND
SEDIMENTATION CONTROL MEASURES.
3.AFTER STABILIZATION OF THE SLOPE BETWEEN BASIN #1 AND ROCKLAND POND, THE
FOLLOWING SHRUBS SHALL BE PLANTED ALTERNATELY ALONG THE EDGE OF DISTURBANCE
AT AN INTERVAL OF 10-FEET ON CENTER:10 HIGHBUSH BLUEBERRY, 10 NORTHERN
ARROWWOOD VIBURNUM, 10 RED CHOKEBERRY
INVASIVE PLANT CONTROL
1.AN ECOLOGIST/WETLANDS PROFESSIONAL WILL FLAG WOODY INVASIVES TO BE REMOVED IN THE
VICINITY OF BASIN #1 (I.E., BETWEEN THE TOP OF BERM AND ROCKLAND POND) AND WEEDY
SPECIES TO BE SPRAYED AT THE TIME OF PLAN IMPLEMENTATION, AND PREFERABLY JUST PRIOR
TO ANY EARTHWORK.
2.TARGETED, RATHER THAN BROADCAST HERBICIDE APPLICATION METHODS, SHALL BE USED. FOR
SPRING TREATMENT, CUT EARLY IN GROWING SEASON (LATE APRIL TO MID MAY) AND TREAT
SMALL RESPROUTS IN EARLY SUMMER USING A LOW VOLUME SPRAYER. IN EARLY FALL USE THE
“CUT-AND-PAINT METHOD,” APPLYING HERBICIDE TO A RECENTLY CUT STEM (WITHIN 10 MINUTES)
ON BROADLEAF INVASIVES. USE A SELECTIVE HERBICIDE LIKE TRICLOPYR (FOUND IN
BRUSH-B-GON, GARLON 3A OR 4A, AND OTHER PRODUCTS), RATHER THAN BROAD-SPECTRUM
GLYPHOSATE, TO MINIMIZE IMPACTS ON NON-TARGET PLANTS AND SOIL FAUNA. SEE NOTES ON
INVASIVE CONTROL.
3.INVASIVE PLANT CONTROL WITHIN THE AREAS OF PLANTINGS BETWEEN BASIN #1 AND THE POND
SHALL TAKE PLACE FOR TWO (2) YEARS FOLLOWING THE YEAR OF PLAN IMPLEMENTATION (I.E.,
YEARS 1 AND 2), FOLLOWING THE PROCEDURES PROMULGATED BY THE CT DEEP'S CONNECTICUT
INVASIVE PLANT WORKING GROUP (CIPWG), AND/OR THE NATURE CONSERVANCY.
4.THE ECOLOGIST/WETLANDS PROFESSIONAL WILL PREPARE A ANNUAL REPORT AND PROVIDE IT
TO THE COMMISSION BY NOVEMBER 30 OF EACH YEAR.
UPLAND REVIEW AREA
STORMWATER MANAGEMENT & POLLUTION PREVENTION PLAN
·
·
·
·
·
·
·
·
·
·
·
REQUIRED
AS
TOWN COMMENTS101/13/25
TOWN COMMENTS201/15/25
TOWN COMMENTS301/20/25