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T
OVERHILL DRIVE
40' R/W
IPF
IPF
34" OAK#69
30" OAKDEAD
BAMBOOTHICKET
10
20
30
40
50
52
52
50
CHAIN LINKFENCE
GRAVEL
BENCHMARKMAGNAIL
ELEV.= 52.4'
BENCHMARKMAGNAIL
ELEV.= 52.2'
25' STEEPSLOPES BUFFER
CPF
CPF
AsE
HSG CAuD
HSG CLOT 24R - BLOCK I
HOLLY HILL HARBORPLAT BOOK 204, PAGE 10
NOW OR FORMERLYLANDS OF
DONALD DILKSDEED BOOK 7572 PAGE 268
AREA = 21,010 SQ. FT. ±OR 0.482 ACRES ±
LOT 25R - BLOCK IHOLLY HILL HARBOR
PLAT BOOK 204, PAGE 10NOW OR FORMERLY
LANDS OFROBERT A. MALOOF, JR.
SUSAN A. MALOOFDEED BOOK 31173 PAGE 308
LOT 23 - BLOCK IHOLLY HILL HARBOR
PLAT BOOK 69, PAGE 43NOW OR FORMERLY
LANDS OFROBERT ALEXANDER KLEMKO
DANA MICHELLE JACKELDEED BOOK 35638 PAGE 483
LOT 15 - BLOCK IHOLLY HILL HARBOR
PLAT BOOK 69, PAGE 43NOW OR FORMERLY
LANDS OFCHARLES R. STEPHAN
ANN M. STEPHANDEED BOOK 9439 PAGE 744
PARCEL 529
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
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EX. HOUSE
EX. HOUSE
MH #300175
N 25
°04'
40" E
170
.77'
S 58°36'24" E 100.63'
S 25
°07'
09" W
215
.08'
N 67°04'28" W 35.49'
CH
D=N
30°41' 2 8"W
59 .32'
L=63.50'R
=50 .00'
CHD=N 08°15'33" W 27.94'L=28.22' R=58.00'
LDA/R2
BUFFER MODIFIED AREA
WAA-74-2702
40
30
20
12
14
16
18
30' B.R.L.
7' B.
R.L.
7' B.
R.L.
25' B.R.L.
PR. 2-STORY DWELLINGFOOTPRINT: 1,500 SF
FFE = 49.00GFE = 48.33BFE = 39.00
SS
SS
SS
40
30'
40'
22'
11.6'
31.5
'
GP
40
PR. DRIVEWAY
48.67
48.33
39.00
42.00
48.33
35
C/O
42'12'
32.9'
PR.WELL
TIE IN TO EX. PUBLICLOW-PRESSURE
SEWER FORCE MAIN
DEAD TREET.B.R.
PR. SWM FACILITYLINED RAIN GARDEN
PR. MECHANICALLYSTABILIZED EARTHVEGETATED SLOPE
PR. SEWERSERVICE
PR. LEAD WALK
EX. TREETO REMAIN
PR. 12 X 20 CANTILEVERDRIP-THROUGH DECK
PR. TRENCH DRAIN
PR. GRINDER PUMP15 X 15 PUBLICUTILITY EASEMENT
52
51
50
49
30.4'
10'
15'
122.
8'
46.50
45
45
STABILIZED RAINGARDEN OUTFALL
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LODLO
D
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
48
50
51
5049
48
PR. VEGETATED BERMBERM LENGTH = 50'
CREST WIDTH = 2'SIDE SLOPES = 3:1
W
50.47
18'
T
OVERHILL DRIVE
40' R/W
34" OAK#69
30" OAKDEAD
40
50
52
52
50
GRAVEL
BENCHMARKMAGNAIL
ELEV.= 52.4'
25' STEEPSLOPES BUFFER
CPF
CPF
FM
FM
FM
FM
FM
FM
FM
N 67°04'28" W 35.49'
CH
D=N
30°41' 2 8"W
59 .32'
L=63.50'R
=50 .0 0'
CHD=N 08°15'33" W 27.94'L=28.22' R=58.00'
WAA-74-2702
40
30
SS
SS
SS
40
30'
40'
22'
11.6'
31.5
'
GP
40
48.67
48.33
39.00
42.00
48.33
35
C/O
42'12'
32.9'
52
51
50
49
30.4'
10'
15'
46.50
45
45
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LODLO
D
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
48
50
51
5049
48
W
50.47
18'
3 VA1 CV
4 VA1 CC
4 VA
1 VA
7 CA
5 CA
1 CC
1 CC5 IV
2 IV
1 CV
1 CC
1 CV
5 IV
MD
STA
TE P
LAN
E N
AD 8
3
0'GRAPHIC SCALE
1 inch = ft.20
60'40'20'
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INFORMATION STATEMENT
1a. DEVELOPER/APPLICANT 1b. OWNER 1c. DESIGN CONSULTANTTHREE RIVERS BUILDERS, LLC DONALD DILKS MCCRONEC/O MIKE CRAMER C/O WILLIAM WARNOCK, P.E.8338 VETERANS HWY #204A 2746 SOLOMONS ISLAND RD 20 RIDGELY AVENUEMILLERSVILLE, MARYLAND 21108 EDGEWATER, MD 21037 ANNAPOLIS, MARYLAND 21401(443) 758-8265 (410) [email protected] BWARNOCK@MCCRONE-
ENGINEERING.COM2. BENCHMARK DATA (MARYLAND STATE PLANE NAD 83 - NAVD88)
GENERAL NOTES
SITE AREA: 21,027 SQ. FT. OR 0.483 AC. ±
1. EXISTING ZONING: R2 RESIDENTIAL
2. TOTAL AREA WITHIN THE LIMIT OF DISTURBANCE: 12,637 SQUARE FEET OR 0.290 ACRES±
3. DATUMTHE COORDINATES SHOWN HEREON WERE ESTABLISHED USING CONVENTIONAL AND GPS OBSERVATIONS BASED ON THE MARYLANDCOORDINATE SYSTEM NAD83 (2011) DATUM, USING TRIMBLE'S REAL-TIME KEYNET GPS AND VIRTUAL REFERENCE STATION SYSTEM (VRS).
4. BOUNDARYTHE BOUNDARY LINES SHOWN HEREON ARE THE RESULT OF A BOUNDARY SURVEY PERFORMED BY MCCRONE IN APRIL 2021.
5. TOPOGRAPHYTHE TOPOGRAPHY SHOWN WITHIN THE PROPERTY BOUNDARY HEREON IS BASED UPON UPON A FIELD RUN SURVEY BY MCCRONE FROMAPRIL 2021. THE FIELD RUN TOPOGRAPHY IS SUPPLEMENTED WITH ANNE ARUNDEL COUNTY 2-FOOT CONTOURS BEYOND THE SUBJECTPROPERTY BOUNDARY LINE AS NECESSARY.
6. LOCATIONTHE LOCATION SHOWN HEREON IS BASED UPON A FIELD-RUN SURVEY PERFORMED BY MCCRONE IN APRIL 2021.
7. CRITICAL AREATHE PROPERTY IS LOCATED WITHIN IN THE CRITICAL AREA WITH A LIMITED DEVELOPMENT AREA (LDA) DESIGNATION.
8. CRITICAL AREA BUFFERTHE CRITICAL AREA BUFFER IN THE VICINITY OF THE SITE IS CLASSIFIED AS "MODIFIED BUFFER" ACCORDING TO ANNE ARUNDEL COUNTYPLANNING AND ZONING RECORDS. § 18-13-104 (c) OF THE COUNTY CODE ESTABLISHES THE BUFFER AS 100' FROM THE MEAN HIGH WATERLINE WITHOUT ANY BUFFER EXPANSION.
9. WETLANDSTHERE ARE NO WETLANDS LOCATED ON THE SITE.
10. BOG PROTECTION AREATHERE ARE NO BOG AREAS LOCATED ON THE SITE.
11. FEMA FLOODPLAINPER 24003C0244F, MAP EFFECTIVE 2/17/2015, THE SITE IS LOCATED IN ZONE X, AREAS DETERMINED TO BE OF MINIMAL FLOOD HAZARD.
12. UTILITIESWATER SERVICE: PRIVATE WELLSEWER SERVICE: PUBLIC SEWER, GRINDER PUMP
VICINITY MAPSCALE: 1" = 2000'
MD
STA
TE P
LAN
E N
AD 8
3
SITE
VAR
IAN
CE
SITE
PLA
N
IMPERVIOUS COVERAGE CALCULATIONS§17-8-402
TOTAL SITE AREA: 0.483 ACRES
21,027 SQUARE FEET
IMPERVIOUS COVERAGES
EXISTING COVERAGE: 0.0 ACRES
0 SQUARE FEET
PROPOSED COVERAGE: 0.061 ACRES
2,652 SQUARE FEET
ALLOWED COVERAGE PER §17-8-402(b)(1): 0.151 ACRES
6,571 SQUARE FEET
ALLOWED COVERAGE NOT UTILIZED: 0.090 ACRES
3,919 SQUARE FEET
RATIO OF COVERAGE TO TOTAL AREA
EXISTING: 0.0 %
PROPOSED: 12.61 %
ALLOWED PER §17-8-402(b)(1): 31.25 %
FOREST CLEARING CALCULATIONS§17-8-601(a)(1)
TOTAL SITE AREA: 0.483 ACRES
21,027 SQUARE FEET
LOT HAS AREA <0.5 ACRES
LOT WAS CREATED BEFORE DECEMBER 1985
EXISTING FOREST COVERAGE: 0.483 ACRES
21,027 SQUARE FEET
PROPOSED CLEARING: 0.150 ACRES
6,523 SQUARE FEET
ALLOWED CLEARING PER §17-8-601(a)(1): 0.150 ACRES
6,534 SQUARE FEET
FOREST TO BE RETAINED: 0.333 ACRES
14,504 SQUARE FEET
X X
EXISTING
IRON PIPE FOUND
IRON ROD FOUND
CONTROL POINT
SEWER CLEANOUT
UTILITY POLE
WATER VAULT
WELL
BOUNDARY LINE
BUILDING OUTLINE
BUILDING OVERHANG/AWNING
FENCE LINE
TREELINE
CONCRETE WALK/PAD
STEEP SLOPES >15%
25' STEEP SLOPE BUFFER
CPT 107
C/O
358380
W
W
IRFIPF
PROPOSED
MAJOR CONTOUR
MINOR CONTOUR
55
54
55
54
---
---
---
---
---
---
---
---
---
LEGEND
SOIL TYPE BOUNDARYUz
HSG DSOIL TYPE &
HYDROLOGIC SOIL GROUP
---
---
---
---
---
GRAVEL/PAVED DRIVEWAY
---
TREES > 12" IN DIAMTER 22" TREE
CRITICAL AREA 100' BUFFER
---
W
STORMWATER ESDv SUMMARY TABLE
PRACTICE AREA TREATED ESDv (CF)
RAIN GARDEN DRIVEWAYLEAD WALK 151
PLANTINGS ROOF AREA 150
TOTAL ESDv 301
EASEMENT LINE ---
SEWER HOUSE CONNECTION SS
SEWER FORCE MAIN ---FM
STEEP SLOPE SUMMARY TABLE§17-1-101(91)
TOTAL SITE AREA: 21,027 SQUARE FEET
TOTAL AREA WITHIN R-2 SETBACKS 12,731 SQUARE FEET
>15% STEEP SLOPE AREAS:
ON SITE: 16,097 SQUARE FEET
76.6 % COVERAGE
WITHIN R-2 SETBACK LINES: 12,032 SQUARE FEET
94.5 % COVERAGE
<15% SLOPE AREAS:
ON SITE: 4,930 SQUARE FEET
23.4 % COVERAGE
WITHIN R-2 SETBACK LINES: 699 SQUARE FEET
5.5 % COVERAGE
R2 (RESIDENTIAL DISTRICT) ZONING BULK REGULATIONS§ 18-4-601 PROVIDED
REQUIRED SITE
MINIMUM LOT SIZE (NOT SERVED BY PUBLIC SEWER) 20,000 SQUARE FEET 21,027 SQUARE FEET
MAXIMUM COVERAGE BY STRUCTURES AND PARKING CRITICAL AREA COVERAGE LIMITS PER CODE §17-8-402 APPLY (31.25%) 13.5%
MINIMUM WIDTH AT FRONT BUILDING RESTRICTION LINE 80 FEET 99 FEET±
MINIMUM SETBACKS FOR PRINCIPAL STRUCTURES:
FRONT LOT LINE 30 FEET 33 FEET±
REAR LOT LINE 25 FEET 123 FEET ±
SIDE LOT LINES 7 FEET 12 FEET±
MINIMUM SETBACKS FOR ACCESSORY STRUCTURES
FRONT LOT LINE 40 FEET NONE PROPOSED
SIDE AND REAR LOT LINE 7 FEET OR, FOR STRUCTURES LESS THAN 8 FEET IN HEIGHT, 5 FEET NONE PROPOSED
MAXIMUM HEIGHT LIMITATIONS:
PRINCIPAL STRUCTURES 35 FEET 29.25 FEET
ACCESSORY STRUCTURES 25 FEET OR THE HEIGHT OF THE PRINCIPAL STRUCTURE(LESS) NONE PROPOSED
MAXIMUM NET DENSITY:
IF NOT SERVED BY PUBLIC SEWER ONE DWELLING PER 20,000 SQUARE FEET SERVED BY PUBLIC SEWER
STORMWATER MANAGEMENT NARRATIVE
THE EXISTING ENVIRONMENTAL FEATURES AND SITE CONSTRAINTS MAKE IT IMPRACTICABLE TO ENTIRELY ADDRESS THE STORMWATER REQUIREMENTS FORTHE PROJECT UTILIZING TYPICAL STORMWATER BEST MANAGEMENT PRACTICES. A SINGLE RAIN GARDEN FACILITY IS PROPOSED IN THE FRONT YARD TO TREATTHE NEW DRIVEWAY AND LEAD WALK. THE REMAINING ROOF AREA (1,500 SF) REQUIRES PLANTINGS TO BE USED AS A TREATMENT ALTERNATIVE AS NO OTHERACCEPTED PRACTICE IS FEASIBLE. THE FEATURES AND CONSTRAINTS CREATING THE HARDSHIP ARE MAINLY STEEP SLOPES, UTILITY SETBACKS, AND ANNEARUNDEL COUNTY CODE LIMITS ON FOREST CLEARING PER §17-8-601(a)(1).
STORMWATER BEST MANAGEMENT PRACTICES, BOTH STRUCTURAL AND NON-STRUCTURAL, TYPICALLY REQUIRE EITHER A 25' SETBACK FROM STEEP SLOPES>25%, PARTICULARLY FOR INFILTRATION DEVICES SUCH AS MICRO-BIORETENTIONS, RAIN GARDENS, DRY WELLS, AND FILTERING FACILITIES. THE 25' BUFFEROFFSET FROM EXISTING AND PROPOSED SLOPES >15% LEAVES AN AREA OF ONLY ±800 SF FOR STORMWATER MANAGEMENT DEVICES, THAT IS LESS THAN 100SF AFTER ACCOUNTING FOR UTILITY SETBACKS. EVEN WITHIN THAT REMAINING 100 SF, A STORMWATER PRACTICE CANNOT BE PLACED IN A LOCATION TOCAPTURE ANY OF THE PROPOSED IMPERVIOUS AREA (I.E. THE FACILITY WOULD BE UPSTREAM OF THE SURFACES TO BE TREATED). ONLY A SINGLE RAINGARDEN FACILITY CAN BE PLACED IN THIS ±800 SF AREA GRANTED THAT NO STONE IS USED AND THE FACILITY DOES NOT INFILTRATE. THIS PRACTICE HAS THECAPACITY TO TREAT SOME IMPERVIOUS AREA, BUT IS LIMITED.
ANOTHER TYPICAL SLOPE LIMITATION IS THAT RELATING TO THE CONTRIBUTING/DISCHARGE SLOPE. NON-STRUCTURAL PRACTICES, SUCH AS DISCONNECTS,SHEETFLOW TO CONSERVATION AREAS, LANDSCAPE INFILTRATION, AND FILTER BERMS REQUIRE GENTLE SLOPES OF <5%, WHICH ARE NOT FEASIBLE ON THESITE TO TIE IN TO EXISTING GRADING. EVEN UTILIZING LEVEL SPREADERS TO PROMOTE SHEET FLOW ARE LIKELY TO FAIL WHEN CONTRIBUTING SLOPES ARE INEXCESS OF 25%. SURFACE DISCHARGE FROM RAINWATER HARVESTING WOULD NOT BE FEASIBLE ON STEEP SLOPES. SIMILARLY, 4% SLOPE LIMITATIONS TOEMPLOY BIO-SWALES OR TIERED RAIN GARDEN FACILITIES WOULD BE EXCEEDED ON THE SITE.
PRIVATE WATER AND PUBLIC SEWER UTILITIES ARE PROPOSED WITH THE PROJECT, REQUIRING THAT AN INFILTRATING STORMWATER DEVICE BE GREATERTHAN 50' FROM THE WATER SUPPLY, 25' FROM THE GRINDER PUMP, AND 10' FROM UTILITY PIPING. THE PROPOSED RAIN GARDEN IS LESS THAN 50' FROM THEPROPOSED PRIVATE WELL. HOWEVER, IT WILL NOT BE AN INFILTRATING FACILITY, AS IT WILL HAVE AN UNDERDRAIN; LINER, AND DISCHARGE OVERFLOWCONVEYED AT A NON-EROSIVE VELOCITY TO A STABLE OUTFALL. ALL OTHER LOCATIONS THAT ARE OUTSIDE OF THE STEEP SLOPES BUFFER WOULD VIOLATEONE OF LISTED REQUIRED UTILITY SETBACKS.
CLEARING IN THE CRITICAL AREA LIMITED DEVELOPMENT AREA FOR A LOT OF THIS SIZE IS NOT TO EXCEED 6,534 SF; THAT MAXIMUM WILL NOT BE EXCEEDED INTHE PROPOSED SITE LAYOUT. IN ORDER TO REMEDY THE SLOPE CONSTRAINTS AND/OR UTILITY SETBACKS, MORE EXISTING FOREST MUST BE CLEARED. SINCETHE CLEARING WILL NOT BE PERMITTED UNDER §17-8-601(a)(1), NO SPACE ON THE SITE REMAINS FOR ANY ADDITIONAL STORMWATER BEST MANAGEMENTPRACTICES BEYOND THE SINGLE RAIN GARDEN PROPOSED. NATURAL RESOURCES WILL BE PROTECTED TO THE MEP AND NATURAL FLOW PATTERNS WILL BEMAINTAINED.
THE REMAINING 1,500 SF OF IMPERVIOUS AREA IS PROPOSED TO BE TREATED WITH PLANTINGS AS ALL OTHER TREATMENT OPTIONS HAVE BEEN EXHAUSTED.STORMWATER MANAGEMENT PLANTINGS WOULD BE PROVIDED AT A RATE OF 1 TREE OR 3 SHRUBS PER 100 SF OF PROPOSED IMPERVIOUS AREA. THECALCULATION OF THE REMAINING ESDv YIELDS A REQUIREMENT TREATMENT EQUAL TO ±1,900SF. THIS IS EQUIVALENT TO APPROXIMATELY 11 TREES AND 24SHRUBS, OR A VARIABLE PLANTING COMBINATION OF THE TWO.
STORMWATER MANAGEMENT PLANTING REQUIRED = 1,900 SQUARE FEET= 1 TREE OR 3 SHRUBS PER 100 SQUARE FEET
STORMWATER MANAGEMENT PLANTING PROVIDED = 7 TREES X 100 SF = 700 SF= 36 SHRUBS / 3 = 12 X 100 SF = 1,200 SF= 1,900 SQUARE FEET TOTAL
THE LOCATION OF TREES AND SHRUBS SHOULD BE ADJUSTED FOR EXISTING TREES.
STORMWATER MANAGEMENT PLANTING SCHEDULE
SYMBOL QUANTITY BOTANICAL NAME COMMON NAME SIZE & ROOT TYPE
CC 4 CERCIS CANADENSIS REDBUD 1" CAL., B & B
CV 3 CHIONANTHUS VIRGINICUS AMERICAN FRINGETREE 1" CAL., B & B
CA 12 CLETHRA ALNIFOLIA SUMMERSWEET 18-24" MIN., CONT.
IV 12 ITEA VIRGINICA VIRGINIA SWEETSPIRE 18-24" MIN., CONT.
VA 12 VIBURNUM ACERIFOLIUM MAPLELEAF VIBURNUM 18-24" MIN., CONT.VARIANCE SITE PLAN
SCALE: 1" = 20'
STORMWATER MANAGEMENT PLANTING PLANSCALE: 1" = 20'
