HomeMy WebLinkAboutPreliminary Plat For Alder Heights1f = 50'
0 25 50 100
DENSITY
CALCULATIONS
(PER KING COUNTY SUBDIVISION DENSITY AND
DIMENSION CALCULATIONS WORKSHEET)
ZONING DESIGNATION
R-6
SITE AREA
192,176 S.F.
= 4.4 AC.
ALLOWABLE DWELLING UNITS
26 LOTS
(KCC.21 A.12.070)
SENSITIVE AREAS (TRACT A)
43,652 S.F.
REQUIRED RECREATION SPACE
(24 LOTS x 390 S.F.)
9360 S.F.
NET BUILDABLE AREA
144,027 S.F.
= 3.19 AC.
(KCC.21 A.06.797)
MINIMUM URBAN RESIDENTIAL
DENSITY (85%)
16 LOTS
(KCC.21 A.12,060)
TRACT AREA TABLE
TRACT #
DESCRIPTION
AREA (S.F.)
A
WETLAND BUFFER
43,652
B
26' PRIVATE ACCESS
2921
C
STORM DRAINAGE/PARK
10,751
D
STORM DRAINAGE/PARK
5498
TOTAL LOT AREA 58,154 SF 1.34 AC.
LOT AREA TABLE
LOT #
AREA (S.F.)
LOT #
i AREA (S.F.)
1
7288
13
3760
2
6239
14
3948
3
5300
15
4324
4
5223
16
5485
5
4918
17
4324
6
5000
18
3948
7
5588
19
3760
8
5500
20
4042
9
5060
21
4042
10
4221
22
3780
11
4050
23
4324
12
4042
24
4700
TOTAL LOT AREA 112.866 SF 2.59 AC.
LEGAL DESCRIPTION
THAT PORTION OF THE SOUTHEAST QUARTER OF THE NORTHWEST QUARTER OF SECTION 33,
TOWNSHIP 23 NORTH, RANGE 5 EAST, WILLAMETTE MERIDIAN, IN KING COUNTY, WASHINGTON,
DESCRIBED AS FOLLOWS:
BEGINNING AT THE SOUTHEAST CORNER OF SAID SUBDIVISION;
THENCE NORTH 01'03' 14" EAST, ALONG THE EASTERLY LINE THEREOF, A DISTANCE OF 490
FEET;
THENCE NORTH 88'50'00" WEST A DISTANCE OF 415.60 FEET TO THE EASTERLY MARGIN OF
THE SEATTLE COVINGTON TRANSMISSION LINE RIGHT OF WAY;
THENCE SOUTH 15'22'40" EAST, ALONG SAID EASTERLY MARGIN, A DISTANCE OF 509.89
FEET, MORE OR LESS, TO THE SOUTHERLY L)NE OF SA)D SUBD)V)S)0N,
PRELIMINARY PLAT
FOR
ALDER HEIGHTS
A PORTION OF THE S.E. 1/4 OF THE N.W. 1/4 OF SECTION 33, TOWNSHIP 23 N., RANGE 5 E., W.M.
KING COUNTY, WASHINGTON
WETLAND Wee
WETLAND DP3 —
WETLAND'4V3B—
WELAND DP4
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SITE,
VICINITY MAP
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1. ASSESSOR'S PARCEL NUMBER: 332305-9009
2. SITE ADDRESS: 12252 SE 184TH ST., RENTON, WA 98058
3. GROSS SITE AREA: 4.4 ACRES
4. EXISTING USE: SINGLE-FAMILY RESIDENTIAL
5. PROPOSED USE: 24-LOT SINGLE-FAMILY RESIDENTIAL SUB DIVISION
6. ZONING: R-6 (URBAN RESIDENTIAL, 6 DU/AC)
7. COMPREHENSIVE PLAN DESIGNATION: URBAN MEDIUM RESIDENTIAL
8. RA-6 REQUIRED MINIMUM LOT WIDTH: 30 FEET
9. AVERAGE LOT AREA: 4689 SF
10. PROJECT DENSITY: 5.45 DU/ACRE
11. BUILDING SETBACKS:
STREET: 10 FEET
GARAGE: 20 FEET
INTERIOR: 5 FEET
12. BUILDING HEIGHT MAXIMUM: 35 FEET
13. SOIL TYPE: ALDERWOOD GRAVELLY SAND LOAM (AgB, AgD)
14. SOURCE OF BOUNDARY, TOPOGRAPHY AND WETLANDS:
FIELD SURVEYED BY BARGHAUSEN
CONSULTING ENGINEERS, INC. APRIL, 2005
UTILITIES/SERVICES:
WATER:
SODS CREEK WATER AND SEWER DISTRICT
14616 SE 192ND STREET
RENTON, WA 98058-1039
(253) 630-9900
SEWER:
SOOS CREEK WATER AND SEWER DISTRICT
14616 SE 192ND STREET
RENTON, WA 98058-1039
(253) 630-9900
POWER/GAS:
PUGET SOUND ENERGY
105 - 156TH AVENUE NE
BELLEVUE, WA 98058
1 (888) 225-5773
PHONE:
QWEST COMMUNICATIONS
PO BOX 9073
SEATTLE, WA 98111
1 (800) 244-11 1 1
FIRE:
FIRE DISTRICT #40
10828 SE 176TH STREET
RENTON, WA 98055
(425) 255-0931
SCHOOL:
RENTON SCHOOL DISTRICT NO. 403
300 SW 7TH STREET
RENTON, WA 98055
OWNER/DEVELOPER
NORRIS HOMES, INC.
2053 FABEN DRIVE
MERCER ISLAND, WA 98040
(425) 275-1901
CONTACT: JOHN NORRIS
ENGINEER/SURVEYOR/PLANNER
BARGHAUSEN CONSULTING ENGINEERS, INC.
18215 - 72ND AVENUE SOUTH
KENT, WA 98032
(425) 251-6222
FAX (425) 251-8782
CONTACT: DAN BALMELLI/R. WILLIAM \�LASSEY/IVANA HALVORSEN
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PAVEMENT WIDTH
EXISTING PAVEMENT
PRELIMINARY GRADING AND DRAINAGE PLAN
FOR
ALDER HEIGHTS
A PORTION OF THE S.E.1/4 OF THE N.W.1/4 OF SECTION 33, TOWNSHIP 23 N., RANGE 5 E., W.I.
KING COUNTY, WASHINGTON
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TO REMAIN NEW PAVEMENT
WIDENING
WIDTH - VARIES
SUBGRAD SLOP 0.�
CLASS B ASPHALT CONCRETE
CRUSHED SURFACING TOP COURSE
CRUSHED SURFACING BASE COURSE
UTILITY POLES PLACED
BACK OF SIDEWALK
SIDEWALK 1'-op) S�OpF
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CATCH BASIN &
STORM SEWERS (TYP.)
IF 12" ON`, . 4 I834 J
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(2)MAILBOXES
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VERTICLE CURB
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Dt�ICATION
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ROWER PO: E
SOUTH VAULT VOLUMES
DETENTION
CONSERVATION FLOW CONTROL
MAX WATER EL. = 419.0
OUTLET I.E. = 413.1
BOTTOM OF VAULT E.L.
= 409.1
STORAGE REQUIRED =
±25,920 CF
STORAGE PROVIDED =
-26,000 CF
WATER QUALIT`"
BASIC WATER QUALITY
VOLUME REQUIRED =
±51089 OF
I IAI I II 10 mm&+ ,-__
- --- --
5"
51D
NORTH VAULT VOLUMES
DETENTION
CONSERVATION FLOW CONTROL
MAX WATER EL. = 420.1
OUTLET I.E. = 416.0
BOTTOM OF VAULT EL. = 412.0
STORAGE REQUIRED = ±32,384 CF
STORAGE PROVIDED = ±32,800 CF
WATER QUALITY
BASIC WATER QUALITY
VOLUME REQUIRED = f5,749 CF
VOLUME PROVIDED = ±24,000 CF
(1' SEDIMENT STORAGE)
26' PRIVATE ACCESS TRACT
13' 1 13'
1' MIN.
2' ::_jI 2' 1' MIN.
Li
CEME��T CONCRETE L2" COMPACTED DEPTH CLASS 'B' ASPHALT CONCRETE PAVEMENT
ROLLED CURB
SEE K(CRS DWG. NO. 3-002 1-1/2" COMPACTED DEPTH CRUSHED ROCK SURFACING TOP COURSE ALTERNATE
5" COMPACTED DEPTH CRUSHED ROCK SURFACING BASE COURSE 4" ATB
ADDITIONAL TREATMENT MAY BE REQUIRED DEPENDING ON SOILS CONDITIONS
PER KING COUNTY ROAD STANDARDS SECTION 4.02
TRACT B - 26' Private Access
NOT TO SCALE SERVES UP TO SIX PARCEL MAXIMUM
36' R
15' WALK
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