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A-13: RSR Impervious Surface Review Date: Public Hearing Date:
April 5, 2017 Estimated Date May 3, 2017
Prepared by:
Jeremy Davis, Senior Planner
Proponent/Applicant:
Thurston County Long Range Planning Division of the Resource Stewardship Department.
Action Requested:
Amend Zoning Ordinance to Review Adopted Impervious Surface Limits in the Residential Sensitive Resource 2-4 DU/Acre Zoning District
Set date for public hearing.
Map Changes Text Changes Both Affects Comprehensive Plans/documents Affected Jurisdictions: City of Tumwater
ISSUE 1 During the implementation of the Low Impact Development Standards, adopted by Ordinance 2
No. 15390 for the Tumwater UGA Zoning Ordinance, it was found that the new standard for the 3
Residential Sensitive Resource 2-4 Dwelling Unit per Acre Zoning District did not account for 4
larger lots. 5
6
The City of Tumwater is currently moving forward with a proposed amendment to address this 7
issue, which is scheduled to go to City Council in April 2017. 8
9
PROPOSED OPTIONS 10 Staff has prepared the following three options for the Planning Commission to consider. Options 11
may be modified as desired by the Planning Commission. Public notice for the public hearing 12
will be structured to inform the public of possible changes. 13
14
OPTION A: Amend the Tumwater UGA Zoning Ordinance (Title 22) to be consistent with the 15
current City of Tumwater recommendation as outlined above. 16
17
18
OPTION B: Amend the Tumwater UGA Zoning Ordinance (Title 22) to revert back to the 19
previous standard effective prior to December 31, 2016. 20
21
OPTION C: Leave the current standard in place. 22
23
24
25
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RSR Impervious Surface Review April 5, 2017
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ANALYSIS 1 Use of RSR in Tumwater and the Tumwater UGA 2
The Residential/Sensitive Resource (RSR) designation was created to address environmentally 3
sensitive areas and as a method to preserve open space. It was included in the 1995 4
Tumwater/Thurston County Joint Plan and Title 22 Tumwater Urban Growth Area Zoning in 5
1996. The intent is to accommodate low-density residential neighborhoods while still meeting 6
density goals of the Growth Management Act and provide services. The use of this designation 7
in the 1995 Joint Plan was limited to areas that included sensitive wetlands and areas in sensitive 8
watersheds (Percival Creek). 9
The Thurston County/Tumwater Joint Plan was amended in 2010 to account for surfacing high 10
groundwater flooding issues outlined in the Salmon Creek Basin Plan. The RSR designation was 11
specifically amended in the joint plan in 2010 to apply to environmentally hazardous areas. 12
Attachment A includes the current Joint Plan Land Use Maps for the unincorporated Tumwater 13
UGA as well as the current City of Tumwater Comprehensive Plan Land Use Map. Please note, 14
the joint plan land use map still includes two large areas that have been annexed by the City of 15
Tumwater. 16
Also in Attachment A, are maps of the areas zoned RSR 2-4 DU/AC in the unincorporated 17
Tumwater UGA, including: 18
Name Number of Parcels
Total Acreage Parcel Size Range
1 Sapp Road 8 51.31 1.18 to 9.82 2 Sapp Road 2 1 1 1 3 Sapp & Linwood 7 10.11 0.44 to 2.46 4 Linwood Avenue 6 8.99 0.24 to 2.38 5 Rural & Trosper 1 13.89 13.89 6 88th Avenue 70 147.07 0.06 to 18.31 Totals 93 232.37 0.06 to 18.31
19
The parcel sizes in the zoning district currently range from 0.06 up to 18.31. There are four 20
parcels greater than 10.0 acres, ten parcels between 5.01 and 10.0 acres, 28 parcels between 1.0 21
and 5.01 acres, with the remaining 51 parcels one acre or less. 22
Other Critical Areas in the Study Areas: 23
The RSR designation has also been used for properties with other critical areas such as 24
significant wetlands, riparian areas, and uplands of important streams such as Percival Creek. 25
This designation is used along with the County’s Critical Areas Ordinance to protect sensitive 26
areas. 27
High Groundwater Flooding and Critical Areas Regulations: 28
The 88th Avenue area is designated as RSR 2-4 in the southern Tumwater UGA and is subject to 29
periodic surfacing high groundwater flooding. Surfacing high groundwater flood regulations 30
will still limit development in areas prone to this type of flooding. Areas that are subject to high 31
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RSR Impervious Surface Review April 5, 2017
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groundwater flooding were added as a special management area in the Thurston County Critical 1
Areas regulations in 2000 with Ordinance No. 12155. These regulations were updated and 2
amended with the 2012 Critical Areas Ordinance Update. The regulations were the result of the 3
serious groundwater flooding that occurred throughout Thurston County in 1998-1999. This 4
flooding led Thurston County to declare a local emergency in February of 1999 (Resolution No. 5
11890), which was replaced in May 1999 (Resolution No. 11931), and to adopt a moratorium 6
(Ordinance No. 12010) in August of 1999 suspending the issuance of certain permits, including 7
subdivision and building permits, until high groundwater regulations could be adopted. This 8
flooding also resulted in the Salmon Creek Basin Plan. 9
High groundwater flooding occurs when subsurface geologic conditions prevent water from 10
moving out of an area either to a deeper aquifer or laterally through the soil as fast as the water 11
enters the groundwater system. Aside from surface flooding, high groundwater can cause the 12
failure of on-site wastewater treatment systems, contamination of drinking water wells, and 13
interfere with surface stormwater facilities. 14
December 2016 Low Impact Development Amendments 15
The County adopted new low impact development regulations in the Tumwater UGA with 16
Ordinance No. 15390. Previous to this, there was no stated impervious surface standard for this 17
zoning district. Impervious surfaces were limited by the overall density limitations, building 18
coverage on each lot, and other limits. The new standards changed the lot coverage standards 19
from an overall building coverage limit to an impervious surface coverage limit. 20
22.08.050 - Density regulations. 21
Density regulations in the RSR zone district are as follows: 22
23
… 24
G. Lot Coverage, Maximum for All Buildingsimpervious surface: forty percent of total area of 25
the lot or seven thousand five hundred square feet, whichever is less; 26
… 27
In the past couple of months it has been found this standard does not adequately account for the 28
larger lots found in areas designated as RSR in the unincorporated Tumwater UGA. 29
City of Tumwater Recommendations 30
The City of Tumwater began working on the proposed amendment with their planning 31
Commission in February 2017, and is expected to complete their decision in April or May of this 32
year depending on City Council timelines. 33
34
The City of Tumwater Planning Commission held a public hearing on March 14, 2017. The 35
written public hearing comments are located in Attachment B. 36
37
The current City of Tumwater Planning Commission recommendation to their City Council is 38
included in Attachment C. If there are any changes from the City Council, staff will provide 39
these to the Planning Commission in advance of the public hearing. 40
41
42
43
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RSR Impervious Surface Review April 5, 2017
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Thurston County Code Amendments 1
The recommended changes for the County’s Tumwater UGA Zoning Ordinance (Title 22), based 2
on the city’s current proposed amendments, would result in the following amendments: 3
4
5
22.08.050 Density Regulations. 6
… 7
G. Lot coverage, maximum for all buildingsimpervious surface: 8
1. The maximum impervious surface for lots smaller than one acre is forty percent of the 9
total area of the lot or seven thousand five hundred square feet, whichever is less;, 10
11
2. The maximum impervious surface for lots between one acre and less than five acres is 12
seven thousand five hundred square feet plus an additional two thousand square feet for 13
every additional acre in lot size, rounded to the nearest acre, 14
15
3. The maximum impervious surface for lots five acres and larger is fifteen thousand five 16
hundred square feet plus an additional three thousand square feet for every additional 17
acre in lot size, rounded down to the nearest acre, 18
19
… 20
21
Table 22.08.050(G) LOT COVERGE IMPERVIOUS SURFACE 22
Please See 22.08.050(G) for Specific Standards 23
24
Acres Max Impervious Surface (in Sq. Ft.) 0.25 4,356 0.50 7,500 0.75 7,500 1.00 9,500 2.00 11,500 3.00 13,500 4.00 15,500 5.00 18,500 6.00 21,500 7.00 24,500 8.00 27,500 9.00 30,500 10.00 33,500
11.00+ See 22.08.050(G) 25
26
There are also two minor amendments proposed to the definitions for building coverage and lot 27
coverage to correct inconsistencies with the recent low impact development amendments. 28
29
30
31
32
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RSR Impervious Surface Review April 5, 2017
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Section 22.04.080 Building Coverage. 1
2
“Building coverage”. See “lot coverage,” Section 22.04.325. means the amount or percentage of 3
ground area covered or occupied by buildings, usually expressed in square feet or percentage of 4
the lot. 5
6
Section 22.04.325 Lot Coverage. 7
8
"Lot coverage" means the amount or percentage of ground area covered or occupied by 9
impervious surface(s)building(s) usually expressed in square feet or percentage of land on the lot 10
and measured horizontally at the foundation. 11
12
Impervious Surface Coverage for Options: 13
14
The three options mentioned above will result in different impervious surface coverage limits. 15
Below are three examples comparing a 12,500 sq. ft. lot, a 2.5 acre lot, and a 10 acre lot under 16
each option. The sizes were selected to compare the three levels of impervious surface coverage 17
in the City of Tumwater proposal with existing and past requirements. 18
19
0.25 acre lot: 20
21
Option Impervious Surface Limits
Effective % Lot Coverage
Lot Coverage in Square Feet
A. City of Tumwater Recommendation
7,500 sq. ft or 40% whichever is less
40%
4,356
B. Current Tumwater UGA Zoning Ordinance
7,500 sq. ft. or 40% whichever is less
40%
4,356
C. Previous Zoning Ordinance
40% Building Coverage
40% plus driveways and patios
4,356+ (Only Buildings)
22
3 Acre Lot (130,680 sq. ft.): 23
24
Option Impervious Surface Limits
Effective % Lot Coverage
Lot Coverage in Square Feet
A. City of Tumwater Recommendation
9,500 sq. ft. plus 2,000 sq. ft. per acre for each acre above one acre
10.3%
13,500
B. Current Tumwater UGA Zoning Ordinance
7,500 sq. ft. or 40% whichever is less
5.7%
7,500
C. Previous Zoning Ordinance
40% Building Coverage
40% plus driveways and patios
52,272+ (Only Buildings)
25
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RSR Impervious Surface Review April 5, 2017
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1
10 Acre Lot (435,600 sq. ft.): 2
3
Option Impervious Surface Limits
Effective % Lot Coverage
Lot Coverage in Square Feet
A. City of Tumwater Recommendation
9,500 sq. ft. plus 3,000 sq. ft. per acre for each acre above five acres
7.7%
33,500
B. Current Tumwater UGA Zoning Ordinance
7,500 sq. ft. or 40% whichever is less
1.7%
7,500
C. Previous Zoning Ordinance
40% Building Coverage
40% plus driveways and patios
174,240+ (4 acres) (Only Buildings)
4
DEPARTMENT RECOMMENDATION 5 Staff recommends Option A, and requests the Planning Commission set a public hearing for, 6
May 3, 2017 at 7:00 p.m. to receive public testimony on proposed amendments to the Tumwater 7
UGA Zoning Ordinance (Title 22) as outlined in the staff report. 8
9
SEPA 10 An environmental determination for the proposed code amendment to amend the Tumwater 11
UGA Zoning Ordinance is required pursuant to WAC 197-11-704. That will be completed 12
following the Planning Commission recommendation on the proposed amendments. 13
14
NOTIFICATION 15 This briefing was posted online and sent to the Resource Stewardship Department Long Range 16
Planning Division’s webmail subscribers. 17
18
After Planning Commission sets the date for public hearing, notification will be posted online 19
and published in the Olympian and sent to webmail subscribers at least twenty (20) days prior to 20
the scheduled hearing as required by Chapter 2.05 TCC. 21
22
PUBLIC COMMENT 23 Staff has included public comments received by the County and the City of Tumwater Planning 24
Commission at their public hearing. Public comments are supportive of amending the current 25
standards. 26
27
ATTACHMENTS 28 Attachment A: Comprehensive Plan Land Use Maps and Study Area Maps 29
Attachment B: Public Comments 30
Attachment C: Current Draft City of Tumwater Ordinance as Recommended by the Tumwater 31
Planning Commission 32
Attachment D: Draft Options for Thurston County Planning Commission 33
34
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Attachment A: Maps
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Black Hills High School
George Washington Bush Middle School
Fire StationTimberland Library
Tumwater Valley Municipal Golf Course
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Tumwater Hill Elementary
Peter G. Schmidt Elementary
Michael T. Simmons Elementary
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North End Fire Station
.
City of Tumwater City-Wide Land Use Map
Tumwater Community Development DepartmentDecember 27, 2016
DISCLAIMER: The City of Tumwater does not warrant, guarantee, or accept any liability for the accuracy, precision, or completenessof any information shown hereon or for any inferences made therefrom.
Legend
n Tumwater Civic Facilities
n Tumwater Schools
Tumwater_Streets_Cartographic
Tumwater_City_Limits
Tumwater City Limits
Urban Growth Boundary
Airport Related Industry
Brewery District
Capitol Boulevard Community
Community Services
General Commercial
Heavy Industry
Light Industry
Manufactured Home Park
Mixed Use
Multi-Family High Density
Multi-Family Medium Density
Neighborhood Commercial
New Market Historic District
Parks/Open Space
Public Institutional
Residential/Sensitive Resource
Single Family Low Density
Single Family Medium Density
Tumwater Town Center
Utilities
Pipelines
City of Olympia
AIRPORT
SOUTH PUGET SOUNDCOMMUNITY COLLEGE
0 1 2 3 40.5Miles
1:33,951Page 8 of 51
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MIDDLE ST SE
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25TH AVE SW
TUMWATER BLVD SW
N 5
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RD
SW
LOG CABIN RD SE
SHE
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RD
SE
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SE
SKI V
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LN
SW
PARK DR SW
ANTS
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RD
SW
UNKNOWN
85TH AVE SW
MCCORKLE RD SE
LOR
NE
ST
SE
CARNEY RD SE
E ST SE
VISTA LP SW
60TH AVE SW
BO
ULE
VAR
D E
XT
RD
SE
W ISRAEL RD SW
32ND AVE SW
28TH AVE SE
S 5T
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48TH AVE SW
37TH AVE SW
79TH AVE SW
RIVER DR SE
LON
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W
PEAR
ST
SE
LAZY
ST
SW W DENNIS ST
BUSH
MO
UNTA
IN D
R SW
6TH
AVE
SW
O ST SE
78TH AVE SW
E W ST
70TH AVE SW
LEA
R S
T SW
53RD AVE SE
EAST V ST SE
91ST AVE SW
JOPP
A ST
SW
101ST AVE SE
TARTAN DR SW
SPR
ING
ER L
AKE
LN
SE
BRIDLE DR SE
80TH AVE SE
CRIT
ES S
T SW
BUK
ER S
T S
E
N 2
ND
AV
E
LIVE
LY S
T SW
S 3R
D A
VE
S 7T
H A
VE
SW
FRO
NTA
GE
RD
SW
73RD AVE SW
LATH
RO
P IN
DU
STR
IAL
DR
SW
89TH AVE SW
MOTTMAN RD SW
103RD LN SW
RUBY ST SE
80TH AVE SW PAT KENNEDY WAY SW
42ND AVE SE
TYEE
DR
SW
HOLLY LN SE
LAM
BSKI
N S
T S
W
104TH LN SE
LID
O C
T S
W
BRE
CH
ST
SE
40TH LN SW
S 6T
H A
VE
E V ST
21ST AVE SE
TRO
SPE
R ST SW
SCH
UE
TZ L
N S
W
63RD CT SW
JULI
CT
SE
RH
ON
DO
ST
SW
GA
LLO
WAY
ST
SE
WAR
REN
LN
SE
65TH AVE SW
GOV STEVENS AVE SE
BENT ARROW LN SE
SILV
ER F
OX
CT
SW
U ST SE
C ST SW
24TH AVE SE
100TH LN SE
CUMBERLAND AVE SW
84TH AVE S
E
BAY ST SW
104TH LN SE
CAB
OT
ST S
E
L ST SW
27TH AVE SW
LINDA ST SE
MILLER ST SW
HO
LIDAY D
R SE
BLASS AVE SE
68TH CT SWN
3R
D A
VE
SW
28TH CT SE
40TH AVE SE
SCOTT ST SE
UNKNOWN
I 5
FIR
ST
SE
UNKNOWN
I 5 A
CC
ESS
UN
KNO
WN
I 5 A
CC
ESS
I 5 A
CC
ESS
UNKNOWN
UNKNOWN
UN
KN
OW
N
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CESS
UN
KN
OW
N
I 5
UNKNOWN
TILL
EY R
D S
22ND AVE SE
UNKNOWN
UNKNOWN
I 5 A
CC
ESS
US 101
UN
KN
OW
N
I 5 A
CC
ESS
I 5 A
CC
ESS
US 101 ACCESS
UN
KN
OW
N
I 5
UNKN
OW
N
DESCHUTES RIVERPE
RC
IVAL
CR
EEK
CHAMBERS CREEK
PERCIVAL CREEK
DESCHUTES RIVER
DESCHUTES RIVER
Tumwater High School
Black Lake ElementaryTumwater Middle School
Black Hills High School
Peter G. Schmidt Elementary
George Washington Bush Middle School
Fire Station
New Market Skills Center
Tumwater Hill Elementary
Michael T. Simmons Elementary
Old Town Center
Tumwater City HallTimberland Library
North End Fire StationTumwater Valley Municipal Golf Course
MAP 3-1FUTURE LAND USE
TUMWATER URBAN GROWTH AREA
Tumwater Community Development DepartmentOctober 6, 2010
1 0 1 20.5 Miles
DISCLAIMER: The City of Tumwater does not warrant, guarantee, or accept any liability for the accuracy, precision, or completenessof any information shown hereon or for any inferences made therefrom.
LegendTumwater City Limits
Urban Growth Boundary
n Tumwater Civic Facilities
n Tumwater Schools
Power and Pipeline Easements
FUTURE LAND USE DESIGNATIONSGeneral Commercial
Heavy Industry
Light Industry
Mixed Use
Multi-Family Medium Density
Neighborhood Commercial
Parks/Open Space
Residential/Sensitive Resource
Shoreline Environment
Single Family Low Density
Single Family Medium Density
Utilities
City of Olympia
AIRPORT
SOUTH PUGET SOUNDCOMMUNITY COLLEGE
± Page 9 of 51
£
£ §̈¦
TUMWATER
MCCORKLE
RD
SE
CAP
ITO
L BL
VD S
66TH AVE SW
TUMWATER BLVD SE
ESKRIDGE BLVD SE
93RD AVE SW
DENNIS ST SE
YELM HWY SE
101ST AVE SW
70TH AVE SE
BLACK
LAKE
BLVD
SW
NORTH ST SE
BOU
LEVA
RD
RD
SE
TROSPER RD SW
LITTL
EROCK
RDSW
93RD AVE SE
54TH AVE SW
OLD
HWY
99 SE
88TH AVE SE
LINWOOD AVE SW
ISRAEL RD SW70TH AVE SW
LOG CABIN RD SE
BON
NIEW
OO
D D
R SE
73RD AVE SE
49TH AVE SW
88TH AVE SW
TUMWATER BLVD SW
RU
RA
LR
DS
W
KIM
MIE
ST
SW
T ILL
EY
RD
SE
CASE
RD SW
CAP
ITO
L W
AY
SE
BLAC
K L
AKE
-BE
LMO
RE
RD
SW
HEN
DE
RS
ON
BLV
D S
E
CA
I NR
DS
E
22ND AVE SE
CO
OP ER PT RDSW
SAPP RDSW
KIR
SO
P
RD
S
W
1 32
4
5
6
121
101 5
Tumwater UGAResidentail Sensitive Resource 2-4 Units Per Acre
0 0.50.25Miles
¯
Parcels in R/SR Zoning
R/SR Zoning
Urban Growth Area Boundary
City/Town Limits
Map Created on 2/27/2017 by kah
Thurston County makes every effort to ensure that this map is a true and accurate representation of the work of County government. However, the County and all related personnel make no warranty, expressed or implied, regarding the accuracy, completeness or convenience of any information disclosed on this map. Nor does the County accept liability for any damage or injury caused by the use of this map. Nor does the County accept liability for any decisions based solely on this map. To the fullest extent permissible pursuant to applicable law, Thurston County disclaims all warranties, express or implied, including, but not limited to, implied warranties of merchant ability, data fitness for a particular purpose, and non -infringements of proprietary rights. Under no circumstances, including, but not limited to, negligence, shall Thurston County be liable for any direct, indirect, incidental, special or consequential damages that result from the use of, or the inability to use, Thurston County materials. If any portion of this map disclaimer is missing or altered, Thurston County removes itself from all responsibility from the map and the data contained within.
Map Area # Parcels Total Acres1 8 51.312 1 13 7 10.114 6 8.995 1 13.896 69 147.07
Total 92 232.37 Page 10 of 51
1282
8430
200
SAPP RD SW
KLA
HO
WY
A L
N S
W
42ND LNSW
43RDLN SW
44THLN SW
45THLN SW
JOPPA LN SW
1282
8430
300
1283
3110
600
1283
3120
200
1283
3120
201
1283
3120
30012
8331
2040
0
1283
3120
500
Sapp Road ¯
Parcels in R/SR Zoning
R/SR Zoning
Urban Growth Area Boundary
City/Town Limits
Parcel Number Acres Parcel Number Acres12828430200 1.18 12833120201 5.0712828430300 9.82 12833120300 9.8212833110600 1 12833120400 9.8212833120200 4.78 12833120500 9.82
Total Acres 51.31
1
0 200100Feet
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SAPP RD SW
ANTS
EN S
T S
WCITY R
OW
CASSIE DR
SW
1283
3110
400
Parcel Number Acres12833110400 1Total Acres 1
¯
Parcels in R/SR Zoning
R/SR Zoning
Urban Growth Area Boundary
City/Town Limits
2
Sapp Road
0 200100Feet
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SAP
P R
D S
WR
UR
AL
RD
SW
LINWOOD AVE SW
BLA
CK
STO
NE
DR
SW
GROTTO CTSW
12834220200
33203900100
33203900101
33203900102
33203900103
33203900104
33203900600
Sapp & LinwoodParcel Number Acres12834220200 2.4533203900100 1.8833203900101 0.9933203900102 0.4533203900103 2.4633203900104 0.4433203900600 1.44Total Acres 10.11
¯Parcels in R/SR Zoning
R/SR Zoning
Urban Growth Area Boundary
City/Town Limits 30 200100Feet
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LINWOOD AVE SW SUSI
TNA
LN S
W
LAKE
PAR
KDR
SW
80700000200
8070
0000
201
8070
0000
300
8070
0000
301
8070
0000
302
8070
0000
400
Linwood Avenue¯
Parcels in R/SR Zoning
R/SR Zoning
Urban Growth Area Boundary
City/Town Limits
4
Parcel Number Acres Parcel Number Acres80700000200 2.12 80700000301 0.2480700000201 1.88 80700000302 0.3780700000300 2.38 80700000400 2
Total Acres 8.99
0 200100Feet
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RU
RAL
RD
SW
54TH AVE SW
EA
GLE
LN S
W
FIES
TAST
SW
GO
LDE
N E
AG
LE L
N S
W
BA
L DE
AG
L ELN
SW
EAGLE LN SW
EA
GLE
LN
S
WGRAY SEA EAGLE LN SW
GRAY SEA EAGLE LN SW12
8343
2000
0
Rural & Trosper
Parcel Number Acres Multiple Zoning12834320000 13.89 YesTotal Acres 13.89
¯
Parcels in R/SR Zoning
R/SR Zoning
Urban Growth Area Boundary
City/Town Limits
5
0 200100Feet
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12715420209
7246000040072480000400
7248000080072480000900
7.
9.8.
11.10.
6.5.4.
127154202061271542020512715420202
2.1.
3.7905000120012715310200
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72460000600
72450001200
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724600003007246000020072460000100
12715420208
12715420101
23.
19.20.
24.
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18.17.
25.26.
72480000700
7248000060072480000500
72460001300
7246000120072460001100
7246000100072460000500
1271542010612715420104
32. 12715411700
12715411900
72450000100
72450000200
7245000100072450001100
72460000800
42.
45.
43.
47.46.
44.
40.41.
39.38.
36.
33.34.35.
37.
7245000090072450000700
7245000060072450000500
72450000300
127154118001271541140012715411200
12715411200
12715340100
12715340300
12715420103
12715420105
12715420200 12715420204
12715420211
12715420300 12715420400
12715430200
1271543020212715430300
79050000100
79050000200
79050000300
79050000400
79050000500
7905000060079050000700
79050000800
79050000900
79050001000
79050001100
3 1
37353432 33423114
26
25
4 5
6
27
745 43 36 38
39
4140474612
302928
9 17 16 13 44
15182122248
20 19
23
11
10
2
93RD AVE SW/SR 121
88TH AVE SW88TH AVE SW
CASE
RD
SW
AR
MS
T RO
NG
RD
SW
89TH AVE SW
91ST AVE SW
MA
RLE
NE
CT
SW
WA
LTER
CT
SW
FAS
SE
T TS
TS
W
88th Avenue ¯Parcels in R/SR Zoning
R/SR Zoning
Urban Growth Area Boundary
City/Town Limits
6
Parcel Number Acres Multiple Zoning
Parcel Number Acres Multiple Zoning
12715310100 7.35 72450001000 0.6112715310200 7.35 72450001100 0.4912715340100 14.79 72450001200 0.5412715340300 18.31 Yes 72460000100 0.5312715411200 0.78 72460000200 0.5512715411400 0.52 72460000300 0.5512715411700 0.53 72460000400 0.6712715411800 0.53 72460000500 0.6212715411900 0.4 72460000600 0.5512715420101 0.48 72460000700 0.5512715420102 0.52 72460000800 0.5412715420103 1.43 72460000900 0.5412715420104 0.86 72460001000 0.5412715420105 1.27 72460001100 0.5312715420106 1.44 72460001200 0.4712715420200 5 72460001300 0.7512715420202 0.57 72480000400 0.4612715420204 4.93 72480000500 0.5712715420205 0.45 72480000600 0.5612715420206 0.47 72480000700 0.4612715420208 0.43 72480000800 0.4712715420209 0.47 72480000900 0.4712715420211 5.2 79050000100 212715420300 2.5 79050000200 2.0112715420400 2.5 79050000300 2.0412715430200 3.28 79050000400 2.0212715430202 6.6 79050000500 2.0812715430300 5.07 79050000600 2.872450000100 0.47 79050000700 2.3972450000200 0.37 79050000800 272450000300 0.53 79050000900 2.0772450000500 0.6 79050001000 1.9172450000600 0.6 79050001100 1.972450000700 0.69 79050001200 0.0672450000900 0.59 12834320000 13.89
Total Acres 147.07
0 200100Feet
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Attachment B: Public Comments
City of Tumwater &
Thurston County Docketing Process
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1
Jeremy Davis
From: Joel Pedersen <PedersenEnterprises@hotmail.com>Sent: Wednesday, March 1, 2017 8:18 PMTo: Jeremy DavisSubject: Impervious surface limits
I would like you to immediately address the maximum impervious surface limits in the Residential Sensitive Resource District by adding this issue to your 2016‐2017 docket. The current 7500 sq ft maximum lot coverage is unnecessarily preventing larger parcel owners from utilizing their property. These limits left unchanged, will unfairly burden a high percentage of land owners in the Residential Sensitive Resource District. Thank you for giving this issue your attention, Joel Pedersen Pedersen Land and Timber Inc. Tumwater, WA 98512 360‐878‐1979
Page 32 of 51
1
Jeremy Davis
From: J Pedersen <jorjanapedersen@hotmail.com>Sent: Wednesday, March 1, 2017 8:34 PMTo: Jeremy DavisSubject: Add Impervious Surface Limit in RSR review to 2016-17 Docket
Dear Jeremy,
I would like to request the County add the item to amend Tumwater UGA Zoning Ordinance to Review Impervious Surface Coverage in the Residential Sensitive Resource Zoning District to their 2016-17 Docket. I have owned approximately 10 acres at 2519 Sapp Rd SW for almost 50 years. I have been using this property very modestly and preserving its natural condition for the benefit of the generations that will come after me. This property was part of the original land grant my husband's grandfather was issued in 1869. My family has continued to be good stewards of this land for 148 years. The time will come when I leave this 10 acres to my own two children. My hopes and dreams for this treasured land is that I can provide each of my kids with a building site.
The current limitation of 7500 sq ft of impervious surface has just taken that dream away. My property has so many other critical areas that reaching a building site outside of the seasonal streams, wet areas, and steep slopes would be impossible with only 7500 sq ft allowed. My property is about 1260 feet long and 325 ft wide. A steep slope runs right down the middle with a seasonal stream not too far from it. In order to avoid those areas and meet the existing setbacks, a long driveway would have to be built to reach the back of my property. You can see that reaching 1000 - 1200 feet back with a driveway would take over 10,000 sq ft of impervious surface. That makes it impossible all together. I don't think the people who wrote the limit of 7500 sq ft really looked to see what that limit would be doing to property owners. I hope you will add this to your Docket so you can increase the limits to an amount high enough to build a long driveway and a nice size house with outbuildings. This reasonable amount of building is what should be allowed for our freedom in the use of our own property.
This extreme limitation seems to be a regulation for the sake of a regulation. The critical areas are already tremendously protected by setbacks preventing most of our land from being used anyway. The limits already in place are satisfactorily protecting the environment and keeping it safe. Please help change this unfair limit, as we have taken great care of this property over the last 148 years and really don't need ridiculous rules to help us.
Thank you for looking into and pursuing this change.
Sincerely,
Page 33 of 51
2
Rosemary L. Shattuck
Page 34 of 51
1
Jeremy DavisFrom: Kelly McNamara <Kelly.McNamara@cbolympia.com>Sent: Thursday, February 23, 2017 11:38 AMTo: Jeremy DavisSubject: Impervious Surface Coverage
Mr. Davis, I have been made aware of yet another issue regarding the Impervious Surface requirements in the Residential Sensitive Resource Zone District. As a real estate agent for many years in this area, I have had a number of clients and friends who have been affected by these well intentioned rules limited use on large parcels. While intended to protect resources, it seems it has had the un-intended effect of severely limiting the use of properties in an inequitable way with those having large parcels more adversely affected than others. All of the people I know that have been affected have not been trying to do major projects or disruptions, but rather trying to utilize the space in a minimal way. It seems that the current rules as written need to be revisited to perhaps better balance the impact on large and small parcels. It seems this would be an ideal item to add to the County’s Docket for 2016-17 and I would encourage you to do so. Thanks for your consideration. Kelly McNamara, CRS Coldwell Banker 360 790-8668 Cell 360 352-7651 Office 360 754-8054 FAX mcnamara@coldwellbanker.com
Page 35 of 51
1
Jeremy Davis
From: J Pedersen <jorjanapedersen@hotmail.com>Sent: Tuesday, February 21, 2017 11:33 AMTo: Jeremy DavisSubject: request to add the RSR impervious sufrace coverage item to the 2016-17 docket
Dear Jeremy Davis, I would like to see the item regarding the “40% or 7500 sq ft, whichever is less” impervious surface limit in the RSR district reviewed and added to the Thurston County Docket for 2017. This should be done immediately as it is preventing larger parcel owners, like me, from reasonable use of their property. I have applied for a building permit, and this limit is currently preventing me from being issued a permit to build a necessary structure. This limit is so restrictive that many property owners in the RSR zone have lost any ability at all to build on their parcels. The land within this zone is inherently restricted from building due to environmentally sensitive areas on these properties. Parcels in the RSR zone have critical areas such as seasonal streams, wetlands, steep slopes, and gopher soils. Just finding a suitable building site can be a challenge considering those parameters. The 7500 sq ft maximum impervious surface limit currently in place does not even allow a driveway long enough to access environmentally suitable building sites on many parcels. Consider a driveway that needs to be 750 ft long in order to reach a buildable site. This, in itself, at 10 ft wide reaches the 7500 sq ft limit. There are at least five 9.82 parcels in my neighborhood where long driveways were/will be necessary, mine included. I have a 1000 ft long driveway and the parcel next to mine has critical areas in every section except for the back of it. This will require at least an 1100 ft long driveway (11,000 total sq ft) to access an environmentally acceptable building site. The 7500 sq ft limit doesn’t even allow enough for completing a driveway. Additionally, in my case, with a 9.82 acre parcel, imposing a 7500 sq ft limit on 427,759 sq ft of property is an unjustifiable limitation. This limitation results in only 1.75% use of my property. This is an inequitable limitation compared to the 40% coverage (which is a second measurement listed in this provision) allowed on neighboring lots within this RSR zone. This disproportionate limit is outside the original intent of the RSR zone. I was a member of the original committee to establish the RSR zone in 1995, and I recall this 7500 sq ft limit being written as a measurement for small lots within planned residential communities. Its application to larger lots is too limiting and unfair. Both of these situations illustrate how the current impervious surface limit of “40% or 7500 sq ft, whichever is less” is unsuitable for larger parcels and should be amended as soon as possible. It is an unfair and unnecessary limitation on larger parcel owners and is preventing people from reasonable use and enjoyment of their land. I believe this regulation is posing undue hardship unnecessary in carrying out the spirit of the RSR designation and request the County to add this item to their 2016- 2017 Docket. Thank you for your time and consideration in amending this, Jorjana Pedersen 2425 Sapp Rd SW Olympia, WA 98512
Page 36 of 51
1
Jeremy Davis
From: p2425@netzero.netSent: Wednesday, March 1, 2017 8:25 PMTo: Jeremy DavisSubject: Add RSR Impervious Surface Limit review to 2016-17 Docket
Dear Jeremy, I would like to request the County add the item to amend Tumwater UGA Zoning Ordinance to Review Impervious Surface Coverage in the Residential Sensitive Resource Zoning District to their 2016-17 Docket. I have owned approximately 10 acres at 2519 Sapp Rd SW for almost 50 years. I have been using this property very modestly and preserving its natural condition for the benefit of the generations that will come after me. This property was part of the original land grant my husband's grandfather was issued in 1869. My family has continued to be good stewards of this land for 148 years. The time will come when I leave this 10 acres to my own two children. My hopes and dreams for this treasured land is that I can provide each of my kids with a building site. The current limitation of 7500 sq ft of impervious surface has just taken that dream away. My property has so many other critical areas that reaching a building site outside of the seasonal streams, wet areas, and steep slopes would be impossible with only 7500 sq ft allowed. My property is about 1260 feet long and 325 ft wide. A steep slope runs right down the middle with a seasonal stream not too far from it. In order to avoid those areas and meet the existing setbacks, a long driveway would have to be built to reach the back of my property. You can see that reaching 1000 - 1200 feet back with a driveway would take over 10,000 sq ft of impervious surface. That makes it impossible all together. I don't think the people who wrote the limit of 7500 sq ft really looked to see what that limit would be doing to property owners. I hope you will add this to your Docket so you can increase the limits to an amount high enough to build a long driveway and a nice size house with outbuildings. This reasonable amount of building is what should be allowed for our freedom in the use of our own property. This extreme limitation seems to be a regulation for the sake of a regulation. The critical areas are already tremendously protected by setbacks preventing most of our land from being used anyway. The limits already in place are satisfactorily protecting the environment and keeping it safe. Please help change this unfair limit, as we have taken great care of this property over the last 148 years and really don't need ridiculous rules to help us. Thank you for looking into and pursuing this change. Sincerely, Rosemary L. Shattuck ____________________________________________________________ Affordable Wireless Plans Set up is easy. Get online in minutes. Starting at only $14.95 per month! www.netzero.net
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1
Jeremy DavisFrom: Teresa Shattuck <resatree@nwlink.com>Sent: Tuesday, February 28, 2017 12:56 PMTo: Jeremy DavisCc: Teresa ShattuckSubject: Proposed Development Code Changes Regarding Impervious Surface Coverage
Hi Jeremy, Our family owns approximately 10 acres in Tumwater at 2438 Sapp Road NW. The current proposal discriminates against large property owners. The proposal says that property owners would be allowed 7,500 sq ft of impervious surface or 40%, whichever is less. This means that a 1/2 half acre piece of land would be allowed nearly 40% of impervious surface and a 10 acre piece of land would only be allowed 2.5% of impervious surface. Also, these surface restrictions would very much impact our ability to put a long driveway to any potential building site. Additionally, the entire northern portion and much of the eastern portion of our land is Category II wetlands and regulated setbacks. That, alone, greatly reduces our hopes for future development of our land. Thank you for adding this impervious surface issue to the docket on March 14. Sincerely, Teresa Shattuck On behalf of Patrica Shattuck and Family.
Page 38 of 51
Attachment C: City of Tumwater Draft Ordinance
Planning Commission Recommendation
Page 39 of 51
A
Ordinance No. O2017-003 - Page 1 of 8
ORDINANCE NO. O2017-003
AN ORDINANCE of the City Council of the City of Tumwater, Washington, amending Section 18.08.050 of the Tumwater Municipal Code to support agricultural uses on large lots in the RSR Residential/Sensitive Resource Zone District.
WHEREAS, Ordinance O95-014 established the RSR Residential/Sensitive
Resource Zone District with the intent of accommodating and establishing low density residential neighborhoods in a manner that is compatible with areas of unique open space character and environmental sensitivity; and
WHEREAS, the lot coverage established by Ordinance O95-014, and subsequently modified by Ordinance 2016-037, limits impervious surface on a lot in the zone district to forty percent of the total area of a lot or 7,500 square feet, whichever is less; and
WHEREAS, the Agricultural Lands Chapter in the Conservation Element of the City’s Comprehensive Plan Conservation Element was updated in 2010 to reflect the City of Tumwater Strategic Plan’s goals and policies supporting sustainable urban agriculture; and
WHEREAS, Ordinance O2010-029 established urban agriculture within the RSR zone district provided that it was less than 30 acres in size and met other requirements; and
WHEREAS, the lot coverage requirements for the RSR Residential/Sensitive Resource Zone District have not been updated to reflect the City’s desire to see sustainable urban agriculture and do not allow for a reasonable level of agricultural facilities on parcels larger than five acres in zone district; and
WHEREAS, the City is required to plan under Chapter 36.70A RCW, the Growth Management Act; and
WHEREAS, this Ordinance is consistent with the City’s Comprehensive Plan; and
WHEREAS, this Ordinance meets the goals and requirements of the Growth Management Act; and
WHEREAS, this Ordinance was sent to the Washington State Department of Commerce on January 23, 2017, and accepted for expedited review on February 7, 2017 at least fourteen days before the proposed code amendments were adopted, in accordance with RCW 36.70A.106; and
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Ordinance No. O2017-003 - Page 2 of 8
WHEREAS, a Determination of Nonsignificance for the proposed code
amendments was issued on January 31, 2017 in accordance with the State Environmental Policy Act (Chapter 197-11 WAC) and in compliance with Chapter 16.04 of the Tumwater Municipal Code; and
WHEREAS, the Attorney General Advisory Memorandum: Avoiding Unconstitutional Takings of Private Property (Dec. 2015) on takings was reviewed and utilized by the City in objectively evaluating the proposed changes; and
WHEREAS, the Planning Commission received a briefing on the proposed code amendments on February 14, 2017, discussed the proposed code amendments at a work session on February 28, 2017, and held a public hearing on March 14, 2017; and
WHEREAS, following the public hearing and deliberations, the Planning Commission recommended the proposed code amendments to the Tumwater Municipal Code to the City Council; and
WHEREAS, the City Council’s General Government Committee reviewed the proposed code amendment in a briefing on March 7, 2017 and April 4, 2017; and
WHEREAS, the City Council discussed the proposed code amendments in a work session on April 11, 2017; and
WHEREAS, on April 18, 2017, the City Council considered the proposed code amendments; and
WHEREAS, the City Council finds that the provisions of this Ordinance are in the best interest of and protect the health, safety, and welfare of the citizens of the City.
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF TUMWATER, STATE OF WASHINGTON, DOES ORDAIN AS FOLLOWS:
Section 1. Tumwater Municipal Code Chapter 18.04.020 is hereby amended to read as follows: “Building coverage”. See “lot coverage,” TMC 18.04.120. means the amount or percentage of ground area covered or occupied by buildings, usually expressed in square feet or percentage of the lot.
Section 2. Tumwater Municipal Code Chapter 18.04.120 is hereby amended to read as follows:
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Ordinance No. O2017-003 - Page 3 of 8
"Lot coverage" means the amount or percentage of ground area covered or occupied by impervious surface(s)building(s) usually expressed in square feet or percentage of land on the lot and measured horizontally at the foundation.
Section 3. Tumwater Municipal Code Section 18.08.050 is hereby amended to read as follows: 18.08.050 Density regulations. Density regulations in the RSR zone district are as follows:
A. Site Area. All land divisions are subject to the lot size provisions of this section, provided that all land divisions must meet the following density requirements:
1. Minimum: two dwelling units per acre;
a. In situations where density requirements and lot size, shape, topography, or location result in a subdivision that cannot possibly meet the density requirements, a reduction in minimum density (i.e., an increase in maximum lot size) may be granted by the community development director if all of the following criteria can be met:
i. The lot to be subdivided must be less than or equal to one-half acre in total area.
ii. The reduction in minimum density may not result in more than one additional single-family dwelling.
iii. The reduction in density will not result in a density that is less than eighty-five percent of the minimum density required in the applicable zoning district.
iv. The conditions unique to the site (size, shape, topography, etc.) are not the result of actions by the applicant.
v. In no event may a reduction in density be granted if it would result in a use that would not be allowed as a permitted use, accessory use, or conditional use in the district in which the property is located.
2. Maximum: four dwelling units per acre, or if a land division is subject to the clustering provisions of subsection E of this section and not subject to the wetland protection standards of TMC Chapter 16.28, the maximum density shall be no greater than one hundred twenty-five percent of the maximum density that would otherwise be allowed.
B. Density Calculation. The calculation of the density requirements in subsection A of this section is based on the portion of the site that contains lots devoted to residential and associated uses (e.g., dwelling units; private community clubs;
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Ordinance No. O2017-003 - Page 4 of 8
stormwater detention, treatment and infiltration). The following land is excluded from density calculations:
1. Land that is required to be dedicated for public use as open space, right-of-way, or land on which development is prohibited by TMC Title 16, Environment, and land that is to be used for private roads. Provided, that portion of open space/park areas that consists of stormwater facilities and that is designed for active and/or passive recreational purposes in accordance with the drainage design and erosion control manual for Tumwater shall not be excluded from density calculations;
2. Land that is intended for future phases of development created in accordance with TMC 18.08.060;
3. Land that consists of lots devoted to uses other than residential and associated uses, including but not limited to churches, schools, and support facilities (except for stormwater detention, treatment and infiltration facilities).
C. Division of Land Not on Public Sanitary Sewer. Division of land in areas without sewer must occur in a manner that maintains long-term potential to achieve minimum required densities and efficient provision of sewer once sewer becomes available. For a proposed division of land not required to be served by the extension of public sewer or a community septic system at the time of approval, a conversion plan shall be submitted in accordance with TMC 18.08.060 for the entire property, and the proposed land division shall be subject to the following:
1. For land division of an existing lot of record created prior to September 15, 1998:
a. Any division creating two lots shall not be subject to the minimum density requirements of subsection A of this section, provided one of the lots created is at least five acres in size. A note must be included on the recorded land division that future land divisions shall meet minimum density requirements of subsection A of this section in each phase of development.
b. Any division creating more than two lots shall meet the minimum density requirements of subsection A of this section in each phase of development.
D. Lot Size Requirements.
1. Maximum: no maximum lot size;
2. Minimum: nine thousand five hundred square feet, or if a land division is subject to the clustering provisions of subsection E of this section or the wetland protection standards of TMC Chapter 16.28, the minimum lot size shall be seven thousand six hundred square feet;
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3. In the event that the minimum lot size provisions above make it impossible to achieve the minimum density permitted under subsection A of this section, one or more lots may be reduced in size by up to ten percent. This provision may be applied only to the minimum number of lots necessary to allow the minimum density to be achieved.
E. Clustered Subdivision. Any site in this zone district may be subdivided as a clustered subdivision, subject to the following:
1. The portion of the site dedicated for open space use shall be at least thirty percent of the area of the entire site;
2. At least one-half of the area dedicated for open space shall be useful for passive recreational purposes;
3. The area dedicated for open space shall be located so as to include environmentally sensitive areas (e.g., wetlands, riparian areas) to the maximum extent possible;
4. The clustered subdivision must meet all other provisions of this chapter.
F. Lots Located Adjacent to a Wetland. Lots located adjacent to a wetland and/or wetland buffer shall be as large as practicable within the allowances of this section and the physical conditions of the site.
G. Lot coverage, maximum for all buildingsimpervious surface:
1. The maximum impervious surface for lots smaller than one acre is forty percent of the total area of the lot or seven thousand five hundred square feet, whichever is less.
2. The maximum impervious surface for lots between one acre and less than five acres is seven thousand five hundred square feet plus an additional two thousand square feet for every additional acre in lot size, rounded down to the nearest acre.
3. The maximum impervious surface for lots five acres and larger is fifteen thousand five hundred square feet plus an additional three thousand square feet for every additional acre in lot size, rounded down to the nearest acre.
TABLE 18.08.050 LOT COVERAGE, IMPERVIOUS SURFACE
Acres Max Impervious Surface (in Sq. Ft.) 0.250 4,356 0.500 7,500 0.750 7,500 1.000 9,500 2.000 11,500
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3.000 13,500 4.000 15,500 5.000 18,500 6.000 21,500 7.000 24,500 8.000 27,500 9.000 30,500
10.000 33,500
H. Structure height: thirty-five feet, maximum; provided, however, that no structure shall penetrate imaginary airspace surfaces as defined by 14 C.F.R. Part 77. A map that provides detailed information on ground and imaginary airspace surface elevations is available for inspection in the community development department.
I. Yards.*
1. For lots less than nine thousand five hundred square feet in area, yards shall be as follows:
a. Front: twenty feet minimum from frontage property line on streets interior to a development, twenty-five feet minimum from frontage property line on streets classified in the Tumwater transportation plan as urban collectors, minor arterials, and major arterials;
b. Side: seven and one-half feet from property line, minimum;
c. Rear: ten feet, minimum, from rear property line; twenty-five feet minimum from rear property line abutting streets classified in the Tumwater transportation plan as urban collectors, minor arterials and major arterials. Exception: Storage, garden, and tool sheds 200 square feet in area or less may be located a minimum of 10 feet from the property line.
2. For lots greater than or equal to nine thousand five hundred square feet in area, yards shall be as follows:
a. Front: twenty feet minimum from frontage property line on streets interior to a development, twenty-five feet minimum from frontage property line on streets classified in the Tumwater transportation plan as urban collectors, minor arterials, and major arterials;
b. Side: ten feet from property line, minimum;
c. Rear: twenty feet, minimum, from rear property line; twenty-five feet minimum from rear property line abutting streets classified in the Tumwater transportation plan as urban collectors, minor arterials and
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major arterials. Exception: Storage, garden, and tool sheds 200 square feet in area or less may be located a minimum of 10 feet from the property line.
J. Planned Unit Developments. No development in this zone district shall be permitted using the planned unit development provisions of TMC Chapter 18.36.
*See TMC 18.04.670.
(Ord. O2016-037, Amended, 01/03/2017; Ord. O2011-002, Amended, 03/01/2011; Ord. O2004-009, Amended, 12/07/2004; Ord. O2000-004, Amended, 07/18/2000; Ord. O98-009, Amended, 10/20/1998; Ord. O98-001, Amended, 09/15/1998; Ord. O97-025, Amended, 12/02/1997; Ord. O96-022, Amended, 12/17/1996; Ord. O95-035, Amended, 12/19/1995; Ord. O95-014, Added, 07/18/1995)
Section 4. Corrections. The City Clerk and codifiers of this ordinance are authorized to make necessary corrections to this ordinance including, but not limited to, the correction of scrivener/clerical errors, references, ordinance numbering, section/subsection numbers and any references thereto.
Section 5. Ratification. Any act consistent with the authority and prior to the effective date of this ordinance is hereby ratified and affirmed.
Section 6. Severability. The provisions of this ordinance are declared separate and severable. The invalidity of any clause, sentence, paragraph, subdivision, section, or portion of this ordinance or the invalidity of the application thereof to any person or circumstance, shall not affect the validity of the remainder of the ordinance, or the validity of its application to other persons or circumstances.
Section 7. Effective Date. This ordinance shall become effective thirty (30) days after passage, approval, and publication as provided by law. ADOPTED this ______ day of ___________, 2017. CITY OF TUMWATER Pete Kmet, Mayor ATTEST: _______________________________ Melody Valiant, City Clerk APPROVED AS TO FORM: _______________________________
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Ordinance No. O2017-003 - Page 8 of 8
Karen Kirkpatrick, City Attorney Published: Effective Date:
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Attachment D: Draft Options for
Thurston County Planning Commission
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Tumwater UGA Zoning Ordinance (Title 22) Planning Commission Options
April 5, 2017
Option A: Amend the Tumwater UGA Zoning Ordinance (Title 22) to make it consistent with the current proposed City of Tumwater draft regulations. The Tumwater UGA Zoning Ordinance would be amended as follows: Section 22.04.080 Building Coverage. “Building coverage”. See “lot coverage,” Section 22.04.325. means the amount or percentage of ground area covered or occupied by buildings, usually expressed in square feet or percentage of the lot. Section 22.04.325 Lot Coverage. "Lot coverage" means the amount or percentage of ground area covered or occupied by impervious surface(s)building(s) usually expressed in square feet or percentage of land on the lot and measured horizontally at the foundation. 22.08.050 Density Regulations. … G. Lot coverage, maximum for all buildingsimpervious surface: 1. The maximum impervious surface for lots smaller than one acre is forty percent of the total
area of the lot or seven thousand five hundred square feet, whichever is less;, 2. The maximum impervious surface for lots between one acre and less than five acres is
seven thousand five hundred square feet plus an additional two thousand square feet for every additional acre in lot size, rounded to the nearest acre,
3. The maximum impervious surface for lots five acres and larger is fifteen thousand five
hundred square feet plus an additional three thousand square feet for every additional acre in lot size, rounded down to the nearest acre,
…
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Table 22.08.050(G) LOT COVERGE IMPERVIOUS SURFACE Please See 22.08.050(G) for Specific Standards
Acres Max Impervious Surface (in Sq. Ft.) 0.25 4,356 0.50 7,500 0.75 7,500 1.00 9,500 2.00 11,500 3.00 13,500 4.00 15,500 5.00 18,500 6.00 21,500 7.00 24,500 8.00 27,500 9.00 30,500 10.00 33,500
11.00+ See 22.08.050(G)
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Option B: Amend the Tumwater UGA Zoning Ordinance (Title 22) to revert back to the previous standard effective prior to December 2016. The Tumwater UGA Zoning Ordinance would be amended as follows:
22.08.050 - Density regulations. Density regulations in the RSR zone district are as follows: … G. Lot Coverage, Maximum for All Buildingsimpervious surface: forty percent of total area of the lot or seven thousand five hundred square feet, whichever is less; … Option C: No Changes would be made to the Tumwater UGA Zoning Ordiance. The current code reads as follows: 22.08.050 - Density regulations. Density regulations in the RSR zone district are as follows: … G. Lot Coverage, Maximum impervious surface: forty percent of total area of the lot or seven thousand five hundred square feet, whichever is less; …
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