Report SR 2.021-000 RECEIVED
NOV 02 2O2
CITY OF TIGARD C1eanWater Services
SENSITIVE AREA PRE-SCREENING SITE ASSEMTIVEriltrIoN
Clean Water Services File Number I 21-002031
1. Jurisdiction: Tigard
2. Property Information(example: 15234AB01400) 3. Owner Information
Tax lot ID(s): Name: TIGARD-TUALATIN SCHOOL DISTRICT
2S113B000300 Company:
Address: 6960 SW SANDBURG ST
OR Site Address: 8040 SW Durham Rd City, State,Zip: TIGARD,OR,97223
City, State,Zip: Tigard,Oregon,97224 Phone/fax: 5034314000
Nearest cross street: SW 79th Ave. Email:
4. Development Activity(check all that apply) 4. Applicant Information
❑ Addition to single family residence(rooms,deck,garage) Name: Mary Wiser
❑ Lot line adjustment 0 Minor land partition Company: Cardno
❑ Residential condominium ❑ Commercial condominium Address: 6720 S.Macadam Ave.,Suite 150
❑ Residential subdivision ❑ Commercial subdivision City, State,Zip: Portland, Oregon,97219
Single lot commercial ❑ Multi lot commercial Phone/fax: 5032003221
Other Email: mary.wiser@cardno.com
6. Will the project involve any off-site work? ❑Yes ❑ No 0 Unknown
Location and description of off-site work:
7. Additional comments or information that may be needed to understand your project:
Proposed 480 SF greenhouse at Creekside Community High School
This application does NOT replace Grading and Erosion Control Permits,Connection Permits,Building Permits,Site
Development Permits,DEQ 1200-C Permit or other permits as issued by the Department of Environmental Quality,
Department of State Lands and/or Department of the Army COE. All required permits and approvals must be obtained and
completed under applicable local,state,and federal law.
By signing this form, the Owner or Owner's authorized agent or representative, acknowledges and agrees that employees of Clean Water
Services have authority to enter the project site at all reasonable times for the purpose of inspecting project site conditions and gathering
information related to the project site. I certify that I am familiar with the information contained in this document, and to the best of my
knowledge and belief,this information is true,complete, and accurate.
Print/type name Mary Wiser Print/type title Senior Civil Project Designer
Signature ONLINE SUBMITTAL Date 7/7/2021
FOR DISTRICT USE ONLY
❑ Sensitive areas potentially exist on site or within 200'of the site.THE APPLICANT MUST PERFORM A SITE ASSESSMENT PRIOR TO
ISSUANCE OF A SERVICE PROVIDER LETTER. If Sensitive Areas exist on the site or within 200 feet on adjacent properties,a Natural
Resources Assessment Report may also be required.
❑ Based on review of the submitted materials and best available information sensitive areas do not appear to exist on site or within 200'of the
site.This Sensitive Area Pre-Screening Site Assessment does NOT eliminate the need to evaluate and protect water quality sensitive areas if
they are subsequently discovered.This document will serve as your Service Provider Letter as required by Resolution and Order 19-5,Section
3.02.1,as amended by Resolution and Order 19-22.All required permits and approvals must be obtained and completed under applicable
local,State and federal law.
X Based on review of the submitted materials and best available information the above referenced project will not significantly impact the
existing or potentially sensitive area(s)found near the site.This Sensitive Area Pre-Screening Site Assessment does NOT eliminate the need to
evaluate and protect additional water quality sensitive areas if they are subsequently discovered.This document will serve as your Service
Provider Letter as required by Resolution and Order 19-5,Section 3.02.1,as amended by Resolution and Order 19-22.All required permits and
approvals must be obtained and completed under applicable local,state and federal law.
O THIS SERVICE PROVIDER LETTER IS NOT VALID UNLESS CWS APPROVED SITE PLAN(S)ARE ATTACHED.
❑ The proposed activity does not meet the definition of development or the lot was platted after 9/9/95 ORS 92.040(2). NO SITE ASSESSMENT
OR SERVICE PROVIDER LETTER IS REQUIRED.
Reviewed by Date 8/10/21
Once complete,email to:SPLReview@cleanwaterservices.org • Fax: (503)681-4439
OR mail to: SPL Review,Clean Water Services,2550 SW Hillsboro Highway, Hillsboro,Oregon 97123
RECEIVED
NOV 0 2 2021
CITY OF TIGARD
TECHNICAL MEMORANDUM BUILDING DIVISION Li Cardna
Prepared For: Tigard-Tualatin School District
6720 S Macadam Ave.
From: Matt Lewis, PE Suite 150
Senior Principal—Land Development Portland,OR 97219
Date: 11/01/2021 Phone (503)419.2500
Fax (503)419-2600
Project: Creekside High School Greenhouse
Cardno#: 22116300 www.cardno.com
Re: Stormwater Management Memorandum
The proposed project is located at Creekside High School in Tigard, Oregon. This project includes
the construction of a greenhouse located south of the historic Durham Schoolhouse and next to the
Creekside High School courtyard.The proposed project creates 302 square feet of impervious area
and modifies 178 square feet of impervious area totaling 480 square feet.This project remains under
the 1,000 square foot threshold required by CWS, thus meeting the requirements outlined below.
Hydromodification
The proposed project will construct or modify 480 square feet of area.The runoff generated by these
improvements do not significantly increase the amount or rate of surface water runoff leaving the
site. This project does not meet the threshold requiring a hydromodification approach as outlined in r.
Chapter 4.03 of the CWS Manual.
Water Quality
The proposed project will construct or modify 480 square feet of area.The runoff generated by these
improvements do not significantly increase the amount or rate of surface water runoff leaving the
site.This project does not meet the threshold requiring water quality treatment as outlined in Chapter
4.04 of the CWS Manual.
Downstream Capacity
The total new impervious area for the site is 302 square feet thus a review of the Downstream
Conveyance System is not required as outlined in Chapter 2.04. The total stormwater runoff from
the site will negligibly increase compared to its existing condition.