1- Complete Stormwater 1200C Permit Combined.pdf

Department of Environmental Quality

Water Quality

Tina Kotek, Governor

December 10, 2025

Sharon Darroux City of St Helens

265 Strand St St Helens, Oregon 97051-2039

Re: 1200-C National Pollutant Discharge Elimination System (NPDES) Registration

Legal Name of Permit Registrant: City of St. Helens

Facility Name: St Helens Basin 4 and 6

Permit/PLC Number: NGEN12C-ORR10J817

Project Location; 2514 Sykes Rd, St Helens, Oregon 97051-2745 Columbia County

Dear Sharon Darroux:

The Oregon Department of Environmental Quality (DEQ) has reviewed your application and approved your registration for coverage under the NPDES 1200-C construction stormwater permit. As the registrant, you are legally responsible for compliance with all permit conditions; please follow this link, 1200-C Permit, for a copy of the permit.

Registrant Obligations

• Comply with all permit conditions. DEQ strongly recommends that you read the permit.

• Fully implement your Erosion and Sediment Control Plan (ESCP). You may need to modify site control measures as site conditions change.

• Ensure that all appropriate contractors hired by you to implement the permit on your behalf have a copy of the ESCP and the permit. Keep a list of all contractors working on your site along with their contact information.

• Notify DEQ of significant projects changes, including ESCP revisions, inspectors, or project ownership changes electronically through YDO.

• Perform & document visual monitoring according to Schedule B of the permit by a certified erosion and sediment control person.

• Terminate coverage at the end of the project electronically through YDO. You will be charged an annual registration fee until registration is terminated.

The permit does not authorize excavation or fill in state waterways, including wetlands, and does not replace the requirement for receiving authorization to do this type of work under Section 404 of the Clean Water Act. If the authorized activity involves earthmoving in a known or suspected wetland condition you must contact the Department of State Lands at 503-986-5200 if you are west of the Cascades, or 541-388- 6112 if you are east of the Cascades, and request a wetland determination prior to earth moving.

The construction stormwater general permit, technical assistance manuals and other information is also available on DEQ Stormwater Program’s website.

Sincerely, DEQ Stormwater Permitting Program https://www.oregon.gov/deq/FilterPermitsDocs/1200Cpermit.pdf https://ordeq-edms-public.govonlinesaas.com/pub/login?web=1 https://ordeq-edms-public.govonlinesaas.com/pub/login?web=1 https://www.oregon.gov/deq/wq/wqpermits/Pages/Stormwater-Construction.aspx https://www.oregon.gov/deq/wq/wqpermits/Pages/Stormwater-Contacts.aspx

Applicant Information Legal Name: City of St. Helens Project Name: St Helens Basin 4 and 6 Is the applicant the owner of the facility? Yes Permitting Action: Renewal Site Information Site Name: St Helens Basin 4 and 6 FIS RID: 315318 Location Address: 2514 Sykes Rd, St Helens, OR 97051-2745 (Columbia County) Permit Information Permit Number: NGEN12C-ORR10J817 Permit RID: 55930 Permit Type: NPDES Stormwater - GEN12C: 1200-C(1-<5), Stormwater; NPDES construction >=1 acre through <5 acres disturbed ground Permit Status: Issued Issued Date: 12/10/2025 Effective Date: 12/10/2025 Expiration Date: 12/10/2025 Permittee: City of St. Helens Required Information Has DEQ been provided the most recent version of the Erosion and Sediment Control Plan (ESCP)? Yes

Signature of Responsible Official I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

Signature: Sharon Darroux Submitted Date: 12/10/2025

Stormwater Construction - NPDES General Permit 1200-C

For stormwater discharges to surface waters from construction activities disturbing one acre or more that do not meet automatic coverage requirements

Department of Environmental Quality, State of Oregon

700 NE Multnomah Street, Suite 600 Portland, OR 97232-4100 1/27/2026

Submittal RID: 97977 Submitted Date: 12/10/2025

< Page: 1 of 1 >

Oregon Department of Environmental Quality

Land Use Compatibility Statement

What is a land use compatibility statement?

A LUCS is a form developed by DEQ to determine whether a DEQ permit or approval will be consistent with local government comprehensive plans and land use regulations.

Why is a LUCS required?

DEQ and other state agencies with permitting or approval activities that affect land use are required by Oregon law to be consistent with local comprehensive plans and have a process for determining consistency. DEQ activities affecting land use and the requirement for a LUCS may be found in Oregon Administrative Rules chapter 340, division 18.

When is a LUCS required?

A LUCS is required for nearly all DEQ permits and certain approvals of plans or related activities that affect land use prior to issuance of a DEQ permit or approval. These permits and activities are listed in section 1.D on p. 1 of the LUCS form. A single LUCS can be used if more than one DEQ permit or approval is being applied for concurrently.

Permit modifications or renewals also require a LUCS when any of the following applies:

1. Physical expansion on the property or proposed use of additional land

2. Alterations, expansions, improvements or changes in method or type of disposal at a solid waste disposal site as described in

3. A significant increase in discharges to water

4. A relocation of an outfall outside of the source property

5. Any physical change or change of operation of an air pollutant source that results in a net significant emission rate increase as defined in

How to complete a LUCS Step Who Does It? What Happens?

1 Applicant Applicant completes Section 1 of the LUCS and submits it to the appropriate city or county planning office.

2 City or County Planning Office*

City or county planning office completes Section 2 of the LUCS to indicate whether the activity or use is compatible with the acknowledged comprehensive plan and land use regulations, attaches written findings supporting the decision of compatibility, and returns the signed and dated LUCS to the applicant.

3 Applicant Applicant submits the completed LUCS and any supporting information provided by the city or county to DEQ along with the DEQ permit application or approval request.

* Review is needed by the city and county if both have jurisdiction.

Where to get help For questions about the LUCS process, contact the DEQ staff responsible for processing the permit or approval.

DEQ staff may be reached at 1-800-452-4011 (toll-free, inside Oregon) or 503-229-5630. For general questions, please contact DEQ land use staff.

Translation or other formats Tiếng Việt |усскийP|繁體中文 |어한국|Español| ةربیلع

800-452-4011 | TTY: 711 | deqinfo@deq.oregon.gov ا https://www.oregon.gov/deq/about-us/Pages/titleVIaccess.aspx https://www.oregon.gov/deq/about-us/Pages/titleVIaccess.aspx https://www.oregon.gov/deq/about-us/Pages/titleVIaccess.aspx https://www.oregon.gov/deq/about-us/Pages/titleVIaccess.aspx https://www.oregon.gov/deq/about-us/Pages/titleVIaccess.aspx https://www.oregon.gov/deq/about-us/Pages/titleVIaccess.aspx mailto:deqinfo@deq.state.or.us https://secure.sos.state.or.us/oard/displayDivisionRules.action?selectedDivision=1439 https://secure.sos.state.or.us/oard/displayDivisionRules.action?selectedDivision=1439 https://www.oregon.gov/deq/permits/pages/lucs.aspx

Oregon DEQ Land Use Compatibility Statement

Cultural resources protection laws Applicants involved in ground-disturbing activities should be aware of federal and state cultural resources protection laws. ORS 358.920 prohibits the excavation, injury, destruction, or alteration of an archeological site or object or removal of archeological objects from public and private lands without an archeological permit issued by the State Historic Preservation Office. 16 USC 470, Section 106, National Historic Preservation Act of 1966 requires a federal agency, prior to any undertaking, to consider the effect of the undertaking that is included on or eligible for inclusion in the National Register.

For further information, contact the State Historic Preservation Office or 503-986-0690.

Non-discrimination statement DEQ does not discriminate on the basis of race, color, national origin, disability, age, sex, religion, sexual orientation, gender identity, or marital status in the administration of its programs and activities. Visit DEQ’s Civil Rights and Environmental Justice page.

Oregon Department of Environmental Quality https://www.oregon.gov/oprd/oh/pages/default.aspx https://www.oregon.gov/deq/about-us/Pages/titleVIaccess.aspx

Oregon DEQ Land Use Compatibility Statement

SECTION 1 - TO BE COMPLETED BY APPLICANT

1A. Applicant Name: 1B. Project Name:

Contact Name: Physical Address:

Mailing Address: City, State, Zip:

City, State, Zip: Tax Lot #:

Telephone: Township: Range: Section:

Tax Account #: Latitude:

Longitude:

1C. Describe the project, include the type of development, business, or facility and services or products provided (attach additional information if necessary):

1D. Check the type of DEQ permit(s) or approval(s) being applied for at this time.

Air Quality Notice of Construction Hazardous Waste Treatment, Storage, or Disposal Permit

Air Contaminant Discharge Permit Pollution Control Bond Request

Clean Water State Revolving Fund Loan Application Air Quality Title V Permit Wastewater and Sewer Construction Plan and Air Quality Indirect Source Permit Specifications (new and modified systems)

Parking/Traffic Circulation Plan Water Quality NPDES Individual Permit

Solid Waste Land Disposal Site Permit Water Quality WPCF Individual Permit (for onsite construction-installation permits use the DEQ Onsite Solid Waste Treatment Facility Permit LUCS form)

Solid Waste Composting Facility Permit Water Quality NPDES Stormwater General Permit (1200-(includes Anaerobic Digester) A, 1200-C, 1200-CA, 1200-COLS, and 1200-Z)

Conversion Technology Facility Permit Water Quality General Permit (all general permits, except

Solid Waste Letter Authorization Permit 600, 700-PM, 1700-A, and 1700-B when they are mobile.)

Solid Waste Material Recovery Facility Permit Water Quality 401 Certification for federal permit or license Solid Waste Energy Recovery Facility Permit

Solid Waste Transfer Station Permit

Solid Waste - Waste Tire Storage Site Permit

Solid Waste Commingled Recycling Processing Facility Permit

Solid Waste Limited Sort Facility Permit

1E. This application is for: Permit Renewal New Permit Permit Modification Other:

Oregon Department of Environmental Quality Page 1 of 2

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CIVIL

EROSION AND SEDIMENT

CONTROL COVER SHEET

BTM

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C-05090% SUBMITTAL PRELIMINARY

NOT FOR

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Drawing Path and Name: A:\_V-W\Projects\OR\st. helens\2023\w233257or.00\12 CADD\12-5 sheets\W233257OR_C-050.dwg, Plotted Date: July 17, 2025 11:17 AM By: Nick McFaddin

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Engineer's Seal:

This document, ideas, and designs incorporated herein, are an instrument of professional service, and is not to be used, in whole or in part, for any other project without the written authorization of CONSOR.

Sub Consultant: Client / Owner: Project Title:

Sheet:

0 11/2 IF BAR DOES NOT MEASURE 1"

DRAWING IS NOT TO SCALE

Designed By:

Drawn By:

Checked By:

Approved By:

Consor Project No.:

Issued On:

CITY OF ST. HELENS

WASTEWATER SYSTEM CAPACITY

IMPROVEMENTS BASINS 4 AND 6

PROJECT NO. S-679

W233257OR

MAY 2025

Consultant:

EROSION AND SEDIMENT CONTROL PLAN

SHEET INDEX

EROSION AND SEDIMENT CONTROL PLANS

ATTENTION EXCAVATORS:

EXISTING SITE DESCRIPTION

CITY OF ST. HELENS ROADWAYS,

UNIMPROVED RIGHT-OF-WAY, EASEMENTS, AND

PUBLIC SPACE.

DEVELOPED CONDITIONS AND DESCRIPTION

PAVEMENT, PROPERTY AND PARK

RESTORATION FOLLOWING CONSTRUCTION OF

PIPE.

NATURE OF CONSTRUCTION ACTIVITY AND

ESTIMATED TIME TABLE

UTILITY INSTALLATION AND FINAL RESTORATION

JANUARY 2026 - DECEMBER 2027

TOTAL SITE AREA:

2.34 ACRES

TOTAL DISTURBED AREA:

2.34 ACRES (100%)

IMPERVIOUS SURFACE AREA:

EXISTING IMPERVIOUS AREA (TO REMAIN): 1.56 ACRES

ADDITIONAL PROPOSED IMPERVIOUS AREA: 0 ACRES

TOTAL POST DEVELOPMENT IMPERVIOUS AREA: 1.56 ACRES

CUT AND FILL DATA

ZERO CUT AND FILL ON THIS PROJECT. NO CHANGE TO

EXISTING GRADES AS PART OF PROJECT.

SOIL CLASSIFICATION:

MIOCENE GRANDE RONDE BASALT WITH MISSOULA FLOOD

DEPOSITS IN THE WESTERN EXENT OF THE PROJECT

RECEIVING WATER BODIES:

COLUMBIA RIVER, MULTNOMAH CHANNEL, SCAPPOOSE BAY,

MCNULTY CREEK AND MILTON CREEK.

303(D) IM PAIRMENT STATUS

MCNULTY CREEK - BIOLOGICAL CRITERIA.

MILTON CREEK - DISSOLVED OXYGEN AND TEMPERATURE

(BOTH YEAR ROUND)

MULTNOMAH CHANNEL - DDD4, 4, PCB'S

TEMPERATURE (YEAR ROUND)

THE LOWER COLUMBIA RIVER - ARSENIC, INORGANIC HUMAN

HEALTH TOXICS, DDE4, 4, AND PCB'S.

SCAPPOOSE BAY - PCB'S

NEAREST OFFICIAL RAIN GAUGE:

SCAPPOOSE, OREGON AGRIMET WEATHER STATION (SCPO)

HTTPS://USBR.GOV/PN/AGRIMET/AGRIMETMAP/SCPODA.HTML

GENERAL CONTRACTOR

TBD

PERSONNEL

(NAME/POSITION/RESPONSIBILITIES)

TBD PER SECTION 4.10 OF STATE OF OREGON DEQ GENERAL

PERMIT NPDES

NOTES:

1. ENGINEERED SOILS WILL NOT BE USED ON SITE.

2. AUTHORIZED NON-STORMWATER DISCHARGES THAT MAY

OCCUR INCLUDE PROPERLY MANAGED LANDSCAPE

IRRIGATION, WATER USED TO WASH EQUIPMENT AND

VEHICLES, AND WATER USED TO CONTROL DUST, FIRE

HYDRANT FLUSHING, AND POTABLE WATER LINE FLUSHING.

3. POLLUTANT-GENERATING ACTIVITIES MAY INCLUDE

HEAVY MACHINERY OPERATIONS, VEHICLE OPERATIONS,

STORAGE AND STOCKPILING OF MATERIALS, AND

CONSTRUCTION OF PROPOSED BUILDINGS AND UTILITIES,

PAVING. POLLUTANT-GENERATING ACTIVITIES WILL BE

LIMITED TO ON SITE WITHIN ESTABLISHED PERIMETER

CONTROLS.

NARRATIVE DESCRIPTIONS

OWNER NAME

CITY OF ST HELENS

265 STRAND STREET

ST. HELENS, OR 97051

CONTACT: SHARON DARROUX, PMP

PHONE: (503)-366-8243

EMAIL: SDARROUX@STHELENSOREGON.GOV

OREGON LAW REQUIRES YOU TO FOLLOW RULES ADOPTED BY THE OREGON UTILITY

NOTIFICATION CENTER. THOSE RULES ARE SET FORTH IN OAR 952-001-0010 THROUGH OAR

952-001-0090. YOU MAY OBTAIN COPIES OF THESE RULES FROM THE CENTER BY CALLING

503-232-1987. IF YOU HAVE ANY QUESTIONS ABOUT THE RULES, YOU MAY CONTACT THE

CENTER. YOU MUST NOTIFY THE CENTER AT LEAST TWO BUSINESS DAYS, BEFORE

COMMENCING AN EXCAVATION. CALL 503-246-6699.

CONSOR

ONE SW COLUMBIA STREET, SUITE 1700

PORTLAND, OR 97204

CONTACT: BILL EVONUK, PE

PHONE: (503)-225-9010

EMAIL: BILL.EVONUK@CONSORENG.COM

PLANNING / ENGINEERING /

SURVEYING FIRM

ASSOCIATED PERMITS

LAND USE FILE #

CUP.1.25

LOCATION MAP

SCALE: 1" = 500'

BASIN 6B

BASIN 6C

BASIN 6A

BASIN 6A

BASIN 4

VICINITY MAP

SCALE: 1" = 2000'

LOCATION MAP

SCALE: 1" = 500'

LOCATION MAP

SCALE: 1" = 500'

OLD

PORTLA

ND RD

BASIN 6

PROJECT

LOCATION

COLUMBIA RIVER

MUL

TN

OM

AH

CH

AN

NE

L

GABLE RD

COLUMBIA BLVD

S 1ST STS 12TH ST

MILLARD RD

PITTSBURG RD

MILTON CREEK

McNULTY CREEK

SCAPPOOSE

BAY

BASIN 4

PROJECT

LOCATION

BASIN 6C

PROJECT

LOCATION

PLYMOUTH ST

TUALATIN ST

S 4TH ST

PARK W

Y

S 6TH STS 9TH ST

S 17TH ST

S 16TH ST

S 18TH ST

KASTER RD

MILTON CREEK

OLD

PORTLA

ND RD

OLD

PORTLA

ND RD

PORT AVE

SYKES RD

GABLE RD

COLUMBIA BLVD

OLD

PORTLA

ND RD

MILT

ON W

Y

COLUMBIA BLVD

ST HELENS ST

CO

LU

MB

IA

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IV

ER

SHEET INDEX

DWG NAME DESCRIPTION

C-050 EROSION AND SEDIMENT CONTROL COVER SHEET

C-051 EROSION AND SEDIMENT CONTROL NOTES AND LEGEND

C-052 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA A-0+56 TO STA A9+00

C-053 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA A9+00 TO STA A18+20

C-054 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA A18+20 TO STA A26+80

C-055 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA A26+80 TO STA A35+40

C-056 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA A35+40 TO STA A44+60

C-060 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA B1+00 TO STA B10+00

C-061 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA B10+00 TO STA B18+00

C-062 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA B18+00 TO STA B26+40

C-063 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA B26+40 TO STA B30+92

C-064 BASIN 6 - EROSION AND SEDIMENT CONTROL PLAN STA C1+00 TO STA C5+60

C-065 BASIN 4 - EROSION AND SEDIMENT CONTROL PLAN STA D1+00 TO STA D9+20

C-066 BASIN 4 - EROSION AND SEDIMENT CONTROL PLAN STA D9+20 TO STA D16+40

C-067 BASIN 4 - EROSION AND SEDIMENT CONTROL PLAN STA D16+40 TO STA D24+20

C-068 BASIN 4 - EROSION AND SEDIMENT CONTROL PLAN STA D24+20 TO STA D32+60

C-069 BASIN 4 - EROSION AND SEDIMENT CONTROL PLAN STA D32+60 TO STA D40+80

C-070 BASIN 4 - EROSION AND SEDIMENT CONTROL PLAN STA D40+80 TO STA D46+80

C-071 BASIN 4 - EROSION AND SEDIMENT CONTROL PLAN STA D46+80 TO STA D50+69

C-072 EROSION AND SEDIMENT CONTROL DETAILS

BUSINESS DAYS/ HOURS

MONDAY 8:30 AM - 5 PM

TUESDAY 8:30 AM - 5 PM

WEDNESDAY 8:30 AM - 5 PM

THURSDAY 8:30 AM - 5 PM

FRIDAY 8:30 AM - 5 PM

SATURDAY NO WORK

SUNDAY NO WORK

1200-C

GEOTECHNICAL ENGINEER

SHANNON WILSON

3900 COLLINS WAY, SUITE 100

LAKE OSWEGOM, OR 97035-3437

CONTACT: KYLE ROMNEY, PE

PHONE: (503)-210-4768

EMAIL: KYLE.ROMNEY@SHANWIL.COM

CIVIL

EROSION AND SEDIMENT

CONTROL NOTES AND LEGEND

BTM

NEM

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C-05190% SUBMITTAL PRELIMINARY

NOT FOR

CONSTRUCTION

Drawing Path and Name: A:\_V-W\Projects\OR\st. helens\2023\w233257or.00\12 CADD\12-5 sheets\W233257OR_C-050.dwg, Plotted Date: July 3, 2025 4:49 PM By: Spencer Severance

1 2 3 4 5 6

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B

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Engineer's Seal:

This document, ideas, and designs incorporated herein, are an instrument of professional service, and is not to be used, in whole or in part, for any other project without the written authorization of CONSOR.

Sub Consultant: Client / Owner: Project Title:

Sheet:

0 11/2 IF BAR DOES NOT MEASURE 1"

DRAWING IS NOT TO SCALE

Designed By:

Drawn By:

Checked By:

Approved By:

Consor Project No.:

Issued On:

CITY OF ST. HELENS

WASTEWATER SYSTEM CAPACITY

IMPROVEMENTS BASINS 4 AND 6

PROJECT NO. S-679

W233257OR

MAY 2025

Consultant:

1. THE CITY WILL OBTAIN 1200-C PERMIT FROM DEQ AND WILL TRANSFER PERMIT TO

CONTRACTOR PRIOR TO CONSTRUCTION.

2. THE PERMIT REGISTRANT IS RESPONSIBLE FOR ALL ASPECTS OF PERMIT COMPLIANCE, THE

PERMIT REGISTRANT SHALL BE RESPONSIBLE FOR PROPER INSTALLATION, MONITORING,

MAINTENANCE, AND REMOVAL OF ALL EROSION PREVENTION AND SEDIMENT CONTROL

MEASURES, IN ACCORDANCE WITH THE CITY, STATE, AND FEDERAL REGULATIONS.

RESPONSIBILITY WILL CONTINUE UNTIL PERMANENT VEGETATION OR LANDSCAPE IS

COMPLETE. OWNER SHALL BE RESPONSIBLE FOR MAINTENANCE UNTIL THE FOLLOWING

CONDITIONS ARE MET: 1) THE PROJECT HAS BEEN ACCEPTED BY THE CITY; 2) TERMINATION

OF THE 1200-C PERMIT BY THE DEPARTMENT OF ENVIRONMENTAL QUALITY (DEQ).

3. INSTALLATION, MAINTENANCE, AND INSPECTION OF EROSION CONTROL MEASURES SHALL

FOLLOW REQUIREMENTS OF MULTNOMAH COUNTY STORMWATER MANAGEMENT MANUAL

APPENDIX C - EROSION PREVENTION AND SEDIMENT CONTROL (EPSC) MANUAL.

4. THE BOUNDARIES OF THE CLEARING LIMITS SHOWN ON THE EPSC PLAN SHALL BE CLEARLY

MARKED IN THE FIELD PRIOR TO CONSTRUCTION. DURING THE CONSTRUCTION PERIOD,

DISTURBANCE BEYOND THE CLEARING LIMITS MUST BE APPROVED BY THE OWNER OR AGENT

OR DESIGNEE. THE MARKINGS SHALL BE MAINTAINED BY THE OWNER OR AGENT OR

DESIGNEE FOR THE DURATION OF CONSTRUCTION.

5. THE EPSC BMPS SHOWN ON THE PLAN MUST BE CONSTRUCTED IN CONJUNCTION WITH ALL

CLEARING AND GRADING ACTIVITIES, IN ACCORDANCE WITH THE CONDITIONS OF APPROVAL,

PUBLIC WORKS STANDARDS, DEVELOPMENT CODE, AND IN SUCH A MANNER AS TO ENSURE

THAT SEDIMENT, SEDIMENT-LADEN WATER, AND OTHER POLLUTANTS DO NOT ENTER THE

DRAINAGE SYSTEM OR ROADWAYS, OR VIOLATE APPLICABLE WATER QUALITY STANDARDS.

6. THE EPSC BMPS SHOWN ON THE PLAN ARE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE

CONDITIONS. DURING THE CONSTRUCTION PERIOD, THE BMPS SHALL BE UPGRADED AS

NEEDED FOR UNEXPECTED STORM EVENTS AND TO ENSURE THAT SEDIMENT AND

SEDIMENT-LADEN WATER DO NOT LEAVE THE SITE.

7. AT NO TIME SHALL SEDIMENT BE ALLOWED TO ACCUMULATE MORE THAN ONE-THIRD THE

HEIGHT OF ANY SEDIMENT CONTROL BARRIER. TRAPPED SEDIMENTS SHALL BE REMOVED

FROM CATCH BASINS WHEN DESIGN CAPACITY HAS BEEN REDUCED BY 50 PERCENT. ALL

CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO PROJECT FINAL

INSPECTION. THE CLEANING OPERATION SHALL NOT FLUSH OR INTENTIONALLY WASH

SEDIMENT-LADEN WATER INTO THE DOWNSTREAM STORMWATER SYSTEM, STREAMS OR

DRAINAGEWAYS.

8. SEDIMENT THAT LEAVES THE SITE SHALL BE CLEANED UP WITHIN 24 HOURS AND PLACED

BACK ON THE SITE OR PROPERLY DISPOSED. ANY IN-STREAM CLEAN UP OF SEDIMENT SHALL

BE PERFORMED ACCORDING TO REQUIREMENTS OF THE U.S. ARMY CORPS OF ENGINEERS

AND THE OREGON DEPARTMENT OF STATE LANDS.

9. CATCH BASINS, AREA DRAINS, AND OTHER STORM SEWER INLETS SHALL BE PROTECTED

UNTIL PAVED SURFACES ARE COMPLETED AND PERMANENT VEGETATION HAS BEEN

ESTABLISHED.

10. STABILIZED GRAVEL ENTRANCES SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION

AND MAINTAINED FOR THE DURATION OF THE PROJECT. ADDITIONAL MEASURES MAY BE

REQUIRED TO ENSURE THAT ALL PAVED AREAS ARE KEPT CLEAN FOR THE DURATION OF THE

PROJECT.

11. CONCRETE WASHOUT LOCATION SHALL BE PROVIDED FOR WASHING OF CONCRETE TRUCKS

AND EQUIPMENT SO THAT CONCRETE SLURRY IS NOT WASHED INTO THE STORMWATER

SYSTEM, STREAMS, OR DRAINAGE WAYS. LOCATION SHALL BE COORDINATED IN THE FIELD

WITH THE OWNER.

12. GROUNDCOVER AND/OR SEEDING SHALL BE COMPLETED AS SOON AS PRACTICABLE FOR

EACH PHASE OF CONSTRUCTION AND NOT LATER THAN SEPTEMBER 1. IF FERTILIZERS ARE

USED TO ESTABLISH VEGETATION, THE APPLICATION RATES SHALL FOLLOW

MANUFACTURER'S GUIDELINES AND THE APPLICATION SHALL BE PERFORMED IN SUCH A WAY

TO MINIMIZE NUTRIENT-LADEN RUNOFF TO RECEIVING WATERS. THE PLAN SHALL STATE THE

CONDITIONS FOR DETERMINING SUCCESSFUL VEGETATION ESTABLISHMENT.

13. NON-STORMWATER POLLUTANT CONTROL MEASURES INCLUDING ANY USE OF TOXIC OR

OTHER HAZARDOUS MATERIALS SHALL INCLUDE PROPER STORAGE, SPILL CONTAINMENT,

APPLICATION, AND DISPOSAL.

14. PRIOR TO DISCONTINUING ACTIVITIES ON ANY PORTION OF THE SITE, ANY EXPOSED AREA

SHALL BE STABILIZED WITHIN 7 DAYS TO PREVENT EROSION. STABILIZATION MAY OCCUR BY

APPLYING APPROPRIATE COVER (E.G. MULCH, EROSION CONTROL BLANKETS, BINDERS,

TACKIFIERS) OR ESTABLISHING ADEQUATE VEGETATIVE COVER.

15. PRIOR TO FINAL PROJECT ACCEPTANCE BY THE CITY, THE SITE SHALL BE PERMANENTLY

STABILIZED (SEED AND MULCH OR TACKIFIER, OR PERMANENT LANDSCAPING).

16. THE OWNER OR AGENT IS RESPONSIBLE FOR REMOVING ALL SEDIMENT CONTROL MEASURES

ONCE PERMANENT STABILIZATION HAS BEEN ESTABLISHED. DEQ WILL NOT TERMINATE THE

1200-C PERMIT UNTIL PERMANENT VEGETATION IS ESTABLISHED.

17. STOCKPILE LOCATION SHALL BE COORDINATED WITH THE OWNER IF REQUIRED. STOCKPILED

SOIL SHALL BE COVERED WITH PLASTIC SHEETING OR STRAW MULCH. SEDIMENT FENCE OR

WATTLES ARE REQUIRED AROUND THE PERIMETER OF THE STOCKPILE, PER DET X.

1. ALL BASE ESC MEASURES (INLET PROTECTION, PERIMETER SEDIMENT

CONTROL, ETC.) MUST BE IN PLACE, FUNCTIONAL, AND APPROVED IN

AN INITIAL INSPECTION, PRIOR TO COMMENCEMENT OF

CONSTRUCTION ACTIVITIES.

2. ACTIVE INLETS TO STORM WATER SYSTEMS SHALL BE PROTECTED

THROUGH THE USE OF APPROVED INLET PROTECTION MEASURES.

ALL INLET PROTECTION MEASURES ARE TO BE REGULARLY

INSPECTED AND MAINTAINED AS NEEDED. ADDITIONAL INLETS NOT

SHOWN ON THIS PLAN MAY BE PRESENT.

3. FOR PAVEMENT AND SURFACE RESTORATION, SEE SHEETS C-101

THROUGH C-510.

4. PROTECT EXISTING LANDSCAPING. REPLACE DAMAGED

LANDSCAPING.

THE PERMITTEE IS REQUIRED TO MEET ALL THE CONDITIONS OF THE 1200-C PERMIT. THIS ESCP

AND GENERAL CONDITIONS HAVE BEEN DEVELOPED TO FACILITATE COMPLIANCE WITH THE

1200-C PERMIT REQUIREMENTS. IN CASES OF DISCREPANCIES OR OMISSIONS, THE 1200-C PERMIT

REQUIREMENTS SUPERCEDE REQUIREMENTS OF THIS PLAN.

COMPANY/AGENCY: TBD

PHONE: TBD

FAX: TBD

E-MAIL: TBD

DESCRIPTION OF EXPERIENCE: TBD

INSPECTION FREQUENCY:

A COMPREHENSIVE LIST OF AVAILABLE BEST MANAGEMENT PRACTICES (BMP) OPTIONS BASED ON DEQ's GUIDANCE MANUAL HAS BEEN REVIEWED TO COMPLETE THIS EROSION AND SEDIMENT

CONTROL PLAN. SOME OF THE ABOVE LISTED BMPS WERE NOT CHOSEN BECAUSE THEY WERE

DETERMINED TO NOT EFFECTIVELY MANAGE EROSION PREVENTION AND SEDIMENT CONTROL

FOR THIS PROJECT BASED ON SPECIFIC SITE CONDITIONS, INCLUDING SOIL CONDITIONS

TOPOGRAPHIC CONSTRAINTS, ACCESSIBILITY TO THE SITE, AND OTHER RELATED CONDITIONS, AS THE PROJECT PROGRESSES AND THERE IS A NEED TO REVISE THE ESC PLAN, AN ACTION PLAN

WILL BE SUBMITTED.

INITIAL

RATIONALE STATEMENT:

1. ONCE KNOWN, INCLUDE A LIST OF ALL CONTRACTORS THAT WILL ENGAGE IN CONSTRUCTION ACTIVITIES ON SITE, AND THE AREAS OF THE SITE WHERE THE CONTRACTOR(S) WILL ENGAGE IN CONSTRUCTION ACTIVITIES. REVISE THE LIST AS APPROPRIATE UNTIL PERMIT COVERAGE IS TERMINATED (SECTION 4.4.C.I). IN ADDITION, INCLUDE A LIST OF ALL PERSONNEL (BY NAME AND POSITION) THAT ARE RESPONSIBLE FOR THE DESIGN, INSTALLATION AND MAINTENANCE OF STORMWATER CONTROL MEASURES (E.G. ESCP DEVELOPER, BMP INSTALLER (SEE SECTION 4.10), AS WELL AS THEIR INDIVIDUAL RESPONSIBILITIES. (SECTION 4.4.C.II)

2. VISUAL MONITORING INSPECTION REPORTS MUST BE MADE IN ACCORDANCE WITH DEQ 1200-C PERMIT REQUIREMENTS. (SECTION 6.5)

3. INSPECTION LOGS MUST BE KEPT IN ACCORDANCE WITH DEQ'S 1200-C PERMIT REQUIREMENTS. (SECTION 6.5.Q)

4. RETAIN A COPY OF THE ESCP AND ALL REVISIONS ON SITE AND MAKE IT AVAILABLE ON REQUEST TO DEQ, AGENT, OR THE LOCAL MUNICIPALITY. (SECTION 4.7)

5. THE PERMIT REGISTRANT MUST IMPLEMENT THE ESCP. FAILURE TO IMPLEMENT ANY OF THE CONTROL MEASURES OR PRACTICES DESCRIBED IN THE ESCP IS A VIOLATION OF THE PERMIT.

(SECTIONS 4 AND 4.11)

6. THE ESCP MUST BE ACCURATE AND REFLECT SITE CONDITIONS. (SECTION 4.8)

7. SUBMISSION OF ALL ESCP REVISIONS IS NOT REQUIRED. SUBMITTAL OF THE ESCP REVISIONS IS ONLY UNDER SPECIFIC CONDITIONS. SUBMIT ALL NECESSARY REVISION TO DEQ OR

AGENT WITHIN 10 DAYS. (SECTION 4.9)

8. SEQUENCE CLEARING AND GRADING TO THE MAXIMUM EXTENT PRACTICAL TO PREVENT EXPOSED INACTIVE AREAS FROM BECOMING A SOURCE OF EROSION. (SECTION 2.2.2)

9. CREATE SMOOTH SURFACES BETWEEN SOIL SURFACE AND EROSION AND SEDIMENT CONTROLS TO PREVENT STORMWATER FROM BYPASSING CONTROLS AND PONDING. (SECTION 2.2.3)

10. IDENTIFY, MARK, AND PROTECT (BY CONSTRUCTION FENCING OR OTHER MEANS) CRITICAL RIPARIAN AREAS AND VEGETATION INCLUDING IMPORTANT TREES AND ASSOCIATED ROOTING

ZONES, AND VEGETATION AREAS TO BE PRESERVED. IDENTIFY VEGETATIVE BUFFER ZONES BETWEEN THE SITE AND SENSITIVE AREAS (E.G., WETLANDS), AND OTHER AREAS TO BE

PRESERVED, ESPECIALLY IN PERIMETER AREAS. (SECTION 2.2.1)

11. PRESERVE EXISTING VEGETATION WHEN PRACTICAL AND RE-VEGETATE OPEN AREAS. RE-VEGETATE OPEN AREAS WHEN PRACTICABLE BEFORE AND AFTER GRADING OR CONSTRUCTION.

IDENTIFY THE TYPE OF VEGETATIVE SEED MIX USED. (SECTION 2.2.5) ALL DISTURBED SOILS WILL BE RE-SEEDED UPON CONSTRUCTION COMPLETION.

12. MAINTAIN AND DELINEATE ANY EXISTING NATURAL BUFFER WITHIN THE 50-FEET OF WATERS OF THE STATE. (SECTION 2.2.4)

13. INSTALL PERIMETER SEDIMENT CONTROL, INCLUDING STORM DRAIN INLET PROTECTION AS WELL AS ALL SEDIMENT BASINS, TRAPS, AND BARRIERS PRIOR TO LAND DISTURBANCE.

(SECTIONS 2.1.3)

14. CONTROL BOTH PEAK FLOW RATES AND TOTAL STORMWATER VOLUME, TO MINIMIZE EROSION AT OUTLETS AND DOWNSTREAM CHANNELS AND STREAM BANKS. (SECTIONS 2.1.1. AND

2.2.16)

15. CONTROL SEDIMENT AS NEEDED ALONG THE SITE PERIMETER AND AT ALL OPERATIONAL INTERNAL STORM DRAIN INLETS AT ALL TIMES DURING CONSTRUCTION, BOTH INTERNALLY AND

AT THE SITE BOUNDARY. (SECTIONS 2.2.6 AND 2.2.13)

16. ESTABLISH CONCRETE TRUCK AND OTHER CONCRETE EQUIPMENT WASHOUT AREAS BEFORE BEGINNING CONCRETE WORK. (SECTION 2.2.14)

17. APPLY TEMPORARY AND/OR PERMANENT SOIL STABILIZATION MEASURES IMMEDIATELY ON ALL DISTURBED AREAS AS GRADING PROGRESSES. TEMPORARY OR PERMANENT

STABILIZATIONS MEASURES ARE NOT REQUIRED FOR AREAS THAT ARE INTENDED TO BE LEFT UNVEGETATED, SUCH AS DIRT ACCESS ROADS OR UTILITY POLE PADS.(SECTIONS 2.2.20 AND 2.2.21)

18. ESTABLISH MATERIAL AND WASTE STORAGE AREAS, AND OTHER NON-STORMWATER CONTROLS. (SECTION 2.3.7)

19. KEEP WASTE CONTAINER LIDS CLOSED WHEN NOT IN USE AND CLOSE LIDS AT THE END OF THE BUSINESS DAY FOR THOSE CONTAINERS THAT ARE ACTIVELY USED THROUGHOUT THE

DAY. FOR WASTE CONTAINERS THAT DO NOT HAVE LIDS, PROVIDE EITHER (1) COVER (E.G., A TARP, PLASTIC SHEETING, TEMPORARY ROOF) TO PREVENT EXPOSURE OF WASTES TO PRECIPITATION, OR (2) A SIMILARLY EFFECTIVE MEANS DESIGNED TO PREVENT THE DISCHARGE OF POLLUTANTS (E.G., SECONDARY CONTAINMENT). (SECTION 2.3.7)

20. PREVENT TRACKING OF SEDIMENT ONTO PUBLIC OR PRIVATE ROADS USING BMPS SUCH AS: CONSTRUCTION ENTRANCE, GRAVELED (OR PAVED) EXITS AND PARKING AREAS, GRAVEL ALL UNPAVED ROADS LOCATED ONSITE, OR USE AN EXIT TIRE WASH. THESE BMPS MUST BE IN PLACE PRIOR TO LAND- DISTURBING ACTIVITIES. (SECTION 2.2.7)

21. WHEN TRUCKING SATURATED SOILS FROM THE SITE, EITHER USE WATER-TIGHT TRUCKS OR DRAIN LOADS ON SITE. (SECTION 2.2.7.F)

22. CONTROL PROHIBITED DISCHARGES FROM LEAVING THE CONSTRUCTION SITE, I.E., CONCRETE WASH-OUT, WASTEWATER FROM CLEANOUT OF STUCCO, PAINT AND CURING COMPOUNDS.

(SECTIONS 1.5 AND 2.3.9)

23. ENSURE THAT STEEP SLOPE AREAS WHERE CONSTRUCTION ACTIVITIES ARE NOT OCCURRING ARE NOT DISTURBED. (SECTION 2.2.10)

24. PREVENT SOIL COMPACTION IN AREAS WHERE POST-CONSTRUCTION INFILTRATION FACILITIES ARE TO BE INSTALLED. (SECTION 2.2.12)

25. USE BMPS TO PREVENT OR MINIMIZE STORMWATER EXPOSURE TO POLLUTANTS FROM SPILLS; VEHICLE AND EQUIPMENT FUELING, MAINTENANCE, AND STORAGE; OTHER CLEANING AND

MAINTENANCE ACTIVITIES; AND WASTE HANDLING ACTIVITIES. THESE POLLUTANTS INCLUDE FUEL, HYDRAULIC FLUID, AND OTHER OILS FROM VEHICLES AND MACHINERY, AS WELL AS DEBRIS, FERTILIZER, PESTICIDES AND HERBICIDES, PAINTS, SOLVENTS, CURING COMPOUNDS AND ADHESIVES FROM CONSTRUCTION OPERATIONS. (SECTIONS 2.2.15 AND 2.3) HEAVY EQUIPMENT MUST BE STORED, FUELED, AND MAINTAINED A MINIMUM OF 150 FEET AWAY FROM STREAMS OR PLACED IN DESIGNATED HARD ZONES.

26. PROVIDE PLANS FOR SEDIMENTATION BASINS THAT HAVE BEEN DESIGNED PER SECTION 2.2.17 AND STAMPED BY AN OREGON PROFESSIONAL ENGINEER. (SEE SECTION 2.2.17.A)

27. IF ENGINEERED SOILS ARE USED ON SITE, A SEDIMENTATION BASIN/IMPOUNDMENT MUST BE INSTALLED. (SEE SECTIONS 2.2.17 AND 2.2.18)

28. PROVIDE A DEWATERING PLAN FOR ACCUMULATED WATER FROM PRECIPITATION AND UNCONTAMINATED GROUNDWATER SEEPAGE DUE TO SHALLOW EXCAVATION ACTIVITIES. (SEE

SECTION 2.4)

29. IMPLEMENT THE FOLLOWING BMPS WHEN APPLICABLE: WRITTEN SPILL PREVENTION AND RESPONSE PROCEDURES, EMPLOYEE TRAINING ON SPILL PREVENTION AND PROPER DISPOSAL

PROCEDURES, SPILL KITS IN ALL VEHICLES, REGULAR MAINTENANCE SCHEDULE FOR VEHICLES AND MACHINERY, MATERIAL DELIVERY AND STORAGE CONTROLS, TRAINING AND SIGNAGE, AND COVERED STORAGE AREAS FOR WASTE AND SUPPLIES. (SECTION 2.3)

30. USE WATER, SOIL-BINDING AGENT OR OTHER DUST CONTROL TECHNIQUE AS NEEDED TO AVOID WIND-BLOWN SOIL. (SECTION 2.2.9)

31. THE APPLICATION RATE OF FERTILIZERS USED TO REESTABLISH VEGETATION MUST FOLLOW MANUFACTURER'S RECOMMENDATIONS TO MINIMIZE NUTRIENT RELEASES TO SURFACE

WATERS. EXERCISE CAUTION WHEN USING TIME-RELEASE FERTILIZERS WITHIN ANY WATERWAY RIPARIAN ZONE. (SECTION 2.3.5)

32. IF AN ACTIVE TREATMENT SYSTEM (FOR EXAMPLE, ELECTRO-COAGULATION, FLOCCULATION, FILTRATION, ETC.) FOR SEDIMENT OR OTHER POLLUTANT REMOVAL IS EMPLOYED, SUBMIT AN

OPERATION AND MAINTENANCE PLAN (INCLUDING SYSTEM SCHEMATIC, LOCATION OF SYSTEM, LOCATION OF INLET, LOCATION OF DISCHARGE, DISCHARGE DISPERSION DEVICE DESIGN, AND A SAMPLING PLAN AND FREQUENCY) BEFORE OPERATING THE TREATMENT SYSTEM. OBTAIN ENVIRONMENTAL MANAGEMENT PLAN APPROVAL FROM DEQ BEFORE OPERATING THE TREATMENT SYSTEM. OPERATE AND MAINTAIN THE TREATMENT SYSTEM ACCORDING TO MANUFACTURER'S SPECIFICATIONS. (SECTION 1.2.9)

33. TEMPORARILY STABILIZE SOILS AT THE END OF THE SHIFT BEFORE HOLIDAYS AND WEEKENDS, IF NEEDED. THE REGISTRANT IS RESPONSIBLE FOR ENSURING THAT SOILS ARE STABLE

DURING RAIN EVENTS AT ALL TIMES OF THE YEAR. (SECTION 2.2)

34. AS NEEDED BASED ON WEATHER CONDITIONS, AT THE END OF EACH WORKDAY SOIL STOCKPILES MUST BE STABILIZED OR COVERED, OR OTHER BMPS MUST BE IMPLEMENTED TO PREVENT DISCHARGES TO SURFACE WATERS OR CONVEYANCE SYSTEMS LEADING TO SURFACE WATERS. (SECTION 2.2.8)

35. SEDIMENT FENCE: REMOVE TRAPPED SEDIMENT BEFORE IT REACHES ONE THIRD OF THE ABOVE GROUND FENCE HEIGHT AND BEFORE FENCE REMOVAL. (SECTION 2.1.5.B)

36. OTHER SEDIMENT BARRIERS (SUCH AS BIOBAGS): REMOVE SEDIMENT BEFORE IT REACHES TWO INCHES DEPTH ABOVE GROUND HEIGHT AND BEFORE BMP REMOVAL. (SECTION 2.1.5.C)

37. CATCH BASINS: CLEAN BEFORE RETENTION CAPACITY HAS BEEN REDUCED BY FIFTY PERCENT. SEDIMENT BASINS AND SEDIMENT TRAPS: REMOVE TRAPPED SEDIMENTS BEFORE DESIGN

CAPACITY HAS BEEN REDUCED BY FIFTY PERCENT AND AT COMPLETION OF PROJECT. (SECTION 2.1.5.D)

38. WITHIN 24 HOURS, SIGNIFICANT SEDIMENT THAT HAS LEFT THE CONSTRUCTION SITE, MUST BE REMEDIATED. INVESTIGATE THE CAUSE OF THE SEDIMENT RELEASE AND IMPLEMENT STEPS

TO PREVENT A RECURRENCE OF THE DISCHARGE WITHIN THE SAME 24 HOURS. ANY IN-STREAM CLEAN-UP OF SEDIMENT SHALL BE PERFORMED ACCORDING TO THE OREGON

DEPARTMENT OF STATE LANDS REQUIRED TIMEFRAME. (SECTION 2.2.19.A)

39. THE INTENTIONAL WASHING OF SEDIMENT INTO STORM SEWERS OR DRAINAGE WAYS MUST NOT OCCUR. VACUUMING OR DRY SWEEPING AND MATERIAL PICKUP MUST BE USED TO

CLEANUP RELEASED SEDIMENTS. (SECTION 2.2.19)

40. DOCUMENT ANY PORTION(S) OF THE SITE WHERE LAND DISTURBING ACTIVITIES HAVE PERMANENTLY CEASED OR WILL BE TEMPORARILY INACTIVE FOR 14 OR MORE CALENDAR DAYS.

(SECTION 6.5.F.)

41. PROVIDE TEMPORARY STABILIZATION FOR THAT PORTION OF THE SITE WHERE CONSTRUCTION ACTIVITIES CEASE FOR 14 DAYS OR MORE WITH A COVERING OF BLOWN STRAW AND A TACKIFIER, LOOSE STRAW, OR AN ADEQUATE COVERING OF COMPOST MULCH UNTIL WORK RESUMES ON THAT PORTION OF THE SITE. (SECTION 2.2.20)

42. DO NOT REMOVE TEMPORARY SEDIMENT CONTROL PRACTICES UNTIL PERMANENT VEGETATION OR OTHER COVER OF EXPOSED AREAS IS ESTABLISHED. ONCE CONSTRUCTION IS COMPLETE AND THE SITE IS STABILIZED, ALL TEMPORARY EROSION CONTROLS AND RETAINED MOVED AND DISPOSED OF PROPERLY, UNLESS NEEDED FOR LONG TERM USE FOLLOWING

TERMINATION OF PERMIT COVERAGE. (SECTION 2.2.21)

43. ALL CONSTRUCTION EQUIPMENT MUST BE INSPECTED AND CLEANED BEFORE ARRIVING ON-SITE.

PERMITTEE'S SITE INSPECTOR:

REFER TO DEQ GUIDANCE MANUAL FOR A COMPREHENSIVE LIST OF AVAILABLE BMP'S

BMP MATRIX FOR CONSTRUCTION PHASES:

STANDARD EROSION AND SEDIMENT CONTROL PLAN DRAWING NOTES:

SITE CONDITION MINIMUM FREQUENCY

1. ACTIVE PERIOD ON INITIAL DATE THAT LAND DISTURBANCE ACTIVITIES COMMENCE. WITHIN 24 HOURS OF ANY STORM EVENT, INCLUDING RUNOFF FROM SNOW MELT, THAT RESULTS IN DISCHARGE FROM SITE. AT LEAST ONCE EVERY 14 DAYS, REGARDLESS OF WHETHER STORMWATER RUNOFF IS OCCURRING.

2. INACTIVE PERIODS GREATER THAN FOURTEEN

(14) CONSECUTIVE CALENDAR DAYS

THE INSPECTOR MAY REDUCE THE FREQUENCY OF INSPECTIONS IN ANY AREA OF THE SITE WHERE THE STABILIZATION STEPS IN SECTION 2.2.20 HAVE BEEN COMPLETED TO TWICE PER MONTH FOR THE FIRST MONTH, NO LESS THAN 14

CALENDAR DAYS APART, THEN ONCE PER MONTH.

3. PERIODS DURING WHICH THE SITE IS

INACCESSIBLE DUE TO INCLEMENT WEATHER

IF SAFE, ACCESSIBLE AND PRACTICAL, INSPECTIONS MUST OCCUR DAILY AT A RELEVANT DISCHARGE POINT OR

DOWNSTREAM LOCATION OF THE RECEIVING WATERBODY.

4. PERIODS DURING WHICH CONSTRUCTION

ACTIVITIES ARE SUSPENDED AND RUNOFF IS

UNLIKELY DUE TO FROZEN CONDITIONS.

VISUAL MONITORING INSPECTIONS MAY BE TEMPORARILY SUSPENDED. IMMEDIATELY RESUME MONITORING UPON

THAWING, OR WHEN WEATHER CONDITIONS MAKE DISCHARGES LIKELY.

5. PERIODS DURING WHICH CONSTRUCTION

ACTIVITIES ARE CONDUCTED AND RUNOFF IS

UNLIKELY DURING FROZEN CONDITIONS.

VISUAL MONITORING INSPECTIONS MAY BE REDUCED TO ONCE A MONTH. IMMEDIATELY RESUME MONITORING UPON

THAWING, OR WHEN WEATHER CONDITIONS MAKE DISCHARGES LIKELY.

(REFERENCED FROM THE OREGON STORMWATER MANUAL)

* HOLD A PRE-CONSTRUCTION MEETING OF PROJECT CONSTRUCTION PERSONNEL THAT INCLUDES THE INSPECTOR TO DISCUSS EROSION AND SEDIMENT CONTROL MEASURES, CONSTRUCTION LIMITS, AND DEQ

1200-C PERMIT CONDITIONS.

* ALL INSPECTIONS MUST BE MADE IN ACCORDANCE WITH DEQ 1200-C PERMIT REQUIREMENTS.

* INSPECTION LOGS MUST BE KEPT IN ACCORDANCE WITH DEQ'S 1200-C PERMIT REQUIREMENTS.

* RETAIN A COPY OF THE ESCP AND ALL REVISIONS ON SITE AND MAKE IT AVAILABLE ON REQUEST TO DEQ, AGENT, OR THE LOCAL MUNICIPALITY. DURING INACTIVE PERIODS OF GREATER THAN SEVEN (7) CONSECUTIVE CALENDAR DAYS, RETAIN THE ESCP AT THE CONSTRUCTION SITE OR AT ANOTHER LOCATION.

PHASE/BMP CLEARING UTILITY

INSTALLATION

STREET

PAVING

FINAL

STABILIZATION

EROSION PREVENTION

GROUND COVER X X

PLASTIC SHEETING X X

MATTING X X X

DUST CONTROL X X X

TEMPORARY

STABILIZATION X X

PERMANENT

STABILIZATION X

BUFFER ZONE X X X

SEDIMENT CONTROL

*SEDIMENT FENCE X X X

*STRAW WATTLES X X X

*INLET PROTECTION X X X

DEWATERING

(GENERAL) X

RUN-OFF CONTROL

*EXISTING OUTLET

PROTECTION X X X

NEW OUTLET

PROTECTION X X

EXISTING CURB INLET

CHECK DAMS X X X

POLLUTION PREVENTION

PROPER SIGNAGE X X X X

HAZARD WASTE

MANAGEMENT X X X

SPILL KIT ON-SITE X X X

CONCRETE WASH

OUT AREA X X X

*BMP TO BE INSTALLED BEFORE ANY GROUND DISTURBANCE

BIO FILTER BAG, SEE DET, SHT C-072

WATTLE, SEE DET, SHT C-072

DRAINAGE FLOW DIRECTION

SEDIMENT FENCING, SEE DET, SHT C-072

EXISTING 1' CONTOURS

EXISTING 5' CONTOURS

LEGEND

XX

XX

SHEET NOTES NOTES

SS

UNKNOWN

OUT

EX STM CB

RIM: 65.72

IE IN: 62.47 (12"NE)

IE OUT: 62.44 (12"SW)

EX STM AD *LYNCH STYLE*

RIM: 65.24

BOT OF BOX:62.49

WATER LEVEL:62.95

IE IN: 63.13 (SE 8")

IE OUT: 62.95

SUMP: 65.24

EX 12" DI

CULVERT

IE: 61.76

EX STM CB

RIM: 63.22

IE OUT: 61.12 (8"S)

SUMP: 60.80

6"

SS

4"

SS

64 66

67 66

SS

901 PORT AVE

EXIST FENCE.

APPROX. LOCATION

15" DBH

6" DBH

6", 7" & 8" DBH 8" DBH

R/W

R/W

R/W

R/W

R/W

R/W

R/W

4"HP STL G

"D

I S D

OV

HD

OVHD

OVHD

OV

HD

OVHD

OVHD

OVHD

OVHD

OVHD

OV

HD

OV

HD

COM

COM

COM

4"HP STL G

4"HP STL G

4"

HP

S

TL

G

4"

HP

S

TL

G

14"W

W

W

WW

WW

W

A-0+42

A0+00

A1+00

A2+00 A3+00 A4+00

27"PVC SS

SS

SS

EX 12" CMP

CULVERT

IE: 64.12

EX 12" SD

IE: 63.09

EX STM CB

RIM: 67.06

IE OUT: 67.06 (10"NE)

SUMP: 67.06

EX STM MH

RIM: 67.70

IE IN: 65.01 (12"NW)

IE OUT: 64.15 (18"SW)

SD

777 PORT AVE

SS

END OF HP GAS

16", 18" &

20" DBH

22" DBH

12" DBH

20" DBH

WATER 4 (INTERMITTENT)

WETLAND B BOUNDARY

8" DBH

7" DBH

6", 6" & 7" DBH

8" DBH

12" DI

R/W

R/W

R/W

R/W

COM

COM

4"HP STL G

SD

G

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I S D

COM

15"CONC SS

15"CONC SS

8"

SS

14"W

14"W

14"W

14"W

14"W

SS

A5+00

A6+00

A7+00

A8+00 A9+00

SS

SS

27"PVC SS

27"PVC SS

27"PVC SS

90% SUBMITTAL PRELIMINARY

NOT FOR

CONSTRUCTION

Drawing Path and Name: A:\_V-W\Projects\OR\st. helens\2023\w233257or.00\12 CADD\12-5 sheets\W233257OR_C-052.dwg, Plotted Date: July 3, 2025 4:51 PM By: Spencer Severance

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Engineer's Seal:

This document, ideas, and designs incorporated herein, are an instrument of professional service, and is not to be used, in whole or in part, for any other project without the written authorization of CONSOR.

Sub Consultant: Client / Owner: Project Title:

Sheet:

0 11/2 IF BAR DOES NOT MEASURE 1"

DRAWING IS NOT TO SCALE

Designed By:

Drawn By:

Checked By:

Approved By:

Consor Project No.:

Issued On:

CITY OF ST. HELENS

WASTEWATER SYSTEM CAPACITY

IMPROVEMENTS BASINS 4 AND 6

PROJECT NO. S-679

W233257OR

MAY 2025

Consultant:

CIVIL

EROSION AND SEDIMENT

CONTROL PLAN

STA A1+00 TO STA A9+00

BTM

NEM

WSE

BVO

C-052

BASIN 6

PLAN

SCALE: 1"=20'

M A

TC

H

LI

N

E S

TA

A

4+

SE

E

BE

LO

W

PORT AVE

O

LD

PO

R

TLAN

D

R D

EXIST LOG

LANDSCAPE

BORDER

EXIST LOG

LANDSCAPE

BORDER

PLAN

SCALE: 1"=20'

M A

TC

H

LI

N

E S

TA

A

9+

SE

E

SH

EE

T C-

PORT AVE

M

AT

C H

LI

N

E

ST

A A4

+8

SE

E

AB

OV

E

BIO FILTER BAG, SEE DET, SHT C-072

WATTLE, SEE DET, SHT C-072

DRAINAGE FLOW DIRECTION

SEDIMENT FENCING, SEE DET, SHT C-072

EXISTING 1' CONTOURS

EXISTING 5' CONTOURS

LEGEND

NOTES:

1. SEDIMENTATION MANHOLES: MONITOR SEDIMENTATION

MANHOLES AND REMOVE ACCUMULATED SEDIMENTS IF

CAPACITY HAS BEEN REDUCED BY FIFTY PERCENT AND AT

COMPLETION OF PROJECT.

2. ALL PROJECT VEHICLES SHALL BE SUPPLIED WITH A SPILL

KIT, INCLUDING SEVERAL SPILL BLOCKING MATS TO

PREVENT WATER FROM ENTERING AN INLET. IN THE

EVENT OF A SPILL, THE SPILL BLOCKING MATS SHALL BE

DEPLOYED AT ALL INLETS CONNECTED TO EITHER A

SEDIMENTATION MANHOLE OR DRY WELL. A VACTOR

TRUCK SHALL BE USED TO REMOVE ANY STORM WATER

ACCUMULATING IN THE STREET DURING DEPLOYMENT OF

THE MATS.

3. ANY NEEDED DEWATERING ACTIVITIES SHALL ENSURE

STORM WATER IS CLEAN AND FREE OF SEDIMENT,

SURFACTANTS, AND OTHER POLLUTANTS. TURBIDITY

MONITORING OF STORM WATER REMOVED FROM TRENCH

SHALL ENSURE LEVELS ARE NON-VISIBLY TURBID, WHICH

WILL BE ACCOMPLISHED BY USING AN APPROPRIATE

SEDIMENT FILTRATION METHOD. IF THE CHOSEN METHOD

IS NOT MEETING TURBIDITY LEVEL, A DIFFERENT

FILTRATION METHOD SHALL BE SELECTED OR, IF NEEDED,

THE DEWATERING MAY BE DISCHARGED TO SANITARY

SEWER WITH PRIOR APPROVAL OBTAINED FROM THE CITY

OF ST. HELENS.

4. WET VACUUM TO BE USED DURING ASPHALT SAW CUTTING

TO PREVENT SLURRY DISCHARGE.

5. DO NOT DISTURB GROUND WITHIN WETLAND AREA.

6. AREA DRAINS LOCATED BEHIND CURB AND SIDEWALK DO

NOT NEED PROTECTED.

FURNISH & INSTALL:

INLET PROTECTION PER

DETS ON SHT C-072, TYP

AutoCAD SHX Text W

EX STM CO

RIM: 83.80

IE BEND: 78±

EX STM CB

RIM: 80.81

IE OUT: 78.65 (10"NE)

SUMP: 77.25

EX STM MH

RIM: 81.44

IE IN: 76.82 (10"SW)

IE IN: 76.68 (12"NW)

IE OUT: 76.56 (12"SE)

EX STM CO

RIM: 80.09

IE BEND: 77±EX STM CO

RIM: 77.96

IE BEND: 75±

EX STM CO

RIM: 78.05

IE BEND: 74±

SD

75 80

76 77 78 79

81 82

201 PORT AVE

END OF 2" GAS

300 PORT AVE

R/W

R/W

R/W

R/W

R/W

SDSDSD

COM

COM

CO

M

COM

COM

COM

COM

COM

COM

2"

PO

LY

G

15"CONC SS15"CONC SS

W

WW

SS

A14+00 A15+00 A16+00 A17+00 A18+00

27"PVC SS27"PVC SS

SS

EX STM CB

RIM: 72.28

IE OUT: 70.43 (10"NE)

SUMP: 68.78

EX STM CO

RIM: 75.83

*UNABLE TO OPEN*

EX STM MH

RIM: 70.95

IE IN: 66.57 (12"NW)

IE OUT: 66.51 (12"SE)

EX 12" CMP

CULVERT

IE: 66.40

EX 12" CMP

CULVERT

IE: 65.53

EX 12" CMP

CULVERT

IE: 65.80

EX 12" CMP

CULVERT

IE: 65.43

SD

70 71 72 73 74

EX 12" CMP

CULVERT

(NOT SURVEYED)

800 PORT AVE

R/W

R/WR/W

R/W

R/W

R/W

W

EE

SDSDSD

"S

S

E

COM

COM

COM

COM

COM

COMCOM

15"CONC SS15"CONC SS

W

W

W14"W

SS

A9+00

A10+00

A11+00 A12+00 A13+00

SS 27"PVC SS27"PVC SS27"PVC SS

12" SD

90% SUBMITTAL PRELIMINARY

NOT FOR

CONSTRUCTION

Drawing Path and Name: A:\_V-W\Projects\OR\st. helens\2023\w233257or.00\12 CADD\12-5 sheets\W233257OR_C-052.dwg, Plotted Date: July 3, 2025 4:51 PM By: Spencer Severance

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D

Engineer's Seal:

This document, ideas, and designs incorporated herein, are an instrument of professional service, and is not to be used, in whole or in part, for any other project without the written authorization of CONSOR.

Sub Consultant: Client / Owner: Project Title:

Sheet:

0 11/2 IF BAR DOES NOT MEASURE 1"

DRAWING IS NOT TO SCALE

Designed By:

Drawn By:

Checked By:

Approved By:

Consor Project No.:

Issued On:

CITY OF ST. HELENS

WASTEWATER SYSTEM CAPACITY

IMPROVEMENTS BASINS 4 AND 6

PROJECT NO. S-679

W233257OR

MAY 2025

Consultant:

CIVIL

EROSION AND SEDIMENT

CONTROL PLAN

STA A9+00 TO STA A18+20

BTM

NEM

WSE

BVO

C-053

BASIN 6

PLAN

SCALE: 1"=20'

M A

TC

H

LI

N

E S

TA

A

+2

SE

E

SH

EE

T

C-

PORT AVE

PLAN

SCALE: 1"=20'

M A

TC

H

LI

N

E S

TA

3+

SE

E

BE

LO

W

M A

TC

H

LI

N

E S

TA

A

9+

SE

E

SH

EE

T C-

PORT AVE

M A

TC

H

LI

N

E S

TA

3+

SE

E

AB

OV

E

BIO FILTER BAG, SEE DET, SHT C-072

WATTLE, SEE DET, SHT C-072

DRAINAGE FLOW DIRECTION

SEDIMENT FENCING, SEE DET, SHT C-072

EXISTING 1' CONTOURS

EXISTING 5' CONTOURS

LEGEND

FURNISH & INSTALL:

INLET PROTECTION PER

DETS ON SHT C-072, TYP

NOTES:

1. SEDIMENTATION MANHOLES: MONITOR SEDIMENTATION

MANHOLES AND REMOVE ACCUMULATED SEDIMENTS IF

CAPACITY HAS BEEN REDUCED BY FIFTY PERCENT AND AT

COMPLETION OF PROJECT.

2. ALL PROJECT VEHICLES SHALL BE SUPPLIED WITH A SPILL

KIT, INCLUDING SEVERAL SPILL BLOCKING MATS TO

PREVENT WATER FROM ENTERING AN INLET. THE SPILL

BLOCKING MATS SHALL BE DEPLOYED AT ALL INLETS

CONNECTED TO EITHER A SEDIMENTATION MANHOLE OR

DRY WELL. A VACTOR TRUCK SHALL BE USED TO REMOVE

ANY STORM WATER ACCUMULATING IN THE STREET

DURING DEPLOYMENT OF THE MATS.

3. ANY NEEDED DEWATERING ACTIVITIES SHALL ENSURE

STORM WATER IS CLEAN AND FREE OF SEDIMENT,

SURFACTANTS, AND OTHER POLLUTANTS. TURBIDITY

MONITORING OF STORM WATER REMOVED FROM TRENCH

SHALL ENSURE LEVELS ARE NON-VISIBLY TURBID, WHICH

WILL BE ACCOMPLISHED BY USING AN APPROPRIATE

SEDIMENT FILTRATION METHOD. IF THE CHOSEN METHOD

IS NOT MEETING TURBIDITY LEVEL, A DIFFERENT

FILTRATION METHOD SHALL BE SELECTED OR, IF NEEDED,

THE DEWATERING MAY BE DISCHARGED TO SANITARY

SEWER WITH PRIOR APPROVAL OBTAINED FROM THE CITY

OF ST. HELENS.

4. WET VACUUM TO BE USED DURING ASPHALT SAW CUTTING

TO PREVENT SLURRY DISCHARGE.

5. AREA DRAINS LOCATED BEHIND CURB AND SIDEWALK DO

NOT NEED PROTECTED.

AutoCAD SHX Text P

P

IRIR

EX STM MH

RIM: 88.77

IE IN: 83.38 (36"S)

IE OUT: 83.11 (36"N)

EX STM DI

TOP GRATE: 87.41

BOT. GRATE: 86.24

IE OUT: 85.83 (12" SW)

SUMP: 85.18

EX 36" CONC

CULVERT

IE: 84.88

EX 36" CONC

CULVERT

IE: 85.36

EX STM CB

RIM: 84.45

IE IN: 82.59 (10"NW)

IE OUT: 82.33 (10"SE)

SUMP: 80.92

EX STM MH

RIM: 84.77

IE IN: 81.47 (6"S)

IE IN: 80.24 (10"NW)

IE OUT: 80.07 (12"SE)

EX STM CB

RIM: 83.68

IE OUT: 81.74 (6"N)

SUMP: 79.69

EX STM CB

RIM: 84.60

IE OUT: 82.92 (10"SE)

SUMP: 82.42

SD

SDSD

83 85

150 PORT AVE

201 PORT AVE

200 PORT AVE

201 PORT AVE

EX STM MH

RIM: 88.68

IE IN: 86.09 (12"NE)

IE IN: 83.28 (36"N)

IE OUT: 82.81 (36"S)

7" DBH

WATER 4 CENTERLINE 3FT

WIDE (INTERMITTENT)

WETLAND C BOUNDARY

10" DBH

7" DBH

300 PORT AVE

R/W

R/W

R/WR/W

R/W

CO

M

SD

10"SS10"SS

CO

M

COM

COM

COM

COM

COM

COM

COM

2"POLY G

2"POLY G

G

G

15"CONC SS15"CONC SS15"CONC SS

36"CONC SD36"CONC SD

W

W

W

W

W

W W

W

SS

A19+00 A20+00 A21+00 A22+00

SS 27"PVC SS

IR

SS

EX STM CO

RIM: 90.57

IE BEND: 90±

EX STM CO

RIM: 91.27

IE BEND: 89±EX STM CO

RIM: 91.52

IE BEND: 89±

92 91

570 MILTON WAY105 PORT AVE

100 PORT AVE

100 PORT AVE

EXIST COMM

JUNCTION BOX

150 PORT AVE

R/W

R/W

R/W

R/WR/W

6"SS

R / W

COMCOMCOM

CO

M

G

G

2"STL G

2"POLY G

"S

S

15"CONC SS

15"CONC SS

W

W

W

WW

W

SS

A23+00 A24+00 A25+00

A26+00

SS

/ 27"PVC SS

27"PVC SS27"PVC SS

27"PVC SS

90% SUBMITTAL PRELIMINARY

NOT FOR

CONSTRUCTION

Drawing Path and Name: A:\_V-W\Projects\OR\st. helens\2023\w233257or.00\12 CADD\12-5 sheets\W233257OR_C-052.dwg, Plotted Date: July 3, 2025 4:51 PM By: Spencer Severance

1 2 3 4 5 6

A

B

C

D

Engineer's Seal:

This document, ideas, and designs incorporated herein, are an instrument of professional service, and is not to be used, in whole or in part, for any other project without the written authorization of CONSOR.

Sub Consultant: Client / Owner: Project Title:

Sheet:

0 11/2 IF BAR DOES NOT MEASURE 1"

DRAWING IS NOT TO SCALE

Designed By:

Drawn By:

Checked By:

Approved By:

Consor Project No.:

Issued On:

CITY OF ST. HELENS

WASTEWATER SYSTEM CAPACITY

IMPROVEMENTS BASINS 4 AND 6

PROJECT NO. S-679

W233257OR

MAY 2025

Consultant:

CIVIL

EROSION AND SEDIMENT

CONTROL PLAN

STA A18+20 TO STA A26+80

BTM

NEM

WSE

BVO

C-054

BASIN 6

PLAN

SCALE: 1"=20'

M A

TC

H

LI

N

E S

TA

2+

SE

E

BE

LO

W

M A

TC

H

LI

N

E S

TA

A

+2

SE

E

SH

EE

T

C-

PORT AVE

PLAN

SCALE: 1"=20'

M A

TC

H

LI

N

E S

TA

A

+8

SE

E

SH

EE

T

C-

PORT AVEM

A

TC

H

LI

N

E S

TA

2+

SE

E

AB

OV

E

BIO FILTER BAG, SEE DET, SHT C-072

WATTLE, SEE DET, SHT C-072

DRAINAGE FLOW DIRECTION

SEDIMENT FENCING, SEE DET, SHT C-072

EXISTING 1' CONTOURS

EXISTING 5' CONTOURS

LEGEND

FURNISH & INSTALL:

INLET PROTECTION PER

DETS ON SHT C-072, TYP

NOTES:

1. SEDIMENTATION MANHOLES: MONITOR SEDIMENTATION

MANHOLES AND REMOVE ACCUMULATED SEDIMENTS IF

CAPACITY HAS BEEN REDUCED BY FIFTY PERCENT AND AT

COMPLETION OF PROJECT.

2. ALL PROJECT VEHICLES SHALL BE SUPPLIED WITH A SPILL

KIT, INCLUDING SEVERAL SPILL BLOCKING MATS TO

PREVENT WATER FROM ENTERING AN INLET. THE SPILL

BLOCKING MATS SHALL BE DEPLOYED AT ALL INLETS

CONNECTED TO EITHER A SEDIMENTATION MANHOLE OR

DRY WELL. A VACTOR TRUCK SHALL BE USED TO REMOVE

ANY STORM WATER ACCUMULATING IN THE STREET

DURING DEPLOYMENT OF THE MATS.

3. ANY NEEDED DEWATERING ACTIVITIES SHALL ENSURE

STORM WATER IS CLEAN AND FREE OF SEDIMENT,

SURFACTANTS, AND OTHER POLLUTANTS. TURBIDITY

MONITORING OF STORM WATER REMOVED FROM TRENCH

SHALL ENSURE LEVELS ARE NON-VISIBLY TURBID, WHICH

WILL BE ACCOMPLISHED BY USING AN APPROPRIATE

SEDIMENT FILTRATION METHOD. IF THE CHOSEN METHOD

IS NOT MEETING TURBIDITY LEVEL, A DIFFERENT

FILTRATION METHOD SHALL BE SELECTED OR, IF NEEDED,

THE DEWATERING MAY BE DISCHARGED TO SANITARY

SEWER WITH PRIOR APPROVAL OBTAINED FROM THE CITY

OF ST. HELENS.

4. WET VACUUM TO BE USED DURING ASPHALT SAW

CUTTING TO PREVENT SLURRY DISCHARGE.

5. AREA DRAINS LOCATED BEHIND CURB AND SIDEWALK DO

NOT NEED PROTECTED.

IR

SS

EX STM AD

RIM: 95.58

IE IN: 93.61 (6"NW)

IE OUT: 93.53 (6"SE)

EX STM CB

RIM: 95.62

IE OUT: 92.71 (12"SE)

EX STM MH

RIM: 96.57

IE IN: 91.36 (12"NW)

IE IN: 91.31 (15"NE)

IE IN: 91.27 (12"SE)

IE OUT: 91.17 (15"SW)

EX STM CB

RIM: 95.70

IE OUT: 91.78 (12"NW)

SD

96 96

555 S COLUMBIA RIVER HWY

575 S COLUMBIA RIVER HWY

APPROX. LOCATION OF

AT&T LONG HAUL LINE

EXIST EDGE OF

GRAVEL LINE FOR RR EXIST COMM

(NOT SURVEYED)

FO

FO

APPROX. LOCATION OF

VERIZON LONG HAUL

DUAL LINES

R/ W

W

W

R /W

R/ W

"C

PP

S

D

12"SD12"SD

OV

HD

OVHD

OVHD

OVHD

FOFOFOFO

4"

PO

LY

G

2"STL G

2"STL G 8"

PV

C

SS

8"

PV

C

SS

FO

FO

FO

CO

M

CO

M

W

W

W

SSA27+00

A28+00 A29+00

A3 0+

SS

42"STL CASING 42"STL CASING

27"PVC SS

27"PVC SS

"H

DP

E

SS

SS

SS

UNKNOWN PIPE

EX STM CB

RIM: 93.95

IE OUT: 90.46 (12"SE)

EX STM CB

RIM: 94.03

IE IN: 89.90 (12"NE)

IE OUT: 89.85 (12"SE)

SUMP: 88.73

IE: 89.54IE IN: 90.67 (24"NW)

IE OUT: 89.16 (24"SE)

IE IN: 89.91 (12"NW)

IE OUT: 89.82 (12"SW)

SUMP: 89.93

EX STM AD

RIM: 93.92

IE IN: 92.27 (12"NE)

IE OUT: 92.19 (12"W)

EX STM CB

RIM: 94.97

IE IN: 92.06 (12"NW)

IE IN: 92.01 (10"SE)

IE OUT: 91.78 (12"NE)

EX STM MH

RIM: 95.20

IE IN: 92.23 (6"NW)

IE IN: 92.17 (12"SW)

IE OUT: 91.86 (12"SW)

EX STM CB

RIM: 94.37

IE OUT: 93.44 (6"SE)

SUMP: 94.37

EX STM MH

RIM: 96.02

IE IN: 90.98 (15"NE)

IE IN: 90.87 (12"SW)

IE IN: 90.86 (12"SE)

IE OUT: 90.81 (21"SE)

RIM: 94.48

IE IN: 90.46 (21"NW)

IE OUT: 90.26 (21"SE)

RIM: 95.02

IE OUT: 91.43 (12"NW)

SD

SD

SD

SD

585 S COLUMBIA RIVER HWY575 S COLUMBIA RIVER HWY

R/W

R/ W

R/W

8"PVC SS

R/W

12"SD

715 COLUMBIA RIVER HWY

"C

ON

C

SD

"C

ON

C

SD

"C

ON

C

SD

"C

ONC

SD

12"CONC SD

OV

HD

OV

HD

OVHDOVHDOVHD

OV

HD

OV

HD

OVHD OVHD

OV

HD

OVHD

OVHD

COMCOMCOMCOM

2"

ST

L G

4"POLY G4"POLY G

4"POLY G

E

E

E

E

EE

E E

15"CONC SS

8"PVC SS

8"PVC SS

8"PVC SS

8"SS

8"SS

"D

I W

10"W

W

10"W

WW

10"W

W

10"W10"W

W

"W

FO

A31+00 A32+00 A33+00

A3 4+

A3

5+

SS

SS SS

"H

DP

E

SS

" S

S

28"HDPE SS 28"HDPE SS

90% SUBMITTAL PRELIMINARY

NOT FOR

CONSTRUCTION

Drawing Path and Name: A:\_V-W\Projects\OR\st. helens\2023\w233257or.00\12 CADD\12-5 sheets\W233257OR_C-052.dwg, Plotted Date: July 3, 2025 5:18 PM By: Spencer Severance

1 2 3 4 5 6

A

B

C

D

Engineer's Seal:

This document, ideas, and designs incorporated herein, are an instrument of professional service, and is not to be used, in whole or in part, for any other project without the written authorization of CONSOR.

Sub Consultant: Client / Owner: Project Title:

Sheet:

0 11/2 IF BAR DOES NOT MEASURE 1"

DRAWING IS NOT TO SCALE

Designed By:

Drawn By:

Checked By:

Approved By:

Consor Project No.:

Issued On:

CITY OF ST. HELENS

WASTEWATER SYSTEM CAPACITY

IMPROVEMENTS BASINS 4 AND 6

PROJECT NO. S-679

W233257OR

MAY 2025

Consultant:

CIVIL

EROS…