Attachment B - ODF Molalla Stormwater Improvements - Drawings.pdf

PDF 26 MB Posted Jun 24, 2026

Attached to: Mollala Storm System Improvements Projects
Solicitation number: S-62900-00016916
Issued by: Oregon

About this file

Written by GovTribe AI · Jul 2, 2026

This is a technical drawings attachment related to stormwater infrastructure improvements for the City of Molalla, Oregon. The document provides detailed engineering plans and specifications for the Molalla Storm System Improvements Projects, which appear to involve the design and construction of stormwater management infrastructure to address drainage and water management needs within the city. The drawings likely include site plans, utility layouts, drainage patterns, and construction details necessary for contractors to understand project scope, dimensions, and technical requirements for bidding and execution purposes.

The attachment serves as a critical reference document for prospective bidders and contractors, establishing the physical parameters and engineering standards that must be met during project implementation. These technical drawings establish the baseline specifications for project delivery, allowing contractors to accurately assess project complexity, material requirements, and labor costs when preparing proposals for the stormwater improvement work.

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Other files

File	Type	Posted
ITB PO-62900-00016916 Molalla Stormwater Improvements - Final.pdf	PDF	Jun 24, 2026
Attachment A - ODF Molalla Stormwater Improvements - Specifications.pdf	PDF	Jun 24, 2026

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OREGON DEPARTMENT OF FORESTRY

Clackamas County, Oregon

VOLUME 3 - Project Drawings

FOR THE CONSTRUCTION OF

ODF STORM DRAIN IMPROVEMENTS

May 2026 Project No. 2413-002

Prepared By:

Civil West Engineering Services, Inc.

www.civilwest.com

Newport ● Coos Bay ● Eagle Point ● Albany

609 SW Hurbert St. ● Newport, OR 97365 Ph 541.264.7040 ● Fax 541.264.7041 http://www.civilwest.com/

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OREGON DEPARTMENT

OF FORESTRY

ODF STORM DRAIN IMPROVEMENTS

PROJECT NO. 2413-002

MAY 2026CLACKAMAS COUNTY, OR

LOCATION MAP

PORTLAND

SALEM

EUGENE

COOS BAY

LONGVIEW

THE DALLES

PENDLETON

BEND

BURNS

KLAMATH FALLSMEDFORDBROOKINGS

CRESCENT CITY

ROSEBURG

SEAL ROCK

SPRINGFIELD

CORVALLIS

ONTARIO

GRANTS PASS

OREGON

NEVADA

WASHINGTON

P A C

O C E A N

LA GRANDE

BURNS

JUNCTION

CALIFORNIA

ASHLAND

TILLAMOOK

SEASIDE

LINCOLN CITY

NEWPORT

MYRTLE POINT

FLORENCE

BANDON

PORT ORFORD

GOLD BEACH

EAGLE POINT

ADAIR VILLAGE

CONTACT INFORMATION

OREGON DEPARTMENT OF FORESTRY

CONTACT:

TITLE:

EMAIL:

PHONE:

OWNER

AMELIA STIREWALT

AMELIA.S.STIREWALT@ODF.OREGON.GOV

971-375-5595

CIVIL WEST ENGINEERING SERVICES, INC.

CONTACT:

TITLE:

EMAIL:

PHONE:

SURVEYOR

KYLE GOCHNOUR

PROFESSIONAL LAND SURVEYOR

KGOCHNOUR@CIVILWEST.NET

541-260-8601

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VICINITY MAP

SCALE: 1" = 1000'

NAVD88

PROJECT VERTICAL DATUM

OREGON STATE PLANE COORDINATE

SYSTEM, SOUTH ZONE NAD83, EPOCH 2010

BASIS OF PROJECT COORDINATES

MOLALLA COMMUNICATIONS

EMAIL:

PHONE:

COMMUNICATIONS

SUPPORT@ MOLALLA.COM

503-829-1100

NW NATURAL GAS

PHONE:

GAS

800-882-3377

PROJECT LOCATION

CIVIL WEST ENGINEERING SERVICES, INC.

CONTACT:

TITLE:

EMAIL:

PHONE:

ENGINEER

MATT WADLINGTON

CIVIL WEST PRINCIPAL

MWADLINGTON@CIVILWEST.NET

541-223-5130

PORTLAND GENERAL ELECTRIC

EMAIL:

PHONE:

POWER

SERVICE.COORDINATORS@PGN.COM

503--323-6700

PUBLIC WORKS DEPARTMENT

CONTACT:

TITLE:

EMAIL:

PHONE:

EMERGENCY PHONE:

CITY OF MOLALLA

ADAM SCHULTZ

PW MAINTENANCE SECTION MANAGER

ASHULTZ@CITY OF MOLALLA.COM

503-793-8402 503-793-9043

ASTOUND (WAVE BROADBAND)

EMAIL:

PHONE:

CABLE

info@astoundgroup.com 800-427-8686

14995 OR-211

MOLALLA, OR 97038

SITE ADDRESS

PROJECT LOCATION

AutoCAD SHX Text 99W

AutoCAD SHX Text

SHEET INDEX

SHEET NUMBER SHEET TITLE

C0 COVER SHEET

G1 GENERAL NOTES, LEGEND AND ABBREVIATIONS

G2 CITY STANDARD CONSTRUCTION NOTES

C1 C1 - EXISTING SITE PLAN

C2 DESIGN OVERVIEW

C3 SITE GRADING

C4 PLAN AND PROFILE

C5 PLAN AND PROFILE

C6 PLAN AND PROFILE

C7 PLAN AND PROFILE

C8 EROSION CONTROL PLAN

D1 DETAIL SHEET - TRENCH

D2 DETAIL SHEET - CATCH BASIN

D3 DETAIL SHEET - CATCH BASIN CONT.

D4 DETAIL SHEET - STORM DRAIN MANHOLE

D5 DETAIL SHEET - STORM DRAIN MANHOLE CONT.

D6 DETAIL SHEET - ROADWAY STRIPING

D7 DETAIL SHEET - DETENTION BASIN - PLANTING

DETAIL

D8 DETAIL SHEET - GRASS SWALE

D9 PLATE RESTRICTOR DETAIL

D10 CONSTRUCTION ENTRANCE DETAIL

D11 SILT FENCE DETAIL

D12 INLET PROTECTION DETAILS

D13 INLET PROTECTION DETAILS CONT.

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20JAMES R . PARMENTER

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D A

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A B

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N S

EXISTING FEATURE LEGEND ABBREVIATIONS

H Y

MBSANITARY SEWER MANHOLE

STORM DRAIN MANHOLE

CATCH BASIN

WATER VALVE

WATER METER

FIRE HYDRANT

CLEANOUT

TEE/CROSS FITTING

ELBOW FITTING

REDUCER FITTING

MECHANICAL JOINT ADAPTER

LINETYPE LEGEND

WATER LINE

STORM DRAIN

SANITARY SEWER

ELECTRICAL

OVER HEAD LINE

TELEPHONE LINE

GAS LINE

TREELINE

EDGE OF PAVEMENT

RIGHT OF WAY

MAJOR CONTOURS

MINOR CONTOURS

FENCELINE

MAIL BOX

AIR RELEASE VALVE

BLOW OFF VALVE

TREE/SHRUB

SIGN

SURVEY MARKER

POWER POLE

GUY ANCHOR

POWER PEDESTAL

TELEPHONE PEDESTAL

CONCRETE

PAVEMENT

NATURAL GROUND

WETLANDS

BUILDING

GRANULAR

MATERIALS, (CRUSHED

ROCK, GRAVEL, ETC.)

EXISTING GRADING LEGEND

HATCH LEGEND

GRADE

H Y

MBSANITARY SEWER MANHOLE

STORM DRAIN MANHOLE

CATCH BASIN

WATER VALVE

WATER METER

FIRE HYDRANT

CLEANOUT

TEE/CROSS FITTING

ELBOW FITTING

REDUCER FITTING

MECHANICAL JOINT ADAPTER

MAIL BOX

AIR RELEASE VALVE

BLOW OFF VALVE

TREE/SHRUB

SIGN

SURVEY MARKER

POWER POLE

GUY ANCHOR

POWER PEDESTAL

TELEPHONE PEDESTAL

LINETYPE LEGEND

WATER LINE

STORM DRAIN

SANITARY SEWER

ELECTRICAL

OVER HEAD LINE

TELEPHONE LINE

GAS LINE

TREELINE

EDGE OF PAVEMENT

RIGHT OF WAY

MAJOR CONTOURS

MINOR CONTOURS

FENCELINE

CONCRETE

PAVEMENT

NATURAL GROUND

WETLANDS

BUILDING

GRANULAR

MATERIALS, (CRUSHED

ROCK, GRAVEL, ETC.)

PROPOSED GRADING LEGEND

HATCH LEGEND

EXISTING GRADE

SPOT ELEVATION

SLOPE

(HOR:VER)

GRADE

310.45PROPOSED GRADE

SPOT ELEVATION

TOP

TOE

SLOPE

(HOR:VER)

2:1

A ________________________________

AC ASPHALTIC CONCRETE

AUX AUXILARY

B_________________________________

BC BEGINNING OF CURVE

BCR BEGINNING OF CURVE RETURN

BF BLIND FLANGE

BLDG BUILDING

BO BLOW OFF

BOW BACK OF WALK

C_________________________________

C:C CENTER TO CENTER

CF CUBIC FEET

CL CENTERLINE

CLR CLEARANCE

CMP CORRUGATED MEDAL PIPE

CNTL CONTROL

CONC CONCRETE

CONT CONTINUED

D_________________________________

DIA DIAMETER

DO DISSOLVED OXYGEN

D/S DOWN SPOUT

E_________________________________

E EAST

EFF EFFLUENT

EL ELEVATION

EOP EDGE OF PAVEMENT

F_________________________________

FG FINISHED GRADE

FH FIRE HYDRANT

FL FLOWLINE

FLG FLANGE

G_____________________________

GL GUTTER LINE

GPD GALLONS PER DAY

GPH GALLONS PER HOUR

GPM GALLONS PER MINUTE

H_________________________________

HB HOSE BIB

HOR HORIZONTAL

HP HORSEPOWER

HR HANDRAIL

I_________________________________

IE INVERT ELEVATION

INF INFLUENT

INV INVERT

L_________________________________

LAT LATERAL

M_________________________________

MAX MAXIMUM

MCC MOTOR CONTROL CENTER

MFRD MANUFACTURED

MGD MILLION GALLONS PER DAY

MJ MECHANICAL JOINT

N_________________________________

N NORTH

NEG NEGATIVE

NIC NOT IN CONTRACT

NTS NOT TO SCALE

O_________________________________

OC ON CENTER

P_________________________________

P PUMP

PE PLAIN END

PI POINT OF INTERSECTION

PL PROPERTY LINE

PP POWER POLE

PVC POLYVINYL CHLORIDE

PVT PAVEMENT

PW POTABLE WATER

Q_________________________________

Q FLOWRATE

R_________________________________

R RADIUS

RAD RADIAL BEARING

RED REDUCER

ROW RIGHT OF WAY

REQ REQUIRED

RT RIGHT

S _________________________________

S SOUTH

SCH SCHEDULE

SD STORM DRAIN

SDMH STORM DRAIN MAN HOLE

SL SLOPE

SPEC SPECIFICATION

SS STAINLESS STEEL

SSMH SANITARY SEWER MANHOLE

STA STATION

STD STANDARD

T _________________________________

TDH TOTAL DYNAMIC HEAD

TOB TOP OF BANK

TOC TOP OF CURB

TOW TOP OF WALL

TP TANGENT POINT

TSS TOTAL SUSPENDED SOLIDS

TYP TYPICAL

U_________________________________

UNO UNLESS NOTED OTHERWISE

UV ULTRAVIOLET

V_________________________________

V VOLT

VAR VARIABLE

VC VERTICAL CURVE

VCP VITRIFIED CLAY PIPE

W_________________________________

W WEST

WAT POTABLE WATER

W/O WITHOUT

WM WATER METER

WSE WATER SURFACE ELEVATION

WWF WELDED WIRE FABRIC,

WET WEATHER FLOW

SHEET NOTES:

1. CONTRACTOR SHALL CONTACT "ONE CALL" FOR UTILITY LOCATES PRIOR TO THE START OF

ANY EXCAVATION.

2. CONTRACTOR SHALL POTHOLE EXISTING UTILITIES PRIOR TO NEW STORM DRAIN

CONSTRUCTION TO CONFIRM EXISTING STORM DRAIN DEPTH LOCATION, AND FITTING

REQUIREMENTS FOR CONNECTION OF NEW STORM DRAIN TO EXISTING.

3. CONTRACT DOCUMENTS INCLUDE ALL PLAN SHEETS, AND ATTACHED TECHNICAL

SPECIFICATIONS.

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TOP

AutoCAD SHX Text

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AutoCAD SHX Text (2%)

AutoCAD SHX Text (2:1)

GENERAL NOTES:

1. ALL WORK AND MATERIALS SHALL CONFORM TO THE CURRENT EDITION OF THE OREGON STANDARD SPECIFICATIONS FOR CONSTRUCTION AS AMENDED BY THE CITY OF MOLALLA PUBLIC WORKS STANDARDS AND CONSTRUCTION REQUIREMENTS PER THE PUBLIC WORKS DIRECTOR. ALL WORK WITHIN THE PUBLIC RIGHT-OF�WAY OR PUBLIC EASEMENTS REQUIRES A PUBLIC

WORKS PERMIT.

2. THE CONTRACTOR IS RESPONSIBLE FOR THE PROCUREMENT OF ALL APPLICABLE PERMITS, LICENSES AND CERTIFICATES RELATIVE TO THE TRADES TO COMPLETE THE PROJECT AND FOR THE USE OF SUCH WORK WHEN COMPLETED. COMPLIANCE SHALL BE AT ALL LEVELS, FEDERAL, STATE, COUNTY, AND LOCAL, RELATING TO THE PERFORMANCE OF WORK.

3. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY ALL UTILITY LOCATIONS PRIOR TO CONSTRUCTION AND ARRANGE FOR THE RELOCATION OF ANY IN CONFLICT WITH THE PROPOSED CONSTRUCTION. THE LOCATIONS, DEPTH, AND DESCRIPTION OF EXISTING UTILITIES SHOWN WERE COMPILED FROM AVAILABLE RECORDS AND-OR FIELD SURVEYS. THE ENGINEER OR UTILITY COMPANIES DO NOT GUARANTEE THE ACCURACY OF THE COMPLETENESS OF SUCH RECORDS. ADDITIONAL

UTILITIES MAY EXIST WITHIN THE WORK AREA.

4. OREGON LAW REQUIRES THE CONTRACTOR TO FOLLOW RULES ADOPTED BY THE OREGON UTILITY NOTIFICATION CENTER. THOSE RULES ARE SET FORTH IN OAR 052-001-0010 THROUGH OAR 952-001-0000. THE CONTRACTOR MAY OBTAIN COPIES OF THE RULES FROM THE CENTER BY CALLING TOLL FREE TO (877)668-4001 OR BY ACCESSING THE INTERNET AT WWW.CALLBEFOREYOUDIG.ORG. THE CONTRACTOR MUST NOTIFY THE CENTER AT LEAST TWO (2) BUSINESS DAYS, BUT NOT MORE THAN TEN (10) BUSINESS DAYS, BEFORE COMMENCING AN EXCAVATION. CALL TOLL FREE TO (800)332-2344.

5. THE CONTRACTOR SHALL MAKE PROVISIONS TO KEEP ALL EXISTING UTILITIES (INCLUDING NON-LOCATABLE) IN SERVICE AND PROTECT THEM DURING CONSTRUCTION. CONTRACTOR SHALL BE RESPONSIBLE FOR THE IMMEDIATE NOTIFICATION OF DAMAGE TO UTILITIES AND THE REPAIR OR REPLACEMENT OF DAMAGED UTILITIES USING MATERIALS AND METHODS APPROVED BY THE UTILITY OWNER. NO SERVICE INTERRUPTIONS SHALL BE PERMITTED WITHOUT PRIOR WRITTEN AGREEMENT WITH THE UTILITY

OWNER/PROVIDER.

6. THE CONTRACTOR SHALL NOTIFY PROJECT ENGINEER AND CITY OF MOLALLA PUBLIC WORKS INSPECTOR FORTY�EIGHT (48) HOURS IN ADVANCE OF STARTING CONSTRUCTION AND TWENTY-FOUR (24) HOURS BEFORE RESUMING WORK AFTER SHUT DOWNS, EXCEPT FOR NORMAL RESUMPTION OF WORK FOLLOWING SATURDAYS, SUNDAYS OR HOLIDAYS.

7. THE CONTRACTOR SHALL REMOVE AND DISPOSE OF ALL TREES, STUMPS, ROOTS, TOPSOIL, AND OTHER MATERIAL AND WHERE INDICATED ON THE PLANS. MATERIALS SHALL BE DISPOSED OF IN SUCH A MANNER AS TO MEET ALL APPLICABLE REGULATIONS.

NO BURNING IS ALLOWED WITHIN CITY LIMITS.

8. ALL CONSTRUCTION VEHICLES SHALL PARK ON THE CONSTRUCTION SITE OR AT A LOCATION(S) INDICATED ON THE APPROVED PLAN. HOURS OF CONSTRUCTION FOR PUBLIC IMPROVEMENTS SHALL BE 7:00 AM TO 8:00 PM, MONDAY THROUGH FRIDAY. NO WORK ON PUBLIC IMPROVEMENTS IS ALLOWED ON SATURDAY, SUNDAYS OR GOVERNMENT HOLIDAYS. CONSTRUCTION ACTIVITIES INCLUDE ALL FIELD MAINTENANCE OF EQUIPMENT, REFUELING, AND PICK-UP OR DELIVERY OF EQUIPMENT AS WELL AS

THE ACTUAL CONSTRUCTION ACTIVITY.

9. THE CONTRACTOR SHALL KEEP AN APPROVED SET OF PLANS ON THE PROJECT SITE AT ALL TIMES.

10. THE CONTRACTOR SHALL PERFORM ALL WORK NECESSARY TO COMPLETE THIS PROJECT IN ACCORDANCE WITH THE PLANS AND

SPECIFICATIONS INCLUDING SUCH INCIDENTALS AS MAY BE NECESSARY TO MEET THE INTENT OF THE PROJECT CONTRACT

DOCUMENTS AND APPLICABLE AGENCY REQUIREMENTS.

11. THE CONTRACTOR SHALL MAINTAIN AND COORDINATE ACCESS SATISFACTORY WITH THE NEEDS OF EMERGENCY SERVICE

AGENCIES AND ALL AFFECTED PROPERTIES.

12. IF GROUND WATER SPRINGS OR TILED DRAINAGE SYSTEMS ARE ENCOUNTERED DURING CONSTRUCTION, THE CONTRACTOR SHALL IMMEDIATELY CONTACT THE PROJECT ENGINEER. THE PROJECT ENGINEER SHALL DIRECT THE CONTRACTOR TO TAKE MEASURES TO ENSURE THAT THE WATER IS NOT CONVEYED THROUGH UTILITY TRENCHES AND THE NATURAL FLOW PATH OF THE SPRING IS ALTERED AS LITTLE AS PRACTICABLE. THE PROJECT ENGINEER SHALL SUBMIT A REPORT SUMMARIZING THE FINDINGS

TO THE CITY. IMPACTS AND MITIGATION SHALL BE ADDRESSED FOR CITY APPROVAL.

13. THE CONTRACTOR SHALL POTHOLE AND VERIFY LOCATION AND DEPTH OF ALL EXISTING UTILITIES PRIOR TO THE START OF CONSTRUCTION. THE CONTRACTOR SHALL TAKE ALL NECESSARY FIELD MEASUREMENTS AND OTHERWISE VERIFY ALL DIMENSIONS AND EXISTING CONSTRUCTION CONDITIONS INDICATED AND OR SHOWN ON THE PLANS. SHOULD ANY ERROR OR INCONSISTENCY EXIST, THE CONTRACTOR SHALL NOT PROCEED WITH THE WORK AFFECTED UNTIL REPORTED TO THE PROJECT

ENGINEER FOR CLARIFICATION OR CORRECTION.

14. ANY INSPECTION BY THE CITY, COUNTY, STATE, FEDERAL AGENCY, OR PROJECT ENGINEER SHALL NOT, IN ANY WAY RELIEVE THE CONTRACTOR FROM ANY OBLIGATION TO PERFORM THE WORK IN COMPLIANCE WITH THE APPLICABLE CODES AND

REGULATIONS, CITY STANDARDS, AND PROJECT DOCUMENTS.

15. THE CONTRACTOR SHALL VERIFY CENTERLINE AND TOP OF CURB ELEVATIONS PRIOR TO CONSTRUCTION TO INSURE COMPLIANCE WITH THE CONSTRUCTION DRAWINGS AND REPORT ANY DISCREPANCIES IMMEDIATELY TO THE PROJECT ENGINEER.

16. THE CONTRACTOR SHALL SUBMIT A TRAFFIC CONTROL PLAN FOR APPROVAL PRIOR TO THE START OF THE CONSTRUCTION IN ACCORDANCE WITH THE SPECIFICATIONS, CITY STANDARDS, AND THE CURRENT EDITION OF THE MANUAL OF UNIFORM TRAFFIC

CONTROL DEVICES. ALL FLAGGERS SHALL BE CERTIFIED BY THE STATE OF OREGON.

17. THE CONTRACTOR SHALL PROVIDE THE CITY AND PROJECT ENGINEER A TWENTY-FOUR (24) HOUR CONTACT PERSON AND

NUMBER.

18. THE CONTRACTOR SHALL VERIFY TEMPORARY CONSTRUCTION EASEMENTS PRIOR TO CONSTRUCTION.

19. THE CONTRACTOR SHALL RECORD ALL CHANGES TO THE CONSTRUCTION PLANS. CHANGES SHALL INCLUDE REFERENCE

MEASUREMENTS, MATERIALS TYPE, AND UTILITIES NOT PREVIOUSLY SHOWN ON THE PLANS. INFORMATION SHALL BE SUBMITTED

TO THE PROJECT ENGINEER FOR THE COMPLETION OF RECORD DRAWINGS.

20. ALL SURVEY MONUMENTS ON THE PROJECT’S SITE OR THAT MAY BE SUBJECT TO DISTURBANCE WITHIN THE CONSTRUCTION AREA, OR THE CONSTRUCTION OF ANY OFF-SITE IMPROVEMENTS SHALL BE ADEQUATELY REFERENCED AND PROTECTED PRIOR TO COMMENCEMENT OF ANY CONSTRUCTION ACTIVITY. IF THE SURVEY MONUMENTS ARE DISTURBED, MOVED, RELOCATED, OR DESTROYED AS A RESULT OF ANY CONSTRUCTION, THE CONTRACTOR SHALL, AT THEIR COST, RETAIN THE SERVICES OF A REGISTERED PROFESSIONAL LAND SURVEYOR IN THE STATE OF OREGON TO RESTORE THE MONUMENT TO ITS ORIGINAL CONDITION AND FILE THE NECESSARY SURVEYS AS REQUIRED BY OREGON STATE LAW. A COPY OF ANY RECORDED SURVEY SHALL BE SUBMITTED TO THE CITY PUBLIC WORKS DIRECTOR OR AUTHORIZED REPRESENTATIVE.

21. THE CONTRACTOR IS REQUIRED TO METER CONSTRUCTION WATER THROUGH A CITY BULK WATER METER. CONTACT MOLALLA

UTILITY BILLING AT 503-829-6855 TO SET UP AN ACCOUNT.

22. ANY ROOTS ENCOUNTERED OVER 2 INCHES SHALL BE CUT WITH SAW PERPENDICULAR TO TRENCH.

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20JAMES R . PARMENTER

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STREET NOTES:

1. THE CONTRACTOR SHALL SUBMIT A TRAFFIC CONTROL PLAN FOR APPROVAL PRIOR TO THE START OF CONSTRUCTION IN ACCORDANCE WITH THE SPECIFICATIONS, CITY STANDARDS, AND THE CURRENT EDITION OF THE MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES. APPROVAL OF PLAN REQUIRED PRIOR TO ANY WORK PERFORMED IN EXISTING PUBLIC RIGHT-OF-WAY. ALL

FLAGGERS SHALL BE CERTIFIED BY THE STATE OF OREGON.

2. CONTRACTOR TO PROVIDE STATE CERTIFIED INDEPENDENT TESTING AGENCY FOR ALL TESTING OF SUB-GRADE, BASE ROCK, CONCRETE CURB AND DRIVEWAY, ASPHALT PAVEMENT, AND CONCRETE PAVEMENT. CITY RESERVES THE RIGHT TO DIRECT TESTING AGENCY ON FREQUENCY OF TESTING. TESTING AGENCY SHALL SUBMIT ONE COPY OF ALL TESTING REPORTS TO CITY’S

AUTHORIZED REPRESENTATIVE.

3. NO FILLS ARE TO BE PLACED PRIOR TO CITY APPROVAL OF STRIPING. SUB-GRADE SHALL BE COMPACTED TO 95% OF THE MAXIMUM DRY DENSITY. AS DETERMINED BY AASHTO T-180. ALONG WITH TESTING USING A NUCLEAR DENSITY GAUGE, A PROOF-ROLL SHALL BE CONDUCTED BY THE CONTRACTOR AND ACCEPTED BY CITY. PRIOR TO PLACEMENT OF BASE ROCK. ALL SOFT AREAS SHALL BE OVER-EXCAVATED TO A DEPTH SATISFACTORY TO THE GEOTECHNICAL ENGINEER AND CITY REPRESENTATIVE, BACKFILLED WITH CRUSHED ¾”-0 AND COMPACTED TO 95% OF THE MAXIMUM DRY DENSITY, AS DETERMINED

BY AASHTO T-180.

4. BASE ROCK SHALL BE FROM AN APPROVED SOURCE. CITY MUST RECEIVE AND APPROVE A COPY OF STATE MIX DESIGN AT LEAST SEVEN (7) DAYS PRIOR TO THE PLACEMENT OF BASE ROCK. BASE ROCK SHALL CONFORM TO THE RECENT EDITION OF THE OREGON STANDARD SPECIFICATIONS FOR CONSTRUCTION AS AMENDED BY THE CITY OF MOLALLA PUBLIC WORKS STANDARDS.

5. BASE ROCK SHALL BE COMPACTED TO 95% OF THE MAXIMUM DRY DENSITY. AS DETERMINED BY AASHTO T-180. ALONG WITH TESTING USING A NUCLEAR DENSITY GAUGE, A PROOF ROLL SHALL BE CONDUCTED BY THE CONTRACTOR AND ACCEPTED BY THE

CITY PRIOR TO PAVING.

6. NO PAVING SHALL TAKE PLACE UNTIL ALL TESTING OF UNDERGROUND UTILITIES (INCLUDING TONE TESTING BY CITY), SUB-GRADE, AND BASE ROCK IS COMPLETED AND APPROVED BY THE CITY.

7. ASPHALT PAVEMENT SHALL BE FROM AN APPROVED SOURCE. CITY MUST RECEIVE AND APPROVE A COPY OF A STATE MIX DESIGN AT LEAST SEVEN (7) DAYS PRIOR TO THE PLACEMENT OF PAVEMENT. PAVEMENT SHALL CONFORM TO THE RECENT EDITION OF THE OREGON STANDARD SPECIFICATIONS FOR CONSTRUCTION AS AMENDED BY THE CITY OF MOLALLA PUBLIC WORKS

STANDARDS AND CONSTRUCTION REQUIREMENTS PER THE PUBLIC WORKS DIRECTOR.

8. ASPHALT PAVEMENT SHALL BE COMPACTED TO A MINIMUM OF 92% OF RELATIVE DENSITY BASED ON RICE GRAVITY.

9. UTILITY CUTS ACROSS EXISTING STREETS SHALL BE T-CUT, CONFORMING TO CITY DETAIL.

10. ALL CONSTRUCTION STAKING OF PUBLIC STREETS SHALL BE PERFORMED BY OR UNDER THE DIRECTION OF A PROFESSIONAL

LAND SURVEYOR REGISTERED IN THE STATE OF OREGON. STAKES SHALL, AT A MINIMUM, LOCATE ALL HORIZONTAL POINTS OF CURVATURE (BEGINNING, MIDPOINT, AND ENDING), VERTICAL POINTS OF CURVATURE (BEGINNING, LOW/HIGH POINT, AND ENDING), CURB RETURNS (BEGINNING, MIDPOINT, AND ENDING), AND CENTERLINE FOR OFFSET CROWNS. MAXIMUM SPACING FOR REFERENCE STAKES IS FIFTY (50) FEET. CONSTRUCTION SHALL NOT BE ALLOWED BEFORE STAKING IS PERFORMED.

11. NEWLY CONSTRUCTED CURBS SHALL BE STAMPED WITH THE CAPITAL LETTER “D” FOR STORM, “S” FOR SANITARY, AND “W” FOR WATER AT THE LOCATION OF EACH UNDERGROUND SERVICE CROSSING. LETTERS SHALL BE THREE (3) INCHES IN HEIGHT AND EMBOSSED A MINIMUM OF ONE-QUARTER (1/4) INCH DEEP. ALL WEEP HOLES SHALL BE INSTALLED DURING INITIAL CURB AND GUTTER POUR. INSTALLATION OF WEEP HOLES AFTER INITIAL POUR SHALL BE CORE DRILLED ONLY. USE OF SAW CUT AND KNOCK

OUT BY HAMMER IS PROHIBITED.

12. ALL DRIVEWAY APRONS AND CURB AND GUTTER SHALL HAVE CYLINDER SAMPLES TAKEN BY A STATE CERTIFIED INDEPENDENT TESTING AGENCY. REPORT OF A BREAK RESULT SHALL BE PROVIDED TO THE CITY’S AUTHORIZED REPRESENTATIVE.

13. ALL STREET SIGNAGE, STRIPING, AND REFLECTORS SHALL BE INSTALLED BY APPLICANT/CONTRACTOR PRIOR TO PROJECT CORRECTION LIST WALK-THROUGH. ALL CROSSWALK STRIPING AND ROADWAY EMBLEMS SHALL BE THERMOPLASTIC. ALL SIGNAGE AND STRIPING SHALL COMPLY WITH CITY STANDARDS, AND THE CURRENT EDITION OF THE MANUAL ON UNIFORM

TRAFFIC CONTROL DEVICES.

14. SEE NOTES FOR STREET LIGHTING, DRY UTILITIES, STREET TREES, LANDSCAPING, AND IRRIGATION.

STORM NOTES:

1. ALL STORM MANHOLE LIDS SHALL BE SIXTEEN (16) HOLE TYPE. MANHOLES IN PLANTER AREAS SHALL BE A MINIMUM OF SIX (6)

INCHES ABOVE FINISHED GRADE.

2. ALL CONNECTIONS TO EXISTING MANHOLES SHALL BE CORE DRILLED. USE OF CUT-OFF SAW AND KNOCK OUT BY HAMMER IS PROHIBITED. REVISIONS TO DESIGN WILL NOT CONSTITUTE A VARIANCE TO CORE DRILL REQUIREMENT AND MAY, AT CITY DISCRETION, REQUIRE MANUFACTURE AND INSTALLATION OF NEW MANHOLE MATCHING DESIGN REVISION.

3. STORM LATERALS SHALL BE A MINIMUM OF SIX (6) INCHES DIAMETER AND HAVE LOCATING WIRE (SOLID 12-GAUGE WHITE INSULATION) INSTALLED BESIDE THE PIPE AND PLASTIC CAUTION TAPE INSTALLED 1-FOOT ABOVE THE PIPE CROWN. SURFACE LOCATING WIRE AT RIGHT-OF-WAY CLEANOUTS; TAPE SHALL BE TIED OFF TO THE 2X4 MARKER PAINTED WHITE. TONE TESTING BY

CITY TO PASS PRIOR TO PAVING.

4. NEWLY CONSTRUCTED CURBS OR REPLACED CURBS SHALL BE STAMPED WITH THE CAPITOL LETTER “D” AT THE LOCATION OF EACH UNDERGROUND STORM LATERAL CROSSING. LETTERS SHALL BE THREE (3) INCHES IN HEIGHT AND EMBOSSED A MINIMUM

OF ONE-QUARTER (1/4) INCH DEEP.

5. ALL WEEP HOLES SHALL BE INSTALLED DURING INITIAL CURB AND GUTTER POUR. INSTALLATION OF WEEP HOLES AFTER INITIAL POUR SHALL BE CORE DRILLED ONLY. USE OF SAW CUT AND KNOCK OUT BY HAMMER IS PROHIBITED.

6. ALL STORM LINES SHALL BE FLUSHED AND CLEANED PRIOR TO TESTING. ALL STORM LINES SHALL BE VIDEO INSPECTED. IN ADDITION, STORM LINES CONSTRUCTED OF FLEXIBLE PIPE SHALL BE MANDREL TESTED AT FIVE�PERCENT (5%). CONTRACTOR TO FURNISH ALL NECESSARY TEST EQUIPMENT AND PERFORM THE TESTS IN A MANNER SATISFACTORY TO THE CITY. CITY

INSPECTOR SHALL BE PRESENT DURING TESTING (24-HOUR NOTIFICATION REQUIRED).

7. STORM WATER FACILITIES SHALL NOT BE ACTIVATED AND/OR CONNECTED TO PUBLIC STORM SYSTEMS OR WATERWAYS UNLESS

FACILITY HAS BEEN TESTED AND APPROVED BY CITY STAFF.

8. CONTRACTOR TO PROVIDE INDEPENDENT TESTING AGENCY FOR ALL TESTING OF TRENCH BACKFILL. TESTING OF BACKFILL LIFTS SHALL NOT EXCEED THREE (3) FEET IN DEPTH AND TESTS OF LIFTS SHALL BE STAGGERED ALONG TRENCH LINE. CITY RESERVES THE RIGHT TO DIRECT TESTING AGENCY ON FREQUENCY OF TESTING. TESTING AGENCY SHALL SUBMIT ONE (1) COPY OF ALL

TESTING REPORTS TO CITY’S AUTHORIZED REPRESENTATIVE.

9. ALL CONSTRUCTION TAKING OF PUBLIC STORM LINES SHALL BE PERFORMED BY OR UNDER THE DIRECTION OF A PROFESSIONAL LAND SURVEYOR REGISTERED IN THE STATE OF OREGON. STAKES SHALL, AT A MINIMUM, LOCATE ALL TEES, CLEANOUTS, MANHOLES, CATCH BASINS, DITCH INLETS, AND OUTFALLS. MAXIMUM SPACING FOR REFERENCE STAKES IS FIFTY (50) FEET.

CONSTRUCTION SHALL NOT BE ALLOWED BEFORE STAKING IS PERFORMED.

STREET TREES, LANDSCAPING, AND IRRIGATION:

1. ALL STREET TREES AND LANDSCAPING SHALL NOT CONFLICT WITH SIGHT DISTANCE REQUIREMENTS. STREET TREES SHALL

MAINTAIN THE FOLLOWING CLEARANCE DISTANCES:

1.1. MINIMUM OF FIVE (5) FEET FROM ALL SANITARY, STORM, AND WATER SERVICE CROSSINGS

1.2. MINIMUM OF TEN (10) FEET OF CLEARANCE FROM ALL FIRE HYDRANTS

1.3. MINIMUM OF TWENTY (20) FEET OF CLEARANCE FROM ALL CATCH BASINS/GUTTER INLETS AND STREET LIGHTS

1.4. MINIMUM OF FORTY (40) FEET OF CLEARANCE FROM NEAR CURB LINE OF INTERSECTING STREET

2. ALL LANDSCAPE PLANTINGS SHALL MAINTAIN THREE (3) FEET OF CLEARANCE FROM FIRE HYDRANTS AS MEASURED FROM

CENTER NUT TO EDGE OF MATURE GROWTH.

3. ALL IRRIGATION SYSTEMS SHALL HAVE BACKFLOW PROTECTION AS REQUIRED BY PLUMBING CODE AND THE CITY OF MOLALLA

CITY OF MOLALLA STANDARD CONSTRUCTION NOTES

424.33 EL

427.90 EL

422.50 EL

SD SD

SD SD SD

T T

G G

T T

SSSS

899 E MAIN ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 01900

899 E MAIN ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 01900

724 PATRO

L ST.

M O

LALLA, O

R 97038

TAXLO

T: 52E09D 00508

722 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00506

809 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB05800

920 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DA00300

813 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB05700

835 E M

AIN ST.

M O

LALLA, O

R 97038

TAXLO

T: 52E09D 01801

920 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DA00300

PLAN SCALE

25 5050

1"=50'

0 100 ww w.

civ ilw es t.c om

0 F

, O R

GRID BEARING - OCRS PORTLAND ZONE

HORIZONTAL DATUM (BASIS OF BEARINGS)

PATROL STREET

HIGHWAY 211

ODF BUILDING

PAVED AREA

GRAVELPARKING LOT

GRASS AREA

GRAVEL ROADWAY

EXISTING SITE PLAN ODF

EXT'G CATCH BASIN.

REMOVE AND REPLACEGRAVEL AREA

EXT'G SANITARY

SEWER MANHOLE

EXT'G FENCELINE

EXT'G CURB

:\2

O re go n D ep ar tm en t o f F or es try \2

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- M ol al la S to rm

D ra in D es ig n\

D es ig n

Se rv ic es

\D W

G \B as em ap .d w g

SHEET

B Y:

DATE:

G D

O N

A N

EG I N

76466PE

OREGON

0JAMES R . PARMENTER

EXPIRATION DATE: 12/31/26

REG

I STERED PROFESS IONAL

5/22/2026

-0

NAVD88

VERTICAL DATUM

EXT'G CATCH BASIN

REMOVE AND REPLACE

EXT'G STORM BOX

STRUCTURE.

PROTECT IN PLACE

6" PVC. PAVED AREA DRAIN

OUTLET. REMOVE EXT'G PIPE.

EXT'G ROOF DRAIN

ROOF AND BASEMENT

DRAIN TO DAYLIGHT

REMOVE EXT'G

STRUCTURE

EXT'G CATCH

BASIN OUTLET PIPE

EXT'G UNDERDRAIN PVC

PIPE. REMOVE EXT'G PIPE

EXT'G UNDERDRAIN PVC

PIPE. REMOVE EXT'G PIPE

ROOF DRAIN OUTLET REROUTE

PIPE TO DISCHARGE INTO NEW

SWALE. REMOVE ABANDONED PIPE

EXT'G AREA DRAIN

FOR PAVED AREA

EXT'G SHOE

CLEANER BASIN

EXT'G POWER POLES.

PROTECT IN PLACE

EXT'G PALLETTES

AND CLEANING AREA

REMOVE EXT'G STUMPS

REMOVE

EXT'G STUMP

REMOVE

EXT'G STUMP

EXISTING

WATER METER

O D

O R

M D

R A

LINE TABLE

LINE #1

L 1

L 2

L 3

L 4

L 5

L 6

L 7

L 8

L 9

L 10

DIRECTION

S17°48'41"W

S71°50'55"E

S10°58'29"W

S09°57'16"E

S15°55'40"W

S12°53'33"W

S70°27'44"E

S79°53'44"E

S69°10'07"E

S89°21'52"E

LENGTH

17.06'

518.41'

129.41'

30.95'

75.49'

23.43'

312.51'

50.02'

130.55'

166.79'

899 E MAIN ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 01900

722 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00506

720 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00504

720 PATROL ST. UNIT A

MOLALLA, OR 97038

TAXLOT: 52E09D 00510

718 PATROL ST,

MOLALLA, OR 97038

TAXLOT: 52E09D 00507

716 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00500

714 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00503

712 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00509712 PATRO

L ST. UNIT B

M O

LALLA, O

R 97038

TAXLO

T: 52E09D 00501

715 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06700

717 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06600

719 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06500

721 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06400

723 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06300

727 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06100

801 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06000

805 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB05900

809 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB05800

920 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DA00300

813 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB05700

710 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00502

713 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB02500

835 E M

AIN ST.

M O

LALLA, O

R 97038

TAXLO

T: 52E09D 01801

725 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06200

920 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DA00300

MH3

MH1

MH2

MH4

" P

18" PVC

15" PVC

12" PVC

8" P

8" PVC

8" P

8" PVC

AD1

DI1

AD2

AD3

AD4

ES1

AD5

AD7

AD6

:\2

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O D

- M ol al la S to rm

D ra in D es ig n\

D es ig n

Se rv ic es

\D W

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SHEET

B Y:

DATE:

EG I N

76466PE

OREGON

0JAMES R . PARMENTER

EXPIRATION DATE: 12/31/26

REG

ISTERED PROFESS IONAL

, O

5/22/2026

-0

PLAN STA. TO----

C2 1 ----

PLAN SCALE

0100 50 100 200

1"=100' ww w.

civ ilw es t.c om

0 F

, O R

SHEET C2 SHEET C3

SHEET C3

SHEET C4

EXT'G ODF SITE - RUNOFF FROM SITE TO BE

CONVEYED TO CITY STORM DRAIN SYSTEM

REPLACE EXT'G

CATCH BASIN

REPLACE EXT'G CATCH BASIN

WITH NEW CATCH BASIN

NEW DETENTION BASIN

NEW STORM DRAIN MANHOLE

NEW STORM

DRAIN MANHOLE

CONNECT TO EXT'G

STORM DRAIN MANHOLE

PATROL STREET

HIGHWAY 211

NEW GRASS SWALE

SHEET C4 SHEET C5

NEW STORM DRAIN

DISCHARGE POINT

NEW CATCH BASIN

O D

O R

M D

R A

DISCHARGE EXT'G

STRUCTURE INTO SWALE

DISCHARGE ROOF

DRAIN INTO NEW SWALE

NEW GRASS SWALE

PLAN VIEW DESIGN OVERVIEW

PLACE NEW CATCH BASIN OVER EXT'G STORM DRAIN LINE.

REROUTE STORM DRAIN CONVEYANCE TO NEW CATCH BASIN

AutoCAD SHX Text D

SD SD SD SD SD SD

69'

16'8'

6+00

14'

408.5 408.5

408.5

413.0

413.0 413.0

413.0

415.9

415.8

413.0

410.0

411.0

410.0

410.0 410.0

411.0 410.0

411.0

410.0

411.5

6+00

7+00

724 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00508

42'

13'-6" 410.0 414.3

410.0 414.4

SD SD SD

PI STA: 7+94.8

411.5

418.9 413.2

413.2

414.7

420.4

GB STA: 8+86.0

9+00 10+009+00 10+00

417.9

418.6

899 E MAIN ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 01900

835 E M

AIN ST.

M O

LALLA, O

R 97038

TAXLO

T: 52E09D 01801

GB STA: 10+38.0

418.9

420.4

SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD SD

SD SD

PI STA: 11+07.3

PI STA: 11+57.3

421.6

423.5

427.3

11+0011+00 427.2

427.3

899 E MAIN ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 01900

SHEET NOTES:

1. GRADES AROUND STRUCTURES THAT ARE TO BE

REMOVED AND REPLACED SHALL BE MAINTAINED

2. FIELD VERIFY SWALE ALIGNMENT AND ASSOCIATED

PIPING TO AVOID EXT'G TREES OR STRUCTURES.

2 GRASS SWALE AND DETENTION BASIN GRADING

PLAN SCALE

1"=20'

020 20 40 ww w.

civ ilw es t.c om

0 F

, O R

O D

O R

M D

R A

SLOPE

3:1

8'2'

8' 2'

:\2

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O D

- M ol al la S to rm

D ra in D es ig n\

D es ig n

Se rv ic es

\D W

G \B as em ap .d w g

SHEET

B Y:

DATE:

EG I N

76466PE

OREGON

0JAMES R . PARMENTER

EXPIRATION DATE: 12/31/26

REG

ISTERED PROFESS IONAL

G R

A D

, O

5/22/2026

-0

SLOPE

3:1

WET POND FOREBAY

1 DETENTION WET POND BASIN GRADING

SEDIMENT TRAP BERM

SEE DETAIL 2 SHEET D9

SEDIMENT TRAP BERM

SEE DETAIL 2 SHEET D9

W W

W W W W

TTT

T T T T T T T T T T T T T T T T T

TT T T

TTTTTTTTTTTTTTT

T T T

WWWWWWWWWWWWWWWWWWWW

SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS

SDSDSDSDSDSDSDSDSDSDSDSDSDSD

1+00

2+00 3+00

MH1

BP: 0+00.00

PI: 0+17.06

1+00 2+00

3+00

720 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00504

720 PATROL ST. UNIT A

MOLALLA, OR 97038

TAXLOT: 52E09D 00510

718 PATROL ST,

MOLALLA, OR 97038

TAXLOT: 52E09D 00507716 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00500

714 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00503

712 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00509

712 PATRO

L ST. UNIT B

M O

LALLA, O

R 97038

TAXLO

T: 52E09D 00501

715 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06700

717 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06600

719 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06500

721 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06400

723 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09DB06300

MOLALLA, OR 97038

TAXLOT: 52E09DB06200

MH2

18" PVC L=398' S=0.84%

0+00 1+00 2+00 3+00 4+00

EXT'G MH

STA 0+00.00, 0.0 T

RIM: 407.20

18" IE IN (S): 402.28

8" IE IN (SE): 404.33

48" IE OUT (N): 402.08

MH1

STA 0+17.03, 0.0 T

RIM: 405.75

18" IE IN (E): 402.57

18" IE OUT (N): 402.37

C SV

18" PVC L=17' S=0.50%

18" PVC L=398' S=0.84%

CONSTRUCTION NOTES:

NEW STORM DRAIN MANHOLE. SEE

FLAT-TOP MANHOLE DETAIL FOR DESIGN

INFORMATION

NEW 18" PVC STORM DRAIN PIPE. SEE

DETAIL FOR TRENCH INFORMATION

CONNECT NEW 18" PIPE TO EXT'G

MANHOLE. MANHOLE ELEVATION --

M A

54+

PLAN STA. TO0+00

C4 1 4+00

M A

54+

PLAN SCALE

20 4040

1"=40'

0 80

PROFILE STA. TO

SCALE HORIZ:

VERT:

1" = 40' 1" = 4'

4+002 C4

0+00

:\2

O re go n D ep ar tm en t o f F or es try \2

O D

- M ol al la S to rm

D ra in D es ig n\

D es ig n

Se rv ic es

\D W

G \B as em ap .d w g

SHEET

B Y:

DATE:

EG I N

76466PE

OREGON

0JAMES R . PARMENTER

EXPIRATION DATE: 12/31/26

REG

ISTERED PROFESS IONAL

N A

N D

P R

, O

5/22/2026

-0

4+ ww w.

civ ilw es t.c om

0 F

, O R

APPROXIMATE EXT'G GROUND

CLASS "B" BACKFILL

O D

O R

M D

R A

CONNECTION TO EXT'G MANHOLE

TO BE MADE BY CORE DRILL ONLY

WEHRE VERTICAL CLERANCE IS NOT POSSIBLE,

SEWER LATERAL SHALL BE EXPOSED FOR A DISTANCE

OF 10 FEET ON EACH SIDE OF THE CROSSING, AND

SHALL BE REPLACED WITH C900. LENGTH OF PIPE

SHALL BE CENTERED AT THE CROSSING.

AutoCAD SHX Text D

AutoCAD SHX Text D1

AutoCAD SHX Text

AutoCAD SHX Text D4

DI1

MH4

SS SS

MH3

6+00

AD1

PI: 5+35.47

PI: 6+64.87

PI: 6+95.83

PI: 7+71.32

PI: 7+94.75

6+00

7+00

" P

S =0

.8 4%

12" PVC L=23' S=0.50%

18" PVC L=129' S=0.50%

15" PVC L=8' S=4.18%

724 PATROL ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 00508

2 P

MOLA

A, O

OT:

E0 9D

0 P

MOLA

A, O

OT:

E0 9D

3 P

MOLA

A, O

OT:

E0 9D

7 P

MOLA

A, O

OT:

E0 9D

MOLA

A, O

OT:

E0 9D

5 P

MOLA

A, O

OT:

E0 9D

MH2

4+00 5+00 6+00 7+00 8+00

DI1

STA 7+94.67, 1.0 RT

RIM: 411.63

12" IE OUT (N): 410.10

MH3

STA 5+35.47, 0.0 T

RIM: 415.21

18" IE IN (S): 407.13

18" IE OUT (W): 406.93

12" PVC L=23' S=0.50%

18" PVC L=129' S=0.50%

MH4

STA 6+64.87, 0.0 T

RIM: 412.25

15" IE IN (E): 407.98

18" IE OUT (N): 407.78

15" ORIFICE PLATE ON INLET PIPE

C SV

C SS

AD1

STA: 6+67.40

SD ALIGNMENT

RIM: 410.50

15" IE OUT (W): 408.31

MH2

STA 4+14.94, 0.0 LT

RIM: 412.41

18" IE IN (E): 405.92

18" IE OUT (W): 405.92

18" PVC L=121' S=0.84%

MATCH LINE STA.

SEE SHEETC6 8+00

MATCH LINE STA.

SEE SHEET

4+00

PLAN STA. TO4+00

C5 1 8+00

M A

T 4+

M A

68+

PLAN SCALE

20 4040

1"=40'

0 80

PROFILE STA. TO

SCALE HORIZ:

VERT:

1" = 40' 1" = 4'

8+002 C5

4+00 ww w.

civ ilw es t.c om

0 F

, O R

CONSTRUCTION NOTES:

NEW STORM DRAIN MANHOLE. SEE

DETAIL FOR MANHOLE INFORMATION

TYP. NEW 18" PVC STORM DRAIN PIPE.

SEE DETAIL FOR TRENCH INFORMATION

NEW DETENTION WET POND. SEE DETAIL

FOR DESIGN INFORMATION. SEE SHEET

C3 FOR GRADING INFORMATION.

NEW DITCH INLET SEE DETAIL FOR CATCH

BASIN INFORMATION

SEDIMENTTRAP BERM. SEE DETAIL FOR

DESIGN INFORMATION

DETENTION BASIN OUTLET STRUCTURE

WITH ORIFICE PLATE. SEE DETAIL FOR

STRUCTURE INFORMATION. ALSO SEE

DETAIL 3 ON THIS SHEET FOR OUTFALL

STRUCTURE PROFILE

DISCHARGE DRAIN PIPE INTO GRASS

SWALE THROUGH BUBBLER --

NEW GRASS SWALE FOREBAY, SEE

DETAIL FOR GRASS SWALE INFORMATION

APPROXIMATE EXT'G GROUND

CLASS "B" BACKFILL

CLASS "C" BACKFILL

O D

O R

M D

R A

AD1, BIORETENTION BASIN

OUTLET STRUCTURE. RIM

ELEVATION 410.5

MH3: SHALLOW MANHOLE. FLOW CONTROL

STRUCTURE. BEEHIVE GRATE RIM COVER.

RIM/OVERFLOW ELEVATION: 412.25

15" ORIFICE PLATE. SEE

DETAIL 1 SHEET D9

18" STORM DRAIN OUTLET.

INVERT ELEVATION 408.13

BIORETENTION BASIN TOP OF

BANK ELEVATION 413.0 BIORETENTION BASIN

BOTTOM ELEVATION: 408.5FINISHED GROUND

:\2

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O D

- M ol al la S to rm

D ra in D es ig n\

D es ig n

Se rv ic es

\D W

G \B as em ap .d w g

SHEET

B Y:

DATE:

EG I N

76466PE

OREGON

0JAMES R . PARMENTER

EXPIRATION DATE: 12/31/26

REG

ISTERED PROFESS IONAL

N A

N D

P R

, O

5/22/2026

-0

NOT TO SCALEC5

3 OUTFALL STRUCTURES PROFILE

AutoCAD SHX Text S

AutoCAD SHX Text D

AutoCAD SHX Text D4

AutoCAD SHX Text

AutoCAD SHX Text D1

AutoCAD SHX Text

AutoCAD SHX Text D7

AutoCAD SHX Text

AutoCAD SHX Text D9

AutoCAD SHX Text

AutoCAD SHX Text D4

AutoCAD SHX Text

AutoCAD SHX Text D2

AutoCAD SHX Text

AutoCAD SHX Text D9

AutoCAD SHX Text

AutoCAD SHX Text D8

SD SD SD SD SD SD SD SD SD SD

AD3

AD2

SDSDSDSDSDSDSDSDSDSD

GGGGG

GGGG

TTTTT

OH9+00 10+00

11+00

AD1

AD4

9+00 10+00

11+00

8" P

=1 .1

8" PVC L=74' S=3.60%

8" PVC L=45' S=0.50%

8" PVC L=26' S=2.50%

8" PVC L=8' S=2.46%

899 E MAIN ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 01900

8+00 9+00 10+00 11+00 12+00

AD3

STA 11+30.71, 47.6 LT

RIM: 425.54

8" IE IN (E): 421.30

8" IE OUT (S): 421.20

AD4

STA 11+91.25, 69.1 LT

RIM: 427.97

4" IE IN (SW): 424.28

8" IE OUT (W): 423.97

8" PVC L=45' S=0.50%

8" PVC L=74' S

=3.60%

8" PVC L=82' S=1.10%

AD2

STA 10+51.27, 79.6 LT

RIM: 422.50

8" IE OUT (SW): 418.37

M A

T 8+

PLAN STA. TO8+00

C6 1 12+00

M A

T 8+

M A

PLAN SCALE

20 4040

1"=40'

0 80

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CONSTRUCTION NOTES:

NEW STORM DRAIN BUBBLER

OUTLET. --

NEW STORM DRAIN PIPE. SEE

DETAIL FOR TRENCH INFORMATION

NEW GRASS SWALE, SEE DETAIL

FOR GRASS SWALE INFORMATION

REPLACE EXT'G AREA

DRAIN.CONNECT ALL EXT'G PIPES

TO NEW CATCH BASIN STRUCTURE.

SEE DETAIL FOR CATCH BASIN

INFORMATION

CONVEY EXT'G ROOF DRAIN TO

NEW AD4 --

EXT'G POWER POLES. PROTECT IN

PLACE. GRASS SWALE ALIGNED TO

AVOID POWER POLES

CONVEY EXT'G ROOF DRAIN TO

NEW SWALE --

CLASS "C" BACKFILL

APPROXIMATE EXT'G GROUND

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ES2

ES1

GGGG

TTTTT

TTTT

AD6

RIM: 432.37

8" IE OUT (SW): 429.68

EP: 12+87.83

PI: 11+57.27

AD4

AD5

AD7

RIM: 431.59

8" IE IN (NE): 428.90

8" IE OUT (SW): 428.90

8" PVC L=74' S=3.60%

8" PVC L=26' S=2.50%

8" PVC L=8' S=2.46%

=1 .5

899 E MAIN ST.

MOLALLA, OR 97038

TAXLOT: 52E09D 01900

12+00 12+88

AD5

STA: 12+80.22

SD ALIGNMENT

RIM: 429.86

8" IE IN (NE): 427.95

8" IE OUT (W): 427.95

ES1

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SD ALIGNMENT

RIM: 429.32

6" IE IN (N): 427.50

4" IE IN (E): 427.50

8" IE OUT (SW): 427.50

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STA: 12+61.38

SD ALIGNMENT

RIM: 429.51

6" IE OUT (S): 428.00

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APPROXIMATE

EXT'G GROUND

CONSTRUCTION NOTES:

NEW GRASS SWALE, SEE DETAIL FOR GRASS

SWALE INFORMATION

EXT'G STORM DRAIN STRUCTURE. PROTECT IN

PLACE. REMOVE 6" PVC OUTLET REPLACE WITH 8"

PIPE OUTLET TO DAYLIGHT AT NEW GRASS SWALE.

REMOVE AND REPLACE AREA DRAIN. PIPE OUTLET

TO DAYLIGHT AT NEW GRASS SWALE.

GAS UTILITY IN CLOSE PROXIMITY TO GRASS

SWALE. PROTECT GAS LINE IN PLACE. RELOCATION

MAY BE REQUIRED IF GAS LINE BURY DEPTH

CONFLICTS WITH SWALE CONSTRUCTION.

DAYLIGHT DISCHARGE PIPES INTO GRASS SWALE.

PIPE INVERT TO MATCH BOTTOM SWALE ELEVATION

CLASS "C" BACKFILL

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LINE TABLE

DIRECTION

S17°48'41"W

S71°50'55"E

S10°58'29"W

LENGTH

17.06'

518.41'

129.41'

EL. 413EL. 412.5

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PATROL STREET

HIGHWAY 211

ODF BUILDING

PAVED AREA

GRAVELPARKING LOT

GRASS AREA

GRAVEL ROADWAY

EROSION CONTROL PLAN

GRAVEL AREA

EXT'G STORM

SEWER MANHOLE

EXT'G FENCELINE

EXT'G CURB

CONSTRUCTION NOTES:

INLET PROTECTION. SEE SHEET D12 AND D13 --

INSTALL SILT FENCE AROUND PROJECT AREA. SEE

SHEET D11 FOR DESIGN DETAILS --

CONSTRUCT A CONSTRUCTION ENTRANCE. SEE

SHEET D10 FOR DESIGN DETAILS --

CONSTRUCT WHEEL WASH AREA. SEE SHEET D14

FOR DESIGN DETAILS --

EROSION AND SEDIMENT CONTROL NOTES:

1. THE CONTRACTOR SHALL PROVIDE EFFECTIVE EROSION CONTROL PROTECTION TO INCLUDE, BUT NOT LIMITED TO, GRADING, DITCHING, HAY BALES, SILT FENCING, AND SEDIMENT

BARRIERS TO MINIMIZE EROSION AND IMPACT TO ADJACENT PROPERTY.

2. APPROVAL OF THE EROSION AND SEDIMENT CONTROL PLAN DOES NOT CONSTITUTE AN APPROVAL OF PERMANENT ROAD OR DRAINAGE DESIGN (E.G. SIZE AND LOCATION OF ROADS, PIPES, STRUCTURES, CHANNELS, DETENTION FACILITIES, UTILITIES, ETC.)

3. THE EROSION AND SEDIMENT CONTROL MEASURES MUST BE CONSTRUCTED IN CONJUNCTION WITH ALL CLEARING AND GRADING ACTIVITIES, AND IN SUCH A MANNER AS TO INSURE THAT SEDIMENT AND SEDIMENT LADEN WATER DOES NOT ENTER THE STORM DRAINAGE SYSTEM, STREETS, OR VIOLATE APPLICABLE WATER STANDARDS.

4. THE CONTRACTOR SHALL CALL FOR INITIAL AND FINAL EROSION AND SEDIMENT CONTROL INSPECTION. EROSION AND SEDIMENT CONTROL INSPECTION SHALL BE APPROVED PRIOR TO THE START OF CONSTRUCTION ACTIVITIES. CONTRACTOR SHALL REMOVE TRASH AND SEDIMENT DEPOSITS PRIOR TO FINAL PROJECT INSPECTION.

5. THE EROSION AND SEDIMENT CONTROL MEASURES SHALL BE INSPECTED AND MAINTAINED DAILY BY THE APPLICANT/CONTRACTOR. INACTIVE SITES SHALL BE INSPECTED AND

MAINTAINED A MINIMUM OF ONCE A MONTH OR WITHIN 24 HOURS FOLLOWING A STORM EVENT.

6. GRAVEL CONSTRUCTION ENTRANCES SHALL BE INSTALLED AT THE BEGINNING OF CONSTRUCTION AND MAINTAINED FOR THE DURATION OF THE PROJECT. ADDITIONAL MEASURES, SUCH AS A WHEEL WASH, MAY BE REQUIRED TO INSURE THAT ALL PAVED AREAS ARE KEPT CLEAN FOR THE DURATION OF THE PROJECT. WHEEL WASH BASINS SHALL BE PERIODICALLY (OR AS DIRECTED BY CITY INSPECTORS) DRAINED, CLEANED OF SEDIMENT, AND REFILLED WITH CLEAN WATER. AT NO TIME SHALL VEHICLES EXIT THE SITE WITHOUT USING WHEEL

WASH STATION, INCLUDING DURING MAINTENANCE OF WHEEL WASH BASIN.

7. STORM DRAIN INLETS, BASINS, AND AREA DRAINS SHALL BE PROTECTED UNTIL THE COMPLETION OF THE PROJECT. SILT SACK INSERTS WITH BIO-BAGS ALONG CURB INLETS AND CATCH BASINS IS THE PREFERRED MEASURE FOR INLET PROTECTION WHERE APPLICABLE. CONTRACTOR SHALL PROVIDE AND MAINTAIN SILT SACK PROTECTION AT THE NEAREST CATCH BASIN INLET(S) DOWNSTREAM OF THE PROJECTS SITE. INSTALL INLET PROTECTION TO NEW INLETS AS INSTALLED.

8. AT NO TIME SHALL SEDIMENT BE ALLOWED TO ACCUMULATE WITHIN A TRAPPED CATCH BASIN. ALL SILT SACKS SHALL BE INSPECTED DAILY AND CLEANED OR REPLACED AS NECESSARY. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO PAVING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT LADEN WATER INTO THE

DOWNSTREAM STORM SYSTEM.

9. THE CONTRACTOR SHALL INSTALL, OPERATE AND MAINTAIN ADEQUATE EROSION CONTROL MEASURES IN CONFORMANCE WITH THE STANDARDS ADOPTED BY THE CITY OF MOLALLA DURING THE CONSTRUCTION OF ANY PUBLIC UTILITIES AND BUILDINGS IMPROVEMENTS UNTIL SUCH TIME AS APPROVED PERMANENT VEGETATIVE MATERIALS HAVE BEEN INSTALLED.

10. AT THE COMPLETION OF CONSTRUCTION, ALL EXPOSED SOILS MUST BE HYDROSEEDED AND/OR COVERED WITH STRAW AND TACIFIER. IF GROUND COVER IS NOT ESTABLISHED BY OCTOBER 15, THE OPEN AREAS SHALL BE PROTECTED THROUGH THE WINTER WITH MULCH, EROSION BLANKETS, OR OTHER METHOD(S) APPROVED BY THE CITY. SEEDING SHALL BE

PERFORMED NO LATER THAN SEPTEMBER 31 FOR EACH PHASE OF CONSTRUCTION.

11. STOCKPILES OF SOIL OR OTHER EROSION PRONE MATERIALS FOR EXTENDED PERIODS MUST BE COVERED WITH TEMPORARY EROSION CONTROL MEASURES AND PROTECTED WITH

SILT FENCING.

12. DURING ALL PHASES OF WORK THE CONTRACTOR SHALL TAKE PRECAUTIONS TO ABATE ANY DUST NUISANCE. DUST SHALL BE MINIMIZED TO THE EXTENT PRACTICABLE AND

PREVENTION MEASURES SHALL BE CONTINUOUS UNTIL FINAL INSPECTION BY THE CITY.

13. NO PERSON SHALL CREATE PHYSICAL EROSION BY DRAGGING, DROPPING, TRACKING, OR OTHERWISE PLACING OR DEPOSITING, OR PERMITTING TO BE DEPOSITED, MUD, DIRT, ROCK, OR OTHER DEBRIS ON A PUBLIC STREET, OR INTO ANY PART OF THE PUBLIC STORM WATER SYSTEM AND SURFACE WATER SYSTEM, OR INTO ANY PART OF A PRIVATE STORM WATER OR SURFACE WATER SYSTEM THAT DRAINS OR CONNECTS TO THE PUBLIC STORM WATER AND SURFACE WATER SYSTEM. ANY SUCH DEPOSITED MATERIAL SHALL BE IMMEDIATELY REMOVED BY HAND LABOR OR MECHANICAL MEANS. NO MATERIAL SHALL BE WASHED OR FLUSHED INTO ANY PART OF THE STORM WATER OR SURFACE WATER SYSTEM UNTIL ALL MECHANICAL MEANS TO REMOVE THE DEBRIS ARE EXHAUSTED AND PREVENTATIVE SEDIMENT FILTRATION IS IN PLACE.

14. ALL SEDIMENT FENCE SHALL BE INSTALLED PER MANUFACTURERS RECOMMENDATIONS AND COMPLY WITH THE RECENT EDITION OF THE OREGON STANDARD SPECIFICATIONS FOR CONSTRUCTION AS AMENDED BY THE CITY OF MOLALLA PUBLIC WORKS STANDARDS AND CONSTRUCTION REQUIREMENTS PER THE PUBLIC WORKS DIRECTOR.

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SHEET NOTES:

1. SEE SHEET C3 FOR BASIN GRADING, AND SHEET C5 FOR

INFRASTRUCTURE DESIGN INFORMATION

2. 8.4 SEED MIXES TEXT TAKEN FROM MOLALLA DESIGN

STANDARDS. USE THESE SEED MIXES ON ALL GRASS SWALE AND

DETENTION BASIN AREAS.

3. LANDSCAPE PLAN MUST FOLLOW ALLL REQUIREMENTS

SPECIFIED WITHIIN THE MOLALLA DESIGN STANDARDS

4. PLANT STANDARDS SHALL COMPLY WITH THE FOLLOWING

MINIMUM ACCEPTABLE DESIGN STANDARD:

4.1. EVERGREEN TREES: 3 PER 1000 SQUARE FEET, MINIMUM

HEIGHT 6 FEET.

4.2. DECIDUOUS TREES: 2 PER 1000 SQUARE FEET, MINIMUM

CALIPER 1 TO 1 1

2 INCH AT 2 FEET ABOVE BASE.

4.3. SHRUBS: 30 PER 1000 SQUARE FEET, MINIMUM CONTAINER 1

GALLON OR EQUIVALENT.

4.4. WETLAND PLANTS: 1 PER 2 SQUARE FEET OF POND

EMERGENT PLANT ZONE.

PLANTING LEGEND:

BIDENS CERNUS - SPACED 1-2' OC EVERGREEN TREE - SPACED 8-10' OC

CONRUS SERICEA - SPACED 3-4' OC

ROSA NUTKANA - SPACED 5-8' OC

PLAN SCALE

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1"=8'

DETENTION BASIN PLANTING DETAIL1

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SEDIMENT TRAP BERM

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WET POND FOREBAY

SEDIMENT TRAP BERM

SEE DETAIL 2 SHEET D9

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MIN-1'

CONTRACTOR IS TO PROVIDE

MAINTENANCE ACCESS TO BMPS AS

SPECIFIED IN THE CITY'S STORMWATER

MAINTENANCE AGREEMENT

2. USE 2 34" GAP-GRADED RIVER AGGREGATE

PLACED 2 12" TO 3 INCHES DEEP ON JUTE

MATTING PLACED OVER 6 INCHES OF

TOPSOIL. EXTEND RIVER AGGREGATE, JUTE,

AND TOPSOIL TO TOP OF TREATMENT AREA.

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