Plan_Sets.pdf

CITY OF ROSENBERG, TEXAS

DESIGN DRAWN DATE SHEET

REVISIONS

REV NO. DATE DESCRIPTION

CITY BID NO.: 2027-02BSD&C PID:

FILE NUMBER

SEPT.

WWTP NO. 1A CLARIFIER NO. 1

REHABILITATION PROJECT

12141 WICKCHESTER LANE SUITE 200

HOUSTON, TX 77079

(713) 491-8333

TEXAS REGISTRATION NUMBER: F-5713

CONSTRUCTION PLANS FOR

WWTP NO. 1A CLARIFIER NO. 1 REHABILITATION PROJECT

ROSENBERG, TEXAS

ISSUE FOR BIDDING DELIVERABLE

CITY BID NO. 2027-02B

LOCATION MAP

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N.T.S.

VICINITY MAP

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ARM ARM 01

Sheet List Table

01 01-G001 COVER SHEET

02 01-G002 GENERAL & CIVIL NOTES

TEXAS

CITY OF

ROSENBERG

GARVER PROJECT NO. 2501540

01-G001

COVER SHEET

WILLIAM BENTON MAYOR

JOYCE VASUT CITY MANAGER

COUNCIL MEMBERS

RICHARD OLSON AT LARGE POSITION 1

AMANDA BARTA AT LARGE POSITION 2

FELIX VARGAS JR. DISTRICT 1, MAYOR PRO TEM

STEVEN DeGREGORIO DISTRICT 2

SCOTT PETERSON DISTRICT 3

GEORGE ZEPEDA DISTRICT 4

CITY OF ROSENBERG BID NO. 2027-02B

SEPTEMBER 2026

PROJECT LOCATION

WWTP NO. 1A

2700 AVENUE A

ROSENBERG, TX 77471

SITE & STAGING PLAN03 01-G003

CLARIFIER DEMOLITION04 10-X101

CLARIFIER PROCESS PLAN VIEW05 10-P101

CLARIFIER PROCESS SECTION VIEW06 10-P301

CITY OF ROSENBERG

APPROVED BY:

CHARLES A. KALKOMEY, P.E. DATE

CITY ENGINEER

RIGO CALZONCIN DATE

ASSISTANT CITY MANAGER

THESE SIGNATURES ARE VOID IF CONSTRUCTION HAS NOT

COMMENCED IN ONE (1) YEAR FROM DATE OF APPROVALS.

DETAILS07 99-P101

ALEC R. MACMANUS

154827 L I C E N S E D

PR O F E S S I O N A L E NG I N

EER

S T A T E O F T E X A S

DIGITALLY

SEALED:

9/1/2026

GENERAL CIVIL NOTES

1. SAFETY SHALL BE THE SOLE RESPONSIBILITY OF THE CONTRACTOR. THE

CITY AND ENGINEER SHALL NOT BE RESPONSIBLE FOR SAFETY, MEANS, OR

METHODS OF THE CONTRACTOR.

2. THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING ALL

APPROPRIATE AGENCIES BEFORE WORK COMMENCES TO VERIFY THE TYPE,

LOCATION, PROTECTION REQUIREMENTS, DEPTH OF ALL EXISTING UTILITIES,

DRAINAGE FACILITIES, AND OTHER OBSTRUCTIONS. CONTRACTOR SHALL BE

RESPONSIBLE FOR ALL COSTS ASSOCIATED WITH REPAIRING AND/OR

REPLACING ANY SUCH ITEMS DAMAGED DURING CONSTRUCTION.

3. THIS IS AN OPERATIONAL WASTEWATER TREATMENT PLANT. OPERATIONS

MUST BE MAINTAINED. THE INDIVIDUAL CLARIFIER BASIN CONTAINING THE

SCOPE OF WORK IS CURRENTLY OUT OF SERVICE.

4. APPROXIMATE LOCATIONS OF OVERHEAD POWER LINES MAY OR MAY NOT BE

SHOWN ON PLANS. CONTRACTOR SHALL BE SOLELY RESPONSIBLE FOR

VERIFYING ALL LOCATIONS IN THE FIELD AND PLAN WORK IN THESE AREAS

ACCORDINGLY.

5. CONTRACTOR IS RESPONSIBLE FOR ALL DEWATERING ACTIVITIES AND

ASSOCIATED PERMITS REQUIRED FOR ALL EXCAVATIONS REQUIRED TO

COMPLETE THE PROJECT. THE CITY WILL DEWATER THE CLARIFIER BASIN AT

THE START OF THE PROJECT.

6. CONTRACTOR SHALL BE RESPONSIBLE FOR SITE DRAINAGE AND

COMPLIANCE WITH ALL GOVERNMENTAL STORM WATER REGULATIONS AND

PERMITS (SWPPP) AS REQUIRED. CONTRACTOR SHALL OBTAIN NOTICE OF

INTENT FROM APPROPRIATE STATE BODY PRIOR TO ANY CONSTRUCTION.

CONTRACTOR SHALL BE RESPONSIBLE FOR ANY PERMITS REQUIRED FOR

WORK WITHIN STREAMS.

7. ALL EXCAVATION BACKFILL SHALL BE COMPACTED TO MIN 95% STANDARD

PROCTOR DENSITY TO PREVENT SETTLEMENT.

8. ANY DISTURBED AREAS NOT SPECIFICALLY DESIGNATED TO BE GRADED

SHALL BE RESTORED TO EQUAL OR BETTER CONDITION AND SHALL BE

GRADED TO DRAIN AS APPROVED BY THE ENGINEER.

ABBREV DESCRIPTION

ABDN ABANDON

ALUM ALUMINUM SULFATE

APPROX APPROXIMATE

ASPH ASPHALT

ASSY ASSEMBLY

BLDG BUILDING

BLK BLOCK

BM BENCHMARK

B, BOT BOTTOM

CI CAST IRON

CIP CAST IRON PIPE

CJ CONSTRUCTION JOINT

CONC CONCRETE

CONN CONNECTION

CP CONTROL POINT

DI DUCTILE IRON

DIP DUCTILE IRON PIPE

EFF EFFLUENT

EQ

STATION

EX EXISTING

EXP EXPANSION

FCJ FLOOR CONSTRUCTION

FES FLARED END SECTION

FH FIRE HYDRANT

FG, FIN GR FINISH GRADE

FL FLOWLINE

FRP FIBERGLASS REINFORCED PIPE

FTG FOOTING

GL GAS LINE

GR GRADE

GV GATE VALVE

HWY HIGHWAY

IN INCHES

INF INFLUENT

INV INVERT

JT JOINT

LEN LENGTH

LG LONG

LIN LINEAL, LINEAR

LOC LOCATION

LT LEFT

MANUF MANUFACTURER

MGD MILLION GALLONS PER DAY

MISC MISCELLANEOUS

MJ MECHANICAL JOINT

N NORTH

NO,# NUMBER

NWSL NORMAL WATER SURFACE LEVEL

EOP END/EDGE OF PAVEMENT

BC BACK OF CURB

G GUTTER

FLG FLANGED

NE NORTHEAST

NW NORTHWEST

MH MANHOLE

ABOVE FINISHED FLOORAFF

CL CENTERLINE, CLASS

CMU CONCRETE MASONRY UNIT

CONT CONTINUOUS

DIA DIAMETER

EA EACH

ELEVATIONEL, ELEV

ELEC ELECTRICAL

FFE FINISHED FLOOR ELEVATION

FT FEET, FOOT

HORIZ HORIZONTAL

ID INSIDE DIAMETER

LF LINEAR FEET

MAX MAXIMUM

MIN MINIMUM

NIC NOT IN CONTRACT

NTS NOT TO SCALE

OC ON CENTER

PE PLAIN END

PI POINT OF INTERSECTION

PL, PLS PLATE, PLACES

PO PUSH ON

PP POWER POLE

R, RAD RADIUS

RCP REINFORCED CONCRETE PIPE

RED REDUCER

RJ RESTRAINED JOINT

ROW, R/W RIGHT-OF-WAY

RS RESILIENT SEAT

RT RIGHT

S SOUTH, SLUDGE

SCH SCHEDULE

SECT SECTION

SPEC SPECIFICATIONS

TBM TEMPORARY BENCHMARK

TEMP TEMPORARY, TEMPERED

THK THICKNESS

TC TIME CLOCK, TOP OF CURB

VT VENTILATOR

W/O WITHOUT

WTM WATER TRANSMISSION MAIN

WWF WELDED WIRE FABRIC

X BY

SW SIDEWALK, SOUTHWEST

PC POINT OF CURVE

PRC POINT OF REVERSE CURVE

PT POINT OF TANGENT, POINT

SE SOUTHEAST

RP RADIUS POINT

SDMH STORM DRAIN MANHOLE

SD STORM DRAIN

OD OUTSIDE DIAMETER

PD PROCESS DRAIN

PSI POUNDS PER SQUARE INCH

REINF REINFORCEMENT

REQD REQUIRED

SF SQUARE FEET, SILT FENCE

SHT SHEET

SQ SQUARE

SS SANITARY SEWER

STA STATION

STD STANDARD

T&B TOP AND BOTTOM

TYP TYPICAL

UNO UNLESS NOTED OTHERWISE

V VOLT, VALVE

VERT VERTICAL

W WIDTH, WATER

WL WATER LINE

W/ WITH

WS WATERSTOP

PVC POLYVINYL CHLORIDE

TS TOP OF SIDEWALK

OVF OVERFLOW

C CONDUIT

PROP PROPOSED

ESMT EASEMENT

TW TOP OF WALL

BOP BEGINNING OF PAVEMENT

VPI VERTICAL POINT OF INTERSECTION

PVI POINT OF VERTICAL INTERSECTION

NG NATURAL GAS

EVCS END OF VERTICAL CURVE

BVCS

VC VERTICAL CURVE

EW EACH WAY

SPC STANDARD PROCTOR DENSITY

HMA HOT MIX ASPHALT

DA DRAINAGE AREA

AC ACRE

PDMH PROCESS DRAIN MANHOLE

CSL

SL SAMPLE LINE

CPB CHEMICAL PULL BOX

HDWL HEADWALL

SSMH SANITARY SEWER MANHOLE

EPB ELECTRICAL PULLBOX

SSL SANITARY SEWER SERVICE LINE

WSL WATER SERVICE LINE

BEGINNING OF VERTICAL

CURVE STATION

CHEMICAL SAMPLE LINE,

CHLORINE SOLUTION

ABBREV DESCRIPTION

EC EDGE OF CONCRETE

EG EDGE OF GRAVEL

SURV LOC SURVEY LOCATED

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GENERAL MECHANICAL NOTES:

1. REFER TO SPECIFICATIONS AND PROJECT MANUAL FOR

ADDITIONAL INFORMATION AND REQUIREMENTS.

2. REFER TO ALL PROJECT DRAWINGS FOR DETAILS OF

CONSTRUCTION AND INSTALLATION REQUIREMENTS.

3. REFER TO GENERAL CONDITIONS AND SUPPLEMENTARY

GENERAL CONDITIONS FOR THE CONTRACT. THE GENERAL

CONTRACTOR IS RESPONSIBLE FOR FULL COORDINATION OF

PROJECT INCLUDING THE EQUIPMENT AND INSTALLATION OF

THE MECHANICAL WORK.

4. CONTRACTOR SHALL BECOME, PRIOR TO BID, THOROUGHLY

FAMILIAR WITH THE REQUIREMENTS OF THESE NOTES AS

WELL AS OTHER REQUIREMENTS SHOWN ON THE CONTRACT

DOCUMENTS.

5. ALL DRAWINGS ARE DIAGRAMMATIC AND INDICATE THE

GENERAL ARRANGEMENTS OR GEOMETRICAL RELATIONSHIPS

OF EQUIPMENT AND SERVICES. THEY ARE NOT INTENDED TO

SPECIFY OR SHOW EVERY OFFSET, SEQUENCE, DEVICE,

OPTION, FITTING, OR COMPONENT.

ABBREV DESCRIPTION

EQUAL

JOINT

CIVIL ABBREVIATIONS

ABBREV DESCRIPTION

6. INFORMATION AND COMPONENTS SHOWN ON RISER

DIAGRAMS OR DETAILS, BUT NOT SHOWN ON PLANS, AND

VICE VERSA, SHALL BE PROVIDED AS IF EXPRESSLY

REQUIRED BY BOTH.

7. CONTRACTOR SHALL NOT SCALE DRAWINGS. DRAWINGS

SPECIFIC TO THIS DISCIPLINE DO NOT LIMIT THE

RESPONSIBILITY OF WORK REQUIRED BY THE CONTRACT

DOCUMENTS.

8. UNLESS NOTED OTHERWISE, THE INDICATION AND/OR

DESCRIPTION OF ANY ITEM, IN THE DRAWINGS OR

SPECIFICATIONS CARRIES WITH IT THE INSTRUCTION TO

FURNISH AND INSTALL THE ITEM.

9. CONTRACTOR SHALL BE RESPONSIBLE FOR

COORDINATING ALL WORK WITH THAT OF OTHER TRADES.

REFER TO DRAWINGS FOR COMPLETE INFORMATION

PRIOR TO BID.

10. REPLACE ALL FEATURES REMOVED OR DAMAGED

DURING THE COURSE OF THE WORK.

11. ALL WORK MUST COMPLY WITH THE REQUIREMENTS OF

LOCAL CODES AND ORDINANCES. WHERE INSPECTIONS

ARE REQUIRED BY AUTHORITIES HAVING JURISDICTION,

WORK MUST NOT BE CONCEALED UNTIL INSPECTIONS

AND TESTING ARE COMPLETED AND ACCEPTED.

12. ALL WIRING INSTALLED FOR CONTROLS, POWER,

INTERLOCKS, ETC. WHICH ARE TO BE INSTALLED IN

OCCUPIED SPACES OR IN RETURN AIR PLENUMS MUST BE

PLENUM RATED OR INSTALLED IN CONDUIT UNLESS

OTHERWISE INDICATED. ALL SUCH INSTALLATIONS MUST

MEET NFPA AND NEC REQUIREMENTS AND LOCAL CODES.

13. CONDUIT RUNS INDICATED ON THE PLAN SHEETS ARE

INTENDED TO BE SCHEMATIC . THE CONTRACTOR SHALL

BE RESPONSIBLE FOR FIELD ROUTING ALL CONDUIT RUNS

AND SHALL COORDINATE ANY DEVIATION FROM ROUTING

AS INDICATED HEREIN WITH THE ENGINEER. ALL CONDUIT

SHALL BE INSTALLED IN SUCH A MANNER AS TO PREVENT

CONFLICTS WITH EQUIPMENT. EXPOSED CONDUIT SHALL

BE INSTALLED PARALLEL OR PERPENDICULAR TO BEAMS

OR STRUCTURAL CONDITIONS.

14. ALL RACEWAYS AND EQUIPMENT SHALL BE INSTALLED

AND GROUNDED IN ACCORDANCE WITH THE LATEST

EDITION OF THE NATIONAL ELECTRICAL CODE AND

APPLICABLE LOCAL CODES.

15. THE APPROXIMATE LOCATION OF EXISTING UTILITIES,

PLANT PIPING, AND STRUCTURES ARE GIVEN FOR

REFERENCE ONLY. BEFORE COMMENCING THE WORK ON

THIS CONTRACT, THE CONTRACTOR SHALL VERIFY BY

FIELD INVESTIGATION THE ACTUAL LOCATIONS OF ALL

UTILITY FACILITIES WITHIN AND ADJACENT TO THE LIMITS

OF THE WORK THAT MAY BE AFFECTED BY THE WORK.

CONFLICTS WHICH RESULT DUE TO THE NEGLIGENCE BY

THE CONTRACTOR TO LOCATE, HORIZONTALLY AND

VERTICALLY, EXISTING UTILITIES WHICH ARE SHOWN ON

THE CONSTRUCTION DRAWINGS, OR WHICH THE

CONTRACTOR HAS BEEN GIVEN NOTICE OR HAS

KNOWLEDGE OF, SHALL BE THE SOLE RESPONSIBILITY OF

THE CONTRACTOR. THE COST OF REMEDIAL WORK,

REMOVAL OF PORTIONS OF THE WORK OR EXTENSIVE

DESIGN CHANGES OCCASIONED BY THE FAILURE OF THE

CONTRACTOR TO VERIFY THE LOCATION OF EXISTING

UTILITIES AS DESCRIBED ABOVE SHALL BE BORNE BY THE

CONTRACTOR.

16. CONTRACTOR SHALL NOTIFY ENGINEER OF AND BE

PRESENT FOR THE START-UP OF ALL NEW EQUIPMENT

AND SHALL BE RESPONSIBLE FOR PROPER START-UP

PROCEDURES AS RECOMMENDED BY THE

MANUFACTURER. A MANUFACTURER REPRESENTATIVE

SHALL BE PRESENT FOR START-UP OR PRE-START-UP

INSPECTION AS REQUIRED BY THE SPECIFICATIONS AND

RECOMMENDED BY THE MANUFACTURER OF EACH

EQUIPMENT ITEM. NO EQUIPMENT WILL QUALIFY FOR

SUBSTANTIAL COMPLETION UNTIL CONTRACTOR SUBMITS

SIGNED START-UP REPORTS TO THE ENGINEER.

CITY OF ROSENBERG, TEXAS

DESIGN DRAWN DATE SHEET

REVISIONS

REV NO. DATE DESCRIPTION

CITY BID NO.: 2027-02BSD&C PID:

FILE NUMBER

SEPT.

WWTP NO. 1A CLARIFIER NO. 1

REHABILITATION PROJECT

12141 WICKCHESTER LANE SUITE 200

HOUSTON, TX 77079

(713) 491-8333

TEXAS REGISTRATION NUMBER: F-5713

100% DESIGN -

NOT FOR CONSTRUCTION

THIS DOCUMENT IS RELEASED FOR THE PURPOSE OF INTERIM

REVIEW UNDER THE AUTHORITY OF ALEC MACMANUS, P.E., #

154827 ON AUGUST 2026. IT IS NOT TO BE USED FOR

CONSTRUCTION, BIDDING, OR PERMITTING PURPOSES.

ARM ARM 01-G002

GENERAL & CIVIL NOTES

ALEC R. MACMANUS

154827 L I C E N S E D

PR O F E S S I O N A L E NG I N

EER

S T A T E O F T E X A S

DIGITALLY

REVISIONS

REV NO. DATE DESCRIPTION

CITY BID NO.: 2027-02BSD&C PID:

FILE NUMBER

SEPT.

WWTP NO. 1A CLARIFIER NO. 1

REHABILITATION PROJECT

12141 WICKCHESTER LANE SUITE 200

HOUSTON, TX 77079

(713) 491-8333

TEXAS REGISTRATION NUMBER: F-5713

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ARM ARM 0301-G003

SITE & STAGING PLAN

CLARIFIER 1 TO BE

REHABILITATED INCLUDING

DEMOLITION AND

REPLACEMENT OF EQUIPMENT.

STAGING AREA

SITE ACCESS GATEAVENUE A

N

APPROXIMATE LOCATION OF

EXISTING MCC. CONTRACTOR

SHALL REPLACE CONDUCTOR

FROM THE CLARIFIER STUB

OUT TO THE EXISTING MCC.

APPROXIMATE LOCATION OF EXISTING

3/4" CONDUIT. CONTRACTOR TO FIELD

VERIFY. CONTRACTOR SHALL REPLACE

CONDUCTOR IN EXISTING CONDUIT.

BID ALTERNATE: INSTALL DIRECT BURY

CONDUIT AND CONDUCTOR ALONG

APPROXIMATE ROUTE. INDOOR

CONDUIT ROUTING SHALL MATCH THE

NPW SYSTEM CONDUIT ROUTING AND

BE ALONG WALLS AND CEILINGS.

NOTES:

1. CONTRACTOR SHALL SIZE CONDUCTOR PER NEC

REQUIREMENTS. MINIMUM SIZE OF #12 SHALL BE

PROVIDED FOR CURRENT CARRYING CONDUCTOR.

APPROXIMATE LOCATION OF

EXISTING PULLBOXES, TYP. ALEC R. MACMANUS

154827 L I C E N S E D

PR O F E S S I O N A L E NG I N

EER

S T A T E O F T E X A S

DIGITALLY

REVISIONS

REV NO. DATE DESCRIPTION

CITY BID NO.: 2027-02BSD&C PID:

FILE NUMBER

SEPT.

WWTP NO. 1A CLARIFIER NO. 1

REHABILITATION PROJECT

12141 WICKCHESTER LANE SUITE 200

HOUSTON, TX 77079

(713) 491-8333

TEXAS REGISTRATION NUMBER: F-5713

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ARM ARM 0410-X101

CLARIFIER DEMOLITION PLAN

NOTES:

1. THE CONTRACTOR IS RESPONSIBLE FOR RETURNING AND RELOCATING ALL SALVAGE

MATERIAL TO THE CITY'S DESIGNATED SCRAP PILE ON SITE. ANY MATERIAL THE CITY DOES

NOT WISH TO KEEP SHALL BE REMOVED BY THE CONTRACTOR.

2. THE CITY WILL DEWATER AND REMOVE SLUDGE FROM THE CLARIFIER AT THE START OF

THE PROJECT. CONTRACTOR SHALL BE RESPONSIBLE FOR COORDINATING WITH THE CITY

FOR DEWATERING AND SLUDGE REMOVAL. THE CONTRACTOR IS RESPONSIBLE FOR ANY

ADDITIONAL DEWATERING AND SHALL POWER-WASH THE CLARIFIER SURFACE IN A

NON-DESTRUCTIVE MANNER.

3. CONTRACTOR TO REMOVE EXISTING GROUT TO THE FINISHED FLOOR OF THE TANK.

CONTRACTOR SHALL CHECK THE GROUT DEPTH DURING BIDDING. GROUT THICKNESS IS

UNKNOWN AND IS ASSUMED TO BE BETWEEN TWO AND EIGHT INCHES. CONTRACTOR SHALL

MAKE ANY MODIFICATIONS TO THE CLARIFIER BOTTOM REQUIRED FOR INSTALLATION OF

THE SELECTED CLARIFIER EQUIPMENT.

4. CONTRACTOR TO REPAIR ANY MINOR BREAKS OR MISSING EDGE TO THE EFFLUENT

LAUNDER EDGE TO PROVIDE A UNIFORM ELEVATION.

5. CONTRACTOR TO REMOVE SCUM PIPE SPOOL PIECE AND COORDINATE LOCATION AND

ELEVATION WITH CLARIFIER MECHANISM SUPPLIER FOR CONNECTION TO THE EQUIPMENT.

DISPOSE OF EXISTING

WALKWAY AND ASSOCIATED

COMPONENTS

DEMOLISH CLARIFIER MECHANISM,

RAKE ARMS, AND MOTOR.

DEMOLISH SCUM BOX

DEMOLISH SCUM

BAFFLE AND WEIRS

DEMOLITION 1 DEMOLITION 2

DEMOLISH SCUM

SKIMMER ARM

DEMOLITION 3

DEMOLISH SCUM

BAFFLE AND WEIRS

DEMOLISH CLARIFIER MECHANISM,

RAKE ARMS, AND MOTOR.

DEMOLISH SCUM PIPE,

SEE NOTE 5

ALEC R. MACMANUS

154827 L I C E N S E D

PR O F E S S I O N A L E NG I N

EER

S T A T E O F T E X A S

DIGITALLY

PLAN

CHAIN DRIVE

W/ OSHA APPROVED GUARD

(8'-0" SQ.) DRIVE PLATFORM

W/ 1.25" ALUMINUM I-BAR GRATING

SEE NOTE 5.

4" SCUM PIPE

(FIELD VERIFY)

(3'-6" WIDE) WALKWAY

W/ 1 1/4" ALUMINUM

I-BAR GRATING

(13'-0" INSIDE DIA.)

FEEDWELL, 3/16" PLATE

W/ SCUM PORTS & BAFFLES

(8'-0") SCUM COLLECTION BOX

CONNECT PROPOSED SCUM BOX

TO EXISTING 4" SCUM PIPE.

SEE NOTE 6.

SCUM BOX SUPPORT

(TYP. 2 PLACES)

FEEDWELL SUPPORT

(TYP. PER MANUFACTURER)

(3'-10" SQ.) RAKE ARM

W/ COUNTERWEIGHT

(ONE SIDE ONLY)

SKIMMER BLADE

CL MECHANISM

DIRECTION OF

ROTATION

EXISTING CONCRETE BASIN

DRIVE UNIT

DRIVE CONTROL

W/ LOAD INDICATOR

SKIMMER ARM

W/ SKIMMER MECHANISM

(3'-10" SQ.) RAKE ARM

W/ TAPERED SUCTION HEADER

W/ NEOPRENE SQUEEGEES

& BACK-UP BAR

W/ 316 SS FASTENERS

(ONE SIDE ONLY)

EXISTING INTERNAL LAUNDER

PROPOSED WEIRS AND BAFFLES

(FRP)

8" SLUDGE PIPE

(FIELD VERIFY)

30" INFLUENT PIPE

(FIELD VERIFY)

EXISTING NPW CONNECTION

(FIELD VERIFY)

EXISTING CONDUIT STUB OUT

(FIELD VERIFY)

PROPOSED CONDUIT

PROPOSED CONTROL PANEL

W/ DISCONNECT. CONTROL

PANEL SHALL FEED DRIVE.

6" SLUDGE PIPE

(FIELD VERIFY)

PROPOSED 1.5" NPW HEADER

SPRAY NOZZLES, TYP.

W/ ADJUSTABLE HEADS

WALKWAY SHALL EXTEND TO

THE EDGE OF THE TANK

CONNECTED AT THE RAS AND

INFLUENT PIT. GRATING AND

PIT ACCESS SHALL NOT BE

OBSTRUCTED.

PROPOSED 3/4"

HOSE BIB FOR NPW

BID ALTERNATE: DEMOLISH AND

REPLACE EXISTING AIRDROP.

CONDUIT SHALL BE

ROUTED UNDERNEATH

PLATFORM.

CITY OF ROSENBERG, TEXAS

DESIGN DRAWN DATE SHEET

REVISIONS

REV NO. DATE DESCRIPTION

CITY BID NO.: 2027-02BSD&C PID:

FILE NUMBER

SEPT.

WWTP NO. 1A CLARIFIER NO. 1

REHABILITATION PROJECT

12141 WICKCHESTER LANE SUITE 200

HOUSTON, TX 77079

(713) 491-8333

TEXAS REGISTRATION NUMBER: F-5713

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ARM ARM 0510-P101

CLARIFIER PROCESS PLAN VIEW

N

NOTES:

1. CONTRACTOR TO FIELD VERIFY LOCATION, DIMENSIONS, AND ELEVATIONS. CONTRACT DOCUMENTS

SHOW APPROXIMATE VALUES.

2. SCUM BOX SHALL BE LOCATED AS CLOSE TO THE WALKWAY AS POSSIBLE WHILE MAINTAINING A

MINIMUM OF 5% SLOPE TO EXISTING SCUM DRAIN.

3. CONCRETE REPAIRS SHALL BE DETERMINED BY ENGINEER INSPECTION FOLLOWING CLEANING AND

GROUT REMOVAL. REPAIRS SHALL BE COMPLETED PER SPECIFICATION DIVISION 03 AND PROTECTIVE

COATING APPLIED PER SPECIFICATION DIVISION 09 96 00.

4. SCUM SPRAY NOZZLES SHALL BE CONNECTED TO THE EXISTING NON-POTABLE WATER SYSTEM WITH A 1-1/2" PVC LINE EXTENDED FOR THE SPRAY SYSTEM AND LANDING HOSE BIB INSULATED AND

MARKED PURPLE WITH PAINT OR BANDS.

5. GRATING SHALL BE REMOVABLE FOR MAINTENANCE AND REPAIR ACCESS OF CLARIFIER DRIVE AND

EQUIPMENT. CONDUIT SHALL BE UNDER DRIVE PLATFORM.

6. THREE SCUM BOX FLUSH SPRAY NOZZLES SHALL BE MOUNTED FROM THE EXTERIOR WALL OF THE CLARIFIER ABOVE THE INLET OF THE SCUM BOX. APPROPRIATE SPACE SHALL BE PROVIDED TO ALLOW FOR THE SKIMMER BLADE TO PASS BETWEEN THE NOZZLES AND SCUM BOX. NPW SHALL BE

FIELD ROUTED TO THE FLUSH SPRAY NOZZLES.

7. PROPOSED CONDUIT AND NPW PIPING SHALL BE SECURED ONTO STRUCTURE USING 316 STAINLESS

STEEL UNISTRUT, HARDWARE, AND STRAPS.

8. THIS IS A CLASS 1 DIVISION 2 AREA AND ALL EQUIPMENT SHALL BE RATED TO MEET THE CRITERIA.

9. EQUIPMENT, INCLUDING CONTROL PANELS OR LIGHTING, SHALL NOT BE SUPPORTED FROM

HANDRAILS.

NOT TO

SCALE

KEY NOTES:

CONTRACTOR SHALL MATCH CONDUIT SIZE TO EXISTING BELOW GRADE

CONDUIT. CONDUCTORS FROM THE EXISTING CONDUIT STUB UP TO THE

MCC SHALL BE PULLED AND REPLACED BY #12 CONDUCTOR.

2 ALL ABOVE GROUND CONDUITS SHALL BE A MINIMUM OF 3/4"

PVC COATED RIGID GALVANIZED STEEL.

ALEC R. MACMANUS

154827 L I C E N S E D

PR O F E S S I O N A L E NG I N

EER

S T A T E O F T E X A S

DIGITALLY

ILLUSTRATIVE ELEVATION

COUNTER WEIGHT

FOR BALANCING ARM

31'2" (q OF MECHANISM TO END OF WALKWAY)

CL MECHANISM

WEIR BOTTOM OF V-NOTCH

ELEVATION: 104.76

INTERNAL LAUNDER

(REF.)

(3'-10") SQ. RAKE ARM

(TYP. BOTH SIDES)

SKIMMER BLADE

(30" DIA.) INFLUENT COLUMN

W/ 1/4" PL.

(6'-0" DIA.) SLUDGE

MANIFOLD

(3'-0" SQ.) CENTER CAGE

FEEDWELL

SUPPORTS

TAPERED SUCTION HEADER

W/ NEOPRENE SQUEEGEES & BACK-UP BAR

W/ 316 SS FASTENERS

(ONE SIDE ONLY)

FLUSHING MECHANISM

W/ ACTUATOR VALVE

SCUM BOX SUPPORT, OFFSET

FROM EXISTING SCUM BOX

ANCHORS

4" SCUM PIPE

(FIELD VERIFY)

TRUSS WALKWAY

(TRUSS TOP MEMBER

ACTS AS HANDRAIL)

DRIVE PLATFORM

W/ 2-RAIL HANDRAIL-MECHANICAL

1 1/2" DIA. ALUMINUM SUPPLIED

W/SUB ASSEMBLED POSTS AND

W/ 4" EXTRUDED TOE BOARD

(6'-0" DIA.) EDI, 3/16" PL.

W/ OUTLET SCOOPS

WEIRS AND BAFFLES

(FRP)

9'

1.

5"

(S

ID

E W

AT

ER

D

EP

TH

8" SLUDGE PIPE

(FIELD VERIFY)

30" INFLUENT PIPE

(FIELD VERIFY)

DRAIN SUMPPROPOSED GROUT SHALL BE A MINIMUM

OF 2". GROUT DEPTH SHALL BE DICTATED

BY SELECTED MANUFACTURER.

(13'-0" DIA.) FEEDWELL, 3/16" PL.

W/ SCUM PORTS AND BAFFLES

60'-0"INSIDE TANK DIAMETER = 316 SS ANCHOR BOLTS

(TYP.)

BOTTOM OF CLARIFIER

ELEVATION: 94.80

TOP OF WALL ELEVATION: 106.80

GROUT TO BE EVEN ACROSS CLARIFIER.

SPRAY SYSTEM SHALL

BE SUPPORTED FROM

WALKWAY

26'1" (q OF MECHANISM TO SCUM BAFFLE)

26'10" (q OF MECHANISM TO EFFLUENT WEIR)

PROTECTIVE COATING TO BE

APPLIED. (SEE NOTE 4.)

CONNECT AND

EXTEND SCUM DRAIN

CITY OF ROSENBERG, TEXAS

DESIGN DRAWN DATE SHEET

REVISIONS

REV NO. DATE DESCRIPTION

CITY BID NO.: 2027-02BSD&C PID:

FILE NUMBER

SEPT.

WWTP NO. 1A CLARIFIER NO. 1

REHABILITATION PROJECT

12141 WICKCHESTER LANE SUITE 200

HOUSTON, TX 77079

(713) 491-8333

TEXAS REGISTRATION NUMBER: F-5713

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ARM ARM 0610-P301

CLARIFIER PROCESS SECTION VIEW

NOTES:

1. CONTRACTOR TO FIELD VERIFY LOCATIONS, DIMENSIONS, AND

ELEVATIONS. CONTRACT DOCUMENTS SHOW APPROXIMATE VALUES.

2. SCUM BOX SHALL BE LOCATED AS CLOSE TO THE WALKWAY AS POSSIBLE

WHILE MAINTAINING A MINIMUM OF 5% SLOPE TO EXISTING SCUM DRAIN.

3. CONCRETE REPAIRS SHALL BE DETERMINED BY ENGINEER INSPECTION

FOLLOWING CLEANING AND GROUT REMOVAL. REPAIRS SHALL BE

COMPLETED PER SPECIFICATION DIVISION 03 AND PROTECTIVE COATING

APPLIED PER SPECIFICATION DIVISION 09 96 00.

4. SIDE WALLS OF THE LAUNDER SHALL BE RECOATED INCLUDING THE

BOTTOM OF THE LAUNDER AND FROM THE BOTTOM OF THE LAUNDER TO

18 INCHES ABOVE THE BOTTOM OF THE LAUNDER. THE EXTERIOR OF THE

LAUNDER FACING THE CENTER OF THE CLARIFIER SHALL BE RECOATED

FROM THE TOP DOWN 6 INCHES. PROTECTIVE COATING TO BE APPLIED

PER SPECIFICATION DIVISION 09 96 00.

5. SUCTION HEADER SHALL BE INSTALLED FLAT ON THE CLARIFIER BASIN

SURFACE.

ALEC R. MACMANUS

154827 L I C E N S E D

PR O F E S S I O N A L E NG I N

EER

S T A T E O F T E X A S

DIGITALLY

REVISIONS

REV NO. DATE DESCRIPTION

CITY BID NO.: 2027-02BSD&C PID:

FILE NUMBER

SEPT.

WWTP NO. 1A CLARIFIER NO. 1

REHABILITATION PROJECT

12141 WICKCHESTER LANE SUITE 200

HOUSTON, TX 77079

(713) 491-8333

TEXAS REGISTRATION NUMBER: F-5713

100% DESIGN -

NOT FOR CONSTRUCTION

THIS DOCUMENT IS RELEASED FOR THE PURPOSE OF INTERIM

REVIEW UNDER THE AUTHORITY OF ALEC MACMANUS, P.E., #

154827 ON AUGUST 2026. IT IS NOT TO BE USED FOR

CONSTRUCTION, BIDDING, OR PERMITTING PURPOSES.

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ARM ARM 0799-P101

DETAILS

8-FOOT SCUM BEACH*

(NOT INCLUDED)

1.5" Sch 80 PVC Pipe

NOT TO SCALE

(BID ALTERNATE)

(BID ALTERNATE)

NOT TO SCALE

ALEC R. MACMANUS

154827 L I C E N S E D

PR O F E S S I O N A L E NG I N

EER

S T A T E O F T E X A S

DIGITALLY