15-Drawings.pdf

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HCFCD PROJECT ID# Z100-00-00-X368

CONCRETE CHANNEL LINING REPAIRS-NORTH

STATE OF TEXAS

PROFESS IONAL ENG IN

EERL I CENSED

10/07/2025

JOHN C. SMAISTRLA

92905

LESLEY BRIONES

TOM S. RAMSEY, P.E.

ADRIAN GARCIA

RODNEY ELLIS

COUNTY JUDGE LINA HIDALGO

PCT. 2 PCT. 4

PCT. 3PCT. 1

CHRISTINA (TINA) PETERSEN, PHD, P.E.EXECUTIVE DIRECTOR

COVER SHEET

VICINITY MAP

INTERCEPTOR STRUCTURE DETAILS

STORM SEWER AND RIPRAP DETAILS

CONCRETE CHANNEL LINING DETAILS

GENERAL NOTES 1

PIPE INSTALLATION DETAILS

CONCRETE REPAIR AT SHEET PILE

RCP AND RCB BEDDING DETAILS

CONCRETE SAWCUT AND TIE-IN DETAILS

LOW FLOW WALL REPAIR DETAILS*

ALLIGATOR SNAPPING TURTLE EXCLUSION FENCE DETAIL

STORM SEWER TYPE C PRECAST ROUND MANHOLE (COH)

STORM SEWER PRECAST BOX MANHOLE (COH)

STORM SEWER TYPE C BRICK ROUND MANHOLE (COH)

STORM SEWER PRECAST MANHOLE DETAILS (HCED)

STORM SEWER PRECAST JUNCTION BOX MANHOLE (HCED)

STORM SEWER TYPE E INLET DETAIL

STORM SEWER MH & INLET FRAME & COVER DETAILS (COH)

STORM SEWER INLET GRATE & FRAME DETAILS (COH)

DRAWING INDEX

SHEET NO. DESCRIPTION

THE STANDARD SHEETS SPECIFICALLY

IDENTIFIED ABOVE (*) HAVE BEEN SELECTED

BY ME OR UNDER MY RESPONSIBLE

SUPERVISION AS BEING APPLICABLE TO

THIS PROJECT.

STORMWATER POLLUTION PREVENTION PLAN DETAILS21

Issued for Bidding 10/31/2025 Job 25-0338

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9900 Northwest Freeway Houston, Texas 77092

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212 OF

SCALE: NTS

DATE: OCTOBER 2025

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10 10

610 610

99 99

PRECINCT

NORTH 1960

4 NEW PRECINT MAP 6-22-2022

PRECINCT 2

PRECINCT 3

PRECINCT 4

LEGEND:

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SERVICE AREA NOT IN

CONTRACT

ST

ATE OF TEXAS

PROFESS IONAL ENGIN

EE

RL I CENSED

JOHN C. SMAISTRLA

92905

10/07/2025

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HCFCD GENERAL NOTES:

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

FENCES AND/OR OTHER ENCROACHMENTS IN THE HCFCD RIGHT-OF-WAY ARE NOT TO BE REMOVED UNLESS DIRECTED BY THE ENGINEER OR HIS DESIGNEE AT THE PRE-CONSTRUCTION MEETING, THE FENCE SHALL BE REMOVED AND PLACED

NEATLY ON THE ADJACENT PROPERTY AT THE START OF CONSTRUCTION.

DO NOT ENTER PRIVATE PROPERTY WITHOUT PROPER WRITTEN AUTHORIZATION FROM THE OWNER. PROVIDE COPY OF

WRITTEN PERMISSION TO HCFCD.

STRIP VEGETATION AND TOPSOIL AND STOCKPILE FOR REUSE ONSITE. MATERIAL FOUND UNACCEPTABLE BY THE ENGINEER WILL BE REMOVED AND PAID AS EXCAVATION AND OFFSITE DISPOSAL. NO SEPARATE MEASUREMENT AND PAYMENT WILL BE MADE FOR STRIPPING, STOCKPILING AND PLACING ON-SITE TOPSOIL. THE COST FOR THIS WORK WILL BE INCIDENTAL TO RELATED PAY ITEMS UNDER SPECIFICATION SECTION NUMBER 02315 LISTED ON THE UNIT PRICE

SCHEDULE.

RIPRAP AND GRANULAR FILL MATERIAL REMOVED DURING EXCAVATION, MEETING SPECIFICATION SECTION NUMBER 02378, SHALL BE REUSED AS DIRECTED BY THE ENGINEER. REUSED MATERIAL WILL BE MEASURED AND PAID FOR AS EXCAVATION AND ON-SITE FILL UNDER SPECIFICATION NUMBER 02315. NO SEPARATE MEASUREMENT OR PAYMENT WILL BE MADE FOR PROCESSING, HANDLING, STOCKPILING, AND PLACING MATERIAL FOUND TO BE ACCEPTABLE FOR REUSE.

UPON APPROVAL OF THE ENGINEER, DISPOSAL OF NONCONFORMING RIPRAP AND GRANULAR FILL MATERIAL WILL BE MEASURED AND PAID FOR AS REMOVE AND DISPOSE OF CONCRETE RUBBLE UNDER SPECIFICATION SECTION NUMBER

02120, MATERIAL DISPOSAL.

THE LOCATION AND GRADE OF THE BACKSLOPE INTERCEPTOR STRUCTURES AND SWALES MAY BE ADJUSTED IN THE FIELD BY THE ENGINEER OR HIS DESIGNEE AT THE TIME OF CONSTRUCTION. UNLESS OTHERWISE INSTRUCTED BY THE ENGINEER OR HIS DESIGNEE, THE BACKSLOPE INTERCEPTOR STRUCTURE SHALL BE SET AT A MAXIMUM DEPTH OF 2.5

FEET AND THE MINIMUM GRADE FOR BACKSLOPE SWALES SHALL BE 0.2%.

ADJUST AND/OR EXTEND YARD DRAINS AS DIRECTED IN THE FIELD AT THE TIME OF CONSTRUCTION. PAYMENT WILL BE

INCIDENTAL TO SITE PREPARATION AND RESTORATION.

COMPLETED SECTIONS OF THE CHANNEL WILL BE TURNED OVER FOR VEGETATION ESTABLISHMENT IN MAXIMUM 1500 LINEAR FOOT SEGMENTS. CONTRACTOR MAY NOT DISTURB GREATER THAN 1500 LF OF CHANNEL AT A TIME.

CLEAR AND REMOVE ALL SILT FROM CULVERTS, PIPES AND UNDER BRIDGES TO THE PROPOSED DESIGN GRADES TO

PROVIDE POSITIVE FLOW.

LENGTHS AND DIAMETERS REPRESENTED ON PLANS ARE APPROXIMATE. CONTRACTOR WILL BE RESPONSIBLE FOR FIELD

VERIFICATION PRIOR TO ORDERING MATERIALS.

ACTIVITIES THAT DISTURB BIRD HABITAT, INCLUDING BUT NOT LIMITED TO CLEARING, GRUBBING, AND IMPACTS TO STRUCTURES WHERE MIGRATORY BIRDS AND BALD EAGLES MIGHT NEST, REQUIRE A NEST HABITAT SURVEY. DO NOT PROCEED UNTIL HARRIS COUNTY FLOOD CONTROL DISTRICT HAS CONDUCTED A NEST HABITAT SURVEY TO VERIFY ACTIVE MIGRATORY BIRD NESTS AND BALD EAGLE NESTS ARE NOT PRESENT. THE HARRIS COUNTY FLOOD CONTROL

DISTRICT MUST PROVIDE WRITTEN AUTHORIZATION TO PROCEED.

WHEN BANK EROSION REPAIRS CALL FOR THE PLACEMENT OF 3"x5" GRANULAR FILL IN THE CHANNEL BOTTOM TO ESTABLISH A BASE FOR REBUILDING THE SLOPE. THE 3"x5" GRANULAR FILL SHALL BE LIMITED TO AN ELEVATION 6-INCHES

ABOVE THE NORMAL WATER SURFACE ELEVATION LEVEL.

THE CONTRACT CONTAINS UNIT ITEMS FOR THE ESTABLISHMENT OF BEST MANAGEMENT PRACTICES FOR STORM WATER QUALITY PURPOSES. WHEN NOT CALLED FOR IN THE PROJECT PLANS, COORDINATE THE NEED AND LOCATION OF THESE UNIT ITEMS WITH THE DISTRICT REPRESENTATIVE ON SITE PRIOR TO PLACEMENT. THESE UNIT ITEMS INCLUDE, BUT ARE NOT LIMITED TO, REINFORCED SILT FENCE FOR MATERIAL STOCKPILES, ANCHORED SODDING FOR DISTURBED EARTHEN AREAS OR AROUND CONCRETE AND CONCRETE INTERCEPTOR, AND STABILIZED CONSTRUCTION ACCESS FOR PROJECT

SITE INGRESS/EGRESS.

WHEN INCLUDED IN THE SCOPE OF WORK, THE PURPOSE OF DEEP PLOWING THE SLOPE OR BERM OF A CHANNEL IS TO BREAK UP THE DESICCATED SOILS AND TO ELIMINATE ANY VOIDS, OR RILLING CLOSE TO THE SURFACE OF THE SLOPE OR BERM. THE CONTRACTOR WILL DEEP PLOW THE SLOPE OR BERM TO A MINIMUM DEPTH OF 2 FEET IN AREAS CONTAINING VOIDS AND/OR RILLING. IN AREAS OF VOIDS ONLY, THE SURFACE FROM WHICH THE 2 FEET DEPTH IS MEASURED WILL BE THE LEVEL OF THE SURROUNDING UNDISTURBED SOIL. IN AREAS OF RILLING, THE RILLS WILL FIRST BE KNOCKED DOWN AND LEVELED OFF. THE 2 FEET DEPTH WILL THEN BE MEASURED FROM THIS NEW SURFACE. THE CONTRACTOR WILL

DETERMINE THE MEANS AND METHODS FOR DEEP PLOWING.

12.

CENTERPOINT ENERGY RESOURCES CORP. (GAS)

CAUTION: UNDERGROUND GAS FACILITIES

CENTERPOINT ENERGY HOUSTON ELECTRIC LLC

WARNING: OVERHEAD ELECTRICAL FACILITIES

ACTIVITIES ON/OR ACROSS CENTERPOINT ENERGY FEE OR EASEMENT PROPERTY

NO APPROVAL TO USE, CROSS OR OCCUPY CENTERPOINT FEE OR EASEMENT PROPERTY IS GIVEN. IF YOU NEED TO USE CENTERPOINT PROPERTY, PLEASE CONTACT OUR SURVEYING & RIGHT OF WAY DIVISION AT (713) 207-6348 OR (713) 207-5769.

AT&T TEXAS/SWBT FACILITIES

DIRECT BURIED CABLE PROCEDURE

1. THE LOCATIONS OF AT&T TEXAS/SWBT FACILITIES ARE SHOWN IN AN APPROXIMATE WAY ONLY. THE CONTRACTOR SHALL DETERMINE THE EXACT LOCATION BEFORE COMMENCING WORK. HE AGREES TO BE FULLY RESPONSIBLE FOR ANY AND ALL DAMAGES WHICH MIGHT BE OCCASIONED BY THIS FAILURE TO EXACTLY LOCATE AND PRESERVE THESE

UNDERGROUND UTILITIES.

2. THE CONTRACTOR SHALL CALL 1-800-344-8377 (TEXAS 811) A MINIMUM OF 48 HOURS PRIOR TO CONSTRUCTION TO

HAVE UNDERGROUND LINES FIELD LOCATED.

3. WHEN EXCAVATING WITHIN EIGHTEEN INCHES (18”) OF THE INDICATED LOCATION OF AT&T TEXAS/SWBT FACILITIES, ALL EXCAVATIONS MUST BE ACCOMPLISHED USING NON-MECHANIZED EXCAVATION PROCEDURES. WHEN BORING, THE CONTRACTOR SHALL EXPOSE THE AT&T TEXAS/SWBT FACILITIES.

4. WHEN AT&T TEXAS/SWBT FACILITIES ARE EXPOSED, THE CONTRACTOR WILL PROVIDE SUPPORT TO PREVENT DAMAGE TO THE CONDUIT DUCTS OR CABLES. WHEN EXCAVATING NEAR TELEPHONE POLES THE CONTRACTOR

SHALL BRACE THE POLE FOR SUPPORT.

5. THE PRESENCE OR ABSENCE OF AT&T TEXAS/SWBT UNDERGROUND CONDUIT FACILITIES OR BURIED CABLE FACILITIES SHOWN ON THESE PLANS DOES NOT MEAN THAT THERE ARE NO DIRECT BURIED CABLES OR OTHER

CABLES IN CONDUIT IN THE AREA.

6. PLEASE CONTACT THE AT&T TEXAS DAMAGE PREVENTION MANAGER ROOSEVELT LEE JR. AT (713)567-4552 OR E-MAIL HIM AT RL7259@ATT.COM, IF CABLE LOCATE REQUEST(S) ARE NOT COMPLETED FOR OUR AT&T TEXAS/SWBT

FACILITIES.

DIRECT BURIED CABLE RECORDS ARE NOT AVAILABLE. TO DETERMINE THE LOCATION OF DIRECT BURIED CABLE PLANT

DURING THE DESIGN PHASE OF YOUR PROJECT, FOLLOW THE PROCEDURE OUTLINED BELOW:

• CALL 1-800-344-8377 (TEXAS 811) AND ADVISE YOU NEED THE EXISTING AT&T TEXAS/SWBT FACILITIES LOCATED FOR THE DESIGN PHASE OF YOUR PROJECT PLEASE ALLOW AT LEAST 72 HOURS FOR THE CABLES TO GET MARKED BEFORE SENDING YOUR FIELD CREW FOR BASE LINE SURVEY FOR LOCATES OF. BE SPECIFIC ON THE PROJECT LOCATION.

• THE LOCATOR WILL FIELD LOCATE THE EXISTING AT&T TEXAS/SWBT FACILITIES WITH ORANGE PAINT AND/OR FLAGS.

THE CONTRACTOR SHALL CONTACT THE UTILITY COORDINATING COMMITTEE AT 1-800-545-6005 OR 811 A MINIMUM OF 48

HOURS PRIOR TO CONSTRUCTION TO HAVE MAIN AND SERVICE LINES FIELD LOCATED.

· WHEN CENTERPOINT ENERGY PIPE LINE MARKINGS ARE NOT VISIBLE, CALL (713) 207-5463 OR (713- 945-8037 (7:00

A.M. TO 4:30 P.M.) FOR STATUS OF LINE LOCATION REQUEST BEFORE EXCAVATION BEGINS.

· WHEN EXCAVATING WITHIN EIGHTEEN INCHES (18”) OF THE INDICATED LOCATION OF CENTERPOINT ENERGY FACILITIES, ALL EXCAVATION MUST BE ACCOMPLISHED USING NON-MECHANIZED EXCAVATION PROCEDURES.

· WHEN CENTERPOINT ENERGY FACILITIES ARE EXPOSED, SUFFICIENT SUPPORT MUST BE PROVIDED TO THE

FACILITIES TO PREVENT EXCESSIVE STRESS ON THE PIPING.

· FOR EMERGENCIES REGARDING GAS LINES CALL (713) 659-3552 OR (713) 207-4200.

THE CONTRACTOR IS FULLY RESPONSIBLE FOR ANY DAMAGES CAUSED BY HIS FAILURE TO EXACTLY LOCATE AND

PRESERVE THESE UNDERGROUND FACILITIES.

OVERHEAD LINES MAY EXIST ON THE PROPERTY. THE LOCATION OF OVERHEAD LINES HAS NOT BEEN SHOWN ON THESE DRAWINGS AS THE LINES ARE CLEARLY VISIBLE, BUT YOU SHOULD LOCATE THEM PRIOR TO BEGINNING ANY CONSTRUCTION. TEXAS LAW, SECTION 752, HEALTH & SAFETY CODE FORBIDS ACTIVITIES THAT OCCUR IN CLOSE PROXIMITY

TO HIGH VOLTAGE LINES, SPECIFICALLY:

· ANY ACTIVITY WHERE PERSON OR THINGS MAY COME WITHIN SIX(6) FEET OF LIVE OVERHEAD HIGH VOLTAGE LINES; AND

· OPERATING A CRANE, DERRICK, POWER SHOVEL, DRILLING RIG, PILE DRIVER, HOISTING EQUIPMENT, OR SIMILAR

APPARATUS WITHIN 10 FEET OF LIVE OVERHEAD HIGH VOLTAGE LINES.

PARTIES RESPONSIBLE FOR THE WORK, INCLUDING CONTRACTORS ARE LEGALLY RESPONSIBLE FOR THE SAFETY OF CONSTRUCTION WORKERS UNDER THIS LAW. THIS LAW CARRIES BOTH CRIMINAL AND CIVIL LIABILITY. TO ARRANGE FOR

LINES TO BE TURNED OFF OR REMOVED CALL CENTERPOINT ENERGY AT (713) 207-2222.

UTILITY NOTES

13.

THE PURPOSE OF THE CHANNEL DESILT IS TO RESTORE POSITIVE DRAINAGE DURING LOW FLOW CONDITIONS. UNLESS SPECIFICALLY STATED OTHERWISE, IT IS NOT THE INTENT OF THE PROJECT TO DEEPEN THE CHANNEL BEYOND ITS ORIGINAL DESIGN CONFIGURATION. EXCAVATION OF SILT SHOULD NOT UNDERMINE THE TOE OF THE SLOPE.

CITY OF HOUSTON (COH) AND HARRIS COUNTY ENGINEERING DEPARTMENT (HCED) DETAILS ARE INCLUDED IN THIS PLAN SET.

CONTRACTOR SHALL USE COH DETAILS FOR ITEMS LOCATED WITHIN COH ROW AND HCED DETAILS FOR ITEMS LOCATED WITHIN HARRIS COUNTY ROW. ALL MANHOLES ARE ASSUMED TO BE PRE-CAST OR CAST-IN-PLACE UNLESS OTHERWISE DIRECTED BY THE

ENGINEER OR HIS DESIGNEE.

ITEM 3310-61 EXTRA REINFORCING STEEL IS INCLUDED IN THE CONTRACT TO PAY FOR ADDITIONAL REINFORCING STEEL REQUIRED BEYOND WHAT IS SHOWN IN THE STANDARD DETAILS. REINFORCING STEEL SHOWN IN THE DETAILS SHALL BE CONSIDERED

INCIDENTAL TO THE APPROPRIATE CORRESPONDING UNIT ITEM.

CONSTRUCTION CONTRACT NOTES:

1.

2.

3.

Houston, Texas 77092 9900 Northwest Freeway

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RL I CENSED

10/07/2025

JOHN C. SMAISTRLA

92905

OCTOBER 2025

CONSTRUCTION

R O

W

6 IN.

8 IN. CONCRETE BRICK

WALLS AND FLOOR SHALL BE

6 IN. REINFORCED STRUCTURAL

CONCRETE OR WALLS MAY BE

GROUT

2 FT.

5 IN.

FT

3 FT.4 FT.

1 FT.

10 FT. TYP.

1 FT.

3 FT.

FT

TY

P.

3 FT.4 FT.

10 FT. TYP.

1 FT.8 IN.

3 FT.

D 10 F

T.

T

YP

D

(24 INCH ONLY)

INTERCEPTOR STRUCTURE

D SECTION

PLAN

F

T.

T

YP

C

IN

VA

R

IE

S

FT

. 6

IN

M

AX

R O

W

FT

TY

P.

6 IN.

FT

VARIES

12 FT. TYP.

1.

:1

VARIES

8 IN.

2:1

F

T.

T

YP

1 FT.

B

IN

1 FT.

PLAN

SLOPE

VARIES

12 FT. TYP.

5 FT.

5 FT. TYP.

SECTION

(42 INCH MAX.)

IN

M

AX

8 IN.

FT

. 6

IN

5 IN.

6 IN.

R O

W

B C

6 FT. TYP.

1.

:1

10 FT. TYP.

8 IN.

5 FT.

B

VA

R

IE

S

IN

8 IN.

A

PLAN

5 FT.

10 FT. TYP.

TY

P.

FT

FT

M

AX

FT

4 FT.

IN

FLOWLINE

12 FT. TYP.

A10 F

T.

T

YP

R O

W

10° - OUTFALL

STRUCTURE

INTERCEPTOR

1 FT.

6 IN.

5 FT. 6 IN.

R O

W

INTERCEPTOR STRUCTURE

TYPICAL OFFSITE DITCH

(42 INCH MAX.)

SECTION

PLAN

#4 BARS

ON 8 IN.

1.

5:

CL

CHANNEL

BOTTOM

PLAN

FABRICATED

ELBOW

TYPICAL INTERCEPTOR OUTFALL

STRUCTURE LAYOUT

C BACKSLOPE SWALE

(24 INCH & 30 INCH ONLY)

INTERCEPTOR STRUCTURE

TYPICAL BACKSLOPE

SECTION

CENTERS

SEE NOTE 2.

CENTERS

ON 8 IN.

#4 BARS

CENTERS

ON 8 IN

#4 BARS

SLOPE 6 IN.

20 FT. (MIN.)

1 FT.

R O

W

6 IN.

8 IN.

2:1

VARIES

2:1

OFFSITE DITCH

3:1 3:1

1 FT.

1 FT. 8 IN.

1 FT.

8 IN. 8 IN.

8 IN.

FT

TY

P.

8 IN.

COUPLER DETAILS.

SEE BAND

BAND COUPLER.

VARIES

SLOPE

TY

P.

FT

L

OFFSITE SWALE

OR MATCH

SLOPE

OFFSITE SWALE

OR MATCH

SLOPE

AS

SLOPE

12 FT. TYP.

SEE NOTE 2.

BACKSLOPE

SWALE

URBAN BACKSLOPE

C

8 IN.

FT

1 FT.

8 IN.

8 IN.

IN

.8 IN.1 FT.

1 FT.

A

IN

IN

INTO SLOPE

5 FT. MIN.

BAND

COUPLER

COUPLER DETAIL

CMP BAND

SEE NOTE 2.

2 FT. MIN.

CEMENT STABILIZED

SECTION

SAND ALL AROUND

SEE NOTE 2.

6 IN. MIN.

TY

P.

FT

IN

FT

. 6

IN

SEE NOTE 7.

CEMENT STABILIZED

SAND ALL AROUND PIPE.

SEE NOTE 2.

BEDDING HDPE

IN

IN

BEDDING

SEE NOTE 5. SEE NOTE 5.

COUPLER DETAIL

HDPE PIPE

HIGH DENSITY CORRUGATED

POLYETHYLENE (HDPE) SMOOTH

LINED PIPE.

USE BELL & SPIGOT JOINT

SOIL AND WATER TIGHT

SEE NOTE 5.

SEE NOTE 5.

NECESSARY

CMP OR HDPE PIPE

SEE NOTE 1.

CMP OR HDPE PIPE

SEE NOTE 1.

INTO SLOPE

5 FT. MIN.

1/2 IN.

ALL AROUND

MIN.

1'-3"NEW PIPE

MAX.

EXISTING PIPE

6 IN. MIN.

MIN.

(TYP.)

EXISTING PIPE

IN

1'-3"

IN

M

IN

IN

SEE NOTE 8.

1.

5:

CMP DETAIL

SEE NOTE 10.

SEE NOTE 10.

SEE NOTE 10

SEE NOTE 10.

CEMENT STABILIZED

SAND (3 FT AROUND BOX)

M

IN

BACKSLOPE

INTERCEPTOR

SHOWN. SEE

PLANS FOR

DESIGNATED

STRUCTURE OR

AS DIRECTED BY

ENGINEER.

WRAP JOINT WITH

30# X 12 IN.

ASPHALT FELT.

SEE

NOTE 9.

COMBINATION BACKSLOPE &

OFFSITE DITCH INTERCEPTOR STRUCTURE

SEE NOTE 10SEE NOTE 10SEE NOTE 10SEE NOTE 10

SEE NOTE 9.

M

IN

SEE NOTE 2.

SEE NOTE 2. SEE NOTE 2.

6 IN.

M

AX

NOTE:

WRAP JOINT WITH

30# X 12 IN.

ASPHALT FELT.

E

E SECTION

G

E

SEE NOTE 2.

1.5 O.D. + 12 IN. MIN.

DETAIL 24" - 42" PIPES

CONCRETE COLLAR

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OF

Houston, Texas 77092 9900 Northwest Freeway

DATE: OCTOBER 2025

5 IN.

3 FT.4 FT.

1 FT.

10 FT. TYP.

1 FT.

3 FT.

1.

FT

TY

P.

3 FT.4 FT.

10 FT. TYP.

1 FT.8 IN.

3 FT.

D D

DETENTION BASIN

D SECTION

PLAN

2:1 2:1

1 FT. 8 IN.

8 IN. 8 IN.

FT

CONCRETE PILOT CHANNEL -

IN

IN

SEE NOTE 6.

PIPE DETAIL

5 FT. MIN.

BAND COUPLER

2 FT. MIN.

DETENTION BASIN

TO CHANNEL

0° - OUTFALL TO

G

G

2 FT. MIN.

2 FT. MIN.

BAND COUPLER

5 FT. MIN.

AT TOE OF SLOPE *

AT TOE OF SLOPE *

1 FOOT ABOVE FLOWLINE *

5 FT. MIN.

BAND COUPLER

6 FEET ≤ BW ≤ 20 FT

5 FT. MIN.

5 FT. MIN. 12

IN

BOTTOM WIDTH

BW > 60 FT

PIPE OUTLET INVERT

PIPE OUTFALL IN CHANNELS

20 FEET < BW ≤ 60 FT

* OR 1 FOOT ABOVE NORMAL

WATER LEVEL, WHICHEVER IS

HIGHER

IN

(CMP, RCP, OR

HDPE)

12 IN.

FELT

SEE TABLE

BELOW

PIPE OUTFALL IN

AT TOE OF SLOPE

DETENTION BASINS

4 21

ST

ATE OF TEXAS

PROFESS IONAL ENGIN

EE

RL I CENSED

10/07/2025

JOHN C. SMAISTRLA

92905

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INTERCEPTOR OUTFALL PIPES WITHIN THE HCFCD RIGHT-OF-WAY SHALL BE CMP OR HDPE PIPE IN

ACCORDANCE WITH SPECIFICATION SECTION 02642- CORRUGATED METAL PIPE, HIGH DENSITY

POLYETHYLENE (HDPE) PIPE IN ACCORDANCE WITH SPECIFICATION SECTION 2505-HIGH DENSITY POLYETHYLENE, OR APPROVED EQUAL. USE TABLE ON STORM SEWER AND RIPRAP DETAILS SHEET FOR

CORRUGATED GALVANIZED STEEL PIPE THICKNESS.

PROVIDE AND PLACE CEMENT STABILIZED SAND IN ACCORDANCE WITH SPECIFICATION SECTION

02321-CEMENT STABILIZED SAND AND SECTION 02316 - STRUCTURAL EXCAVATING.

EXCAVATION, FILL AND BACKFILL FOR INTERCEPTOR OUTFALLS SHALL BE IN ACCORDANCE WITH

SPECIFICATION SECTION 02316-STRUCTURAL EXCAVATING AND BACKFILLING.

CONCRETE SHALL BE STRUCTURAL CONCRETE IN ACCORDANCE WITH SPECIFICATION SECTION

03310-CONCRETE.

INTERCEPTOR STRUCTURES:

ADJUST LENGTH AND WIDTH IN FIELD AS NECESSARY.

2-FEET DEEP X 8-INCH WIDE TOE ALL AROUND THE STRUCTURE.

STEEL REINFORCING-#4 BARS (GRADE 60) AT 12 INCHES ON CENTER

EACH WAY.

ANY INTERCEPTOR OUTFALL PIPE LARGER THAN MAXIMUM SIZE

INDICATED REQUIRES A SEPARATE DETAIL.

MATCH TOP OF CONCRETE WITH NATURAL GROUND.

CONCRETE PILOT CHANNEL

1.5 FEET DEEP X 8-INCH WIDE TOE ALL AROUND THE STRUCTURE.

STEEL REINFORCING - #4 BARS (GRADE 60) AT 12 INCHES ON CENTER EACH WAY.

MATCH TOP OF CONCRETE WITH BOTTOM OF DETENTION BASIN.

URBAN BACKSLOPE INTERCEPTOR STRUCTURE: CONCRETE PAD, INLET, AND GRATE PAID FOR AS URBAN INTERCEPTOR STRUCTURE 02632-05. GRATE TOP, EAST JORDAN IRON WORKS, V-4880-1, OR APPROVED

EQUAL, APPROX. 489 SQ.IN. OPENING.

BACKSLOPE SWALE AND INTERCEPTOR STRUCTURE ELEVATIONS AND LOCATIONS SHOWN ON THE PLANS ARE APPROXIMATE. FINAL ELEVATIONS AND LOCATIONS SHALL BE FIELD VERIFIED BY THE ENGINEER

PRIOR TO INSTALLATION.

STRUCTURAL CONCRETE WITH #4 BARS (GRADE 60) 12 INCH O.C. EACH WAY, 3 ROWS MIN. EACH WAY.

FOR COLLARS ONLY. WAIT A MINIMUM OF 24 HOURS AFTER PLACING CONCRETE TO BACKFILL.

EPOXY "CLEAN WATER CLEAR CHOICE" LOGO BUTTON ON INTERCEPTORS. LOCATION TO BE DETERMINED

BY THE ENGINEER.

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

a.

b.

c.

d.

e.

a.

b.

c.

C O

N C

R

ET

E C

H

AN

N

EL

L

IN

IN

G

R

EP

AI

R

S- N

O

TH

JOHN C. SMAISTRLA

EXPOSED ABOVE SLOPE

TOP OF TIMBER BENT

3/4" DIA. GALVANIZED

MAX.

6 FT.

REMOVE EXISTING PIPE

10 FT. MIN. INTO SLOPE

ELBOW

COLLAR DETAIL.

A

A

REMOVE EXISTING PIPE

A

A

10 FT. MIN. INTO SLOPE

SEE NOTE 7.

24-INCH TO 42-INCH DIAMETER

FABRICATED

48-INCH AND LARGER DIAMETER

FABRICATED

PIPE ADJUSTMENT DETAIL

PIPE ADJUSTMENT DETAIL

FABRICATED ELBOW

VARIES

PIPE DIA.

F

T.

4 IN. X 8 IN.

SEE NOTE 4.

SEE NOTE 7.

8 IN. DIA. PILE

EXISTING

SEE NOTE 2.

D/2 (TYP.)

D

R O

W

EXISTING PIPE

3 FT. MIN.

R

O W

A

CMP OR HDPE. SEE NOTE 2.

D

A

SLOPE 6 IN.

20 FT. (MIN.)

D/

1D 1D

4D 2D

PLAN

CL

CHANNEL

BOTTOM

12O°

1 FT.

MAINTENANCE BERM

SEE NOTE 7.

6D OR TOP OF

PIPE ELEVATION ON

OPPOSITE BANK,

WHICHEVER IS SMALLER.

SEE NOTE 9.

TIMBER BENT FOR OUTFALLS

48 IN. DIA. AND LARGER. SEE

TIMBER BENT DETAIL. SEE NOTE 4.

SEE NOTES

1 & 6.

TYPICAL STORM SEWER OUTFALL

TIMBER BENT FOR OUTFALLS 48 IN. DIA.

AND LARGER. SEE NOTE 4 AND

TIMBER BENT DETAIL.

STRUCTURE LAYOUT

SECTION

MANHOLE

SEE NOTE 6.

36-INCH HDPE AND LARGER OUTFALLS

MIN. INTO SLOPE

5 FT.

CMP BAND

TYPICAL SECTION ELEVATION

BOLTS WITH OVERSIZE

GALVANIZED

BOLT

SLOPE 6 IN.

20 FT. (MIN.)

SLOPE 6 IN.

MANHOLE

EXISTING PIPE

EXISTING PIPE

SEE TYPICAL CONCRETE

CONCRETE

COLLAR DETAIL

SEE TYPICAL

8 IN. DIA. PILE

ABOVE PIPE

CMP SEE NOTE 2.

SEE NOTE 3.

TYPICAL RIPRAP LINING DETAIL-SIDE SLOPE ONLY

TYPICAL RIPRAP AT CONCRETE CHANNEL LINING

C

SECTION

PLAN

CC

FT.

SECTION

SECTION

SECTION

6 IN.

IN

A

SEE NOTE 3.

NOTE:

TOE-IN RIPRAP

ACROSS CHANNEL

BOTTOM & UP

SLOPE. DO NOT PLACE TOE

AGAINST CONCRETE.

PIPE

TIMBER BENT FOR OUTFALLS 48 IN.

DIA. AND LARGER. SEE TIMBER

BENT DETAIL.

IN.

CMP OR HDPE

TIMBER

4 IN. X 12 IN.

TIMBER

SEE NOTE 6.

C CHANNELL

ELBOW

CMP OR HDPE

SEE NOTE 2.

20 FT. (MIN.)

SEE NOTE 6.

NOTE:

T (MAT THICKNESS)

BEDDING RCP

& CMP DETAIL

M

IN

B

SECTION

SEE NOTE 7.

SEE NOTE 3.

SEE NOTE 3.

SEE NOTE 3.

SEE NOTE 6.

SEE NOTE 6.

TOPSOIL OVER RIPRAP

TOPSOIL OVER RIPRAP

CONCRETE

MIN.

BAND

COUPLER

2 FT. MIN.

SEE NOTE 3.

C CHANNELL

COUPLER DETAIL

PR

EP

AR

ED

: K N

AP

PR

O

VE

D : J

C S

C H

EC

KE

D : D

H K

D

ES

C R

IP

TI

O N

R

EV

AP

PR

D

AT

E

SHEET NUMBER

9900 Northwest Freeway Houston, Texas 77092

SCALE: NTS

OF

DATE: OCTOBER 2025

2-2/3" X 1/2" CORRUGATION 3" X 1" & 5" X 1" CORRUGATION

PIPE

(in.)

MIN. SHEET THICKNESS

(in.) (in.)gage (mm)

24 12 16 .064 1.63

MINIMUM DEPTH OF COVER ABOVE TOP OF PIPE,

MAXIMUM DEPTH OF COVER ABOVE TOP OF PIPE IS 20 FEET.

1.63 1.63 1.63 1.63 2.01 2.77 2.77 3.51 4.27 4.27

.064

.064

.064

.064

.079

.109

.109

.138

.168

.168

.064

.064

.064

.064

.064

.064

.064

.079

.079

.079

1.63 1.63 1.63 1.63 1.63 1.63 1.63 2.01 2.01 2.01

*MIN. SHEET THICKNESS

(in.) (in.)gage (mm)

*DIA. FILL FILL

CORRUGATED GALVANIZED STEEL PIPE (TYPE I)

C CHANNELL

BOTTOM WIDTH

BW > 60 FT AT TOE OF SLOPE *

AT TOE OF SLOPE *

1 FOOT ABOVE FLOWLINE *

PIPE OUTLET INVERT

PIPE OUTFALL IN CHANNELS

WASHERS, BOTH SIDES

TIMBER BENT DETAIL FOR 48-INCH CMP;

CEMENT STABILIZED SAND

ALL AROUND

30° - OUTFALL

DETENTION BASIN

TO CHANNEL

0° - OUTFALL TO

1/

U P

SL

O

PE

M

IN

FT

T

T

T

2 T

T

1/

U P

SL

O

PE

M

IN

FT

T

T

2 T

T

T

T

1/

U P

SL

O

PE

M

IN

FT

1/

U P

SL

O

PE

M

IN

FT

20 MIN.

T

T

T

8 MIN.

18" MIN. GRADE 1

24" MIN. GRADE 2

T

FT.20 MIN.

6 FEET ≤ BW ≤ 20 FT

20 FEET < BW ≤ 60 FT

A

A

* OR 1 FOOT ABOVE NORMAL

WATER LEVEL, WHICHEVER IS

HIGHER

2 FT.

MIN

1 FT. MIN. OF RIPRAP

B

B

BEND COUPLER

5 21

NOTES:

ALL AROUND PIPE SEE NOTE 3.

PIPE DETAIL

CEMENT STABILIZED SAND

IN

1.5 O.D + 12 IN. MIN.

COUPLER DETAIL

THERMOPLASTIC PIPE

INSTALL RIPRAP EROSION PROTECTION IN GRASS LINED CHANNELS AND DETENTION BASINS FOR

ANY SIZE STORM SEWER PIPE AND TREATMENT PLANT OUTFALL, DIMENSIONED AS SHOWN IN

"TYPICAL STORM SEWER OUTFALL STRUCTURE LAYOUT."

STORM SEWER OUTFALL PIPES WITHIN THE HCFCD RIGHT-OF-WAY SHALL BE CMP IN ACCORDANCE WITH SPECIFICATION SECTION 02642-CORRUGATED METAL PIPE, OR APPROVED EQUAL. USE TABLE

BELOW FOR CORRUGATED GALVANIZED STEEL PIPE. - WHEN CALLED FOR BY THE ENGINEER IN

PLAN VIEW, STORM SEWER OUTFALL PIPES WITHIN HCFCD RIGHT-OF-WAY MAY ALSO BE

FABRICATED FROM THERMOPLASTIC MATERIAL, AND SHALL BE IN ACCORDANCE WITH

SPECIFICATION 2505 - HIGH DENSITY POLYETHYLENE PIPE, OR SPECIFICATION 2510 -

POLYPROPYLENE PIPE.

PROVIDE AND PLACE CEMENT STABILIZED SAND IN ACCORDANCE WITH SPECIFICATION SECTION

NO. 02321-CEMENT STABILIZED SAND.

TIMBER BENTS SHALL BE IN ACCORDANCE WITH SPECIFICATION SECTION 02464-TIMBER BENTS.

EXCAVATION, FILL, AND BACKFILL FOR STORM SEWER OUTFALLS SHALL BE IN ACCORDANCE WITH

SPECIFICATION SECTION 02316- STRUCTURAL EXCAVATING AND BACKFILLING.

RIPRAP SHALL BE PLACED IN ACCORDANCE WITH SPECIFICATION SECTION 02378-RIPRAP AND

GRANULAR FILL. FILL RIPRAP VOIDS AND BURY RIPRAP A MINIMUM OF 6 INCHES WITH TOPSOIL ON

SIDE SLOPE AS DIRECTED BY THE ENGINEER.

IN DETENTION BASINS, SET FLOWLINE OF OUTFALL AT TOE OF THE SLOPE OR FLOWLINE OF PILOT CHANNEL. IN CHANNEL, USE ELEVATION INDICATED IN THE PIPE OUTFALL IN CHANNELS TABLE.

STRUCTURAL CONCRETE #4 BARS (GRADE 40) 12 INCH O.C. EACH WAY - FOR COLLARS ONLY. WAIT

A MINIMUM OF 24 HOURS AFTER PLACING CONCRETE TO BACKFILL.

FOR RCP OUTFALL IN GRASS LINED CHANNELS AND DETENTION BASINS, USE HEADWALL/

WINGWALL/APRON DETAIL ON SHEETS 19-25 AS CALLED OUT IN PLANS. FOR RCP OUTFALL IN

CONCRETE LINED CHANNEL AND DETENTION BASINS , SEE HCFCD CONCRETE CHANNEL LINING

DETAILS.

1.

2.

3.

4.

5.

6.

7.

8.

9.

APPROVED THERMOPLASTIC

PIPE.

SEE NOTE 3.

USE BELL & SPIGOT

JOINT SOIL AND WATER

TIGHT

INTO SLOPE

5 FT. MIN.

IN

M

IN

BEDDING

THERMOPLASTIC

ST

O

R M

S

EW

ER

A

N D

R

IP

R

AP

D

ET

AI

LS

H C

FC

D

P R

O

JE

C T

ID

Z1

-0 0-

-X

ST

ATE OF TEXAS

PROFESS IONAL ENGIN

EE

RL I CENSED

10/07/2025

EXISTING

SEE NOTE 8.

12 IN. THICK ALL

AROUND (TYP.)

1/2 IN.

2'-0"

NEW PIPE

EXISTING PIPE

IN

SEE NOTE 8.

IN

.WRAP JOINT WITH

30# X 12 IN.

ASPHALT FELT.

2'-0"

PIPE

(CMP, RCP, OR MAX.

FOR 48" - 60" PIPES

CONCRETE COLLAR DETAIL

HDPE)12 IN.

FELT

EXISTING

SEE NOTE 8.

12 IN. THICK ALL

AROUND (TYP.)

1/2 IN.

3'-0"

NEW PIPE

EXISTING PIPE

IN

SEE

NOTE 8.

IN

WRAP

JOINT

WITH 30#

X 12 IN.

ASPHALT

FELT.

3'-0"

PIPE

(CMP, RCP, OR MAX.

FOR 66" - 90" PIPES

CONCRETE COLLAR DETAIL

HDPE)12 IN.

FELT

C O

N C

R

ET

E C

H

AN

N

EL

L

IN

IN

G

R

EP

AI

R

S- N

O

C O

N C

R

ET

E C

H

AN

N

EL

L

IN

IN

G

D

ET

AI

LS

D

ES

C R

IP

TI

O N

R

EV

D

AT

E

AP

PR

OF

SCALE: NTS

SHEET NUMBER

PR

EP

AR

ED

: K N

AP

PR

O

VE

D : J

C S

C H

EC

KE

D : D

H K

Houston, Texas 77092 9900 Northwest Freeway

DATE: OCTOBER 2025

S:

\O pe ra tio ns

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6 21

8 MIN. IN

SIEVE NO.

SIEVE NO.

1/4 IN

MAX. OPENMIN. OPEN

b.

WEIGHT

MAX. AOS

MIN. AOS

d.

1/8 IN

c.

NO. 8

NO. 4

3/8 IN

3/4 IN

1 IN

PIPE: 4 INCH DIA. SCH. 40 PVC

MATERIALS:

WEEP HOLE NOTES:

DRAIN GRAVEL: SIEVE SIZE FINER

HARDWARE CLOTH:

FILTER FABRIC:

CONCRETE LINING

STAIR DETAIL

GRADE BEAM DETAIL

(SEE NOTE 6)

PIPE OUTFALL DETAILS

(FOR RCP OUTFALLS 42 INCH DIA. AND LESS)

RISER

TREAD

TOE OF SLOPEPLAN

O.C. (EACH LAYER)

WEEP HOLE

LINING. (SEE TYP. CHANNEL

TYPICAL TRAPEZOIDAL CHANNEL LINING

TOP OF CHANNEL LINING

STAIRS TO BE INSTALLED

AT LOCATIONS SHOWN

ON PLANS.

TOEWALL AT UPSTREAM AND

DOWNSTREAM ENDS OF

LINING. (SEE TYP. CHANNEL

LINING DETAIL).

TOEWALL AT TOP OF CHANNEL

GRADE BEAM-SEE DETAIL

BO

TT

O M

W

ID

TH

TYPE "B"

PLAN

REINF. STEEL

SYMMETRICAL

CL

WEEP HOLE DETAILS

SECTION

CONCRETE CHANNEL

BOTTOM

SEAL SLAB

SEE NOTE 5.

8.

7.

4 FT. MIN.

1.

2.

3.

4.

5.

6.

FT

DRAIN GRAVEL

FT

3 FT.

IN

15 # ROOFING FELT

PLAN

FT

DRAIN GRAVEL

4 IN.

1 FT.

FT

.4 IN. DIA. PVC

SECTION

1 FT.

FILTER FABRIC

TYPE "B" WEEP HOLE

SECTION

FILTER FABRIC

IN

FT

DRAIN GRAVEL

1 FT. 2 FT. 1 FT.

C

3 FT.

FT

IN

1 FT. 1 FT.

DRAIN GRAVEL

FILTER FABRIC

TYPE "A" WEEP HOLE

SECTION

CONC. CHANNEL

SEAL SLAB

ABOUT

A

A

15 # ROOFING FELT

15 # ROOFING FELT

TYPE "C" WEEP HOLE

L

1.

a.

SEE NOTE 12

ALL AROUND

1 FT.

2. CUT WEEP HOLE PIPE FLUSH WITH CONCRETE SURFACE.

THICKENED AREA

EXTENT OF

NOTES:

CL

15 FT.

TOP OF CHANNEL LINING

IN.

IN.

2 FEET

LINING DETAIL.)

4 IN. DIA. PVC

12 INCHES #4 BARS

OZ/SY

3. TYPE "A" AND "C" WEEP HOLES FOR TYPICAL RECTANGULAR

CONCRETE CHANNEL LINING. TO BE STAGGERED.

TY

P.

SEE NOTE 9.

15 # ROOFING FELT

6 IN. 6 IN.

100 MIN

70 MAX

6 0Z. MIN

TYPICAL CHANNEL LINING DETAIL

2 FT.

1 AND 2.

SEE NOTES

TYPE "B" WEEP HOLE.

MID-SLOPE LINING

PILOT CHANNEL

(SEE TABLE

ONE BELOW)

OPTIONAL

BOTTOM WIDTH

IN

KEYED JOINT.

1 FT.

1 AND 2.

A

SEE NOTES

HALF SECTION

IN

INCHES SEE TYP.

DETAIL A

SEE DETAIL A.

CHANNEL LINING DETAIL.

TOP OF BANK LINING

M

ATCH LINE "A"

CHANNEL LINING HALF SECTION

TYPICAL RECTANGULAR CONCRETE

M

ATCH LINE "A"

0 - 60

20 - 90 70 - 100

9.

SEE WEEP HOLE DETAILS.

TOEWALL UPSTREAM

& DOWNSTREAM.

TRIM PIPE FLUSH

WITH CHANNEL

LINING AS DIRECTED

BY THE ENGINEER 10.

SEE NOTE 10.

STRUCTURAL CONCRETE FOR CONCRETE CHANNEL LINING AND NONSTRUCTURAL CONCRETE FOR SEAL SLAB SHALL BE IN

ACCORDANCE WITH SPECIFICATION SECTION NO. 03310-CONCRETE.

REINFORCING STEEL SHALL BE IN ACCORDANCE WITH SPECIFICATION SECTION NO. 03310-CONCRETE.

EXCAVATION AND BACKFILL FOR CONCRETE CHANNEL LINING SHALL BE IN ACCORDANCE WITH SPECIFICATION SECTION NO.

02316-STRUCTURAL EXCAVATING AND BACKFILLING.

RIPRAP SHALL BE IN ACCORDANCE WITH SPECIFICATION SECTION NO. 02378-RIPRAP AND GRANULAR FILL.

A NON-REINFORCED 4 INCH MINIMUM NONSTRUCTURAL CONCRETE SEAL SLAB IS REQUIRED BENEATH THE BOTTOM OF

CONCRETE CHANNELS.

STRUCTURAL CONCRETE GRADE BEAMS SHALL BE INSTALLED TRANSVERSELY AT 20 FOOT MAX. CENTERS ON CONCRETE

LINED CHANNELS WITH BOTTOM WIDTHS EQUAL TO OR GREATER THAN 20 FEET.

JOINTS:

A. PLACE CONSTRUCTION JOINT IN CONCRETE LOW-FLOW, TRAPEZOIDAL BOTTOM SECTIONS AND SLOPES AT 20 FOOT

MIN., SPACING CONTINUOUSLY THROUGH CHANNEL LINING.

B. PLACE EXPANSION JOINT IN CONCRETE LOW-FLOW, TRAPEZOIDAL BOTTOM SECTIONS, AND SLOPES AT 60 FOOT MAX.

SPACING CONTINUOUSLY THROUGH CHANNEL LINING.

CEMENT STABILIZED SAND SHALL BE PROVIDED AND PLACED IN ACCORDANCE WITH SPECIFICATION SECTION NO. 02321

-CEMENT STABILIZED SAND.

DELETE 2 FT FLAT EDGE WHEN LINING IS BELOW TOP OF BANK. SEE MID-SLOPE LINING DETAIL.

UPSTREAM AND DOWNSTREAM TOE WALL 3 FOOT MIN. DEPTH AT BOTTOM OF SLOPE AND 8 INCHES THICK.

MINIMUM #4 BARS (GRADE 60) AT 12 INCHES ON CENTER EACH WAY.

VARIES BASED ON SIDE SLOPE. MINIMUM 1 FOOT VERTICAL AT TOE OF SLOPE.

FOR RCP OUTFALLS 48 INCHES DIA. AND LARGER, USE HEADWALL/WINGWALL DETAIL AS CALLED FOR ON PLANS.

(TYP.)

C CHANNELL

FT

1 FT.

15 # ROOFING FELT

CLOTH

HARDWARE

CLOTH

HARDWARE

HARDWARE CLOTH W/HARDWARE CLOTH

4 IN. PVC PIPE

OVER END.

NON-WOVEN GEOTEXTILE

11.

FT

TYPE B WEEP HOLE.

TYPE A WEEP HOLE.

SEE WEEP HOLE DETAILS.

SEE WEEP HOLE DETAILS.

4 IN. DIA. PVC PIPE

IN

IN

IN

IN

CL

SECTION

IN

IN

IN

IN

IN

4 IN. DIA.

IN

ELEVATION

APPLY CONST. ADHESIVE

TO FILTER FABRIC TOP &

BOTTOM CONTINUOUSLY

PVC PIPE

12 IN.6

IN

C

SEE NOTE 5.

SEAL SLAB

CHANNEL

BOTTOM WIDTH

PILOT CHANNEL

(SEE TABLE ABOVE)

L

BOTTOM WIDTH

BW < 12 FT

BW = 12 FT - 20 FT

BW > 20 FT 8 FT

6 FT

FLAT BOTTOM

PILOT CHANNEL WIDTH

FT

OPTIONAL

KEYED JOINT.

SEE DETAIL B.

M

ATCH LINE "A"

IN. SEE TYP.

CHANNEL LINING DETAIL.

TYPE B WEEP HOLE

AT 15 FT. O.C.

SEE WEEP HOLE

DETAILS.

TYPE C WEEP HOLE

AT 15 FEET O.C. SEE

WEEP HOLE DETAILS.

DETAIL B

12.

TRIM PVC FLUSH

TO FINISH CONCRETE

SEE STORM SEWER &

RIPRAP DETAIL SHEET

GEOTEXTILE TYP.

FT.3 MIN

TYPE "A"

WEEP HOLE (TYP.)

15 FT.

EX

IS

TI

N

G

8 IN X 3 FT MIN

M

IN

5 MIN

8 MIN. IN.

SEAL SLAB

SEE NOTE 5.

SPECIFY REINFORCING

STEEL, SEE NOTE 11. 2 FT.

3 FT.

SPECIFY REINFORCING

STEEL, SEE NOTE 11.

5 MIN

FT

VARIES

IN

IN.

TYPE A WEEP HOLE

AT 15 FEET O.C.

SEE WEEP HOLE DETAILS.

8 IN X 2 FT MIN

THICKNESS 5 MIN IN.

FT

M

IN

FT

M

IN

REINFORCING STEEL,

SEE NOTE 11.

1 FT-6 IN. MIN.

FT.1 MIN

SPECIFY REINFORCING

STEEL, SEE NOTE 11.

SPECIFY REINFORCING

STEEL, SEE NOTE 11.

M

IN

FT.4 MIN.

FT.4 MIN.

IN.5 MIN.

IN.8 MIN.

FT

M

IN

FT

M

IN

IN.8 MIN.

SPECIFY REINFORCING

STEEL, SEE NOTE 11.

M

ATCH LINE "A"

2 M

IN. FT.

TOEWALL UPSTREAM

& DOWNSTREAM

1 AND 2.

SEE NOTES

5 MIN. IN.

FT

M

IN

12" MIN.

CONNECTION TO EXISTING CONCRETE

EXIST. STEEL

EMBEDMENT DEPTHNEW #5 IN CENTER

OF CONC. LINING

(TYP)

INSTALL NEW REINFORCED CONCRETE LINING

REMOVE EXISTING CONCRETE AND REBAR &

EXISTING CONCRETE

SAWCUT

FULL DEPTH

DRILL EXISTING CONCRETE AND EPOXY GROUT IN PLACE 24" LONG #5 REBAR DOWELS @

18" O.C.; EMBEDMENT DEPTH SHALL BE AS PER EPOXY MANUFACTURER TO FULLY

DEVELOP THE SIZE/GRADE REBAR. CONTRACTOR TO SUBMIT MANUFACTURER'S PRODUCT

DATA FOR EPOXY GROUT PER SPECIFICATION SECTION No. 01330.

1'-0"

6"

10"

45°

USE #8 X 12" DOWELS @ 18" O.C. WITH 6" EMBEDMENT AND NO EPOXY @ EXPANSION JOINTS.* USE EXPANSION JOINTS IN LIEU OF CONSTRUCTION JOINTS WHERE DIRECTED BY ENGINEER.*

5 MIN. IN.

TOP OF CHANNEL

LINING

WHEN PLACING THROUGH EXISTING

CHANNEL LINING, SAW-CUT FULL

DEPTH AND REMOVE 4 FEET ALL

AROUND.

SPECIFY REINFORCING

STEEL, SEE NOTE 11.

8 MIN

6 INCH

MIN

TYP.6 IN.

2 IN.

5 IN.

8 IN.

13.

BAR SIZE #

LAP - SPLICE -

1 FT. 9 IN.

2 FT. 2 IN.

2 FT. 7 IN.

3 FT. 5 IN.

4 FT. 6 IN.

5 FT. 8 IN.

7 FT. 3 IN.

MINIMUM

LENGTHS

6 INCH

SEE NOTE 8.

FOR STRUCTURAL BACKFILL MATERIAL PER SPECIFICATION SECTION 2316, USE CONCRETE COARSE AGGREGATE ASTM C33

SIZE NO. 467. LIMESTONE AND RECYCLED CONCRETE NOT ALLOWED.

CONCRETE CHANNEL LINING PLACED ON CHANNEL OR BASIN SIDE SLOPES MAY BE 5 INCHES OR 6 INCHES IN THICKNESS. THE IFC PLAN SETS FOR EACH SPECIFIC PROJECT SITE WILL CALL OUT THE THICKNESS FOR THAT SPECIFIC PROJECT SITE.

CONCRETE CHANNEL LINING PLACED IN CHANNEL OR BASIN BOTTOMS MAY BE 8 INCHES, 10 INCHES OR 12 INCHES IN THICKNESS. THE IFC PLAN SETS FOR EACH SPECIFIC PROJECT SITE WILL CALL OUT THE THICKNESS FOR THAT SPECIFIC

PROJECT SITE.

14.

IN.8 MIN

PIPE OUTFALL DETAIL

(FOR RCP OUTFALLS 42 INCH DIA. AND LESS)

SEE NOTE 14.

SEE NOTE 14

EXISTING

EXISTING

MATCH

EXISTING

MATCH

EXISTING

MATCH

EXISTING

MATCH

15.

16.

#15

SEE NOTE

#16

SEE NOTE

CONTINUOUS DRAINAGE

GEOCOMPOSITE WITH 8 OZ.

NON-WOVEN GEOTEXTILE.

H C

FC

D

P R

O

JE

C T

ID

Z1

-0 0-

-X

CONTINUOUS STEEL

6 IN.

1 FT. FILTER FABRIC

SEE WEEPHOLE

NOTE d.

CONSTRUCTION JOINT

3/4 IN. BITUMINOUS

CENTER DOWEL HORIZONTALLY ON JOINT.

EXPANSION JOINT BARS SHALL BE HELD PARALLEL TO THE FINISHED

1.

2.

CONCRETE THICKNESS (D) DOWEL DIA.

5" - 6" 3/4" 7" - 8" 1"

9" AND UP 1 1/4"

SMOOTH EXPANSION JOINT DOWELS

CONCRETE SURFACE.

SMOOTH BAR

9"

D /2

D /2

DOWEL TYPE EXPANSION JOINT

DOWEL AT

12" C-C

HEAVY PLASTIC

OR STEEL TUBE

3/4" GAP

(ALLOWS DOWEL

BAR TO MOVE)

9" 18"

D

FILTER FABRIC. SEE

WEEP HOLE NOTE d.

9 3/4"

EXPANSION

BOARD

1 FT.

BITUMINOUS

EXPANSION

BOARD

3/4 IN.

6"

THE EXTENT OF THICKENED AREA AROUND PIPE OUTFALLS WILL BE PAID AS THE SPECIFIED CHANNEL LINING THICKNESS FOR

THE ADJACENT CHANNEL LINING.

17.

SEE NOTE 17.

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PIPE OUTFALL DETAILS

ASTM A-36, PLACED AT

20 DEGREE INTERVALS

TOE OF SLOPE

PLAN

O.C. (EACH LAYER)

J" BOLTS, OR EQUIVALENT,

AND WASHERS ON

2 GALVANIZED NUTS

REINF. STEEL

SYMMETRICAL

CL

SECTION

4 FT. MIN.ABOUT

VARIES BASED ON

ALL AROUND

THICKENED AREA

EXTENT OF

THROUGH PIPE.

1 FOOT VERTICAL

EACH 1/2 X 6 IN.

CL

AT TOE OF SLOPE.

LINING, SAW-CUT 1 INCH AND REMOVE 4 FEET

WHEN PLACING THROUGH EXISTING CHANNEL1.

PIPE OUTFALL NOTES FOR EXISTING CHANNEL LINING

12 INCHES#4 BARS

EXPOSE A MIN. OF 18 INCHES OF STEEL.2.

ALL AROUND.

TY

P.

SIDE SLOPE, MIN.4

M

IN

F

T.

4 MIN FT.

M

IN

F T.

4 MIN FT.

8 MIN IN.

TRIM PIPE FLUSH

WITH CHANNEL

LINING

TYP

20°

(FOR CMP OUTFALLS GREATER THAN 42 INCH DIA.)

PIPE OUTFALL DETAILS

(FOR CMP OUTFALLS 24-42 INCH DIA.)

ASTM A-36, PLACED AT

TYP

30 DEGREE INTERVALS

30°

TOE OF SLOPE

PLAN

O.C. (EACH LAYER)

J" BOLTS, OR EQUIVALENT,

AND WASHERS ON

2 GALVANIZED NUTS

REINF. STEEL

SYMMETRICAL

CL

SECTION

4 FT. MIN.ABOUT

VARIES BASED ON

ALL AROUND

THICKENED AREA

EXTENT OF

THROUGH PIPE.

1 FOOT VERTICAL

EACH 1/2 X 6 IN.

CL

AT TOE OF SLOPE.

LINING, SAW-CUT 1 INCH AND REMOVE 4 FEET

WHEN PLACING THROUGH EXISTING CHANNEL1.

PIPE OUTFALL NOTES FOR EXISTING CHANNEL LINING

12 INCHES#4 BARS

EXPOSE A MIN. OF 18 INCHES OF STEEL.2.

ALL AROUND.

TY

P.

SIDE SLOPE, MIN.4

M

IN

F

T.

4 MIN FT.

M

IN

F

T.

4 MIN FT.

8 MIN IN.

TRIM PIPE FLUSH

WITH CHANNEL

LINING

REINFORCING STEEL #4 AT 12

INCH C.C. MINIMUM OR

EQUIVALENT WELDED WIRE

FABRIC.

REINFORCING STEEL #4 AT 12

INCH C.C. MINIMUM OR

EQUIVALENT WELDED WIRE

FABRIC.

REINFORCING STEEL #4 AT 12

INCH C.C. MINIMUM OR

EQUIVALENT WELDED WIRE

FABRIC.

REINFORCING STEEL #4 AT 12

INCH C.C. MINIMUM OR

EQUIVALENT WELDED WIRE

FABRIC.

CEMENT STABILIZED SAND

SHALL BE PROVIDED AND

PLACED IN ACCORDANCE WITH

SPECIFICATION SECTION

NO. 02321-CEMENT STABILIZED

SAND.

CEMENT STABILIZED SAND

SHALL BE PROVIDED AND

PLACED IN ACCORDANCE WITH

SPECIFICATION SECTION

NO. 02321-CEMENT STABILIZED

SAND.

NOTE:

THE EXTENT OF THICKENED AREA AROUND

PIPE OUTFALLS WILL BE PAID AS THE

SPECIFIED CHANNEL LINING THICKNESS FOR

THE ADJACENT CHANNEL LINING.

NOTE:

THE EXTENT OF THICKENED AREA AROUND PIPE

OUTFALLS WILL BE PAID AS THE SPECIFIED

CHANNEL LINING THICKNESS FOR THE

ADJACENT CHANNEL LINING.

PIPE OUTFALL DETAILS

(FOR RCP 42"-72" DIAMETER OUTFALLS)

TOE OF SLOPEPLAN

O.C. (EACH LAYER)

REINF. STEEL

SYMMETRICAL

CL

SECTION

4 FT. MIN.

ABOUT

ALL AROUND

THICKENED AREA

EXTENT OF

CL

12 INCHES #5 BARS

TY

P.

FT

M

IN

FT

M

IN

FT.5 MIN.

FT.5 MIN.

MIN.10 IN.

TYP.

TRIM PIPE FLUSH

WITH CHANNEL

LINING

VARIES BASED ON

1 FOOT VERTICAL

AT TOE OF SLOPE.

SIDE SLOPE, MIN.

MINIMUM #5 BARS (GRADE

60) AT 12 INCHES ON

CENTER EACH WAY.

CEMENT STABILIZED SAND

SHALL BE PROVIDED AND

PLACED IN ACCORDANCE WITH

SPECIFICATION SECTION

NO. 02321-CEMENT STABILIZED

SAND.

LINING, SAW-CUT 1 INCH AND REMOVE 5 FEET

WHEN PLACING THROUGH EXISTING CHANNEL1.

PIPE OUTFALL NOTES FOR EXISTING CHANNEL LINING

EXPOSE A MIN. OF 18 INCHES OF STEEL.2.

ALL AROUND.

NOTE:

THE EXTENT OF THICKENED AREA AROUND PIPE

OUTFALLS WILL BE PAID AS THE SPECIFIED

CHANNEL LINING THICKNESS FOR THE

ADJACENT CHANNEL LINING.FT

M

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DATE: OCTOBER 2025

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JOHN C. SMAISTRLA

SHEET NUMBER

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SECTION "A-A"

N.T.S.

20' BOTTOM

EXISTING TOP OF BANK

EXISTING TOP OF BANK

B B

PROP. SLOPE PAVING W/ #4 BARS

@ 12" O.C. EACH WAY, DOUBLE

MAT

NOTES:

1. STUDS SHALL BE ELECTRIC ARC

END-WELDED TO THE SHEET PILING

WITH COMPLETE FUSION.

EXISTING FACE OF STEEL

SHEET PILE WALL (SEE

DETAIL A)

PROP. 7/8"Ø STUDS

W/HEADS (TYP.)

6 #5 CONT. W/ #4

CLOSED STIRRUPS @

12" O.C. (TYP.)

DETAIL "A"

N.T.S.

EXISTING CHANNEL

LINING

PROP. 7/8"Ø STUDS

W/HEADS (TYP.)

PLAN

N.T.S.

EXISTING SHEET

PILE WALL

PROP. SLOPE PAVING W/ #4 BARS

@ 12" O.C. EACH WAY, DOUBLE

MAT

6 #5 CONT. W/ #4

CLOSED STIRRUPS @

12" O.C. (TYP.)

6 #5 CONT. W/ #4

CLOSED STIRRUPS @

12" O.C. (TYP.)

6"

3" C

LR

.1'3"CLR.

2' 8"

SECTION "B-B"

N.T.S.

PROP. SLOPE PAVING W/ #4 BARS

@ 12" O.C. EACH WAY, DOUBLE

MAT

EXISTING PROPOSED

DETAIL "A"

A A PROP. 7/8"Ø STUDS

W/HEADS (TYP.)

NOTES:

1. STUDS SHALL BE ELECTRIC ARC

END-WELDED TO THE SHEET PILING

WITH COMPLETE FUSION. PAYMENT IS

INCIDENTAL TO UNIT ITEM SECTION 02376,

CONCRETE CHANNEL LINING.

NOTED

OTHERWISE

12" UNLESS

6"

EXISTING FACE OF STEEL

SHEET PILE WALL (SEE

DETAIL A)

EXISTING FACE

OF STEEL SHEET

PILE WALL (SEE

DETAIL A)

Houston, Texas 77092 9900 Northwest Freeway

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Houston, Texas 77092 9900 Northwest Freeway

EXISTING

CONCRETE

SLOPE

PAVING

PROPOSED SLOPE PAVING TO

BE FULL DEPTH SAWCUT, REMOVED AND

DISPOSED OF.

AA

B

PLAN VIEW

1.

2.

3.

4.

5.

6.

GENERAL NOTES:

STRUCTURAL CONCRETE FOR CONCRETE CHANNEL LINING AND NONSTRUCTURAL CONCRETE FOR SEAL SLAB

SHALL BE IN ACCORDANCE WITH SPECIFICATION SECTION NO. 03310-CONCRETE.

REINFORCING STEEL SHALL BE IN ACCORDANCE WITH SPECIFICATION SECTION NO. 03310-CONCRETE.

EXCAVATION AND BACKFILL FOR CONCRETE CHANNEL LINING SHALL BE IN ACCORDANCE WITH SPECIFICATION

SECTION NO. 02316-STRUCTURAL EXCAVATING AND BACKFILLLING.

CEMENT STABILIZED SAND SHALL BE PROVIDED AND PLACED IN ACCORDANCE WITH SPECIFICATION SECTION

NO. 02321-CEMENT STABILIZED SAND.

USE #4 REBAR AT 12 INCH O.C. MINIMUM. EQUIVALENT WELDED WIRE FABRIC, WITH APPROVAL BY ENGINEER OR

HIS DESIGNEE.

PAYMENT FOR SAWCUTTING WILL BE INCIDENTAL TO UNIT ITEM 2120-13, REMOVE AND DISPOSE OF CONCRETE

CHANNEL LINING, & LOW FLOW ALL THICKNESS.

AA

B

EXISTING REBAR

#4 BARS @

12" O.C.E.W.

EXISTING CONCRETE

EMBEDMENT2'-0" MIN. LAP

2" CLR.

DEPTH

DRILL EXISTING CONCRETE AND EPOXY GROUT IN

PLACE 1/2" SMOOTH DOWELS @ 8" O.C. EMBEDMENT

DEPTH SHALL BE 8" MINIMUM, OR AS PER EPOXY

MANUFACTURER'S RECOMMENDATION FOR THE

SIZE/GRADE REBAR BEING USED. EPOXY GROUT

SHALL BE HILTI RE500, OR APPROVED EQUAL.

6"

2'-6" MIN.

PROPOSED THICKNESS

VARIES.

FULL DEPTH SAWCUT AT

EXISTING

CONCRETE JOINT.

EXISTING

CONCRETE

SLOPE

PAVING

SECTION B-B

(TYPICAL CONNECTION TO EXISTING CONCRETE)

EXISTING REBAR

EXISTING CONCRETE

SLOPE PAVING

FULL DEPTH SAWCUT, REMOVE AND DISPOSE OF EXISTING

CONCRETE CHANNEL LINING.

#4 BARS @

12" O.C.E.W.

6"

3'-0" MIN.

PROPOSED THICKNESS

VARIES.

DRILL EXISTING CONCRETE AND EPOXY GROUT IN PLACE 1/2 "

SMOOTH DOWELS @ 8" O.C. EMBEDMENT DEPTH SHALL BE 8"

MINIMUM, OR AS PER EPOXY MANUFACTURER'S

RECOMMENDATION FOR THE SIZE/GRADE REBAR BEING USED.

EPOXY GROUT SHALL BE HILTI RE500, OR APPROVED EQUAL.

SECTION A-A

CONCRETE TIE-IN DETAIL

EXPANSION JOINT.

(ONE SIDE ONLY.)

BOND

BREAKER

TI

E-

IN

D

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AI

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#4 BARS @

12" O.C.E.W.

EXISTING CONC.REMOVE CONC. & NEW CONC.

2" CLR.

6"

2'-6" MIN.

PROPOSED THICKNESS

VARIES.

FULL DEPTH SAWCUT

SECTION A-A

EXPANSION JOINT.

(ONE SIDE ONLY.)

BOND

BREAKER

6"

6"

REMOVE & DISPOSE EXISTING

CONCRETE AND REBAR &

INSTALL NEW REINFORCED

CONCRETE LINING.

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92905

FULL DEPTH

SAWCUT

ST

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PROFESS IONAL ENGIN

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10/07/2025

SECTION B-B

(TYPICAL CONNECTION TO EXISTING SEAL SLAB)

EXISTING REBAR

#4 BARS @

12" O.C.E.W.

PROPOSED

THICKNESS

VARIES.

12"

18"

2'

12"

12"12"

12"

6"

6" EXISTING

CONCRETE

SLOPE

PAVING

EXISTING SEAL

SLAB

12"

C O

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6"

SPRING LINE

HALF SECTION

UNDER PAVEMENT

DIA

NATURAL GROUND

3"

3" MIN COVER

HALF SECTION

UNDER NATURAL

GROUND

FILTER FABRIC

(MIN 12" LAP)

PAVEMENT

12"

CEMENT

STABILIZED

SAND

6"

CRUSHED STONE

FOUNDATION SEE

TABLE FOR MINIMUM

DEPTH. ADD DEPTH AS

NEEDED FOR SEEPAGE

DRAINAGE

PIPE SIZE

(IN)

FOUNDATION

DEPTH (IN)

18ALTERNATE TRENCH

BOTTOM TREATMENT

(SEE NOTE 5)

SUBGRADE

42 TO 72

78 AND LARGER

CEMENT STABILIZED

SAND TO WITHIN

1 FOOT BELOW

SUBGRADE

STORM SEWER

PIPE

BACKFILL PER

STANDARD SPECIFICATION

0231512

# 5 @ 16 EW MIN

M

IN

SPRING LINE

HALF SECTION

UNDER PAVEMENT

HALF SECTION UNDER

NATURAL GROUND

NATURAL GROUND

7" 4"

3"# 5 @ 16 EW MIN

3" MIN

12" MIN

(TYP)

SYMMETRICAL

ABOUT

CL

PAVEMENT

SUBGRADE

CRUSHED STONE

FOUNDATION SEE

TABLE FOR MINIMUM

DEPTH. ADD DEPTH AS

NEEDED FOR SEEPAGE

DRAINAGE

6"

ALTERNATE TRENCH

BOTTOM TREATMENT

(SEE NOTE 5)

CEMENT

STABILIZED

SAND

FILTER FABRIC

(MIN 12" LAP)

CEMENT

STABILIZED

SAND

STORM SEWER

CONC CULVERT

STORM SEWER

CONC CULVERT

BACKFILL PER

STANDARD

SPECIFICATION 02315

12" MIN

FOUNDATION

DEPTH (IN)

CULVERT SIZE

(FT)

3' x 2' TO 6' x 6' 6' x 6' AND LARGER

SOIL CONDITIONS EXIST (SEE NOTE 4)

AND LARGER WHERE UNSATISFACTORY

BACKFILL FOR 42" DIAMETER RCP

STORM SEWER BEDDING AND

BEDDING AND BACKFILL FOR PRECAST

STORM SEWER

SOIL CONDITIONS EXIST (SEE NOTE 4)

CONCRETE BOX WHERE UNSATISFACTORY

SPRING LINE

HALF SECTION

UNDER PAVEMENT

HALF SECTION UNDER

NATURAL GROUND

NATURAL GROUND

THAN 42" DIAMETER RCP WHERE

STORM SEWER

6" MIN

OD

SYMMETRICAL

ABOUT

CL

PAVEMENT

12" MIN 12" MIN

SUBGRADE

BEDDING AND BACKFILL FOR LESS

BACKFILL PER

STANDARD

SPECIFICATION12" MIN

6"

SPRING LINE

HALF SECTION

UNDER PAVEMENT

HALF SECTION UNDER

NATURAL GROUND

NATURAL GROUND

OD

STORM SEWER BEDDING AND

BACKFILL FOR 42" DIA RCP AND

LARGER WHERE SATISFACTORY

SOIL CONDITIONS EXIST

PAVEMENT

12"MIN

12"

MIN

SUBGRADE BACKFILL PER

STANDARD

SPECIFICATION

02315

12" MIN

6"

SPRING LINE

BOTTOM OF TRENCH

HALF SECTION

UNDER PAVEMENT

HALF SECTION UNDER

NATURAL GROUND

NATURAL GROUND

CEMENT STABILIZED SAND

CEMENT STABILIZED SAND

STORM SEWER

BEDDING AND BACKFILL FOR PRECAST

CONCRETE BOX WHERE SATISFACTORY

SOIL CONDITIONS EXIST

6" MIN

12" MIN

(TYP)

SYMMETRICAL

ABOUT

CL

PAVEMENT

SUBGRADE

STORM SEWER

CONC CULVERT

BACKFILL PER

STANDARD

SPECIFICATION 0231512" MIN

02315

SATISFACTORY SOIL CONDITIONS EXIST

OUTSIDE TO OUTSIDE BOX SEWER SEPARATION SHALL BE 6".

1. REINFORCED CONCRETE SLAB TO BE POURED IN DRY TRENCH ONLY.

NOTES:

3. WHERE MULTIPLE BOX SEWERS ARE USED IN THE SAME TRENCH, MIN

2. CONCRETE SLAB TO REACH MIN 24 HOURS COMPRESSIVE STRENGTH OF 1,000 PSI

BASED ON MIX DESIGN BEFORE BOX IS LAID.

5. ALTERNATE TRENCH BOTTOM TREATMENT TABLE:

FOUNDATION

DEPTH (IN)

CULVERT SIZE

(FT)

3' x 2' TO 6' x 6'

6' x 6' AND LARGER

4. THIS BEDDING DETAIL TO BE USED FOR ALL LOCATIONS WHERE SOIL

CONDITIONS DO NOT CONFORM TO FOLLOWING REQUIREMENTS:

A. STRATA FROM SPRING LINE (CENTER) TO 3 FT. BELOW THE FLOWLINE

OF THE BOX TO CONSIST OF NON-WATERBEARING COHESIVE SOIL

HAVING A SHEAR STRENGTH OF 1000 PSF OR GREATER.

B. NO WET SAND STRATA TO EXIST IN THE AREA FROM 1 FT. ABOVE THE

TOP OF THE BOX TO 3 FT. BELOW THE FLOW LINE.

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PROPOSED MANHOLES ARE ASSUMED TO BE PRE-CAST OR CAST-IN-PLACE .

BRICK MANHOLE MAY ONLY BE USED WHEN SPECIFIED BY ENGINEER.

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8"8" 3'-0"

9"

CONCRETE SLAB

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# 5 @ 12 EW

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STORM SEWER

TYPE "E" INLET

3" CLR

SECTION

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B B

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# 4 3'-6" LONG

# 5

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# 5 X 18" @ 6

32" STANDARD MANHOLE

FRAME AND COVER

SHEET NUMBER

DATE: OCTOBER 2025

9900 Northwest Freeway Houston, Texas 77092

SCALE: NTS

OF17 21

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THIS SHEET PROVIDES SAMPLE CONTENT FROM PRIOR

HCFCD MAINTENANCE ENGINEERING PROJECTS. HCFCD

STANDARD DETAIL SHEETS ARE LOCATED IN APPENDIX D

OF THE HCFCD POLICY, CRITERIA AND PROCEDURE

MANUAL.

CONTENT SHALL BE REVISED BY THE DESIGN ENGINEER AS

REQUIRED FOR THE SPECIFIC PROJECT FOR WHICH IT IS

BEING CONSIDERED.

Z1

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NOTES: CONCRETE PAD

1. ADJUST LENGTH AND WIDTH IN FIELD AS NECESSARY.

2. 2' DEEP X 8" WIDE TOE ALL AROUND PERIMETER OF STRUCTURE.

3. STEEL REINFORCING #4 BARS (GRADE 60) AT 12" ON CENTER EACH WAY.

4. MATCH PAD WITH NATURAL GROUND.

5. CONCRETE PAD AROUND TYPE E INLET PAID FOR AS TYPE E INLET STRUCTURE

PER UNIT PRICE SCHEDULE.

6. EPOXY 'CLEAN WATER CLEAR CHOICE' LOGO BUTTON ON PAD. LOCATION TO BE

DETERMINED BY THE ENGINEER.

7. MATERIALS FOR INLET AND PAD PER NOTES-1 THROUGH 4, SHEET 4 OF 20,

INTERCEPTOR STRUCTURE DETAILS.

M

IN

6"

M

IN

5"

M

IN

5"

3 FT.4' 4"

10'- 4" TYP.

1 FT.8 IN.

3 FT.

" T

YP

PLAN

3:1 3:1

1 FT. 8 IN.

IN

IN

SEE NOTE 6

5" THICK CONCRETE

SLAB ON BOTH SIDES

5"

5" CONCRETE

PAD

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PROFESS IONAL ENGIN

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JOHN C. SMAISTRLA

10/07/2025

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SHEET NUMBER

9900 Northwest Freeway Houston, Texas 77092

SCALE: NTS

OF20 21

DATE: OCTOBER 2025

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ST

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JOHN C. SMAISTRLA

92905

10/07/2025

DRAWING NUMBER

OF1 1

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GRANULAR FILL

SEE SPECIFICATION SECTION NO. 02365-STABILIZED CONSTRUCTION ACCESS.

GEOTEXTILE FOR FULL

WIDTH AND LENGTH OF

STABILIZED CONSTRUCTION

CONSTRUCTION NOTES:

1.

STABILIZED CONSTRUCTION ACCESS

SYMBOL

GRADED TO PREVENT

SEDIMENT FROM

PROVIDE APPROPRIATE TRANSITION

BETWEEN STABILIZED CONSTRUCTION

ACCESS AND EDGE OF ROADWAY.

8 INCHES MINIMUM

50 FT. MAX. 50 FT. MAX.

R O

AD

W

AY

1. SEE SPECIFICATION SECTION NO. 02361-SILT FENCES.

REINFORCED SILT FENCE

EXTEND SILT FENCE FABRIC

FLOW

SILT FENCE FABRIC

INTO TRENCH.

SUPPORT

IN

GRID MESH

SYMBOL

RSF

NOTE:

3. ATTACH SILT FENCE FABRIC TO

WIRE FENCE AND EXTEND INTO

THE TRENCH.

4 IN. X 6 IN. TRENCH UPSLOPE

ALONG LINE OF SUPPORTS.

1. SET SUPPORTS AND EXCAVATE

EXCAVATED SOIL.

4. BACKFILL AND COMPACT THE

2. SECURE WIRE FENCING TO SUPPORTS.

OF SLOPE

SLOPE OR NORMAL

SODDING

PROP. TOP OF SLOPE

SOD

PROP. TOP

SOD

FT.

50 FT.

AS NEEDED

BACKSLOPE SWALE

INTERCEPTOR STRUCTURE AND

INLET PROTECTION (SEE DETAIL "D").

TWO ROWS STAGGERED

SOD PANELS (TYP.)

FLOW

PROP. TOE OF

DIAMETER HEXAGONAL OPENINGS.

TYPE 2 AND 3 FILTER DAMS: SECURE WITH 20 GAUGE GALVANIZED WOVEN WIRE MESH WITH 1 INCH

FILTER DAM NOTES:

1.

DOWNSTREAM SIDE USING WIRE TIES OR HOG RINGS.

WIRE MESH: FOLD AT UPSTREAM SIDE OVER GRANULAR FILL AND TIGHTLY SECURE TO ITSELF ON THE3.

IN STREAMS: SECURE OR STAKE MESH TO STREAM BED PRIOR TO AGGREGATE PLACEMENT.4.

5. SEE SPECIFICATION SECTION NO. 02364-FILTER DAMS.

WHERE NO BACKSLOPE SWALE

EXISTS OR FOR PAVED CHANNEL,

SECTION

2 FT. MIN.

IN

.FLOWLINE

C

IN-CHANNEL FILTER DAM

B

FILTER DAM

3 FT.

GRANULAR FILL

DEPRESS CENTER AREA

6 IN.

4 FT.

3 FT.

(SEE NOTE B.1.)

WIRE MESH

DETAIL "A"

PLACE A DOUBLE ROW OF SOD

SECTION

SECTION

B

A SECTION

GRANULAR FILL

TYPES OF FILTER DAMS

TYPE 1 - NOT USED BY HCFCD1.

TYPE 2 (REINFORCED).

TOP WIDTH - 2 FEET (MINIMUM).

HEIGHT - 18-36 INCHES. MEASURE VERTICALLY FROM EXISTING GROUND TO TOP OF FILTER DAM.a.

3.

SLOPES - 2:1 (MAXIMUM).

TYPE 3 - NOT USED BY HCFCD

2.

b.

c.

TYPE 4 (GABION)4.

D C

TOP WIDTH - 2 FEET (MINIMUM).

HEIGHT - 30 INCHES (MINIMUM). MEASURE VERTICALLY FROM EXISTING GROUND TO TOP OF FILTER DAM.a.

b.

TYPE 5. AS SHOWN ON THE PLANS.5.

A.

PLAN SECTION

(SEE NOTE B.1.)

WIRE MESH

WIRE MESH

(SEE NOTE B.1.)

OUTFALL

5 FT. MIN.

NOTES

VA

R

IE

S

W

IT

H T

YP

E

REINFORCED SILT FENCE

6 FT. MAX FOR REINFORCED FENCE.

SPACING CONSTRUCT FILTER DAMS ACCORDING TO THE FOLLOWING CRITERIA UNLESS SHOWN OTHERWISE ON THE PLANS.B.

6.…