7-How991129B_25-08_PLANS.pdf

PDF 2 MB Posted Aug 13, 2025

Attached to: How991129B Nutrient Reduction Wetland
Solicitation number: 009-WRBWL-CY25-08
Issued by: Carroll County, Iowa

About this file

Written by GovTribe AI · Aug 14, 2025

This document is a comprehensive set of engineering plans for a Water Quality Wetland Project prepared by the Iowa Department of Agriculture and Land Stewardship's Division of Soil Conservation and Water Quality. The project is located in Howard County, Section 29, Township 99N, Range 11W, and involves constructing a wetland to improve water quality. The plans include 12 detailed sheets covering site preparation, grading, aluminum toe wall installation, water control structure details, and tile drainage modifications. Key project components include removing an existing dike, constructing a new dike with an auxiliary spillway, installing a new water control structure, and rerouting two existing tile drainage lines to outlet into a stilling basin.

The project will involve significant earthwork, including approximately 8,820 cubic yards of fill material, with excavation and removal of existing infrastructure. The design follows Natural Resources Conservation Service (NRCS) Conservation Practice Standards, specifically standards 656 for Constructed Wetlands and 410 for Grade Stabilization Structure. The project includes installing a new aluminum toe wall outlet, a water control structure with 10-inch pipe outlets, and two tile drainage lines with specific elevation and connection requirements. The normal pool elevation is set at 1228.0 feet, with the newly constructed dike reaching an elevation of 1231.0 feet. The engineer of record is Michael L. Bourland, P.E., from the Iowa Department of Agriculture's Mines & Minerals Bureau, who certified the plans meet applicable NRCS standards and regulations.

View the file

Other files

File	Type	Posted
1333123-event.pdf	PDF	Aug 13, 2025
1-How991129B_25-08_NOTICE_TO_BIDDERS.pdf	PDF	Aug 13, 2025
2-How991129B_25-08_DOCUMENT-CC_Affidavit.pdf	PDF	Aug 13, 2025
5-How991129B_25-08_GENERAL REQUIREMENTS.pdf	PDF	Aug 13, 2025
6-How991129B_25-08_SPECIFICATIONS.pdf	PDF	Aug 13, 2025
8-How991129B_25-08_APPENDIX-I.pdf	PDF	Aug 13, 2025
3-How991129B_25-08_DOCUMENT-DD_Contract.pdf	PDF	Aug 13, 2025
4-How991129B_25-08_DOCUMENT-EE_BidBond.pdf	PDF	Aug 13, 2025

On GovTribe

Work with this file

Download the original file
Contacts named in this file
Similar government files
Ask GovTribe AI about this file

Try for free Login

Text version

The file's text, extracted by GovTribe without its formatting.

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T M

T O F

A GR I C U L T UR E

L A

TEWARDSHIP

DES MOINES

MICHAEL L.

12804

BOURLAND

E N

E S

AWO

R E

OSS I N

N I

G N

N O

CALL 811 / 1-800-292-8989

2 Working Days BEFORE YOU DIG DigSafeWait48.com

IOWA

ONE CALL

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

N T O F

A GR I C U L T U R E

L A

TEWARDSHIP

License Number:

Signature:

Name (printed or typed):

My license renewal date is: December 31, 2025

Pages or sheets covered by this seal:

Date:

I hereby certify that this engineering document was prepared by me or under my direct personal supervision and that I am a duly licensed Professional Engineer under the laws of the State of Iowa

STATE OF IOWA

LOCAL VICINITY

SCALE: 1" = 1.5 MILES

C O

S H

IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

DIVISION OF SOIL CONSERVATION AND WATER QUALITY

HOW991129B

WATER QUALITY WETLAND PROJECT

SEC 29 TWP 99N RANGE 11W HOWARD COUNTY

PREPARED FOR:

IOWA DEPARTMENT OF AGRICULTURE & LAND STEWARDSHIP

DIVISION OF SOIL CONSERVATION & WATER QUALITY

HENRY A. WALLACE BUILDING

502 E. 9TH STREET

DES MOINES, IOWA 50319

(515) 281-4246

INDEX OF SHEETS:

1 COVER SHEET

2 GENERAL NOTES AND QUANTITIES

3 SITUATION PLAN WITH SURVEY CONTROL

4 SITE PREPARATION PLAN

5 SITE GRADING PLAN

6 ALUMINUM TOE WALL - OVERVIEW AND QUANTITIES

7 ALUMINUM TOE WALL - PROFILE AND PLAN VIEWS

8 ALUMINUM TOE WALL - NOTES AND FOUNDATION DETAILS

9 WATER CONTROL STRUCTURE DETAILS

10 PLAN AND PROFILE - TILE #1

11 PLAN AND PROFILE - TILE #2

12 TYPICAL DETAILS

MICHAEL L. BOURLAND

12804

ENTIRE DOCUMENT

ENGINEER:

MICHAEL L. BOURLAND, P.E.

MINES & MINERALS BUREAU

TEL: (515)-242-6130

E-MAIL: mike.bourland@iowaagriculture.gov

HOWARD COUNTY

PROJECT LOCATION

These plans are prepared in accordance with NRCS Job Classification III. The following Conservation Practice Standards were used:

656 - Constructed Wetlands 410 - Grade Stabilization Structure

To the best of my professional knowledge, judgment, and belief, these plans meet the applicable NRCS standards and applicable laws and regulations.

08-04-2025

AutoCAD SHX Text K O S S U T H

AutoCAD SHX Text H A N C O C K

AutoCAD SHX Text W I N N E B A G O

AutoCAD SHX Text C E R R O G O R D O

AutoCAD SHX Text W O R T H

AutoCAD SHX Text M I T C H E L L

AutoCAD SHX Text F L O Y D

AutoCAD SHX Text H O W A R D

AutoCAD SHX Text C H I C K A S A W

AutoCAD SHX Text H U M B O L D T

AutoCAD SHX Text W E B S T E R

AutoCAD SHX Text W R I G H T

AutoCAD SHX Text H A M I L T O N

AutoCAD SHX Text B O O N E

AutoCAD SHX Text S T O R Y

AutoCAD SHX Text P O L K

AutoCAD SHX Text W A R R E N

AutoCAD SHX Text D E C A T U R

AutoCAD SHX Text W A Y N E

AutoCAD SHX Text L U C A S

AutoCAD SHX Text F R A N K L I N

AutoCAD SHX Text B U T L E R

AutoCAD SHX Text B R E M E R

AutoCAD SHX Text H A R D I N

AutoCAD SHX Text G R U N D Y

AutoCAD SHX Text M A R S H A L L

AutoCAD SHX Text J A S P E R

AutoCAD SHX Text M A R I O N

AutoCAD SHX Text L E E

AutoCAD SHX Text

WASHINGTON

AutoCAD SHX Text

DES MOINES

AutoCAD SHX Text

MUSCATINE

AutoCAD SHX Text

LOUISA

AutoCAD SHX Text

HENRY

AutoCAD SHX Text

JEFFERSON

AutoCAD SHX Text

WAPELLO

AutoCAD SHX Text

KEOKUK

AutoCAD SHX Text

MAHASKA

AutoCAD SHX Text

MONROE

AutoCAD SHX Text

APPANOOSE

AutoCAD SHX Text

DAVIS

AutoCAD SHX Text

VAN BUREN

AutoCAD SHX Text

POWESHIEK

AutoCAD SHX Text

IOWA

AutoCAD SHX Text

JOHNSON

AutoCAD SHX Text

BUCHANAN

AutoCAD SHX Text

DELAWARE

AutoCAD SHX Text

DUBUQUE

AutoCAD SHX Text

TAMA

AutoCAD SHX Text

BENTON

AutoCAD SHX Text

LINN

AutoCAD SHX Text

JONES

AutoCAD SHX Text

JACKSON

AutoCAD SHX Text

CLINTON

AutoCAD SHX Text

CEDAR

AutoCAD SHX Text

SCOTT

AutoCAD SHX Text

ALLAMAKEE

AutoCAD SHX Text

WINNESHIEK

AutoCAD SHX Text

FAYETTE

AutoCAD SHX Text

CLAYTON

AutoCAD SHX Text

BLACK HAWK

AutoCAD SHX Text

EMMET

AutoCAD SHX Text

DICKINSON

AutoCAD SHX Text

OSCEOLA

AutoCAD SHX Text

LYON

AutoCAD SHX Text

PALO ALTO

AutoCAD SHX Text

CLAY

AutoCAD SHX Text

O'BRIEN

AutoCAD SHX Text

SIOUX

AutoCAD SHX Text

POCAHONTAS

AutoCAD SHX Text

BUENA VISTA

AutoCAD SHX Text

CHEROKEE

AutoCAD SHX Text

PLYMOUTH

AutoCAD SHX Text

CALHOUN

AutoCAD SHX Text

SAC

AutoCAD SHX Text

IDA

AutoCAD SHX Text

WOODBURY

AutoCAD SHX Text

MONONA

AutoCAD SHX Text

CRAWFORD

AutoCAD SHX Text

CARROLL

AutoCAD SHX Text

GREENE

AutoCAD SHX Text

DALLAS

AutoCAD SHX Text

GUTHRIE

AutoCAD SHX Text

AUDUBON

AutoCAD SHX Text

SHELBY

AutoCAD SHX Text

HARRISON

AutoCAD SHX Text

MADISON

AutoCAD SHX Text

ADAIR

AutoCAD SHX Text

CASS

AutoCAD SHX Text

POTTAWATTAMIE

AutoCAD SHX Text

CLARKE

AutoCAD SHX Text

UNION

AutoCAD SHX Text

ADAMS

AutoCAD SHX Text

MONTGOMERY

AutoCAD SHX Text

MILLS

AutoCAD SHX Text

FREMONT

AutoCAD SHX Text

PAGE

AutoCAD SHX Text

TAYLOR

AutoCAD SHX Text

RINGGOLD

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

M E N T O F

A G R I C U L T URE

L A

TEWARDSHIP

L N

S A

N D

Q U

A N

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

NT O F

A G R I C U L T UR E

L A

TEWARDSHIP

UTILITY NOTES:

1. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO PROTECT

ALL EXISTING PUBLIC AND/OR PRIVATE UTILITIES AND PUBLIC

ROADWAYS, INCLUDING ANY NOT SHOWN ON THESE DRAWINGS. THE

CONTRACTOR SHALL VERIFY ALL EXISTING UTILITIES PRIOR TO

CONSTRUCTION AND NOTIFY THE ENGINEER IF ANY CONFLICTS WITH

THE DRAWINGS OCCUR. ANY DAMAGE TO EXISTING UTILITIES AND/OR

PUBLIC ROADWAYS CAUSED BY CONTRACTOR TRENCHING SHALL BE

REPAIRED AT THE CONTRACTOR'S EXPENSE.

2. UNDERGROUND FACILITIES STRUCTURES AND UTILITIES ARE PLOTTED

FROM AVAILABLE SURVEYS, PUBLIC RECORDS, AND FIELD

INVESTIGATION WHEN AVAILABLE. THEIR LOCATIONS SHALL BE

CONSIDERED TO BE APPROXIMATE ONLY.

GENERAL NOTES:

1. REFERENCES TO "DIVISION" SHALL MEAN "DIVISION OF

SOIL CONSERVATION & WATER QUALITY"

2. ALL IMPROVEMENTS SHOWN ON THESE PLANS SHALL

COMPLY WITH THE GENERAL CONDITIONS, STANDARDS,

AND SPECIFICATIONS SET FORTH IN PROJECT

DOCUMENTS. SPECIFICATIONS OR STANDARDS

INCORPORATED BY REFERENCE SHALL ALSO BE

FOLLOWED.

3. OWNERSHIP: THIS DOCUMENT, AND THE IDEAS AND

DESIGN CONTAINED IN THIS DOCUMENT, ARE AN

INSTRUMENT OF PROFESSIONAL SERVICE, AND MAY NOT

BE USED, IN WHOLE OR IN PART, FOR ANY OTHER

PROJECT WITHOUT THE WRITTEN CONSENT OF THE

DIVISION.

4. REFERENCES TO PARTICULAR PRODUCTS,

TRADENAMES, OR MANUFACTURERS ARE INTENDED FOR

CLARITY ONLY AND DO NOT REPRESENT EXCLUSION OR

ENDORSEMENT BY THE DIVISION OR THE STATE OF

IOWA. EQUIVALENT PRODUCTS OR MATERIALS MAY BE

SUITABLE, SUBJECT TO THE APPROVAL OF THE

ENGINEER.

5. CONTRACTOR SHALL PROVIDE AT LEAST 48 HOURS

NOTICE TO THE ENGINEER AND/OR DIVISION PRIOR TO

COMMENCING CONSTRUCTION.

6. IF A CULTURAL RESOURCE IS IDENTIFIED DURING

CONSTRUCTION, CONTRACTOR IS TO STOP WORK

IMMEDIATELY AND NOTIFY THE ENGINEER OR THE LOCAL

NATURAL RESOURCE CONSERVATION SERVICE OFFICE.

7. THERE IS NO GUARANTEE THAT THE WETLAND WILL FILL

OR REMAIN FILLED WITH WATER.

TABLE: BID QUANTITIES

SPECIFICATIONS

IA-01 SITE PREPARATION

IA-05 POLLUTION CONTROL

IA-06 SEEDING

CS-08 MOBILIZATION AND DEMOBILIZATION

IA-09 SURFACE DRAIN INVESTIGATION

IA-11 REMOVAL OF WATER

IA-21 EXCAVATION

IA-23 EARTHWORK

IA-31 CONCRETE

IA-46 TILE DRAINS FOR LAND DRAINAGE

IA-51 CORRUGATED METAL PIPE CONDUITS

IA-61 LOOSE RIPRAP

IA-81 METAL FABRICATION AND INSTALLATION

IA-95 GEOTEXTILE

0 25 50 100 200

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

ENT O F

A G R I C U L T UR E

L A

TEWARDSHIP

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

ENT O F

A G R I C U L T UR E

L A

TEWARDSHIP

O N

N W

S U

Y C

O N

NOTES:

1. SURVEY IN BOUNDARY SHOWN COMPLETED BY DESIGNER ON APRIL 3, 2025 USING UTM84 15N

INTERNATIONAL FEET.

2. BENCHMARK AND CONTROL POINT 100 - BLACK X PLACED ON TOP OF FOUNDATION WALL ON

SOUTHEAST CORNER OF OLD BUILDING.

3. CONTROL POINTS 101, 103 AND 104 ARE 2' X 2' WOOD STAKES FLAGGED BY LATH.

4. FIELD VERIFY LOCATIONS & ELEVATIONS OF ALL CONTROL POINTS.

5. FIELD ENTRANCE AND ACCESS ROUTE SHALL BE RESTORED AT NO ADDITIONAL COST TO DIVISION..

NORTH

CP-103

CP-101

CP-104

BM & CP-100

HORIZONTAL CONTROL

Coordinates are in NAD84 UTM15 North in International Feet (IF)

VERTICAL CONTROL

Elevations established using Carlson receiver observed in NAVD 88 using

GEOID18.

Raw data was collected on April 3, 2025 within boundary shown

Topography outside survey area from LiDAR shape file provided by ISU on public website that were created in 2022 from 2020 data.

CONTROL POINT DATA

POINT NO. NORTHING EASTING ELEVATION DESCRIPTION

CP-100/B.M. 15751131.7967 1860132.6484 1234.0032 Marked X on SE corner of foundation wall

CP-101 15751543.2618 1860069.5214 1238.9767 Wood stake placed by path NE of wetland

CP-103 15751407.6030 1861084.5380 1240.0896 Wood stake placed by path E of wetland

CP-104 15750454.3846 1860936.9723 1232.8489 wood stake placed by path SE of wetland

On-Site Instrument Survey Boundary

Site Access Lane

Rock Piles

Exposed Tile at Surface (Tile #2 Area)

Broken Tile Location

(Tile #1 Area)

Scale 1" = 200'

AutoCAD SHX Text

AutoCAD SHX Text 1234.003

AutoCAD SHX Text

BM-CP1

AutoCAD SHX Text

AutoCAD SHX Text 1238.977

AutoCAD SHX Text

CP2

AutoCAD SHX Text

AutoCAD SHX Text 1240.090

AutoCAD SHX Text

CP3

AutoCAD SHX Text

AutoCAD SHX Text 1232.849

CP-4

0+00

1+00

2+00 3+00

4+00

5+00

8' 5'2H:1V

0+00 0+20 0+40 0+60 0+80 1+00 1+20 1+40 1+60 1+80 2+00 2+20 2+40 2+60 2+80 3+00 3+20 3+40 3+60 3+80 4+00 4+20 4+40 4+60 4+80 5+00 5+20 5+40

0 25 50 100 200

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T M E N T O F

A G R I C U L T UR E

L A

TEWARDSHIP

NOTES:

1. REMOVE TOP 6 INCHES IN OUTLINED AREA AND STOCKPILE FOR FUTURE USE AFTER NEW DIKE IS CONSTRUCTED (530 CY).

2. REMOVE AND DISCARD OFF WATER CONTROL STRUCTURE. PLASTIC PIPE, AND EXISTING TRACTOR TIRE AT OUTLET.

3. EXISTING ROCK AT OUTLET CAN BE ADDED TO ROCK PILES IN WETLAND OR BURIED IN NON-STRUCTURAL AREA ON SITE.

4. EXCAVATE CORE TRENCH TO MINIMUM DIMENSIONS SHOWN (1,182 CY CUT AND 1,420 CY FILL WITH 20% SHRINKAGE).

5. REMOVE ALL TILE FOUND UNDER THE DIKE TO AT LEAST 15 FEET EACH SIDE OF EMBANKMENT TOE.

6. EXCAVATE TILE EXPLORATION TRENCHES AT APPROXIMATE LOCATIONS INDICATED AND LEAVE TRENCH OPEN WHERE TILE IS

FOUND.

-3

E X.

S O

C E

NORTH

Tile Exploration Trenches

Existing Dike to be Removed and Replaced

Centerline of Core Trench

Core Trench Detail

Existing Water Control Structure to be Salvaged

Existing Outlet Pipe Tractor Tire to be removed and disposed of off site.

P R

R A

N P

Existing Grade at CenterlineOriginal Grade at Centerline from LiDAR

Elevation 1226.0'

Additional Excavation for Core Trench (5' below original grade)

Scale 1" = 100'

Proposed Borrow Area

AutoCAD SHX Text

0+00

1+00

2+00 3+00

4+00

5+00

0+20 0+40 0+60 0+80 1+001225

0+00 0+20 0+40 0+60 0+80 1+00 1+20 1+40 1+60 1+80 2+00 2+20 2+40 2+60 2+80 3+00 3+20 3+40 3+60 3+80 4+00 4+20 4+40 4+60 4+80

0 25 50 100 200

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

E NT O F

A G R I C U L T UR E

L A

TEWARDSHIP

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

E N T O F

A G R I C U L T UR E

L A

TEWARDSHIP

G R

A D

NOTES:

1. AFTER EXCAVATION AND BACKFILLING OF CORE TRENCH, DIKE

SHALL BE CONSTRUCTED USING METHOD 2 PROVIDED IN

SPECIFICATION 02600 TO ELEVATION 1131.0 FEET,

OVERBUILDING TO ALLOW FOR 5% SETTLEMENT. NEW DIKE

SHALL HAVE SIDE SLOPES OF 3H:1V, TOP WIDTH OF 10 FEET

AND A WAVE BERM WIDTH OF 8 FEET AT ELEVATION 1228.0

FEET, ALONG WITH A 20' WIDE AUXILIARY SPILLWAY AT

ELEVATION 1229.9 FEET.

2. TOTAL 8,820 CY FILL NEEDED TO CONSTRUCT TO NEAT LINES

SHOWN ASSUMING 20% SHRINKAGE AND 6 INCHES OF

TOPSOIL PLACED. REMOVAL OF DIKE AND CONSTRUCTION OF

AUXILIARY SPILLWAY IS ESTIMATED TO PROVIDE ALL

MATERIAL NEEDED TO CONSTRUCT NEW DIKE. IF NEEDED,

ADDITIONAL FILL MATERIAL CAN BE OBTAINED FROM ON SITE

AS APPROVED BY ENGINEER.

3. SEE SHEETS ___ THROUGH ___ FOR DETAILS REGARDING

ALUMINUM TOE WALL OUTLET AND SHEET ___ FOR DETAILS

FOR REPLACED WATER CONTROL STRUCTURE AND OUTLET

PIPE.

NORTH

Normal Pool Elev. 1228'

Auxiliary Spillway Elev. 1229.9 ft 20' wide with 3:1 side slopes

Existing Dike to be RemovedNewly Constructed Dike

Newly Constructed Dike at Elevation 1231.0'

Aluminum Toe Wall Outlet at Elevation 1228.0'

Auxiliary Spillway at Elevation 1229.9' to match top of aluminum toe wall outlet wing wall

PROFILE B-B'

CROSS SECTION A-A'

Aluminum Toewall Outlet with Elev. 1228.0'Downstream

Riprap

New Water Control Structure and Outlet Pipes

Scale 1" = 100'

Planned Borrow Area

AutoCAD SHX Text

BM-CP1

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T O F

A G R I C U L T U R E

L A

TEWARDSHIP

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T M E N T O F

A GR I C U L T UR E

L A

TEWARDSHIP

U M

T O

E W

N D

Q U

A N

AutoCAD SHX Text

1. Concrete shall have a minimum compressive strength at 28 days equal to 3500 psi. Concrete shall have a minimum compressive strength at 28 days equal to 3500 psi. 2. All reinforcing steel bars shall be Grade 60 - #4 bars. All reinforcing steel bars shall be Grade 60 - #4 bars. 3. The structure shall be fabricated from 12 gauge galvanized steel sheets conforming to The structure shall be fabricated from 12 gauge galvanized steel sheets conforming to ASTM A 929 with 3" by 1" corrugations. 4. Angles shall be ASTM A 36 structural steel, galvanized in accordance with ASTM A 123. Angles shall be ASTM A 36 structural steel, galvanized in accordance with ASTM A 123. 5. Bolts shall be 3/4" diameter galvanized carbon steel conforming to ASTM A 307. Bolts shall be 3/4" diameter galvanized carbon steel conforming to ASTM A 307. 6. Seam sealant shall be knife-grade asphalt mastic or polymer adhesive sealant tape, Seam sealant shall be knife-grade asphalt mastic or polymer adhesive sealant tape, Manus-Bond 64-A, or equal. 7. Drainfill aggregate shall meet the standard gradation of ASTM C 33 size 57 or 67. Do Drainfill aggregate shall meet the standard gradation of ASTM C 33 size 57 or 67. Do not place geotextile between drainfill and the 1/2" weep holes. 8. Riprap shall consist of well-graded rock, minimum size of 4", maximum size of 8". Riprap shall consist of well-graded rock, minimum size of 4", maximum size of 8". Riprap shall be underlain with nonwoven geotextile bedding. 9. Weir length L varies from 14.2' to 49.5' in 1.6' increments. Check with manufacturer Weir length L varies from 14.2' to 49.5' in 1.6' increments. Check with manufacturer or refer to Iowa NRCS hydraulic design spreadsheet, "Semicircular_Drop_Structure.xlsx" for a table of available weir lengths, including straight portion of weir dimension B.

AutoCAD SHX Text D

AutoCAD SHX Text 1.9'

AutoCAD SHX Text 3.0'

AutoCAD SHX Text 4.0'

AutoCAD SHX Text H

AutoCAD SHX Text 1.8'

AutoCAD SHX Text 1.9'

AutoCAD SHX Text 2.1'

AutoCAD SHX Text A

AutoCAD SHX Text 4.2'

AutoCAD SHX Text 5.4'

AutoCAD SHX Text 6.6'

AutoCAD SHX Text S*

AutoCAD SHX Text Wa

AutoCAD SHX Text

STANDARD STRUCTURE SIZES

AutoCAD SHX Text Item

AutoCAD SHX Text Quantity

AutoCAD SHX Text Unit

AutoCAD SHX Text Galvanized Steel Drop Structure

AutoCAD SHX Text

AutoCAD SHX Text each

AutoCAD SHX Text Concrete (3500 psi)

AutoCAD SHX Text 4.7

AutoCAD SHX Text cu.yd.

AutoCAD SHX Text Reinforcing Steel, Grade 60 - #4 Bars

AutoCAD SHX Text 236.9

AutoCAD SHX Text lb.

AutoCAD SHX Text Drainfill

AutoCAD SHX Text 1.0

AutoCAD SHX Text cu.yd.

AutoCAD SHX Text Rock Riprap

AutoCAD SHX Text 8.8

AutoCAD SHX Text cu.yd.

AutoCAD SHX Text Excavation, Structure

AutoCAD SHX Text

AutoCAD SHX Text cu.yd.

AutoCAD SHX Text Earthfill

AutoCAD SHX Text

AutoCAD SHX Text cu.yd.

AutoCAD SHX Text Corrugated Steel Pipe, 16 Gauge

AutoCAD SHX Text None

AutoCAD SHX Text ______ Dia.

AutoCAD SHX Text N/A

AutoCAD SHX Text lin.ft.

AutoCAD SHX Text ______ Dia.

AutoCAD SHX Text N/A

AutoCAD SHX Text lin.ft.

AutoCAD SHX Text Connecting Band, Steel

AutoCAD SHX Text N/A

AutoCAD SHX Text each

AutoCAD SHX Text Animal Guard, Steel

AutoCAD SHX Text N/A

AutoCAD SHX Text each

AutoCAD SHX Text Geotextile, Nonwoven

AutoCAD SHX Text

AutoCAD SHX Text sq.yd.

AutoCAD SHX Text

TILE OUTLET DESCRIPTION

AutoCAD SHX Text Tile outlet stubs (as required) shall be 2 ft. lengths of corrugated steel pipe, shop-welded to the structure as specified below: 1. ______ ft. from the left headwall at the ______ o'clock position (6:00-9:00) ______ inch diameter ______ ft. below the weir at flowline of C.M. Pipe 2. ______ ft. from the right headwall at the ______ o'clock position (3:00-6:00) ______ inch diameter ______ ft. below the weir at flowline of C.M. Pipe

AutoCAD SHX Text

MATERIAL NOTES

AutoCAD SHX Text

BILL OF MATERIALS

AutoCAD SHX Text

STANDARD DWG. IA-1409

AutoCAD SHX Text March 2013

AutoCAD SHX Text 9.2' 11.3' 13.7' 15.8' 11.3' 13.7' 15.8' 18.2' 13.7' 15.8' 18.2' 20.3'

AutoCAD SHX Text 0.0' 2.0' 4.0' 6.0' 0.0' 2.0' 4.0' 6.0' 0.0' 2.0' 4.0' 6.0'

AutoCAD SHX Text

STRUCTURE DIMENSIONS

AutoCAD SHX Text Overfall Height (D)

AutoCAD SHX Text 3.0

AutoCAD SHX Text ft.

AutoCAD SHX Text Notch Depth (H)

AutoCAD SHX Text 1.9

AutoCAD SHX Text ft.

AutoCAD SHX Text Headwall Height (A)

AutoCAD SHX Text 5.4

AutoCAD SHX Text ft.

AutoCAD SHX Text Headwall Length (S)

AutoCAD SHX Text 11.3

AutoCAD SHX Text ft.

AutoCAD SHX Text Notch Width (W)

AutoCAD SHX Text 7.0

AutoCAD SHX Text ft.

AutoCAD SHX Text Weir Length (L)

AutoCAD SHX Text 15.8

AutoCAD SHX Text ft.

AutoCAD SHX Text Straight Portion of Weir (B)

AutoCAD SHX Text 2.3

AutoCAD SHX Text ft.

AutoCAD SHX Text Added U/S Channel Width (Wa)

AutoCAD SHX Text

AutoCAD SHX Text ft.

AutoCAD SHX Text U/S Channel Bottom Width (Wu)

AutoCAD SHX Text

AutoCAD SHX Text ft.

AutoCAD SHX Text D/S Riprap Length (RL)L))

AutoCAD SHX Text

AutoCAD SHX Text ft.

AutoCAD SHX Text D/S Riprap Height (Rh)

AutoCAD SHX Text 2.0

AutoCAD SHX Text ft.

AutoCAD SHX Text Concrete Apron Elevation

AutoCAD SHX Text 1225.0

AutoCAD SHX Text ft.

AutoCAD SHX Text Weir Crest Elevation

AutoCAD SHX Text 1228.0

AutoCAD SHX Text ft.

AutoCAD SHX Text Top of Headwall Elevation

AutoCAD SHX Text 1229.9

AutoCAD SHX Text ft.

AutoCAD SHX Text Auxiliary Spillway Elevation

AutoCAD SHX Text 1229.9

AutoCAD SHX Text ft.

AutoCAD SHX Text Top of Embankment Elevation

AutoCAD SHX Text 1231.0

AutoCAD SHX Text ft.

AutoCAD SHX Text

ISOMETRIC VIEW

AutoCAD SHX Text 2:1

AutoCAD SHX Text 3:1

AutoCAD SHX Text Top

AutoCAD SHX Text 3:1

AutoCAD SHX Text Direction of Flow

AutoCAD SHX Text B

AutoCAD SHX Text

NOT TO SCALE

AutoCAD SHX Text Top of Fill to be a minimum 1 ft. Higher than Top of Headwall

AutoCAD SHX Text H

AutoCAD SHX Text 4.0'

AutoCAD SHX Text Rh

AutoCAD SHX Text D

AutoCAD SHX Text A

AutoCAD SHX Text Riprap (optional)

AutoCAD SHX Text Riprap

AutoCAD SHX Text 3:00

AutoCAD SHX Text 9:00

AutoCAD SHX Text 6:00

AutoCAD SHX Text Left

AutoCAD SHX Text Right

AutoCAD SHX Text 2:1

AutoCAD SHX Text 2:1 or

AutoCAD SHX Text flatter

* Minimum value of S for corresponding value of Wa.

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R T

M E N T O F

A GR I C U L T UR E

L A

TEWARDSHIP

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

NT O F

A G R I C U L T UR E

L A

TEWARDSHIP

U M

T O

E W

A N

D P

W S

AutoCAD SHX Text CONCRETE & REINFORCING STEEL HALF ELEVATION (Looking Upstream)

AutoCAD SHX Text

CONCRETE & REINFORCING STEEL HALF PLAN

AutoCAD SHX Text

STEEL STRUCTURE & RIPRAP HALF PLAN

AutoCAD SHX Text L/2

AutoCAD SHX Text Concrete Floor

AutoCAD SHX Text Tile Outlet (see page 1)

AutoCAD SHX Text

Symmetrical About Centerline

3" x 3" x 1/4" Galv. Steel Angle Headwall Stiffener

AutoCAD SHX Text Symmetrical About Centerline

AutoCAD SHX Text

STANDARD DWG. IA-1409

AutoCAD SHX Text March 2013

AutoCAD SHX Text Location of field- bolted splice (Detail B) will vary to fit sheets furnished

AutoCAD SHX Text X

AutoCAD SHX Text STEEL STRUCTURE & RIPRAP HALF ELEVATION (Looking Upstream)

AutoCAD SHX Text X

AutoCAD SHX Text Riprap

AutoCAD SHX Text Concrete Cutoff Wall

AutoCAD SHX Text

NOT TO SCALE

AutoCAD SHX Text

1. W = width for both steel structure headwall opening (weir W = width for both steel structure headwall opening (weir diameter) and downstream channel bottom width. 2. S = length for both steel headwall and concrete cutoff wall. S = length for both steel headwall and concrete cutoff wall. 3. For steel schedule and concrete dimensions, see page 3. For steel schedule and concrete dimensions, see page 3. 4. Ends of riprap are shown vertical but may be sloped for Ends of riprap are shown vertical but may be sloped for ease of construction at Contractor's option, as long as minimum dimensions shown are maintained. No extra payment will be made for additional rock required for sloped edges. 5. Geotextile shall extend along all riprap surfaces which come Geotextile shall extend along all riprap surfaces which come in contact with soil. 6. Bar spacings marked "Varies" shall be no greater than 12" Bar spacings marked "Varies" shall be no greater than 12" nor closer than 3"; adjust adjacent bars if needed. 7. For structures with D>3', keep downstream channel bottom For structures with D>3', keep downstream channel bottom >3', keep downstream channel bottom 3', keep downstream channel bottom width = W adjacent to structure, and side slopes at 2:1 up to weir crest elevation, to maintain soil backfill support for headwall.

AutoCAD SHX Text

NOTES

AutoCAD SHX Text 2:1

AutoCAD SHX Text 3:1

AutoCAD SHX Text

AutoCAD SHX Text Downstream Riprap with Geotextile (optional)

AutoCAD SHX Text

AutoCAD SHX Text B

AutoCAD SHX Text

AutoCAD SHX Text A

AutoCAD SHX Text

AutoCAD SHX Text A

AutoCAD SHX Text Detail notation: Page where detail is taken Page where detail is shown

AutoCAD SHX Text

SECTION X-X

AutoCAD SHX Text Mastic

AutoCAD SHX Text 3/4" Dia. Bolts @ 6" O.C.

AutoCAD SHX Text 2:1 or flatter

AutoCAD SHX Text Lap splice, typ.

AutoCAD SHX Text 3" min.

AutoCAD SHX Text

AutoCAD SHX Text Lap splice

AutoCAD SHX Text Upstream riprap w/geotextile

AutoCAD SHX Text 3" min.

or flatter

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

NT O F

A G R I C U L T U R E

L A

TEWARDSHIP

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

N T O F

A GR I C U L T UR E

L A

TEWARDSHIP

U M

T O

E W

N O

A N

D F

O U

N D

O N

S pp p p

354.6 236.9

AutoCAD SHX Text

STANDARD DWG. IA-1409

AutoCAD SHX Text

1. Forms are not required for concrete apron or cutoff wall if excavated soil will Forms are not required for concrete apron or cutoff wall if excavated soil will stand vertically. Side slopes above the top of the concrete shall be 1.5:1 or flatter. 2. When necessary, the site shall be dewatered in accordance with Iowa Construction When necessary, the site shall be dewatered in accordance with Iowa Construction Specification IA-11, Removal of Water. A sump pump and crushed rock may be needed. 3. Set steel structure to grade and place reinforcing bars. Apply asphalt mastic Set steel structure to grade and place reinforcing bars. Apply asphalt mastic between steel sheets before bolting together. Check elevations of the weir, top of floor and bottom of cutoff trench. Check that the reinforcing steel has the required minimum cover. 4. Wrap reinforcing bars with three layers of electrical tape, or equal, where they Wrap reinforcing bars with three layers of electrical tape, or equal, where they pass through the steel structure. 5. Place the concrete floor and cutoff wall in one continuous pour. Place the concrete floor and cutoff wall in one continuous pour. 6. After a minimum of 24 hours, place drainfill, attach C.M. pipe to tile outlet stubs, After a minimum of 24 hours, place drainfill, attach C.M. pipe to tile outlet stubs, and install animal guards. Lay additional drain tile/tubing if needed to connect with existing surface drains. 7. Backfill around structure with moist soil. Place backfill in 6 inch layers and tamp Backfill around structure with moist soil. Place backfill in 6 inch layers and tamp to a density equivalent to the surrounding soil or, in the case of soft surrounding soil, tamp to a density equivalent to adjacent required earthfill. Remove dry soil from sides of excavations as backfill is placed so that moist soil is tamped against moist soil. Keep backfill approximately level around all parts of the structure. 8. Place riprap with geotextile bedding and complete grading and shaping. Place riprap with geotextile bedding and complete grading and shaping. 9. Seed, fertilize and mulch all disturbed areas in accordance with the seeding plan Seed, fertilize and mulch all disturbed areas in accordance with the seeding plan provided by NRCS.

AutoCAD SHX Text

CONSTRUCTION NOTES

AutoCAD SHX Text

SECTION ON CENTERLINE

AutoCAD SHX Text Galvanized Steel Toewall Drop Spillway

AutoCAD SHX Text Weir Crest

AutoCAD SHX Text 1/2" Dia. Weep Holes @ 12" O.C. Max.

AutoCAD SHX Text 3" x 3" x 1/4" Angle Stiffener

AutoCAD SHX Text Note 2

AutoCAD SHX Text 3/4" Dia. Bolts @ 3" O.C. Vertically

AutoCAD SHX Text

WEIR

AutoCAD SHX Text 3" x 3" x 1/4" Galvanized Steel Angle

AutoCAD SHX Text 3/4" Dia. Bolts at max. 10" spacing

AutoCAD SHX Text 3" x 3" x 1/4" Angle Stiffener (top of headwall)

AutoCAD SHX Text 1/4 1/4@3

AutoCAD SHX Text Paint angle faces with asphalt mastic before field bolting together

AutoCAD SHX Text 3" x 3" x 1/4" Galvanized Steel Angles

AutoCAD SHX Text Type 20

AutoCAD SHX Text

NOT TO SCALE

AutoCAD SHX Text NOTES: 1. Drainfill extends completely around weir. Drainfill extends completely around weir. 2. Field drill 7/8" holes as required in the steel structure. Place steel Field drill 7/8" holes as required in the steel structure. Place steel reinforcement through holes. Wrap rebar as described in Construction Note 4.

AutoCAD SHX Text Note 2

AutoCAD SHX Text 1/4 1/2@10

AutoCAD SHX Text Galvanized steel headwall, 3"x1" corrugations

AutoCAD SHX Text 1/4 1/4@3

AutoCAD SHX Text Note 1

AutoCAD SHX Text Geotextile

AutoCAD SHX Text Riprap

AutoCAD SHX Text Galvanized steel headwall, 3"x1" corrugations

AutoCAD SHX Text Riprap (optional)

AutoCAD SHX Text

AutoCAD SHX Text A

AutoCAD SHX Text

AutoCAD SHX Text C

AutoCAD SHX Text

AutoCAD SHX Text C

AutoCAD SHX Text QUANTITY FORMULAS: CONCRETE: [(W+1.5)( +B+0.5)(0.75) + (W+2S+1.5)(2.75)]/27 (CuYd) W2+B+0.5)(0.75) + (W+2S+1.5)(2.75)]/27 (CuYd) DRAINFILL: { [( +1.5) - ( ) ] + 3B}/27 (CuYd) W2+1.5) - ( ) ] + 3B}/27 (CuYd) W2) ] + 3B}/27 (CuYd) UPSTREAM RIPRAP: { [( +4) - ( ) ]+8B}/27 (CuYd) [( +4) - ( ) ]+8B}/27 (CuYd) W2+4) - ( ) ]+8B}/27 (CuYd) W2) ]+8B}/27 (CuYd) DOWNSTREAM RIPRAP: (W+4Rh)(R )/27 (CuYd) UPSTREAM GEOTEXTILE: { [( +4) -( ) ] + 10B + p( +4)}/9 (SqYd)* [( +4) -( ) ] + 10B + p( +4)}/9 (SqYd)* W2+4) -( ) ] + 10B + p( +4)}/9 (SqYd)* W2) ] + 10B + p( +4)}/9 (SqYd)* ( +4)}/9 (SqYd)* W2+4)}/9 (SqYd)* DOWNSTREAM GEOTEXTILE: (R +1)(W+4.47Rh+2)/9 (SqYd)* *Geotextile formulas for covered surfaces only

AutoCAD SHX Text

AutoCAD SHX Text L

AutoCAD SHX Text

AutoCAD SHX Text L

AutoCAD SHX Text Mastic

AutoCAD SHX Text Mark

AutoCAD SHX Text Type

AutoCAD SHX Text B

AutoCAD SHX Text C

AutoCAD SHX Text Quantity

AutoCAD SHX Text Length

AutoCAD SHX Text Total Length

AutoCAD SHX Text Quantity Formulas

AutoCAD SHX Text Length Formulas

AutoCAD SHX Text

AutoCAD SHX Text 2'-4"

AutoCAD SHX Text 6'-10"

AutoCAD SHX Text

AutoCAD SHX Text 9'-2"

AutoCAD SHX Text 82.5'

AutoCAD SHX Text W + 2

AutoCAD SHX Text C Leg = + B + 1'W2 + B + 1'

AutoCAD SHX Text

AutoCAD SHX Text Str.

AutoCAD SHX Text

AutoCAD SHX Text 2'-4"

AutoCAD SHX Text 53.6'

AutoCAD SHX Text 2[RoundUp(S - .25')]

AutoCAD SHX Text Given

AutoCAD SHX Text

AutoCAD SHX Text Str.

AutoCAD SHX Text

AutoCAD SHX Text 16'-3"

AutoCAD SHX Text 162.5

AutoCAD SHX Text Given

AutoCAD SHX Text W2 + S + 1.42'

AutoCAD SHX Text

AutoCAD SHX Text Str.

AutoCAD SHX Text

AutoCAD SHX Text 8'-0"

AutoCAD SHX Text 56.0'

AutoCAD SHX Text RoundUp( + B + 0.5')W2 + B + 0.5')

AutoCAD SHX Text W + 1.0'

AutoCAD SHX Text

STEEL SCHEDULE

AutoCAD SHX Text STEEL REINFORCING NOTES: 1. Radius of bend for Type 20 Radius of bend for Type 20 bar = 2". 2. Alternate splice locations for Alternate splice locations for Mark 3 bars may be used at Contractor's option, with Engineer's approval. Minimum splice length is 1'-9". 3. Minimum splice length for Minimum splice length for Mark 4 bars is 1'-4".

AutoCAD SHX Text (All #4 bars)

AutoCAD SHX Text

AutoCAD SHX Text B

AutoCAD SHX Text Total Length

AutoCAD SHX Text Weight = Total Length x 0.668 lb/lin. ft.

AutoCAD SHX Text lin. ft.

AutoCAD SHX Text lb.

AutoCAD SHX Text

CONCRETE DIMENSIONS SUMMARY

AutoCAD SHX Text

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T M

T O F

A GR I C U LT U R E

L A

TEWARDSHIP

W A

C O

O L

U C

E D

-0

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T M E N

T O F

A G R I C U L T URE

L A

TEWARDSHIP

Outlet into Stilling Basin Invert Elev. 1224.0' Rodent Guard Placed on End

Intake from Wetland Invert Elev. 1225.0'

Rodent Guard Placed on End

45° Elbow at Sta. 0+45

New In-line Water Control Structure 5' in height with 10-inch pipe outlets

Placed on 3-inches leveling gravel with Bottom Elevation at 1125.0'

29 LF of 10-inch diameter HDPE pipe

31 LF of 10-inch diameter HDPE pipe (including elbow)

N O

Scale 1" = 10'

Three 4' x 4' Anti-Seep Collars at Stations 0+32, 0+47 and 0+60

0+00 0+20 0+40 0+60 0+80

0 10 20 30

0+00 0+50 1+00 1+50 2+00 2+50 3+00

0+00 1+00

2+00 3+00

0 25 50

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T M

ENT O F

A G R I C U L T U R E

L A

TEWARDSHIP

N A

N D

P R

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T M

EN T O F

A G R I C U L T UR E

L A

TEWARDSHIP

N O

Scale 1" = 30'

Existing Tile Line (assumed depth)

Existing Ground Surface New Tile

Additional Fill for Cover

Connecting Tile

Notes:

1. Waterways have tile on both sides to be daylighted to wetland.

2. Exploration trenches are needed to determine location and invert elevations.

3. New tile to be placed should be non-perforated corruagated plastic with a minimum diameter of 6 inches with slope of 0.1% if possible.

4. Existing tile on one side should be connected other side at a location that existing elevations allow.

5. End of new outletted tile should be at elevation 1129.0' with 20' CMP with rodent guard placed at end into stilling basin with erosion stone. (See detail on Sheet 12)

6. Engineer must be on site during tile investigation to determine tie in location for each tile.

Tile Exploration Trench

Observed Tile Break Locations

20' CMP at end with rodent guard

Tile Outlet Stilling Basin

0+000+501+00

0+00

1+00

1+51

0 25 50

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T M E N T O F

A G R I C U L T URE

L A

TEWARDSHIP

N A

N D

P R

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

E N T O F

A G R I C U L T UR E

L A

TEWARDSHIP

Scale 1" = 20'

NORTH

Existing Tile Line (assumed depth)

Existing Ground Surface New Tile

Additional Fill for Cover 20' CMP at end with rodent guard

Tile Outlet Stilling Basin

Notes:

1. Waterways have tile on both sides to be daylighted to wetland.

2. Exploration trenches are needed to determine location and invert elevations.

3. New tile to be placed should be non-perforated corruagated plastic with a minimum diameter of 6 inches with slope of 0.1% if possible.

4. Existing tile on one side should be connected other side at a location that existing elevations allow.

5. End of new outletted tile should be at elevation 1129.0' with 20' CMP with rodent guard placed at end into stilling basin with erosion stone.

(See detail on Sheet 12)

6. Engineer must be on site during tile investigation to determine tie in location for each tile.

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T M

T O F

A GR I C U LT UR E

L A

TEWARDSHIP

C A

L D

A D

T O

U R

D L

O F

C O

D W

Q U

Y H

Y A.

E . 9 th S

T, D

, I

O W

) 2

-4

H O

C W

R Q

U A

D P

R O

SHEET

D W

G D

N B

. B Y:

1 2 3 4

IOWA D

A R

T O F

A G R I C U L T U R E

L A

TEWARDSHIP

SCALE: NONE

SCALE: NONE12

TILE JOINT CONNECTION DETAIL

ADDITIONAL PIPE COVER FILL

SECTION "A"

PIPE INVERT ELEV.

1129.0'

20' CMP OUTLET PIPE

CONNECTED TO 6-INCH

CORRUGATED PE TILE

PLAN VIEW

SECTION "B"

1.5'

PIPE OVERHANG

WIDTH = 8'

1.5:1 SIDE SLOPES

MAX. ALL SIDES (TYP.)

12" MIN.

24" MAX.

LENGTH = 10'

3' 3'

FLAT

BOTTOM

LOCATION STATION

CENTER OF POOL

EROSION STONE UNDERLAIN

BY FILTER FABRIC

8 OZ. NON-WOVEN

GEOTEXTILE FABRIC

(TYP.)

TILE OUTLET STILLING BASIN DETAIL

Pipe Joint Wrap Tightly with three wraps of Class 1 Non-Woven Geotextile Fabric

Encase in at Least 3-inches of Concrete

1.5 x D

NOTES:

1. COUPLERS CAN BE USED WHEN SIMILAR TILE

MATERIALS USED

2. LARGER CMP CAN BE USED TO OUTLET TILE

WITHOUT CONCRETE AT JOINT IF PLASTIC TILE

EXTENDS 18 INCHES INTO CMP AND TILE TAPE AND

FABRIC WRAPS AROUND JOINT ARE UTILIZED.

Sheets and Views

Miller-Reis_Wetland-COVER

Miller-Reis_Wetland-GEN_NOTES

Miller-Reis_Wetland-SITU-ALL

Miller-Reis_Wetland-SITE_PREP

Miller-Reis_Wetland-GP

Miller-Reis_Wetland-ATW1

Miller-Reis_Wetland-ATW2

Miller-Reis_Wetland-ATW3

Miller-Reis_Wetland-WCS

Miller-Reis_Wetland-TILE1

Miller-Reis_Wetland-TILE2

Miller-Reis_Wetland-DTL_1

	2025-08-11T08:54:21-0500
Michael L. Bourland

File details come from the government source that posted it. Updated Aug 14, 2025.