STATE OF IOWA

DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

DIVISION OF SOIL CONSERVATION AND WATER QUALITY

Winn981024A NUTRIENT REDUCTION

WETLAND PROJECT

CONSTRUCTION CONTRACT

BID NO. 25-20

SECTION 24, TOWNSHIP 98 NORTH, RANGE 10 WEST

WINNISHEIK COUNTY, IOWA

PREPARED FOR: IOWA DEPARTMENT OF AGRICULTURE & LAND STEWARDSHIP

DIVISION OF SOIL CONSERVATION AND WATER QUALITY

HOOVER STATE OFFICE BUILDING

1305 EAST WALNUT STREET

DES MOINES, IOWA 50319

PREPARED BY: BOLTON & MENK

1519 BALTIMORE DR

AMES, IA 50010

515-509-9296

December 2025

PLANS

MADISON RD

C O

R D

W

0T

H A

V E

270TH ST

0T

H A

V E

0T

H A

V E

5T

H A

V E

250TH ST

7T

H A

V E

225TH ST

CO RD W14

C O

R D

W

TOWN LINE RD220TH ST

0T

H A

V E

5T

H A

V E

5T

H A

V E

250TH ST

5T

H A

V E

5T

H A

V E

230TH ST

0T

H A

V E

0T

H A

V E

270TH ST

MADISON RD

7T

H A

V E

5T

H A

V E

240TH ST

230TH ST

2N

D A

V E

265TH

ST

307TH

A

VE

RIDGEWAY

L I N C O L N

M A D I S O N

10 11 12

131415

22 24

252627

34 35 36

7 8 9

19 20 21

282930

31 32 33

POP.

Dry

SUMNER 244SUMNER 40

MADISON 80 MADISON 283

MADISON 284

MADISON 289

MADISON 290

MADISON 292

LINCOLN 85

LINCOLN 86

LINCOLN 305

LINCOLN 306

LINCOLN 307

LINCOLN 313

MADISON 83

291 A

347071

347830 347841

347851

347911

347941

347970

348051 348060

348070

348080

348151

348160

348170

348230

361080

347932

347961 W14

R-10W

T-

N

S T A T E O F M I N N E S O T A

R-9W

SHEET

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DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

A.01

TITLE SHEET

PROJECT DATUM: STATE PLANE

HORIZONTAL: IOWA NORTH

VERTICAL: NAVD 1988

MY LICENSE RENEWAL DATE IS

PAGES OR SHEETS COVERED BY THIS SEAL:

LICENSE NUMBER: DATE:

I OWA

LI

CE

NS

ED

PROFESS IONAL ENG

INEER

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.

29449

12/31/2026

ALL SHEETS

BRANDON C.

SHORT

29449

BRANDON C. SHORT, PE

WINNESHIEK COUNTY, IA

CONSTRUCTION PLANS FOR

IDALS NO. WINN981024D

NUTRIENT REDUCTION WETLAND

WINNESHIEK COUNTY, IOWA

NOVEMBER 2025

THE SPECIFICATIONS AS PREPARED BY IOWA DEPARTMENT OF AGRICULTURE

AND LAND STEWARDSHIP AND BOLTON & MENK, INC. SHALL BE CONSIDERED

AS PART OF THIS DOCUMENT. NATURAL RESOURCES CONSERVATION SERVICE

CONSTRUCTION SPECIFICATIONS SHALL APPLY.

THE CURRENT EDITION OF THE "IOWA STATEWIDE URBAN STANDARD

SPECIFICATIONS FOR PUBLIC IMPROVEMENTS" SHALL GOVERN.

IOWA DEPARTMENT OF TRANSPORTATION "STANDARD SPECIFICATIONS FOR

HIGHWAY AND BRIDGE CONSTRUCTION" AND ALL CURRENT GENERAL

SUPPLEMENTAL SPECIFICATIONS AND MATERIALS INSTRUCTIONAL

MEMORANDUM SHALL GOVERN AS REFERENCED.

ALL APPLICABLE FEDERAL, STATE, AND LOCAL LAWS AND ORDINANCES WILL BE

COMPLIED WITH IN THE CONSTRUCTION OF THIS PROJECT.

GOVERNING SPECIFICATIONS

THE SUBSURFACE UTILITY INFORMATION IN THIS PLAN IS

UTILITY QUALITY LEVEL D. THIS UTILITY QUALITY LEVEL WAS

DETERMINED ACCORDING TO THE GUIDELINES OF CI/ASCE

38-02, ENTITLED "STANDARD GUIDELINES FOR THE

COLLECTION AND DEPICTION OF EXISTING SUBSURFACE

UTILITY DATA."

THE CONTRACTOR IS RESPONSIBLE FOR CONTACTING IOWA

ONE CALL BY PHONE AT 811, OR ON THE WEB AT

HTTP://WWW.IOWAONECALL.COM/. TICKET# ___________.

TICKET NUMBER MUST BE PROVIDED TO THE NRCS PRIOR TO

COMMENCEMENT OF WORK.

NOTES

1. IF A CULTURAL RESOURCE IS IDENTIFIED DURING

CONSTRUCTION, STOP WORK IMMEDIATELY AND NOTIFY

THE LOCAL NATURAL RESOURCES CONSERVATION SERVICE

OFFICE.

2. THERE IS NO GUARANTEE THAT THE WETLAND WILL FILL OR

REMAIN FILLED WITH WATER.

PROJECT

LOCATION

CONSERVATION PRACTICE STANDARDS USED:

656 - CONSTRUCTED WETLAND

NRCS JOB CLASS: IV

300 AC<WATERSHED AREA<1000 AC

TO THE BEST OF MY PROFESSIONAL KNOWLEDGE,

JUDGEMENT, AND BELIEF, THESE PLANS MEET APPLICABLE

NRCS STANDARDS AND APPLICABLE LAWS AND

REGULATIONS.

CLIENT ACCEPTANCE

SIGNATURE DATE

SHEET LIST TABLE

SHEET NUMBER SHEET TITLE

A.01 TITLE SHEET

A.02 PLAN OVERVIEW SHEET

B.01 CPDT INSTALLATION DETAILS

B.02 MISC. DETAILS

B.03 WATER CONTROL STRUCTURE DETAIL

C.01 ESTIMATE QUANTITIES

D.01 GRADING OVERVIEW

D.02 PLAN & PROFILE - EMBANKMENT

D.03 PLAN & PROFILE - CHUTE

D.04 PLAN & PROFILE - AUX SPILLWAY & DIVERSION BERM 1

D.05 PLAN & PROFILE - DIVERSION BERM 2 & 3

K.01 SEEDING PLAN

M.01 DRAWDOWN PIPE AND SOUTH RE-LAY

M.02 NORTH TILE RE-LAY

brandon.short Text Box 11/12/2025

EXISTING

UPSTREAM POND

EXISTING

UPSTREAM POND

EXISTING

UPSTREAM POND1160

90 1190

TOP OF DAM = 1166.50

NWL = 1162.00

DEEP WATER AREA

BELOW 1159.00

RE-LAY EXISTING TILE

10" CPDT

RE-LAY EXISTING TILE

8" CPDT

PROPOSED 100-YR

HWL = 1165.48

TOE DRAIN

12" RCP

MODIFIED SW-402 WATER

CONTROL STRUCTURE

25-FT AUXILIARY SPILLWAY 1164.50

INVESTIGATE FOR TILE

RE-LAY IF LOCATED

INVESTIGATE FOR TILE

RE-LAY IF LOCATED

INVESTIGATE FOR TILE

RE-LAY IF LOCATED

DIVERSION BERM

EMBANKMENT BORROW AREA

EXPAND POOL

48-FT OUTLET CHUTE

LINED WITH TIED CONCRETE BLOCK MAT

ROCK CHECK DAM

FEMA FLOOD HAZARD LAYER

6" DRAIN TILE

6" DRAIN TILE

CONSTRUCTION ACCESS

FROM STATE HWY 9

8" REBAR LAND MARKER

N: 3934839.586 E: 5330553.712

EL: 1177.666

REBAR LAND MARKER

ALUMINUM DISK 19211

N: 3936163.219 E: 5330552.745

EL: 1194.732

2" REBAR LAND MARKER

ALUMINUM CAP 11422

N: 3936144.172 E: 5329227.739

EL: 1173.296

REBAR LAND MARKER

N: 3936107.923 E: 5330555.156

EL: 1194.778

PROPOSED EASEMENT BOUNDARY

MAGNET LAND MARKER

N: 3936188.128 E: 5330554.555

EL: 1196.869

REBAR LAND MARKER

N: 3936263.811 E: 5330666.42

EL: 1189.82

MAGNET LAND MARKER

N: 3934892.672 E: 5330579.219

EL: 1179.141

EXISTING 6" TILE

EXISTING 8" TILE

NORMAL POOL (1162.00)

DEEP WATER AREA (<1159.00)

100-YEAR HWL

PROPOSED EASEMENT BOUNDARY

EXCAVATE TO 1161.00

RIP-RAP

STRUCTURE SEEDING

LEGEND

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DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

A.02

PLAN OVERVIEW SHEET

R

FEETSCALE

0 100 50

HORZ.

DESIGN CRITERIA VALUE UNIT REQUIREMENT

WATERSHED AREA 655 ACRES

POOL NORMAL WATER LEVEL (NWL) ELEV 1162.00 FT

DESIGNED WETLAND POOL AREA (@ NWL) 3.6 ACRES

PERCENT POOL AREA TO WATERSHED AREA 0.55 % Range 0.5% to 2% of watershed area

MAXIMUM POOL DEPTH 5 FT

AVERAGE POOL DEPTH 2.1 FT

DEEP WATER AREA (DEPTH > 3 FT) 0.6 ACRES

PERCENT DEEP WATER TO POOL AREA 16.2 % Less than 25%

POOL STORAGE VOLUME AT NWL 7.6 ACRE-FT

EMBANKMENT ELEVATION 1166.50 FT

POOL STORAGE VOLUME AT EMBANKMENT 31.52 ACRE-FT

OVERFLOW ELEVATION 1164.80 FT Auxiliary Spillway

POOL STORAGE VOLUME AT OVERFLOW 20.3 ACRE-FT

PRIMARY WEIR ELEVATION 1162.00 FT TCBM Chute

PRIMARY WEIR WIDTH 48 FT

TOTAL EASEMENT AREA 15.6 ACRES

AREA OF BUFFER 12.0 ACRES

RATIO BUFFER AREA TO NWL POOL AREA 3.3 Less than 4

25-YEAR STORM HWL IN POOL 1164.69 FT

25-YEAR PEAK INFLOW 699 CFS

25-YEAR PEAK OUTFLOW 688 CFS

100-YEAR STORM HWL IN POOL 1165.48 FT

100-YEAR PEAK INFLOW 1067 CFS

100-YEAR PEAK OUTFLOW 1050 CFS

WETLAND ELEV INCREMENTAL CUMULATIVE CUMULATIVE

POOL DEPTH AREA VOLUME VOLUME

(FT) (FT) (FT2

) (FT3

) (AC-FT)

0.0 1157.0 1,400

2.0 1159.0 25,500 26,900 0.62

4.0 1161.0 134,400 186,800 4.29

5.0 1162.0 157,300 332,650 7.64

6.0 1163.0 181,000 501,800 11.52

7.0 1164.0 213,500 699,050 16.05

8.0 1165.0 249,200 930,400 21.36

9.0 1166.0 310,700 1,210,350 27.79

SHEET

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DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

B.01

CPDT INSTALLATION DETAILS

FLAT BOTTOM TRENCH INSTALLATION

FILL TRENCH TO 6" ABOVE TOP OF PIPE WITH CRUSHED STONE OR GRAVEL

MEETING THE REQUIREMENTS IN TABLE 2. BEDDING MATERIAL SHALL BE

INCIDENTAL TO THE PIPE INSTALLATION.

PREFFERED TRENCH INSTALLATION BOTTOM

CORRUGATED POLYETHYLENE DRAINAGE TUBING

MATERIAL & INSTALLATION NOTES

NOT TO SCALE

SOURCE: ASTM F449

TRAPEZOIDAL GROOVE, "V" GROOVE, & CIRCULAR GROOVE

NOT TO SCALE

SOURCE: ASTM F449

6" MIN FOR

OPEN TRENCH

INSTALLATION

R

6" M

IN

A B G

0.

5R

0.

R

TRENCH WIDTH MEASURED

AT TOP OF PIPE

90° "V" GROOVE

90°

THE CIRCULAR GROOVE SHALL BE A

MINIMUM 0.35R DEEP AND SHALL

MATCH THE OUTSIDE CURVE

SHAPE OF THE DEFLECTED CPDT.

THE TRAPEZOIDAL GROOVE SHALL

BE SHAPED AND ADJUSTED SUCH

THAT POINTS A, B, & C WILL TOUCH

THE UNDEFLECTED CPDT FOR EACH

SIZE INSTALLED.

TRAPEZOIDAL GROOVE

CIRCULAR GROOVE

UNDISTURBED SOIL

UNDISTURBED SOIL

TRENCH WIDTH MEASURED

AT TOP OF PIPE

4" M

IN

SEE TABLE 2 FOR

BEDDING MATERIAL

NOTE: THIS IS AN ALLOWED ALTERNATIVE INSTALLATION FOR CPDT

1. ALL CPDT AND CONNECTORS FURNISHED SHALL BE IN COMPLIANCE WITH MATERIAL STANDARDS ASTM F405 AND F667, AS

APPLICABLE, AND SHALL BE CLASSIFIED AS HEAVY-DUTY UNDER THOSE STANDARDS.

2. EXCEPT MODIFIED HEREIN OR OTHERWISE APPROVED BY ENGINEER, ALL CPDT SHALL BE INSTALLED IN COMPLIANCE WITH THE

ASTM 449 STANDARD PRACTICE.

3. FOR PIPES 6” DIAMETER AND SMALLER A 90° V GROOVE BOTTOM MAY BE USED, FOR ALL LARGER PIPE A TRAPEZOIDAL BOTTOM OR A CIRCULAR BOTTOM CONFORMING TO THE OUTSIDE DIAMETER OF THE PIPE SHALL BE USED. PRIOR TO THE INSTALLATION OF CPDT, CONTRACTOR MUST PROVE TO ENGINEER THAT THE INSTALLATION REQUIREMENTS, INCLUDING THE

SHAPE OF THE TRENCH BOTTOM, WILL BE ACCOMPLISHED.

4. WHERE TRENCH BOTTOM IS IN FIRM UNDISTURBED SOIL, SHAPE TRENCH BASE GROOVE. WHERE EXCESS CUT OCCURS, OVEREXCAVATE AND PLACE MINIMUM THREE (3) INCH THICK, GRAVELLY SAND BEDDING TO RESTORE GRADE. THIS BEDDING SHALL MEET THAT REQUIRED FOR TRENCH INSTALLATION TYPE 3 ON PLAN SHEET C.02. IF DUE TO CONTRACTOR ERROR THIS MATERIAL AND WORK IS SUBSIDIARY TO THE INSTALLATION OF THE PIPE. CONTRACTOR MAY SUBSTITUTE PIPE BEDDING ROCK

AS THE BEDDING MATERIAL.

5. NATIVE SOILS MAY BE USED AS BACKFILL MATERIAL UNLESS UNSTABLE TRENCH CONDITIONS PREVENT THE TRENCH BOTTOM HOLDING THE SHAPED GROOVE. IF TRENCH BOTTOM WILL NOT HOLD GROOVE SHAPE CONTRACTOR SHALL NOTIFY ENGINEER IMMEDIATELY. A FLAT BOTTOM TRENCH INSTALLATION WILL THEN BE ASSUMED. THE REQUIRED BEDDING MATERIAL WILL BE

PAID UNDER THE TILE TRENCH STABILIZATION AND CRADLING ROCK BID ITEM.

6. MINIMUM TRENCH WIDTH IS PIPE OUTSIDE DIAMETER PLUS FOUR (4) INCHES FOR PLOWED INSTALLATION AND PIPE OUTSIDE

DIAMETER PLUS TWELVE (12) INCHES FOR OPEN TRENCH INSTALLATION.

7. ALL LATERAL CONNECTIONS, ELBOWS, TEES, ALIGNMENT CURVES, START HOLES AND ALL PORTIONS OF THE TRENCH NOT MEETING THE GROOVED TRENCH INSTALLATION REQUIREMENTS SHALL BE FILLED TO A MINIMUM OF SIX (6) INCH COVER OVER THE PIPE WITH GRADED CRUSHED STONE OR GRAVEL AS SHOWN ON TABLE 2 OF THIS SHEET. UNLESS DUE TO CONTRACTOR ERROR THIS BEDDING MATERIAL WILL BE PAID UNDER THE TILE TRENCH STABILIZATION AND CRADLING ROCK BID ITEM.

8. MANUFACTURER'S ENDCAPS SHALL BE INSTALLED AT THE TERMINATION OF EACH LINE UNLESS A CONNECTION TO AN EXISTING

DRAIN IS MADE.

9. WITH THE INSTALLATION OF THE FIRST REACH OF CPDT ON THE PROJECT, CONTRACTOR IS REQUIRED TO WORK WITH THE

ENGINEER TO CHECK AND CONFIRM THAT THE PIPE STRETCH, IF ANY, DOES NOT EXCEED 5%.

10. ALIGNMENT TURNS MAYBE MADE USING EITHER A MANUFACTURED FITTING OR CURVING THE LINE WITH A 25' MINIMUM

RADIUS.

R25'

PI

X °

PT

PT

Table 1 Maximum Allowable Buried Depth to Flowline of CPDT

Nominal Pipe Diameter (IN)

Pipe Quality

(ASTM)

Trench Width at Top of the Pipe (FT)

12" 18" 24" 30" or Greater

Standard 13 7 5.5 5

Heavy-duty Any 10 7 6

Standard 10 7 5.5 5

Heavy-duty Any 9.5 6.5 6

Standard 10 7 5.5 5

Heavy-duty Any 10 7 6

10 Heavy-duty ... 9 7 6 12 Heavy-duty ... 9 7 6 15 Heavy-duty ... ... 7 6

Table 2 Acceptable Bedding Material and Compaction Requirements

Description Percentage Passing Sieve Sizes Minimum

Standard Density (%)

Maximum Compaction Layer Height

(IN.)1" 3/4" No. 4

Crushed Stone Crushed Gravel* 100% > 95% < 5% Dumped 18

* Class 1 Bedding Material Per SUDAS 3010.202A is an Allowable Substitute

DEGREES Δ DELTA

20° 4.41 30° 6.7 45° 10.36 60° 14.43 70° 17.51 80° 20.98 90° 25

MISC. DETAILS

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DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

B.02

ALTERNATIVE 1: RCP ANTI-SEEP COLLAR

NOT TO SCALE

1/2" X 2" SLOTTED HOLES

FOR 3/8" DIA. BOLTS

CONTINUOUS WELD

BETWEEN BAND

AND COLLAR.

3'

3'

6'

SLOTTED HOLES

@ 8" O.C.

CONTINUOUS WELD

BETWEEN BAND

AND COLLAR.

BAND

BOTTOM OF BAND

2" 2"

BAND

A

A

12"TOP OF BAND

BOTTOM OF COLLAR

CORRUGATED METAL SHEET WELDED

TO CENTER OF SMOOTH METAL

BAND WITH MASTIC APPLIED FOR

SEALANT AROUND THE PIPE.

OPTIONAL SUBSTITUTE -

CAST-IN-PLACE CONCRETE BAND.

ANTI-SEEP COLLAR DETAILS

ALTERNATIVE 2: COMPOSITE BENTONITE AGGREGATE COLLAR

NOT TO SCALE

12" ID

RCP

TRENCH WIDTH (SEE PLANS)

6 FT MIN. COLLAR WIDTH

FT

C O

LL

AR

TH

IC

KN

ES

S

NOTES:

1. COMPOSITE BENTONITE AGGREGATE

(CBA) SHALL BE AQUABLOK OR

APPROVED EQUAL.

2. COLLAR SHALL EXTEND 2 FT BELOW

BOTTOM OF PIPE AND 2 FT ABOVE

TOP OF PIPE

3. COLLAR SHALL BE A MINIMUM OF 6 FT

WIDE AND EXTEND A MINIMUM OF 6"

BEYOND EDGE OF TRENCH

4. NO COMPACTION OF CBA IS

REQUIRED.

5. EXCAVATE AND BACKFILL THE

REMAINDER OF THE TRENCH AS

NOTED IN THE PLANS.

CORRUGATED METAL SHEET

GALVANIZED STEEL

PREFABRICATED HPDE ANTI-SEEP

COLLARS ARE AN ALLOWED ALTERNATIVE.

BAND

10 FT WIDE TOP (4.5 FT ABOVE NWL)

10 FT WAVE BERM (AT NWL)

5 FT MIN. CORE TRENCH WIDTH

(TOP AND BOTTOM)

NORMAL WATER LEVEL

TOP OF CORE TRENCH

AT NWL

1:1 MAX SLOPES

3:1

3:1

EMBANKMENT CROSS SECTION

10 FT WIDE TOP

6" BELOW NWL

NORMAL WATER LEVEL

DIVERSION BERM CROSS SECTION

EXISTING/EXCAVATED

GROUND SURFACE

3:1 SIDE SLOPES

BOTTOM OF CORE TRENCH

5 FT BELOW EXISTING GRADE

TOE DRAIN CROSS SECTION

1 FT

FT

6" PERFORATED DRAIN TILE

FINE DRAINFILL ENVELOPE

(MINIMUM EXTENTS)

3"

1.5" DIA. PERFORATIONS

SPACED 5" O.C.

SURROUND WITH EROSION STONE TO 3 FT HEIGHT

1.5 TN

12" RCP DRAWDOWN PIPE

CONCRETE COLLAR

AT JOINT

24" DIA. DUAL-WALL

HDPE RISER PIPE

24" AGRI DRAIN HEAVY DUTY BAR

GUARD OR APPROVED EQUAL

NWL

EXISTING GROUND

SURFACE

36" DIAMETER x 12" THICK

REINFORCED CONCRETE PAD

24" AGRI DRAIN HEAVY DUTY BAR

GUARD OR APPROVED EQUAL

12" RCP DRAWDOWN PIPE

CONCRETE COLLAR

AT JOINT

OUTLET RISER DETAIL

EMBANKMENT TOP ELEV = 1166.50

NOTES:

1. ONLY BUILD WAVE BERM ADJACENT TO POOL.

2. EMBANKMENT SHALL BE OVER-BUILT BY 5%

OF FILL HEIGHT. THE OVERBUILD FILL VOLUME

IS NOT INCLUDED IN THE PLAN QUANTITIES. A

5% REQUIRED OVERBUILD LINE IS SHOWN ON

D.02.

EMBANKMENT OVERBUILD (5% OF FILL HEIGHT)

PRE-SETTLEMENT TOP VARIES (MAX. 1167.16)

6"

FURNISH & INSTALL

2"X6" ALUMINUM STOP LOGS

AND REMOVAL TOOLS.

LOGS ARE TO BE FINISHED CUT

1" SHORTER THAN OPENING TO

FIT THE FABRICATED STOP LOG

CHANNEL.

COVER/STOP LOG STORAGE NOTES:

1. PROVIDE HALLIDAY PRODUCTS MODEL S1R3648 (OR APPROVED EQUAL) 36" x 48" ALUMINUM

ACCESS DOOR WITH LOCKING MECHANISM AND LIFTING HANDLE.

2. TOP OF STRUCTURE SHALL BE AN 8" THICK REINFORCED PRECAST TOP WITH ALUMINUM ACCESS

DOOR CAST INTO TOP.

3. PROVIDE 24" GRATE AND COLLAR (AGRI DRAIN GR24 GRATE AND GRC24 COLLAR OR APPROVED

EQUAL) FOR STOP LOG STORAGE.

4. PADLOCKS FOR ACCESS DOOR AND STOP LOG STORAGE TUBE SHALL BE KEYED ALIKE. FOUR KEYS

ARE TO BE SUPPLIED UPON PROJECT COMPLETION.

STOP LOG CHANNEL NOTES:

1. ALL STEEL SHALL BE FY=36 KSI.

2. ANCHORS SHALL BE GALVANIZED STEEL FURNISHED W/NUTS, WASHERS AND LOCK WASHERS.

3. STOP LOG CHANNEL SHALL BE FURNISHED AS ONE CONTINUOUS PIECE W/CONTINUOUS WELDS.

4. ALL STEEL STOP LOG CHANNEL COMPONENTS ARE TO BE GALVANIZED AFTER WELDING AND

DRILLING IS COMPLETE.

5. CONTRACTOR IS TO APPLY SEALANT VERY GENEROUSLY TO BACKSIDE OF STOP LOG CHANNEL TO ENSURE WATERTIGHT SEAL. SEALANT SHALL BE SIKA 30 YEAR INDUSTRIAL CAULK IN LIMESTONE

GREY OR APPROVED EQUIVALENT.

WATER CONTROL STRUCTURE NOTES:

1. STRUCTURE FABRICATION AND INSTALLATION SHALL CONFORM TO SUDAS 6010.302 SW-402

RECTANGULAR STORM SEWER MANHOLE

2. STRUCTURE SHOP DRAWINGS ARE REQUIRED FOR ENGINEER'S REVIEW AND APPROVAL BEFORE

FABRICATION OF WATER CONTROL STRUCTURE.

3. PRECAST WATER CONTROL STRUCTURE SHALL BE SUPPLED IN 2 OR 3 SECTIONS, PLUS AN 8" THICK COVER SECTION. SECTION SIZE IS LEFT TO CONTRACTOR'S DISCRETION EXCEPT BOTTOM SECTION

SHALL INCLUDE BASE AND WALLS TO 12" ABOVE INLET HOLE.

4. A CONCRETE INVERT IS TO BE INSTALLED AFTER STOP LOG CHANNEL IS INSTALLED. THE BOTTOM STOP LOG IS TO BE CAST INTO THE INVERT WITH THREE HALF INCH DIA. "J BOLTS" FASTENED TO

THE BOTTOM STOP LOG. NO LIFTING HOLES ARE REQUIRED FOR THIS BOTTOM LOG.

5. ALL SECTIONS OF THE STRUCTURE ARE TO HAVE "TONGUE AND GROOVE" JOINTS SEALED WITH O

RING GASKETS IN THE JOINT AND MASTIC AND FABRIC WRAP ON THE STRUCTURE EXTERIOR.

6. INTERIOR JOINTS SHALL BE FILLED AND SEALED TO PREVENT WATER FLOW IN JOINT BEHIND STOP

LOG CHANNEL USING EITHER CONCRETE GROUT OR MASTIC.

7. A-LOK (OR EQUIVALENT) WATERTIGHT SEALS ARE REQUIRED FOR PIPE CONNECTIONS TO THE

DRAWDOWN CONTROL STRUCTURE.

8. MANHOLE STEPS ARE TO BE INSTALLED FOR MAINTENANCE ACCESS TO THE STOP LOGS. STEPS

ARE TO BE PER SUDAS SECTION 6010-2-2.13.

9. ENSURE THAT ALL JOINTS ARE WATER-TIGHT AND PROPERLY SEALED

FL

O

W

FLOW

WELD

WELD

3"X2 1/2"X

1/4" ANGLE

6"X6"X 1/4" ANGLE

FL

O

W

PREDRILL 5/8" HOLES

FOR ANCHORS IN ANGLE

1/2"X4" GALVANIZED

ANCHORS @ 16"

SPACING STARTING

FROM TOP

SEALANT SHALL BE

APPLIED TO BACKSIDE OF

STOP LOG CHANNEL

PRIOR TO MOUNTING TO

CONCRETE STRUCTUREALL WELDS ARE TO BE

ENTIRE LENGTH OF

CHANNEL TO ENSURE

WATERTIGHTNESS

NOT TO SCALE

SW-402 WATER CONTROL OUTLET STRUCTURE SECTION

TOP OF STOP LOG

CHANNEL

TOP STOP LOG

AT/ABOVE 100-YEAR HWL

12" RCP FLOWLINE

SEE PLAN & PROFILE12" RCP FLOWLINE

SEE PLAN & PROFILE

POUR 6" CONCRETE INVERT WITH BOTTOM STOP LOG

AND STOP LOG CHANNELS CAST 3" INTO IT. SEE NOTE 4.

9" TOTAL SUMP

EXTERIOR MASTIC &

FABRIC WRAP

ALL JOINTS - 9" WIDE

NOT TO SCALE

STOP LOG & REMOVAL TOOL

DETAIL

2"X6" ALUMINUM TUBE

WITH 3/16" WALL THICKNESS

BEND 6" LOOP

AND WELD TO

PROVIDE HANDLE

1/2" ROUND

STEEL ROD

PROVIDE TWO

REMOVAL TOOLS

SUPPLY 1" DIA X 1/4"

THICK 'WASHER' WELDED

TO 1/2" STEEL ROD

LOCKING BAR

2"X2"X1/4" ANGLE 36" LONG

INSTALL 1/2" BOLT W/WELDED

NUT AS HINGE AT ONE END.

DRILL 1/2" HOLE FOR PADLOCK AT

OTHER END.

6"X1/2" EYEBOLT CAST

INTO SLAB FOR HINGE

36"X36"X4" CONCRETE

SLAB FLUSH WITH

GROUND W/ GRC24P

COLLAR CAST INTO SLAB

6 LF 24" DIA DUAL WALL

HDPE BURIED FOR STOP

LOG STORAGE TUBE

NOT TO SCALE

COVER AND STOP LOG

STORAGE DETAIL

STOP LOG CHANNEL DETAIL

24" GRATE AND COLLAR

PLACE 8" COMPACTED

ROCK TO SUPPORT TUBE

AND PROVIDE DRAINAGE

ALUMINUM ACCESS DOOR

STOP LOG CHANNEL

TOP OF STRUCTURE (SEE PLAN & PROFILE)

ALL INTERIOR JOINTS TO BE

FILLED WITH CONCRETE

GROUT OR MASTIC

2' MIN.

12" RCP

5'-0"

3' - 0"

4' - 0"

6"

1 1/4" 1/2"

1 - 1/2"

TOTAL LENGTH =

STRUCTURE TOP ELEVATION

LESS PIPE FLOWLINE ELEVATION

1' 4"

1' 8"

4'

MIN. 12"

8"

2 - 1/2" 2 - 3/4"

CONTRACTOR SHALL GROUT JOINTS

INSIDE STRUCTURE BEHIND

STOPLOG RAILS PRIOR TO

RAIL INSTALLATION

INSTALL STEPS

4' - 0"

1' 8"

TOP OF DIKE (SEE PLAN & PROFILE)

12"

3"

12" RCP

SHEET

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9B

.d w g

/1

2/

1:

:4

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

B.03

WATER CONTROL STRUCTURE DETAIL

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9C

.d w g

/1

2/

1:

:5

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

C.01

ESTIMATE QUANTITIES

Bid Item

Sub- Item Description Specification

No. Plan No. Estimated Quantities Quantity Unit

1 - Site stripping & preparation IA CS-001 A.02 1 LS 2 - Crop damage IA CS-001 0 AC 3 - Structure & channel seeding IA CS-006 K.01 1.0 AC 4 - Buffer seeding IA CS-006 K.01 7.0 AC 5 - Mobilization and demobilization IA CS-008 A.02 1 LS 6 - Drain tile investigation and removal IA CS-009 A.02 6 HR 7 - Tied Concrete Block Mat

A. Tied Concrete Block Mat IA CS-031 D.03 6608 SF B. U-Anchors IA CS-031 D.03 170 EA C. Cross Plate Percussion Anchors IA CS-031 D.03 220 EA

8 - Excavation IA CS-021 D.01 2702 CY 9 - Earthfill (General) IA CS-023 D.02 762 CY

10 - Earthfill (General Dam) IA CS-023 D.02 531 CY 11 - Earthfill (Dam Core) IA CS-023 D.02 809 CY 12 - 12" Pond Liner IA CS-023 D.01 19564 SY 13 - Drainfill, fine IA CS-024 D.02 22 CY 14 - Topsoil Strip, Salvage, and Respread IA CS-026 D.01 3868 CY 15 - Corrugated Dual-Wall HDPE

C. 8" Non-Perforated IA CS-046 M.02 40 LF D. 8" Perforated IA CS-046 M.02 440 LF E. 10" Non-Perforated IA CS-046 M.01 50 LF F. 10" Perforated IA CS-046 M.01 100 LF

16 - Reinforced Concrete Pipe A. 12" Diameter IA CS-031 M.01 108 LF

17 - Modified SW-402 Water Control Structure IA CS-031 B.03, M.01 1 EA 18 - Stoplog Storage Structure IA CS-046 B.03 1 EA 19 - Outlet Riser Structure IA CS-046 B.02, M.01 1 EA 20 - CMP tile outlets (20 LF each):

A. 10" Diameter IA CS-051 M.02 1 EA B. 12" Diameter IA CS-051 M.01 1 EA

21 - Riprap IA CS-061 D.03, M.01, M.02 48 TN 22 - Anti-Seep Collars IA CS-051 M.01 2 EA 23 - Reinforced Concrete Apron, Footing, Bar Guard IA CS-031 M.01 1 EA 24 - Corrugated Single-Wall HDPE

A. 6" Non-Perforated IA CS-046 M.02 78 LF B. 6" Perforated IA CS-046 D.01 386 LF

NORMAL POOL (1162.00)

COMPACTED POOL LINER

CHANNEL FILL

POOL EXCAVATION/EXPANSION/BORROW

PROPOSED EASEMENT BOUNDARY

LEGEND

SHEET

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9D

.d w g

/1

2/

1:

:0

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

D.01

GRADING OVERVIEWFEETSCALE

0 50 100

HORZ.

EXCAVATE TO 1161.00

EXCAVATE TO 1161.00

FILL CHANNEL TO 1159.00

FILL CHANNEL TO 1157.00

NORMAL WATER LEVEL

1162.00

COMPACT POOL LINER 10 FT

BEYOND NORMAL POOL LIMITS

SEDIMENT BASIN

EXCAVATE TO 1158.00

2:1 SIDE SLOPES

4:1 SIDE SLOPES

4:1 SIDE SLOPES

INLET CHANNEL

SEE M.02

0+00 1+00 2+00 3+00 4+00 4+50

.2

.6

.1

.7

.2

.2

.8

.0

.1

.6

.5

.3

.6

.1

.7

.9

.7

.7

.0

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

25 FT

AUXILIARY

SPILLWAY

1164.8048 FT

PRIMARY SPILLWAY

TCBM CHUTE

1162.00

ELEV: 1167.16

ELEV: 1166.90 ELEV: 1166.76 ELEV: 1166.60

NWL = 1162.00

TOP OF EMBANKMENT

DESIGN ELEVATION = 1166.50

BOTTOM OF CORE TRENCH

SEE DAM CORE NOTES

TOP OF DAM CORE = 1162.00

EXISTING GROUND

REQUIRED OVERBUILD LINE

5% OF FILL HEIGHT

REQUIRED OVERBUILD LINE

5% OF FILL HEIGHT

TEE INTO DRAWDOWN PIPE DAYLIGHT TOE DRAIN

8 LF 12" RCP

12" APRON, FOOTING, BAR GUARD

SEE B.02 FOR EMBANKMENT AND

TOE DRAIN CROSS SECTIONS

APPROXIMATE BEDROCK PROFILE

127' - 6" HDPE @ 2.23%

TOE DRAIN 127 LF

6" PERF SINGLE WALL CPDT

@ 2.23%

76' - 6" HDPE @ 5.93%

TOE DRAIN 76 LF

6" PERF

SINGLE WALL CPDT

@ 5.93%

11' - 6" HDPE @ 5.67%

TOE DRAIN 11 LF

6" PERF

SINGLE WALL CPDT

@ 5.67%

EMBANKMENT

WATER CONTROL STRUCTURE

3:1 SIDE SLOPES

0+00 1+00 2+00 3+00 4+00 4+50

BP

: 0

+0 0.

EP

: 4

+5 0.

TEE INTO

DRAWDOWN PIPE

115511

115511

117011

117511

TOE DRAIN TOE DRAIN

NORMAL POOL (1162.00)

DEEP WATER AREA (<1159.00)

100-YEAR HWL

PROPOSED EASEMENT BOUNDARY

EXCAVATE TO 1161.00

LEGEND

SHEET

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9C

1.

dw g

/1

2/

1:

:1

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

R

FEETSCALE

0 25 50

HORZ.

FEETSCALE

0 5 10

VERT. D.02

PLAN & PROFILE - EMBANKMENT

BOTTOM OF CORE TRENCH

DAM CORE NOTES

1. DAM CORE SHALL BE EXCAVATED TO THE DEPTH OF THE

BEDROCK OR 7 FEET, WHICHEVER IS SHALLOWER.

2. WHERE BEDROCK IS ENCOUNTERED WITHIN THE CORE TRENCH,

IT SHALL BE SCRAPED TO REMOVE AS MUCH LOOSE ROCK AS

REASONABLE.

3. DAM CORE SHALL BE CONSTRUCTED OF GOOD, COHESIVE

MATERIAL WITH THE HIGHEST CLAY CONTENT AVAILABLE

ON-SITE.

4. DAM CORE SHALL BE PLACED IN 6" LIFTS AND FOLLOW THE

COMPACTION METHOD LISTED IN SPECIFICATION IA CS-023.

0+00 1+00 1+50

BP

: 0

+0 0.

EP

: 1

+5 0.

11551155

65 TOP OF EMBANKMENT

DESIGN ELEV. = 1166.50

0+00 1+00 1+50

.2

.5

.1

.5

.5

.0

.4

.2

.5

.1

.5

.5

.0

.4

1161.00

1161.00 1162.00

1162.00

1151.50 1151.50

1153.00

10' OUTLET CHUTE CREST

NWL

WAVE BERM

TOP OF BERM

RIP RAP 1.5 FT DEPTH (30 TN)

UNDERLAY WITH GEOTEXTILE FABRIC

STILLING BASIN

END TCBM (TERMINATION TRENCH)

BEGIN TCBM

(TERMINATION TRENCH)

10' 0%

20%

0%

-20%

0% 33

DAM CORE

MINIMUM EXTENTS

OUTLET CHUTE

20'

9' 10'

10' 10'

8' 8'

20'

80'

70'

90'

10'

(TYP)

10' 15'

NORMAL POOL (1162.00)

DEEP WATER AREA (<1159.00)

100-YEAR HWL

PROPOSED EASEMENT BOUNDARY

EXCAVATE TO 1161.00

LEGEND

SHEET

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9C

1.

dw g

/1

2/

1:

:2

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

FEETSCALE

0 25 50

HORZ.

FEETSCALE

0 5 10

VERT. D.03

PLAN & PROFILE - CHUTE

ADDITIONAL NOTES

1. SEED BEFORE PLACING TCBM

2. USE SEAM TYPES AS SPECIFIED BY MANUFACTURER.

3. 6080 SF TOTAL FLEXAMAT

4. 220 CROSS PLATE PERCUSSION ANCHORS

5. 170 U ANCHORS

6. CONTRACTOR IS RESPONSIBLE FOR VERIFYING ALL ROLL SIZES AND

QUANTITIES.

7. ENGINEER AND MANUFACTURER'S REPRESENTATIVE SHALL BE ON-SITE FOR

FLEXAMAT INSTALLATION.

R

R

FEETSCALE

0 10 20

HORZ.

RIP RAP

CHUTE CROSS SECTION

48 FT CHUTE WIDTH

3:1 SIDE SLOPES

EMBANKMENT SURFACE

EXTEND TCBM

7 FT UP CHUTE SIDE

TCBM

CUT OPENING IN FLEXAMAT

GROUT AROUND APRON

10'x74' WITH RIGHT EXTENSIONS

16'x74'

10'x74' WITH RIGHT EXTENSIONS

10'x74' WITH RIGHT EXTENSIONS

10'x74' WITH RIGHT EXTENSIONS

10'x74' WITH RIGHT EXTENSIONS

10'x23' WITH RIGHT EXTENSIONS

10'x23' WITH RIGHT EXTENSIONS

10'x23' WITH RIGHT EXTENSIONS

10'x23' WITH RIGHT EXTENSIONS

10'x23' WITH RIGHT EXTENSIONS

10'x23' WITH RIGHT EXTENSIONS

10'x23' WITH RIGHT EXTENSIONS

10'x23'

TCBM NOTES:

1. PROVIDE GEOGRID AND TRM EXTENSIONS ON SPECIFIED ROLLS. INSTALL

ADJACENT MAT OVER EXTENSIONS AND SECURE WITH U ANCHORS AT 2'

INCREMENTS.

2. 18" VERTICAL ANCHOR TRENCH, BACKFILL WITH COHESIVE SOILS AND

COMPACT FIRMLY

3. 18" VERTICAL ANCHOR TRENCH, BACKFILL WITH COHESIVE SOILS AND

COMPACT FIRMLY. ABUT 10x33' ROLLS TO BACK SIDE OF ANCHOR TRENCH

AND SECURE WITH U ANCHORS IN 2' INCREMENTS

4. EXTEND FLEXAMAT A MINIMUM OF 18" UNDER RIP RAP; FLEXAMAT SHALL GO

ON TOP OF FABRIC AND UNDER RIP RAP

5. 1-FOOT DOWNTURN: RECESS THE OUTSIDE 2 BLOCKS INTO THE SLOPE AT A

45° ANGLE.

ANCHORING NOTES:

1. INSTALL CROSS PLATE PERCUSSION ANCHORS (CPAs) IN DIAMOND PATTERN

ON SPILLWAY SLOPE. FOR EACH 10' ROLL, INSTALL 2 ANCHORS BEHIND

LEADING EDGE OF ANCHOR TRENCH, 2' FROM EACH EDGE OF THE MAT. 3 FEET

DOWN THE SLOPE, PLACE 1 ANCHOR IN THE MIDDLE OF THE MAT (3 FEET

LATERALLY FROM EACH OF THE FIRST TWO ANCHORS). CIRCLES IN PLAN VIEW

REPRESENT CPA PLACEMENT

2. INSTALL U ANCHORS AS NOTED FOR SEAMS

NOTE 1

(TYP)

NOTE 1 (TYP)

N O

TE 2 N

O

TE 3

N O

TE 4

CUT OPENING IN FLEXAMAT

GROUT AROUND PIPE

NOTE 5

NOTE 5

CROSS PLATE

PERCUSSION

ANCHOR

LOCATION (TYP)

1-FOOT DOWNTURN

(NOTE 5)1-FOOT DOWNTURN

(NOTE 5)

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

.8

.7

.6

.5

.5

.8

.2

.6

.0

.3

.2

.8

.7

.6

.5

.5

.8

.2

.6

.0

.3

.2

-25.00%

0.00%

FILLED CHANNEL

NWL = 1162.00

DEEP WATER (>3 FT)

TOP OF DIVERSION BERM = 1161.50

EXISTING GROUND SURFACE

SEE B.02 FOR BERM CROSS SECTION

DIVERSION BERM 1

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

BP

: 0

+0 0.

EP

: 2

+5 0.

60 11

0+00 1+00 1+50

.5

.8

.3

.4

.6

.4

.1

.5

.8

.3

.4

.6

.4

.1

4% 0% -2%

STA: 0+14.89

EL: 1164.00

STA: 0+35.00

EL: 1164.80

STA: 0+60.00

EL: 1164.80

ST

A:

+3

2.

EL

: 1

3.

P2

AUX SPILLWAY

CREST = 1164.80

TOP OF EMBANKMENT

SEE B.02 FOR SPILLWAY CROSS SECTION

AUXILIARY SPILLWAY

EXISTING GROUND

0+

1+00

1+50

BP: 0+00.00 EP: 1+50.00

PC: 0+22.17

PC

: 0

+5 9.

15PT

: 0

+3 7.

88 PT: 0+83.98

TOE DRAIN

TOP OF EMBANKMENT

DESIGN ELEV. = 1166.50

NORMAL POOL (1162.00)

DEEP WATER AREA (<1159.00)

100-YEAR HWL

PROPOSED EASEMENT BOUNDARY

EXCAVATE TO 1161.00

LEGEND

SHEET

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9C

1.

dw g

/1

2/

1:

:2

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

R

FEETSCALE

0 25 50

HORZ.

FEETSCALE

0 5 10

VERT. D.04

PLAN & PROFILE - AUX SPILLWAY & DIVERSION BERM 1

R

25 FT BOTTOM

3:1 SIDES

TOP OF EMBANKMENT

EXISTING

GROUND

AUXILIARY SPILLWAY SECTION THROUGH EMBANKMENT

SPILLWAY CREST

ELEV = 1164.80

0+00 1+00 2+00

.7

.6

.2

.5

.5

.4

.8

.8

.4

.7

.6

.2

.5

.5

.4

.8

.8

.4

-25.00%

0.00%

FILLED CHANNEL

NWL = 1162.00

TOP OF DIVERSION BERM = 1161.50

EXISTING GROUND SURFACE

DIVERSION BERM 2

0+00 1+00 2+00

BP

: 0

+0 0.

EP

: 2

+0 0.

65 11

0+00 1+00

1+75

BP

: 0

+0 0.

EP

: 1

+7 5.

0+00 1+00 1+75

.4

.7

.6

.9

.0

.0

.1

.7

.4

.7

.6

.9

.0

.0

.1

.7

-25.00%25 .00

% 0.00%

EXCAVATED WETLAND SURFACE

FILLED CHANNEL

NWL = 1162.00

TOP OF DIVERSION

BERM = 1161.50

EXISTING GROUND SURFACE

DIVERSION BERM 3

NORMAL POOL (1162.00)

DEEP WATER AREA (<1159.00)

100-YEAR HWL

PROPOSED EASEMENT BOUNDARY

EXCAVATE TO 1161.00

LEGEND

SHEET

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9C

1.

dw g

/1

2/

1:

:3

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

R

FEETSCALE

0 25 50

HORZ.

FEETSCALE

0 5 10

VERT. D.05

PLAN & PROFILE - DIVERSION BERM 2 & 3

R

TIL

E

IN

V=

.7

>> TIL

E

IN

V=

.5

ANY ADDITIONAL DISTURBED AREAS

BUFFER SEEDING

SEED WAVE BERM WITH STRUCTURE SEEDING

SEED BERM AND SIDES WITH STRUCTURE SEEDING

AUXILIARY SPILLWAY AND SURRONDING AREA

STRUCTURE SEEDING

DISTURBED AREA TO 1 FT

BELOW NORMAL PO0L

BUFFER SEEDING

DO NOT SEED POOL

OR DIVERSION BERMS

DO NOT SEED EXISTING CRP

AREA UNLESS DISTURBED

NORMAL POOL (1162.00)

DEEP WATER AREA (<1159.00)

100-YEAR HWL

PROPOSED EASEMENT BOUNDARY

EXCAVATE TO 1161.00

RIP-RAP

STRUCTURE SEEDING

BUFFER SEEDING

LEGEND

SHEET

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9K

.d w g

/1

2/

1:

:4

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

K.01

SEEDING PLANFEETSCALE

0 60 120

HORZ.

R

SEED CHUTE WITH STRUCTURE SEEDING

PRIOR TO PLACING TCBM

-0.59%

ST

A:

+2

0.

EL

: 1

4.

ST

A:

+9

0.

EL

: 1

3.

150' - 12" HDPE @ 0.59%

150 LF - 10" DUAL-WALL HDPE

@ 0.59% 7020

0+00 1+00 2+00 3+00 3+12

.3

.7

.0

.8

.6

.4

.6

.7

.6

.6

.5

.9

.1

.1

.3

.6

.0

.8

.6

.4

.6

.6

.6

.5

.5

.9

.0

.1

ST

A

0+

CO

N

N

EC

T

TO

E

XI

ST

IN

G 8"

T

IL

E M

AT

CH

C

RO

W N

S

FL

IN

4.

(6 " W

FL

O U

T

.0

(1 2"

S E)

ST

A

0+

AL

IG

N M

EN

T

TU

RN

FL

IN

3.

(1

2" N

W

FL

O

U T

.8

(1

2" E

ST

A

1+

TI

LE

O U

TL

ET

L

F

" C M

P

FL

IN

3.

(1 2"

W

COVER BERM

PROVIDE MIN. 3 FT COVER

INLET CHANNEL

ELEVATION = 1162

20 LF 12" CMP TILE OUTLET

50 LF

NON-PERF100 LF PERFORATED

TILE

INV=1160.52

0+00

1+00

2+00

3+00 3+12.33

BP

: 0

+0 0.0

PI:

0+

.41

EP

: 3

+1 2.

0+00 1+00 1+50

-1.00% -2.58%

STA: 0+25.00

EL: 1155.92

STA: 0+67.30

EL: 1155.50

STA: 1+25.55

EL: 1154.00

TEE IN 6" TOE DRAIN

42' - 12" RCP @ 1.18%

42 LF - 12"

GASKETED RCP

@ 1.18% 6725

58' - 12" RCP @ 2.58%

58 LF - 12"

GASKETED RCP

@ 2.58% 2667

ST

-1

(S

TA

+2

5) O

U

TL

ET

R

IS

ER

S

TR

U

CT

U

RE

(S

EE

B .0

2)

TO

P

.5

FL

O

U T

.0

(1

2" N

ST

-2

(S

TA

+6

7) W

AT

ER

C O

N

TR

O L

ST

RU

CT

U

RE

M

O

DI

FI

ED

S W

-4

(S

EE

B .0

3)

TO

P

.5

FL

IN

5.

(1

2" S

FL

O U

T

.5

(1 2"

N E)

ST

A

1+

CO

N

CR

ET

E

AP

RO

N

, F O

O

TI

N G, BA

R

GU

AR

D

TI

E

JO

IN

TS

FL

IN

4.

(1 2"

S W

10 FT WAVE BERM

EMBANKMENT SURFACE

STILLING

BASIN

NWL

TOP OF EMBANKMENT

1166.50

6'x6' ANTI-SEEP

COLLARS (2)

TIE FINAL THREE

PIPE JOINTS

0+00

1+00

1+50

BP

: 0

+0 0.

PI

: 0

+6 7.

EP

: 1

+5 0.

SHEET

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9M

.d w g

/1

2/

1:

:5

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

R

FEETSCALE

0 25 50

HORZ.

FEETSCALE

0 5 10

VERT. M.01

DRAWDOWN PIPE AND SOUTH RE-LAY

10 FT BOTTOM

4:1 SIDES

EXISTING

GROUND

INLET CHANNEL CROSS SECTION

10 FT TOP

4:1 SIDES

EXISTING

GROUND

COVER BERM CROSS SECTION

PROPOSED PIPE

MIN. 3 FT COVER

R

100 LF 6" PERFORATED DRAIN TILE

8"x6" TEE

REMOVE EXISTING 10" TILE

NOTE: TILE RE-LAYS SHALL INCLUDE PERFORATED PIPE

IN AREAS OUTSIDE OF EASEMENT BOUNDARY, AND

NON-PERFORATED PIPE INSIDE EASEMENT BOUNDARY.

CUT OPENING IN FLEXAMAT

GROUT AROUND APRON

9 TN RIP RAP

-0.20%

ST

A:

+2

0.

EL

: 1

4.

ST

A:

+1

9.

EL

: 1

3.

ST

A

0+

CO

N

N

EC

T

TO

E

XI

ST

IN

G 6"

C

PD

T M

AT

CH

C

RO

W N

S

FL

IN

4.

(6 " N

W

FL

O

U T

.0

(8

" S

ST

A

1+

AL

IG

N M

EN

T

TU

RN

FL

IN

3.

(8

" N W

FL

O U

T

.7

(8 " S

E)

ST

A

5+

TI

LE

O U

TL

ET

L

F

" C M

P

FL

IN

3.

(8 " W

ST

A

0+

AL

IG

N M

EN

T

TU

RN

FL

IN

3.

(8

" N

FL

O

U T

.9

(8

" S E)

ST

A

4+

AL

IG

N M

EN

T

TU

RN

FL

IN

3.

(8

" N W

FL

O U

T

.1

(8 " E

480' - 8" HDPE @ 0.20%

480 LF - 8" DUAL-WALL HDPE

@ 0.20% 0020

0+00 1+00 2+00 3+00 4+00 5+00 5+47

.6

.4

.1

.2

.9

.7

.5

.1

.1

.9

.8

.1

.3

.3

.2

.6

.7

.2

.9

.3

.5

.3

.4

.9

.9

.8

.8

.7

.7

.6

.6

.5

.5

.4

.4

.3

.3

.2

.2

.1

.1

.0

.0

20 LF 10" CMP TILE OUTLET

40 LF

NON-PERF440 LF PERFORATED

TILE

INV=1158.76

0+00

1+00

2+00

3+00

4+00 5+00

5+47.38

BP: 0+00.00

PI: 0+53.03

PI

: 1

+2 9.

PI

: 4

+5 6.

EP

: 5

+4 7.

SHEET

B ol to n

M en k, In c.

5, A ll Ri gh ts

R es er ve d c h:

\I

DA

LS

\0 t7

\C

AD

\C 3D

\1

9M

.d w g

/1

2/

1:

:0

AM

DESIGNED

DRAWN

CHECKED

CLIENT PROJ. NO.

DATEDESCRIPTION REV IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

IDALS PROJ. NO. WINN981024D

BCS

BCS

JPR

0T7.134539

1.1 ADDRESS IDALS COMMENTS 09/26/2025

1.2 BID PLANS 11/12/2025

1519 BALTIMORE DRIVE

AMES, IA 50010

Phone: (515) 233-6100 Email: Ames@bolton-menk.com www.bolton-menk.comR

R

FEETSCALE

0 25 50

HORZ.

FEETSCALE

0 5 10

VERT. M.02

NORTH TILE RE-LAY

72 LF 6" PERFORATED DRAIN TILE

8"x6" TEE

78 LF 6" NON-PERFORATED DRAIN TILE

REMOVE EXISTING 6" TILE

NOTE: TILE RE-LAYS SHALL INCLUDE PERFORATED PIPE

IN AREAS OUTSIDE OF EASEMENT BOUNDARY, AND

NON-PERFORATED PIPE INSIDE EASEMENT BOUNDARY.

9 TN RIP RAP