Attachment C - Final Plans Polk Stream ARA 9.pdf

SECTION 23

BEAVER

TOWNSHIP

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Project No. 0143-0009

CONSTRUCTION PLANS FOR

POLK COUNTY PUBLIC WORKS

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY, IA

MAY 2025

LOCATION MAP

VICINITY MAP

HEI NO. 0143-0009

100 COURT AVENUE

SUITE 202

DES MOINES, IA 50309

P: 515.444.5393 www.houstoneng.com

THE UNDERGROUND UTILITIES SHOWN HAVE BEEN LOCATED FROM

FIELD SURVEY INFORMATION, AS-BUILT MAPS AS PROVIDED BY

MUNICIPALITIES OR UTILITY COMPANIES, AND/OR EXISTING

DRAWINGS. THERE IS NO GUARANTEE THAT THE UNDERGROUND

UTILITIES SHOWN INDICATE ALL SUCH UTILITIES IN THE AREA, EITHER IN

SERVICE OR ABANDONED. NOR IS THERE A GUARANTEE THAT THE

UNDERGROUND UTILITIES SHOWN ARE IN THE EXACT LOCATION

INDICATED. THE CONTRACTOR SHALL DETERMINE THE EXACT

LOCATION OF ALL EXISTING UTILITIES. THE CONTRACTOR AGREES TO

BE FULLY RESPONSIBLE FOR ANY AND ALL DAMAGES WHICH MAY

RESULT FROM THEIR FAILURE TO EXACTLY LOCATE AND PRESERVE ANY

AND ALL UTILITIES.

GOVERNING SPECIFICATIONS:

STANDARD SPECIFICATIONS FOR CONSTRUCTION ADOPTED BY THE

IOWA DEPARTMENT OF TRANSPORTATION AND SUDAS, STANDARD

DRAWINGS CURRENTLY IN EFFECT AND OTHER CONTRACT PROVISIONS

SUBMITTED HEREIN:

UTILITY NOTE:

PROJECT

LOCATION

I-80

ALTOONA

AREA OF WORK

NE 46TH AVE

MITCHELLVILLE

N E

8T

H S

T

THOMAS MITCHELL

PARK

US-163

SHEET INDEX

A.1 COVER SHEET

A.2 NOTES AND QUANTITIES

A.3 SITE PLAN

B.1 CAMP CREEK SOUTH PLAN AND PROFILE (1 OF 4)

B.2 CAMP CREEK SOUTH PLAN AND PROFILE (2 OF 4)

B.3 CAMP CREEK SOUTH PLAN AND PROFILE (3 OF 4)

B.4 CAMP CREEK SOUTH PLAN AND PROFILE (4 OF 4)

B.5 CAMP CREEK NORTH PLAN AND PROFILE (1 OF 2)

B.6 CAMP CREEK NORTH PLAN AND PROFILE (2 OF 2)

B.7 TRIBUTARY PLAN AND PROFILE (1 OF 2)

B.8 TRIBUTARY PLAN AND PROFILE (2 OF 2)

B.9 STOCKPILE MAP

B.10 CAMP CREEK SOUTH CROSS SECTIONS (1 OF 7)

B.11 CAMP CREEK SOUTH CROSS SECTIONS (2 OF 7)

B.12 CAMP CREEK SOUTH CROSS SECTIONS (3 OF 7)

B.13 CAMP CREEK SOUTH CROSS SECTIONS (4 OF 7)

B.14 CAMP CREEK NORTH CROSS SECTIONS (5 OF 7)

B.15 TRIBUTARY CROSS SECTIONS (6 OF 7)

B.16 TRIBUTARY CROSS SECTIONS (7 OF 7)

B.100 DETAILS (1 OF 5)

B.101 DETAILS (2 OF 5)

B.102 DETAILS (3 OF 5)

B.103 DETAILS (4 OF 5)

B.104 DETAILS (5 OF 5)

C.1 CAMP CREEK SOUTH PLANTING PLAN (1 OF 4)

C.2 CAMP CREEK SOUTH PLANTING PLAN (2 OF 4)

C.3 CAMP CREEK SOUTH PLANTING PLAN (3 OF 4)

C.4 CAMP CREEK SOUTH PLANTING PLAN (4 OF 4)

C.5 CAMP CREEK NORTH PLANTING PLAN (1 OF 2)

C.6 CAMP CREEK NORTH PLANTING PLAN (2 OF 2)

C.7 TRIBUTARY PLANTING PLAN (1 OF 2)

C.8 TRIBUTARY PLANTING PLAN (2 OF 2)

C.100 PLANTING DETAILS

S.1 SWPP SITE PLAN

S.2 CAMP CREEK SOUTH SWPP PLAN (1 OF 4)

S.3 CAMP CREEK SOUTH SWPP PLAN (2 OF 4)

S.4 CAMP CREEK SOUTH SWPP PLAN (3 OF 4)

S.5 CAMP CREEK SOUTH SWPP PLAN (4 OF 4)

S.6 CAMP CREEK NORTH SWPP PLAN

S.7 TRIBUTARY SWPP PLAN

S.100 SWPPP DETAILS

T.1 TRAFFIC PLAN

NE DEVOTIE DR

1. ALL COORDINATES LISTED IN THE PLAN ARE NAD83 IOWA RCS

ZONE 8, US FOOT

2. VERTICAL DATUM: NAVD 1988

HORIZONTAL AND VERTICAL CONTROLS:

NE 46TH AVE

N

E 108TH

ST

12/31/2025

ALL SHEETS

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.

CHARLES IKENBERRY DATE

LICENSE NO: 22051

MY LICENSE RENEWAL DATE IS:

PAGES OR SHEETS COVERED BY THIS SEAL:

05/13/2025

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.

TED RUD DATE

LICENSE NO: 29069

MY LICENSE RENEWAL DATE IS:

PAGES OR SHEETS COVERED BY THIS SEAL:

TED

RUD

29069

ALL SHEETS

12/31/2025

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ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

HEI NO. 0143-0009

A.2

NOTES AND QUANTITIES

GENERAL NOTES:

1. THE LOCATIONS OF ALL AERIAL AND UNDERGROUND UTILITY FACILITIES

ARE APPROXIMATE OR MAY NOT BE INDICATED IN THESE PLANS.

UNDERGROUND FACILITIES, WHETHER INDICATED OR NOT, SHALL BE

LOCATED AND FLAGGED BY THE CONTRACTOR AND UTILITY COMPANIES 48

HOURS BEFORE WORK IS STARTED. VERIFY UTILITY LOCATIONS BY

CONTACTING THE IOWA ONE CALL (ONLINE AT WWW.IOWAONECALL.COM

AND/OR CALL 811). THE CONTRACTOR SHALL BE REQUIRED TO NOTIFY AND

COORDINATE ALL NECESSARY UTILITY SERVICE INTERRUPTIONS WITH THE

OWNERS. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR TO

PROTECT ALL EXISTING UTILITIES, PAVEMENT, STRUCTURES, FENCES,

POLES, SIGNS, TREES, IRRIGATION LINES, SPRINKLER HEADS, SUB- DRAINS

AND OTHER IMPROVEMENTS NOT DESIGNATED FOR REMOVAL. ANY

DAMAGE CAUSED BY THE CONTRACTOR'S OPERATIONS SHALL BE REPAIRED

BY THE CONTRACTOR AT THE CONTRACTOR'S EXPENSE.

2. CONTOURS SHOWN ON THE PLANS ARE 1 FT CONTOURS FROM SURVEYED

LIDAR BY HEI (APRIL 2024). ELEVATIONS CALLED OUT ON THE PLANS ARE

REFERENCED TO NAVD 88 VERTICAL DATUM. HORIZONTAL CONTROL IS

NAD83 IOWA RCS ZONE 8.

3. THE CONTRACTOR SHALL CONDUCT ALL OPERATIONS AND MAINTAIN

CONSTRUCTION WORK AREA IN A SAFE MANNER IN ACCORDANCE WITH

OSHA COMPLIANCE.

4. CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLING ALL TEMPORARY

MARKERS, LIGHTS, SIGNS, FLAGMEN, BARRICADES AND OTHER PROTECTIVE

DEVICES TO PROVIDE ADEQUATE TRAFFIC CONTROL. THIS SHALL INCLUDE

ANY BARRICADES OR SIGNS NECESSARY FOR PEDESTRIAN TRAIL CLOSURE.

5. ELECTRONIC GRADING FILES AND EXISTING UTILITIES AND WETLANDS CAN

BE PROVIDED BY ENGINEER UPON REQUEST.

6. CONTRACTOR IS RESPONSIBLE FOR REPAIRING DAMAGE TO ROADS,

SIDEWALKS, AND TRAILS USED AS ACCESS ROUTES. CONDITIONS PRIOR TO

CONSTRUCTION TO BE DOCUMENTED BY THE CONTRACTOR AND MUST BE

RESTORED TO ORIGINAL CONDITIONS OR BETTER BY SMOOTHING

COMPACTED SOILS PRIOR TO FINISHED GRADING AND SEEDING WITH

SPECIFIED MIX AND METHODS.

7. ACCESS ROUTES IDENTIFIED TO EACH SITE MUST BE STRICTLY ABIDED TO.

CONTRACTOR MAY PROPOSE ALTERNATE ROUTES FOR APPROVAL BY FIELD

ENGINEER PRIOR TO MOBILIZATION.

8. THE QUANTITIES SHOWN FOR SEEDING INCLUDE ALL AREA SHOWN ON THE

C SHEETS AND DO NOT ACCOUNT FOR ANY AREA THAT IS DISTURBED

OUTSIDE OF THESE AREAS OR THE LIMITS OF CONSTRUCTION. DISTURBED

AREAS OUTSIDE THESE AREAS AND THE LIMITS OF CONSTRUCTION MUST

BE RESTORED, SEEDED, AND MULCHED AND WILL BE CONSIDERED

INCIDENTAL TO THE PROJECT. COUNTY WILL PROVIDE NATIVE SEED MIX

FOR CONTRACTOR'S HYDRAULIC SEEDING OF MESIC PRAIRIE AND RIPARIAN

AREAS. CONTRACTOR WILL PROVIDE TURF GRASS AND TEMPORARY SEED

MIXES PER SPECIFICATION.

9. CONTRACTOR TO HAUL OFF-SITE AND DISPOSE OF EXCESS EXCAVATED

MATERIAL. EXCESS MATERIAL FROM EXCAVATION SHALL BECOME

PROPERTY OF THE CONTRACTOR AND SHALL BE PROPERLY DISPOSED OF

OFF SITE.

10. CLEARING AND GRUBBING TO BE PERFORMED ONLY IN LOCATIONS

NECESSARY TO CONSTRUCT AND ACCESS THE SITE. CONTRACTOR SHALL

CLEAR ALL DEBRIS WITHIN STREAM INSIDE OF THE LIMITS OF

CONSTRUCTION. CLEARING AND GRUBBING MATERIAL MUST BE HAULED

OFFSITE.

11. PROTECT BY WHATEVER MEANS REQUIRED ALL FENCES, SIGNS,

STRUCTURES, DRIVES, SIDEWALKS, STREETS, BUSHES, TREES, ETC.

SHOWN TO REMAIN OUTSIDE OR INSIDE THE LIMITS OF CONSTRUCTION.

12. THE OWNER SHALL RESERVE THE RIGHT TO SALVAGE ANY MATERIALS.

13. REPAIR OR REPLACE ITEMS THAT ARE DAMAGED AS A RESULT OF

DEMOLITION OR CONSTRUCTION TO MATCH OR IMPROVE EXISTING

CONDITIONS.

14. CONTRACTOR TO ATTEND THE PRE-CONSTRUCTION CONFERENCE WITH

OWNER, ENGINEER, AND OTHER PROJECT STAKEHOLDERS.

15. RAMPS AND HAUL ROUTES THAT THE CONTRACTOR CONSTRUCTS FOR

HAULING MATERIAL AND TRANSPORTING EQUIPMENT SHALL BE

CONSIDERED INCIDENTAL TO MOBILIZATION.

16. HEI WILL PROVIDE TEMPORARY CONTROL POINTS AS SHOWN ON SHEET A.3.

CONTRACTOR IS RESPONSIBLE FOR ALL SURVEY AND STAKING

REQUIREMENTS. GPS FILES ARE AVAILABLE UPON REQUEST.

17. WITH APPROVAL FROM PROJECT REPRESENTATIVE, TOEWOOD MAY BE

USED IN LIEU OF ROOTWADS OR ROOTWADS MAY BE USED IN LIEU OF

TOEWOOD TO STABILIZE BANK DEPENDING ON MATERIALS HARVESTED

FROM SITE. TREES FOR TOEWOOD AND ROOTWADS HAVE ALREADY BEEN

STOCKPILED FOR USE (SEE SHEET B.9 FOR STOCKPILE LOCATIONS).

18. DEVOTIE DRIVE BRIDGE WILL BE UNDER CONSTRUCTION CONCURRENT

WITH THE PROJECT. CONTRACTORS WILL COORDINATE TO MINIMIZE

CONFLICTS. THE SEQUENCE PLAN WILL BE DISCUSSED AT

PRE-CONSTRUCTION MEETING.

19. ELECTED CONTRACTOR WILL BE REQUIRED TO SUBMIT A WATER HANDLING

PLAN FOR APPROVAL PRIOR TO COMMENCING WORK FOR DISCUSSION AT

PRE-CONSTRUCTION MEETING.

20. ALL ROLLED EROSION CONTROL PRODUCTS SHALL USE NATURAL FIBERS.

21. NO TREE CLEARING PERMITTED BETWEEN MARCH 31 AND OCTOBER 15.

TREES IN WORK AREAS HAVE ALREADY BEEN REMOVED OR CUT FLUSH

ALONG THE STREAMBANKS, LEAVING ROOTWADS AND STUMPS.

EXCAVATION ALONG BANKS MAY REQUIRE ROOTWAD OR STUMP REMOVAL.

THIS WILL BE INCIDENTAL TO THE CLEARING AND GRUBBING LINE ITEM. DO

NOT REMOVE ANY TREES WITHOUT APPROVAL OF FIELD ENGINEER.

22. CONTRACTOR MUST DEVELOP ALL DOCUMENTATION REQUIRED TO APPLY

FOR AND OBTAIN THE NPDES PERMIT GRANTED BY IOWA DEPARTMENT OF

NATURAL RESOURCES. CONTRACTOR MUST ADHERE TO THE

REQUIREMENTS OF THE NPDES PERMIT AND SWPPP (SHEET S.1).

CONTRACTOR TO IMPLEMENT COVER CROP AND/OR PERMANENT SEEDING

WITH HYDROMULCH WITH BONDED FIBER MATRIX (BFM) ON ALL DISTURBED

AREAS IMMEDIATELY UPON COMPLETION OF GRADING OPERATIONS AT SITE

IN ACCORDANCE WITH PROJECT SPECIFICATIONS AND IN COORDINATION

WITH RPR. COVER CROP MIX WILL COMPLY WITH IOWA DOT 9010.09 TYPE 4

URBAN TEMPORARY EROSION CONTROL MIXTURE

23. CONTRACTOR MUST ADHERE TO THE REQUIREMENTS OF THE 404 PERMIT

GRANTED BY THE UNITED STATES ARMY CORPS OF ENGINEERS FOR THIS

PROJECT. A COPY OF THE REQUIREMENTS WILL BE PROVIDED TO THE

SELECTED CONTRACTOR, OR UPON REQUEST.

24. DELINEATED WETLANDS ARE SHOWN ON THE PLANS. CONTRACTOR SHALL

LIMIT ALL CONSTRUCTION ACTIVITIES FROM ENCROACHING UPON WETLAND

AREAS, EXCEPT LOCATIONS SPECIFICALLY DESIGNATED IN THE

CONSTRUCTION DRAWINGS. WETLAND AREAS THAT ARE TEMPORARILY

DISTURBED DUE TO CONSTRUCTION ACTIVITIES SHALL BE RESTORED AND

RESEEDED WITH THE RIPARIAN SEEDING MIX AS DETAILED IN THE PROJECT

SPECIFICATIONS.

25. CONTRACTOR SHALL AVOID AND PROTECT ENVIRONMENTALLY SENSITIVE

AREAS.

26. CONTRACTOR MUST USE GREAT CAUTION TO NOT DAMAGE VALUABLE

TREES THAT ARE BEING KEPT IN THE PROJECT AREA (MARKED BY PAINT). IF

ANY TREE IS DAMAGED, THE CONSERVATION ECOLOGIST WILL DETERMINE

THE VALUE OF THE DAMAGED TREE USING THE NATIONAL TREE BENEFIT

CALCULATOR (ARBOR DAY FOUNDATION). ASSESSED DAMAGE WILL FALL

INTO THREE CATEGORIES, AND BE REIMBURSED TO PCC IN THE FOLLOWING

AMOUNTS:

LIGHT DAMAGE - 20% OF TREE VALUE

MODERATE DAMAGE - 50% OF TREE VALUE

EXTREME DAMAGE - 100% OF TREE VALUE

CONTROL POINTS:

ABBREVIATIONS:LEGEND:

EXISTING CONTOUR MINOR

EXISTING CONTOUR MAJOR

EXISTING STREAM CENTERLINE

PROPERTY BOUNDARY LINE

GAS UTILITY LINE

OVERHEAD POWER UTILITY LINE

UNDERGROUND POWER UTILITY LINE

STORM SEWER LINE

SANITARY SEWER LINE

OVERHEAD COMMUNICATIONS LINE

UNDERGROUND COMMUNICATIONS

FIBER OPTIC LINE

WATER MAIN LINE

LIMITS OF CONSTRUCTION

STRAW WATTLE

SILT FENCE

FLOATATION SILT CURTAIN

SAFETY FENCE

WETLAND

G

OHP

FO FO

UGE

STS STS

STS STS

OHP

UGC

W W

BIO BIO BIO

ROCK RIPRAP

GRAVEL

FINISH GRADE - CUT

FINISH GRADE - FILL

STAGING AREA

EROSION CONTROL MATTING

RIPARIAN SEED MIX

MESIC PRAIRIE SEED MIX

TREE - DO NOT DISTURB

REMOVE DEBRIS

CONSTRUCTION EXIT

EXISTING MANHOLE

TEMPORARY STREAM CROSSING

XX XX XX

PERMITTING NOTES:

QUANTITIES:

S S S

AC - ACRES

BF - BANKFULL

BFM - BONDED FIBER MATRIX

CL - CENTERLINE

CMP - CORRUGATED METAL PIPE

CMPA - CORRUGATED METAL PIPE ARCH

CY - CUBIC YARD

DIA - DIAMETER

DIP - DUCTILE IRON PIPE

EA - EACH

EL - ELEVATION

FES - FLARED END SECTION

FL - FLOW LINE

FO - FIBER OPTIC

FT - FEET

IDOT - IOWA DEPARTMENT OF TRANSPORTATION

LB - LEFT BANK

LF - LINEAR FOOT

LS - LUMP SUM

MAX - MAXIMUM

MFG - MANUFACTURER

MIN - MINIMUM

NDPES - NATIONAL DISCHARGE POLLUTANT ELIMINATION SYSTEM

RB - RIGHT BANK

RCP - REINFORCED CONCRETE PIPE

RCPA - REINFORCED CONCRETE PIPE ARCH

RECP - ROLLED EROSION CONTROL PRODUCT

SMP - SMOOTH METAL PIPE

SUDAS - STATEWIDE URBAN DESIGN AND SPECIFICATIONS

SWPPP - STORM WATER POLLUTION PREVENTION PLAN

SY - SQUARE YARD

TN - TON

TYP - TYPICAL

POLK COUNTY PUBLIC WORKS

MR. JOHN SWANSON

515.875.5880

JONATHON.SWANSON@POLKCOUNTYIOWA.GOV

5885 NE 14TH ST

DES MOINES, IOWA 50313

HOUSTON ENGINEERING

MR. CHARLES IKENBERRY, PE

515.444.5394

CIKENBERRY@HOUSTONENG.COM

100 COURT AVENUE, SUITE 202

DES MOINES, IOWA 50309

MR. TED RUD, PE

701.499.2079

TRUD@HOUSTONENG.COM

1401 21ST AVENUE N

FARGO, NORTH DAKOTA 58102

POLK COUNTY CONSERVATION

MRS. AMANDA BROWN

515.323.5357

AMANDA.BROWN@POLKCOUNTYIOWA.GOV

11204 NE 118TH AVE

MAXWELL, IOWA 50161

CONTACT INFORMATION:UTILITIES CONTACT INFORMATION:

CENTURYLINK

SADIE HULL

918.547.0147

SADIE.HULL@LUMEN.COM

MID AMERICAN ENERGY

JAIME NEER

515.252.6972

MECDSMDESIGNLOCATES@MIDAMERICAN.COM

SOUTHEAST POLK CSD

JENNIFER COSBY

515.262.7686

LOCATES@GOTOCI.COM

SOUTHEAST POLK RURAL WATER DIS

ED CLARK

515.323.6244

ONECALLMAPS@DMWW.COM

SECTION 23

BEAVER

TOWNSHIP

POLK COUNTY

792223100011

POLK COUNTY

792223300002

POLK COUNTY

792223300004

POLK COUNTY

792223300003

POLK COUNTY

792223300005

POLK COUNTY

792223300006

POLK COUNTY

792223300007

MARCO REYES

792223300008

MICHAEL E SWEENEY

792223300009

POLK COUNTY

792223100008

RICHARD C MEADE

792223401003

RICHARD C MEADE

792223401002

LAURAL L MILLER

792223400001

RICHARD C MEADE

792223401001

DENNIS W KELLER

792223251002

DENNIS W KELLER

792223251001

JULIA A LAVELY

792223200004

LIMITS OF CONSTRUCTION

LIMITS OF CONSTRUCTION

LIMITS OF CONSTRUCTION

SENSITIVE AREA

RICHARD C MEADE

792223401004

TIMOTHY HUFFMAN

792223400028

JASON JONS

792223400027

ACCESS ROUTE

STAGING AREA

STAGING AREA

ACCESS ROUTE

ACCESS ROUTE

STAGING AREA

ACCESS ROUTE

N

E 46TH AVE

NE 108TH ST

NE DEVOTIE DR

0+00

5+

10+00

15+00

20+00 25+00

29+00

61+50

50+00

55+00

60+00

100+00 105+00

110+00

3+

CONTRACTOR WILL BE

REQUIRED TO AVOID AREA

DURING CONSTRUCTION

CAMP CREEK

CAMP CREEK

CAMP CREEK NORTH

PLAN & PROFILE (1 OF 2)

CAMP CREEK NORTH

PLAN & PROFILE (2 OF 2)

TRIBUTARY PLAN

& PROFILE (1 OF 2)

TR

IB

UT

AR

Y

PL

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E (

OF

CAMP CREEK SOUTH

PLAN & PROFILE (3 OF 4)

CAMP CREEK SOUTH

PLA

N & PROFILE

(4

OF 4)

CAMP CREEK SOUTH

PLAN & PROFILE (2 OF 4) CONSTRUCTION EXIT, SEE

SUDAS DETAIL 9040.120 (TYP)

CONSTRUCTION EXIT PER

SUDAS DETAIL 9040.120 (TYP)

THOMAS

MITCHELL

POND

CP# 1

7507643.28

18591447.29

ELEV. 888.54

CP# 2

7507634.43

18592263.31

ELEV. 869.48

CP# 3

7505296.90

18592136.50

ELEV. 859.77

CP# 4

7503982.14

18592784.08

ELEV. 860.41

CP# 5

7505471.74

18592683.46

ELEV. 860.04

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PROJECT NO. 0143-0009

SHEET

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CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

HEI NO. 0143-0009

A.3

SITE PLAN

N

FeetScale

0 150 300150

S

CONTRACTOR WILL BE REQUIRED TO

AVOID AREA DURING CONSTRUCTION

PROPOSED STREAM CENTERLINE

EXISTING WATER EDGE

ACCESS ROUTE, SEE SHEET A.3

TOE ROCK, SEE

SHEET B.101

FLOODPLAIN BENCH,

SEE DETAIL 2-B.102

LIMITS OF CONSTRUCTION

BOUNDARY OF WOODED AREA

0+00

1+00

2+00

3+00

4+00

5+00

6+00

7+00

CROSS VANE #1

STA 6+59

SEE DETAIL 1-B.102

CAMP CREEK

INSTALL 100 FT OF TEMPORARY

SAFETY FENCE. FENCE SHALL BE

ANCHORED USING T-POSTS

DRIVEN NO DEEPER THAN 1.5 FT.

SENSITIVE AREA

EXISTING TREE, DO

NOT DISTURB (TYP)

TEMPORARY STREAM

CROSSING (SEE NOTE 4)

6 ROOTWADS, CONTRACTOR TO USE FOR TOE WOOD.

SEE SHEET B.9 FOR ALL STOCKPILE LOCATIONS

CONSTRUCT ROCK TIE IN

AND BANK SHAPING (TYP)

BANK SHAPING,

SEE DETAIL 1-B.103

20' FLOATATION SILT CURTAIN

45° FROM BANK

20' FLOATATION SILT CURTAIN

45° FROM BANK

0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00 6+50 7+00

ST

A:

6+

EL

EV

:8

.2

SURVEYED THALWEG

CROSS VANE #1

STA 6+59 SEE DETAIL 1-B.102

CROSS VANE CREST = 847.7

FLOODPLAIN BENCH

SEE DETAIL 2-B.102

ST

A:

6+

EL

EV

:8

.7

TOE ROCK, SEE

SHEETS B.101

SU

RV

EY

ED

T

HA

LW

EG

PR

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0.

9.

9.

9.

6.

6.

5.

6.

6.

6.

6.

6.

6.

6.

6.

9.

6.

6.

7.

7.

9.

9.

9.

ST

A:

6+

EL

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:8

.4

ST

A:

6+

EL

EV

:8

.1

BANK SHAPING, SEE

DETAIL 1-B.103

ST

A:

5+

EL

EV

:8

.3

ST

A:

4+

EL

EV

:8

.2

ST

A:

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EL

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:8

.2

FeetScale

0 30 6030

CAMP CREEK SOUTH PLAN

AND PROFILE (1 OF 4)

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SHEET

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Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

HEI NO. 0143-0009

N

NOTE:

1. CONTRACTOR RESPONSIBLE FOR LOCATING AND AVOIDING

ALL STORM SEWER OUTLETS AND DRAIN TILES IN CHANNEL

BANKS.

2. EXISTING GROUND SURVEYED BY HEI (APRIL 2024).

3. TOP OF TOE ROCK IN PROFILE VIEW IS SHOWN AT THE

BANKFULL ELEVATION. ACTUAL TOP OF TOE ROCK

ELEVATION VARIES BY LOCATION, SEE CROSS SECTION

SHEETS AND GRADING DETAILS. GRADING AND BANK

SHAPING BEHIND THE TOE ROCK IS NOT SHOWN ON THE

PROFILES AND SHALL BE DONE ACCORDING TO THE

DETAILS AND TABLE ON SHEET B.101.

4. CONTRACTOR TO INSTALL TEMPORARY STREAM

CROSSINGS AS NEEDED PER IOWA DOT SPEC EW-401.

ALLOWABLE CROSSING LOCATIONS SHOWN. CONTRACTOR

NOT REQUIRED TO USE ALL POTENTIAL CROSSING

LOCATIONS.

LEGEND:

FINISH GRADE - FILL

FINISH GRADE - CUT

STAGING AREA

ROCK RIPRAP

TEMPORARY STREAM CROSSING

TREE - DO NOT DISTURB

SAFETY FENCE

FLOATATION SILT CURTAINS S

7+00

8+00

9+00

+0

11+00

12+00

13+00

14+00

15+00

16+00

TEMPORARY STREAM

CROSSING (SEE NOTE 4)

ACCESS ROUTE, SEE SHEET A.3

FLOODPLAIN BENCH, SEE

DETAIL 2-B.102

STAGING AREA, SEE SHEET A.3

REMOVE AND

DISPOSE OF VEHICLES

(APPROXIMATELY 4)

OFF-SITE

PLACE EXCAVATED ISLAND

MATERIAL BEHIND TOE ROCK

SEE SHEET B.101

CROSS VANE #2

STA. 11+95

SEE DETAIL 1-B.102

(SEE NOTE 6)

CONSTRUCT ROCK TIEBACK

AND BANK SHAPING (TYP)

TOE ROCK, SEE

SHEET B.101

PROPOSED STREAM

CENTERLINE

EXISTING WATER EDGE

EXISTING STREAM

CENTERLINE

ROCK RIFFLE #1

STA. 15+10

SEE DETAIL 1-B.100

CAMP CREEK

BOUNDARY OF

WOODED AREA

PLACE EXCAVATED MATERIAL BEHIND

TOE ROCK, GRADE TO DRAIN.

PLACE EXCAVATED MATERIAL BEHIND

TOE ROCK, GRADE TO DRAIN.

TOE WOOD, SEE

DETAIL 1-B.104

EXISTING TREE, DO

NOT DISTURB (TYP)

DO NOT DISTURB TREE

(SEE NOTE 5)

1 ROOTWAD, CONTRACTOR TO USE

FOR TOE WOOD. SEE SHEET B.9 FOR

ALL STOCKPILE LOCATIONS

9 ROOTWADS, CONTRACTOR TO USE

FOR TOE WOOD. SEE SHEET B.9 FOR

ALL STOCKPILE LOCATIONS

2 LOGS, CONTRACTOR TO USE

FOR TOE WOOD. SEE SHEET B.9

FOR ALL STOCKPILE LOCATIONS

CONSTRUCT ROCK TIE IN

AND BANK SHAPING (TYP)

LIMITS OF CONSTRUCTION

7+00 7+50 8+00 8+50 9+00 9+50 10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+50 14+00

7.

6.

6.

6.

7.

7.

7.

8.

8.

9.

9.

9.

1.

9.

1.

9.

1.

9.

1.

ST

A:

+9

EL

EV

:8

.5

ST

A:

+8

EL

EV

:8

.3

0.

0.

0.

0.

0.

0.

0.

1.

1.

1.

SU

RV

EY

ED

T

HA

LW

EG

PR

O

PO

SE

D

BA

N

KF

U

LL

FLOODPLAIN BENCH

SEE DETAIL 2-B.102

FLOODPLAIN BENCH

SEE DETAIL 2-B.102

FLOODPLAIN BENCH

SEE DETAIL 2-B.102

FLOODPLAIN BENCH

SEE DETAIL 2-B.102

ST

A:

7+

EL

EV

:8

.4

ST

A:

8+

EL

EV

:8

.5

ST

A:

8+

EL

EV

:8

.6

ST

A:

8+

EL

EV

:8

.6

ST

A:

+0

EL

EV

:8

.9

ST

A:

+1

EL

EV

:8

.0

ST

A:

+7

EL

EV

:8

.4

ST

A:

+2

EL

EV

:8

.9

ST

A:

+7

EL

EV

:8

.9

ST

A:

+9

EL

EV

:8

.9

ST

A:

+9

EL

EV

:8

.9

SURVEYED THALWEG

CROSS VANE #2

STA 11+95 SEE DETAIL 1-B.102

CROSS VANE CREST = 849.5

TOE ROCK, SEE SHEET B.101

FeetScale

0 30 6030

CAMP CREEK SOUTH PLAN

AND PROFILE (2 OF 4)

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

CA

M P

CR

EE

K

SO

U

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-5 /1

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-(t ba lm er

ByDateRevisionNo.

B.2 PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

AS SHOWN

HEI NO. 0143-0009

N

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IA

LEGEND:

FINISH GRADE - FILL

FINISH GRADE - CUT

STAGING AREA

ROCK RIPRAP

TEMPORARY STREAM CROSSING

TREE - DO NOT DISTURB

NOTE:

1. CONTRACTOR RESPONSIBLE FOR LOCATING AND AVOIDING

ALL STORM SEWER OUTLETS AND DRAIN TILES IN CHANNEL

BANKS.

2. EXISTING GROUND SURVEYED BY HEI (APRIL 2024).

3. TOP OF TOE ROCK IN PROFILE VIEW IS SHOWN AT THE

BANKFULL ELEVATION. ACTUAL TOP OF TOE ROCK

ELEVATION VARIES BY LOCATION, SEE CROSS SECTION

SHEETS AND GRADING DETAILS. GRADING AND BANK

SHAPING BEHIND THE TOE ROCK IS NOT SHOWN ON THE

PROFILES AND SHALL BE DONE ACCORDING TO THE

DETAILS AND TABLE ON SHEET B.101.

4. CONTRACTOR TO INSTALL TEMPORARY STREAM

CROSSINGS AS NEEDED PER IOWA DOT SPEC EW-401.

ALLOWABLE CROSSING LOCATIONS SHOWN. CONTRACTOR

NOT REQUIRED TO USE ALL POTENTIAL CROSSING

LOCATIONS.

5. DO NOT DISTURB LARGE TREE. TERMINATE ROCK TIE IN IF

LARGE ROOTS ARE ENCOUNTERED.

6. CROSS VANE IS TO BE USED AS A FUTURE PEDESTRIAN

CROSSING. STONES ARE TO BE PLACED FLAT ACROSS

CHANNEL. VERIFY WITH FIELD ENGINEER BEFORE

PLACEMENT.

OHP

OHP

OHP

OHP

OHP

OHP

OH

P

OH

P

OH

P

OH

P

OH

P

OH

P

OHP

UGE UGE

UGE

UGE

14+00

15+00

16+00

17+00

18+00 19+00

20+00 21+00

+0

NE 108TH ST

NE DEVOTIE DR

PROPOSED STREAM

CENTERLINE

TOE ROCK, SEE

SHEET B.101

FLOODPLAIN BENCH, SEE

DETAIL 2-B.102 (TYP)

ACCESS ROUTE, SEE SHEET A.3

ROCK RIFFLE #1

STA. 15+10

SEE DETAIL 1-B.100

EXISTING WATER EDGE

CROSS VANE #3

STA. 19+25

SEE DETAIL 1-B.102

PLACE 58 TN OF 2 FT THICK CLASS "E" RIPRAP

AS DRAINAGE REINFORCEMENT, 13 FT MIN

WIDTH OVER 36 FT LENGTH, MATCH EXISTING

GRADE. REQUIRED EXCAVATION SHALL BE

INCIDENTAL TO RIPRAP. SEE DETAIL 3-B.103

ACCESS ROUTE, SEE SHEET A.3

TOE WOOD, SEE

DETAIL 1-B.104

LIMITS OF CONSTRUCTION

CAMP CREEK

BOUNDARY OF WOODED AREA

EXISTING TREE, DO

NOT DISTURB (TYP)

TEMPORARY STREAM

CROSSING (SEE NOTE 4)

13 LOGS & 14 ROOTWADS, CONTRACTOR

TO USE FOR TOE WOOD. SEE SHEET B.9

FOR ALL STOCKPILE LOCATIONS

CONSTRUCT ROCK TIE IN

AND BANK SHAPING (TYP)

DO NOT DISTURB

TREE (SEE NOTE 5)

TEMPORARY STREAM

CROSSING (SEE NOTE 4)

14+00 14+50 15+00 15+50 16+00 16+50 17+00 17+50 18+00 18+50 19+00 19+50 20+00 20+50 21+00

9.

9.

9.

9.

0.

0.

0.

9.

0.

0.

0.

2.

1.

1.

1.

0.

ST

A:

+1

EL

EV

:8

.6

ST

A:

+9

EL

EV

:8

.6

TOE WOOD, SEE

DETAIL 1-B.104

TOE WOOD,

SEE DETAIL

1-B.104

FLOODPLAIN BENCH

SEE DETAIL 2-B.102

FLOODPLAIN BENCH

SEE DETAIL 2-B.102

ST

A:

+2

EL

EV

:8

.6

ST

A:

+1

EL

EV

:8

.1

2.

2.

1.

2.

DE

VO

TI

E

DR

SU

RV

EY

ED

T

HA

LW

EG

PR

O

PO

SE

D

BA

N

KF

U

LL

1.

2.

2.

2.

2.

2.

4.

ST

A:

+8

EL

EV

:8

.9

ST

A:

+5

EL

EV

:8

.9

ST

A:

+6

EL

EV

:8

.0

ST

A:

+0

EL

EV

:8

.0

SURVEYED THALWEG

CROSS VANE #3

STA 19+25 - SEE DETAIL 1-B.102

CROSS VANE CREST = 851.4

ROCK RIFFLE #1

STA 15+10 - SEE DETAIL 1-B.100

RIFFLE CREST = 850.6

TOE ROCK, SEE

SHEET B.101

NE DEVOTIE DR BRIDGE

LC = 866.0

FeetScale

0 30 6030

CAMP CREEK SOUTH PLAN

AND PROFILE (3 OF 4)

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

CA

M P

CR

EE

K

SO

U

TH

P

LA

N A

N D

PR

O

FI

LE

(3 O

F 4)

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

B.3

SHEET

Scale

Drawn by Date

Checked by h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

CA

M P

CR

EE

K

SO

U

TH

P

LA

N A

N D

PR

O

FI

LE

(3 O

F 4)

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

HEI NO. 0143-0009

LEGEND:

FINISH GRADE - FILL

FINISH GRADE - CUT

STAGING AREA

ROCK RIPRAP

CONSTRUCTION EXIT

TEMPORARY STREAM CROSSING

TREE - DO NOT DISTURB

N

NOTE:

1. CONTRACTOR RESPONSIBLE FOR LOCATING AND AVOIDING

ALL STORM SEWER OUTLETS AND DRAIN TILES IN CHANNEL

BANKS.

2. EXISTING GROUND SURVEYED BY HEI (APRIL 2024).

3. TOP OF TOE ROCK IN PROFILE VIEW IS SHOWN AT THE

BANKFULL ELEVATION. ACTUAL TOP OF TOE ROCK

ELEVATION VARIES BY LOCATION, SEE CROSS SECTION

SHEETS AND GRADING DETAILS. GRADING AND BANK

SHAPING BEHIND THE TOE ROCK IS NOT SHOWN ON THE

PROFILES AND SHALL BE DONE ACCORDING TO THE

DETAILS AND TABLE ON SHEET B.101.

4. CONTRACTOR TO INSTALL TEMPORARY STREAM

CROSSINGS AS NEEDED PER IOWA DOT SPEC EW-401.

ALLOWABLE CROSSING LOCATIONS SHOWN. CONTRACTOR

NOT REQUIRED TO USE ALL POTENTIAL CROSSING

LOCATIONS.

5. DO NOT DISTURB LARGE TREE. TERMINATE ROCK TIE IN IF

LARGE ROOTS ARE ENCOUNTERED.

UG

E

UG

E

UG

E

UG

E

UG

E

UG

E

UG

E

UG

E

UG

E

OH

P

OH

P

OH

P

AVOID MULTI-STEM

20" DIA. BASSWOOD

CONSTRUCT ROCK TIE IN

AND BANK SHAPING (TYP)

PROPOSED STREAM CENTERLINE

EXISTING WATER EDGE

TOE ROCK, SEE

SHEET B.101

21+00

22+00

23+00

24+00

25+00

26+00

27+00

28+00

29+00

LIMITS OF CONSTRUCTION

EXISTING STREAM CENTERLINE

EXCAVATE ISLAND MATERIAL TO

ESTABLISH SINGLE FLOW PATH,

QUANTITIES ARE INCLUDED IN

THE BANK SHAPING QUANTITIES

ACCESS ROUTE, SEE SHEET A.3

CAMP CREEK

BOUNDARY OF WOODED AREA

TOE WOOD, SEE

DETAIL 1-B.104

PLACE 58 TN OF 2 FT THICK CLASS "E" RIPRAP

AS DRAINAGE REINFORCEMENT, 13 FT MIN

WIDTH OVER 36 FT LENGTH, MATCH EXISTING

GRADE. REQUIRED EXCAVATION SHALL BE

INCIDENTAL TO RIPRAP. SEE DETAIL 3-B.103

EXISTING TREE, DO NOT

DISTURB (SEE NOTE 5)

CONSTRUCTION EXIT,

SEE SUDAS DETAIL 9040.120

TEMPORARY STREAM

CROSSING (SEE NOTE 4)

1 LOG, CONTRACTOR TO USE

FOR TOE WOOD. SEE SHEET B.9

FOR ALL STOCKPILE LOCATIONS

1 ROOTWAD & BRANCH PILE,

CONTRACTOR TO USE FOR TOE

WOOD. SEE SHEET B.9 FOR ALL

STOCKPILE LOCATIONS

2 ROOTWAD & 1 LOG, CONTRACTOR

TO USE FOR TOE WOOD. SEE SHEET

B.9 FOR ALL STOCKPILE LOCATIONS

1 ROOTWAD, CONTRACTOR TO

USE FOR TOE WOOD. SEE SHEET

B.9 FOR ALL STOCKPILE LOCATIONS

21+00 21+50 22+00 22+50 23+00 23+50 24+00 24+50 25+00 25+50 26+00 26+50 27+00 27+50 28+00 28+50

0.

1.

1.

1.

1.

1.

1.

1.

4.

1.

4.

1.

5.

1.

5.

1.

5.

2.

2.

2.

2.

SURVEYED THALWEG

TOE ROCK, SEE

SHEET B.101

TOE WOOD, SEE

DETAIL 1-B.105

5.

SU

RV

EY

ED

T

HA

LW

EG

PR

O

PO

SE

D

BA

N

KF

U

LL

ISLAND

EXCAVATION

4.

4.

TOE ROCK, SEE

SHEET B.101

ST

A:

+0

EL

EV

:8

.4

ST

A:

+5

EL

EV

:8

.3

ST

A:

+5

EL

EV

:8

.2

ST

A:

+2

EL

EV

:8

.8

FeetScale

0 30 6030

CAMP CREEK SOUTH PLAN

AND PROFILE (4 OF 4)

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

CA

M P

CR

EE

K

SO

U

TH

P

LA

N A

N D

PR

O

FI

LE

(4 O

F 4)

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

B.4

SHEET

Scale

Drawn by Date

Checked by h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

CA

M P

CR

EE

K

SO

U

TH

P

LA

N A

N D

PR

O

FI

LE

(4 O

F 4)

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

HEI NO. 0143-0009

NOTE:

1. CONTRACTOR RESPONSIBLE FOR LOCATING AND AVOIDING

ALL STORM SEWER OUTLETS AND DRAIN TILES IN CHANNEL

BANKS.

2. EXISTING GROUND SURVEYED BY HEI (APRIL 2024).

3. TOP OF TOE ROCK IN PROFILE VIEW IS SHOWN AT THE

BANKFULL ELEVATION. ACTUAL TOP OF TOE ROCK

ELEVATION VARIES BY LOCATION, SEE CROSS SECTION

SHEETS AND GRADING DETAILS. GRADING AND BANK

SHAPING BEHIND THE TOE ROCK IS NOT SHOWN ON THE

PROFILES AND SHALL BE DONE ACCORDING TO THE

DETAILS AND TABLE ON SHEET B.101.

4. CONTRACTOR TO INSTALL TEMPORARY STREAM

CROSSINGS AS NEEDED PER IOWA DOT SPEC EW-401.

ALLOWABLE CROSSING LOCATIONS SHOWN. CONTRACTOR

NOT REQUIRED TO USE ALL POTENTIAL CROSSING

LOCATIONS.

5. DO NOT DISTURB LARGE TREE. CONTRACTOR TO GRADE TO

AVOID DAMAGE TO TREE AND ROOT SYSTEM.

LEGEND:

FINISH GRADE - FILL

FINISH GRADE - CUT

ROCK RIPRAP

CONSTRUCTION EXIT

TEMPORARY STREAM CROSSING

TREE - DO NOT DISTURB

N

S

865 870

S

S

S

50+00

51+00

52+00

+0

54+00 55+00

56+00

57+00

58+00

59+00

60+00

STAGING AREA, SEE SHEET A.3

CONSTRUCT ROCK TIE IN

AND BANK SHAPING (TYP)

ACCESS ROUTE, SEE SHEET A.3

ACCESS ROUTE,

SEE SHEET A.3

CROSS VANE #4

STA. 58+26

SEE DETAIL 1-B.102

SEE SHEETS B.7 & B.8 FOR

TRIBUTARY CHANNEL PLAN

EXISTING CONCRETE WEIR,

DO NOT DISTURB

TOE ROCK, SEE

SHEET B.101

LIMITS OF CONSTRUCTION

PROPOSED STREAM CENTERLINE

EXCAVATE POINT BAR

MATERIAL AND PLACE BEHIND

TOE ROCK TO SOFTEN CURVE

EXISTING WATER EDGE

EXISTING STEPS,

DO NOT DISTURB

TOE WOOD, SEE

DETAIL 1-B.105

CAM

P CREEK

BOUNDARY OF WOODED AREA

CONTRACTOR TO USE EXISTING RIFFLE AS

TEMPORARY CROSSING. IF DAMAGED, CONTRACTOR

TO RESTORE EXISTING RIFFLE TO PRECONSTRUCTION

CONDITIONS WITH RIPRAP POST CONSTRUCTION.

THIS IS INCIDENTAL TO MOBILIZATION

EXISTING WETLAND (TYP)

BANK SHAPING, SEE

DETAIL 1-B.103 (TYP)

EXISTING TREE, DO

NOT DISTURB (TYP)

EXISTING WATER

MAIN MANHOLE

DO NOT DISTURB

WETLAND

DO NOT DISTURB

WETLAND

1 ROOTWAD, CONTRACTOR TO

USE FOR TOE WOOD. SEE SHEET

B.9 FOR ALL STOCKPILE LOCATIONS

45' FLOATATION SILT CURTAIN

45° FROM BANK

45' FLOATATION SILT CURTAIN

45° FROM BANK

50+00 50+50 51+00 51+50 52+00 52+50 53+00 53+50 54+00 54+50 55+00 55+50 56+00

7.

7.

8.

8.

7.

7.

7.

8.

8.

9.

9.

0.

TOE WOOD,

SEE DETAIL

1-B.104

ST

A:

+3

EL

EV

:8

.6

SU

RV

EY

ED

T

HA

LW

EG

PR

O

PO

SE

D

BA

N

KF

U

LL

SURVEYED THALWEG EXISTING CONCRETE WEIR

BANK SHAPING,

SEE DETAIL 1-B.103

TOE ROCK, SEE

SHEET B.101

0.

0.

7.

7.

8.

8.

7.

7.

7.

8.

8.

9.

0.

9.

0.

9.

0.

ST

A:

+2

EL

EV

:8

.7

FeetScale

0 30 6030

CAMP CREEK NORTH PLAN

AND PROFILE (1 OF 2)

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

CA

M P

CR

EE

K N

O

RT

H

PL

AN

A

N D

PR

O

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(1 O

F 2)

-5 /1

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-(t ba lm er

ByDateRevisionNo.

B.5

N

LEGEND:

FINISH GRADE - FILL

FINISH GRADE - CUT

STAGING AREA

ROCK RIPRAP

CONSTRUCTION EXIT

TREE - DO NOT DISTURB

FLOATATION SILT CURTAIN

NOTE:

1. CONTRACTOR RESPONSIBLE FOR LOCATING AND AVOIDING

ALL STORM SEWER OUTLETS AND DRAIN TILES IN CHANNEL

BANKS.

2. EXISTING GROUND SURVEYED BY HEI (APRIL 2024).

3. TOP OF TOE ROCK IN PROFILE VIEW IS SHOWN AT THE

BANKFULL ELEVATION. ACTUAL TOP OF TOE ROCK

ELEVATION VARIES BY LOCATION, SEE CROSS SECTION

SHEETS AND GRADING DETAILS. GRADING AND BANK

SHAPING BEHIND THE TOE ROCK IS NOT SHOWN ON THE

PROFILES AND SHALL BE DONE ACCORDING TO THE

DETAILS AND TABLE ON SHEET B.101.

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

CA

M P

CR

EE

K N

O

RT

H

PL

AN

A

N D

PR

O

FI

LE

(1 O

F 2)

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

HEI NO. 0143-0009

S S

865 870

860 EXCAVATE POINT BAR

MATERIAL AND PLACE BEHIND

TOE ROCK TO SOFTEN CURVE

SEE SHEET B.101

PROPOSED STREAM CENTERLINE

CONSTRUCT ROCK TIE IN

AND BANK SHAPING (TYP)

STAGING AREA, SEE SHEET A.3

ACCESS ROUTE, SEE SHEET A.3

CROSS VANE #4

STA. 58+26

SEE DETAIL 1-B.102

EXISTING WATER EDGE

SEE SHEETS B.7 & B.8

TRIBUTARY CHANNEL PLAN

TOE ROCK, SEE

SHEET B.101 LIMITS OF CONSTRUCTION

ACCESS ROUTE, SEE SHEET A.3

BANK SHAPING, SEE

DETAIL 1-B.103 (TYP)

61+50

55+00

56+00

57+00

58+00

59+00

60+00 61+00

CAMP CREEK

56'X12'X7' RCB

S INV. 859.76

56'X12'X7' RCB'

S INV. 859.79

12'X29"X18" CMP

N INV. 860.91

S INV. 860.81

12'X29"X18" CMP

N INV. 860.92

S INV. 860.96

12'X29"X18" CMP

N INV. 861.00

S INV. 861.21

12'X29"X18" CMP

N INV. 860.79

S INV. 860.81

12'X29"X18" CMP

N INV. 861.07

S INV. 860.97

BOUNDARY OF WOODED AREA

ROCK RIFFLE #2

STA 59+60

SEE DETAIL 1-B.100

105+00

EXISTING WETLAND (TYP)

EXISTING TREE, DO

NOT DISTURB (TYP)

CONSTRUCTION EXIT,

SEE SUDAS DETAIL 9040.120

BRANCH PILE, CONTRACTOR TO

USE FOR TOE WOOD. SEE SHEET

B.9 FOR ALL STOCKPILE LOCATIONS

3 LOGS, CONTRACTOR TO

USE FOR TOE WOOD. SEE

SHEET B.9 FOR ALL

STOCKPILE LOCATION

56+00 56+50 57+00 57+50 58+00 58+50 59+00 59+50 60+00 60+50 61+00 61+50 62+00

9.

9.

9.

7.

0.

8.

1.

8.

8.

9.

0.

1.

0.

SURVEYED THALWEG

CROSS VANE #4

STA 58+26 - SEE DETAIL 1-B.102

CROSS VANE CREST = 859.80

(5) 29"X18" CMPATOE ROCK, SEE SHEETS

B.101 & B.102 (TYP)

EXISTING WATER CROSSING

SU

RV

EY

ED

T

HA

LW

EG

PR

O

PO

SE

D

BA

N

KF

U

LL

ST

A:

+2

EL

EV

:8

.8

ST

A:

+1

EL

EV

:8

.3

0.

0.

DR

IV

E

W

AT

ER

C

RO

SS

IN

G

12'X7' RCB

S INV. 859.76

EXISTING ROAD EMBANKMENT

12'X7' RCB

S INV. 859.79

BANK SHAPING,

SEE DETAIL 1-B.103

ST

A:

+4

EL

EV

:8

.8

ST

A:

+6

EL

EV

:8

.8

ROCK RIFFLE #2

STA 59+60 - SEE DETAIL 1-B.100

RIFFLE CREST = 860.80

ST

A:

+1

EL

EV

:8

.9

ST

A:

+0

EL

EV

:8

.0

ST

A:

+7

EL

EV

:8

.9

2.

FeetScale

0 30 6030

CAMP CREEK NORTH PLAN

AND PROFILE (2 OF 2)

h:

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\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

CA

M P

CR

EE

K N

O

RT

H

PL

AN

A

N D

PR

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FI

LE

(2 O

F 2)

-5 /1

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:0

PM

-(t ba lm er

B.6

N

LEGEND:

FINISH GRADE - FILL

FINISH GRADE - CUT

STAGING AREA

ROCK RIPRAP

CONSTRUCTION EXIT

TREE - DO NOT DISTURB

NOTE:

1. CONTRACTOR RESPONSIBLE FOR LOCATING AND AVOIDING

ALL STORM SEWER OUTLETS AND DRAIN TILES IN CHANNEL

BANKS.

2. EXISTING GROUND SURVEYED BY HEI (APRIL 2024).

3. TOP OF TOE ROCK IN PROFILE VIEW IS SHOWN AT THE

BANKFULL ELEVATION. ACTUAL TOP OF TOE ROCK

ELEVATION VARIES BY LOCATION, SEE CROSS SECTION

SHEETS AND GRADING DETAILS. GRADING AND BANK

SHAPING BEHIND THE TOE ROCK IS NOT SHOWN ON THE

PROFILES AND SHALL BE DONE ACCORDING TO THE

DETAILS AND TABLE ON SHEET B.101.

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

CA

M P

CR

EE

K N

O

RT

H

PL

AN

A

N D

PR

O

FI

LE

(2 O

F 2)

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

SEE SHEETS B.5 & B.6

FOR CHANNEL PLAN

TOE ROCK, SEE

SHEET B.101

EXISTING CHANNEL CUTOFF

(SEE NOTE 6)PROPOSED STREAM CENTERLINE

RECONNECT MEANDER

STEP-POOL STRUCTURE

STA. 102+14

SEE DETAIL 2-B.103

ROCK RIFFLE #3

STA. 109+35

SEE DETAIL 1-B.100

CHANNEL DEBRIS

REMOVAL (SEE NOTE 5)

ACCESS ROUTE,

SEE SHEET A.3

ACCESS ROUTE, SEE SHEET A.3

LIMITS OF CONSTRUCTION50+00

51+00

+0

54+00

55+00

56+00

BOUNDARY OF

WOODED AREA

CAM

P CREEK

100+00

101+00

2+

3+

104+00

105+00

106+00

107+00

108+00

109+00

110+00

111+00

EXISTING WETLAND (TYP)

860860

EXISTING TREE, DO

NOT DISTURB (TYP)

CONTRACTOR TO USE EXISTING RIFFLE AS

TEMPORARY CROSSING. IF DAMAGED, CONTRACTOR

TO RESTORE EXISTING RIFFLE TO PRECONSTRUCTION

CONDITIONS WITH RIPRAP POST CONSTRUCTION.

THIS IS INCIDENTAL TO MOBILIZATION

1 ROOTWAD, CONTRACTOR TO

USE FOR TOE WOOD. SEE SHEET

B.9 FOR ALL STOCKPILE LOCATIONS

BANK SHAPING, SEE

DETAIL 1-B.103

15' FLOATATION SILT CURTAIN

45° FROM BANK

15' FLOATATION SILT CURTAIN

45° FROM BANK

100+00 100+50 101+00 101+50 102+00 102+50 103+00 103+50 104+00 104+50 105+00 105+50 106+00 106+50 107+00

8.

8.

9.

9.

0.

0.

1.

1.

1.

2.

6.

2.

6.

3.

4.

3.

4.

STEP-POOL STRUCTURE

STA 102+14 - SEE DETAIL 2-B.103

RIFFLE CREST = 863.2

SURVEYED THALWEG

TOE ROCK, SEE SHEET B.101

ST

A:

2+

EL

EV

:8

.2

ST

A:

1+

EL

EV

:8

.4

ST

A:

1+

EL

EV

:8

.6

ST

A:

1+

EL

EV

:8

.8

2.

5.

SU

RV

EY

ED

T

HA

LW

EG

PR

O

PO

SE

D

BA

N

KF

U

LL

ST

A:

4+

EL

EV

:8

.4

ST

A:

5+

EL

EV

:8

.7

BANK SHAPING,

SEE DETAIL 1-B.103

FeetScale

0 30 6030

TRIBUTARY PLAN AND

PROFILE (1 OF 2)

h:

\J

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0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

TR

IB

U

TA

RY

P

LA

N A

N D

PR

O

FI

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(1 O

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-5 /1

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:0

PM

-(t ba lm er

B.7

NOTE:

1. CONTRACTOR RESPONSIBLE FOR LOCATING AND AVOIDING

ALL STORM SEWER OUTLETS AND DRAIN TILES IN CHANNEL

BANKS.

2. EXISTING GROUND SURVEYED BY HEI (APRIL 2024).

3. TOP OF TOE ROCK IN PROFILE VIEW IS SHOWN AT THE

BANKFULL ELEVATION. ACTUAL TOP OF TOE ROCK

ELEVATION VARIES BY LOCATION, SEE CROSS SECTION

SHEETS AND GRADING DETAILS. GRADING AND BANK

SHAPING BEHIND THE TOE ROCK IS NOT SHOWN ON THE

PROFILES AND SHALL BE DONE ACCORDING TO THE

DETAILS AND TABLE ON SHEET B.101.

4. CONTRACTOR TO INSTALL TEMPORARY STREAM

CROSSINGS AS NEEDED PER IOWA DOT SPEC EW-401.

ALLOWABLE CROSSING LOCATIONS SHOWN. CONTRACTOR

NOT REQUIRED TO USE ALL POTENTIAL CROSSING

LOCATIONS.

5. REMOVE ALL DEBRIS LARGER THAN 12 INCHES IN

DIAMETER OR GREATER THAN 10 FEET IN LENGTH FROM

THE TRIBUTARY STREAM. CONFIRM REMOVAL WITH FIELD

ENGINEER. DEBRIS REMOVAL IS INCLUDED IN CLEARING

AND GRUBBING. SMALLER BRANCHES MAY BE USED FOR

LAYERING BRUSH IN TOE WOOD WITH APPROVAL FROM

ENGINEER.

6. CONTRACTOR SHALL USE ON-SITE EXCESS EXCAVATION

MATERIAL TO CONSTRUCT FEATURES ABOVE EXISTING

GRADE. VERIFY SUITABLE MATERIAL WITH FIELD ENGINEER.

LEGEND:

FINISH GRADE - FILL

FINISH GRADE - CUT

STAGING AREA

ROCK RIPRAP

CONSTRUCTION EXIT

CHANNEL DEBRIS REMOVAL

TREE - DO NOT DISTURB

FLOATATION SILT CURTAIN

N h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

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Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

TR

IB

U

TA

RY

P

LA

N A

N D

PR

O

FI

LE

(1 O

F 2)

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

S S

55+00

56+00

113+50

103+00

4+

105+00

106+00

107+00

8+

109+00 11 0+

111+00

112+00

113+00

SEE SHEETS B.5 & B.6

FOR CHANNEL PLAN

PROPOSED STREAM CENTERLINE

EXISTING CHANNEL CUTOFF

(SEE NOTE 6)

RECONNECT MEANDER

ROCK RIFFLE #3

STA. 109+35

SEE DETAIL 1-B.100

TOE ROCK, SEE

SHEET B.101

ACCESS ROUTE, SEE SHEET A.3

CHANNEL DEBRIS

REMOVAL (SEE NOTE 5)

LIMITS OF CONSTRUCTION

30" RCP POND OUTLET

W INV. 870.48

PLACE FILL IN

CHANNEL CUTOFF

THOMAS MITCHELL POND

CAM

P CREEK

BOUNDARY OF WOODED AREA

EXISTING WETLAND (TYP)

1 ROOTWAD, CONTRACTOR TO

USE FOR TOE WOOD. SEE SHEET

B.9 FOR ALL STOCKPILE LOCATIONS

107+00 107+50 108+00 108+50 109+00 109+50 110+00 110+50 111+00 111+50 112+00 112+50 113+00 113+50

4.

4.

4.

7.

4.

7.

5.

5.

5.

6.

6.

6.

SU

RV

EY

ED

T

HA

LW

EG

PR

O

PO

SE

D

BA

N

KF

U

LL

ST

A:

9+

EL

EV

:8

.4

ST

A:

9+

EL

EV

:8

.4

9.

9.

9.

9.

ROCK RIFFLE #3

STA 109+35 - SEE DETAIL 1-B.100

RIFFLE CREST = 866.40

SURVEYED THALWEG

30" RCP POND OUTLET

W INV. 870.48

TOE ROCK, SEE

SHEET B.101

TOP OF DAM

STA. 112+95

EL. 896.2

ST

A:

7+

EL

EV

:8

.5

ST

A:

8+

EL

EV

:8

.9

ST

A:

9+

EL

EV

:8

.1

ST

A:

9+

EL

EV

:8

.1

ST

A:

0+

EL

EV

:8

.2

ST

A:

0+

EL

EV

:8

.3

ST

A:

1+

EL

EV

:8

.4

ST

A:

8+

EL

EV

:8

.6

FeetScale

0 30 6030

TRIBUTARY PLAN AND

PROFILE (2 OF 2)

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

TR

IB

U

TA

RY

P

LA

N A

N D

PR

O

FI

LE

(2 O

F 2)

-5 /1

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:0

PM

-(t ba lm er

B.8

N

LEGEND:

FINISH GRADE - FILL

FINISH GRADE - CUT

STAGING AREA

ROCK RIPRAP

CONSTRUCTION EXIT

CHANNEL DEBRIS REMOVAL

TREE - DO NOT DISTURB

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

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A-

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TR

IB

U

TA

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P

LA

N A

N D

PR

O

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(2 O

F 2)

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

HEI NO. 0143-0009

NOTE:

1. CONTRACTOR RESPONSIBLE FOR LOCATING AND AVOIDING

ALL STORM SEWER OUTLETS AND DRAIN TILES IN CHANNEL

BANKS.

2. EXISTING GROUND SURVEYED BY HEI (APRIL 2024).

3. TOP OF TOE ROCK IN PROFILE VIEW IS SHOWN AT THE

BANKFULL ELEVATION. ACTUAL TOP OF TOE ROCK

ELEVATION VARIES BY LOCATION, SEE CROSS SECTION

SHEETS AND GRADING DETAILS. GRADING AND BANK

SHAPING BEHIND THE TOE ROCK IS NOT SHOWN ON THE

PROFILES AND SHALL BE DONE ACCORDING TO THE

DETAILS AND TABLE ON SHEET B.101.

4. CONTRACTOR TO INSTALL TEMPORARY STREAM

CROSSINGS AS NEEDED PER IOWA DOT SPEC EW-401.

ALLOWABLE CROSSING LOCATIONS SHOWN. CONTRACTOR

NOT REQUIRED TO USE ALL POTENTIAL CROSSING

LOCATIONS.

5. REMOVE ALL DEBRIS LARGER THAN 12 INCHES IN

DIAMETER OR GREATER THAN 10 FEET IN LENGTH FROM

THE TRIBUTARY STREAM. CONFIRM REMOVAL WITH FIELD

ENGINEER. DEBRIS REMOVAL IS INCLUDED IN CLEARING

AND GRUBBING. SMALLER BRANCHES MAY BE USED FOR

LAYERING BRUSH IN TOE WOOD WITH APPROVAL FROM

ENGINEER.

6. CONTRACTOR SHALL USE ON-SITE EXCESS EXCAVATION

MATERIAL TO CONSTRUCT FEATURES ABOVE EXISTING

GRADE. VERIFY SUITABLE MATERIAL WITH FIELD ENGINEER.

1 ROOTWAD

3 LOGS

BRANCH PILE

1 ROOTWAD

1 LOG

1 ROOTWAD

BRANCH PILE

2 ROOTWADS

1 LOG

1 ROOTWAD

14 ROOTWADS 13 LOGS

2 LOGS

9 ROOTWADS

1 ROOTWAD

6 ROOTWADS

NE 108TH ST

THOMAS MITCHELL POND

NE DEVOTIE DR

STREAM CENTERLINE

STREAM CENTERLINE

TRIBUTARY CENTERLINE

CAMP CREEK

FeetScale

0 125 250125

STOCKPILE MAP

h:

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P ro fil e_

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A-

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ST

O

CK

PI

LE

M

AP

-5 /1

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:0

PM

-(t ba lm er

B.9

N h:

\J

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0\

\0

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CA

D\ Pl an s\

AR

A

9\

_0

9_

Pl an a nd

P ro fil e_

AR

A-

9.

dw g- B.

ST

O

CK

PI

LE

M

AP

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

4+73

0102030405060 0 -10 -20 -30 -40 -50 -60

5+72

0102030405060 0 -10 -20 -30 -40 -50 -60

6+06

0102030405060 0 -10 -20 -30 -40 -50 -60

6+59

0102030405060 0 -10 -20 -30 -40 -50 -60

7+53

0102030405060 0 -10 -20 -30 -40 -50 -60

8+15

0102030405060 0 -10 -20 -30 -40 -50 -60

8+50

0102030405060 0 -10 -20 -30 -40 -50 -60

9+38

0102030405060 0 -10 -20 -30 -40 -50 -60

3:1

2:1 3:1

3:1

2:1 1%

4:1

3:1

2:1

4:1

1%

2:1

3:1

2:1

1% 2:1

3:1

2%

5:1

2:1

1% 4:1

EXISTING GROUND (HEI SURVEY)

PROPOSED TOE ROCK PROPOSED TOE ROCK

PROPOSED FLOODPLAIN BENCH PROPOSED TOE ROCK

PROPOSED TOE ROCKPROPOSED FLOODPLAIN BENCH

PROPOSED FLOODPLAIN BENCH PROPOSED TOE ROCK

PROPOSED CROSS VANE

PROPOSED TOE ROCKPROPOSED FLOODPLAIN BENCH

PROPOSED FLOODPLAIN BENCH

PROPOSED TOE ROCK

PROPOSED BANK SHAPING

h:

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0\

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CA

D\ Pl an s\

AR

A

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_0

9_

Cr os s S ec tio ns

_A

RA

-9 .d w g-

B.

C

AM

P

CR

EE

K

SO

U

TH

C

RO

SS

S

EC

TI

O

N S

(1 O

F 7)

-5 /1

3/

:0

PM

-(t ba lm er

B.10

CAMP CREEK SOUTH CROSS

SECTIONS (1 OF 7)

NOTES:

1. CROSS SECTIONS ARE LEFT TO RIGHT

LOOKING DOWNSTREAM.

2. EXISTING GROUND (HEI SURVEY) SHOWS

LIDAR ABOVE EXISTING BASEFLOW

WATER SURFACE. EXISTING

BATHYMETRY BELOW BASEFLOW IS NOT

SHOWN.

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Cr os s S ec tio ns

_A

RA

-9 .d w g-

B.

C

AM

P

CR

EE

K

SO

U

TH

C

RO

SS

S

EC

TI

O

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(1 O

F 7)

-5 /1

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:0

PM

-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

9+75

0102030405060 0 -10 -20 -30 -40 -50 -60

10+45

0102030405060 0 -10 -20 -30 -40 -50 -60

11+26

0102030405060 0 -10 -20 -30 -40 -50 -60

11+95

0102030405060 0 -10 -20 -30 -40 -50 -60

12+55

0102030405060 0 -10 -20 -30 -40 -50 -60

13+15

0102030405060 0 -10 -20 -30 -40 -50 -60

13+55

0102030405060 0 -10 -20 -30 -40 -50 -60

14+35

0102030405060 0 -10 -20 -30 -40 -50 -60

1%

4:1

2:1

3:1

2:1

3:1

1%

5:1

3:1

2:1

1%4:1

3:1

2:1

1%

4:1 3:1

2:1

2:1

3:1

1%

5:1

2:1

3:1

PROPOSED FLOODPLAIN BENCHPROPOSED TOE ROCK

PROPOSED FLOODPLAIN BENCH

PROPOSED TOE ROCK

PROPOSED FLOODPLAIN BENCH

PROPOSED TOE ROCK

PROPOSED CROSS VANE

PROPOSED TOE ROCK

PROPOSED FLOODPLAIN BENCH PROPOSED TOE ROCK

PROPOSED TOE ROCK

PROPOSED FLOODPLAIN BENCH

PROPOSED TOE ROCK

EXISTING GROUND (HEI SURVEY)

h:

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0\

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Cr os s S ec tio ns

_A

RA

-9 .d w g-

B.

C

AM

P

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EE

K

SO

U

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C

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SS

S

EC

TI

O

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(2 O

F 7)

-5 /1

3/

:0

PM

-(t ba lm er

B.11

Date CAMP CREEK SOUTH CROSS

SECTIONS (2 OF 7)

NOTES:

1. CROSS SECTIONS ARE LEFT TO RIGHT

LOOKING DOWNSTREAM.

2. EXISTING GROUND (HEI SURVEY) SHOWS

LIDAR ABOVE EXISTING BASEFLOW

WATER SURFACE. EXISTING

BATHYMETRY BELOW BASEFLOW IS NOT

SHOWN.

h:

\J

BN

\0

0\

\0

3_ p ol k co un ty st re am s\

CA

D\ Pl an s\

AR

A

9\

_0

9_

Cr os s S ec tio ns

_A

RA

-9 .d w g-

B.

C

AM

P

CR

EE

K

SO

U

TH

C

RO

SS

S

EC

TI

O

N S

(2 O

F 7)

-5 /1

3/

:0

PM

-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

15+10

0102030405060 0 -10 -20 -30 -40 -50 -60

15+90

0102030405060 0 -10 -20 -30 -40 -50 -60

17+35

0102030405060 0 -10 -20 -30 -40 -50 -60

17+75

0102030405060 0 -10 -20 -30 -40 -50 -60

18+85

0102030405060 0 -10 -20 -30 -40 -50 -60

19+20

0102030405060 0 -10 -20 -30 -40 -50 -60

21+20

0102030405060 0 -10 -20 -30 -40 -50 -60

24+50

0102030405060 0 -10 -20 -30 -40 -50 -60

2:1

3:1

1%

5:1

2:1

3:1

4:1 1%

4:11%

2:1

3:1

PROPOSED ROCK RIFFLE

PROPOSED TOE ROCK

PROPOSED FLOODPLAIN BENCH

PROPOSED FLOODPLAIN BENCHPROPOSED TOE ROCK

PROPOSED FLOODPLAIN BENCH

PROPOSED CROSS VANE

PROPOSED TOE ROCK

EXISTING GROUND (HEI SURVEY)

PROPOSED TOE WOOD

PROPOSED TOE WOOD

3:1

3:1

10'

10' h:

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B.12

CAMP CREEK SOUTH CROSS

SECTIONS (3 OF 7)

NOTES:

1. CROSS SECTIONS ARE LEFT TO RIGHT

LOOKING DOWNSTREAM.

2. EXISTING GROUND (HEI SURVEY) SHOWS

LIDAR ABOVE EXISTING BASEFLOW

WATER SURFACE. EXISTING

BATHYMETRY BELOW BASEFLOW IS NOT

SHOWN.

h:

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Cr os s S ec tio ns

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B.

C

AM

P

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EE

K

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ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

25+65

0102030405060 0 -10 -20 -30 -40 -50 -60

27+00

0102030405060 0 -10 -20 -30 -40 -50 -60

27+80

0102030405060 0 -10 -20 -30 -40 -50 -60

2:1

3:1

3:1 1%

3:1

2:1

PROPOSED TOE ROCK

PROPOSED TOE ROCK

EXISTING GROUND (HEI SURVEY)

PROPOSED ISLAND EXCAVATION

h:

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(4 O

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-(t ba lm er

B.13

CAMP CREEK SOUTH CROSS

SECTIONS (4 OF 7)

NOTES:

1. CROSS SECTIONS ARE LEFT TO RIGHT

LOOKING DOWNSTREAM.

2. EXISTING GROUND (HEI SURVEY) SHOWS

LIDAR ABOVE EXISTING BASEFLOW

WATER SURFACE. EXISTING

BATHYMETRY BELOW BASEFLOW IS NOT

SHOWN.

h:

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D\ Pl an s\

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B.

C

AM

P

CR

EE

K

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U

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(4 O

F 7)

-5 /1

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-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

53+80

0102030405060 0 -10 -20 -30 -40 -50 -60

55+40

0102030405060 0 -10 -20 -30 -40 -50 -60

57+50

010203040 0 -10 -20 -30 -40 -50 -60 -70 -80

58+26

0102030405060 0 -10 -20 -30 -40 -50 -60

59+60

0102030405060 0 -10 -20 -30 -40 -50 -60

56+62

0102030405060 0 -10 -20 -30 -40 -50 -60

3:1

4:1 2:1

2:14:1 3:1

3:1

2:1

PROPOSED TOE ROCK

PROPOSED TOE ROCK

PROPOSED CROSS VANE

PROPOSED ROCK RIFFLE

EXISTING GROUND (HEI SURVEY)

PROPOSED TOE WOOD

PROPOSED BANK SHAPING

PROPOSED TOE ROCKPROPOSED BANK SHAPING

3:1

10'

56+04

0102030405060 0 -10 -20 -30 -40 -50 -60

PROPOSED TOE ROCK

2:1 1% h:

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-(t ba lm er

B.14

CAMP CREEK NORTH CROSS

SECTIONS (5 OF 7)

NOTES:

1. CROSS SECTIONS ARE LEFT TO RIGHT

LOOKING DOWNSTREAM.

2. EXISTING GROUND (HEI SURVEY) SHOWS

LIDAR ABOVE EXISTING BASEFLOW

WATER SURFACE. EXISTING

BATHYMETRY BELOW BASEFLOW IS NOT

SHOWN.

h:

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D\ Pl an s\

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_A

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-9 .d w g-

B.

C

AM

P

CR

EE

K

N O

RT

H

CR

O

SS

S

EC

TI

O N

S (5

O F

7) -5

/1 3/

:1

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-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS MITCHELL PARK

POLK COUNTY PUBLIC WORKS

101+63

0102030405060 0 -10 -20 -30 -40 -50 -60

101+78

0102030405060 0 -10 -20 -30 -40 -50 -60

101+90

0102030405060 0 -10 -20 -30 -40 -50 -60

102+14

0102030405060 0 -10 -20 -30 -40 -50 -60

104+45

0102030405060 0 -10 -20 -30 -40 -50 -60

105+00

0102030405060 0 -10 -20 -30 -40 -50 -60

107+68

0102030405060 0 -10 -20 -30 -40 -50 -60

107+94

0102030405060 0 -10 -20 -30 -40 -50 -60

3:1 2:1

3:1

3:1

2:1

3:1

2:1

3:1

2:1

2:1 2:1

PROPOSED STEP POOL

PROPOSED STEP POOL

PROPOSED STEP POOL

PROPOSED TOE ROCK

PROPOSED TOE ROCK

PROPOSED TOE ROCK

PROPOSED STEP POOL

PROPOSED BANK SHAPING

PROPOSED BANK SHAPING

PROPOSED TOE ROCK

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BU

TA

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(6 O

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-5 /1

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-(t ba lm er

ByDateRevisionNo.

B.15 PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

TRIBUTARY CROSS SECTIONS

(6 OF 7)5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9 THOMAS

MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

HEI NO. 0143-0009

NOTES:

1. CROSS SECTIONS ARE LEFT TO RIGHT

LOOKING DOWNSTREAM.

2. EXISTING GROUND (HEI SURVEY) SHOWS

LIDAR ABOVE EXISTING BASEFLOW

WATER SURFACE. EXISTING

BATHYMETRY BELOW BASEFLOW IS NOT

SHOWN.

108+70

0102030405060 0 -10 -20 -30 -40 -50 -60

109+35

0102030405060 0 -10 -20 -30 -40 -50 -60

110+55

0102030405060 0 -10 -20 -30 -40 -50 -60

111+00

0102030405060 0 -10 -20 -30 -40 -50 -60

2:1

2:1

3:1 2:1

2:1 3:1

3:1

PROPOSED TOE ROCK

PROPOSED ROCK RIFFLE

PROPOSED TOE ROCK

PROPOSED TOE ROCK

PROPOSED TOE ROCK

h:

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-(t ba lm er

ByDateRevisionNo.

B.16 PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

TRIBUTARY CROSS SECTIONS

(7 OF 7)5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9 THOMAS

MITCHELL PARK

POLK COUNTY PUBLIC WORKS

POLK COUNTY, IAAS SHOWN

HEI NO. 0143-0009

NOTES:

1. CROSS SECTIONS ARE LEFT TO RIGHT

LOOKING DOWNSTREAM.

2. EXISTING GROUND (HEI SURVEY) SHOWS

LIDAR ABOVE EXISTING BASEFLOW

WATER SURFACE. EXISTING

BATHYMETRY BELOW BASEFLOW IS NOT

SHOWN.

EXISTING CHANNEL ELEV. "C"

VA

RI

ES

SLO

PE

SLOPE

SLOPE

SLO

PE

FLOW

FLOW

FL

O

W

BOTTOM OF RIFFLE ELEV. "B"

30°

BA

N

KF

U

LL

L

O

CA

TI

O

N

30°

4H:1V 4H :1

V

5H :1

V

5H:1V

℄ CHANNEL

BANKFULL WIDTH "E"

5% S

LO

PE

O R

FL

AT

TE

R

TOP OF RIFFLE ELEV. "A"

50H:1V 50H:1V

VARIES10' MIN VARIES 10' MIN

5'5'

INTERSECTION OF

SIDESLOPE AND RIFFLE

(LOCATION VARIES)

INTERSECTION OF

SIDESLOPE AND RIFFLE

(LOCATION VARIES)

VA

RI

ES

AR

C

HE

IG

HT

"H

BA

N

KF

U

LL

L

O

CA

TI

O

N

OR FLATTER OR FLATTER

A A

EXISTING GROUND

(VARIES)

10' MIN TIE-IN

(NOTE 7)

VARIESDIMENSION "I"CHANNEL SIDE

WIDTH "G"

CHANNEL BOTTOM

WIDTH "F"

CHANNEL SIDE

WIDTH "G"

DIMENSION "I"VARIES10' MIN TIE-IN

(NOTE 7)

2' (M

IN

PROPOSED RIFFLE

BA

N

KF

U

LL

D

EP

TH

"D

CHANNEL

SEAL VOIDS IN

RIPRAP (NOTE 8)

2 FT THICK ROUNDED

CLASS "E" RIPRAP

FLOW

5% SLOPE OR FLATTER

EXISTING CHANNEL

ELEV "C"

EXCESS EXCAVATED

MATERIAL (NOTE 4)

4H:1V

5H:1V

℄ OF CHANNEL BOTTOM

OF RIFFLE ELEV "B"

℄ OF CHANNEL TOP

OF RIFFLE ELEV "A"

VARIES

VARIES

SECTION A-A

2 FT THICK CLASS "E" RIPRAPEXISTING GROUND

NOTE:

1. CHANNEL EXCAVATION MAY BE REQUIRED TO PLACE THE REQUIRED 2' MINIMUM THICKNESS OF IOWA ROUNDED CLASS "E" RIPRAP.

ALL CHANNEL EXCAVATION IS INCIDENTAL TO THE PRICE OF IOWA ROUNDED CLASS "E" RIPRAP.

2. IOWA ROUNDED CLASS "E' RIPRAP WILL BE USED AS NECESSARY TO CONSTRUCT A SUB-BASE TO A GRADE EQUAL TO THE BOTTOM OF THE IOWA ROUNDED CLASS "E" RIPRAP. IOWA ROUNDED CLASS "E" RIPRAP WILL BE PAID ON A PER CUBIC YARD BASIS UNDER THE

ROUNDED CLASS "E" RIPRAP BID ITEM.

3. IOWA ROUNDED CLASS "E" RIPRAP AT THE DOWNSTREAM END OF RIFFLE MUST BE SUBCUT INTO THE EXISTING CHANNEL TO A DEPTH

OF 2'.

4. EXCAVATED MATERIAL TO BE TEMPORARILY PLACED WITHIN THE WORKING EXTENTS. AFTER CONSTRUCTION OF THE ROCK RIFFLE, EXCESS MATERIAL WILL THEN BE PLACED IMMEDIATELY UPSTREAM OF THE RIFFLE ALONG THE 4H:1V UPSTREAM SLOPE.

5. ANY DISTURBED VEGETATED AREAS ARE REQUIRED TO BE SEEDED.

6. CLEARING AND GRUBBING WILL ONLY BE CONDUCTED AS NECESSARY TO CONSTRUCT THE RIFFLES. CLEARING AND GRUBBING IS

SUBSIDIARY TO MEASURED BID ITEMS.

7. TIE-IN TO BE CONSTRUCTED A MINIMUM 10 FEET HORIZONTALLY INTO THE EXISTING BANK. DISTURBED AREAS ALONG THE EXISTING BANK ARE TO BE RESTORED TO THE EXISTING CONDITION. ALL WORK ASSOCIATED WITH RESTORING THE EXISTING BANK WILL NOT BE

MEASURED FOR PAYMENT, RATHER WILL BE SUBSIDIARY TO MEASURED BID ITEMS.

8. VOIDS IN THE PLACED RIPRAP SHALL BE FILLED WITH CHINKING ROCK COMPRISED OF A WELL GRADED MIX OF LOCALLY HARVESTED AGGREGATE VARYING FROM THE NO. 40 SIEVE UP TO 3-INCH STONES. EXCESS CHANNEL EXCAVATION CAN BE USED FOR LOCALLY HARVESTED AGGREGATE WITH ENGINEER’S APPROVAL. THE CHINKING ROCK SHOULD FILL VOIDS TO KEEP FLOW ON TOP OF THE RIPRAP AND SHOULD NOT BE BLOWN OUT OF THE VOIDS. CHINKING ROCK QUANTITY IS ESTIMATED TO BE APPROXIMATELY 1 CY PER 1

CY OF RIPRAP. ENGINEER MAY REQUIRE ADDITIONAL AGGREGATE MIX TO BE INSTALLED.

9. CONTRACTOR MAY USE PARTIALLY CONSTRUCTED ROCK RIFFLE AS STREAM CROSSING UNTIL THE RIFFLE IS FULLY CONSTRUCTED. ANY

ADDITIONAL MATERIAL REQUIRED DUE TO CROSSING WILL BE INCIDENTAL.

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-5 /1

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:1

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-(t ba lm er

ByDateRevisionNo.

PROJECT NO. 0143-0009

SHEET

Scale

Drawn by Date

Checked by

TCB

CDI

5-13-2025

THOMAS MITCHELL STREAM RESTORATION PROJECT - ARA 9

THOMAS…