3-25-15_MAH751636C_Construction Plans_6-19-25.pdf

PDF 11 MB Posted Sep 30, 2025

Attached to: Mah751636C 25-15
Solicitation number: 009_RFB_WRBWL_CY25-15
Issued by: Lyon County, Iowa

About this file

Written by GovTribe AI · Oct 1, 2025

These are the construction documents for a Nutrient Reduction Wetland project in Mahaska County, Iowa, prepared by Shive-Hattery, Inc. for the Iowa Department of Agriculture and Land Stewardship (IDALS). The project involves constructing a wetland designed to reduce nutrient runoff, with a total drainage area of 181 acres and a wetland pool area of 1.99 acres. Key project components include a water control structure, principal spillway, drawdown structure, and various drainage tile modifications. The project will involve approximately 752 cubic yards of general excavation, 6,707 cubic yards of general earthfill, and installation of multiple drain tiles and structures. The normal pool elevation will be 746.00 feet, with a maximum pool depth of 10.16 feet and an estimated sediment storage capacity of 71 years.

The project will require extensive earthwork, including scarification and recompaction of soil layers, placement of clay liner, and topsoil respreading. Construction details include installing a five-strand barbed wire fence, a cattle gate, riprap aprons, and various seeding areas totaling 4.1 acres of pasture and 0.8 acres of structure seeding. The design includes multiple drainage tile connections, a 72" x 72" water control structure, a 24" drawdown riser, and a 42" reinforced concrete pressure pipe outlet. The project will utilize geotextile fabric, clean stone, and erosion control measures. Total project easement area is 7.79 acres, with construction expected to manage nutrient runoff and improve water quality in the watershed.

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STATE OF IOWA

MAHASKA COUNTY, IA

ENGINEER

SHIVE-HATTERY, INC

ATTN: MICHAEL OTTEN

4125 WESTOWN PARKWAY, SUITE 100

WEST DES MOINES, IOWA 50266

PH: (515) 223-8104

SITE ADDRESS:

2114 275TH ST OSKALOOSA, IA 52577

CONTACT/SITE INFORMATION:

IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

MIKE BOURLAND, PE

502 E. 9TH STREET

DES MOINES, IA, 50319

PH: (515) 242-6130

MIKE.BOURLAND@IOWAAGRICULTURE.GOV

MAH751636C WETLAND

IDALS

PROJECT

LOCATION

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PROJECT DRAWING COORDINATE SYSTEM:

HORIZONTAL: NAD83 IOWA STATE PLANE SOUTH ZONE (1401)

VERTICAL: NAVD88

UNITS: U.S. SURVEY FEET

PAGES, SHEETS OR DIVISIONS COVERED BY THIS SEAL:

My License Renewal Date is: DECEMBER 31, Printed or typed name:

License Number:

Signature: Date

I HEREBY CERTIFY THAT THIS ENGINEERING DOCUMENT DESCRIBED

BELOW 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.

ALL SHEETS

MICHAEL M. OTTEN

28012

CIVIL ENGINEER

NRCS NEM PART 505 CERTIFICATION

THE SIGNING PROFESSIONALS HEREBY CERTIFY

THAT, TO THE BEST OF THEIR PROFESSIONAL

KNOWLEDGE, JUDGEMENT, AND BELIEF, THESE

PLANS MEET APPLICABLE NRCS STANDARDS.

I O

W A D E P A R T M E NT O F

AGR

I C U L T UR E & L A N D S T EWA R D

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PROJECT

LOCATION

MAHASKA COUNTY

C O

THE ENGINEERING JOB CLASS IS IV

CONSTRUCTION

ENTRANCE

OSKALOOSA

KEOMAH VILLAGE

EDDYVILLE

OSKALOOSA, IA

2 MILES

NEW SHARON

NUTRIENT REDUCTION WETLAND

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Sheet List Table Sheet Number Sheet Title

C000 COVER SHEET

C001 PROJECT QUANTITIES & NOTES

CD01 EXISTING CONDITIONS & REMOVALS

C201 GRADING PLAN

C202 CUT-FILL PLAN

C301 EMBANKMENT PLAN & PROFILE

C302 PRINCIPAL SPILLWAY PLAN & PROFILE

C303 TILE PLAN & PROFILE

C304 WETLAND PLAN & PROFILE

C501 CONSTRUCTION DETAILS

C502 CONSTRUCTION DETAILS

C503 CONSTRUCTION DETAILS

C601 SEEDING PLAN

275TH ST

ONE-CALL TICKET NUMBER: _____________________________

CLIENT ACCEPTANCE

PRINTED NAME: _____________________________

SIGNATURE: _____________________________

6-19-2025

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ESTIMATED QUANTITIES:

GENERAL NOTES:

1. THE LOCATIONS OF UTILITY MAINS, STRUCTURES AND SERVICE

CONNECTIONS PLOTTED ON THIS DRAWING ARE APPROXIMATE ONLY AND

WERE OBTAINED FROM RECORDS MADE AVAILABLE TO SHIVE-HATTERY,

INC. THERE MAY BE OTHER EXISTING UTILITY MAINS, STRUCTURES AND

SERVICE CONNECTIONS NOT KNOWN TO SHIVE-HATTERY, INC. AND NOT

SHOWN ON THIS DRAWING. THE VERIFICATION OF EXISTENCE OF, AND THE

DETERMINATION OF THE EXACT LOCATION OF, UTILITY MAINS,

STRUCTURES AND SERVICE CONNECTIONS SHALL BE THE RESPONSIBILITY

OF THE CONSTRUCTION CONTRACTOR(S).

2. IOWA CODE 480, UNDERGROUND FACILITIES INFORMATION, REQUIRES

VERBAL NOTICE TO IOWA ONE-CALL 1-800-292-8989, NOT LESS THAN 48

HOURS BEFORE EXCAVATING, EXCLUDING WEEKENDS AND HOLIDAYS.

3. THE MEANS OF THE WORK AND THE SAFETY OF THE CONTRACTOR'S

EMPLOYEES ARE SOLELY THE RESPONSIBILITY OF THE CONTRACTOR.

4. NO WORK SHALL BE PERFORMED BEYOND THE PROJECT LIMITS WITHOUT

PRIOR AUTHORIZATION FROM THE OWNER'S REPRESENTATIVE.

5. REPLACE ANY PROPERTY MONUMENTS REMOVED OR DESTROYED BY

CONSTRUCTION. MONUMENTS SHALL BE SET BY A LAND SURVEYOR

REGISTERED TO PRACTICE IN THE STATE OF IOWA.

6. ALL DEBRIS AND TRASH ENCOUNTERED DURING CONSTRUCTION WITHIN

THE PROJECT LIMITS, OR DIRECTED BY THE ENGINEER, SHALL BE

PROPERLY DISPOSED OF.

7. CONTRACTOR IS RESPONSIBLE FOR ALL CONSTRUCTION DE-WATERING

THAT IS REQUIRED AT NO ADDITIONAL COST TO THE DIVISION.

8. REPAIR OR REPLACE DAMAGE TO EXISTING FACILITIES (TILE, UTILITIES,

FENCES, ETC.) DESIGNATED TO REMAIN, AT NO ADDITIONAL EXPENSE TO

THE OWNER. ALL AREAS DISTURBED BY CONSTRUCTION, INCLUDING

STAGING AREAS AND HAUL ROUTES, ARE TO BE REWORKED TO THEIR

EXISTING CONDITIONS AND SEEDED AT NO ADDITIONAL COST TO THE

DIVISION IF OUTSIDE OF PROJECT LIMITS AND NOT APPROVED BY

ENGINEER.

9. WORK WHICH DOES NOT CONFORM TO THE REQUIREMENTS OF THE

CONTRACT WILL BE CONSIDERED UNACCEPTABLE. UNACCEPTABLE WORK,

WHETHER THE RESULT OF POOR WORKMANSHIP, USE OF DEFECTIVE

MATERIALS, DAMAGE THROUGH CARELESSNESS OR ANY OTHER CAUSE,

FOUND TO EXIST PRIOR TO THE FINAL ACCEPTANCE OF THE WORK, SHALL

BE REMOVED AND REPLACED IN AN ACCEPTABLE MANNER, AS REQUIRED

BY THE OWNER AT THE CONTRACTOR'S EXPENSE.

10. WORK DONE CONTRARY TO THE INSTRUCTIONS OF THE OWNERS

REPRESENTATIVE, WORK DONE BEYOND THE LINES SHOWN ON THE PLANS

OR ANY EXTRA WORK DONE WITHOUT AUTHORITY WILL NOT BE PAID FOR.

11. A SHRINKAGE FACTOR OF 20% WAS ESTIMATED FOR THIS PROJECT. THE

CONTRACTOR SHALL MAKE CHANGES IN EARTHWORK AS NEEDED TO

ADJUST FOR INACCURACIES INHERENT WITH ESTIMATING THE SHRINKAGE

FACTOR. THESE CHANGES SHALL ONLY BE MADE AFTER CONSULTATION

AND APPROVAL BY THE ENGINEER AND DIVISION.

12. CONTOURS AND SPOT ELEVATIONS SHOWN ARE TO FINISHED GRADE.

13. THE CONTRACTOR SHALL KEEP ALL ROADS OPEN TO THROUGH TRAFFIC

AT ALL TIMES.

14. ALL WORK WITHIN THE PUBLIC RIGHT OF WAY SHALL BE COORDINATED

WITH THE GOVERNING AUTHORITY AND SHALL BE DONE IN ACCORDANCE

WITH THEIR STANDARDS.

15. SUBMIT MANUFACTURER'S CERTIFICATION AND MATERIAL DATA FOR ALL

MATERIALS DELIVERED TO THE PROJECT SITE AS REQUESTED BY THE

OWNERS REPRESENTATIVE.

16. CONSTRUCTION SURVEY STAKING WILL BE PAID FOR BY THE OWNER AND

PROVIDED BY THE ENGINEER. CONTROL POINTS WILL BE SET FOR USE

WITH GPS CONTROLLED GRADING, IF DESIRED. CONTRACTOR SHALL

PRESERVE STAKES TO THE EXTENT FEASIBLE. ANY RE-STAKING COSTS

WILL BE THE RESPONSIBILITY OF THE CONTRACTOR.

17. NEITHER SHIVE-HATTERY NOR IDALS GUARANTEE THIS PRACTICE WILL

HOLD A PERMANENT POOL OF WATER.

CULTURAL RESOURCES NOTE:

1. IF A CULTURAL RESOURCE IS IDENTIFIED

DURING CONSTRUCTION, STOP IMMEDIATELY

AND NOTIFY LOCAL NATURAL RESOURCES

CONSERVATION SERVICE OFFICE.

ESTIMATE REFERENCE NOTES:

WETLAND DESIGN DATA:

ITEM # SPEC # DESCRIPTION

1 IA CS-001

SITE STRIPPING & PREPARATION : THIS ITEM WILL CONSIST OF WORK TO REMOVE AND DISPOSE OF EXISTING MATERIAL TO REMOVE VEGETATION ON AREAS TO BE EXCAVATED OR FILLED. TOTAL DEPTH OF VEGETATIVE STRIPPING AND TOPSOIL STRIPPING SHALL EQUAL A COMBINED DEPTH OF 12", WITH THE ESTIMATED AMOUNT OF TOPSOIL REMOVAL BEING 7,489 CUBIC YARDS. THE TOPSOIL REPLACEMENT QUANTITY SHALL BE PAID SEPARATELY. THIS ITEM WILL ALSO INCLUDE ANY TREE AND BRUSH REMOVAL ALONG WITH ANY FENCES.

2 IA CS-001

CROP DAMAGE: THIS ITEM CONSISTS OF CROP DAMAGE THAT RESULTS FROM CONSTRUCTION ACTIVITIES. IT IS RECOMMENDED CONTRACTOR REMOVE CORN RESIDUE RATHER THAN KNOCK IT DOWN. PAYMENT FOR CROP DAMAGE WILL BE MADE TO THE NEAREST 0.1 ACRE AS MEASURED BY THE ENGINEER OR THEIR REPRESENTATIVE. THE UNIT RATE FOR CROP DAMAGE WILL BE DETERMINED BY THE DIVISION NEAR THE COMPLETION OF CONSTRUCTION AND ADDED TO THE CONTRACT WITH A CHANGE ORDER. PAYMENT WILL BE MADE TO CONTRACTOR WHO WILL PAY LANDOWNER.

3 IA CS-006 STRUCTURE & CHANNEL SEEDING: THIS ITEM INCLUDES SEEDING FOR ALL EMBANKMENT, AUXILARY SPILLWAY, TERRACE, AND TILE COVER BERM AREAS. INCLUDES SEEDBED PREP, SEEDING, MULCHING, AND FERTILIZER.

SEE SEEDING PLAN.

4 IA CS-006 PASTURE SEEDING: THIS ITEM INCLUDES SEEDING FOR ALL AREAS ABOVE NORMAL POOL AND WITHIN EASEMENT BOUNDARY, EXCLUDING THOSE AREAS WHERE STRUCTURE SEEDING IS SPECIFIED AND INCLUDES

SEEDBED PREP, SEEDING, MULCHING, AND FERTILIZER. SEE SEEDING PLAN.

5 CS-008

MOBILIZATION AND DEMOBILIZATION: THIS ITEM SHALL BE CONSIDERED FULL COMPENSATION TO MOBILIZE AND DEMOBILIZE THE CONTRACTOR'S FORCES AND EQUIPMENT FOR THE PROJECT. ALL OTHER WORK NECESSARY TO COMPLETE THE PROJECT AS REPRESENTED HEREIN BUT NOT INCLUDED IN THE ITEMS LISTED BELOW SHALL BE INCIDENTAL TO THIS ITEM. THIS ITEM SHALL INCLUDE ALL LABOR, MATERIALS, EQUIPMENT AND IOWA ONE CALL NOTIFICATIONS TO INSTALL SIGN PROVIDED BY IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP, AS SHOWN ON THE PLANS OR ON NEXT PAGE.

6 IA CS-009 DRAIN TILE INVESTIGATION AND REMOVAL: THIS ITEM INCLUDES THE EXPLORATORY EXCAVATIONS REQUIRED TO LOCATE AND REMOVE TILES SHOWN ON THE PLANS. THIS IS FULL COMPENSATION FOR EXCAVATION, BACKFILLING, AND REMOVAL OF THE TILE TRENCHES.

7 IA CS-021

EXCAVATION (GENERAL): THIS ITEM INCLUDES THE EXCAVATION OF MATERIAL REQUIRED TO CONSTRUCT THE CORE TRENCH BELOW THE EXISTING GROUND LEVEL, AS DETAILED, ALONG THE CENTERLINE OF PROPOSED DAM EMBANKMENT. TERMINATE CORE TRENCH IN SUITBALE IMPERVIOUS SOILS. CORE TRENCHES SHALL BE LEFT OPEN FOR INSPECTION BY THE ENGINEER. THIS ITEM ALSO INCLUDE REMOVAL OF ANY TILE LOCATE WITHIN THE CORE TRENCH EXTENDING 10 FEET BEYOND THE EMBANKMENT FOOTPRINT. TILE SHALL BE TRACED UPSTREAM AND DAYLIGHTED TO PROPOSED POOLS WHERE POSSIBLE. COORDINATE WITH THE ENGINEER

IF ADDITIONAL TILE WORK IS REQUIRED.

8 IA CS-023

EARTHFILL (GENERAL (P)): THIS ITEM INCLUDES THE AMOUNT OF MATERIAL REQUIRED TO CONSTRUCT THE SUBMERGED BERMS, ADDITIONAL FILL TO BE PLACED OVER TILE COVER BERMS, AND FILL PLACED ALONG THE SLOPE ON THE NORTH SIDE OF THE WETLAND POOL. COHESIVE MATERIAL FOUND DURING GENERAL GRADING AND COMPACTED LINER REMOVAL CAN BE USED FOR THESE AREAS. SAND AND GRAVEL FOUND ON SITE SHALL NOT BE USED FOR THIS EARTHFILL. SEE SHEET C201 AND C202 FOR LIMITS OF EXCAVATION AND ASSOCIATED FILL. THE REQUIRED FILL INCLUDES A 20% SHRINKAGE FACTOR. MEASUREMENT AND PAYMENT FOR PLACEMENT AND COMPACTION OF ALL FILL MATERIAL IS INCLUDED IN THIS ITEM AND WILL BE PAID BASED ON PLAN QUANTITY. COMPACTION SHALL BE NRCS METHOD 1. CONTRCTOR SHALL ASSIST ENGINEER WITH SOIL

TESTING PRIOR TO SEEDING/STABILIZATION.

9 IA CS-023

EARTHFILL (GENERAL DAM (P)): THIS ITEM INCLUDES THE EARTHFILL PLACEMENT AND COMPACTION NECESSARY TO CONSTRUCT THE PORTION OF THE EMBANKMENT THAT IS NOT THE EMBANKMENT CORE. COHESIVE MATERIAL FOUND DURING GENERAL GRADING AND COMPACTED LINER CAN BE USED FOR THIS AREA. SAND AND GRAVEL FOUND ON SITE SHALL NOT BE USED FOR FILL IN THESE AREAS. SEE SHEET C201 AND C202 FOR LIMITS OF EXCAVATION AND ASSOCIATED FILL. THE REQUIRED FILL INCLUDES A 20% SHRINKAGE FACTOR. REMOVE ALL BRICKS, ROCK FRAGMENTS, AND OTHER DELETERIOUS OBJECTS FROM FILL MATERIALS. FILL MATERIAL SHALL BE PLACED IN COMPACTED IN LIFTS NO MORE THAN 9" THICK. MEASUREMENT AND PAYMENT FOR PLACEMENT AND COMPACTION OF ALL FILL MATERIAL IS INCLUDED IN THIS ITEM AND WILL BE PAID

BASED ON PLAN QUANTITY. COMPACTION SHALL BE NRCS METHOD 1.

10 IA CS-023

EARTHFILL (DAM CORE (P)): THIS ITEM INCLUDES THE EARTHFILL PLACEMENT AND COMPACTION NECESSARY TO CONSTRUCT THE EMBANKMENT CORE WITHIN THE EMBANKMENT. COHESIVE MATERIAL TAKEN FROM DESIGNATED BORROW AREA SHOULD BE USED FOR THIS AREA. SAND AND GRAVEL SHALL NOT BE USED FOR THIS AREA. SEE SHEET C201 AND C202 FOR LIMITS OF EXCAVATION AND ASSOCIATED FILL. THE REQUIRED FILL INCLUDES A 20% SHRINKAGE FACTOR. REMOVE ALL BRICKS, ROCK FRAGMENTS, AND OTHER DELETERIOUS OBJECTS FROM FILL MATERIALS. FILL MATERIAL SHALL BE PLACED IN COMPACTED IN LIFTS NO MORE THAN 9" THICK. MEASUREMENT AND PAYMENT FOR PLACEMENT AND COMPACTION OF ALL FILL MATERIAL IS INCLUDED IN THIS ITEM AND WILL BE PAID BASED ON PLAN QUANTITY. COMPACTION SHALL BE NRCS METHOD 2.

11 IA CS-023

EARTHFILL (18" CLAY LINER, WETLAND BOTTOM, TWO 9" LIFTS (P)): THIS ITEM INCLUDES SCARIFICATION AND LOOSENING OF AN 18" LINER IN TWO LIFTS IN ALL EXCAVATED AREAS WITHIN THE WETLAND POOL. REMOVE AN ADDITIONAL 9" OF SOIL, SCARIFY AND RE-COMPACT 9" BELOW, REPLACE 9" AND RECOMPACT, MOISTURE CONDITIONING, AND COMPACTION OF THE WETLAND BOTTOM TO FORM A SEAL. CONTRACTOR SHALL REMOVE ROCKS LARGER THAN 6 INCHES. NOTIFY ENGINEER IMMEDIATELY IF SANDY SOILS ARE ENCOUNTERED. ITEM WILL BE PAID BASED ON PLAN QUANTITY.

12 IA CS-023

EARTHFILL (SCARIFY AND RECOMPACT 9" LAYER OF WETLAND BOTTOM AND EMBANKMENT FOOTPRINT (P)): THIS ITEM INCLUDES SCARIFICATION AND LOOSENING OF A 9 INCH SURFACE LAYER OF SOIL WITHIN THE WETLAND POOL BOTTOM AND EMBANKMENT FOOTPRINT WHERE EXCAVATION DOES NOT OCCUR, MOISTURE CONDITIONING, AND COMPACTION OF THE MATERIAL TO FORM A SEAL AND SOILD EMBANKMENT FOUNDATION.

CONTRACTOR SHALL REMOVE ROCKS LARGER THAN 6 INCHES. NOTIFY ENGINEER IMMEDIATELY IF SANDY SOILS ARE ENCOUNTERED. ITEM WILL BE PAID BASED ON PLAN QUANTITY.

13 IA CS-026 TOPSOIL PLACEMENT. 12 INCH: THIS ITEM INCLUDES THE RESPREAD OF 12" TOPSOIL WITHIN EMBANKMENT FOOTPRINT. ITEM WILL BE PAID BASED ON PLAN QUANTITY.

14 IA CS-026 TOPSOIL PLACEMENT. 6 INCH: THIS ITEM INCLUDES THE RESPREAD OF 6" TOPSOIL IN ALL OTHER DISTURBED AREAS. ITEM WILL BE PAID BASED ON PLAN QUANTITY.

15 IA CS-046 4" CORRUGATED PROFILE WALL (DUAL WALL, PERFORATED) POLYETHYLENE PIPE: THIS ITEM INCLUDES THE MATERIAL, EXCAVATION, PLACEMENT, JOINTING, AND BACKFILL OF THE 4" DUAL-WALL PERFORATED HDPE

DRAIN TILE. SEE SHEET C201 AND C303 FOR LENGTHS, LOCATIONS AND ELEVATIONS.

16 IA CS-046 6" CORRUGATED PROFILE WALL (DUAL WALL, PERFORATED) POLYETHYLENE PIPE: THIS ITEM INCLUDES THE MATERIAL, EXCAVATION, PLACEMENT, JOINTING, AND BACKFILL OF THE 6" DUAL-WALL PERFORATED HDPE

DRAIN TILE. SEE SHEET C201 AND C303 FOR LENGTHS, LOCATIONS AND ELEVATIONS.

17 IA CS-046 8" CORRUGATED PROFILE WALL (DUAL WALL, PERFORATED) POLYETHYLENE PIPE: THIS ITEM INCLUDES THE MATERIAL, EXCAVATION, PLACEMENT, JOINTING, AND BACKFILL OF THE 8" DUAL-WALL PERFORATED HDPE

DRAIN TILE. SEE SHEET C201 AND C303 FOR LENGTHS, LOCATIONS AND ELEVATIONS.

18 IA CS-046 10" CORRUGATED PROFILE WALL (DUAL WALL, PERFORATED) POLYETHYLENE PIPE: THIS ITEM INCLUDES THE MATERIAL, EXCAVATION, PLACEMENT, JOINTING, AND BACKFILL OF THE 10" DUAL-WALL PERFORATED HDPE

DRAIN TILE. SEE SHEET C201 AND C303 FOR LENGTHS, LOCATIONS AND ELEVATIONS.

19 IA- CS-045 12" HICKENBOTTOM RISER: THIS ITEM INCLUDES COSTS FOR THE MATERIAL AND INSTALLATION OF THE 12" HICKENBOTTOM RISER, TRASH RACK, AND BASE AS DETAILED.

20 IA CS-031 72" X 72" MODIFIED SW-403 WATER CONTROL STRUCTURE: THIS ITEM INCLUDES ALL LABOR, EQUIPMENT, AND MATERIALS FOR THE PLACEMENT OF THE 72" X 72" REINFORCED CONCRETE BOX STRUCTURE, FOOTING, STOPLOGS, STOPLOG STORAGE STRUCTURE, FABRICATION, PIPE CONNECTIONS, AND TRASH RACK. STRUCTURE SHALL BE IDOT SW-403 OR APPROVED EQUIVALENT.

21 IA CS-031 42" RCPP WETLAND OUTLET PIPE: THIS ITEM INCLUDES ALL LABOR, EQUIPMENT, MATERIALS REQUIRED FOR THE EXCAVATION, JOINTING, BACKFILL, AND THE PLACEMENT OF THE 42" REINFORCED CONCRETE PRESSURE PIPE AND GASKETS. THE 42" RCPP FLARED END SECTION IS INCLUDED IN THE REPORTED PIPE LENGTH, AND THE FLARED END SECTION AND ASSOCIATED CONCRETE FOOTING ARE INCIDENTAL TO THIS ITEM.

22 IA CS-045 24" NYLOPLAST DRAWDOWN RISER STRUCTURE: THIS ITEM INCLUDES ALL LABOR, EQUIPMENT, AND MATERIALS FOR THE PLACEMENT OF THE 24" NYLOPLAST RISER STRUCTURE, FOOTING, FABRICATION, PIPE

CONNECTIONS, AND TRASH RACK.

23 IA CS-046 18" CORRUGATED PROFILE WALL (DUAL WALL, NON-PERFORATED) POLYETHYLENE WETLAND DRAWDOWN PIPE: THIS ITEM INCLUDES ALL LABOR, EQUIPMENT, MATERIALS REQUIRED FOR THE EXCAVATION, JOINTING, BACKFILL,AND THE PLACEMENT OF THE 18" HDPE NON-PERFORATED DUAL-WALL PIPE.

24 IA- CS-045 6" PVC TILE OUTLETS (20 LF EACH): THIS ITEM INCLUDES THE COSTS FOR MATERIAL, EXCAVATION, PLACEMENT, JOINTING, BEDDING, RODENT GUARDS, AND BACKFILLING OF THE 20 LF 6" PVC END SECTION FOR THE PROPOSED FIELD TILE OUTLET TO THE WETLAND. 6" PVC OUTLET SECTIONS ARE FOR 4 INCH TILES.

25 IA- CS-045 8" PVC TILE OUTLETS (20 LF EACH): THIS ITEM INCLUDES THE COSTS FOR MATERIAL, EXCAVATION, PLACEMENT, JOINTING, BEDDING, RODENT GUARDS, AND BACKFILLING OF THE 20 LF 8" PVC END SECTION FOR THE PROPOSED FIELD TILE OUTLET TO THE WETLAND. 8" PVC OUTLET SECTIONS ARE FOR 6 INCH TILES.

26 IA- CS-045 10" PVC TILE OUTLETS (20 LF EACH): THIS ITEM INCLUDES THE COSTS FOR MATERIAL, EXCAVATION, PLACEMENT, JOINTING, BEDDING, RODENT GUARDS, AND BACKFILLING OF THE 20 LF 10" PVC END SECTION FOR THE PROPOSED FIELD TILE OUTLET TO THE WETLAND. 10" PVC OUTLET SECTIONS ARE FOR 8 INCH TILES.

27 IA- CS-045 12" PVC TILE OUTLETS (20 LF EACH): THIS ITEM INCLUDES THE COSTS FOR MATERIAL, EXCAVATION, PLACEMENT, JOINTING, BEDDING, RODENT GUARDS, AND BACKFILLING OF THE 20 LF 12" PVC END SECTION FOR THE PROPOSED FIELD TILE OUTLET TO THE WETLAND. 10" PVC OUTLET SECTIONS ARE FOR 10 INCH TILES.

28 IA CS-061

RIP RAP: THIS ITEM INCLUDES THE EXCAVATION AND PLACEMENT OF CLASS 'E' REVETMENT OVER GEOTEXTILE FABRIC AT THE LOCATIONS SHOWN ON THE PLANS. THIS ITEM INCLUDES TILE OUTLETS, FOREBAY ROCK CHECKS, WETLAND OUTLET CHANNEL. GEOTEXTILE FABRIC IS INCIDENTAL TO THIS ITEM. QUANTITY DETERMINATION IS BASED ON A UNIT WEIGHT OF 105 POUNDS PER CUBIC FOOT. PROVIDE WEIGHT TICKETS TO

OWNER'S REPRESENTATIVE.

29 IA CS-061 2" CLEAN STONE: THIS ITEMS INCLUDES PROCUREMENT, PLACEMENT AND SPREADING OF 2 INCH CLEAN STONE AT THE CONSTRUCTION ENTRANCE AND AS A STONE FILTER UNDERNEATH THE RIP RAP AT THE END OF THE WETLAND OUTLET PIPE.. QUANTITY DETERMINATION IS BASED ON A UNIT WEIGHT OF 130 POUNDS PER CUBIC FOOT.

30 IA CS-061 EROSION STONE: THIS ITEMS INCLUDES PROCUREMENT, PLACEMENT AND MOUNDING OF THE EROSION STONE AROUND THE DRAWDOWN INTAKE RISER. QUANTITY DETERMINATION IS BASED ON A UNIT WEIGHT OF 120

POUNDS PER CUBIC FOOT.

31 IA CS-062 CONCRETE GROUT: GROUT MIX SHALL BE AS SPECIFIED AND SHALL BE PLACED USING A CONCRETE PUMPER. GROUT SHALL FULLY ENCASE THE BOTTOM OF THE RIP RAP BUT NOT FULL TO THE TOP OF THE RIP RAP SO AS TO REDUCE THE ENERGY DISSIPATION CAPABILITIES. GROUT SHALL ONLY BE PLACED IN THE PRESENCE OF THE ENGINEER.

32 IA CS-005 POLLUTION CONTROL, SILT FENCE: THIS ITEM INCLUDES PROCUREMENT AND INSTALLATION OF SILT FENCE DITCH CHECKS AS SHOWN ON THE PLANS AND AS DETAILED.

33 IA CS-092 FIELD FENCE WITH GATE: THIS ITEM INCLUDES THE MATERIAL AND INSTALLATION OF NEW FIVE-STRAND BARBED WIRE FIELD FENCE AND CATTLE GATE AS SHOWN ON PLANS AND AS DETAILED.

# ITEM DESCRIPTION QUANTITY UNITS

1 SITE STRIPPING & PREPARATION 1 LS

2 CROP DAMAGE 0.0 AC

3 STRUCTURE & CHANNEL SEEDING 2.5 AC

4 PASTURE SEEDING 4.1 AC

5 MOBILIZATION AND DEMOBILIZATION 1 LS

6 DRAIN TILE INVESTIGATION AND REMOVAL 467 LF

7 EXCAVATION (GENERAL) 752 CY

8 EARTHFILL, (GENERAL (P)) 6,707 CY

9 EARTHFILL, (GENERAL DAM (P)) 5,442 CY

10 EARTHFILL, (DAM CORE (P)) 2,772 CY

11 EARTHFILL (18" CLAY LINER, WETLAND BOTTOM, TWO 9" LIFTS (P)) 3,045 CY

12 EARTHFILL (SCARIFY AND RECOMPACT 9" LAYER OF WETLAND BOTTOM AND EMBANKMENT FOOTPRINT (P)) 1,579 CY

13 TOPSOIL PLACEMENT, 12 INCH 925 CY

14 TOPSOIL PLACEMENT, 6 INCH 3,074 CY

15 4" CORRUGATED PROFILE WALL (DUAL WALL, PERFORATED) POLYETHYLENE PIPE 29 LF

16 6" CORRUGATED PROFILE WALL (DUAL WALL, PERFORATED) POLYETHYLENE PIPE 14 LF

17 8" CORRUGATED PROFILE WALL (DUAL WALL, PERFORATED) POLYETHYLENE PIPE 24 LF

18 10" CORRUGATED PROFILE WALL (DUAL WALL, PERFORATED) POLYETHYLENE PIPE 24 LF

19 12" HICKENBOTTOM RISER 1 EA

20 72" X 72" MODIFIED SW-403 WATER CONTROL STRUCTURE 1 EA

21 42" RCPP WETLAND OUTLET PIPE 140 LF

22 24" NYLOPLAST DRAWDOWN RISER STRUCTURE 1 EA

23 18" CORRUGATED PROFILE WALL (DUAL WALL, NON-PERFORATED) POLYETHYLENE WETLAND DRAWDOWN PIPE 37 LF

24 6" PVC TILE OUTLETS (20 LF EACH) 2 EA

25 8" PVC TILE OUTLETS (20 LF EACH) 1 EA

26 10" PVC TILE OUTLETS (20 LF EACH) 1 EA

27 12" PVC TILE OUTLETS (20 LF EACH) 1 EA

28 RIPRAP 320 TON

29 2" CLEAN STONE 85 TON

30 EROSION STONE 25 TON

31 CONCRETE GROUT 37 CY

32 POLLUTION CONTROL, SILT FENCE 1,490 LF

33 FIELD FENCE WITH GATE 1,408 LF

PROJECT ID 751636C -----

PRELIMINARY OR FINAL DESIGN FINAL DESIGN -----

DRAINAGE AREA 181.00 ACRES

WETLAND POOL AREA 1.99 ACRES

DEEP WATER AREA (>3 FT DEEP) 0.45 ACRES

NORMAL POOL ELEVATION 746.00 FEET

AVERAGE POOL DEPTH 2.53 FEET

MAXIMUM POOL DEPTH 10.16 FEET

POOL STORAGE 4.84 ACRE-FEET

BERM ELEVATION 753.50 FEET

BERM STORAGE 27.53 ACRE-FEET

LENGTH OF BERM 275.00 FEET

AUXILIARY SPILLWAY ELEVATION 751.00 FEET

AUXILIARY SPILLWAY WIDTH 30 FEET

PRINCIPAL SPILLWAY 72" X 72" RCP BOX RISER & 42” RCPP -----

DRAWDOWN SPILLWAY 24” NYLOPLAST RISER & 18” HDPE -----

HEIGHT OF DAM (BERM ELEVATION - OUTLET LOWEST ELEVATION) 22.5 FEET

TIME OF CONCENTRATION 0.51 HOURS

WEIGHTED RUNOFF CURVE NUMBER 80 -----

10-YEAR STORM DESIGN FLOW 362.40 CFS

10-YEAR FLOOD SURF. ELEVATION 750.28 FEET

25-YEAR STORM DESIGN FLOW 491.17 CFS

25-YEAR FLOOD SURF. ELEVATION 752.45 FEET

100-YEAR STORM DESIGN FLOW 711.82 CFS

100-YEAR FLOOD SURF. ELEVATION 752.99 FEET

ESTIMATED SEDIMENT STORAGE 71 YEARS

TOTAL EASEMENT AREA 7.79 ACRES

X X

C O

GRADING LIMITS (TYP.)

EXISTING STREAM

CENTERLINE

LOCATE, CRUSH, AND BURY ALL TILE WITHIN

PROPOSED WETLAND POOL. FOR TILE RUNNING

UNDER THE WETLAND BERM, REMOVE TILE AND

BACKFILL TRENCH WITH CLAY EXTENDING 10

FEET BEYOND THE FOOTPRINT OF THE BERM.

ABANDONED

WATER LINE

PROTECT ALL TILE TO REMAIN IN PLACE.

CONTRACTOR RESPONSIBLE FOR COSTS ASSOCIATED

WITH ANY DAMAGE CAUSED BY CONSTRUCTION AT NO

ADDITIONAL COST TO THE DIVISION. (TYP.)

LOCATE EXISTING TILE FOR CONNECTIONS TO PROPOSED TILE

WHERE ELEVATIONS ALLOW. CRUSH AND BURY 10 FEET (MIN) TILE

DOWNSTREAM AND CAP UPSTREAM END OF TILE TO REMAIN.

WHERE ELEVATIONS DO NOT ALLOW, BRIDGE EXISTING TILE OVER

OR UNDER PROPOSED TILE AND MAINTAIN TILE DRAINAGE

AROUND WETLAND. COORDINATE WITH ENGINEER.

PROPOSED DRAIN

TILE (TYP.)

GRANULAR TRACKOUT -

INSTALL 30 TONS OF 2"

CLEAN STONE 6" THICK

CONSTRUCTION ENTRANCE

- COORDINATE ROUTE

WITH LANDOWNER

APPROXIMATE PROPERTY

BOUNDARY (TYP.)

EXISTING

FENCE (TYP.)

EXISTING GAS LINE

5' X 5' CONCRETE BOX CULVERT

IE = 755.75

REMOVE 172 LF

OF EXISTING 8"

HDPE PIPE

REMOVE 182 LF

OF EXISTING 4"

HDPE PIPE

REMOVE 81 LF

OF EXISTING 4"

HDPE PIPE

REMOVE 32 LF OF

EXISTING 6" CMP

LOCATE EXISTING TILE FOR CONNECTIONS TO PROPOSED TILE

WHERE ELEVATIONS ALLOW. CRUSH AND BURY 10 FEET (MIN) TILE

DOWNSTREAM AND CAP UPSTREAM END OF TILE TO REMAIN.

WHERE ELEVATIONS DO NOT ALLOW, BRIDGE EXISTING TILE OVER

OR UNDER PROPOSED TILE AND MAINTAIN TILE DRAINAGE

AROUND WETLAND. COORDINATE WITH ENGINEER.

LANDOWNER:

BOENDER, BRIAN

JOHN & CASSIA MAE

LANDOWNER:

BOENDER, STEVEN

R LIVING TRUST

LANDOWNER:

FRYER, DWIGHT

LANDOWNER:

FRYER, DWIGHT

PROTECT NEIGHBORING

PRIVATE PROPERTY

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PROPERTY LINE (APPROX)

EXISTING CONTOUR - MAJOR

EXISTING CONTOUR - MINOR

LEGEND SURVEY NOTES:

1. LIMITED TOPOGRAPHIC SURVEY COMPLETED BY SHIVE-HATTERY ON

MAY 23, 2024.

2. SUPPLEMENTAL EXISTING SURFACE INFORMATION SHOWN WAS

BASED ON LIGHT DETECTION AND RANGING (LIDAR) INFORMATION

FROM IOWA DNR (2020).

3. CONTRACTOR SHALL VERIFY CONTROL AND BASE SURFACE PRIOR

TO CONSTRUCTION AND COORDINATE WITH ENGINEER.

COORDINATE SYSTEM AND DATUM:

HORIZONTAL DATUM - NAD83, IOWA STATE PLANE, SOUTH ZONE

VERTICAL DATUM - NAVD88

EXISTING DRAIN TILE

EXISTING FENCE X X X X

SOIL BORING

SOILS NOTES:

1. TOTAL DEPTH OF VEGETATIVE STRIPPING AND TOPSOIL STRIPPING SHALL EQUAL A COMBINED

DEPTH OF 12" IN ALL DISTURBED AREAS. RESPREAD 12" WITHIN EMBANKMENT FOOTPRINT AND 6"

(MIN) IN ALL OTHER DISTURBED AREAS.

2. SCARIFY AND RE-COMPACT 9 INCHES OF SOIL IN ENTIRE WETLAND AND EMBANKMENT

FOOTPRINT. ADDITIONALLY, IN EXCAVATED AREAS WITHIN THE POOL, AN ADDITIONAL 9 INCHES OF SOIL. SCARIFY AND RE-COMPACT 9 INCHES BELOW, REPLACE 9 INCHES, AND RE-COMPACT (18

INCH LINER IN TWO LIFTS). RESPREAD TOPSOIL AFTER COMPLETION.

3. A GEOTECHNICAL REPORT WAS PREPARED BY TERRACON ON MARCH 24, 2025.

PROPOSED DRAIN TILE

NORMAL WATER LEVEL

EXISTING STREAM

DRAIN TILE REMOVAL

100-YR STORM BOUNCE

0 4:1

4:1

5:1

4:1

5:1

2+ 50 X

X X

IE = 731.00

PRINCIPAL SPILLWAY PIPE 140 LF @ 5.00%

42" RCPP

NORMAL WATER LEVEL

ELEVATION = 746.00

AREA = 2.0 ACRES

TOP OF DAM

TOP WIDTH = 14 FEET

ELEVATION = 753.50

AREA = 4.3 ACRES

AUXILIARY SPILLWAY

ELEVATION = 751.00

DEPTH = 2.5 FEET

BOTTOM WIDTH = 30 FEET

SIDE SLOPES = 4:1

EXISTING FENCE

5' X 5' CONCRETE

BOX CULVERT

IE = 755.75

GROUTED CLASS 'E' RIP RAP APRON

- INSTALL 175 TONS OF CLASS 'E'

RIPRAP 2' THICK OVER 55 TONS OF

2" CLEAN STONE 6" THICK.

TOTAL GROUT = 37 CY

APPROXIMATE LOCATION OF

ABANDONED WATER LINE

SEDIMENT FOREBAY

TOP WIDTH = 45 FEET

TOP LENGTH = 90 FEET

DEPTH = 7 FEET

GRADING LIMITS (TYP.)

INSTALL 65 TONS OF CLASS 'E'

RIPRAP 2' THICK OVER

NON-WOVEN GEOTEXTILE FABRIC

INSTALL 25 TONS OF EROSION

STONE MOUNDED AROUND

INTAKE RISER, PLACE WITH CARE

TO ENSURE INTEGRITY OF RISER

SUBMERGED BERMS

TOP ELEV = 745.50

TOP WIDTH = 10 FEET

INSTALL 30 TONS OF CLASS 'E'

RIPRAP 2' THICK OVER

NON-WOVEN GEOTEXTILE FABRIC

CROSS-SECTION

CENTERLINE ALIGNMENT

- SEE PROFILE

DRAWDOWN PIPE 37 LF @ 0.00%

18" DUAL-WALL HDPE

72" X 72" RCP WATER CONTROL STRUCTURE

RIM = 746.00

42" RCPP IE = 738.00

18" DUAL-WALL HDPE IE = 738.00

INSTALL 1,408 LF OF FIVE-STRAND

BARBED WIRE FENCE

- SEE DETAIL

INSTALL 16' WIDE

CATTLE GATE

- SEE DETAIL

LANDOWNER:

BOENDER, BRIAN

JOHN & CASSIA MAE

LANDOWNER:

BOENDER, STEVEN

R LIVING TRUST

LANDOWNER:

FRYER, DWIGHT

LANDOWNER:

FRYER, DWIGHT

24" NYLOPLAST DRAWDOWN RISER

RIM = 745.50

18" DUAL-WALL HDPE IE = 738.00

TOP OF 3' TALL TERRACE

100-YEAR STORM BOUNCE

ELEVATION = 752.99

AREA = 4.0 ACRES

ST 3.2 29 LF @ 2.04%

4" DUAL WALL HDPE

ST 1.2 24 LF @ 2.26%

8" DUAL WALL HDPE

ST 2.2 14 LF @ 2.98%

6" DUAL WALL HDPE

ST 5.1 20 LF @ 9.94%

6" PVC TILE OUTLET

INSTALL 10 TONS OF

CLASS 'E' RIPRAP

IE = 747.00

ST 4.2 24 LF @ 1.14%

10" DUAL WALL HDPE

ST 1.1 20 LF @ 2.26%

10" PVC TILE OUTLET

INSTALL 10 TONS OF

CLASS 'E' RIPRAP

IE = 747.00

ST 3.1 20 LF @ 2.04%

6" PVC TILE OUTLET

INSTALL 10 TONS OF

CLASS 'E' RIPRAP

IE = 747.00

ST 2.1 20 LF @ 2.98%

8" PVC TILE OUTLET

INSTALL 10 TONS OF

CLASS 'E' RIPRAP

IE = 747.00

ST 4.1 20 LF @ 1.14%

12" PVC TILE OUTLET

INSTALL 10 TONS OF

CLASS 'E' RIPRAP

IE = 747.00

12" HICKENBOTTOM RISER 12" HICKENBOTTOM RISER

RIM = 753.00

10" DUAL WALL HDPE IE = 747.50

200+00

201+00

202+00

202+50

EXISTING GRADE

PROPOSED GRADE

WETLAND NWL = 746.00

WAVE BENCH

PROPOSED 3' TERRACE

10' WIDE BENCH

10'

EXISTING CONTOUR - MAJOR

EXISTING CONTOUR - MINOR

EXISTING STREAM

PROPOSED LINE TYPEDESCRIPTION

TOP OF DAM ELEVATION

NORMAL WATER ELEVATION

MAJOR CONTOUR

MINOR CONTOUR

PROPOSED DUAL WALL TILE

EXISTING TILE

LEGEND

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TILE NOTES

1. THE INVERT ELEVATIONS FOR PROPOSED DRAIN TILES

ON THIS PLAN ARE BASED ON ASSUMED DEPTHS OF

EXITING DRAIN. CONTRACTOR TO LOCATE AND

CONNECT PROPOSED DRAIN TILES TO EXISTING TILES,

COORDINATE WITH ENGINEER.

2. MAINTAIN A MINIMUM OF 3' OF COVER OVER TOP OF

PROPOSED TILES AND A MINIMUM SLOPE OF 1.00%.

WETLAND PARAMETERS

DRAINAGE AREA = 181 ACRES

NORMAL POOL AREA = 2.0 ACRES

SA/DA RATIO = 1.10%

HYDRAULIC PARAMTERS

TOP OF BERM ELEVATION = 753.50

AUXILIARY SPILLWAY ELEVATION = 751.00

NORMAL WATER ELEVATION = 746.00

STORAGE AT NWL = 4.84 ACRE-FEET

STORAGE AT TOP OF DAM = 27.53 ACRE-FEET

FIELD FENCE X X X

HORIZONTAL:VERTICAL:

100-YR STORM BOUNCE

X X

SCARIFY 9" BELOW, REPLACE 9" &

COMPACT WITHIN AREAS OF

BORROW WITHIN POOL AREA

SCARIFY 9" & RE-COMPACT

WITHIN ENTIRE POOL AREA

CONTRACTOR TO ASSIST

ENGINEER WITH SOIL TESTS IN

BORROW/EMBANKMENT AREA.

APPLY LIME PER LAB

RECOMMENDATIONS IF NEEDED.

CONTRACTOR TO ASSIST ENGINEER

WITH SOIL TESTS IN BORROW/SLOPE

FILL AREA. APPLY LIME PER LAB

RECOMMENDATIONS IF NEEDED.

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ELEVATIONS TABLE

CUT/FILL

MINIMUM

ELEVATION (FT)

MAXIMUM

ELEVATION (FT) COLOR

CUT -12 -10

CUT -10 -8

CUT -8 -6

CUT -6 -4

CUT -4 -2

CUT -2 0

FILL 0 2

FILL 2 4

FILL 4 6

FILL 6 8

FILL 8 10

FILL 10 12

FILL 12 14

FILL 14 16

FILL 16 18

FILL 18 20

FILL 20 22

EARTHWORK TABLE

CLASSIFICATION CY

EXCAVATION (GENERAL) 752

EARTHFILL (GENERAL) 6,707

EARTHFILL (GENERAL DAM) 5,442

EARTHFILL (DAM CORE) 2,772

EARTHFILL (18" CLAY LINER, WETLAND BOTTOM,

TWO 9" LIFTS) 3,045

EARTHFILL (SCARIFY AND RECOMPACT 9" LAYER OF

WETLAND BOTTOM AND EMBANKMENT FOOTPRINT) 1,579

NOTE: A 20% SHRINKAGE FACTOR WAS USED FOR EARTHWORK CALCULATIONS

20+00 21+00 22+00 23+00 24+00

5:1

X X

EMBANKMENT

CENTERLINE ALIGNMENT

72" X 72" RCP WATER CONTROL STRUCTURE

RIM = 746.00

.0 0%

" R

DRAWDOWN PIPE 37 LF @ 0.00%

18" DUAL-WALL HDPE

AUXILIARY SPILLWAY

ELEV = 751.00

BOTTOM WIDTH = 30 FEET

20+00

21+00

22+00

23+00

24+00

AUXILIARY SPILLWAY

ELEV = 751.00

BOTTOM WIDTH = 30 FEET

PROPOSED TOP OF DAM

ELEV = 753.50

OVERBUILD EMBANKMENT

TO ELEVATION OF 754.60

PROPOSED

GROUND (TYP.)

EXISTING

GROUND (TYP.)

NORMAL WATER LEVEL

ELEV = 746.00

42" RCPP PRINCIPAL

SPILLWAY PIPE

CORE TRENCH

- SEE DETAIL

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Sh ive

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HORIZONTAL SCALE:

VERTICAL SCALE:

30+00

31+00

32+00

135.00°'

72" X 72" RCP WATER CONTROL STRUCTURE

RIM = 746.00

24" NYLOPLAST DRAWDOWN RISER

RIM = 745.50

PRINCIPAL SPILLWAY PIPE 140 LF @ 5.00%42" RCPP

DRAWDOWN PIPE 37 LF @ 0.00%

18" DUAL-WALL HDPE

PRINCIPAL SPILLWAY

CENTERLINE ALIGNMENT

IE = 731.00

GROUTED CLASS 'E' RIP RAP

APRON - INSTALL 175 TONS OF

CLASS 'E' RIPRAP 2' THICK OVER 55

TONS OF 2" CLEAN STONE 6" THICK.

TOTAL GROUT = 37 CY

INSTALL 25 TONS EROSION

STONE MOUNDED AROUND

INTAKE RISER. PLACE WITH CARE

TO ENSURE INTEGRITY OF RISER

PROTECT NEIGHBORING

PRIVATE PROPERTY

EXCAVATE 20' CHANNEL FOR

DRAWDOWN STRUCTURE.

ELEV = 741.00

30+00

31+00

32+00

33+00

PRINCIPAL SPILLWAY PIPE 140 LF @ 5.00%

42" RCPP

72" X 72" RCP WATER CONTROL STRUCTURE

RIM = 746.00

IE = 738.00 42" RCPP (W)

IE = 738.00 18" DUAL-WALL HDPE (E)

IE = 731.00

14.00'

TOP WIDTH

DRAWDOWN PIPE 37 LF @ 0.00%

18" DUAL-WALL HDPE

24" NYLOPLAST DRAWDOWN RISER

RIM = 745.50

IE = 738.00 18" DUAL-WALL HDPE (W)

TOP OF DAM

ELEV = 753.50

10' WIDE

WAVE BENCH

NWL = 746.00

GROUTED CLASS 'E' RIP RAP APRON

- INSTALL 175 TONS OF CLASS 'E'

RIPRAP 2' THICK OVER 55 TONS OF

2" CLEAN STONE 6" THICK.

TOTAL GROUT = 37 CY

INSTALL 25 TONS EROSION STONE

MOUNDED AROUND INTAKE RISER. PLACE

WITH CARE TO ENSURE INTEGRITY OF RISER

INSTALL SEVEN 6' X 6'

ANTI-SEEP COLLARS

MAX SPACING = 15 FEET

- SEE DETAIL

9' X 9' CONCRETE BASE

TOP = 737.25

BOTTOM = 736.25

- SEE DETAIL

TRASH RACK AND

ANTI-VORTEX DEVICE

- SEE DETAIL

CORE TRENCH

- SEE DETAIL

EXISTING GRADE (TYP.)

PROPOSED GRADE (TYP.)

6' X 6' CONCRETE BASE

TOP = 737.87

BOTTOM = 736.87

- SEE DETAIL

TRASH RACK

- SEE DETAIL

CONCRETE FLARED

END SECTION FOOTING

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X X

40+00 41+00

ST 1.2 24 LF @ 2.26%

8" DUAL WALL HDPE

IE = 748.00

REMOVE EXISTING

8" FIELD TILE

EXISTING 8"

FIELD TILE

ST 1.1 20 LF @ 2.26%

10" PVC TILE OUTLET

INSTALL 10 TONS

CLASS 'E' RIPRAP

IE = 747.00

40+00

41+00

ST 1.2 25 LF

8" DUAL WALL HDPE @ 2.26%

ST 1.1 20 LF @ 2.26%

10" PVC TILE OUTLET

IE = 747.00

CONNECT TO EXISTING 8" FIELD TILE.

FIELD VERIFY EXISTING INVERT

ELEVATION AND ADJUST AS NEEDED.

MAINTAIN MINIMUM SLOPE OF 1.0%

X X

50+00 51+00

ST 2.2 14 LF @ 2.98%

6" DUAL WALL HDPE

IE = 748.00

EXISTING

FIELD TILE

REMOVE EXISTING

FIELD TILE

ST 2.1 20 LF @ 2.98%

8" PVC TILE OUTLET

INSTALL 10 TONS

CLASS 'E' RIPRAP

IE = 747.00

50+00

51+00

ST 2.2 14 LF

6" DUAL WALL HDPE @ 2.98%

ST 2.1 20 LF @ 2.98%

8" PVC TILE OUTLET

IE = 747.00

CONNECT TO EXISTING 6" FIELD TILE.

FIELD VERIFY EXISTING INVERT

ELEVATION AND ADJUST AS NEEDED.

MAINTAIN MINIMUM SLOPE OF 1.0%

X X

60+00 61+00

ST 3.2 29 LF @ 2.04%

4" DUAL WALL HDPE

IE = 748.00

EXISTING

FIELD TILE

REMOVE EXISTING

FIELD TILE

ST 3.1 20 LF @ 2.04%

6" PVC TILE OUTLET

INSTALL 10 TONS

CLASS 'E' RIPRAP

IE = 747.00

60+00

61+00

ST 3.2 30 LF

4" DUAL WALL HDPE @ 2.04%

ST 3.1 20 LF @ 2.04%

6" PVC TILE OUTLET

IE = 747.00

CONNECT TO EXISTING 4" FIELD TILE.

FIELD VERIFY EXISTING INVERT

ELEVATION AND ADJUST AS NEEDED.

MAINTAIN MINIMUM SLOPE OF 1.0%

3+ 00201+00

0+00 1+00

ST 4.2 24 LF @ 1.14%

10" DUAL WALL HDPE

12" HICKENBOTTOM RISER 12" HICKENBOTTOM RISER

RIM = 753.00

IE = 747.50 10" DUAL WALL HDPE (S)

ST 4.1 20 LF @ 1.14%

12" PVC TILE OUTLET

INSTALL 10 TONS

CLASS 'E' RIPRAP

IE = 747.00

0+00

1+00

ST 4.2 24 LF

10" DUAL WALL HDPE @ 1.14%

12" HICKENBOTTOM RISER

RIM = 753.00

FL ELEV = 751.00

IE = 747.50 10" DUAL WALL HDPE S

ST 4.1 20 LF @ 1.14%

12" PVC TILE OUTLET

IE = 747.00

4:1

X X

70+00 71+0071+00

IE = 749.00

EXISTING

FIELD TILE

REMOVE EXISTING

FIELD TILE

ST 5.1 20 LF @ 9.94%

6" PVC TILE OUTLET

INSTALL 10 TONS

CLASS 'E' RIPRAP

IE = 747.00

70+00

71+00

ST 5.1 20 LF @ 9.94%

6" PVC TILE OUTLET

IE = 747.00

CONNECT TO EXISTING 4" FIELD TILE.

FIELD VERIFY EXISTING INVERT

ELEVATION AND ADJUST AS NEEDED.

MAINTAIN MINIMUM SLOPE OF 1.0%

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\U se rs

\m ot te n\

Do cs \S hi ve

-H at te ry

, I nc

-\2

- B oe nd er M

C W et la nd \P ro je ct F ile s\

Sh ive

-H at te ry

\1 _C ivi l\C

- P

.d wg

RTH

A B C D E F

W es to w n Pk w y, S ui te

W es t D es

M oi ne s, Io w a

w w w

.s hi ve -h at te ry .c om

Io w a

Il lin oi s

In di an a

N eb ra sk a

W is co ns in

IOWA D

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A G R I C U L T URE

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HORIZONTAL SCALE:

VERTICAL SCALE:

HORIZONTAL SCALE:

VERTICAL SCALE:

HORIZONTAL SCALE:

VERTICAL SCALE:

HORIZONTAL SCALE:

VERTICAL SCALE:

HORIZONTAL SCALE:

VERTICAL SCALE:

N O

TH NO

RTH N

TH NO

RTH

4:1

5:1

0+00

1+00

2+00

3+00

4+00

5+00

6+00

7+00 8+00

9+00

10+00

X X

X X X X

X X

X X X X

X X X

X X X X X X X X X X X X X X X X X X X X X X X X X X

X X X X X X X X X X X X X

WETLAND CENTERLINE

ALIGNMENT

0+00

1+00

2+00

3+00

4+00

5+00

6+00

7+00

8+00

9+00

10+00

TOP OF EMBANKMENT

ELEV = 753.50

10' WIDE WAVE BENCH

SUBMERGED BERMS

TOP ELEV = 745.50

TOP WIDTH = 10 FEET

NORMAL WATER LEVEL

ELEV = 746.00

PROPOSED

GROUND (TYP.)

EXISTING

GROUND (TYP.)

PROPOSED

WETLAND FOREBAY

INSTALL 65 TONS OF CLASS 'E'

RIPRAP 2' THICK OVER

NON-WOVEN GEOTEXTILE FABRIC

INSTALL 30 TONS OF CLASS 'E'

RIPRAP 2' THICK OVER

NON-WOVEN GEOTEXTILE FABRIC

GROUTED CLASS 'E' RIP RAP APRON

- INSTALL 175 TONS OF CLASS 'E'

RIPRAP 2' THICK OVER 55 TONS OF

2" CLEAN STONE 6" THICK.

TOTAL GROUT = 37 CY

D R

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Pr in te d: C304

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Sh ive

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- P

.d wg

NORTH

A B C D E F

W es to w n Pk w y, S ui te

W es t D es

M oi ne s, Io w a

w w w

.s hi ve -h at te ry .c om

Io w a

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IOWA D

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A G R I C U L T URE

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TEWARDSHIP

EXISTING SOIL SURFACE

16" HOLES LOCATED AS SHOWN,

PRE-PUNCHED BY SIGN

FABRICATOR. FASTEN SIGN TO

POSTS WITH 3/8" DIA. STEEL BOLT &

NUT SET, SEE BOLT, WASHER, &

NUT FASTENER DETAIL THIS SHEET

(4 SETS REQ'D. PROVIDED AND

INSTALLED BY CONTRACTOR).

SIGN PANEL TO BE 0.080" THICK

ALUMINUM SUBSTRATE WITH 3M (OR

EQUAL) ENGINEER GRADE REFLECTIVE

SHEETING. SIGN PANELS FURNISHED BY

THE DIVISION OF SOIL CONSERVATION.

SIGN PANEL INSTALLED BY CONTRACTOR.

BACKFILL WITH CONCRETE

(PREFERRED), CLEAN STONE

(ACCEPTABLE), OR HAND-TAMPED

EARTH IN SMALL LIFTS (SUBJECT

TO ENGINEER'S APPROVAL)

2 EACH OF 4"x4"x12'

PRESSURE-TREATED POST

(TYP.). POSTS SEALED WITH

THOMPSON'S WATER SEAL OR

EQUAL. POSTS, SEALANT, AND

INSTALLATION PROVIDED BY

CONTRACTOR.

SIGNAGE NOTES:

1. DIVISION WILL FURNISH SIGN PANEL. CONTRACTOR IS RESPONSIBLE FOR PROVIDING POSTS, HARDWARE, AND INSTALLATION.

2. ALL EXPOSED WOOD SHALL BE SEALED WITH THOMPSON'S WATER SEAL OR EQUAL MEETING ASTM D-4446-08.

3. ALL STEEL HARDWARE PIECES SHALL BE GALVANIZED OR RUST RESISTANT.

4. NYLON AND STEEL WASHERS SHALL BE USED AS SHOWN ON THE BOLT, WASHER, NUT FASTENER

DETAIL ABOVE.

5. CLEAR UTILITIES WITH IOWA ONE-CALL (800) 292-8989 BEFORE EXCAVATING FOR POSTS.

6. SECURE DIVISION AND LANDOWNER APPROVAL FOR SIGN LOCATION BEFORE INSTALLATION.

7. COSTS FOR POSTS, HARDWARE, WOOD SEALANT AND SIGN INSTALLATION SHALL BE INCIDENTAL TO

MOBILIZATION.

8. CONTRACTOR SHALL INSTALL SIGN POSTS USING A PLYWOOD OR OTHER SUITABLE TEMPLATE TO MAINTAIN ACCURATE POST SPACING AND ALIGNMENT DURING BACKFILLING OF THE POST HOLES. TO AVOID BENDING OF THE SIGN PANELS, POSTS SHALL NOT BE INSTALLED OR BACKFILLED WITH SIGN

PANELS ATTACHED.

9. ONE (1) PROJECT SIGN IS REQUIRED UNLESS NOTED OTHERWISE.

TOP

PANEL

30"

48" 9"

3" (T

BOLT, WASHER, &

NUT

FASTENER DETAIL

NOT TO SCALE

STEEL

WASHER

HEAD

NYLON WASHER

AGAINST FACE OF SIGN

STEEL WASHER

BACK OF POST NUT

G N

D R

O R

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O O

T N

N O

Pr in te d: C501

S G

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\U se rs

\m ot te n\

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Sh ive

-H at te ry

\1 _C ivi l\C

- C O

O N

dw g

A B C D E F

W es to w n Pk w y, S ui te

W es t D es

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In di an a

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W is co ns in

IOWA D

A R

E NT O F

A G R I C U L T URE

L A

TEWARDSHIP

NWL = 746.00

PROPOSED GROUND

EXISTING GROUND (VARIES)

ELEV = 745.75

10' MINIMUM

REFER TO GRADING PLAN

WAVE BENCH

A1 WAVE PROTECTION BENCH AT NWL

ELEV = 746.25

EXISTING GROUND

TIE INTO EXISTING TILE AS DETAILED

- FIELD VERIFY LOCATION AND DEPTHS

NWL = 746.00

PROPOSED GROUND

LAST 20 LF SHALL BE PVC

WITH RODENT GUARD

1 SIZE LARGER THAN PROPOSED TILE

PE FIELD TILE -

SEE PLANS FOR LENGTHS AND

LOCATIONS

PROPOSED GROUND

CONCRETE CONNECTION

MATCH INVERTS

D3 TILE OUTLET AT WETLAND

MATCH INVERTS

2D INSTALL APPROPRIATELY SIZED FERNCO OR

APPROVED EQUIVALENT COUPLER AND

CONCRETE COLLAR OF 3,000 PSI MINIMUM STRENGTH

CONCRETE, MINIMUM 2D WIDE CENTERED ON JOINT,

MIN 6'' THICKNESS FOR FULL 2D WIDTH. THICKNESS

CAN TAPER DOWN BEYOND THE 2D WIDTH.

FlowFlow

NEW SECTION OF TILE

EXISTING TILE

A2 FIELD TILE REPAIR CONNECTION IE = 747.00

A4 PROJECT SIGN

'A2 FIELD TILE REPAIR CONNECTION

D4 SILT FENCE

FRONT VIEW

8' SPACING

" M

NOTES:

10' MIN.

"T " S

C E

'-0

" M

" S

5' MAX 5' MAX 5' MAX 5' MAX

VARIABLE (20' FOR NORMAL 10' DITCH)

STEEL POST TO BE

EMBEDDED 28" BELOW

TRENCH BOTTOM

GROUND LINE

ENGINEERING FABRIC

FLOW

TRENCH AND COMPACTED

BACKFILL 12" MIN DEPTH

4" MIN WIDTH

ENGINEERING FABRIC

TO BE FOLDED ACROSS

BOTTOM OF TRENCH

NORMAL FORESLOPE

1' ABOVE GROUND

NORMAL

BACKSLOPE

2" RISE IN

FENCE

FOLD FABRIC TO

FIT TRENCH

POST

WIRE

CORD

NOTE: TWIST CORD AND

PLACE AROUND POST,

SECURE WITH WIRE.

SECURE TOP OF ENGINEERING

FABRIC TO STEEL POST.

ENGINEERING FABRIC TO BE

PLACED TO BOTTOM OF TRENCH.

ENGINEERING FABRIC SHALL

HAVE A MINIMUM 36" WIDTH.

POST

WIRE

CORD

FABRIC

GROUND

LINE

ENGINEERING

FABRIC

ENGINEERING FABRIC TO BE FOLDED

ACROSS BOTTOM OF TRENCH

TRENCH AND COMPACTED BACKFILL

12" MIN DEPTH AND 4" MIN WIDTH

FORESLOPE

GROUND LINE

ENGINEERING

FABRIC

FLOW

'-0

" M

POST TOP VIEW

DETAILS OF DITCH CHECK

DETAILS OF SILT FENCE

TYPICAL SECTION

SILT FENCE

TYPICAL SECTION

DITCH CHECK

TRASH RACK (BAR GUARD)

12" DIAMETER INTAKE

STRAW WATTLE AROUND

PERIMETER

GRADE SHOWN ON

CROSS SECTIONS

PROPOSED GRADE

SECURE WITH 4

RUST RESISTANT

SCREWSNON-PERFORATED

SECTION

CONCRETE JOINT

SEAL

INTAKE TEE - SIZE

TO MATCH

DIAMETER OF

OUTLET PIPE

CHANNEL ELEVATION AT

TERRACE LOW POINT

TERRACE FLOWLINE ELEVATION

. O R

T O

P O

R R

INSTALL (3) 6.0' LONG

POSTS AROUND RISERS.

SECURE RISER TO POSTS

WITH NO. 9 WIRE

24"

F4 HICKENBOTTOM RISER

INSTALL CLASS 'E' RIP RAP 2' THICK

OVER NON-WOVEN GEOTEXTILE FABRIC

D2 FLARED END SECTION FOOTING W/ RIP-RAP

FLARED END SECTION FOOTING

2' (M

1'-6"

4' -0

42" RCP FLARED END SECTION WITH TRASH TRACK

#3 CLOSED HOOPS @ 12" OC

(6) #5 HORIZ BARS

2" CLEAN STONE 6" THICK

CAST-IN-PLACE

OR PRECAST

CONCRETE FOOTING

CLEAR (TYP)

CLASS 'E' RIP RAP

WITH GROUT

O R

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Pr in te d: C502

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\U se rs

\m ot te n\

Do cs \S hi ve

-H at te ry

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-\2

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C W et la nd \P ro je ct F ile s\

Sh ive

-H at te ry

\1 _C ivi l\C

- C O

O N

dw g

A B C D E F

W es to w n Pk w y, S ui te

W es t D es

M oi ne s, Io w a

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Io w a

Il lin oi s

In di an a

N eb ra sk a

W is co ns in

IOWA D

A R

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A G R I C U L T URE

L A

TEWARDSHIP

SECTIONAL ELEVATION A-A

RISER DETAIL

NOTES:

1) PROVIDE STRUCTURE SHOP DRAWINGS FOR ENGINEERS REVIEW AND

APPROVAL BEFORE FABRICATION OF WATER CONTROL STRUCTURE.

2) WATER CONTROL STRUCTURE TO BE PRE FABRICATED REINFORCED

CONCRETE RISER STRUCTURE WITH WATERTIGHT SEALS AT SECTION

JOINTS AND PIPE PENETRATIONS.

3) STOP LOG CHANNEL IS TO BE ANCHORED TO THE WALLS AND FLOOR

PRIOR TO PLACING CONCRETE INVERT.

4) POUR CONCRETE INVERT AFTER STOP LOG CHANNEL IS INSTALLED.

CAST BOTTOM STOP LOG INTO PLACE WITH THREE 12" DIA "J BOLTS".

A2 MODIFIED SW-403 WATER CONTROL STRUCTURE AND APPURTENANCES

PLAN VIEW

Flow

Flow42

STOP LOG STORAGE STRUCTURE

2.00''

NOTE:

ALL PVC STOP-LOGS SHALL BE PROVIDED BY CONTRACTOR.

CONTRACTOR IS RESPONSIBLE FOR CUTTING STOP-LOGS AS

SHOWN. THE 0.75'' DIMENSION IS CRITICAL AND NEEDS TO BE

CENTERED IN THE STOP-LOG TO AVOID LEAKAGE. THE FINISHED

SURFACE SHALL BE SMOOTH TO PROVIDE A FLAT SURFACE FOR

THE STOP-LOG ABOVE IT. THE CONTRACTOR SHALL DELIVER 17

STOP-LOGS TO THE SITE. THE COST OF THE STOP-LOG WORK IS

INCIDENTAL TO THE OUTLET CONTROL STRUCTURE.

12''

2.25''

NOTE:

TWO (2) LIFTING HOOKS REQUIRED

6''3''1''3''

NOTES:

1. CONTRACTOR TO DRILL 38" HOLES IN TOP OF STOP LOG CHANNELS AND

PROVIDE TWO (2) PADDLE LOCKS TO LOCK THROUGH CHANNELS TO

PREVENT LOGS FROM BEING LIFTED OUT WHEN LOCK IS IN PLACE.

2. CONTRACTOR SHALL SUBMIT SHOP DRAWINGS FROM FABRICATOR FOR

ENGINEER REVIEW.

STOP LOG CROSS SECTION

A4 STOP LOG AND LIFTING HOOK

VARIES

C O

0' (M

D4 TILE TRENCH

PIPE SIZE (IN) MINIMUM TRENCH

WIDTH (IN)

4" 16" 6" 18" 8" 20"

10" 22"

Flow

TOP ELEV = 737.25

BOT. ELEV = 736.25

"3"

2'' DIAMETER ROD

1 1/4'' DIAMETER INSIDE

BEND. HOOK TO BE IN

LINE WITH HANDLE.

EXISTING GRADE. STRIP,

STOCKPILE AND RESPREAD 12

INCHES OF TOPSOIL ALONG TILE

TRENCH OUTSIDE OF PROPOSED

EASEMENT.

HAND-PLACED

MATERIAL, NO ROCKS.

TAMP IN LIFTS

DUAL WALL HDPE PIPE

SLOPE CONTINUOUSLY

TOWARD OUTLET

BACKFILL WITH

EXCAVATED

MATERIAL AND

COMPACT IN LIFTS

BOTTOM OF TILE TRENCH,

PER NRCS IA-46

MOUND TOPSOIL MINIMUM 6 INCHES ABOVE EXISTING GROUND

TO ACCOUNT FOR FUTURE TILE TRENCH SETTLEMENT

TRASH RACK WITH LOCKABLE FLAT

HINGE LID AND ANIT-VORTEX DEVICE

BY AFINTAS ADVANCED TECHNOLOGIES

OR APPROVED EQUIVALENT (BCTM6X6)

9.0'

0.75''

72" X 72" BOX R.C. STRUCTURE

RIM = 746.00

CHANNEL IRON FOR

CHECK BOARDS -

SEE DETAIL

CAST IN PLACE

BOTTOM STOP

LOG MINIMUM 3''

IE = 738.00

72'' X 72" R.C.

BOX STRUCTURE

DETAIL A4

18'' DIAMETER HDPE

DRAWDOWN PIPE

CONCRETE BASE

42'' DIAMETER RCPP

OUTLET PIPE

2'' PVC STOPLOGS

LOCKING BAR

2"X2" X1

4" ANGLE 36" LONG. INSTALL

2" BOLT W/ WELDED NUT FOR HINGE

AT ONE END. DRILL 12" HOLE FOR

PADLOCK AT OTHER END.

6"X1

2" EYEBOLT CAST

INTO SLAB FOR HINGE

6.5 LF 24" DIA DUAL WALL

HDPE BURIED FOR STOP

LOG STORAGE STRUCTURE

COMPACTED SUB-BASE,

8" THICK

INSTALL STOP LOGS

TO NWL (746.00)

24" DIA. COVER. AGRIDRAIN GR24P

GRATE AND COLLAR OR APPROVED

EQUAL.

WATER CONTROL STRUCTURE

L 3 X 3 X 3 8

GALVANIZED (TYP)

PVC STOP LOG 1'' LESS THAN TIGHT FIT.

FIELD VERIFY LENGTH.

LIFTING HOLES

ANCHORED AND SEALED

WITH WATER-STOP

NWL = 746.00

ANCHORED AND SEALED

WITH WATER-STOP

BOX STRUCTURE TO BE

IOWA DOT SW-403 OR

APPROVED EQUIVALENT

E2 CONCRETE ANTI-SEEPAGE COLLAR

52.5" O.D.

(42" RCPP)

6'-0"

6' -0

3" CLEAR

(TYP)

SECTION A

42" RCPP6'

-0

HAND COMPACT BACKFILL AROUND

COLLAR AND PIPE WITH IMPERVIOUS

BACKFILL AND GRANULAR BENTONITE

MIXTURE (10% BENTONITE BY DRY WEIGHT)

(MINIMUM 300 POUNDS OF BENTONITE

PER CUBIC YARD OF BACKFILL)

INSTALL HYDROTITE RS-0723-3.51

WATERSTOP WITH

GREENSTREAK'S HYDROTITE

ADHESIVE OR APPROVED EQUALS

#4 @ 12" O-C

EW CENTERED

PLACE COLLAR A MINIMUM

OF 2.0' FROM PIPE JOINTS

#4 @ 12" O-C EW

O R

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Pr in te d: C503

S G

M M

C O

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\U se rs

\m ot te n\

Do cs \S hi ve

-H at te ry

, I nc

-\2

- B oe nd er M

C W et la nd \P ro je ct F ile s\

Sh ive

-H at te ry

\1 _C ivi l\C

- C O

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dw g

A B C D E F

W es to w n Pk w y, S ui te

W es t D es

M oi ne s, Io w a

w w w

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Io w a

Il lin oi s

In di an a

N eb ra sk a

W is co ns in

IOWA D

A R

E NT O F

A G R I C U L T URE

L A

TEWARDSHIP

X X X X X X X

9" 9"

6' (MIN.) 6' (MIN.)

12"

A4 FIVE-STRAND BARBED WIRE FIELD FENCE

X X X X X X X X X X

2 12" NOMINAL STEEL PIPE, CAPPED

2" NOMINAL STEEL PIPE

2 12" NOMINAL STEEL PIPE

2 12" NOMINAL STEEL PIPE, CAPPED

CONCRETE MOUND TO PREVENT

WATER STANDING AROUND POST

CONCRETE

16'

MINIMUM TWO HINGE ASSEMBLIES PLATE FOR SECURING GATE WITH CHAIN

1.5" ID, 20 GAUGE STEEL TUBING.

GREEN POWDER COAT FINISH.

MINIMUM ONE VERTICAL BRACE.MINIMUM 5 HORIZONTAL TUBES

NOTES:

1. GATE END BRACING SHALL SINGLE H BRACE BE IN ACCORDANCE WITH NRCS PRACTICE

SPECIFICATION IA-382-PS AND SHALL BE INSTALLED AT EACH SIDE OF THE GATE.

D4 STANDARD FENCE CATTLE GATE

DOWNSTREAMUPSTREAM

C3 TYPICAL EMBANKMENT CROSS SECTION

WAVE BENCH

- SEE DETAILNWL = 746.00 4

14.00'

10.00'

' S

N G

1 EXISTING GROUND

COVER WITH

12" TOPSOIL

COMPACTED

CLAY CORE

8.00'

1.5

CORE TRENCH

BACKFILL WITH COMPACTED IMPERVIOUS FILL

NOTE:

ALL DRAIN TILE IDENTIFIED DURING CORE TRENCH

EXCAVATION TO BE RECORDED. REMOVE DRAIN

TILES IN THEIR ENTIRETY EXTENDING 10' BEYOND

EMBANKMENT FOOTPRINT

NOTE:

PROJECT ENGINEER TO VERIFY THAT CORE

TRENCH EXCAVATION TERMINATES IN SUITABLE

SOILS PRIOR TO BACKFILLING.

TOP OF DAM

ELEV = 753.50TOP OF DAM CORE

D2 NYLOPLAST DRAWDOWN RISER

H D

24 INCH RISER

.00

TOP VIEW

#4 BARS @ 12''

OC BOTH WAYS.

2" CLEAR

6' X 6' REINFORCED

CONCRETE BASE.

NWL = 746.00

PROPOSED

GRADE

24" DUCTILE IRON DOMED GRATE

BY "NYLOPLAST" (2499CGD)

OR APPROVED EQUAL

NYLOPLAST

CONNECTOR

SEAM

NYLOPLAST

CONNECTOR

CONTRACTOR TO CUT SLOTTED PERFORATIONS:

2"X6" SLOTS SPACED 8" HORIZONTAL AND 6" VERTICAL.

OFFSET 4" AND 8" FROM TOP OF STRUCTURE

EROSION STONE

RIM = 745.50

CAST RISER INTO CONCRETE BASE

RISER SHALL BE NYLOPLAST 24" DRAIN BASIN (2824AG)

5 74

4:1

5:1

4:1

5:1

X X

STRUCTURE SEEDING

AREA = 0.8 ACRES

INSTALL 240 LF

OF SILT FENCE

INSTALL 250 LF

OF SILT FENCE

INSTALL 500 LF

OF SILT FENCE

INSTALL 500 LF

OF SILT FENCE

STRUCTURE SEEDING

AREA = 1.7 ACRES

PASTURE SEEDING

AREA = 4.1 ACRES

EXISTING CONTOUR - MAJOR

EXISTING CONTOUR - MINOR

EXISTING STREAM

PROPOSED LINE TYPEDESCRIPTION

TOP OF DAM ELEVATION

NORMAL WATER ELEVATION

MAJOR CONTOUR

MINOR CONTOUR

LEGEND

D R

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Pr in te d: C601

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M M

C O

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\U se rs

\m ot te n\

Do cs \S hi ve

-H at te ry

, I nc

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- B oe nd er M

C W et la nd \P ro je ct F ile s\

Sh ive

-H at te ry

\1 _C ivi l\C

- S

dw g 6/

NORTH

EASEMENT BOUNDARY

A B C D E F

W es to w n Pk w y, S ui te

W es t D es

M oi ne s, Io w a

w w w

.s hi ve -h at te ry .c om

Io w a

Il lin oi s

In di an a

N eb ra sk a

W is co ns in

IOWA D

A R

E NT O F

A G R I C U L T URE

L A

TEWARDSHIP

PASTURE SEEDING

STRUCTURE SEEDING

SILT FENCE

	2025-06-19T16:11:48+0000
SignNow

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File details come from the government source that posted it. Updated Oct 1, 2025.