6_26-09_HAR892022C_Planset_6-5-26.pdf

PDF 15 MB Posted Aug 6, 2026

Attached to: Har892022C 26-09 (Hardin)
Solicitation number: 009-RFB-WRBWL-CY26-09
Issued by: Hancock County, Iowa

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Written by GovTribe AI · Sep 7, 2026

This is a construction document set consisting of engineering plans and specifications prepared by Shive-Hattery, Inc. for the Iowa Department of Agriculture and Land Stewardship (IDALS) Division of Soil Conservation and Water Quality for a nutrient reduction wetland construction project in Hardin County, Iowa. The project, designated HAR892022C, involves the construction of a 2.5-acre wetland with associated infrastructure on property owned by the Shoofly Trust (Bill Jensen) and David and Mary Jensen near Iowa Falls. The scope of work includes site stripping and preparation, existing drain tile investigation and removal (2,800 linear feet), general excavation (904 cubic yards), earthfill placement (7,618 cubic yards across multiple fill types), topsoil placement (5,591 cubic yards), a 4-foot by 4-foot precast concrete water control structure with stoplog system, 36-inch reinforced concrete pipe principal spillway (79 linear feet), dual-wall high-density polyethylene drain tile in various sizes (6-inch through 12-inch diameters totaling 3,244 linear feet), corrugated metal pipe tile outlets (8 through 15 inches), structure and buffer seeding (7.3 acres total), and riprap placement (245 tons). The project includes detailed construction details for embankments, spillways, tile connections, water control structures, and erosion protection. The estimated construction cost range is $200,000 to $300,000, with construction to commence within 7 days of the preconstruction meeting and be completed by June 15, 2027, with buffer seeding completed by June 30, 2027 and structure seeding by September 15, 2027.

Bidders must submit a bid bond equal to 10 percent of the bid amount and a Performance and Payment Bond equal to 100 percent of the contract price upon award. Sealed bids are due August 26, 2026 at 3:00 p.m. Central Daylight Time, with a mandatory pre-bid conference scheduled for August 13, 2026 at 9:00 a.m. at the Hardin County ISU Extension Office in Iowa Falls. All bidders must be registered with the Iowa Department of Inspections, Appeals and Licensing prior to contract execution, and non-Iowa corporations must provide proof of authorization from the Iowa Secretary of State to conduct business in Iowa. Written questions regarding plans and specifications must be submitted to Dan Jensen, P.E. at Shive-Hattery (djensen@shive-hattery.com) with copies to Tracy Blocker (tracy.blocker@iowaagriculture.gov) by 3:00 p.m. on August 20, 2026 for inclusion in a final addendum. Prospective bidders must register on the plan holders list by contacting Tracy Blocker to receive meeting minutes, addenda, and updated plan holders lists. The contractor is responsible for all construction dewatering at no additional cost to the Division, and the contractor shall preserve survey stakes to the extent feasible, with any re-staking costs being the contractor's responsibility. A 20 percent shrinkage factor was incorporated into earthwork calculations, and the embankment shall be overbuilt by 5 percent to account for settlement.

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Other files

File	Type	Posted
2_26-09_Har892022C_Notice to Bidders.pdf	PDF	Aug 6, 2026
1426383-event.pdf	PDF	Aug 6, 2026
1_26-09_Har892022C_General Requirements.pdf	PDF	Aug 6, 2026
5_26-09_Har892022C_Doc EE Bid Bond (UPLOAD).pdf	PDF	Aug 6, 2026
7_26-09_HAR892022C_Specifications_8-4-26.pdf	PDF	Aug 6, 2026
3_26-09_Har892022C_Doc CC_Proposal-Acknowledgment-Affidavit (UPLOAD).pdf	PDF	Aug 6, 2026
4_26-09_Har892022C_Schedule of Prices Worksheet.pdf	PDF	Aug 6, 2026
8_26-09_HAR892022C_Appendix I - Construction & Addmin Forms.pdf	PDF	Aug 6, 2026
9_26-09_HAR892022C_ H&H Report.pdf	PDF	Aug 6, 2026

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STATE OF IOWA

HARDIN COUNTY, IA

ENGINEER

SHIVE-HATTERY, INC

ATTN: DAN JENSEN

4125 WESTOWN PARKWAY, SUITE 100

WEST DES MOINES, IOWA 50266

PH: (515) 223-8104

FX: (515) 223-0622

SITE ADDRESS:

14274 Oo AVE

IOWA FALLS, IA, 50126

CONTACT INFORMATION:

IOWA DEPARTMENT OF AGRICULTURE AND LAND STEWARDSHIP

SARA SMITH, PE

502 E. 9TH STREET

DES MOINES, IA, 50319

PH: (515) 422-7335

HAR892022C - SHOOFLY JENSEN NR

WETLAND

IDALS

PROJECT

LOCATION

PROJECT DRAWING COORDINATE SYSTEM:

HORIZONTAL: NAD83 IOWA STATE PLANE NORTH 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

DANIEL JENSEN

25063

CIVIL ENGINEER

NRCS NEM PART 105 CERTIFICATION

THE SIGNING PROFESSIONALS HEREBY CERTIFY THAT, TO

THE BEST OF THEIR PROFESSIONAL KNOWLEDGE,

JUDGEMENT, AND BELIEF, THESE PLANS MEET APPLICABLE

NRCS STANDARDS.

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

AGR

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

S H

PROJECT LOCATION

GUTHRIE COUNTY

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LANDOWNER CONTACT:

BILL JENSEN

PH: (641) 373-3534

ALDEN

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IOWA FALLS

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IOWA DEPARTMENT OF AGRICULTURE AND

LAND STEWARDSHIP

ONE-CALL TICKET NUMBER: _____________________________

CLIENT ACCEPTANCE

PRINTED NAME: _____________________________

SIGNATURE: _____________________________

THE ENGINEERING JOB CLASS IS IV

NUTRIENT REDUCTION WETLAND

CONSTRUCTION

ENTRANCE

CONSTRUCTION

ACCESS ROUTE

Sheet List Table Sheet Number Sheet Title

C001 COVER SHEET

C002 QUANTITIES & NOTES

CD01 EXISTING SITE CONDITIONS

CD02 EXISTING TILE REMOVAL

C201 OVERALL GRADING PLAN

C202 GRADING PLAN

C203 CUT-FILL PLAN

C301 EMBANKMENT PLAN & PROFILE

C302 PRINCIPAL SPILLWAY PLAN & PROFILE

C303 PROPOSED TILE PLAN AND PROFILE

C304 PROPOSED TILE PLAN AND PROFILE

C305 PROPOSED TILE PLAN AND PROFILE

C306 PROPOSED TILE PLAN AND PROFILE

C501 CONSTRUCTION DETAILS

C502 CONSTRUCTION DETAILS

C503 CONSTRUCTION DETAILS

C601 SEEDING PLAN

6/5/2026

MULTICORELINK:C001 QUANTITIES & NOTES-C002 QUANTITIES & NOTES

MULTICORELINK:C101 EXISTING SITE CONDITIONS-C101 EXISTING SITE CONDITIONS

MULTICORELINK:C101 EXISTING SITE CONDITIONS-CD02 EXISTING TILE REMOVAL

MULTICORELINK:C201 WETLAND GRADING PLAN-C201 OVERALL GRADING PLAN

MULTICORELINK:C201 WETLAND GRADING PLAN-C202 GRADING PLAN

MULTICORELINK:C201 WETLAND GRADING PLAN-C203 CUT-FILL PLAN

MULTICORELINK:C301 EMBANKMENT PLAN & PROFILE-C301 EMBANKMENT PLAN & PROFILE

MULTICORELINK:C302 PROPOSED TILE PLAN AND PROFILE-C303 PROPOSED TILE PLAN AND PROFILE MULTICORELINK:C302 PROPOSED TILE PLAN AND PROFILE-C303 PROPOSED TILE PLAN AND PROFILE MULTICORELINK:C302 PROPOSED TILE PLAN AND PROFILE-C304 PROPOSED TILE PLAN AND PROFILE MULTICORELINK:C302 PROPOSED TILE PLAN AND PROFILE-C304 PROPOSED TILE PLAN AND PROFILE MULTICORELINK:C302 PROPOSED TILE PLAN AND PROFILE-C305 PROPOSED TILE PLAN AND PROFILE MULTICORELINK:C302 PROPOSED TILE PLAN AND PROFILE-C305 PROPOSED TILE PLAN AND PROFILE MULTICORELINK:C302 PROPOSED TILE PLAN AND PROFILE-C306 PROPOSED TILE PLAN AND PROFILE MULTICORELINK:C302 PROPOSED TILE PLAN AND PROFILE-C306 PROPOSED TILE PLAN AND PROFILE

MULTICORELINK:C501 CONSTRUCTION DETAILS-C501 CONSTRUCTION DETAILS

MULTICORELINK:C501 CONSTRUCTION DETAILS-C502 CONSTRUCTION DETAILS

MULTICORELINK:C501 CONSTRUCTION DETAILS-C503 CONSTRUCTION DETAILS

MULTICORELINK:C601 SEEDING PLAN-C601 SEEDING PLAN

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ESTIMATED PROJECT QUANTITIES: ESTIMATE REFERENCE INFORMATION:

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 OR IDALS GUARANTEE THE PRACTICE TO HOLD A PERMANENT POOL OF WATER

WETLAND DATA:

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ITEM NO. ITEM DESCRIPTION UNIT BID QUANTITY SPEC # AS-BUILT

QUANTITY

1 SITE STRIPPING & PREPARATION 1 LS IA CS-001

2 CROP DAMAGE 0 AC IA CS-001

3 STRUCTURE & CHANNEL SEEDING 1.5 AC IA CS-006

4 BUFFER SEEDING 5.8 AC IA CS-006

5 MOBILIZATION AND DEMOBILIZATION 1 LS CS-008

6 DRAIN TILE INVESTIGATION AND REMOVAL 2,800 LF IA CS-009

7 EXCAVATION (GENERAL) 904 CY IA CS-021

8 EARTHFILL (GENERAL) 3,680 CY IA CS-023

9 EARTHFILL (GENERAL DAM) 1,358 CY IA CS-023

10 EARTHFILL (DAM CORE) 2,572 CY IA CS-023

11 EARTHFILL (SCARIFY AND RECOMPACT 9" LAYER OF WETLAND BOTTOM (P)) 3,008 CY IA CS-023

12 TOPSOIL PLACEMENT 5,591 CY IA CS-026

13 4' X 4' WATER CONTROL STRUCTURE 1 EA IA CS-031

14 36" RCP DRAWDOWN WETLAND OUTLET PIPE 79 LF IA CS-031

15 6" CORRUGATED PROFILE WALL (DUAL WALL) POLYETHYLENE PIPE 1,455 LF IA CS-046

16 8" CORRUGATED PROFILE WALL (DUAL WALL) POLYETHYLENE PIPE 1,329 LF IA CS-046

17 10" CORRUGATED PROFILE WALL (DUAL WALL) POLYETHYLENE PIPE 51 LF IA CS-046

18 12" CORRUGATED PROFILE WALL (DUAL WALL) POLYETHYLENE PIPE 409 LF IA CS-046

19 STOP LOG STORAGE STRUCTURE 1 EA IA CS-046

20 8" CMP TILE OUTLETS (20 LF EACH) 3 EA IA CS-051

21 10" CMP TILE OUTLETS (20 LF EACH) 2 EA IA CS-051

22 12" CMP TILE OUTLETS (20 LF EACH) 1 EA IA CS-051

23 15" CMP TILE OUTLETS (20 LF EACH) 1 EA IA CS-051

24 RIP RAP 245 TON IA CS-061

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 9,724 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 SEEDINGE: THIS ITEM INCLUDES SEEDING FOR ALL EMBANKENT AND TILE COVER BERM AREAS AND INCLUDES SEEDBED PREP, SEEDING, MULCHING, AND

FERILIZER.

4 IA CS-006 BUFFER SEEDING: THIS ITEM INCLUDES SEEDING FOR ALL AREAS ABOVE NORMAL POOL AND WITHIN EASEMENT BOUNDARY, EXLUDING THOSE AREAS WHERE STUCTURE SEEDING IS

SPECIFIED. SEE SEEDING PLAN. NO MULCH OR FERTLIZER SHALL BE APPLIED.

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.

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 THE DAM EMBANKMENT AS WELL AS ESTABLISHING POOL FINAL GRADE.

8 IA CS-023

EARTHFILL (GENERAL): THIS ITEM INCLUDES THE AMOUNT OF MATERIAL REQUIRED TO CONSTRUCT THE SUBMERGED BERMS AND ADDITIONAL FILL TO BE PLACED OVER TILE COVER BERMS ALONG WITH TOPSOIL FILL IN AREAS OUTSIDE OF EASEMENT. 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.

9 IA CS-023

EARTHFILL (GENERAL DAM): THIS ITEM INCLUDES THE EARTHFILL PLACEMENT AND COMPACTION NECESSARY TO CONSTRUCTION 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.

MEASUREMENT AND PAYMENT FOR PLACEMENT AND COMPACTION OF ALL FILL MATERIAL IS INCLUDED IN THIS ITEM AND WILL BE PAID BASED ON PLAN QUANTITY.

10 IA CS-023

EARTHFILL (DAM CORE): THIS ITEM INCLUDES THE EARTHFILL PLACEMENT AND COMPACTION NECESSARY TO CONSTRUCT THE EMABNKMENT CORE WITHIN THE EMBANKMENT, INCLUDING THE CORE TRENCH. 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. MEASUREMENT AND PAYMENT FOR PLACEMENT AND COMPACTION OF ALL FILL MATERIAL IS INCLUDED IN THIS ITEM AND WILL BE PAID BASED ON PLAN QUANTITY.

11 IA CS-023

EARTHFILL (SCARIFY AND RECOMPACT 9" LAYER OF WETLAND BOTTOM (P)): THIS ITEM INCLUDES SCARIFICATION AND LOOSENING OF A 9 INCH SURFACE LAYER OF SOIL ON THE WETLAND POOL BOTTOM WITHIN THE POOL FOOTPRINT, 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-026

TOPSOIL PLACEMENT: THIS ITEM INCLUDES THE STRIPPING, SALVAGE, AND RE-SPREAD OF 6" OF EXISTING TOPSOIL FROM ALL AREAS WITHIN THE GRADING LIMITS. ALL DISTURBED AREAS SHALL RECEIVED 6" OF TOPSOIL RESPREAD. IN THE BORROW AREA, AN ADDITIONAL 6" (12" TOTAL) WILL BE STRIPPED TO GENERATE TOPOSIL FOR FILL PLACEMENT OUTSIDE OF

THE EASEMENT.

13 IA CS-031 4' X 4' WATER CONTROL STRUCTURE : THIS ITEM INCLUDES ALL LABOR, EQUIPMENT, AND MATERIALS FOR THE PLACEMENT OF THE 48" CONCRETE RISER STRUCTURE, FOOTING, STEEL, STOPLOGS, FABRICATION, PIPE CONNECTIONS, AND TRASH RACK.

14 IA CS-031 36" RCP DRAWDOWN WETLAND OUTLET PIPE: THIS ITEM INCLUDES ALL LABOR, EQUIPMENT, AND MATERIALS REQUIRED FOR THE EXCAVATION, PLACEMENT OF THE REINFORCED

CONCRETE PIPE, SUPPORT BLOCKS, OUTLET CRADLE , ANTI-SEEP COLLARS, AND BACKFILL.

15 IA CS-046 6" CORRUGATED PROFILE WALL (DUAL WALL) POLYETHYLENE PIPE: THIS ITEM INCLUDES THE MATERIAL, EXCAVATION, PLACEMENT, JOINTING, AND BACKFILL OF THE 6" DUAL-WALL NON-PERFORATED HDPE DRAIN TILE. SEE SHEET C202 FOR LENGTHS, LOCATIONS AND ELEVATIONS.

16 IA CS-046 8" CORRUGATED PROFILE WALL (DUAL WALL) POLYETHYLENE PIPE: THIS ITEM INCLUDES THE MATERIAL, EXCAVATION, PLACEMENT, JOINTING, AND BACKFILL OF THE 8" DUAL-WALL NON-PERFORATED HDPE DRAIN TILE. SEE SHEET C202 FOR LENGTHS, LOCATIONS AND ELEVATIONS.

17 IA CS-046 10" CORRUGATED PROFILE WALL (DUAL WALL) POLYETHYLENE PIPE: THIS ITEM INCLUDES THE MATERIAL, EXCAVATION, PLACEMENT, JOINTING, AND BACKFILL OF THE 10" DUAL-WALL NON-PERFORATED HDPE DRAIN TILE. SEE SHEET C202 FOR LENGTHS, LOCATIONS AND ELEVATIONS.

18 IA CS-046 12" CORRUGATED PROFILE WALL (DUAL WALL) POLYETHYLENE PIPE: THIS ITEM INCLUDES THE MATERIAL, EXCAVATION, PLACEMENT, JOINTING, AND BACKFILL OF THE 12" DUAL-WALL NON-PERFORATED HDPE DRAIN TILE. SEE SHEET C202 FOR LENGTHS, LOCATIONS AND ELEVATIONS.

19 IA CS-046 STOP LOG STORAGE STRUCTURE: THIS ITEM INCLUDES ALL LABOR, EQUIPMENT, AND MATERIALS FOR THE PLACEMENT OF STOPLOGS, STOP LOG REMOVAL TOOLS, AND STOP LOG

STORAGE STUCTURE.

20 IA CS-051 8" CMP 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" CMP END SECTION FOR THE PROPOSED FIELD TILE OUTLET TO THE WETLAND. 8" CMP OUTLET SECTIONS ARE FOR 6 INCH TILES.

21 IA CS-051 10" CMP 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" CMP END SECTION FOR THE PROPOSED FIELD TILE OUTLET TO THE WETLAND. 10" CMP OUTLET SECTIONS ARE FOR 8 INCH TILES.

22 IA CS-051 12" CMP 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" CMP END SECTION FOR THE PROPOSED FIELD TILE OUTLET TO THE WETLAND. 12" CMP OUTLET SECTIONS ARE FOR 10 INCH TILES.

23 IA CS-051 15" CMP TILE OUTLETS (20 LF EACH): THIS ITEM INCLUDES THE COSTS FOR MATERIAL, EXCAVATION, PLACEMENT, JOINTING, BEDDING, RODENT GUARDS, AND BACKFILLING OF THE 20 LF 15" CMP END SECTION FOR THE PROPOSED FIELD TILE OUTLET TO THE WETLAND. 15" CMP OUTLET SECTIONS ARE FOR 12 INCH TILES.

24 IA CS-061

RIP RAP, CLASS 'E' WITH GEOTEXTILE FABRIC': THIS ITEM INCLUDES THE EXCAVATION AND PLACEMENT OF CLASS 'E' REVETMENT OVER GEOTEXTILE FABRIC AT THE LOCATIONS SHOWN ON THE PLANS. 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.

CULTURAL RESOURCES NOTE:

1. IF A CULTURAL RESOURCE IS IDENTIFIED DURING

CONSTRUCTION, STOP IMMEDIATELY AND NOTIFY

LOCAL NATURAL RESOURCES CONSERVATION

SERVICE OFFICE.

PROJECT ID HAR892022C ----- LENGTH OF BERM 575 FEET

LANDOWNER(S) DAVID & MARY JENSEN,

SHOOFLY TRUST ----- AUXILIARY SPILLWAY

ELEVATION 1111.0 FEET

PRELIMINARY OR FINAL

DESIGN FINAL DESIGN ----- AUXILIARY SPILLWAY

WIDTH 150 FEET

DRAINAGE AREA 185.0 ACRES WEIR WIDTH 48" BOX RISER W/ 36" RCP FEET

WETLAND POOL AREA 2.5 ACRES TIME OF CONCENTRATION 0.8 HOURS

DEEP WATER AREA (>3 FT

DEEP) 0.16 ACRES WEIGHTED RUNOFF

CURVE NUMBER 62 -----

NORMAL POOL

ELEVATION 1108.0 FEET 25-YEAR STORM DESIGN

FLOW 144 CFS

AVERAGE POOL DEPTH 1.4 FEET 100-YEAR STORM DESIGN

FLOW 270 CFS

MAXIMUM POOL DEPTH 5.0 FEET 100-YEAR FLOOD SURF.

ELEVATION 1111.14 FEET

POOL STORAGE 3.5 ACRE-FEET ESTIMATED SEDIMENT

STORAGE 145 YEARS

BERM ELEVATION 1113.0 FEET TOTAL EASEMENT AREA 12.29 ACRES

BERM STORAGE 34.9 ACRE-FEET

O o

135TH STREET

O o

SHOOFLY TRUST

(JENSEN, BILL)

JENSEN,

MARY & DAVID

GRADING LIMITS (TYP.)

EASEMENT BOUNDARY (TYP.)

APPROXIMATE PROPERTY

BOUNDARY (TYP.)

CLEAR VEGETATION AND STRIP TOPSOIL .

RESPREAD TOPSOIL AFTER GRADING IS

COMPLETE. SEE TOPSOIL STRIPPING NOTE.

CONSTRUCTION ENTRANCE

PLACE 20 TONS OF 3" ROADSTONE

AT EXISTING FIELD ENTRANCE

REMOVE EXISTING CONCRETE

DEBRIS, RUBBISH, AND TWO

TREES WITHIN GRADING LIMITS

A B C D E F

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SURVEY NOTES:

1. LIMITED TOPOGRAPHIC SURVEY COMPLETED BY SHIVE-HATTERY ENGINEERING ON DECEMBER

6TH, 2022.

2. SUPPLEMENTAL EXISTING SURFACE INFORMATION SHOWN WAS BASED ON LIGHT DETECTION

AND RANGING (LIDAR) INFORMATION FROM IOWA DNR.

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

NORTH

LEGEND

LINE TYPEDESCRIPTION

GRADING LIMITS

EXISTING FENCE

APPROX. PROPERTY BOUNDARY

MAJOR CONTOUR (EXISTING)

MINOR CONTOUR (EXISTING)

EASEMENT BOUNDARY

GENERAL NOTES:

1. PROPERTY BOUNDARIES ARE APPROXIMATE AND BASED ON BEACON PROPERTY MAP,

VERIFY PROPERTY BOUNDARIES

REMOVAL NOTES:

1. STRIP, STOCKPILE, AND RESPREAD 12" OF TOPSOIL IN THE EMBANKMENT FOOTPRINT (0.5

ACRES) AND 6" WITHIN ALL OTHER DISTURBED AREAS WITHIN THE EASEMENT BOUNDARY (3.0

ACRES). RESPREAD 12" OF TOPSOIL WITHIN EMBANKMENT FOOTPRINT AND 6" IN ALL OTHER

DISTURBED AREAS.

REMOVE EXISTING

TREES AND DEBRIS

WITHIN GRADING LIMITS

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SHOOFLY TRUST

(JENSEN, BILL)

JENSEN,

MARY & DAVID

SHOOFLY TRUST

(JENSEN, BILL)

LOCATE AND REMOVE 984'

OF EXISTING 10" CLAY TILE

LOCATE AND REMOVE 728'

OF EXISTING 4" CLAY TILE

LOCATE AND REMOVE 25'

OF EXISTING 4" CLAY TILE

LOCATE AND REMOVE 25'

OF EXISTING 4" CLAY TILE

LOCATE AND REMOVE 25'

OF EXISTING 5" CLAY TILE

LOCATE AND REMOVE 565'

OF EXISTING 4" CLAY TILE

LOCATE AND REMOVE 25'

OF EXISTING 4" CLAY TILE

LOCATE AND REMOVE 150'

OF EXISTING 8" CLAY TILE

GRADING LIMITS (TYP.)

EASEMENT BOUNDARY (TYP.)

APPROXIMATE PROPERTY

BOUNDARY (TYP.)

LEGEND

LINE TYPEDESCRIPTION

GRADING LIMITS

EXISTING FENCE

APPROX. PROPERTY BOUNDARY

MAJOR CONTOUR (EXISTING)

MINOR CONTOUR (EXISTING)

EXISTING DRAIN TILE, 4"

EASEMENT BOUNDARY

A B C D E F

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TILE INFORMATION

EXISTING TILE INFORMATION IS APPROXIMATE AND WAS PROVIDED BY

THE LANDOWNER.

NORTH

EXISTING DRAIN TILE, 5"

EXISTING DRAIN TILE, 8"

EXISTING DRAIN TILE, 10"

TILE ABANDON

TILE REMOVAL

REMOVAL NOTES:

1. CONTRACTOR SHALL IMMEDIATELY REPORT TO THE ENGINEER

ALL PREVIOUSLY UNKNOWN TILE LINES WITHIN THE PROJECT

AREA. DISCOVERED TILE LINES SHALL REMAIN UNCOVERED FOR

FURTHER EVALUATION.

2. ALL DRAIN TILE FOUND DURING EXCAVATION SHALL BE REMOVED,

EXTENDING 10 FEET BEYOND THE EMBANKMENT FOOTPRINT.

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SHOOFLY TRUST

(JENSEN, BILL)

0+00 1+00 2+00

3+00

CONNECT TO

EXISTING 12" RISER

CONSTRUCTION

ACCESS ROUTE

LEGEND

LINE TYPEDESCRIPTION

TOP OF DAM ELEVATION

GRADING LIMITS

MAJOR CONTOUR (PROPOSED)

MINOR CONTOUR (PROPOSED)

TILE REMOVAL

APPROX. PROPERTY BOUNDARY

MAJOR CONTOUR (EXISTING)

MINOR CONTOUR (EXISTING)

NORMAL WATER LEVEL

TILE - ABANDON IN PLACE

A B C D E F

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EASEMENT BOUNDARY

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JENSEN,

MARY & DAVID

0+00

1+00 2+00

3+00

PRINCIPAL SPILLWAY PIPE 79 LF

36" RCP @ 0.90%

ALL FILL PLACED OUTSIDE THE

EASEMENT SHALL BE TOPSOIL.

CONTRACTOR SHALL DISK AREA

PRIOR TOPSOIL PLACEMENT.

8A 8B 8C

3 A

4 A

5D 6A

2.5 ACRE WETLAND

NWL = 1108.00

TOP OF DAM

ELEVATION = 1113.00

TOP WIDTH = 16 FEET

12.2 ACRE EASEMENT

GRADING LIMITS (TYP)

SUBMERGED BERMS

TOP WIDTH = 20'

ELEV = 1107.50

SUBMERGED BERMS

TOP WIDTH = 20'

ELEV = 1107.50

PRINCIPAL SPILLWAY

CENTERLINE ALIGNMENT

EMBANKMENT

CENTERLINE ALIGNMENT

TIE IN 429 LF OF 12" HDPE

TO EXISTING 10" TILE

TIE IN 626 LF OF 6" HDPE TO

EXISTING 4" TILES

TIE IN 453 LF OF 8" HDPE

TO EXISTING 4" & 5" TILE

TIE IN 438 LF OF 6" HDPE

TO EXISTING 4" TILES

TIE IN 392 LF OF 6" HDPE

TO EXISTING 4" TILES

TIE IN 71 LF OF 10" HDPE

TO EXISTING 8" TILE

TIE IN 916 LF OF 6" HDPE

TO EXISTING RISER

100-YR

HWE = 1111.14

BORROW AREA

TIE IN 59 LF OF 6" HDPE

TO EXISTING 4" TILES

EXISTING WATER LEVEL

ELEVATION = 1101.30

15 TONS CLASS E RIP

RAP 2' THICK AT EACH

TILE OUTLET (TYP)

STOPLOG

STRUCTURE

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

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W is co ns in

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LEGEND

LINE TYPEDESCRIPTION

TOP OF DAM ELEVATION

GRADING LIMITS

MAJOR CONTOUR (PROPOSED)

MINOR CONTOUR (PROPOSED)

TILE REMOVAL

APPROX. PROPERTY BOUNDARY

MAJOR CONTOUR (EXISTING)

MINOR CONTOUR (EXISTING)

NORMAL WATER LEVEL

TILE - ABANDON IN PLACE

EASEMENT BOUNDARY

NOTES:

1. STRIP, STOCKPILE, AND RESPREAD 12" OF

TOPSOIL IN THE EMBANKMENT FOOTPRINT (0.50

ACRES) AND 6" WITHIN ALL OTHER DISTURBED

AREAS WITHIN THE EASEMENT BOUNDARY (3.0

ACRES). RESPREAD 12" OF TOPSOIL WITHIN

EMBANKMENT FOOTPRINT AND 6" IN ALL OTHER

DISTURBED AREAS WITHIN THE PROPOSED

EASEMENT.

2. MAXIMUM SIDE SLOPES OF ALL EXCAVATED

AREAS TO BE 3:1 OR FLATTER.

3. COMPACTION SHALL BE NRCS IA-23 METHOD 2.

SEE SPECIFICATIONS.

4. NO TILE INVESTIGATION HAS BEEN PERFORMED ,

VERIFY INVERTS DURING CONSTRUCTION.

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MARY & DAVID

0+00

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3+00

ALL FILL PLACED OUTSIDE THE

EASEMENT SHALL BE TOPSOIL.

CONTRACTOR SHALL DISK AREA

PRIOR TOPSOIL PLACEMENT.

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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NORTH

NOTES:

1. EMBANKMENT FILL SHALL BE COMPACTED IN MAXIMUM 6" LIFTS. COMPACTION SHALL UTILIZE NRCS METHOD 2

(SEE IA-23).

2. ALL DISTURBED AREAS REQUIRE 6" OF TOPSOIL STRIP, SALVAGE, AND RESPREAD. TOP SOIL SHALL NOT BE USED

FOR EMBANKMENT FILL. AN ADDITION 6" OF TOPSOIL SHALL BE STRIPPED FROM THE BORROW AREA FOR ALL

PROPOSED FILL PLACED OUTSIDE THE EASEMENT.

3. THE EMBANKMENT SHALL BE OVERBUILT 5% TO ACCOUNT FOR SETTLEMENT. SEE SHEET C301.

4. EARTHWORK SHALL BE BALANCED ON SITE. A 20% SHINKAGE FACTOR WAS USED IN EARTHWORK CALCULATIONS

FOR ESTIMATION PURPOSES.

5. RESERVE SELECT CLAY SOILS FOR CORE TRENCH AND EMBANKMENT CORE FILL.

6. CONTRACTOR IS RESPONSIBLE FOR COMPLIANCE WITH ALL APPLICABLE PERMITS DURING CONSTRUCTION.

ELEVATIONS TABLE

CUT/FILL MINIMUM ELEVATION (FT.) MAXIMUM ELEVATION (FT.) COLOR

CUT -5.0 -4.0

CUT -4.0 -3.0

CUT -3.0 -2.0

CUT -2.0 -1.0

CUT -1.0 0.0

FILL 0.0 1.0

FILL 1.0 2.0

FILL 2.0 3.0

FILL 3.0 4.0

FILL 4.0 5.0

FILL 5.0 6.0

FILL 6.0 7.0

FILL 7.0 8.0

FILL 8.0 9.0

BORROW AREA

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A M

EARTHWORK TABLE

CLASSIFICATION CY

EXCAVATION (GENERAL) 904

EARTHFILL (GENERAL) 3,680

EARTHFILL (GENERAL DAM) 1,358

EARTHFILL (DAM CORE) 2,572

IOWA D

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3+00

4+00

5+00

3:1 3:1

1+00

2+00

3+00

4+00

4+50

PRINCIPAL SPILLWAY PIPE

36" RCP 78 LF

IE = 1103.0

IE = 1102.3

STOPLOG

STRUCTURE

0+00.00 1+00.00 2+00.00 3+00.00 4+00.00 5+00.00

-2.76%

0.00% 0.09%

0.00% -8.00%

PVI STA: 0+30.33

PVI ELEV: 1114.00 PVI STA: 0+66.62

PVI ELEV: 1113.00

PVI STA: 4+31.42

PVI ELEV: 1111.00

PVI STA: 4+84.93

PVI ELEV: 1111.05

PVI STA: 3+81.42

PVI ELEV: 1113.00

PVI STA: 4+06.42

PVI ELEV: 1111.00

-1

.0 0%

7.50%

10.50%

1.50%

-8.50%

-4.50%

0.00% 1.50%

PVI STA: 0+65.95

PVI ELEV: 1110.80

PVI STA: 0+71.63

PVI ELEV: 1105.12

PVI STA: 3+07.94

PVI ELEV: 1102.03

PVI STA: 3+31.15

PVI ELEV: 1104.46

PVI STA: 3+75.59

PVI ELEV: 1105.13

PVI STA: 3+80.95

PVI ELEV: 1110.49

PVI STA: 1+03.93

PVI ELEV: 1102.37

PVI STA: 1+68.37

PVI ELEV: 1099.47 PVI STA: 2+27.85

PVI ELEV: 1099.47

PVI STA: 2+85.40

PVI ELEV: 1100.34

36" RCP

NORMAL WATER LEVEL

ELEVATION = 1108.00

AUXILIARY SPILLWAY

CREST = 1111.00

CORE TRENCH EXCAVATION

- SEE DETAIL

PROPOSED TOP OF DAM CONSTRUCTION

GRADE = 1113.00

OVERBUILD TO 1113.50 TO ACCOMMODATE

FOR FUTURE SETTLEMENT

A B C D E F

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

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M oi ne s, Io w a

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In di an a

N eb ra sk a

W is co ns in

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HORIZONTAL SCALE

VERTICAL SCALE

NORTH

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3:1

0+00

1+00

1+60

70 TONS CLASS

'E' RIPRAP

PRECAST 4 X 4 (OPEN

DIMENSIONS) CONCRETE

RISER WITH FRONT FACING

STOP LOGS, SEE DETAIL

CUT IN CHANNEL FOR

DRAWDOWN

70 TONS CLASS E RIP RAP OVER

GEOTEXTILE FABRIC. MAINTAIN

DRAWDOWN CHANNEL AT 1103.50

PRINCIPAL SPILLWAY PIPE

36" RCP 78 LF

IE = 1103.0

IE = 1102.3

STOPLOG STRUCTURE

0+00.00 1+00.00 1+60.00

PROPOSED GRADE

EXISTING GRADE

PRINCIPAL SPILLWAY PIPE 79 LF

36" RCP @ 0.90%

70 TONS OF CLASS 'E' RIP RAP OVER

GEOTEXTILE, 2 FEET THICK.

16.00'

TOP WIDTH

TOP OF DAM

ELEVATION = 1113.00

2.0%

10' WIDE BENCH

NORMAL WATER LEVEL

ELEVATION = 1108.00

EXISTING POND WATER LEVEL

ELEVATION = 1101.30

6' X 6' ANTI-SEEP COLLAR

SPACING = 20'

- SEE DETAIL

IE = 1103.0

IE = 1102.3

GALVANIZED TRASH RACK

- SEE DETAIL

PRECAST 4 X 4 CONCRETE

RISER WITH FRONT FACING

STOP LOGS, SEE DETAIL

7X7 REINFORCED CONCRETE BASE.

- SEE DETAIL

AUXILIARY SPILLWAY

ELEVATION = 1111.00

PROPOSED GRADE AT DRAWDOWN CHANNEL

ALL OTHER AREA 3 TO 1 SLOPE

70 TONS CLASS E RIP RAP OVER

GEOTEXTILE 2 FEET THICK

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

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HORIZONTAL SCALE

VERTICAL SCALE

N O

D R

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Pr in te d: C302

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

6+00 7+00 8+

9+00 9+50

1A 394 LF

8" HDPE @ 0.86%

1B 5 LF

8" HDPE @ 0.83%

1C 333 LF8" HDPE @ 0.83%

1D 34 LF

8" HDPE @ 0.83%

1E 61 LF

8" HDPE @ 0.83%

1F 33 LF

8" HDPE @ 0.83%

1G 56 LF

8" HDPE @ 0.83%

20 LF 10" CMP OUTLET

IE = 1109.00

0+00.00 1+00.00 2+00.00 3+00.00 4+00.00 5+00.00 6+00.00 7+00.00 8+00.00 9+00.00 9+50.00

1A 394 LF

8" HDPE @ 0.86% 1B 5 LF

8" HDPE @ 0.83% 1C 333 LF

8" HDPE @ 0.83%

1E 61 LF

8" HDPE @ 0.83%

1F 33 LF

8" HDPE @ 0.83%

1D 34 LF

8" HDPE @ 0.83%

1G 56 LF

8" HDPE @ 0.83%

20 LF 10" CMP OUTLET

IE = 1109.00

0+00

1+00

2+00

3+00

4+00

2C 100 LF

12" HDPE @ 0.23%

2A 26 LF

12" HDPE @ 0.23%

2B 303 LF

12" HDPE @ 0.23%

20 LF 15" CMP OUTLET

IE = 1109.00

1+00.00 2+00.00 3+00.00 4+00.00 5+00.00

-0.23%

-25.00%

2A 26 LF

12" HDPE @ 0.23%

2B 303 LF

12" HDPE @ 0.23%

2C 100 LF

12" HDPE @ 0.23%

20 LF 15" CMP OUTLET

IE = 1109.00

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 U R E

L A

TEWARDSHIP

HORIZONTAL SCALE

VERTICAL SCALE

N O

HORIZONTAL SCALE

VERTICAL SCALE

D R

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D R

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2+00

3+00

4+00

4+75

3+00

4+00

4A 7 LF

8" HDPE @ 0.36%

1 L F

HDPE @

4C 6 LF

8" HDPE @ 0.36%

4D 102 LF

8" HDPE @ 0.37%

4E 3 LF

8" HDPE @ 0.35%

4F 214 LF

8" HDPE @ 0.20%

5D 151 LF

6" HDPE @ 0.43%

20 LF 10" CMP OUTLET

IE = 1109.00

20 LF 8" CMP OUTLET

IE = 1109.00

7B 73 LF

6" HDPE @

5.22%

7C 92 LF

6" HDPE @

1.36%

6" HDPE @

0.80%

0+00.00 1+00.00 2+00.00 3+00.00 4+00.00 4+75.00

4A 7 LF

8" HDPE @ 0.36%

4B 121 LF

8" HDPE @ 0.37%

4C 6 LF

8" HDPE @ 0.36%

4D 102 LF

8" HDPE @ 0.37%

4E 3 LF

8" HDPE @ 0.35%

4F 214 LF

8" HDPE @ 0.20%

20 LF 10" CMP OUTLET

IE = 1109.00

1+00

2+00

3+00 4+00

5+00

6+00

6+50

3A 4 LF

6" HDPE @ 0.46%

3B 61 LF

6" HDPE @ 0.46%

3C 63 LF

6" HDPE @ 0.46%

3D 69 LF

6" HDPE @ 0.46%

3E 73 LF

6" HDPE @ 0.46%

3F 72 LF

6" HDPE @ 0.46%

3G 5 LF

6" HDPE @ 0.46%

3H 134 LF

6" HDPE @ 0.32%

3I 145 LF

6" HDPE @ 0.33% 20 LF 8" CMP OUTLET

IE = 1109.00

20 LF 10" CMP OUTLET

IE = 1109.00

20 LF 8" CMP OUTLET

IE = 1109.00

0+00.00 1+00.00 2+00.00 3+00.00 4+00.00 5+00.00 6+00.00 6+50.00

-25.00%

-0.35%

3I 145 LF

6" HDPE @ 0.33%

3H 134 LF

6" HDPE @ 0.32%

3G 5 LF

6" HDPE @ 0.46%

3F 72 LF

6" HDPE @ 0.46%

3E 73 LF

6" HDPE @ 0.46%

3D 69 LF

6" HDPE @ 0.46%

3C 63 LF

6" HDPE @ 0.46%

3B 61 LF

6" HDPE @ 0.46%

3A 4 LF

6" HDPE @ 0.46%

20 LF 8" CMP OUTLET

IE = 1109.00

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 U R E

L A

TEWARDSHIP

HORIZONTAL SCALE

VERTICAL SCALE

NORTH

HORIZONTAL SCALE

VERTICAL SCALE

D R

O R

D B

O O

T N

N O

Pr in te d: C304

O O

N R

, I

\P ro je ct s\

0\ De liv er ab le s\ Dr aw in gs \1

_C ivi l\C

.d wg 6/

:3 8:

IOWA D

A R

E NT O F

A G R I C U L T U R E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

G G

O O

N R

1+00

2+00

0+00 0+75

1+002+00

5C 143 LF

6" HDPE @ 0.46%

6A 59 LF

6" HDPE @ 1.15%

7D 164 LF

6" HDPE @ 2.17%

6" HDPE

1.51%

0+00.00 0+75.00

6A 59 LF

6" HDPE @ 1.15%

1+00

2+00

3+00 4+00 4+50

5A 2 LF

6" HDPE @ 0.48%

5B 142 LF

6" HDPE @ 0.50%

5C 143 LF

6" HDPE @ 0.46%

5D 151 LF

6" HDPE @ 0.43%

6" H

.1 5%

20 LF 8" CMP OUTLET

IE = 1109.00

20 LF 8" CMP OUTLET

IE = 1109.00

0+00.00 1+00.00 2+00.00 3+00.00 4+00.00 4+50.00

-25.00%

-0.44%

5A 2 LF

6" HDPE @ 0.48%

5B 142 LF

6" HDPE @ 0.50% 5C 143 LF

6" HDPE @ 0.46% 5D 151 LF

6" HDPE @ 0.43%

20 LF 8" CMP OUTLET

IE = 1109.00

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 U R E

L A

TEWARDSHIP

HORIZONTAL SCALE

VERTICAL SCALE

RTH

NORTH

HORIZONTAL SCALE

VERTICAL SCALE

D R

O R

D B

O O

T N

N O

Pr in te d: C305

O O

N R

, I

\P ro je ct s\

0\ De liv er ab le s\ Dr aw in gs \1

_C ivi l\C

.d wg 6/

:3 9:

IOWA D

A R

E NT O F

A G R I C U L T U R E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

G G

O O

N R

1+00

2+00

3+00

4+00 4+501+

5C 143 LF

6" HDPE @ 0.46%

7B 73 LF

6" HDPE @ 5.22%

7C 92 LF

6" HDPE @ 1.36%

7D 164 LF

6" HDPE @ 2.17%

45 LF

6" HDPE @

1.51%

7A 18 LF

6" HDPE @ 0.80%

20 LF 8" CMP OUTLET

IE = 1102.00

0+00.00 1+00.00 2+00.00 3+00.00 4+00.00 4+50.00

7B 73 LF6" HDPE @ 5.22%

7D 164 LF

6" HDPE @ 2.17%

7E 45 LF

6" HDPE @ 1.51%

7A 18 LF

6" HDPE @ 0.80%

7C 92 LF

6" HDPE @ 1.36%

20 LF 8" CMP OUTLET

IE = 1102.00

0+00.00 1+00.00

8A 8 LF

10" HDPE @ 0.62%

8B 17 LF

10" HDPE @ 0.63%

8C 46 LF

10" HDPE @ 0.62%

20 LF 12" CMP OUTLET

IE = 1109.00

0+00

1+00

0+00

1+00

8A 8 LF

10" HDPE @ 0.62% 8B 17 LF

10" HDPE @ 0.63%

8C 46 LF

10" HDPE @ 0.62%

20 LF 12" CMP OUTLET

IE = 1109.00

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 U R E

L A

TEWARDSHIP

HORIZONTAL SCALE

VERTICAL SCALE

NORTH

D R

O R

D B

O O

T N

N O

Pr in te d: C306

O O

N R

, I

\P ro je ct s\

0\ De liv er ab le s\ Dr aw in gs \1

_C ivi l\C

.d wg 6/

:3 9:

HORIZONTAL SCALE

VERTICAL SCALE

NORTH

IOWA D

A R

E NT O F

A G R I C U L T U R E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

G G

O O

N R

0+00

1+00

0+00

1+00

8A 8 LF

10" HDPE @ 0.62% 8B 17 LF

10" HDPE @ 0.63%

8C 46 LF

10" HDPE @ 0.62%

20 LF 12" CMP OUTLET

IE = 1109.00

0+00.00 1+00.00

8A 8 LF

10" HDPE @ 0.62%

8B 17 LF

10" HDPE @ 0.63%

8C 46 LF

10" HDPE @ 0.62%

20 LF 12" CMP OUTLET

IE = 1109.00

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 U R E

L A

TEWARDSHIP

HORIZONTAL SCALE

VERTICAL SCALE

NORTH

D R

O R

D B

O O

T N

N O

Pr in te d: C307

O O

N R

, I

\P ro je ct s\

0\ De liv er ab le s\ Dr aw in gs \1

_C ivi l\C

.d wg 1/

P M

IOWA D

A R

E NT O F

A G R I C U L T U R E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

G G

O O

N R

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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1.5

1 1

MIN.

1.5

5' M

CORE TRENCH

SEE PROFILE VIEW ON SHEET C301

BACKFILL WITH COMPACTED IMPERVIOUS FILL

NOTE:

ALL DRAIN TILE IDENTIFIED DURING CORE TRENCH

EXCAVATION TO BE RECORDED. REMOVE DRAIN TILES IN

THEIR ENTIRETY FROM EMBANKMENT FOOTPRINT

A4 TYPICAL CORE TRENCH SECTION

NOTE:

PROJECT ENGINEER TO VERIFY THAT CORE TRENCH

EXCAVATION TERMINATES IN SUITABLE SOILS PRIOR

TO BACKFILLING.

D R

O R

D B

O O

T N

N O

Pr in te d: C501

--- --- CO

O N

O O

N R

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\P ro je ct s\

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O N

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6/ 5/

A M

36'' RCP

6' (MIN)

6' (M

PER PLANS

SECTION A

COMPACT BACKFILL AROUND

COLLAR AND PIPE WITH IMPERVIOUS

BACKFILL

PLACE COLLAR A MINIMUM

OF 3.0' FROM PIPE JOINTS

CUT ROUND HOLE IN RUBBER

MEMBRANE AND STRETCH

OVER PIPE. CLAMP WITH 1"

STAINLESS STEEL CLAMP

WOOD LUMBER FRAME TO

HOLD RUBBER MEMBRANE

A2 RUBBER MEMBRANE ANTI-SEEPAGE COLLAR

RUBBERIZED MEMBRANE

MEETING ASTM D2000

SPECIFICATIONS. FASTEN

MEMBRANE BETWEEN BOARDS.

NOTE:

MINIMUM THREE ANTI-SEEPAGE COLLARS SHALL BE

INSTALLED ALONG THE PRINCIPAL SPILLWAY AS SHOWN ON

SHEET C301.

NORMAL WATER LEVEL

48"

36" RCP

IE = 1103.00

12"

MIN

12" MIN

ELEV=1108.00

INSTALL A FLEXIBLE WATER-TIGHT

SEAL AROUND PIPE PENETRATIONS

(A-LOK STM CONNECTOR OR

PRE-APPROVED EQUIVALENT)

6''

TYP.

6" MIN

GALVANIZED TRASH RACK INCIDENTAL TO

STRUCTURE WITH ANIT-VORTEX

AFINITAS RAISED BOX GRATE #BCTM4X4

OR APPROVED EQUAL.

A36 STEEL AND HOT DIPPED GALVANIZED.

PROVIDE LOCK FOR ACCESS GATE.

COMPACT BACKFILL AROUND

PIPE AND STRUCTURES WITH IMPERVIOUS

BACKFILL AND GRANULAR BENTONITE

MIXTURE (10% BENTONITE BY DRY WEIGHT)

(MINIMUM 300 POUNDS OF BENTONITE

PER CUBIC YARD OF BACKFILL). GRANULAR

BENTONITE BACKFILL MIXTURE REQUIRED

FOR WATER CONTROL STRUCTURE AND

79 LF OF PIPE BACKFILL.

SECURE 6'' WIDE, 14'' THICK GALVANIZED

STEEL PLATE WITH 12'' CONCRETE

EXPANSION ANCHORS SPACED 12'' ON

CENTER HORIZONTALLY. SEAL TO

PREVENT LEAKAGE.

ELEV=1103.50

TOP OF NON-REMOVABLE/

BOTTOM OF REMOVABLE STOP LOG

12"

MIN

#4 BARS @ 12" O.C. EACH WAY

3" CLEAR TO BOTTOM (TYP)

OR MONOLITHIC BASE

FLOW

PRE-CAST CONCRETE RISER

CONTRACTOR SHALL SUBMIT

SHOP DRAWINGS FOR

APPROVAL

#4 BARS @ 12''

O.C. BOTH WAYS

36'' DIAMETER RCPP

PRINCIPAL OUTLET PIPE

7'X7' REINFORCED

CONCRETE BASE

36"

2'' ALUMINUM

STOPLOGS

INSTALL A FLEXIBLE WATER-TIGHT

SEAL AROUND PIPE PENETRATIONS

(A-LOK STM CONNECTOR OR

PRE-APPROVED EQUIVALENT)

PLAN VIEW - PRIMARY WATER CONTROL STRUCTURE

2.00''

0.75''

NOTE:

ALL ALUMINUM 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 EIGHT (8) STOP-LOGS TO THE

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

THE OUTLET CONTROL STRUCTURE.

12''

4.00'

2.25''

NOTE:

TWO (2) LIFTING HOOKS REQUIRED

WATER CONTROL STRUCTURE

ALUMINUM STOP LOG LENGTH 1'' LESS

THAN TIGHT FIT. FIELD VERIFY LENGTH.SPACE 12" CONCRETE

EXPANSION ANCHORS 12'' ON

CENTER VERTICALLY. (TYP)

2.0" 2.5''2.

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

0.75''

LIFTING HOLES

NOTE:

CONTRACTOR TO DRILL 3 8" HOLES IN TOP OF STOP

LOG CHANNELS AND PROVIDE TWO (2) PADLOCKS TO

LOCK THROUGH CHANNELS TO PREVENT LOGS FROM

BEING LIFTED OUT WHEN LOCK IS IN PLACE.

SEAL BACKSIDE

OF ANGLES TO

PREVENT

LEAKAGE

(TYP.)

5.5''

8''

L 3 X 3 X 3 8

GALVANIZED

(TYP)

6'' WIDE, 14''

THICK

GALVANIZED

STEEL PLATE

D1 STOP LOGS AND CHANNEL

CROSS SECTION

F4 STOP LOG LIFTING HOOK

BACK FACE OF LOGS TO ALIGN WITH

INSIDE FACE OF CONCRETE STRUCTURE

D3 WATER CONTROL STRUCTURE AND PRINCIPAL OUTLET (MODIFIED SW-302)

TOP

ELEV=1109.00

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

4.5 LF 24" DIA DUAL WALL

HDPE BURIED FOR STOP

LOG STORAGE STRUCTURE

COMPACTED SUB-BASE,

8" THICK

24" DIA. COVER. AGRIDRAIN GR24P

GRATE AND COLLAR OR APPROVED

EQUAL.

D4 STOP LOG STORAGE STRUCTURE

12"

MIN

IOWA D

A R

E NT O F

A G R I C U L T U R E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

G G

O O

N R

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

EN T O F

A G R I C U L T UR E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

Pr in te d: C502

S G

O O

N R

, I

\P ro je ct s\

0\ De liv er ab le s\ Dr aw in gs \1

_C ivi l\C

O N

dw g

6/ 5/

A M

36"

MAX.

- 2 .5

PROPOSED GRADE

HAND-PLACED

MATERIAL, NO ROCKS.

TAMP IN LIFTS

SOLID PIPE

(NON-PERFORATED

SLOPE CONTINUOUSLY

TOWARD OUTLET

BACKFILL WITH

EXCAVATED

MATERIAL AND

COMPACT IN LIFTS

D2 TILE TRENCH

BOTTOM OF EXCAVATION,

CONTRACTOR SHALL USE TILE SPOON

OR APPROVED EQUIVALENT TO

ENSURE HAUNCH SUPPORT

NWL = 1108.00

PROPOSED GROUND

ELEV = 1107.75

10' MINIMUM

REFER TO GRADING PLAN

WAVE BENCH

D3 WAVE PROTECTION BENCH AT NWL

ELEV = 1108.25

MATCH INVERTS

2D INSTALL APPROPRIATELT 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

D4 FIELD TILE REPAIR CONNECTION

A2 TILE DAYLIGHT AT WETLAND

JOINT

COUPLING

20 LF 18" ALUMINIZED CMP

OUTLET SECTION

FINAL GRADE

N O

R M

O O

L D

1' A

N W

L NWL

PROPOSED DUAL WALL TILE

INSTALL RODENT GUARD

EROSION STONE. 18"

THICK OVER CLASS I

NON-WOVEN GEOTEXTILE

36" RCP

CANTILEVERED

OUTLET PIPE CRADLE

CAST-IN-PLACE

REINFORCED CONCRETE

CANTILEVER OUTLET BENT WITH #4

BARS @ 12'' OC EACH WAY

IE = 1102.00

NON-WOVEN

GEOTEXTILE FABRIC

PLACE 2' OF CLASS 'E' REVETMENT

AND LINE WITH NON-WOVEN

GEOTEXTILE FABRIC

A4 PIPE CANTLIEVER OUTLET

NWL = 1101.30

ELEVATION = 1101.50

12"

ELEVATION = 1097.00

7'-6'' X 4' X 12'' BASE WITH TWO (2)

MATS OF #4 AT 12'' O.C. EACH WAY

TIE LAST

THREE JOINTS

IOWA D

A R

E NT O F

A G R I C U L T U R E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

G G

O O

N R

A2 TILE COVER BERM

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

EN T O F

A G R I C U L T UR E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

Pr in te d: C503

S G

O O

N R

, I

\P ro je ct s\

0\ De liv er ab le s\ Dr aw in gs \1

_C ivi l\C

O N

dw g

6/ 5/

A M

1+00.000+50.00

6.00'

TOP WIDTH

EXISTING GRADE

TILE COVER

PROPOSED GRADE

HDPE TILE

DOWNSTREAMUPSTREAM

C3 TYPICAL EMBANKMENT CROSS SECTION

WAVE BENCH

- SEE DETAILNWL = 1108.00 3

16.00'

8.00'

' S

N G

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 = 1113.00TOP OF DAM CORE

IOWA D

A R

E NT O F

A G R I C U L T U R E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

G G

O O

N R

JENSEN,

MARY & DAVID

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 U R E

L A

TEWARDSHIP

D R

B Y

D B

O R

E D

D B

O O

T N

U M

Pr in te d: C601

10 --- ---H

N N

R W

N D

, I

\P ro je ct s\

0\ De liv er ab le s\ Dr aw in gs \1

_C ivi l\C

G P

dw g

6/ 5/

A M

LEGEND

DESCRIPTION

NORMAL WATER LEVEL

STUCTURE SEEDING

BUFFER SEEDING

MAJOR CONTOUR (EXISTING)

MINOR CONTOUR (EXISTING)

LINE TYPE

EASEMENT BOUNDARY

PROPERTY BOUNDARY

NORTH

WETLAND POOL

MAJOR CONTOUR (PROPOSED)

MINOR CONTOUR (PROPOSED)

IOWA D

A R

E NT O F

A G R I C U L T U R E

L A

TEWARDSHIP

D R

O R

D B

O O

T N

N O

G G

O O

N R

	2026-06-05T15:42:50+0000
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