26-01-30-01 - Plans.pdf

PDF 12 MB Posted May 27, 2026

Attached to: Hodge WPA Wetland Restoration, Great Lakes Wildlife Unit, Dickinson County
Solicitation number: 26-01-30-01
Issued by: Des Moines County, Iowa

About this file

Written by GovTribe AI · May 29, 2026

This file comprises construction plans and technical documents prepared by the Iowa Department of Natural Resources (DNR) Engineering Section for the Hodge Wildlife Protection Area (WPA) Wetland Restoration project located in Dickinson County, Iowa. The project involves the construction of four dikes with associated water control structures, emergency spillways, and drainage tile systems to restore four wetland pool areas on the property. Work scope includes embankment construction, excavation for spillways and borrow material, tile investigation and breaks, installation of in-line water control structures (WCS) tied to existing drainage district tile, fireproof covers, and erosion control measures. The project is designed to enable water-level manipulation for wetland restoration while providing water quality and wildlife habitat benefits. Contractors are required to conduct site visits prior to bidding to verify existing conditions, dimensions, and utility locations. The bid closing date is June 11, 2026, at 3:00 PM, with electronic submission required as directed in the bidding instructions.

The construction plans designate four separate dike locations (North, Southwest, Middle, and East) with specific elevation requirements ranging from 1470.0 to 1485.0 feet at dike tops. Each dike features 5:1 side slopes, 12-foot top widths, and associated emergency spillways with varying configurations. Contractors must obtain an NPDES Permit #2 for stormwater discharge and develop a required Stormwater Pollution Prevention Plan (SWPPP) with completion of required inspections. The Iowa DNR will supply certain materials including specific water control structures and tiles, with contractors responsible for providing 1-inch clean stone and other construction materials as detailed in the line items. The contractor must locate and accommodate existing drainage district tile infrastructure, which has been plotted from available surveys but is considered approximate only. Responsibility for identifying and avoiding interference with unknown utilities and infrastructure lies entirely with the contractor, with no claims for additional compensation allowed.

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Capital Manager Authorization - Wildlife

This project includes construction of four dikes to restore wetlands on the Hodge WPA. One of the dikes has in-line water control structures tied into existing Drainage District tile to allow for water-level manipulation. Wetland restoration, water quality, and wildlife habitat benefits are the main objectives of this project.

Iowa DNR

TJ Herrick

515-250-3715 tj.herrick@dnr.iowa.gov

3120 330th Avenue

Ruthven, IA, USA

Iowa Department of Natural Resources Construction Documents for

Great Lakes Wildlife unit Dickinson County, Iowa

T100N, R37W, Section 23 Hodge WPA Wetland Resto.

Project No. 26-01-30-01

Project Location Map

Sheet Index

Cover Sheet Project Vicinity Project Overview Quantities & General Information N Dike & Spillway Plan & Profile SW Dike & Spillway Plan & Profile Middle Dike & Spillway Plan & Profile E Dike & Spillway Plan & Profile Dike & Spillway Section Views Fire Proof Cover & Pipe Detail Typ. In-Line WCS w/ Intake Plan & Profile DD TIle Profiles (FG)

Iowa DNR

Jeff Felts

515-250-3712 jeff.felts@dnr.iowa.gov

951 Starview Dr.

Hinton, IA 51024 Engineering Bureau Chief

Authorization to Bid

Date

Directory Project Manager

Organization

Contact

Phone

Address

City, State, Zip

District Engineer Organization

Contact

Phone

Address

City, State, Zip

Project Description

Project Number:

26-01-30-01

Bid Date:

mm/dd/yyyy

Iowa Department of Natural Resources Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

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Revision 90% Final

Date 2/3/26

5/27/26

Cover Sheet

Project Area

Source: Esri, Vantor, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community Powered by Esri

Project Number:

26-01-30-01

Bid Date:

mm/dd/yyyy

Iowa Department of Natural Resources Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

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Revision 90% Final

Date 2/3/26

5/27/26

Project Vicinity

West Lake Okoboji

Project Location

Big Spirit Lake

Y 86

130th St

12'

0' 86' 172'

Project Number:

26-01-30-01

Bid Date:

mm/dd/yyyy

Iowa Department of Natural Resources Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

Sheet No:Drawn by: xx

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Revision 90% Final

Date 2/3/26

5/27/26

Project Overview

New Perf 5"

New Non-Perf 8"

In-Line 10" x 6' WCS w/ Intake, Fireproof Cover & Tile Break

In-Line 12" x 8' WCS w/ Intake, Fireproof Cover

& Tile Break

Intake

Tile Break

E Emergency Spillway

N Emergency Spillway

SW Emergency Spillway

Middle Emergency Spillway

Intake

DD Tile HW Y 86DD Tile

Middle Dike

E Dike

N Dike

SW Dike

New Non-Perf 10"

Access from HWY 86

Coupler for new 5" to DD Tile

Full Pool

Project Number:

26-01-30-01 Bid Date:

mm/dd/yyyy Iowa Department of Natural Resources

Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

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Revision 90% Final

Date 2/3/26

5/27/26

Quantities & General Information

General Information

1. Verify actual locations and elevations with DNR Engineer.

2. All work shall conform to and be performed in accordance with all applicable codes and ordinances.

3. The contractor shall visit the site and inspect the project area and thoroughly familiarize themselves with the actual job conditions prior to bidding and the start of work. Failure to visit the project site shall not relieve the contractor from performing the work in accordance to the plans, specification, special provisions and contract.

4. The contractor shall verify, at the site, all dimensions and conditions shown on the plans and shall notify the DNR Engineer of any discrepancies, omissions, and/or conflicts prior to proceeding with the work.

5. It shall be the contractor's responsibility to provide waste areas or disposal sites for excess material (excavated material or broken concrete) which is not desirable to be incorporated into the work involved on this project. No payment for overhaul will be allowed for material hauled to these sites.

No material shall be placed within the right-of-way, unless specifically stated in the plans or approved by the DNR Engineer.

6. The contractor shall not disturb desirable grass areas and desirable trees outside the construction limits. The contractor will not be permitted to park or service vehicles and equipment or use these areas for storage of materials. Storage, parking and service areas will be subject to the approval of the DNR Engineer.

7. Where utilities and fixtures are shown as Existing on the plans or encountered within the construction area, it shall be the responsibility of the contractor to notify the DNR Engineer of those utilities prior to the beginning of any construction. The contractor shall be afforded access to these facilities for necessary modification of services. Underground facilities, structures and utilities have been plotted from available surveys and records and therefore their locations must be considered approximate only. It is possible there may be others, the existence of which is presently not known or shown. It is the contractor's responsibility to determine their existence and exact location and to avoid damage thereto. No claims for additional compensation will be allowed to the contractor for any interference or delay caused by such work.

8. The contractor shall shape graded area to maintain surface drainage. All elevations are to finish grade.

9. The contractor is expected to have materials, equipment, and labor available on a daily basis to install and maintain erosion control features on the project. This may involve seeding, silt fence, rock ditch checks, silt basins or silt dikes.

Estimate Reference Information 1.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

24.

Site is accessible form Hwy 86

Stripped topsoil shall be stockpiled at location identified by DNR Field Engineer.

Excavated material must be obtained from within the wetland pool area and originate no closer than 30' to footprint of dike.

Tile break shall be preformed with excavator and be a minimum of 100' in length

DNR Supplied (Contractor to supply the 1" clean stone under line item #22)

DNR Supplied

Drainage tile shall meet ASTM F 405-13 and AASHTO M 252-09 specifications.

Perforated 4' 18ga galvanized CMP. Contractor to include connection to HDPE tile below grade. HDPE riser to be paid under the 8" dual wall non-perf tile line item. Steel rod stop to be incidental to construction.

Tile coupler shall meet ASTM F 405-13 and AASHTO M 252-09 specifications and size shall be determined based on what is encountered during tile search.

DNR Supplied

Two anti-seep collars are required, one will be DNR supplied

Agri Drain HD Bar Guard or DNR Engineer approved equivalent

Two 10" tees are required, one will be DNR supplied. Tee shall meet ASTM F 405-13 and AASHTO M 252-09 specifications

Tee shall meet ASTM F 405-13 and AASHTO M 252-09 specifications

The contractor shall obtain an NPDES Permit #2 for stormwater discharge, develop the required SWPPP, and complete the required inspections.

0' 28' 56'

Project Number:

26-01-30-01

Bid Date:

mm/dd/yyyy

Iowa Department of Natural Resources Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

Sheet No:Drawn by: xx

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Revision 90% Final

Date 2/3/26

5/27/26

N Dike & Spillway Plan & Profile

Tile Break & New 10" Non-Perf Tile

In-Line 10" x 6' WCS w/ Fireproof Cover & Intake

20'

3:13:1

Notes:

1. Top of dike elev. 1470.0'

2. 5:1 side slopes on dike

3. Dike top width 12'

4. 6" of topsoil to be stripped under foot print of dike

5. WCS Intake elev. 1467.0'

6. Spillway elev. 1469.0'

7. Spillway bottom width 20'

8. Spillway side slopes 3:1

9. No borrow w/in 30' of dike footprint

10. Seepage tile >50' north of centerline of dike

"Blister" Berm

Coupler to DD Tile

Intake

5" Seepage Tile > 50' from centerline of dike

Undisturbed DD Tile

40' of 12" Straw Wattle

0' 18' 36'

Project Number:

26-01-30-01

Bid Date:

mm/dd/yyyy

Iowa Department of Natural Resources Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

Sheet No:Drawn by: xx

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Revision 90% Final

Date 2/3/26

5/27/26

SW Dike & Spillway Plan & Profile

Tile Break

Notes:

1. Top of dike elev. 1472.8'

2. 5:1 side slopes on dike

3. Dike top width 12'

4. 6" of topsoil to be stripped under foot print of dike

5. Spillway elev. 1471.8'

6. Spillway bottom width 8'

7. Spillway side slopes 3:1

8. No borrow w/in 30' of dike footprint

Dike Emergency Spillway

0' 11' 22'

Project Number:

26-01-30-01

Bid Date:

mm/dd/yyyy

Iowa Department of Natural Resources Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

Sheet No:Drawn by: xx

\S ha re d dr iv es

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Revision 90% Final

Date 2/3/26

5/27/26

Middle Dike & Spillway Plan & Profile

Tile Break

3:1

Emergency Spillway

Dike

Notes:

1. Top of dike elev. 1485.0'

2. 5:1 side slopes on dike

3. Dike top width 12'

4. 6" of topsoil to be stripped under foot print of dike

5. Spillway elev. 1484.0'

6. Spillway bottom width 8'

7. Spillway side slopes 3:1

8. No borrow w/in 30' of dike footprint

0' 22' 45'

Project Number:

26-01-30-01

Bid Date:

mm/dd/yyyy

Iowa Department of Natural Resources Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

Sheet No:Drawn by: xx

\S ha re d dr iv es

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Revision 90% Final

Date 2/3/26

5/27/26

E Dike & Spillway Plan & Profile

In-Line 12" x 8' WCS w/ Fireproof Cover & Intake See Details Sheet 12

Intake & Coupler to DD Tile

12'

3:1 3:1

Emergency Spillway

Dike

"Blister" Berm

Notes:

1. Top of dike elev. 1479.0'

2. 5:1 side slopes on dike

3. Dike top width 12'

4. 6" of topsoil to be stripped under footprint of dike

5. Spillway elev. 1478.0'

6. Spillway bottom width 12'

7. Spillway side slopes 3:1

8. No borrow w/in 30' of dike footprint

9. WCS Intake elev. 1476.0'

Coupler to DD Tile

500' of 12" Straw Wattle

8" Dual Wall

26-01-30-01 Bid Date:

mm/dd/yyyy Iowa Department of Natural Resources

Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

Sheet No:Drawn by: xx

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Revision 90% Final

Date 2/3/26

5/27/26

Dike & Spillway Section Views

6" Stripping

Existing Ground

Dike

12'

Typ. Dike Section

Varies

Typ. Spillway Section

Tile Search

Notes:

1. Tile search shall be performed along entire length of dike

2. Tile search depth to a minimum of 5'

3. Tile search shall be conducted with an excavator.

4. Tile search will be located along wetland side of dike at location approved by DNR Field Engineer

Va rie s

Existing Ground

AutoCAD SHX Text

Hinge Bracket Piece

20"

2' 2'

Corrugated Metal Pipe 36" Diam. - 16 guage w/ 3"x1" Corr.

WELD EVERY

CORRUGATION

2-2"X1 4"

Plates w/

2" diam hole welded to lid and cmp riser

AGRIDRAIN WCS

1'-8"

1' -8

1 12"X1 4" Bars welded to plate

2"X1

4" Steel bar

2' 21 2"X1

4" Steel Bar

2 -1/4"

1" Chamfer

A-A

B-B

36"

8" Steel Plate

2" Stainless steel bolt w/ stainless steel nylock nut

2"X1

4" Steel Bar

Hinge Bracket Piece

Weld

INCLUDE CHAIN TO

SECURE LID AS

APPROVED BY DNR

INSPECTOR.

CMP

Project Number:

26-01-30-01 Bid Date:

mm/dd/yyyy Iowa Department of Natural Resources

Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

Sheet No:Drawn by: xx

\S ha re d dr iv es

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M Pl ot D at e:

Revision 90% Final

Date 2/3/26

5/27/26

Fire Proof Cover & Pipe Anchor Detail

Fire Proof Cover Detail

1" Clean Stone

AutoCAD SHX Text

HINGE BRACKET PIECE 2 TOTAL NO SCALE

3.0207

26-01-30-01 Bid Date:

mm/dd/yyyy Iowa Department of Natural Resources

Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

Sheet No:Drawn by: xx

\S ha re d dr iv es

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M Pl ot D at e:

Revision 90% Final

Date 2/3/26

5/27/26

Typ. In-Line WCS w/ Intake Plan & Profile

Tee to DD Tile & Intake

In-Line WCS w/ Fireproof Cover & Intake

Intake Set 3' Below Top of Dike

40' of Dual Wall Non-Perf Tile

"Tee" 4'x4' Anti-Seep Collar

"Blister" Berm with Erosion Stone

12'

1" Clean Stone w/in 36" CMP

1' Depth of Erosion Stone

60' of Dual Wall Non-Perf Tile

Heavy Duty Bar Guard Inlet elev. 3' below top of dike

Dual Wall Non-Perf Riser Height Determined On Site by DNR Field Engineer

6" Stripping

Existing Ground

Coupler to DD Tile

Dual Wall Non-Perf Tile

Agri Drain WCS

Erosion stone extends 1' down slope of intake

Revetment Stone Filter

6" Heavy Duty Bar Guard

6" Perforated CMP

8" Heavy Duty Bar Guard

Ø6'

Intake Plan View

8" Plastic tile

Nest 6" CMP into 8" HDPE tile.5

Revetment Stone Filter

Existing Ground

Intake Connection Detail WCS Plan View

WCS Plan View

1' x 38" steel rod stop

AutoCAD SHX Text

26-01-30-01 Bid Date:

mm/dd/yyyy Iowa Department of Natural Resources

Engineering Section - 6200 Park Ave., Suite 200 Des Moines, IA 50321-1270

Hodge WPA Wetland Restoration T100N, R37N, Sec. 23 Dickison County

Sheet No:Drawn by: xx

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Revision 90% Final

Date 2/3/26

5/27/26

Tile Profiles

WCS & Fire Proof Cover

Intake to 5" Tile

Top Dike Elev 1470.0'

Intake Elev. 1467.0'

Coupler to DD Tile

Tee to DD Tile & Intake

New 8" Tile - Match Existing Grade

WCS & Fire Proof Cover

Intake

Top Dike Elev 1479.0'

Intake Elev. 1476.0'

Coupler to DD Tile

Tee to DD Tile & Intake

Branch 83-7-31-B

Branch 63

DD Tile

Roadway

File details come from the government source that posted it. Updated May 29, 2026.