5 2022 Diversion Channel FCR_Part_1.pdf

Net River Dam Channel Construction Project Final Construction Report Michigan Department of Natural Resources – MI Dam ID

Submitted to:

Mr. Bill Scullon Michigan Department of Natural Resources 520 West US Hwy 2 Norway, Michigan 49870

Submitted by:

GEI Consultants of Michigan, P.C.

109 W. Baraga Avenue Marquette, Michigan 49855

January 18, 2023 Project No. 2201765

Jacob Pieti, P.E.

Project Manager

Consulting

Engineers and

Scientists

Geoffrey L. Kruger, P.E.

E ngi neer of Record

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. i

Table of Contents

1. Introduction 1

1.1 Background 1

1.2 Project Description 1

1.3 Purpose 2

1.4 Project Team 2

1.4.1 Project Owner 3

1.4.2 Engineer of Record 3

1.4.3 Construction Contractor 3

1.4.4 Construction Observation and Documentation 3

1.4.5 Environmental Representative 4

1.5 Vertical and Horizontal Datum 4

2. Summary of Construction Activities 5

2.1 Overview 5

2.2 Construction Equipment 5

2.3 Concrete Intake Structure Notch 6

2.4 Site Preparation 6

2.5 Temporary Cofferdam Construction 7

2.6 Channel Construction 7

2.7 Cofferdam Removal 8

2.8 Restoration 8

2.9 Stoplog Installation 8

2.10 Demobilization 9

3. Summary of Deviations from Plans and Specifications 10

4. Quality Control 11

4.1 Construction Documentation 11

4.1.1 Daily Construction Reports 11

4.2 Materials Testing 11

5. Summary of Submittals and Construction Materials 12

6. General Qualifications and Certification 13

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. ii

Appendices A. Record Drawings B. Construction Photographs C. Contractor Technical Submittals D. Contractor RFIs E. Materials Testing Results F. Daily Field Reports G. Certification Letter

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 1

1. Introduction

1.1 Background

The Michigan Department of Natural Resources (MDNR) has completed the Net River Dam Channel Construction at the recreational Net River Dam Project near Covington, Michigan.

The construction activities consisted of the following major components:

• Mobilization

• Site Preparation

• Temporary Bridge Installation

• Concrete Intake Structure Notch Construction

• Site Clearing

• Cofferdam Construction

• Channel Excavation

• Cofferdam Removal

• Stoplog Installation

• Site Restoration

• Demobilization

The design improvements were provided in project plans and specifications prepared by GEI Consultants of Michigan, P.C. (GEI). The MDNR submitted the design report to the Michigan Department of Environment, Great Lakes, and Energy (EGLE) with the Joint Permit Application (JPA) dated October 14, 2022. The concrete notch drawings were issued for construction on September 12, 2022, with the stoplog slot drawing issued for construction on September 21, 2022. The channel drawings were issued for construction on October 14, 2022. The EGLE authorized construction with approval of the JPA dated September 29, 2022.

1.2 Project Description

The Net River Dam (MI Dam Inventory No. 131) is classified as a low hazard dam under Part 315 and located on the Net River in Baraga County, Michigan. The Net River Dam is owned and operated by the MDNR Wildlife Division. The dam provides environmental and recreational opportunities for the public by the creation of the reservoir impoundment, the Net River Flooding, and roadway access to the opposite side of the river. The dam was

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 2 originally constructed in 1953 but failed in 1985 when the embankment dam overtopped due to debris blockage of the intake structure. The dam was reconstructed in 1989 as part of a wetland mitigation project sponsored by the Tilden Magnetite Partnership.

The dam consists of a reinforced concrete intake structure transmitting flow via two six-foot diameter corrugated metal pipe (CMP) culverts through an earth embankment to a reinforced concrete outlet structure. The intake structure has a notch in the upstream face with steel stoplogs and is fully encased by steel trash racks. The embankment dam is approximately 435 feet long with a twenty-foot-wide (20) crest and 3:1 (horizontal to vertical) upstream and downstream slopes.

On April 28, 2022, a sinkhole on the embankment dam crest over the right (west) culvert was observed. The sinkhole revealed turbulent water above the crown of the barrel pipe. The water was gradually eroding the embankment crest causing progressive embankment loss through the barrel pipe. However, the embankment crest was not fully breached. The MDNR responded by working with local earthwork contractors to backfill the sinkhole.

The MDNR reached out to GEI on Monday, May 2, 2022, and GEI inspected the site on Thursday, May 5, 2022. Following the initial inspection, the MDNR worked to dewater the reservoir. GEI returned to the site on Wednesday, July 27, 2022, to conduct an internal dewatered inspection of the left (east) CMP culvert and intake structure. The July inspection identified severe corrosion and deterioration within the remaining open left culvert. The channel construction project was expedited as a result of the inspection findings as detailed in the field inspection report (detailing both inspections) dated August 11, 2022.

The primary goal of the Net River Dam Temporary Bypass Channel Project is to provide means of safely managing flows at the site, which are typically observed during spring runoff.

The bypass channel is intended to provide adequate means of safely managing site flows for one season pending future design of a permanent solution to mitigate dam safety issues at the site.

1.3 Purpose

The purpose of this final construction report is to summarize the equipment, materials, methods of installation and deviation from the plans and specifications during construction as required by the EGLE JPA. Record drawings that document the final construction details are included within Appendix A of this report.

1.4 Project Team

The primary parties engaged in the Net River Dam Channel Construction project are detailed in the following sections.

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 3

1.4.1 Project Owner

The Project site is owned by MDNR and operates the project as a recreational impoundment.

The following personnel contributed to the project:

• Michelle Crook – MDNR Senior Project Manager

• Bill Scullon – MDNR Project Manager

• John DePue – MDNR Wildlife Biologist

• Brad Johnson – MDNR Wildlife Biologist

1.4.2 Engineer of Record

The Engineer of Record is GEI Consultants of Michigan, P.C., and the following personnel contributed to the project:

• Jacob Pieti, P.E., – Project Manager

• Geffrey L. Kruger, P.E. – Engineer of Record (Channel Construction)

• Richard Price, P.E., – Engineer of Record (Concrete Intake Structure Notch)

1.4.3 Construction Contractor

The General Contractor for this project was MD Contracting (MDC) with assistance from construction surveying subcontractor TriMedia Environmental Engineering (TMEE). The concrete notch cutting was performed by Terrazzo Creations and Renewal (TCR). The following personnel contributed to the project:

• Dan Robillard – Project Manager (MDC)

• Mike Delene – Owner/Site Supervisor (MDC)

• Mike Begres – Owner/Foreman (TCR)

• Stacey Bluse – Project Manager (TMEE)

1.4.4 Construction Observation and Documentation

Construction observation, GEI performed documentation, material testing, and as-constructed survey. The following personnel executed the field work:

• Jacob Pieti, P.E. – Project Manager (GEI)

• Bruce Peterson, E.I.T. – Senior Field Engineer (GEI)

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 4

• Patrick Dowling, E.I.T. – Project Engineer (GEI)

• Jacob Burch, E.I.T – Project Engineer (GEI)

1.4.5 Environmental Representative

The following environmental representative for this project was:

• Mike Delene –Environmental Representative (MDC)

• Mike Begres –Environmental Representative (TCR)

1.5 Vertical and Horizontal Datum

Elevations listed herein are referenced to the North American Vertical Datum of 1988 (NAVD88). Horizontal spatial datum referenced to the North American Datum of 1983

(NAD83).

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 5

2. Summary of Construction Activities

2.1 Overview

The EGLE Dam Safety accepted the design documents and authorized the construction of the channel. The channel project was directly managed by MDNR staff with GEI providing construction oversight. The work was performed by MDC and TCR. TCR mobilized to the site on October 3, 2022 and completed the concrete notch construction on October 6, 2022.

MDC mobilized to commence the channel work on October 24, 2022 and was substantially complete by November 15, 2022.

The following subsections provide a general summary of the work conducted for this project.

Construction photographs of the control structure modification and channel construction projects are included in Appendix B. Additional supporting construction documentation is included within the following appendices.

• Appendix A – Record Drawings

• Appendix B – Construction Photographs

• Appendix C – Contractor Technical Submittals

• Appendix D – Contractor RFIs

• Appendix E – Material Testing Results

• Appendix F – Daily Field Reports

• Appendix G – Certification Letters

2.2 Construction Equipment

The work completed by MDC and TCR was conducted primarily with the equipment listed below. The construction equipment can be seen in many of the photographs included in Appendix B.

• 3 – Excavators – Caterpillar 349F, 336F, 323F

• 1 – Loader – Caterpillar 950 M

• 2 – Dozers – John Deere 700K, Caterpillar D6N

• 1 – Broderson Mobile Crane

• 3 – Off Road Dump Trucks – 1 – Volvo A25F and 2 – John Deere 250D

• Truck with Grapple Loader

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 6

2.3 Concrete Intake Structure Notch

TCR mobilized to the site on October 3, 2022, set up erosion control measures and a submersible pump to dewater the right inlet to the control structure. The pump was discharged into a filter bag, installed to the right of the concrete structure. The work area was contained with sandbag cofferdams in the invert of the concrete intake structure, lined with geotextile fabric. TCR cored 2 holes in the existing concrete wall to aid in saw cutting activities. The cores were retained and the location, size, and spacing of reinforcement steel was documented by GEI. The existing concrete was removed in 2 sections. The upper 3.5’ of concrete was sawcut and removed. A temporary wood bulkhead was constructed upstream of the structure and the remaining 1.5’ of the 5’ below the top of the structure was cut and removed, as depicted on the drawings. The location, size, and spacing of the existing reinforcement steel was documented by GEI. TCR installed the steel channel stop log slots by drilling and epoxying anchors into the concrete with Hilti Hit 200 HY. The interface of the concrete and steel stoplog channel were sealed using Aquabond Aquaflex AFW 8000-400 underwater sealant.

The steel channel stoplog slots were adjusted approximately 1” downstream from the design drawing due to the existing wall concrete variation in thickness to maintain a clear distance a minimum of 3 ½” between the anchors and the upstream face of the concrete. The temporary wood bulkhead was removed, and the notch utilized. The concrete intake structure managed all reservoir flows during construction of the channel through both the pre-existing notch and new notch until the channel was commissioned.

2.4 Site Preparation

Prior to mobilizing to the site, MDC obtained the Baraga County SESC Permit and the MDNR obtained the EGLE JPA. The MDNR permitted use of the Net River Boat Launch area as a construction staging area. MDC installed a temporary steel bridge on wood timber mat cribbing to span over the existing culverts to provide access to the right embankment and areas to the west of the project. SESC measures including turbidity curtains and silt fence were installed. Areas were cleared to the southwest and northwest of the dam right abutment for stockpiling materials deemed to be unsuitable for re-use. Access roads were cleared for construction equipment access. Clearing also occurred to the southeast of the existing gravel parking lot for stockpiling excavated material to be possibly used for future construction.

MDC removed existing rip rap and armor stone from the upstream slope of the embankment and stockpiled them at the cleared southeast area for future reuse for the construction of the cofferdam. A temporary access road of wood timber mats was constructed to provide equipment access upstream and downstream of the existing dam.

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 7

Construction staking was performed by TMEE on October 24, 2022. TMEE provided survey control points, elevation benchmarks, and staked proposed alignments of the cofferdam and channel. After review of the slope stakes for the channel, it was determined that excavation of the left slope of the channel would interfere with the temporary bridge and prohibit construction vehicle access. The upstream end of the proposed alignment at station 0+00 and the point of intersection (PI) point at station 1+21.7 were shifted approximately 15’ to the west and the outlet point of the channel remained as per the design drawings. After discussion and approval from the Engineer the new alignment was staked by TMEE. The change was documented with RFI 001 included in Appendix D.

2.5 Temporary Cofferdam Construction

A temporary earthen cofferdam was constructed in general accordance with the design plans and specifications. MDC removed approximately one foot of unsuitable materials from the footprint of the cofferdam, placing in offroad trucks and hauling to stockpile areas prior to placing cofferdam fill. Heavy rip rap was placed as the core and downstream portion of the cofferdam, overlain with plain rip rap and filter stone (~3” minus rockfill), and covered with geotextile and salvaged granular fill. Fill was salvaged from the existing right embankment at the location shown on the design drawings.

A sample (Sample S-4) of the 3” minus filter/bedding stone was submitted for gradation analysis as a substitute by MDC for the specified MDOT 4AA. The Engineer took no exception to the 3” minus filter/bedding stone. Gradation results are included in Appendix E.

GEI obtained a sample of the salvaged granular fill materials (Sample S-5) and conducted nuclear density testing of the granular fill placed on the crest of the cofferdam. All density tests achieved greater than 95% of the maximum density as determined by the Michigan Cone Method. One test did not initially achieve 95% of the maximum density; however, MDC recompacted the area with the excavator bucket and loader and a retest of the area resulted in a compaction of 97.3% of the maximum density. Density test results are included in Appendix E.

GEI obtained two additional samples (Samples S-6 and S-7) of the stockpiled granular fill materials excavated from the right embankment for gradation analysis for assessment of suitability of use for future construction. Results are included in Appendix E.

2.6 Channel Construction

The horizontal alignment of the channel was adjusted approximately 15’ west as discussed in section 2.4 above. To limit the necessity for excavation within the river tailwater, the specified elevation of the channel outlet was raised from the proposed elevation of 1528.5’ to 1530.0’ resulting in an overall slope of the channel to change from 4.2% to 2.9%. The inlet of the channel was maintained at elevation of 1534.8.’ MDC submitted and GEI reviewed

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 8 and took no exception to RFI 002 to address this issue. RFI 002 is provided in Appendix D.

Excavation for the channel began at the downstream outlet end of the alignment at approximate station 1+75 to approximately 4’ below final grade as depicted on the design drawings. Elevations of the excavation and final grades were checked with MDC’s Topcon laser level and a grade rod. Geotextile fabric was placed, covered with approximately one foot of bedding stone and three feet of heavy rip rap choked with plain rip rap.

Approximately 12’ wide sections were completed prior to progressing upstream. Heavy rip rap was placed on the slopes of the existing dam embankments to a height of at least 8’ above the bottom of the channel. The remaining exposed cut slopes were lined with geotextile and plain rip rap per the design drawings.

The inlet area between 0+00 of the alignment and the cofferdam was approximately fifteen to thirty feet wide and was excavated to approximately three feet below final grade. A one-foot layer of bedding stone was placed over the geotextile fabric and covered with two feet of heavy rip rap choked with plain rip rap. The staging and stockpile areas on the west side of the site were restored with seed, fertilizer, and mulch prior to completing the upstream end of the channel and removal of the temporary cofferdam.

2.7 Cofferdam Removal

Removal of the temporary cofferdam occurred on November 14, 2022. Material removed was hauled to the stockpile area southeast of the gravel parking lot with the offroad dump trucks. Heavy rip rap from the cofferdam was placed to armor the remaining cofferdam end and upstream slope of the portion left in place to be used in future construction. Some of the heavy rip rap was used to armor the left slope of the channel to 8’ above the final grade of the bottom of the channel as called for on the design plans. The removal was performed to elevations as shown on the drawings. The reservoir elevation was at 1533.04’ at time of cofferdam removal which did not allow for immediate flow from the reservoir into the channel.

2.8 Restoration

Seed, fertilizer, and mulch was placed by hand casting the seed and blowing the mulch in areas disturbed by construction and not covered with rip rap. Seed placed included MDOT Roadside Mix as called for in the specifications, and a mixture of winter wheat, annual and perennial rye, and oats.

2.9 Stoplog Installation

With the cofferdam removed, MDC finalized all construction measures including rip rap placement, restoration efforts, and began demobilizing from the site. The DNR-provided timber stoplogs were modified according to the project drawings and installed. Several steel

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 9 logs were salvaged and reused in the left side with timber logs supplementing the previously lost steel logs. The installed stoplogs allowed the reservoir to rise slightly, allowing flow to enter the channel. Only some leakage flow through the stoplogs was observed through the stoplogs and concrete intake structure. The top of the stoplogs were at approximate elevation 1536.4’.

2.10 Demobilization

After completion of the left rip rap slope of the channel and seeding and mulch, MDC began the demobilization process. MDC removed turbidity curtains, wood timber mats, and all equipment, from the site by November 15, 2021.

GEI conducted an as-constructed topographic survey using a Trimble R10 GPS unit to document the actual construction of the channel and slopes. The topographic survey is included on the As-Constructed drawings included in Appendix A.

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 10

3. Summary of Deviations from Plans and Specifications

The work was conducted in general accordance with the plans and specifications and the designs dated September 12, 2022, for the concrete intake structure notch and October 14, 2022, for the channel construction. However, there were a few minor changes to the scope of work as discussed in Section 2. The changes are summarized in the bulleted list below:

• The steel stoplog slots for the new notch were observed to protrude as much as 1” downstream, contrary to the design drawings indication of 1/2” due to thickness variation in the existing concrete wall in order to maintain the critical clear distance of at least 3 ½” between the anchors and the upstream face of the concrete.

• The structural steel slots for the new notch were procured in 304 Stainless Steel in lieu of hot dipped galvanized A36 steel as approved in submittal TCR002.

• The proposed channel design alignment the excavation of the left slope of the channel would interfere with the temporary bridge. The upstream end of the proposed alignment at station 0+00 and the point of intersection (PI) point at station 1+21.7 were shifted approximately 15’ to the west and the outlet point of the channel remained as per the design drawings, after discussion and approval from the Engineer. MDC addressed this change by submitting RFI 001 which is provided in Appendix D.

• The outlet of the channel was raised to prevent excavation within the tailwater, from the proposed elevation of 1528.5’ to 1530.0’ resulting in an overall slope of the channel to change from 4.2% to 2.9% and the inlet of the channel to remain at elevation of 1534.8. To address this issue, MDC submitted RFI 002 which is provided in Appendix D.

• The filter stone and bedding stone was a 3” Minus material, submitted as a replacement for the specified MDOT 4AA material as approved in submittal MDC009. Gradation results are included in Appendix E.

The above modifications were reviewed by the Engineer and Owner and considered to not negatively impact the original design intent of the project.

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 11

4. Quality Control

4.1 Construction Documentation

The Field Engineer was responsible for observation, monitoring, and documentation of the construction work, performing quality control inspections, communicating progress to the Owner and Engineer, and evaluating compliance of the work with the Contract Drawings, and Technical Specifications. Construction documentation was performed by Mr. Bruce Peterson, E.I.T., Mr. Jacob Pieti, P.E., Mr. Patrick Dowling, E.I.T, and Mr. Jacob Burch, E.I.T.

4.1.1 Daily Construction Reports

The Field Engineer prepared a daily construction report for each day of construction when onsite. The reports summarized information of the days’ events and provided documentation for critical construction, existing conditions, and construction progress. The daily field reports provided and prepared by GEI, are included in chronological order in Appendix F.

4.2 Materials Testing

Nuclear density testing, sampling, and laboratory gradation analysis testing of existing soil and submitted filter/bedding stone material completed by GEI. Heavy rip rap and plain rip rap was visually inspected and graded as delivered on site. Complete results of the field and laboratory testing are summarized in Appendix E.

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 12

5. Summary of Submittals and Construction Materials

Prior to mobilizing, TCR provided submittals to GEI, detailing the means, methods, and materials proposed for construction. Approved technical submittals are included in Appendix C. The following submittal list summarizes the primary means, methods, materials, and suppliers utilized by TCR for this project.

• TCR001 – Contractor Work Plan

• TCR002 – Structural Steel Shop Drawings

Prior to mobilizing, MDC provided submittals to GEI, detailing the means, methods, and materials proposed for construction. Approved technical submittals are included in Appendix C. The following submittal list summarizes the primary means, methods, materials, and suppliers utilized by MDC for this project.

• MDC001a – Heavy Rip Rap (RH Huhtala – Old M28 Pit)

• MDC001a – Heavy Rip Rap (MDC – Michigamme Pit)

• MDC002 – Site Safety Program

• MDC003 – Mutual Industries Inc. Silt Fence

• MDC004 – Rhino Erosion King Straw Blanket

• MDC005 – Carthage Mills FX-105HS Geotextile

• MDC006 – Contractor Work Plan

• MDC007 – Curlex Sediment Log

• MDC008 – Plain Rip Rap (MDC – US141 Pit)

• MDC009 – 3” Minus Filter Gravel/Bedding Stone

• MDC010 – AER-FLO Environmental Turbidity Curtain

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C. 13

6. General Qualifications and Certification

The test results submitted in this report represent specific areas tested as indicated in the attached test records. Our field engineering services were performed in general accordance with accepted dam construction engineering practices and procedures as defined in the project plans and specifications dated September 12, 2022, and October 14, 2022. No other warranties or representations, either expressed or implied, are made. A certification letter from GEI (as the Design Engineer) is provided in Appendix G.

Observations of the channel, and stoplog slot remediation, appear to be effective.

The undersigned, a Registered Professional Engineer in Michigan, does hereby certify that he was designated as being in responsible charge of the project Quality Control and that the work was completed in partial accordance with the plans and specifications with exceptions as noted in this report.

GEI Consultants of Michigan, P.C.

Jacob E. Pieti, P.E.

Project Engineer

Michigan Department of Natural Resources January 18, 2023

GEI Consultants of Michigan, P.C.

Appendix A

Record Drawings

PIETI, JAKE B:\Working\DTMB\2201765 Net River Engineering Support Services\00_CAD\Design\Working\01_G-1.0_COVER SHEET.dwg - 12/21/2022

NET RIVER DAM CHANNEL CONSTRUCTION

STATE DAM I.D. NO 131

MICHIGAN DEPARTMENT OF NATURAL RESOURCES

BARAGA COUNTY

COVINGTON, MICHIGAN

THIS DOCUMENT, AND THE IDEAS AND DESIGNS INCORPORATED

HEREIN, IS AN INSTRUMENT OF PROFESSIONAL SERVICE, IS THE

PROPERTY OF GEI CONSULTANTS AND IS NOT TO BE USED, IN WHOLE

OR IN PART, FOR ANY OTHER PROJECT WITHOUT THE WRITTEN

AUTHORIZATION OF GEI CONSULTANTS.

STATE MAP

(NOT TO SCALE)

SITE LOCATION MAP

(NOT TO SCALE)

GEI PROJECT NO. 2201765

SITE

SOURCE:

GOOGLE EARTH IMAGE

NO. DATE ISSUE/REVISION APP

0 10/14/2022 ISSUE FOR CONSTRUCTION GLK

1 12/23/2022 RECORD DRAWINGS GLK

Consultants

PREPARED BY:

GEI CONSULTANTS OF MICHIGAN, P.C.

109 W. BARAGA AVENUE

MARQUETTE, MI 49855

(906)451-4021

DWG. NO.

SHEET NO.

G-1.0

SITE

PREPARED FOR:

MICHIGAN DEPARTMENT OF NATURAL

RESOURCES

427 US-41 NORTH

BARAGA, MI 49908

(906) 353-6651

SHEET INDEX

SHEET NO. DRAWING NO. SHEET TITLE

G-1.0 1 OF 15 COVER SHEET

G-2.0 2 OF 15 GENERAL NOTES AND LEGEND

C-1.0 3 OF 15 EXISTING CONDITIONS

C-2.0 4 OF 15 SESC PLAN

C-3.0 5 OF 15 COFFERDAM PLAN

C-4.0 6 OF 15 COFFERDAM PROFILE

C-5.0 7 OF 15 EXCAVATION PLAN

C-6.0 8 OF 15 CHANNEL PLAN

C-7.0 9 OF 15 CHANNEL PROFILE

C-8.0 10 OF 15 COFFERDAM REMOVAL AND SITE

STABILIZATION PLAN

C-9.0 11 OF 15 COFFERDAM REMOVAL PROFILE

T-1.0 12 OF 15 TECHNICAL SPECIFICATIONS 1 OF 2

T-2.0 13 OF 15 TECHNICAL SPECIFICATIONS 2 OF 2

D-01 14 OF 15 CONCRETE NOTCH AT NORTH WALL -

DEMOLITION

S-01 15 OF 15 STOP LOG DETAILS

AS-CONSTRUCTED NOTES:

1. REFERENCE THE FINAL CONSTRUCTION REPORT FOR FULL

DESCRIPTION OF ACTIVITIES PERFORMED AND ALL RECORD

DOCUMENTS.

PI

ET

I, JA

KE

B

:\W or ki ng

\D

TM

B\

N et R iv er

E ng in ee rin g

Su pp or t S er vi ce s\

_C

AD

\D es ig n\ W or ki ng \0

2_ G

-2 .0

_G

EN

ER

AL

N O

TE

S

AN

D

L

EG

EN

D

.d w g

2/

/2

MICHIGAN

DEPARTMENT OF

NATURAL

RESOURCES

427 US-41 NORTH

BARAGA, MI 49908

(906) 353-6651

GEI CONSULTANTS OF MICHIGAN, P.C.

109 W. BARAGA AVENUE

MARQUETTE, MI 49855

(906)451-4021

Consultants

NO DATE ISSUE/REVISION APP

0 10/14/2022 ISSUE FOR CONSTRUCTION GLK

1 12/23/2022 RECORD DRAWINGS GLK

SHEET NAME DWG. NO.

NET RIVER DAM

CHANNEL CONSTRUCTION

BARAGA COUNTY, MI

SHEET NO.

GENERAL NOTES AND

LEGEND

G-2.0

If this scale bar does not measure 1" then drawing is not original scale.

Attention:

0 1"

DRAFT

Designed:

Checked:

Drawn:

P.E. No:

GEI Project

JEP

KAR

AKG

Approved: GLK

48098

2201765

STRUCTURAL

CONCRETE

APPROX = APPROXIMATE

BIT = BITUMINOUS

BOT = BOTTOM

CIP = CAST IN PLACE

CL = CENTERLINE

CLR = CLEAR

CMP = CORRUGATED METAL PIPE

CNTR = CENTER

CONC = CONCRETE

DIA, Ø = DIAMETER

DIM = DIMENSION(S)

D/S = DOWNSTREAM

DWG, DWGS = DRAWING OR DRAWINGS

EA = EACH

EL., ELEV = ELEVATION

EW = EACH WAY

FT = FEET OR FOOT

GALV = GALVANIZED

GR = GRADE

HSS = HOLLOW STRUCTURAL STEEL

LOC = LIMITS OF CONSTRUCTION

MAX = MAXIMUM

MDOT = MICHIGAN DEPARTMENT OF

TRANSPORTATION

MIN = MINIMUM

NO = NUMBER

NTS = NOT TO SCALE

O.C. = ON CENTER

O.D. = OUTSIDE DIAMETER

PL = PLATE

RA = RADIUS

REINF = REINFORCEMENT

REQ'D = REQUIRED

SPEC = SPECIFICATION(S)

TYP = TYPICAL

U.N.O. = UNLESS NOTED OTHERWISE

U/S = UPSTREAM

VERT = VERTICAL

VIF = VERIFY IN FIELD

ABBREVIATIONS:

HATCH LEGEND:

GENERAL LEGEND:

A S-01

A S-01

SECTION LOCATION. THE LETTER "A" REFERS TO THE SECTION

DESIGNATION. THE NUMBER "S-01" REFERS TO THE DRAWING NUMBER

WHERE THE SECTION IS SHOWN.

S-01

DETAIL LOCATION. THE NUMBER "1" REFERS TO THE DETAIL

DESIGNATION. THE NUMBER "S-01" REFERS TO THE DRAWING NUMBER

WHERE THE DETAIL IS SHOWN.

SCALE: N.T.S.

DETAIL - XXXX1

S-01

SCALE: N.T.S.

SECTION - XXXXA

S-01

DETAIL TITLE. THE NUMBER "1" REFERS TO THE DETAIL DESIGNATION.

THE NUMBER "S-01" REFERS TO THE DRAWING NUMBER WHERE THE

DETAIL IS CALLED OUT.

SECTION TITLE. THE LETTER "A" REFERS TO THE DETAIL

DESIGNATION. THE NUMBER "S-01" REFERS TO THE DRAWING

NUMBER WHERE THE DETAIL IS CALLED OUT.

EXISTING GROUND

SURFACE

VERTICAL DATUM:

NORTH AMERICAN VERTICAL DATUM OF 1988 (NAVD88)

HORIZONTAL DATUM:

NORTH AMERICAN DATUM 1983 (NAD83), MICHIGAN SOUTH ZONE, INTERNATIONAL FOOT

GENERAL NOTES:

1. THESE NOTES SUPPLEMENT THE PROJECT SPECIFICATIONS. BEFORE BEGINNING CONSTRUCTION, THE CONTRACTOR SHALL VERIFY ALL CRITICAL DIMENSIONS, LOCATIONS, AND ELEVATIONS

BEFORE PROCEEDING WITH WORK. ANY DISCREPANCY FOUND AMONG THE DRAWINGS,

SPECIFICATIONS, THESE NOTES, AND THE SITE CONDITIONS SHALL BE REPORTED TO THE

OWNER'S REPRESENTATIVE (GEI), WHO SHALL CORRECT SUCH DISCREPANCY IN WRITING. ANY

WORK DONE BY THE CONTRACTOR AFTER DISCOVERY OF SUCH DISCREPANCY SHALL BE DONE AT

CONTRACTOR'S RISK.

2. CONSTRUCTION IS SUBJECT TO THE RULES AND REGULATIONS OF THE MICHIGAN DEPARTMENT OF

THE ENVIRONMENT, GREAT LAKES, AND ENERGY (EGLE). SUBSTANTIVE CHANGES TO THE

APPROVED DRAWINGS AND SPECIFICATIONS MAY REQUIRE EGLE APPROVAL.

3. THE SUBSURFACE UTILITY INFORMATION IN THESE DRAWINGS SHALL BE ASSUMED TO BE

APPROXIMATE. THE CONTRACTOR SHALL MAKE ANY NECESSARY INVESTIGATIONS AND

COORDINATION WITH THE 811 MISS-DIG ONE CALL PRIOR TO COMMENCEMENT OF ANY WORK

ACTIVITIES.

4. TEMPORARY STAGING, STORAGE, STOCKPILE AND ACCESS AREAS SHALL BE WITHIN WORK LIMITS

AND RESTORED BY THE CONTRACTOR TO ORIGINAL CONDITION. ALL RESTORATION OF GRASSED

AREAS SHALL BE WITH SEED AND MULCH.

5. THE EXISTING TOPOGRAPHY HEREIN IS FOR INFORMATIONAL PURPOSES ONLY. THE ENGINEER

AND OWNER IS NOT RESPONSIBLE FOR ANY MISCHARTED OR UNCHARTED UTILITIES, OR OTHER

ERRORS DETECTED. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY ALL SITE

CONDITIONS.

6. EXISTING CONDITIONS SHOWN ON THE DRAWINGS ARE APPROXIMATE, ACTUAL FIELD CONDITIONS

MAY VARY. REFER TO REFERENCE DRAWINGS AND SPECIFICATIONS FOR ADDITIONAL

INFORMATION REGARDING EXISTING CONDITIONS.

7. RESERVOIR LEVEL VARIES. INDICATIONS OF WATER LEVELS SHOWN ON THE DRAWINGS MAY NOT

BE REPRESENTATIVE OF ACTUAL WATER LEVELS THAT MAY BE ENCOUNTERED DURING

PERFORMANCE OF WORK BY THE CONTRACTOR.

8. CONTRACTOR SHALL PROVIDE APPLICABLE SIGNAGE AND TEMPORARY RESTRICT PUBLIC ACCESS

TO THE WORK AREAS.

COORDINATION:

1. SCHEDULE, COORDINATE, AND PERFORM THE WORK TO MEET THE OVERALL PROJECT SCHEDULE

CONSTRAINTS.

2. COORDINATE WITH THE OWNER FOR DESIGNATION OF SPECIFIC WORK AREAS FOR RESTRICTED

ACCESS DURING PARTICULAR PERIODS OF THE WORK, AS WELL AS NEED FOR FENCING, SIGNAGE, AND OTHER MEASURES NECESSARY TO PROTECT THE PUBLIC, COMPLETED WORK, WORK IN

PROGRESS, AND CONTRACTOR'S EQUIPMENT AND PROPERTY ON SITE.

3. MAINTAIN FULL AND COMPLETE ACCESS TO WORK TO OWNER, ENGINEER, AND REGULATORY

PERSONNEL.

PERMITTING AND ENVIRONMENTAL:

COMPLY WITH ALL REQUIREMENTS OF OWNER-OBTAINED PROJECT PERMITS. CONTRACTOR SHALL

OBTAIN THE PART 91 SESC PERMIT FROM BARAGA COUNTY.

PROJECT WORKS AUTHORIZED UNDER REQUIREMENTS OF EGLE JPA WRP035090

STEWARDSHIP / ARTIFACT NOTE:

IF ANY ARTIFACTS ARE DISCOVERED DURING THE CONSTRUCTION PROCESS, ALL WORK IS TO

STOP AND THE OWNER'S REPRESENTATIVE / PROJECT MANAGER SHALL BE NOTIFIED.

ARTIFACTS OR ARCHEOLOGICAL MATERIALS ARE DEFINED AS : ABORIGINAL ANTIQUITIES AND

OTHER RECORDS ON ANTIQUITY, INCLUDING MOUNDS, MINES, EARTHWORKS, VILLAGE SITES,

CAMP SITES, BURIALS, HUMAN OR OTHER BONES, SHELLS, STONE IMPLEMENTS, BONE OR

COPPER IMPLEMENTS, POTTERY OR SHARD OF POTTER, OR OTHER OBJECTS RELATING TO

NATIVE AMERICAN OCCUPATION; AND MODERN ARTIFACTS, SUCH AS FORTS, RELICS, AND

OTHER ARTIFACTS RELATING TO THE HISTORIC, COLONIAL, TERRITORIAL AND EARLY

STATEHOOD PERIODS.

EXISTING DATA SOURCES:

1. EXISTING BASEMAP COMPILED FROM AERIAL IMAGERY OBTAINED FROM GOOGLE EARTH

(2022) AND OVERLAID BY THE RESULTS OF A SITE SURVEY CONDUCTED JULY 27, 2022 BY

GEI CONSULTANTS. A TRIMBLE R6 GNSS SYSTEM GPS WAS USED FOR THE DATA

COLLECTION. THIS WAS OVERLAIN BY THE RESULTS OF A BATHYMETRIC SURVEY

PERFORMED BY TRIMEDIA ENVIRONMENTAL & ENGINEERING ON SEPTEMBER 1, 2022.

2. GEOTECHNICAL EXPLORATION CONDUCTED BY GEI IN JULY, 2022. LABORATORY TEST

RESULTS ARE AVAILABLE UPON REQUEST.

WETLAND

EXCAVATION

GRANULAR

FILL

MDOT HEAVY

RIP RAP

LINETYPE LEGEND:

ALIGNMENTS

EXISTING GROUND

TOPO (MAJOR)

TOPO (MINOR)

TREELINE

DESIGN GRADE

WATERLINE

MDOT PLAIN

RIP RAP

HISTORICAL REFERENCE DRAWINGS

SHEET NO. SHEET TITLE SHEET DATE

16286-1 COVER SHEET 9/16/1988

16286-2 EXISTING SITE CONDITIONS 9/16/1988

16286-3 PROPOSED DAM CONTOURS 11/2/1988

16286-4 TYPICAL DESIGN CROSS-SECTIONS 11/2/1988

16286-5 EARTHWORK CROSS-SECTIONS 11/2/1988

16286-6 SPILLWAY TRASH RACK DESIGN 7/6/1989

16286-7 TRASH RACK DETAILS 7/18/1989

16286-8 OVERLAND FLOW CENTERLINE

PROFILE 5/8/1989

16286-9 OVERLAND PLAN SITE TOPOGRAPHY 5/8/1989

16286-10 OVERLAND FLOW CROSS-SECTIONS 11/21/1988

16286-11 DOWNSTREAM CROSS-SECTIONS 11/21/1988

16286-12 DAM CROSS-SECTIONS 12/2/1988

1 OF 3 WETLAND MITIGATION PLAN AND

CONSTRUCTION SEQUENCE 3/2/1990

2 OF 3 ENLARGEMENT I: EAST BAY AREA AND

DETAILS 3/2/1990

3 OF 3 ENLARGEMENT II: SOUTH BAY AREA

AND DETAILS 3/2/1990

FILTER

GRAVEL

BEDDING STONE

TIMBER MATTING

OH

W

OHW

OHW

OHW

OH

W

OHW

OHW OHW OHW

OHW

OH

W

OHW

OHW

OHW

OHW

OH

W

OHW

CP-1

CP-2

CP-3

CONTROL POINT

LOCATION DATA

POINT #

CP-1

CP-2

CP-3

NORTHING

603699.4880

603705.4260

603712.6310

EASTING

25864922.4000

25864638.6600

25865135.3200

ELEVATION

1546.37

1545.88

1547.67

IEWET

WET

WET

W

ET

WET

WET

WET

WET

W

ET

WET

WET

W

ET

WET W

ET

WETWET

W

ET

W

ET

W

ET

W

ET

WET

WET

WET

WET

WET

WET

W

ET

WET

W

ET

WET

WET

WET

WET

WET

WET

WET

WET

WET

W

ET

W

ET

WET

WET

WET

WET

WET

WET

153015

301530

PI

ET

I, JA

KE

B

:\W or ki ng

\D

TM

B\

N et R iv er

E ng in ee rin g

Su pp or t S er vi ce s\

_C

AD

\D es ig n\ W or ki ng \0

3_ C

-1 .0

_E

XI

ST

IN

G C

O N

D

IT

IO

N

S.

dw g

2/

/2

MICHIGAN

DEPARTMENT OF

NATURAL

RESOURCES

427 US-41 NORTH

BARAGA, MI 49908

(906) 353-6651

GEI CONSULTANTS OF MICHIGAN, P.C.

109 W. BARAGA AVENUE

MARQUETTE, MI 49855

(906)451-4021

Consultants

NO DATE ISSUE/REVISION APP

0 10/14/2022 ISSUE FOR CONSTRUCTION GLK

1 12/23/2022 RECORD DRAWINGS GLK

SHEET NAME DWG. NO.

NET RIVER DAM

CHANNEL CONSTRUCTION

BARAGA COUNTY, MI

SHEET NO.

EXISTING CONDITIONS

C-1.0

EXISTING CONDITIONS

PLAN

SCALE, FEET

40 80

If this scale bar does not measure 1" then drawing is not original scale.

Attention:

0 1"

DRAFT

Designed:

Checked:

Drawn:

P.E. No:

GEI Project

JEP

KAR

AKG

Approved: GLK

48098

2201765

APPROXIMATE WATERLINE

ELEV. 1536.0 SURVEYED

7/27/2022

CONCRETE BOAT

LAUNCH RAMP

TREE LINE

APPROXIMATE WATERLINE

ELEV. 1530.0 SURVEYED

7/27/2022

NET RIVER FLOODING

N

ET R

IVER

NET RIVER DAM ROAD

GRAVEL PARKING LOT

RESTROOM

CONCRETE INTAKE

STRUCTURE

PARTIALLY

CRUSHED 72" Ø

CMP CULVERT

72" Ø CMP

CULVERT

CONCRETE OUTLET

STRUCTURE

APPROXIMATE WATERLINE

ELEV. 1533.5 SURVEYED

9/1/2022

(0.9 M

ILES TO US 141)

HISTORICAL OHWM

ELEV. 1543.2

FL

O

W

NOTES:

1. CONTROL POINTS CONSIST OF DRIVEN REBAR

POINT WITH CAP.

2. CONTRACTOR SHALL RELOCATE CONTROL

POINTS CP-2 AND CP-3 TO AREA OUTSIDE

DISTURBANCE TO FACILITATE PROJECT WORK.

SURVEY RELOCATED LOCATIONS AND PROVIDE

TO ENGINEER.

AS-CONSTRUCTED NOTES:

1. CP-2 AND CP-3 WERE REMOVED AND REPLACED

WITH CP-105 AND CP-106.

4"Ø PVC DRAIN OUTLET

CP-105

CP-106

CP-105 603662.400

0 25864955.2000 1546.5000

CP-106 603691.800

0 25864799.4000 1544.6000

OHW

OHW

OHW

OH

W

OHW

OHW OHW OHW

OHW

OH

W

OHW

OHW

OHW

CP-1

CP-2

CP-3

IEWET

WET

WET

W

ET

WET

WET

WET

WET

W

ET

WET

WET

W

ET

WET W

ET

WETWET

W

ET

W

ET

W

ET

W

ET

WET

WET

WET

WET

WET

WET

W

ET

WET

W

ET

WET

WET

WET

WET

WET

WET

WET

WET

WET

W

ET

W

ET

WET

WET

WET

WET

WET

WET

TC

TC

TC

SF SF

SF

SF

SF

SF SF SF

SF

SF

SF

SF

SF

SF

SF

SF

SF

SF

SF

SF

SF

SF

SF

NOTES:

1. MAINTAIN AT LEAST 12" OF CLEARANCE BETWEEN BOTTOM

OF CURTAIN AND SEDIMENT.

2. REEFING LINES ARE REQUIRED TO BE INSTALLED AND

USED TO SHORTEN CURTAIN DURING PERIODS OF LOW

WATER LEVELS.

FLOTATION SEGMENT ATTACH LINES TO SHACKLE

BOTTOM OF

WATER BODY

FLOTATION DEVICES (BUOY).

LIGHTED BOUYS REQUIRED

AT 100' INTERVALS.

FILTER CLOTH SKIRT

(DEPTH VARIES)

STREAM ANCHOR

UNIVERSAL CONNECTOR

TOP TENSION CABLE

FLOATATION SEGMENT FOLD JOINT

FOR STORAGE

TOP LOAD LINE

SKIRT CONNECT GROMMETS

PROFILE

ANCHOR LINES

TURBID WATER CLEAR WATER

SECTION

DISTURBED GROUND/

WORK ZONE

SHORE ANCHOR (TYP) SHORELINE

TURBIDITY CURTAIN

50'-100'

(TYP)

INSTALLATION

CHANNEL ANCHOR

TURBIDITY CURTAIN

SCALE: NTS

INSTALLATION WITH TRENCHING

NOTES:

1. SILT FENCE SHALL BE PLACED ON SLOPE CONTOURS TO MAXIMIZE PONDING EFFICIENCY.

2. INSPECT AND REPAIR FENCE AFTER EACH STORM EVENT AND REMOVE SEDIMENT WHEN

NECESSARY. 9" (225mm) MAXIMUM RECOMMENDED STORAGE HEIGHT.

3. REMOVED SEDIMENT SHALL BE DEPOSITED TO AN AREA THAT WILL NOT CONTRIBUTE

SEDIMENT OFF-SITE AND CAN BE PERMANENTLY STABILIZED.

EXTRA STRENGTH FILTER

FABRIC NEEDED WITHOUT

WIRE MESH SUPPORT

STEEL OR WOOD POST

ATTACH FILTER FABRIC

SECURELY TO UPSTREAM

SIDE OF POST

10' (3m) MAXIMUM SPACING WITH WIRE SUPPORT FENCE 6' (1.8m)

MAXIMUM SPACING WITHOUT

WIRE SUPPORT FENCE

FLOW

PONDING HEIGHT

8" (200 mm)

3/4" (20mm) MIN

DRAIN ROCK

FLOW

12" MIN

(300 MM)

9" MAX

(225 mm)

STORAGE HT

PONDING HEIGHT

FLOW

INSTALLATION WITHOUT TRENCHING

STEEL OR WOOD

POST

36" (1M) HIGH MAX

12" MIN

(300 mm)

4"x6" (100x150mm)

TRENCH WITH

COMPACTED BACKFILL

SILT FENCE

SCALE: NTS

1"x1"x24"

WOOD STAKE

COMPACT EXCAVATED

SOIL ON BERM

CREST SIDE

SET WATTLE ROLL IN

2" - 3" DEEP TRENCH

12" (MIN)

INSTALL STAKE

PERPENDICULAR

TO SLOPE FACE

2" -3

STRAW WATTLE STAKE

SCALE: NTS

PI

ET

I, JA

KE

B

:\W or ki ng

\D

TM

B\

N et R iv er

E ng in ee rin g

Su pp or t S er vi ce s\

_C

AD

\D es ig n\ W or ki ng \0

4_ C

-2 .0

_S

ES

C P

LA

N

.d w g

2/

/2

MICHIGAN

DEPARTMENT OF

NATURAL

RESOURCES

427 US-41 NORTH

BARAGA, MI 49908

(906) 353-6651

GEI CONSULTANTS OF MICHIGAN, P.C.

109 W. BARAGA AVENUE

MARQUETTE, MI 49855

(906)451-4021

Consultants

NO DATE ISSUE/REVISION APP

0 10/14/2022 ISSUE FOR CONSTRUCTION GLK

1 12/23/2022 RECORD DRAWINGS GLK

SHEET NAME DWG. NO.

NET RIVER DAM

CHANNEL CONSTRUCTION

BARAGA COUNTY, MI

SHEET NO.

SESC PLAN

C-2.0

If this scale bar does not measure 1" then drawing is not original scale.

Attention:

0 1"

Designed:

Checked:

Drawn:

P.E. No:

GEI Project

JEP

KAR

AKG

Approved: GLK

48098

2201765

TURBIDITY CURTAIN (TYP)

NET RIVER FLOODING

N

ET R

IVER

SESC

PLAN

SCALE, FEET

40 80

NOTES:

1. INSTALL BALES AS SHOWN. IF ADDITIONAL STORAGE VOLUME IS NECESSARY, SECURE

ADDITIONAL BALES ON TOP OF INITIAL BOTTOM LAYER AND/OR BY INCREASING THE

NUMBER BALES IN BOTTOM LAYER.

2. SECURE EACH BALE & EACH LAYER OF BALES USING EITHER TWO REBARS OR TWO

WOODEN STAKES PER BALE.

3. LINE TRAP WITH GEOTEXTILE FABRIC AND SECURE OVER HAY BALES USING STAKES.

4. THE SEDIMENT TRAP WILL NOT BE GREATER THAN TWO BALES IN HEIGHT FOR SIX-BALE

BOTTOM CONSTRUCTION WITHOUT ADDITIONAL REINFORCEMENT OF TRAP WALLS.

5. CONSTRUCT DEWATERING STRUCTURE TO ACCOMODATE ANTICIPATED PUMPING RATES:

EXAMPLE PUMPING RATE = 200 G.P.M.

STORAGE VOLUME (C.F.) = 16 x 200 G.P.M. = 3,200 C.F.

HEIGHT OF STRAW BALES STRUCTURE = 3 FEET (2 BALES STACKED)

INSIDE DIMENSIONS OF STRUCTURE = 33 x 33 FEET SQUARE

6. SEDIMENT TRAP DEWATERING DEVICE CANNOT BE USED IN A WETLAND.

6 INCH MIN.

PLAN VIEW

SECTION A-A

LINE TRAP WITH

GEOTEXTILE

FABRIC, SEE

NOTE 4

CLAMPS

FILTER BAG

WELL VEGETATED, GRASSY AREA

WELL VEGETATED, GRASSY AREA

FILTER BAG

HEAVY DUTY LIFTING STRAPS

(RECOMMENDED)

PLAN VIEW

ELEVATION VIEW

NOTES:

1. LOW VOLUME FILTER BAGS SHALL BE MADE FROM NON-WOVEN GEOTEXTILE MATERIAL SEWN WITH HIGH STRENGTH, DOUBLE STITCHED "J" TYPE SEAMS. THEY SHALL BE CAPABLE OF TRAPPING PARTICLES LARGER THAN 150 MICRONS.

FILTER BAGS SHALL BE PROPERLY SIZED; REFER TO THE MANUFACTURER SPECIFICATIONS TO DETERMINE APPROPRIATE

SIZE.

2. A SUITABLE MEANS OF ACCESSING THE BAG WITH MACHINERY REQUIRED FOR DISPOSAL PURPOSES SHALL BE PROVIDED.

FILTER BAGS SHALL BE REPLACED WHEN THEY BECOME 1/2 FULL OF SEDIMENT. SPARE BAGS SHALL BE KEPT AVAILABLE FOR REPLACEMENT OF THOSE THAT HAVE FAILED OR ARE FILLED. BAGS SHALL BE PLACED ON STRAPS TO FACILITATE

REMOVAL UNLESS BAGS COME WITH LIFTING STRAPS ALREADY ATTACHED.

3. BAGS SHALL BE LOCATED IN WELL-VEGETATED (GRASSY) AREA, AND DISCHARGE ONTO STABLE, EROSION RESISTANT AREAS. WHERE THIS IS NOT POSSIBLE, A GEOTEXTILE UNDERLAYMENT AND FLOW PATH OR SECONDARY CONTAINMENT SHALL BE PROVIDED. BAGS MAY BE PLACED ON FILTER STONE TO INCREASE DISCHARGE CAPACITY. BAGS SHALL NOT BE PLACED ON SLOPES GREATER THAN 5%. FOR SLOPES EXCEEDING 5%, CLEAN ROCK OR OTHER NON-ERODIBLE AND

NON-POLLUTING MATERIAL MAY BE PLACED UNDER THE BAG TO REDUCE SLOPE STEEPNESS.

4. NO DOWNSLOPE SEDIMENT BARRIER IS REQUIRED FOR MOST INSTALLATIONS. COMPOST BERM OR COMPOST FILTER SOCK SHALL BE INSTALLED BELOW BAGS LOCATED IN HQ OR EV WATERSHEDS, WITHIN 50 FEET OF ANY RECEIVING

SURFACE WATER OR WHERE GRASSY AREA IS NOT AVAILABLE.

5. THE PUMP DISCHARGE HOSE SHALL BE INSERTED INTO THE BAGS IN THE MANNER SPECIFIED BY THE MANUFACTURER

AND SECURELY CLAMPED. A PIECE OF PVC PIPE IS RECOMMENDED FOR THIS PURPOSE.

6. THE PUMPING RATE SHALL BE NO GREATER THAN 750 GPM OR 1/2 THE MAXIMUM SPECIFIED BY THE MANUFACTURER, WHICHEVER IS LESS. PUMP INTAKES SHALL BE FLOATING AND SCREENED.

7. FILTER BAGS SHALL BE INSPECTED DAILY. IF ANY PROBLEM IS DETECTED, PUMPING SHALL CEASE IMMEDIATELY AND NOT

RESUME UNTIL THE PROBLEM IS CORRECTED.

8. FILTER BAGS MAY BE PLACED IN WETLANDS IF UPLAND DISCHARGE LOCATIONS ARE NOT LOCATED WITHIN A SUITABLE

DISTANCE

DISCHARGE HOSE

INTAKE HOSEPUMP

CLAMPS

PUMP

INTAKE HOSE

DISCHARGE HOSE

POTENTIAL STOCKPILE AREA

SILT FENCE (TYP)

AS-CONSTRUCTED NOTES:

1. TURBIDITY CURTAIN REMOVED AT CONSTRUCTION COMPLETION ON 11/15/22. SILT FENCE

REMAINED IN PLACE TO PROTECT SLOPES UNTIL VEGETATION IS REESTABLISHED.

OHW

OHW

OH

W

OHW

OHW

OHW

OHW OHW

OHW

OHW OHW OHW

OHW

CP-2

IE

WET

WET

WET

WET

W

ET

WET

W

ET

W

ET

WET WET

WET

WET

WET

WET

WET

WET

W

ET

WET

WET

WET W

ET

WET

WET WET

W

ET

WET

WET

WET

WET

WET

W

ET

W

ET

WET

W

ET

W

ET

WET

WET

WET

WET

WET

WET

WET

WET

WET

WET

WET

WET

WET

WET

WET

WET

W

ET

W

ET

W

ET

W

ET

WET

WET

WET

WET

WET

TC TC TC

TC

TC

TC

TC

TC

SF

SF

SF

SF

SFSF

SF

SF

SF

SF

SF

SF

SF

SF

SF SF

SFSF

1+00

PC: 0+88.55

PT: 1+83.70

0+00

1+96.56

APPROXIMATE CREST

REMOVAL LIMITS

(SEE NOTE 1)

X X

X

PI

ET

I, JA

KE

B

:\W or ki ng

\D

TM

B\

N et R iv er

E ng in ee rin g

Su pp or t S er vi ce s\

_C

AD

\D es ig n\ W or ki ng \0

5_ C

-3 .0

_C O

FF

ER

D

AM

P

LA

N .d w g

2/

/2

MICHIGAN

DEPARTMENT OF

NATURAL

RESOURCES

427 US-41 NORTH

BARAGA, MI 49908

(906) 353-6651

GEI CONSULTANTS OF MICHIGAN, P.C.

109 W. BARAGA AVENUE

MARQUETTE, MI 49855

(906)451-4021

Consultants

NO DATE ISSUE/REVISION APP

0 10/14/2022 ISSUE FOR CONSTRUCTION GLK

1 12/23/2022 RECORD DRAWINGS GLK

SHEET NAME DWG. NO.

NET RIVER DAM

CHANNEL CONSTRUCTION

BARAGA COUNTY, MI

SHEET NO.

COFFERDAM PLAN

C-3.0

If this scale bar does not measure 1" then drawing is not original scale.

Attention:

0 1"

DRAFT

Designed:

Checked:

Drawn:

P.E. No:

GEI Project

JEP

KAR

AKG

Approved: GLK

48098

2201765

COFFERDAM

PLAN

SCALE, FEET

20 40

COFFERDAM

TEMPORARY BRIDGE

C-3.0

TEMPORARY BRIDGE

TYPICAL PLAN

SCALE: 1" = 10'

C-3.0

TEMPORARY BRIDGE

TYPICAL SECTION

SCALE: 1" = 10'

B

C-3.0

40' MIN

TEMPORARY BRIDGE

TIMBER MATTING

PARTIALLY CRUSHED

72" Ø CMP CULVERT

72" Ø CMP CULVERT

TEMPORARY

BRIDGE

TIMBER MATTING

BRIDGE SHALL NOT CONTACT

GROUND SURFACE

EMBANKMENT CREST

COFFERDAM

TYPICAL ROCK CORE SECTION

SCALE: 1" = 10'

A

C-3.0

6'

3H 1V

GRANULAR FILL

EXISTING

SURFACE

VARIES

COFFERDAM CREST

EL 1538.0'

FILTER GRAVEL 12"

THICK MIN

HEAVY RIP RAP

10'

TOP OF HEAVY RIP RAP

EL 1536.0'

ANTICIPATED CONSTRUCTION SEQUENCE:

1. INSTALL SESC MEASURES

2. INSTALL TEMPORARY BRIDGE

3. CLEAR RIGHT ABUTMENT AND CONSTRUCT

TEMPORARY ACCESS ROAD

4. BEGIN CONSTRUCTING COFFERDAM

2H

1V2-YEAR FLOOD ELEV. 1536.4'

9/1/22 WATER ELEV. 1533.5'

B C-3.0

B C-3.0

A C-3.0

A C-3.0

GEOTEXTILE FABRIC

NOTES:

1. EXISTING EMBANKMENT CREST WITHIN LIMITS OF

PROPOSED CHANNEL CUT MAY BE EXCAVATED TO NO

LOWER THAN ELEVATION 1539.0 FT PRIOR TO

COMPLETION OF COFFERDAM. THIS IS INTENDED TO

ALLOW FOR PLACEMENT OF GRANULAR FILL SOURCED

FROM EXISTING EMBANKMENT MATERIALS.

1. VERTICAL PROFILE SHOWN ON SHEET C-4.0.

6' C

O

FF

ER

D

AM

AL

IG

N

M

EN

T

COFFERDAM CREST ALIGNMENT1

STATION NORTHING (FT) EASTING (FT) ELEVATION (FT)

0+00 603794.05 25864536.45 1538.00

0+88.55 603794.05 25864625.00 1538.00

CURVE DESIGN DATA: R = 61.63 FT, L = 95.15 FT

1+83.70 603734.07 25864686.61 1538.00 1+96.56 603721.22 25864686.96 1538.00

AS-CONSTRUCTED NOTES:

1. COFFERDAM REMOVED PER C-8.0 AND C-9.0.

CL LEFT CMP CULVERT

CL TEMPORARY BRIDGE

2.4' file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt file:///G:/Blocks/GEI%20General/D_GEI-Section-Mark-FULL_Help.txt…