Boardman_Final_RTA_Specs_9_28_2016_.pdf

SPECIFICATION COVER SHEET

PLANS & SPECIFICATIONS

FOR

: FY16 Boardman Dam Removal and River Restoration

TRAVERSE CITY, MI

READY TO ADVERTISE – 27SEPT2016

U.S. ARMY CORPS OF ENGINEERS

DETROIT DISTRICT

Boardman Dam Removal and River Restoration

PROJECT TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 10 10 REAL ESTATE

01 11 00 SUMMARY OF WORK

01 29 01 MEASUREMENT AND PAYMENT

01 32 01.00 10 PROJECT SCHEDULE

01 32 33 PHOTOGRAPHIC DOCUMENTATION

01 33 00 SUBMITTAL PROCEDURES

01 35 00 SPECIAL PROJECT PROCEDURES

01 35 26 GOVERNMENTAL SAFETY REQUIREMENTS

01 41 00 REGULATORY REQUIREMENTS

01 42 00 REFERENCES

01 45 00.00 10 QUALITY CONTROL

01 45 00.10 10 QUALITY CONTROL SYSTEM (QCS)

01 50 00 CONSTRUCTION FACILITIES AND TEMPORARY CONTROLS

01 57 20.00 20 ENVIRONMENTAL PROTECTION

01 58 00 CONSTRUCTION PROJECTS AND SAFETY PERFORMANCE SIGNS

01 60 00 PRODUCT REQUIREMENTS

01 71 23 FIELD ENGINEERING

01 78 00 CLOSEOUT SUBMITTALS

01 99 90 LISTING OF ENCLOSED DOCUMENTS, EXHIBITS AND OTHER

ATTACHMENTS (AMENDMENT 0002)

DIVISION 02 - EXISTING CONDITIONS

02 01 00 MAINTENANCE OF EXISTING CONDITIONS

02 05 00 SITE PREPARATION

02 30 00 GEOTECHNICAL DATA

02 41 16 STRUCTURE DEMOLITION

02 42 09 WASTE REMOVAL AND HANDLING

DIVISION 31 - EARTHWORK

31 10 00 CLEARING

31 20 40 SITE RESTORATION

31 23 00 EARTHWORK

31 23 19 DEWATERING

31 36 00 STREAMBANK CONSTRUCTION

31 37 00 STREAMBED CONSTRUCTION

31 39 00 LARGE WOOD

31 40 00 SLOPE PROTECTION AND EROSION CONTROL

31 70 00 ARTICULATED BLOCK

31 71 00 AUXILIARY SPILLWAY STILLING BASIN

31 72 00 SIPHON OUTLET ENERGY DISSIPATION

31 73 00 BRIDGE RIPRAP HEAVY MODIFIED

DIVISION 32 - EXTERIOR IMPROVEMENTS

32 12 16 CASS ROAD SPECIFICATION

32 50 00 MAINTAINING TRAFFIC, PERMANENT SIGNING AND PAVEMENT

MARKING

32 60 00 RIVER SIGNAGE

32 90 00 PLANTING

DIVISION 33 - UTILITIES

33 46 16 TEMPORARY SIPHON DEWATERING SYSTEM

PROJECT TABLE OF CONTENTS Page 1

-- End of Project Table of Contents --

PROJECT TABLE OF CONTENTS Page 2

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 10 10

REAL ESTATE

PART 1 GENERAL

1.1 SUBMITTALS

1.2 REGULATORY REQUIREMENTS

1.2.1 Real Estate Rights

1.2.2 Additional Real Estate Rights

1.3 PROJECT/SITE CONDITIONS

1.3.1 Location and Verification

1.3.2 Survey Markers

1.3.2.1 Semipermanent Markers

1.3.2.2 Temporary Markers

PART 2 PRODUCTS (NOT APPLICABLE)

PART 3 EXECUTION (NOT APPLICABLE)

-- End of Section Table of Contents --

SECTION 01 10 10 Page 1

SECTION 01 10 10

REAL ESTATE

PART 1 GENERAL

1.1 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only or as otherwise designated. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with Section

01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Additional Property Agreements; G-RED.

Copies of any agreements for Contractor-acquired real estate rights for this project shall be furnished before entering thereon.

Certified Survey Results

Furnish a copy of certified results of surveys which verify areas and limits of Contractor-acquired real estate rights.

1.2 REGULATORY REQUIREMENTS

1.2.1 Real Estate Rights

Rights for the use of the work and storage areas have been obtained and the general limits of the areas are shown on the drawings. Copies of instruments conveying rights for use of the work and storage areas shown on the drawings and specified herein are available for inspection in the Engineering, Design, & Construction Office, U.S. Army Corps of Engineers, Detroit District, 477 Michigan Avenue, McNamara Building, Detroit, Michigan. Conformance to all applicable requirements of the instruments conveying rights is required. Two (2) copies of each instrument will be furnished to the Contractor. No other real estate rights have been obtained by the Government for this project.

1.2.2 Additional Real Estate Rights

Any additional property agreements and/or real estate rights desired by the Contractor shall be obtained by the Contractor at its own expense.

Such agreements shall clearly relieve the Government of any responsibility for damages or liability resulting from the Contractor's use of such grounds.

SECTION 01 10 10 Page 2

1.3 PROJECT/SITE CONDITIONS

1.3.1 Location and Verification

It shall be the Contractor's responsibility to accurately locate the limits of all lands utilized under the contract. The corner and angle points of each area for which rights have been obtained shall be marked with semipermanent markers except where there is an approved existing property marker. Temporary markers shall be placed at points on alignment. The points on alignment shall be marked at stations so that intervals between points do not exceed 200 feet.

1.3.2 Survey Markers

All markers shall be installed in an area prior to its use and they shall be available for reference during and upon completion of use of the area.

Where approved existing property markers are found, a witness stake, as specified in Subparagraph, "Semipermanent Markers" below, shall be provided. If the types of markers specified hereinafter cannot be used, other types, as approved by the Contracting Officer, shall be provided.

1.3.2.1 Semipermanent Markers

The markers shall be a steel rod one-half inch in diameter and four (4) feet long. The steel rod shall be driven vertically into the ground so that the top is flush with the finished ground surface. Each marker shall be witnessed by a 2" x 2" yellow stake extending two (2) feet above the ground surface and driven into the ground until stable, with not less than one (1) foot penetration.

1.3.2.2 Temporary Markers

Markers shall be 2" x 2", red-colored, wood hub stakes driven into the ground until stable (not less than one (1) foot penetration) with two (2) feet projecting above the ground surface. If the period in which temporary markers are to be in place exceeds one (1) construction season, a more permanent type of marker, as approved, shall be provided.

PART 2 PRODUCTS (NOT APPLICABLE)

PART 3 EXECUTION (NOT APPLICABLE)

-- End of Section --

SECTION 01 10 10 Page 3

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.1 RELATED DOCUMENTS

1.2 PROJECT DESCRIPTION

1.3 WORK COVERED BY CONTRACT DOCUMENTS

1.4 WORK

1.5 OTHER GENERAL REQUIREMENTS

1.6 SUBMITTALS

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.1 HEALTH AND SAFETY

3.2 PROTECTION OF PROPERTY AND OPERATIONS

3.3 CONTRACTOR'S USE OF PREMISES

ATTACHMENTS:

Emergency Action Plan for Boardman Dam

SECTION 01 11 00 Page 1

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.1 RELATED DOCUMENTS

A. All applicable requirements of other portions of the Contract Documents apply to the Work of this Section, including but not limited to Division 1, General Requirements.

B. Definition: COR - Contracting Officer's Representative.

1.2 PROJECT DESCRIPTION

A. SECTION INTENT: This section is intended to provide a summary of the project and the various elements of work associated with it. This summary should be used in conjunction with other Specification sections and the construction Drawings. This section does not provide the technical detail for particular Work Items, but describes the work as a whole, providing an overall perspective to the separate tasks and their interrelationships.

B. GENERAL: The work to be completed consists of four major components, and includes installation and maintenance of erosion and sedimentation control measures for each:

1. The breaching and removal of the Boardman Dam earthen embankment.

Latest dam safety inspection report is available for reference upon request.

2. Restoration of the Boardman River for approximately 10,000 linear feet from Sabin Pond through the extents of the former Boardman impoundment.

3. Demolition and removal of the Boardman Dam powerhouse, intake works and existing Cass Road Bridge.

4. Construction of 400 linear feet of Cass Road roadway.

C. BREACHING AND DAM REMOVAL SUMMARY:

1. Breaching and Dam Removal generally consists of:

a. Site clearing and installation of construction access drives.

b. Excavation of temporary channel from proposed energy dissipation structures to Sabin impoundment.

c. Construction of energy dissipation structures for siphon outlet and auxiliary spillway.

d. Excavation of earthen dam and demolition of concrete core wall to elevation 646.00. Temporarily stockpile roughly 12,000 cubic yards of material adjacent to existing intake channel, to be graded into intake channel later.

e. Installation and operation of siphon dewatering system capable of passing 400 cubic feet per second (cfs). Dewatering will occur at a maximum rate of 1 foot per day.

f. Initial excavation of auxiliary spillway downstream of core wall and installation of bottom 70 feet of articulated block channel armoring with tie in to the auxiliary spillway stilling basin.

g. Full excavation of auxiliary spillway to elevation 623 and installation of remaining articulated concrete block.

SECTION 01 11 00 Page 2

h. Excavation of auxiliary spillway upstream of core wall to elevation 623. Demolition of core wall to elevation 627 in the dry. Demolition of core wall to elevation 623 in the wet with a maximum drawdown rate of 1 foot per day.

i. Dismantle and remove siphon dewatering system.

j. Construct access drive into impoundment upstream of earthen dam.

k. Once impoundment is dewatered to 625, install bulk bag cofferdam and excavate proposed river channel and concrete core wall.

l. Excavation material to be spoiled in intake channel and may be used for Cass Road embankment. Contractor to verify material meets MDOT Class II criteria.

m. Finish grading and seeding and restoration of dam breaching area.

D. SEDIMENT MANAGEMENT AND RIVER RESTORATION SUMMARY:

1. A large deposit of sediment has accumulated in the upstream portion of the Boardman Pond (Impoundment), as noted on the Drawings. The intent is to excavate a corridor through this sediment, wasting material in adjacent disposal areas as noted, to expose the pre-dam Boardman River channel. The average channel dimensions used for grading are a 60-62 foot wide channel top width, 3.3-3.5 foot (average) bankfull depth, and a total of 40 feet of floodplain in alternating widths between the left and right banks. Dimensions will be both deeper and shallower than average to account for pool and riffle development. Dimensions increase slightly in the downstream direction. All cut slopes are 3H:1V (horizontal to vertical) unless steeper native slopes are encountered.

2. The sediment accumulation in the delta above +/- Station 210+00 is primarily sand. The nature and extent of material between approximately Station 210+00 to 177+00 (the dam embankment) is expected to consist of primarily fine material and will be revealed during drawdown of the pond.

3. As finished grades are reached indicators such as the gravel bed of the pre-dam channel and stumps of trees along the pre-dam banks will help guide detailed grading as the old river channel is exposed.

Additional restoration including the enhancement of pool and riffle features and the addition of large wood habitat may occur if budgets allow, but are considered additive items for bidding.

4. Sediment removal may occur under the most efficient means possible, including mechanical, hydraulic, or otherwise. The contractor will provide a detailed submittal of the means and methods for excavation and sequencing. The approach utilized must minimize the transport of sediment downstream of the dam to the extent feasible. Sediment traps will be used to collect material that will mobilize through the work area as an additional control to minimize sediment transport. Controlled drawdown of the headpond will also be used to minimize sediment transport. Some sediment is expected to mobilize and be transported within the work area and downstream of the dam as part of the project.

E. DEMOLITION OF POWERHOUSE, INTAKE WORKS AND EXISTING CASS ROAD BRIDGE:

1. Demolition of Powerhouse, Intake works and existing Cass Road Bridge generally includes:

a. Coordination with the Contracting Officer's Representative for removal of powerhouse equipment and intake gate equipment.

b. Demolition and removal of powerhouse, substructure, spillway, substation, bridge and retaining walls.

c. Inert materials may be disposed of onsite, in former intake channel, according to NREPA Part 115 Section 324.11504 and Section

324.11507. Disposal site shall be capped with 3 feet of fill, topsoil

SECTION 01 11 00 Page 3 and seed.

d. Sampling of wiring and roofing materials for asbestos, lead based paint survey and an inventory of building components that may contain PCBs, mercury, chlorofluorocarbons, refrigerants, and other potentially hazardous materials.

e. All hazardous material shall be disposed of according to local, state and federal regulations.

f. Coordination with utility companies for removal power service and work around utilities.

F. CONSTRUCTION OF CASS ROAD

1. Construction of Cass Road generally consists of:

a. Removal of guardrail, barrier, traffic signals, HMA, and excavation of earthen material to subgrade.

b. Earthworks for preparation of roadway embankment.

c. Installation of aggregate base, HMA and pavement striping.

d. Seeding and restoration of site.

e. Coordination with utility companies for work around utilities.

1.3 WORK COVERED BY CONTRACT DOCUMENTS

A. The following permits have been applied for:

1. Joint Permit Application from the Michigan Department of Environmental Quality.

2. Natural Rivers Permit from the Michigan Department of Natural Resources

3. Grand Traverse County Road Commission permit to work in Right-of-Way.

B. The requiredWork for this contract includes:

1. Obtain permits as follows:

a. Demolition permit from the Grand Traverse County Construction Codes Department, and submit a notification (Notice of Intent to Renovate/Demolish) to MDEQ at least 10 working days prior to the demolition date. Prior to application for the demolition permit a NESHAP (40CFR Part 61, Subpart M) must be completed.

b.Soil and Sedimentation Control Permit (Part 91) from the Grand Traverse County Drain Commissioner.

b. Any other permits that may be required.

2. At existing impoundment elevation (approximately 640.0) set up all controls onsite, including erosion and sedimentation controls.

Complete preliminary grading in the upper impoundment and sediment traps (Station 256+00 to 224+00) and pilot channel from Boardman Dam to Sabin Pond (Station 174+00 to 156+83).

3. Sampling and analysis of powerhouse wiring and roofing materials for existence of asbestos containing material (ACM). Identify other potential hazardous material for abatement. Previously identified items include; potential lead based paints, fluorescent light tubes potentially containing mercury, and potential PCB containing material including caulking, oil, and electrical equipment.

4. Install siphon system and auxiliary spillway system. Dewater impoundment to elevation 633.0 at a rate of no greater than 1 foot per day or as dictated in the approved Joint Permit Application (JPA).

5. Complete preliminary grading and sediment traps from Station 224+00 to 210+00.

6. Remove existing powerhouse, intake works and existing Cass Road Bridge.

Construct Cass Road roadway. This work will require coordination with the Contracting Officer's Representative for removal of powerhouse equipment and intake gate equipment which is the property of a third party.

7. Dewater impoundment to elevation 627 with siphon system. Construct incremental auxiliary spillway configuration with final iteration crest

SECTION 01 11 00 Page 4 elevation at 623. Dewater with incremental demolition of core wall at auxiliary spillway from elevation 627 to 623. Install and manage sediment trap upstream of earthen dam.

8. Complete preliminary grading of channel through earthen dam.

9. Finish grade project site and install channel stabilization measures, habitat structures, slope stabilization and permanent seeding.

10. Any work referred to as "proposed" within the specifications package or Drawings shall be considered required under this contract.

C. The work of any one trade, Contractor or Subcontractor shall not be limited to the work listed in a Section under "Project Description". Such listings are intended as general guides to the contents of a Section, and not as a scope of the work. Unless otherwise indicated, provide and pay for all labor, materials, equipment, tools, construction equipment and machinery, water, heat, utilities, transportation, test equipment, testing and other facilities and services necessary for the proper execution and completion of the work, whether temporary or permanent, and whether or not incorporated or to be incorporated in the work.

1.4 WORK

A. SEQUENCE

General

1. The work shall be planned, scheduled, and performed in stages in order to complete the Work within the requirements of the Specifications and Drawings and the requirements of appropriate regulatory agencies and permits.

2. The sequence shall be in the general sequence described by Drawings B-1.2, R-0.2 and R-0.3.

1.5 OTHER GENERAL REQUIREMENTS

A. Comply with all project permits and apply/obtain all Contractor responsible permits prior to the commencement of work

B. Make arrangements for temporary storage of materials and supplies and for timely delivery to the project site

C. Assist the Contracting Officer's Representative as required in the review of construction.

D. Maintain up-to-date records on-site.

E. maintain the Limits of Work in a neat condition.

1.6 SUBMITTALS

A. The Contractor shall submit the following items to the Contracting Officer's Representative in accordance with Section 01 33 00:

1. Sequencing Plan; G, AOF: Project sequencing plan, including sequence, means, methods, equipment, and schedule for the project work scope.

2. Temporary Impoundment Dewatering System Plan and Design; G, AOF: Submit shop drawings showing fabricated details of the temporary dewatering system, or design and details of alternative dewatering systems that might be proposed by the Contractor. Alternative dewatering system design must consist of enclosed bypass that does not alter the structureal integrity of the dam or the conveyance capacity of the intake and powerhouse prior to dewatering the impoundment to a maximum elevation of 628 and shall be sealed by a Professional Engineer licensed in the State of Michigan.

SECTION 01 11 00 Page 5

PART 2 PRODUCTS (Not Used)

PART 3 EXECUTION

3.1 HEALTH AND SAFETY

A. The contractor is responsible for understanding and being prepared to follow and fully implement the "USACE Manual No. 385-1-1 dated 30 November 2014". In addition, it will be required that any full-time superintendent maintain a copy of this plan at all times on site, and perform at least one (1) emergency response drill in cooperation with the County Emergency Management Coordinator during the first week of construction.

B. The contractor is responsible for understanding and being prepared to follow and fully implement the "Emergency Action Plan for Boardman Dam" dated December 2012 as included in these specifications.

In addition, it will be required that any full-time superintendent maintain a copy of this plan at all times on site, and perform at least one (1) emergency response drill in cooperation with the County Emergency Management Coordinator during the first week of construction. During construction, the contractor must maintain an adequate level of preparedness, as determined by the County Emergency Management Coordinator, for an unexpected dam breach.

3.2 PROTECTION OF PROPERTY AND OPERATIONS

A. The project will occur within the County Natural Education Reserve property. Residences are in close proximity along the east and west edges of the impoundment. Impacts to adjacent property owners shall be minimized. The Boardman River is a heavily utilized recreational river with watercraft and fisherman moving through the river. Signage will be in-place notifying users of the project, but the Contractor is notified of the potential for the general public to enter the work area through the river corridor.

B. The Contractor shall utilize every precaution to protect the property from damage during execution of the Work. Any damage that the Contractor may inflict shall be repaired or replaced in a prompt manner as directed by the Contracting Officer's Representative (COR) at no additional cost to the USACE.

C. The Contractor shall utilize every precaution to protect the remaining dam equipment from damage during demolition of the dam structure. Any damage that the Contractor may inflict shall be the responsibility of the contractor, repaired or replaced in a prompt manner as directed by the Contracting Officer's Representative at no additional cost to the

USACE.

D. The Contractor shall take all measures required to minimize adverse impacts from execution of the work on property abutters and shall not interfere with their operations.

E. The Contractor shall coordinate site restrictions and vehicular/pedestrian traffic control plans as appropriate.

3.3 CONTRACTOR'S USE OF PREMISES

A. Confine operations at the site to areas permitted by law, ordinances, permits and the Contract Documents and do not unreasonably encumber

SECTION 01 11 00 Page 6 the Site with any materials or equipment. The Contractor shall use only those designated areas of the Site for staging and storage.

Staging and storage areas are to be agreed upon and accepted by the Contracting Officer's Representative.

B. The Contractor shall assume full responsibility for the protection and safe keeping of products and equipment under this Contract that are stored on-site during the project construction.

C. At all times, provide the Contracting Officer's Representative easy and safe access to the work wherever it is in preparation and progress.

Provide such access so COR may perform his functions.

Attachments:

Emergency Action Plan for Boardman Dam

-- End of Section --

SECTION 01 11 00 Page 7

EMERGENCY ACTION PLAN

BOARDMAN DAM

National Inventory of Dams No. MI00512 Boardman River

Grand Traverse County, Michigan

Owner:

Grand Traverse County

400 Boardman Ave.

Traverse City, MI 49684

December 2012

CONTENTS OF PLAN

Page No.

I. Notification Flowchart 3

II. Statement of Purpose 6

III. Project Description 7

IV. Emergency Detection, Evaluation and Classification 9

V. General Responsibilities Under the EAP 11

A. Licensee Responsibilities

B. Responsibility for Notification

C. Responsibility for Evacuation

D. Responsibility for Termination and Follow-Up

E. EAP Coordinator Responsibility

VI. Preparedness 15

A. Surveillance

B. Response During Periods of Darkness

C. Access to Site

D. Response During Weekends and Holidays

E. Response During Periods of Adverse Weather

F. Alternative Systems of Communication

G. Emergency Supplies and Information

VII. Inundation Maps 18

VIII. Appendices 19 A. Investigation and Analyses of Dambreak Floods B. Plans for Training, Exercising, Updating and Posting the EAP C. Site-Specific Concerns D. Documentation E. Approval of the EAP

EMERGENCY ACTION PLAN

BOARDMAN HYDROELECTRIC DAM PROJECT

I. NOTIFICATION FLOWCHARTS

The purpose of this Plan is to give specific guidelines to be followed by Grand Traverse County personnel and emergency warning agencies in the event of a failure of a dam structure or earthen dike that would cause an uncontrolled release of flow and could result in property damage and/or loss of life. Specific chains of command and sequences of notification are given for the following two possible failure situations.

Condition A. Failure has occurred or is imminent

1. General Definition: Once a determination has been made that there is no longer any time available to attempt corrective measures to prevent failure, the “failure is imminent or has occurred” warning should be issued. “Failure is imminent” and “failure has occurred” should conservatively be interpreted as essentially the same condition for evacuation purposes.

Condition B. Potentially Hazardous Situation is Developing

1. General Definition: Some amount of time is still available to take action during certain events (such as major floods) that may prevent failure.

The Notification Flowcharts appear on pages 4 and 5 of this Emergency Action Plan.

Notification Flowcharts shall be prominently posted at the Central Dispatch Office, the Emergency Management Office, the Department of Public Works office, and at the powerhouses at the Boardman and Sabin Dams.

LISTING OF DOWNSTREAM RESIDENTS

An approximate list showing the name, address and telephone numbers of residents located downstream is provided in Appendix C of this plan. In the event of a potential failure there may be time to call the entire list. The County does not have personnel available to telephone the entire list. The early warning siren would be the fastest means of notification.

Grand Traverse County Sheriff Radio A-3

Traverse City Fire Radio TC FIRE

Traverse City Police Radio A-1

State Police Radio A-3 or STATEW &

Grand Traverse Metro/Rural Fire Radio A-6

County Roads Radio

Emergency Management Coordinator Office 231-995-6059 Cell 231-590-2373

County Administration 231-922-4780

County DPW Sam Tyson, 231-590-2658

State Emergency Management State DEQ

CONDITION A:

Failure has occurred or is imminent

Notify City, Metro and Rural Fire by phone

Notify City Police and County Sheriff shift commanders

Emergency Management Coordinator

231-995-6059 Cell 231-590-2373

County Administration 231-922-4780

County DPW Sam Tyson,231-590-2658 Office

231-995-6039

State Emergency Management State DEQ

CONDITION B:

Potentially Hazardous Situation is

Developing

II. STATEMENT OF PURPOSE

This plan defines responsibilities and provides procedures designed to identify unusual and unlikely conditions which may endanger Boardman Dam in time to take action to mitigate and to notify the appropriate emergency management officials of possible, impending, or actual failure of the Dam. The plan may also be used to provide notification when flood releases will create major flooding.

III. PROJECT DESCRIPTION

The Boardman Dam is located on the Boardman River in Grand Traverse County, approximately 4 miles upstream of Traverse City, Michigan.

All elevations are given in feet and are referenced to National Geodetic Vertical Datum (NGVD). The normal headwater elevation at the Boardman Dam is 639.3 feet. The drainage area of the Boardman River at the Boardman Dam is 237 square miles.

Project structures are referred to in this report as left and right looking downstream. From left to right the project structures consist of a 650 foot long detached earth dike that spans the original river channel, an emergency spillway section, a concrete dam/bridge structure containing a spillway structure and the penstock intake that leads to the powerhouse, and a short earth dike.

The powerhouse is located approximately 73 feet downstream from the intake.

A. Dam. The earth dikes are constructed of sand fill. The detached dike is approximately 650 feet long with a maximum height of 43 feet, and spans the original river channel.

The dikes were constructed using ordinary fill and compaction methods.

B. Spillway. Principal spillway discharge is provided by the concrete spillway located to the left of the penstock intake structure. The spillway contains one 18-foot-wide by 13-foot-high steel roller gate. The Cass Road bridge passes over the spillway and the intake structure.

C. Powerhouse and Intake. The penstock intake is located to the right of the roller gate spillway and feeds two 10-foot-diameter penstocks. Both penstocks bypass the spillway.

The reinforced concrete powerhouse is located approximately 73 feet downstream of the intake.

Additional spillway capacity is provided by an emergency spillway located between the roller gate spillway and the left detached earth dike. The emergency spillway directs flow into the area between the detached dike and the Cass Road embankment. The only outlets through the highway embankment are an abandoned penstock and a highway culvert. Normally flow bypasses this area through the powerhouse or main spillway, but in the event of a dike breach or the functioning of the emergency spillway, the highway embankment would impound water and eventually be overtopped.

D. Map of Vicinity

A vicinity map is shown on following page(s).

E. Facility Drawing

A facility drawing is shown on following page(s).

F. Associated Dams. The Sabin (owned by Grand Traverse County) and Union Street (owned by the City of Traverse City) dams are located 0.7 and 4.7 miles downstream of Boardman Dam, respectively, Sabin Dam impounds Sabin Pond, and Union Street Dam impounds Boardman Lake in Traverse City.

G. Site Specific Concerns. When personnel are dispatched to the site under adverse conditions, the employees should be equipped with portable lighting and a two-way portable radio whenever possible. See Appendix C for additional information.

IV. EMERGENCY DETECTION, EVALUATION, AND CLASSIFICATION

Detection:

Headwater and tailwater monitoring of the facility is conducted at a minimum of five days a week, additional monitoring during inclement weather. The Grand Traverse County Department of Public Works currently monitors headwater and tailwater levels on a daily basis.

A phone call may be received from an observer or reliable source indicating that an abnormal, hazardous, or emergency situation exists.

The Department of Public works Manager may also dispatch personnel to the site to observe, monitor, and report on conditions. Daily on-site inspections of the facilities and dam are conducted by Grand Traverse County Department of Public Works employees.

Conditions or events that may cause an abnormal, hazardous, or emergency situation include spillway gate failure, structural failure, dike failure, heavy continuous rainfall, earthquake, terrorism, etc.

Evaluation:

Information and data received needs to be evaluated so as to assess the severity and magnitude of the situation.

The rate of change (sudden change vs gradual change) of headwater and tailwater levels and weather condition (sunny day vs heavy rain) are two important factors to consider. In the case of an on-site observation, either by a reliable observer or employee, an immediate decision can reliably be made as to the severity and magnitude. The Public Works Manager may also dispatch personnel to the site to monitor and report on conditions when circumstances (such as continuous heavy rainfall) would indicate that a potential for a hazardous situation to develop are present. The Public Works Manager has the ability to monitor weather conditions via Internet web sites.

Classification:

Two emergency classifications have been developed which are:

Condition A - Failure has occurred or is imminent

Condition B - Potentially hazardous situation developing

Once Detection and Evaluation phases are completed, a determination as to whether Condition A or Condition B exists shall be made. General definitions of these conditions are provided in Section I. Responsibilities regarding each condition are provided in Section V. “Declaration of an emergency can be a very controversial decision. The issue should not be debated too long.

An early decision and declaration is critical to maximize available response time”, per Federal EAP Guideline

V. GENERAL RESPONSIBILITIES UNDER THE EMERGENCY ACTION PLAN

The purpose of this plan is to give specific guidelines to be followed by Grand Traverse County personnel and emergency warning agencies in the event of a failure of a dam structure or earthen dike at the Boardman dam located on the Boardman River in Grand Traverse County, Michigan.

A. Owner’s Responsibilities Regular physical inspections are used for continuous headwater and tailwater monitoring of the facility by Department of Public Works personnel each working day throughout the week. Additional inspections are conducted during inclement weather events.

Upon becoming aware that an abnormal headwater or tailwater condition exists, the Grand Traverse County Department of Public Works Manager, in conjunction with the Emergency Management Coordinator, will make a determination with regard to the severity of the problem and initiate the “Condition A” or “Condition B” response procedure, if appropriate. Both response procedures include prompt contact of Grand Traverse County personnel and Central Dispatch (911). Central Dispatch will contact the Emergency Management Coordinator and Grand Traverse County Sheriff’s Office, City and State Police, and City and County Fire Departments. Central Dispatch will also activate the Early Warning Sirens. Adjustment of spillway gates and adjustment of water intakes/generation will be done as deemed appropriate.

The Public Works Manager will take appropriate action to determine the nature of the failure or dangerous situation. If notification has been received from an observer, the Manager will obtain the name, address and telephone number of the caller, the information about the type and time of failure. If necessary, the Manager will dispatch personnel, equipped with a two-way, portable radio, to inspect the dam. He will then advise the Emergency Management Coordinator, request emergency repairs, and continue to monitor the situation closely. The Public Works Manager will also contact Central Dispatch, who will contact local agencies and keep them informed of the situation.

B. Responsibility for Notification CONDITION A - Failure has occurred or is imminent

A Notification Flowchart delineating the contacting responsibilities for the various individuals or agencies involved in a rapidly developing or instantaneous failure at the Boardman Dam is presented in Section I of this plan. The dam shall be considered about to fail if a serious structural deficiency or an uncontrolled flow of water that cannot be corrected or contained develops, making failure imminent, or if the structural deficiency or uncontrolled flow has the likely potential of increasing to catastrophic proportions, causing failure of part of the dam. The most likely mode of failure at Boardman Dam is overtopping of the dam embankment. Overtopping can occur because of flooding and/or incorrect operation the dam.

Upon becoming aware that a condition exists that is likely to cause imminent failure, Central Dispatch will initiate the Condition A” warning procedure as follows:

1. Central Dispatch

a. Activate Early Warning Siren and use CodeRED Notification System to notify the following that a dam failure has occurred or is imminent:

b. Contact the Emergency Management Coordinator Business: (231) 995-6059 Cell (231) 590-2373

The Emergency Management Coordinator will be responsible for organizing and coordinating warning and evacuation procedures with appropriate agencies using the inundation maps included in Section VII of this Emergency Action Plan. If the Emergency Management Coordinator is not available, the County Sheriff’s office will implement the Grand Traverse County Warning and Evacuation Procedures.

c. Notify Grand Traverse County Sheriffs Department via Radio

d. Notify Grand Traverse Metro/Rural Fire via Radio

e. Notify Traverse City Fire via Radio

f. Notify Traverse City Police via Radio

g. Notify State Police Post via Radio

h. In the event of an imminent or actual failure, potentially affected property owners between the Boardman Dam and the Traverse City limits can be contacted by telephone using the listing that appears in Appendix C of this Emergency Action Plan. Affected residents within city limits will be identified using the inundation map located in Section VII of this Emergency Action Plan and notified by messenger.

2. Other Actions

a. After completion of the warning procedures, the Director of Grand

Traverse County Department of Public Works will assess the damage to the dam and formulate a plan for emergency repairs.

CONDITION B - Warning Procedure if Potentially Dangerous Situation is Developing

Section I of this plan includes a flowchart summarizing the sequence of notification if a potentially hazardous situation is developing.

Upon becoming aware that a unknown condition exists that may affect the dams normal operations, Central Dispatch will initiate the Condition B” warning procedure as follows:

The notification procedures are as follows:

1. Central Dispatch

a. Notify County DPW of situation

b. Contact the Emergency Management Coordinator

Business: (231) 995-6059 Cell (231) 590-2373

If needed the Emergency Management Coordinator will be responsible for organizing and coordinating warning and evacuation procedures with appropriate agencies using the inundation maps included in Section VII of this Emergency Action Plan. If the Emergency Management Coordinator is not available, the County Sheriff’s office will implement the Grand Traverse County Warning and Evacuation Procedures.

2. Other Actions

a. After completion of the notification procedures, the Director of Grand

Traverse County Department of Public Works will assess the situation of the dam and formulate a plan for emergency repairs.

If a potentially dangerous situation is developing at Boardman Dam, the failure of Sabin and Union Street Dams downstream may be caused. Inundation maps for the potential areas subject to flooding are shown in Section VII of this Emergency Action Plan. In the event of an imminent or actual failure, potentially affected property owners between the Boardman Dam and the Traverse City limits can be contacted by telephone or in person using the listing that appears in Appendix C of this Emergency Action Plan. Affected residents within city limits will be identified using the inundation map located in Section VII and notified by messenger.

C. Responsibility of Evacuation

Central Dispatch is responsible for notifying the appropriate emergency management officials when major flooding is anticipated, a dam failure is imminent or has occurred, or a potentially hazardous situation is developing.

It is the responsibilities of other local authorities who have the statutory obligation for evacuation of people. However, there may be situations in which routine notification and evacuation will not suffice, as in the case of a resident located just downstream of the dam. In these situations, Grand Traverse County personnel may arrange to notify these residences directly. When possible, these activities should be coordinated with the appropriate public agencies.

D. Responsibility for Termination and Follow-Up The Grand Traverse Department of Public Works director shall ensure that Public

Works personnel are monitoring the situation at the dam and keeping Emergency Management informed of developing conditions at the dam from the time that an emergency starts until the emergency has been terminated. The Emergency Management Coordinator will also contact Central Dispatch and local agencies and keep them informed of the situation.

The Emergency Management Coordinator is responsible for declaring that the emergency at the dam is terminated and for termination of the disaster response activities.

Provisions for security measures may include use of local law enforcement, fire departments, or any authorized personnel.

Within 60 days after the emergency has been terminated, the Emergency Management Coordinator shall conduct a follow-up evaluation, including input from other outside participants. The evaluation shall be documented on a written report.

E. Emergency Management Coordinator Responsibilities

Duties of the Emergency Management Coordinator include the following:

Conducting necessary training, prepare revisions to the Emergency Action Plan and provide documentation thereof to the Michigan Department of Environmental Quality and conducting annual plan review as described in Appendix B of this Emergency Action Plan, preparing revisions as required and distributing to all plan holders.

1. Conducting an annual test of state of readiness as needed in Appendix B of this Emergency Action Plan.

2. Coordinating Emergency Action Plan related activities and serving as the contact should any questions arise.

VI. PREPAREDNESS

B. Surveillance

The Grand Traverse County Department of Public Works monitors the dams on the Boardman River on a continuing basis. General on-site inspection of each dam is done daily, at a minimum, by Grand Traverse County Department of Public Works employees.

The Boardman Dam facility contains two separate penstocks and draft tubes.

During periods of actual or forecasted high flows a Grand Traverse County employee equipped with a two-way portable radio may be stationed at the dam.

There may be emergency situations in which routine notification and evacuation will not suffice, as in the case of a resident located just downstream of the dam.

In these situations, Grand Traverse County personnel may arrange to notify those residents directly.

C. Response During Periods of Darkness

Such lighting would have to be provided by vehicles or portable means. The Notification Flowcharts include 24-hour telephone numbers which can be used day or night.

D. Access To Site

A rapidly developing dam failure could inundate some downstream roads and therefore require preplanned transportation routes. Boardman Dam should be approached from the east side because the spillway is at the east side of the dam and the low point of the dam is west of the spillway.

E. Response During Weekends and Holidays

For response during weekends and holidays, Central Dispatch (9-1-1) shall call-out personnel as per procedure.

F. Response During Periods of Adverse Weather

During periods of actual or forecasted high flows, a Department of Public Works employee with a two-way radio may be stationed at the dam 24 hours a day. In the event of a failure, the Public Works Manager can contact Central Dispatch (communications/warnings offices) by telephone or by radio. Access to site includes use of Grand Traverse County snow removal equipment.

Presently there is no lighting available for illumination of the spillway or operating deck at the dam. Response time to the site is expected to be less than 30 minutes.

F. Alternate Systems of Communication

The principal means of communication would be the commercial telephone system. In the event of an emergency, the emergency operations center will be the communications control point. The Emergency Operations Center is equipped with one radio console and ten outgoing phone lines. Seventeen radio frequencies are available for radio communication with Sheriff, Fire Departments, Police, Department of Public Works personnel, and County Road Commission. The Emergency Operations Center can be linked to the Gaylord NWS office by both phone, cellular phone, and 800MHz Radio.

G. Emergency Supplies and Information

1. Stockpiling of Materials Sandbags are available locally from:

Grand Traverse County Facilities Management 231-995-4401 or 9-1-1

McGough’s (231) 947-5900 After hours: (231) 933-1172 Tim Lampton

Sand is available locally from:

Elmer’s Concrete (231) 943-3443

(231) 933-4449 Home (Troy Broad) 218-4967 Mobile

(231) 946-4572 Home (Todd) 218-4968 Mobile

Information regarding available materials, their location, equipment and operating personnel are currently on file with the emergency management coordinator as part of the City of Traverse City and Grand Traverse County Emergency Operations Plan. Both office and home phone numbers are included in the listings.

2. Alternate Sources of Power and Equipment

The main source of power to open the Boardman Dam gate is heavy equipment or vehicle cable hoist. The gate can be opened manually by an overhead crane. A backup generator may also be an option. Other alternate equipment sources include vehicles which are owned, operated, and maintained by Grand Traverse County.

3. Coordination of Weather Information and Flows

There are no sources on the Boardman River which relay river stage information; however, up-to-date and advanced precipitation and river stage forecasts can be obtained from the National Weather Service (NWS). The Emergency Operations Center can be linked to the Gaylord NWS office by both phone and radio. The Public Works Manager also has access to weather information via the Internet.

4. Flow Control Procedure

If a large breach has developed, no action should be taken to lower the reservoir water surface more rapidly. However, if a small breach exists, or no breach at all, the reservoir water surface should be lowered to prevent a rapidly developing dam failure from occurring. Inflow to the reservoir cannot be controlled.

. Other Available Resources/Contacts

Wade-Trim Inc. Brian Sousa 800-968-6660 or 231-878-0144

Gosling Czubak, Inc. Charles Brumbaugh, PE.,Manager Michael Schaeffer, PE

Work: (231) 933-5110 Work: (231) 933-

Cell: (231) 342-0901 Home: (231) 947-

Home: (231) 947-1448

AMEC Engineering - Sandra Sroonian 231-922-9050 x 201 or 231-230-6057

URS – Troy Naperala - 231-932-7592 x 223

U. S. Corps of Engineers

VII. Inundation Maps

The Emergency Action Plan Inundation Maps show the areas potentially inundated due to two failure scenarios: a normal flow failure and a failure during the flood condition. The flood condition failure used in this analysis is the Probable Maximum Flood for the Boardman Dam.

The area inundated during the normal flow failure is outlined by a dashed line and colored in yellow. The additional area inundated by the flood condition failure is outlined by a solid line and colored in orange. The downstream boundary of each inundation zone is the point where the failure of the dam would cause an incremental rise of less than 2 feet.

The inundation areas, river levels, and travel times shown on the map reflect the specific failure assumptions discussed in Section VIII, Appendix A of this Emergency Action Plan. These assumptions are selective and meant to represent a worst-case scenario of downstream flooding. An actual failure of the dam could result in somewhat different downstream flooding, depending on the type and timing of the failure and antecedent river flows. Therefore, the map should serve as a guide for warning and evacuation, but does not replace the judgment and local experience of emergency government officials.

The travel times shown on the inundation map are the time for the front of the flood wave to reach that location on the downstream channel and the time for the peak of the flood wave to reach that point from the beginning of the failure of Boardman Dam. The location of the front edge of the flood wave was identified as the point where the river levels begin to rise due to the dam failure. Travel times shown are those predicted using the DAMBRK computer model for the failure assumptions used in the analysis, actual travel times may vary depending on the type of failure and antecedent flood.

APPENDIX A

INVESTIGATION AND ANALYSES OF DAMBREAK FLOODS

BOARDMAN DAM PROJECT

1. Scope of Project

Dam failure analyses were earlier performed as a part of the Emergency Action Plan (EAP) to determine the extent of hazardous flooding that could occur as a result of a failure of the Boardman Dam. The dam failure analyses were performed for two antecedent flow conditions: normal flows, and the flood condition. The study includes computer simulated routing of the breach outflow hydrograph downstream of the dam to a point where no additional hazard would be expected to occur as a result of the failure of Boardman Dam. Delineation of the flood affected areas due to the dam failures is also part of this study.

2. Description of the Project

The Boardman Dam is located on the Boardman River in Grand Traverse County, approximately 4 miles upstream of Traverse City, Michigan.

All elevations are given in feet and are referenced to National Geodetic Vertical Datum (NGVD). The normal headwater elevation at the Boardman Dam is 639.3.

The drainage area of the Boardman River at the Boardman Dam is 237 square miles.

Project structures are referred to in this report as left and right looking downstream.

From left to right the project structures consist of a 650 foot long detached earth dike that spans the original river channel, an emergency spillway section, a concrete dam/bridge structure containing a spillway structure and the penstock intake that leads to the powerhouse, and a short earth dike. The powerhouse is located approximately 73 feet downstream from the intake.

The Sabin (owned by Grand Traverse County) and Union Street Dams (owned by the City of Traverse City) are located 0.7 and 4.7 miles downstream of Boardman Dam, respectively. Sabin Dam impounds Sabin Pond, and Union Street Dam impounds Boardman Lake in Traverse City.

3. Antecedent Flooding

Normal Flow. For the normal flow failure analysis, an antecedent flow of 325 cfs was assumed. This was determined using the drainage area at the dam and the average discharge for the period of record at the USGS gage located just downstream of the Brown Bridge Dam. The discharge per square mile at the gage was applied to the drainage area at the Boardman Dam to determine an approximate normal discharge. There are no significant tributaries located between the Boardman Dam and Lake Michigan.

Flood Condition. It has been determined from the 1994 Probable Maximum Flood (PMF) and inflow Design Flood (IDF) analysis for the Boardman Dam that the IDF for the Boardman Dam should be equal to the PMF. The peak of the PMF hydrograph is 10,000 cfs. The PMF hydrograph was used as the antecedent inflow to the Boardman Reservoir. There are no major tributaries located between the Boardman Dam and Lake Michigan.

4. Type of Failure

The “worst-case” failure of the Boardman Dam was assumed to occur in the left detached dike section. The breach was assumed to fail down the elevation 620.0 feet (approximately the average natural ground level) and to have an average breach width of five times the breach height, or 194 feet, and 1H:1V side slopes. The time for the breach to develop was assumed to be 0.1 hours. These failure parameters are conservative and consistent with current guidelines.

During the normal flow failure of the Boardman Dam, the Cass Road embankment, located just downstream of the left detached dike, was…