23180 Mackinac Island East Bluff Retaining Wall - Drawings.pdf

PDF 6 MB Posted May 19, 2025

Attached to: 751/23180. ABG; Mackinac Island East Bluff Retaining Wall
Solicitation number: RFQ-171-250000000373-5
Issued by: Lenawee County, Michigan

About this file

Written by GovTribe AI · May 20, 2025

The document is a comprehensive set of bidding plans and technical drawings for the Mackinac Island East Bluff Retaining Wall project, prepared by the Michigan Department of Technology, Management and Budget (DTMB) for Mackinac Island State Park. The project involves replacing the existing retaining wall along the East Bluff of Mackinac Island, with detailed civil, structural, and site plans spanning multiple sheets. The drawings, dated April 23, 2025, are issued for bidding purposes and include site location maps, soil boring reports, removal plans, construction details, and wall elevation and section drawings. The project appears to focus on stabilizing the shoreline and addressing erosion issues with a new retaining wall system using Redi-Rock blocks.

The technical drawings indicate a complex engineering project with specific requirements for wall construction, drainage, and erosion control. The proposed wall will vary in height from 7'-6" to 10'-6" and includes detailed specifications for materials like HMA (Hot Mix Asphalt) construction, soil erosion control, and drainage installations. The project site is located on Huron Road in Mackinac Island, and the drawings provide extensive technical details about wall sections, drain installations, and site preparation. The documents suggest careful consideration of the site's geological conditions, as evidenced by the soil boring reports and meticulously planned wall construction techniques to ensure stability and longevity of the infrastructure.

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AREA LOCATION

MAP

CHICAGO

MILWAUKEE LAKE

MICHIGAN

DETROIT

LAKE

HURON

SAULT

STE

MARIE

MARQUETTE

HOUGHTON

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SUPERIOR

DULUTH

MINNEAPOLIS

GREEN BAY

ESCANABA

TRAVERSE

CITY

GRAND RAPIDS

LANSING

PROJECT

LOCATION

CHAMPION

AREA LOCATION

MAP

GENERAL NOTES:

I Certify That The Civil Plans Were Prepared Under My Direct Supervision

PROJECT LOCATION MAP

OHM PROJECT No.

DATE:

DTMB File No.

7136-23-0050 2025/04/23

BIDDING PLANS

751/23180.ABG

OWNER:

MACKINAC ISLAND STATE PARK COMMISSION

7023 HURON RD

MACKINAC ISLAND, MI 49757

CONTACT: STEVE BRISSON

BRISSONS@MICHIGAN.GOV

PHONE: 231-436-4100

ARCHITECT/ENGINEER:

OHM ADVISORS

424 HANCOCK STREET

HANCOCK, MI 49930

906.482.0535

PROJECT CONTACT

JARED HYRKAS

1. GENERAL NOTES APPLY TO ALL DRAWINGS.

2. EXCEPT WHERE OTHERWISE INDICATED ON THESE PLANS, OR IN THE CONTRACT DOCUMENTS

AND SPECIFICATIONS CONTAINED HEREIN, ALL MATERIALS AND WORKMANSHIP SHALL BE

ACCORDING TO THE MICHIGAN DEPARTMENT OF TRANSPORTATION STANDARD SPECIFICATIONS

FOR CONSTRUCTION, 2020 EDITION.

3. DO NOT SCALE DRAWINGS. ANY DIMENSIONAL INFORMATION REQUIRED WHICH IS NOT

INDICATED ON DRAWING DIMENSION STRINGS SHALL BE OBTAINED FROM THE ENGINEER.

4. CONTRACTOR SHALL VERIFY ALL EXISTING DIMENSIONS AND CONDITIONS. IF DISCREPANCIES

ARE FOUND, NOTIFY ENGINEER BEFORE PROCEEDING WITH WORK.

5. CONTRACTOR SHALL PAY ALL PERMIT FEES AND FEE REQUIRED FOR ANY PERMIT EXTENSIONS.

6. CONTRACTOR SHALL MAINTAIN THE IMMEDIATE CONSTRUCTION SITE IN A SECURE, CLEAN AND

SAFE MANNER.

7. PROTECTION: CONTRACTORS SHALL BE SOLELY RESPONSIBLE FOR TAKING ALL STEPS

NECESSARY TO PROTECT THE PUBLIC FROM INJURY AND ADJACENT PROPERTY FROM DAMAGE

DURING CONSTRUCTION.

8. REPAIR ALL EXISTING CONSTRUCTION AFFECTED BY NEW WORK TO ITS ORIGINAL CONDITION.

9. THE LOCATION OF ALL PUBLIC UTILITIES SHOWN ON THESE PLANS IS TAKEN FROM THE BEST

AVAILABLE DATA. PURSUANT TO ACT 174 OF THE P.A. OF 2013, AS A CONDITION OF THIS

CONTRACT, NOTICE SHALL BE GIVEN TO MISS DIG PRIOR TO UNDERGROUND WORK TO BE

PERFORMED IN ACCORDANCE WITH THIS CONTRACT. PHONE (800) 482-7171.

MACKINAC ISLAND RETAINING WALL

PROJECT LOCATION

I Certify That The Structural Plans Were Prepared Under My Direct Supervision

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EAST BLUFF RETAINING WALL REPLACEMENT

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TYPICAL TRANSITION HURON ROAD SECTION - PROPOSED STA 0+15 TO 0+25 AND 1+63 TO 1+731

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RETAINING WALL SECTION - 9'-0" to 10'-6" WALL HEIGHT1

REDI-ROCK DRAIN INSTALLATION DETAIL3

RETAINING WALL SECTION - 7'-6" WALL HEIGHT OR LESS2

Sheets and Views

DT COVER

C-001 NOTES

C-090 SOIL BORINGS

C-091 SOIL BORINGS 2

C-120 REMOVAL PLAN

C-130 SITE PLAN

C-501 DETAILS

S-001 STRUCTURAL NOTES

S-101 RETAINING WALL ELEVATION

S-500 RETAINING WALL SECTION

File details come from the government source that posted it. Updated May 20, 2025.