00210 IFB Attachments (Contract1)_Part6.pdf
PDF 3 MB Posted
- Solicitation number
- RFQ 171 230000000484 4
- Issued by
- Huron County, Michigan
About this file
This file consists of technical permit drawings and specifications for the Michigan Department of Natural Resources (MDNR) Parks and Recreation Division regarding the Port Austin Harbor Breakwater Modification project located on Lake Huron in Port Austin, Michigan (Huron County). The project involves the enlargement of west floating docks and the modification of the harbor breakwater system. Key components include the installation of fifteen 16-inch diameter steel pipe piles at 40-foot lengths, replacement timber floating dock guide pile loops, and navigation channel mitigation dredging. The proposed floating docks will maintain the same footprint as previously permitted and constructed configurations, with typical dimensions ranging from 30 to 60 feet in various sections. The design includes a typical guidepile section with piles pre-drilled and grouted to depths of approximately 40 feet, with pile bottoms at elevation 548.5 feet. The navigation channel mitigation area requires approximately 250 cubic yards of dredging to bring the mitigation area to the full project depth of Low Water Datum minus 12 feet (565.5 feet elevation).
The technical specifications reference the IGLD 85 datum and document average water levels at 581.51 feet as of the survey date. The United States Army Corps of Engineers (USACE) ordinary high water mark is established at 581.5 feet, while the Michigan Department of Environment, Great Lakes, and Energy (EGLE) ordinary high water mark is set at 580.5 feet. The documents are dated October 1, 2021, with a revision dated February 14, 2023, and reference file number LRE-2007-00842-16. Design and permitting services were provided by Edgewater Resources, based in St. Joseph, Michigan. The project location is identified through specific northing and easting coordinates for the navigation channel extension points. All structural elements and pile locations are subject to minor modifications based upon final design and subsurface conditions encountered during construction.
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P:\2020\20-040 PADR\CAD\PERMITTING\PADR PERMIT BASE.DWG
SCALE: 1" = 50'
25' 50'0
NORTH
NOTES:
1. FOR GUIDE PILE SCHEMATIC AND LOCATIONS - SEE PAGE 8
2. PROPOSED FLOATING DOCKS TO BE THE SAME FOOTPRINT
AS PREVIOUSLY PERMITTED AND CONSTRUCTED
320'
225'38
TY
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36'
TYP.
40'
TYP.
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TYP.
60'
TYP.
30'
TYP. 31'TYP.
42'
46.5'
4'
TYP.
5'
10'
4'
5'
46' 40'
TYP.
FILE NUMBER: LRE-2007-00842-16
MDNR-Port Austin Harbor Breakwater Modification BY: Michigan DNR-Parks and Recreation Division Lake Huron, Port Austin, Huron County, Michigan
SHEET 7 OF 1111
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P:\2020\20-040 PADR\CAD\PERMITTING\PADR PERMIT BASE.DWG
SCALE: 1" = 50'
25' 50'0
NORTH
NOTES:
1. AVERAGE WATER LEVEL ON DAY OF SURVEY = 581.51' (IGLD85)
2. USACE OHWM = 581.5' (IGLD85), EGLE OHWM = 580.5' (IGLD85)
3. LWD = 577.5'
4. PILE LOCATIONS SUBJECT TO MINOR MOVEMENTS BASED UPON
FINAL DESIGN AND SUBSURFACE CONDITIONS
5. PILE DIAMETER NOT DRAWN TO SCALE FOR CLARITY
PG. 10
16" DIAMETER STEEL PIPE PILES
@ 40' LENGTHS (TYP.) (QTY.= 15)
FILE NUMBER: LRE-2007-00842-16
MDNR-Port Austin Harbor Breakwater Modification BY: Michigan DNR-Parks and Recreation Division
SHEET 8 OF 11
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P:\2020\20-040 PADR\CAD\PERMITTING\PADR PERMIT BASE.DWG
PROPOSED BREAKWATER EXTENSION
EXISTING USACE NAVIGATION CHANNEL LIMITS (TYP.)
PROPOSED USACE NAVIGATION CHANNEL
LIMIT EXTENSION
EXISTING USACE PROJECT
DEPTH = LWD-12' (565.5')
135'
200'
9'
A
B
C
NAVIGATION CHANNEL
PROPOSED POINTS
POINT NORTHING EASTING
A 933,548.17' 13,483,901.43' B 934,562.74' 13,483,802.31'
C 933,753.90' 13,484,182.11' D 933,860.48' 13,484,192.36'
0'
D
348' 348'
135'
SCALE: 1" = 100'
50' 100'0
NORTH
31'
FILE NUMBER: LRE-2007-00842-16
MDNR-Port Austin Harbor Breakwater Modification BY: Michigan DNR-Parks and Recreation Division Lake Huron, Port Austin, Huron County, Michigan
SHEET 9 OF 11
SCALE: 1" = 100'
50'0000000000000000000000000000000000000000000000000000
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P:\2020\20-040 PADR\CAD\PERMITTING\PADR PERMIT BASE.DWG
1 TYPICAL GUIDEPILE SECTION
SCALE: 1"=8'
LWD (577.5')
DEPTH VARIES ELEV. = 567'-573'
16" DIAMETER STEEL GUIDE PILE @ 40'
(TYP.), PRE-DRILLED AND GROUTED
PROPOSED REPLACEMENT TIMBER FLOATING DOCK
GUIDE PILE LOOP TO BE INSTALLED ON END OF
FLOATING DOCKS (TYP.)
SANDSTONE
GRAY SHALE CLAY
BOTTOM OF PILE @ ELEV. = 548.5'
LWD +11'
FILE NUMBER: LRE-2007-00842-16
MDNR-Port Austin Harbor Breakwater Modification BY: Michigan DNR-Parks and Recreation Division
SHEET 10 OF 11
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P:\2020\20-040 PADR\CAD\PERMITTING\PADR PERMIT BASE.DWG
EXISTING USACE PROJECT
DEPTH = LWD-12' (565.5')
565' 564'
563'
NOTE: MITIGATION AREA FOR THE NAVIGATION CHANNEL IMPACTS
ARE CURRENTLY AT PROJECT DEPTHS PER USACE MAINTENANCE
DREDGING SURVEY (08/30/2017) AND EDGEWATER RESOURCES
SITE BATHYMETRIC SURVEY (10/13/2020) EXCEPT IN DREDGE AREA
SHOWN. DREDGE AREA IS INTENDED TO BRING MITIGATION AREA
TO FULL PROJECT DEPTH OF LWD-12' (565.5'). ESTIMATE DREDGE
QUANTITY IS 250 CY.
DREDGE AREA
SCALE: 1" = 100'
50' 100'0
NORTH
0'
50'
FILE NUMBER: LRE-2007-00842-16
MDNR-Port Austin Harbor Breakwater Modification BY: Michigan DNR-Parks and Recreation Division Lake Huron, Port Austin, Huron County, Michigan
SHEET 11 OF 11
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