Silver Palms Community Development District

First Supplemental Engineer’s Report
Infrastructure Improvements

Prepared for
Silver Palms Community Development District Board of Supervisors

Miami-Dade County, Florida

Prepared by
Alvarez Engineers, Inc.

8935 NW 35 Lane, Suite 101
Miami, FL 33172
Telephone 305-640-1345
Facsimile 305-640-1346
E-Mail Address: Info@Alvarezeng.com

Accepted May 22, 2023

TABLE OF CONTENTS
Introduction	1
Purpose of this First Supplemental Engineer’s Report	1
Description of the 2023 Project and Estimated Costs	1
Estimated Costs of the 2023 Project	1
Engineer’s Certification	2
Composite Exhibit 1. Maps, Typical Lake Banks Sections, Contractor Cost Proposals	3 to 13

Introduction.

In May of 2004 the Silver Palms Community Development District, (the “District” or “CDD”) issued Special Assessment Revenue Bonds, Series 2004 in the amount of $2,015,000 to finance District-related public infrastructure consisting of roads, stormwater management, drainage, water, sewer and landscaping improvements (the “Series 2004 Project”). Such public infrastructure was described in the Engineer’s Report prepared by E.R. Brownell & Associates, Inc., dated October 22, 2003 (the “Original Engineer’s Report”). The Series 2004 Project has been completed.

As of the date of this First Supplemental Engineer’s Report, the CDD Board of Supervisors (the “Board”) intends to finance the restoration of the banks of the CDD-owned stormwater management lake, which present signs of erosion. The banks restoration project is described in more detail below and in composite Exhibit 1 attached to this report (the “2023 Project”).

The lake is located within Tract “A” of the plat of Silver Palm Lake, as recorded in Plat Book 161, Page 71 of the public records of Miami-Dade County. The tract was assigned Folio Number 30-6018-026-2020 by the County and was transferred to the CDD in December of 2003 as shown in Special Warranty Deed recorded at ORB 24901, PG 4407 in the public records of Miami-Dade County, Florida.

Purpose of this First Supplemental Engineer’s Report.

This First Supplemental Engineer’s Report is being prepared to describe the supplemental public improvements that make up the 2023 Project, and to give an estimate of their construction costs.

Description of the 2023 Project and Estimated Costs

The 2023 Project consists of filling and regrading the eroded banks along the perimeter of the lake with a combination of suitable fill material and geotextile tubes filled with sand. The tubes will be covered with an erosion-control blanket and sod on top. On the discharge side of the outfalls, the bottom of the banks will be lined with 15’ x 10’ concrete block mats just below the flowline of the pipes. (Refer to the Typical Sections in Exhibit 1).

The 2023 Project may be constructed all at once to restore the entire perimeter of the lake, or in phases, giving priority to the portions of the lake that need them most. It is more economically efficient to restore the entire lake all at once as shown in the section below.

Estimated Costs of the 2023 Project.

At the discretion of the Board, the 2023 Project may be constructed in phases (Priority 1 and Priority 2) or the entire lake at once. For the location of the portions of the lake labeled Priority 1 and 2, refer to the “Priority Plan” in composite Exhibit 1.

The estimated costs in the tables below have been rounded up to the nearest $1,000 and a 20% contingency factor has been applied to include permits, professional costs, and unforeseen conditions.

Table 1 - Estimated Costs if the 2023 Project is Constructed in Phases	
Description	Hard Costs	Contingency	Total Estimate	
Priority 1 -- (Approximately 1,282 LF of Lake Bank)	$184,000	$37,000	$221,000	
Priority 2 -- (Approximately 1,698 LF of Lake Bank)	$231,000	$47,000	$278,000	
Total	$499,000	

Table 2 - Estimated Costs if the 2023 Project is Constructed All at Once	
Description	Hard Costs	Contingency	Total Estimate	
Entire Lake -- (Approximately 2,980 LF of Lake Bank)	$400,000	$80,000	$480,000	
Total	$480,000	

Engineer’s Certification.

It is our opinion that the proposed improvements constituting the 2023 Project and their estimated costs are fair and reasonable, and that the assessable land within the District will receive a direct and special benefit equal to or greater than the cost of such improvements. We believe that the improvements can be permitted, constructed and installed at the costs described in this report.

I hereby certify that the foregoing is a true and correct copy of the First Supplemental Engineer's Report for the Silver Palms Community Development District.

Juan R. Alvarez, PE
Florida Registration No. 38522 Alvarez Engineers, Inc.

COMPOSITE EXHIBIT 1

THE 2023 PROJECT

December 06, 2022

Landshore® Enterprises, LLC
Streambank & Shoreline protection/stabilization/reclamation
Environmental Engineering, Erosion Control, Construction Management
d/b/a Erosion Restoration, LLC

Silver Palms Community Development District c/o: Alvarez Engineers, Inc., District Engineer Attn: Mr. Angel Camacho

Dear Mr. Camacho,

Please see attached our estimates for lake shoreline restoration at Silver Palms Community Development District.

Attachments include:
#4017: Estimate is for shoreline restoration of the entire lake.
#4018: Estimate is for shoreline restoration of Phase I for 1,282 liner feet.
#4019: Estimate is for shoreline restoration of Phase II for 1,698 linear feet.

Attached to this letter, you will find an aerial identifying the proposed phases, as well as typical sections illustrating our proposed methods.
Findings:
Landshore conducted a field visit on the 14th of November. We have determined that for most of the shoreline, the slope leading from the top of the slope to the waterline is very steep, ranging from 2H:1V to 3H:1V, these steep slopes are a concern and potentially a safety hazard, South Florida Water Management BMPs recommend a Side Slope factor of 4H:1V.

If you have any additional questions, require further information, or would like to discuss this estimate, do not hesitate to contact us at (941) 303-5238 or via email at info@landshore.com.

Thank you for the opportunity to provide you with these estimates. We look forward to having the pleasure of doing business with you.

Sincerely,
André van den Berg Landshore® Enterprises, LLC

118 Shamrock Blvd, Venice, Florida, 34293     Tel: (941) 303-5238     Fax: (941) 218-6113
6555 North Powerline Road, Suite 302, Fort Lauderdale, Florida, 33309  	 Tel: (954) 327-3300    Fax: (954) 533-1556
 Email: info@landshore.com

0	80	160
          Feet

© Erosion Restoration, LLC.	
REVISIONS	Erosion and Sedimentation Control Plan for SILVER PALM CDD	Landshore Enterprises, LLC  188 Triple Diamond Blvd., Ste. #A4
Environmental Engineering, Erosion	North Venice, FL 34275
Control & Construction Management	Office: 941-303-5238
d/b/a Erosion Restoration, LLC	Fax: 941-218-6113
"Your Shoreline Protection Specialists"	BY:

PIETER M. LOMBARD, P.E. FL LIC. No. 66596 ENGINEER OF RECORD	
PRIORITY PLAN	PROJECT NO.	SHEET
1	OF
1	
DATE	BY	DESCRIPTION								
11/8/2022	MR	LABEL UPDATE								
							DRAWN BY:
J.P	DATE:
11/29/2022	SCALE:
1" = 80'	

							

5

PROPERTY LINE / FENCE

  

MATCHING
TO EXISTING GRADE

PROPOSED 7.5 'CIR. SACRIFICIAL TUBE
EXISTING GROUND

PROPOSED 7.5' CIR. BASE TUBE
PROPOSED 10.0' CIR. SUPPORTING TUBE

PROPOSED TO BE COVERED WITH SOD	HWT
C125 EROSION CONTROL BLANKET

FILL IN VOIDS BEHIND TUBES WITH SUITABLE BACKFILL

EXISTING GRADE
Typical Section (PHASE 1 & 2) PROPOSED EFT
Illustration (nts).

© Erosion Restoration, LLC.		
		
REVISIONS		Landshore Enterprises, LLC Environmental Engineering,
Erosion Control & Construction Management
d/b/a Erosion Restoration, LLC

"Your Shoreline Protection Specialists"	6555 N. Powerline Road, Ste. #302 Fort Lauderdale, FL 33309
Tel: 954-327-3300, Fax: 954-533-1556
118 Shamrock Blvd.
Venice, FL 34293
Office: 941-303-5238
Fax: 941-218-6113
Web site: https://landshore.com E-mail: info@landshore.com	

SILVER PALM CDD	PROJECT NO.	SHEET
1	OF
1	
DATE	BY	DESCRIPTION								

JP	
11/29/2022	

N.T.S	

6

EXISTING HEADWALL

EXISTING GROUND

EXISTING PIPE

TIED CONCRETE BLOCK MAT SYSTEM (10 LF) SHOREFLEX™ / FLEXAMAT

HWT

EXISTING GRADE

GEO TEXTILE FILTER FABRIC 6 OZ NON WOVEN

Typical Section
PROPOSED CONCRETE BLOCK MAT
Illustration (nts).

© Erosion Restoration, LLC.

DATE

REVISIONS
BY	DESCRIPTION

Landshore Enterprises, LLC Environmental Engineering,
Erosion Control & Construction Management
d/b/a Erosion Restoration, LLC

"Your Shoreline Protection Specialists"

6555 N. Powerline Road, Ste. #302 Fort Lauderdale, FL 33309
Tel: 954-327-3300, Fax: 954-533-1556
118 Shamrock Blvd.
Venice, FL 34293
Office: 941-303-5238
Fax: 941-218-6113
Web site: https://landshore.com E-mail: info@landshore.com

SILVER PALM CDD

PROJECT NO.

JP

SHEET
1

11/29/2022

OF
1

N.T.S

7

Silver Palms Community Development District c/o: Alvarez Engineers

ESTIMATE:	4017

Attn: Mr. Angel Camacho	DATE:	12/6/2022
8935 NW 35 Lane, Suite 101, Doral, FL 33172

Project:	Shoreline Restoration for Approximately 2,980 LF of Embankment

PRODUCT DESCRIPTION	
Eco-Filter Tube (EFT®) construction uses a woven or non-woven geotextile fabric that is formed into the shape of a tube. The tube is filled with sand by direct coupling to a hydraulic dredge. The tube is designed to retain the granular fill portion of the dredge slurry, while appropriately sized openings in the geotextile allow the excess water in the slurry to permeate through the tube walls. The procedure can be implemented in both dry and underwater conditions. The tubes can be fabricated in various circumferences, which, when inflated, will form a roughly elliptical shape. The Landshore® engineered EFT® system consists of a spun bound polyester filter fabric that is sewn together to form a tube specifically calculated for particular level of service, pressure, strength, stability and safety - is placed along the edge of water on prepared terrace and filled with sand to form an erosion barrier that has the characteristics of a permeable, gravity type retaining wall.	

JOB SCOPE	
Landshore® will install Eco-Filter Tube (EFT®) as follows: One (1) layer of Submerged Tube to reaffirm the underwater shelf; One
(1) layer of Base Tube to provide stabilization and allow for land reclamation; One (1) layer of Sacrificial Tube to fill voids and for final grading to match existing slope. Importing the fill material for the tubes.
Landshore® will install a 15' x 10' concrete block mat below the existing pipe/headwall.	

ITEMIZED ESTIMATE: TIME AND MATERIALS	
Section 2,980'	Description
Mobilization / General preparation Maintenance of Traffic
Clearing and Grubbing
Installation and maintenance of stormwater pollution prevention measures
Embankment/Regular Excavation Grading and Shaping
Installation of EFT®
EFT® 7.5' Cir. Sacrificial Tube EFT® 7.5' Cir. Base Tube EFT® 10' Cir. Supporting Tube
Turf Reinforcement Mat ‐ C125 Coconut Concrete Block Erosion Control Mat Sod (St. Augustine)
Demobilization	Units	Estimated
Quantities	Total	
		EA	1		
		EA	1		
		EA	1		
		EA	1		
		CY	175		
		SF	29,797		
		LF	5,960		
		LF	2,980		
		LF	2,980		
		SY	3,311		
		SF	150		
		SF	29,797		
		EA	1		
TOTAL JOB COST			$399,148.00	
Excluding any permit fees and fees for a payment and performance bond, if any.

Landshore Enterprises, LLC ‐ 118 Shamrock Blvd., Venice, FL 34293
Tel: (941) 303‐5238  •  Fax: (954) 533‐1556  •  Email: info@landshore.com	Page 1 of 6

8

PAYMENT SCHEDULE	
Landshore® Enterprises' payment policy is as follows: 10% Booking Date
15% Mobilization Date
65% Progress work based on percentage of completion 10% Completion of project
**Invoice is due upon receipt**	

SPECIAL CONDITIONS	
Landshore® is not responsible for damage to utilities outside of easement along shoreline if as-built drawings or locations
are not provided by the Client.
Landshore® reserves the right to change this estimate unless an agreement is reached within 30 days of the original estimate date.
At this time, staging areas and site access has not been defined by Client. Therefore, any damages caused to access (curbing, sidewalk, road, etc.) are not included in this estimate.
Landshore® is not responsible for any damages to the work by any natural disaster.
In case there are any unstable submerge slopes that have not been identified by the client, Landshore® will not be held responsible for any under water land slide caused by any additional load on top of submerge slope.
Following sod installation, any sod maintenance activities, such as watering, is to be administered by Owner(s).
If there are 4" stormwater drainage pipes at shoreline edge, Landshore® will extend the pipes for no additional cost. Any other size will be determined as needed.
All information provided by Landshore® is to be shared only with the Owner(s) and those with authority to make decisions on behalf of the Owner(s). This information is by no means to be shared to solicit competing entities.
The Client is responsible to adhere to all applicable Federal, State, County, City, District and any other municipal or local laws, regulations, rules, ordinances and guidelines. Unless specifically hired to obtain all necessary permits ‐ Landshore® will not be liable for any construction or design issues, violations, fines or claims received due to nonconformance and noncompliance to standards or absence of permits (submittal of permit application does not guarantee the approval, additional services such as expediting, meetings with reviewer, etc. may be performed at an hourly rate, at the Client's request).	

This proposal is for completing the job described above, based on our evaluation. It
does not include unforeseen price increases or additional labor and materials which may be required should problems arise.

Client's Representative Signature	Date

Landshore® Enterprises Representative Signature	Date

Landshore Enterprises, LLC ‐ 118 Shamrock Blvd., Venice, FL 34293
Tel: (941) 303‐5238  •  Fax: (954) 533‐1556  •  Email: info@landshore.com	Page 2 of 6
9

Silver Palms Community Development District c/o: Alvarez Engineers

ESTIMATE:	4018

Attn: Mr. Angel Camacho	DATE:	12/6/2022
8935 NW 35 Lane, Suite 101, Doral, FL 33172

Project:	Shoreline Restoration for Approximately 1,282 LF of Embankment

PRODUCT DESCRIPTION	
Eco-Filter Tube (EFT®) construction uses a woven or non-woven geotextile fabric that is formed into the shape of a tube. The tube is filled with sand by direct coupling to a hydraulic dredge. The tube is designed to retain the granular fill portion of the dredge slurry, while appropriately sized openings in the geotextile allow the excess water in the slurry to permeate through the tube walls. The procedure can be implemented in both dry and underwater conditions. The tubes can be fabricated in various circumferences, which, when inflated, will form a roughly elliptical shape. The Landshore® engineered EFT® system consists of a spun bound polyester filter fabric that is sewn together to form a tube specifically calculated for particular level of service, pressure, strength, stability and safety - is placed along the edge of water on prepared terrace and filled with sand to form an erosion barrier that has the characteristics of a permeable, gravity type retaining wall.	

JOB SCOPE	
Landshore® will install Eco-Filter Tube (EFT®) as follows: One (1) layer of Submerged Tube to reaffirm the underwater shelf; One
(1) layer of Base Tube to provide stabilization and allow for land reclamation; One (1) layer of Sacrificial Tube to fill voids and for final grading to match existing slope. Importing the fill material for the tubes.
Landshore® will install a 15' x 10' concrete block mat below the existing pipe/headwall.	

ITEMIZED ESTIMATE: TIME AND MATERIALS	
Section PHASE I	Description
Mobilization / General preparation Maintenance of Traffic
Clearing and Grubbing
Installation and maintenance of stormwater pollution prevention measures
Embankment/Regular Excavation Grading and Shaping
Installation of EFT®
EFT® 7.5' Cir. Sacrificial Tube EFT® 7.5' Cir. Base Tube EFT® 10' Cir. Supporting Tube
Turf Reinforcement Mat ‐ C125 Coconut Concrete Block Erosion Control Mat Sod (St. Augustine)
Demobilization	Units	Estimated
Quantities	Total	
		EA	1		
		EA	1		
		EA	1		
		EA	1		
		CY	75		
		SF	12,818		
		LF	2,564		
		LF	1,282		
		LF	1,282		
		SY	1,424		
		SF	150		
		SF	12,818		
		EA	1		
TOTAL JOB COST			$183,957.00	
Excluding any permit fees and fees for a payment and performance bond, if any.

PAYMENT SCHEDULE	
Landshore® Enterprises' payment policy is as follows: 10% Booking Date
15% Mobilization Date
65% Progress work based on percentage of completion 10% Completion of project
**Invoice is due upon receipt**	

SPECIAL CONDITIONS	
Landshore® is not responsible for damage to utilities outside of easement along shoreline if as-built drawings or locations
are not provided by the Client.
Landshore® reserves the right to change this estimate unless an agreement is reached within 30 days of the original estimate date.
At this time, staging areas and site access has not been defined by Client. Therefore, any damages caused to access (curbing, sidewalk, road, etc.) are not included in this estimate.
Landshore® is not responsible for any damages to the work by any natural disaster.
In case there are any unstable submerge slopes that have not been identified by the client, Landshore® will not be held responsible for any under water land slide caused by any additional load on top of submerge slope.
Following sod installation, any sod maintenance activities, such as watering, is to be administered by Owner(s).
If there are 4" stormwater drainage pipes at shoreline edge, Landshore® will extend the pipes for no additional cost. Any other size will be determined as needed.
All information provided by Landshore® is to be shared only with the Owner(s) and those with authority to make decisions on behalf of the Owner(s). This information is by no means to be shared to solicit competing entities.
The Client is responsible to adhere to all applicable Federal, State, County, City, District and any other municipal or local laws, regulations, rules, ordinances and guidelines. Unless specifically hired to obtain all necessary permits ‐ Landshore® will not be liable for any construction or design issues, violations, fines or claims received due to nonconformance and noncompliance to standards or absence of permits (submittal of permit application does not guarantee the approval, additional services such as expediting, meetings with reviewer, etc. may be performed at an hourly rate, at the Client's request).	

This proposal is for completing the job described above, based on our evaluation. It
does not include unforeseen price increases or additional labor and materials which may be required should problems arise.

Client's Representative Signature	Date

Landshore® Enterprises Representative Signature	Date

Silver Palms Community Development District c/o: Alvarez Engineers

ESTIMATE:	4019

Attn: Mr. Angel Camacho	DATE:	12/6/2022
8935 NW 35 Lane, Suite 101, Doral, FL 33172

Project:	Shoreline Restoration for Approximately 1,698 LF of Embankment

Eco-Filter Tube (EFT®) construction uses a woven or non-woven geotextile fabric that is formed into the shape of a tube. The tube is filled with sand by direct coupling to a hydraulic dredge. The tube is designed to retain the granular fill portion of the dredge slurry, while appropriately sized openings in the geotextile allow the excess water in the slurry to permeate through the tube walls. The procedure can be implemented in both dry and underwater conditions. The tubes can be fabricated in various circumferences, which, when inflated, will form a roughly elliptical shape. The Landshore® engineered EFT® system consists of a spun bound polyester filter fabric that is sewn together to form a tube specifically calculated for particular level of service, pressure, strength, stability and safety - is placed along the edge of water on prepared terrace and filled with sand to form an erosion barrier that has the characteristics of a permeable, gravity type retaining wall.

PRODUCT DESCRIPTION

Landshore® will install Eco-Filter Tube (EFT®) as follows: One (1) layer of Submerged Tube to reaffirm the underwater shelf; One
(1) layer of Base Tube to provide stabilization and allow for land reclamation; One (1) layer of Sacrificial Tube to fill voids and for final grading to match existing slope. Importing the fill material for the tubes.

JOB SCOPE

ITEMIZED ESTIMATE: TIME AND MATERIALS	
Section	Description
PHASE II	Mobilization / General preparation Maintenance of Traffic
Clearing and Grubbing
Installation and maintenance of stormwater pollution prevention measures
Embankment/Regular Excavation Grading and Shaping
Installation of EFT®
EFT® 7.5' Cir. Sacrificial Tube EFT® 7.5' Cir. Base Tube EFT® 10' Cir. Supporting Tube
Turf Reinforcement Mat ‐ C125 Coconut
Sod (St. Augustine) Demobilization	Units	Estimated
Quantities	Total	
	EA	1		
	EA	1		
	EA	1		
	EA	1		
	CY	100		
	SF	16,979		
	LF	3,396		
	LF	1,698		
	LF	1,698		
	SY	1,887		
	SF	16,979		
	EA	1		
TOTAL JOB COST			$230,930.00	

Excluding any permit fees and fees for a payment and performance bond, if any.

PAYMENT SCHEDULE	
Landshore® Enterprises' payment policy is as follows: 10% Booking Date
15% Mobilization Date
65% Progress work based on percentage of completion 10% Completion of project
**Invoice is due upon receipt**	

SPECIAL CONDITIONS	
Landshore® is not responsible for damage to utilities outside of easement along shoreline if as-built drawings or locations
are not provided by the Client.
Landshore® reserves the right to change this estimate unless an agreement is reached within 30 days of the original estimate date.
At this time, staging areas and site access has not been defined by Client. Therefore, any damages caused to access (curbing, sidewalk, road, etc.) are not included in this estimate.
Landshore® is not responsible for any damages to the work by any natural disaster.
In case there are any unstable submerge slopes that have not been identified by the client, Landshore® will not be held responsible for any under water land slide caused by any additional load on top of submerge slope.
Following sod installation, any sod maintenance activities, such as watering, is to be administered by Owner(s).
If there are 4" stormwater drainage pipes at shoreline edge, Landshore® will extend the pipes for no additional cost. Any other size will be determined as needed.
All information provided by Landshore® is to be shared only with the Owner(s) and those with authority to make decisions on behalf of the Owner(s). This information is by no means to be shared to solicit competing entities.
The Client is responsible to adhere to all applicable Federal, State, County, City, District and any other municipal or local laws, regulations, rules, ordinances and guidelines. Unless specifically hired to obtain all necessary permits ‐ Landshore® will not be liable for any construction or design issues, violations, fines or claims received due to nonconformance and noncompliance to standards or absence of permits (submittal of permit application does not guarantee the approval, additional services such as expediting, meetings with reviewer, etc. may be performed at an hourly rate, at the Client's request).	

This proposal is for completing the job described above, based on our evaluation. It
does not include unforeseen price increases or additional labor and materials which may be required should problems arise.

Client's Representative Signature	Date

Landshore® Enterprises Representative Signature	Date