Amelia Walk
Community Development District

Engineers Report (amended for Sub-phase 4b & Phase 5)

Prepared for:

Amelia Walk Community Development District

Board of Supervisors

Prepared by:

McCranie & Associates, Inc.

Daniel I. McCranie, P.E.

July 19, 2018

INTRODUCTION

The Amelia Walk Community Development District (the "District"), encompasses approximately 563 acres within the unincorporated area of the eastern part of Nassau County, Florida. The District was established for the purpose of financing and managing the acquisition, construction, maintenance and operation of a portion of the infrastructure necessary for the community development within the District. The District is located in Parts of Sections 13, 24 and 40, all lying in Township 2 North, Range 27 East. The District is currently bounded to the north by the North Hampton single family development, to the east by vacant parcels zoned for residential use along with the Amelia National and Amelia Concourse single family developments, vacant parcels and wetlands to the south and wetlands and the North Hampton single family development to the west. Access to the District is via the Amelia Concourse roadway approximately one to two miles south of State Road 200/Highway AlA ("AlA"). The District lies approximately half way between 1-95 and the Intercoastal Waterway. Exhibit 1 represents a Vicinity Map showing the location of the development and the adjacent roads and cities. Exhibit 2 is a survey legal description of the District.

The District is located within the Hampton Lakes Planned Unit Development ("PUD"). AW Venture II, LLC, the primary landowner of the project, plans for the District to include approximately 749 single-family homes. The community also includes a community recreation area. Exhibit 3 is a site plan of the community showing its currently proposed layout and proposed phases of construction.

The project is being developed in five (5) Phases. Phase 1 was completed by the original developer, and includes substantially the entire master sewer infrastructure to accommodate the first three phases, the master infrastructure for the first three phases, and the recreation area. Phase 2 was completed in 2017 and includes the infrastructure for 134 lots. Phase 3 will include the infrastructure for 95 lots. Phase 4 is being sub-phased into Phases 4a and 4b. Sub-phase 4a will include all of the infrastructure for 109 lots and the master infrastructure (lift station and ponds) for the future Sub-phase 4b. Sub-phase 4b will include the infrastructure for 65 lots. Phase 5 will include the infrastructure for 193 lots. The timing of the infrastructure improvements for Phase 5 will be based on the rate of absorption. Each phase will be able to be developed independent of the subsequent phases.

All the offsite and onsite infrastructure and subdivision improvements have been designed to accommodate the project at build out as well as to meet Nassau County's plans for the area.

Page 2

GOVERNMENT ACTIONS

The permitting for the Phase 4 improvements outlined in this plan (including both Sub-phase 4a and Sub-phase 4b) is in the design stages and is expected to be completed in June 2018. The permitting for the Phase 5 improvements outlined in the plan is in the design stages and is expected to be completed in June 2019. Table 1 is a list of all of the development permits applied for and received to date and expected dates for those permits not yet approved. Jurisdictional wetland delineation for the entire District has been completed and accepted by the St. Johns River Water Management District (SJRWMD) and U.S. Army Corps of Engineers (ACOE). SJRWMD permits and construction plan from Nassau County are approved for Phases 1, 2 and 3. All applicable zoning, vesting and concurrency approvals are in place. Phase 1 and Phase 2 have been constructed and have been approved by Nassau County. Phase 3 is currently under construction. The Jacksonville Electric Authority (JEA) has issued a water and sewer availability letter indicating the availability of water and sewer to serve the entire community.

Table 1

Summary of Development Permits

Regulatory Agency	Type of Permit	Permit No.	Status	
Nassau County	PUD – Planned Unit	Ordinance No. 2004-	Approved	
	Development	09	Expires	
			02/09/2024	
				
St. Johns River WMD	Environmental	4-089-90044-7	Approved	
	Resource Permit –		Expires	
	Conceptual		05/05/2031	
				
St. Johns River WMD	Environmental	4-089-90044-2	Approved	
	Resource Permit –			
	Phase 1		Completed	
				
St. Johns River WMD	Environmental	4-089-90044-8	Approved	
	Resource Permit –			
	Phase 2		Completed	
St. Johns River WMD	Environmental	4-089-90044-6	Approved	
	Resource Permit –		Expires	
	Phase 3		05/04/2021	
St. Johns River WMD	Environmental	Not yet submitted		
	Resource Permit –		Expected	
	Phase 4		9-30-2018	
St. Johns River WMD	Environmental	Not yet submitted		
	Resource Permit –		Expected	
	Phase 5		6-30-2019	
Nassau County	Phase 1 Development	PUD SP05-018	Approved	
	Plans			
			Completed	
	Page 3		

Nassau County	Phase 2 Development	PUD SP06-017	Approved	
	Plans			
			Completed	
Nassau County	Phase 3 Development	PUD SP06-039	Approved	
	Plans		Expires	
			01/06/2020	
Nassau County	Phase 4 Development	Applied for		
	Plans		Expected	
			8-30-2018	
Nassau County	Phase 5 Development	Not yet submitted		
	Plans		Expected	
			6-30-2019	
U.S. Army Corps of	Wetland Impact – All	SAJ-2005-5440	Approved	
Engineers	Phases			
			Completed	
Dept. of	Potable Water System	0083071-057-DSGP	Approved	
Environmental	Construction Permit –			
Protection	Phase 1		Completed	
Dept. of	Waste Water System	0083013-062-DWC	Approved	
Environmental	Construction Permit –			
Protection	Phase 1		Completed	
Dept. of	Potable Water System	0083071-168-DSGP	Approved	
Environmental	Construction Permit –			
Protection	Phase 2		Completed	
Dept. of	Waste Water System	0003013-188-DWC	Approved	
Environmental	Construction Permit –			
Protection	Phase 2		Completed	
Dept. of	Potable Water System	0083071-169-DSGP	Approved	
Environmental	Construction Permit –		Expires	
Protection	Phase 3		02/17/2020	
Dept. of	Waste Water System	0003013-189-DWC	Approved	
Environmental	Construction Permit –		Expires	
Protection	Phase 3		02/24/2020	
Dept. of	Potable Water System			
Environmental	Construction Permit –	Applied for	Expected	
Protection	Phase 4		9-30-2018	
Dept. of	Waste Water System			
Environmental	Construction Permit –	Applied for	Expected	
Protection	Phase 4		9-30-2018	
Dept. of	Potable Water System			
Environmental	Construction Permit –	Applied for	Expected	
Protection	Phase 5		6-30-2019	
Dept. of	Waste Water System			
Environmental	Construction Permit –	Applied for	Expected	
Protection	Phase 5		6-30-2019	

It is my opinion that there are no technical reasons existing at this time which would prohibit the implementation of the plans for the District as presented and that all permits not already issued and which are necessary to effect the described improvements will be obtained during the ordinary course of development.

Page 4

STORMWATER MANAGEMENT SYSTEM

The design criteria for the District's stormwater management system are regulated by the St. Johns River Water Management District (SJRWMD). The District is located in the Nassau River drainage basin. The pre-development site runoff and water management conditions have been examined, modeled, and accepted by the SJRWMD. The existing onsite natural occurring wetlands have been delineated and verified by SJRWMD and the United States Army Corps of Engineers (ACOE).

The stormwater management plan for the District focuses on utilizing newly constructed ponds, in upland areas, for stormwater treatment in conjunction with the natural occurring wetlands. The natural occurring wetlands and lake system account for approximately 35.5% of the District's land area.

The District's objectives for the stormwater management system are:

1.	To provide stormwater quality treatment, storage, and conveyance.

2.	To adequately protect development within the District from regulatory-defined rainfall events.

3.	To maintain wetland hydro periods

4.	To insure that adverse stormwater impacts do not occur upstream or downstream as a result of the development.

5.	To satisfactorily accommodate stormwater runoff from adjacent off-site areas which naturally drain through the District.

6.	To preserve the function of the floodplain storage during the 100-year storm event.

The stormwater collection and overflow systems are a combination of curb inlets, pipe culverts, control structures and open waterways. Wetland hydro periods (normal pool and season high water elevations) will be maintained through proper design and maintenance of the overflow control structures. The stormwater management system for future subdivision development will be installed as each phase is developed. The completed phases of the stormwater management system are not dependent on any infrastructure improvements included as part of the subsequent phases of development.

WETLANDS MITIGATION

The proposed wetland mitigation consists of upland preservation in accordance with the permit requirements from the St. Johns River Water Management District and U.S. Army Corps of Engineers. The ACOE permit for the entire project expired February 2011. Impacts and mitigation for the impacts have been completed for Phase 1. Phases 2 and 3 had two very small “non-jurisdictional wetlands” that were permitted to be filled by the ACOE permit, and have been filled. All areas within wetlands that are required to be impacted for any phase of construction, have already been filled. No additional ACOE permitting is required.

Page 5

WASTEWATER COLLECTION SYSTEM

The District lies within the unincorporated area of Nassau County and the JEA provides the wastewater service. The District is in the Nassau County Regional W.W.T.P. service area. In 2005, a wastewater application for component parts of the first phase of the master utility system was submitted and approved by the JEA. The District's onsite sanitary sewer system will ultimately consist of 8" and 10" gravity sewer lines with appurtenant manholes and three (3) pumping stations. The District has installed approximately five thousand six hundred fifty feet (5,650) of 10" force main to connect with the existing JEA force main lying in the Amelia Concourse right-of-way. Phases 3, 4 and 5 will include extending the system onsite to serve the remaining phases. The wastewater service for Phase 1 and Phase 2 includes one (1) pump station along with appurtenant collection lines, manholes and force mains located within the right-of-ways. Sub-phase 4a of the wastewater collection system will include one (1) pump station along with the appurtenant collection lines, manholes and force mains located within the right-of-ways. Sub-phase 4b is expected to be constructed at the same time as sub-phase 4a, and will be served by the sub-phase 4a pump station. Phase 5 is dependent on Phase 4 being constructed. Phase 5 of the wastewater collection system will include one (1) pump station along with the appurtenant collection lines, manholes and force mains located within the right-of-ways.

POTABLE WATER DISTRIBUTION SYSTEM

The District lies within the unincorporated area of Nassau County and the JEA provides the potable water service. The District is served by a connection with the existing JEA water main in the Amelia Concourse right-of-way with water supplied by the Nassau Water Treatment Facility. The water distribution systems consists of 12”, 10”, 8”, 6”, and 4” water mains with appurtenant valves and fire hydrants. Sub-phase 4b and Phase 5 of the potable water distribution system are not dependent on any infrastructure improvements to be included as part of any future phases of development.

ROADWAYS

Primary vehicular access to the District is provided from the Amelia Concourse with Majestic Walk Boulevard providing a two (2) lane, unloaded access road with a median at the entrance. Secondary vehicular access to the District is provided with the construction of a connector road from the North Hampton PUD to Majestic Walk Boulevard providing a two (2) lane, unloaded access road. Amelia Concourse is a four-lane divided County road. The Amelia Concourse runs south from A1A along a portion of the eastern boundary of the District. The PUD allows for one access point along the Amelia Concourse. The internal road design for the District complies with the Nassau County transportation road circulation design criteria and the PUD. As part of Phase 1, Majestic Walk Boulevard was constructed which, along with the other local streets, provides access from each lot to the Amelia Concourse. Majestic Walk Boulevard is irrigated and landscaped and has underground electric, streetlights and sidewalks. The District's major entrance features and landscaping were part of the first phase of development.

By Nassau County Resolution No. 2003-109 and Resolution No. 2003-141, the Nassau County Board of County Commissioners created a municipal service benefit unit (MSBU) known as the Amelia Concourse Assessment Area “Assessment Area” for the purpose of funding the construction of Amelia Concourse roadway “Improvements” to improve access to the properties

Page 6

located within the boundaries of the Assessment Area. Improvement assessments were determined and imposed on properties within the Assessment Area beginning in November 2004 and continuing for a period of ten (10) years. It was determined in mid-2005 that the bonds issued by the MSBU did not provide sufficient funding for the Improvements. The landowners within the Assessment Area entered into a Contribution Agreement on August 19, 2005 (OR Book 1344/Pg 1493-1556) to pay their respective prorata shares of the costs and expenses above the revenue inflows from the Bonds based upon the number of ERU’s assigned to each landowner.

The Amelia Walk Community Development District has prepaid the remaining capital contribution related to the Bonds, and has prepaid the additional construction contribution.

RECREATION AREA

The recreation area is an 8.68 acre site located within the District. The recreation area consists of a clubhouse, swimming pool, parking lot, playground, open playfield, and tennis courts. The recreation area will be expanded as part of the construction of the Phase 3 infrastructure. The Phase 3 recreation area enhancements will have the capacity to serve the completed development.

ENTRANCE FEATURES, LANDSCAPING AND PERIMETER FENCING AND BUFFERING

The District has included signage and landscape features at the entrance of the District at the intersection of Majestic Walk Boulevard and Amelia Concourse. In addition, minor entrance features have been erected at each access point to the neighborhoods in the District along Majestic Walk Boulevard. Majestic Walk Boulevard has been heavily landscaped on both sides of the roadway.

PROJECT COSTS

The Summary of Estimated Project Costs detailed in Table 2 outlines the anticipated costs associated with the construction of the District’s infrastructure for Sub-phase 4b and Phase 5. The costs include professional services, roadways and sidewalks, storm sewer system, potable water system, sanitary sewer system, underground utilities, and landscaping.

Page 7

Table 2

Summary of Estimated Project Costs for Sub-phase 4b & Phase 5

Category	Sub-phase 4b	Phase 5	
Clearing, Grading & Earthwork	$	340,227	$1,566,600	
Roadway	$	440,400	$	1,145,733	
Stormwater	$	128,000	$	417,500	
Water	$	160,000	$	534,500	
Sewer	$	206,500	$	662,500	
Landscaping, Entry Monuments& Signs	$	20,000	$	70,000	
Engineering/ Permitting	$	39,200	$	118,800	
Electrical	$	50,000	$	120,000	
Contingency (20%)	$	276,865	$	927,124	
Total	$	1,661,192	$	5,562,760	
SUMMARY AND CONCLUSION					

The infrastructure, as outlined above, is necessary for the functional development of the District as required by the applicable independent unit of local government. The planning and design of the infrastructure is in accordance with current governmental regulatory requirements. The infrastructure will provide their intended function so long as the construction is in substantial compliance with the design and permits.

Items of construction in this report are based on current plan quantities for the infrastructure construction as shown on the approved constructed drawings and specifications, last revision.

It is my professional opinion that the infrastructure costs provided herein for the District improvements are reasonable to complete the construction of the infrastructure described herein and that these infrastructure improvements will benefit and add value to the District. All such infrastructure costs are public improvements or community facilities as set forth in Section 190.012 (1) and (2) of the Florida Statutes.

The estimate of the master infrastructure construction costs is composed of estimates or established contractual amounts and is not a guaranteed maximum price. The estimated cost is based on unit prices currently being experienced for ongoing and similar items of work in Nassau County and quantities as represented on the construction plans. The labor market, future costs of

Page 8

equipment and materials, and the actual construction process are all beyond my control.

Due to this inherent opportunity for fluctuation in cost, the total final cost may be more or less than this estimate.

The professional service for establishing the opinion of estimated construction costs are consistent with the degree of care and skill exercised by members of the same profession under similar circumstances.

Page 9

Appendix A

Description

Exhibit 1.	Vicinity Map
Exhibit 2.	District Legal Boundary and Description
Exhibit 3.	Subdivision Map

Page 10

CHIPLEY	hortN		
10			
95			
75		
TALLAHASSEE	10		JACKSONVILLE			
	FORT WALTON							
	PENSACOLA				
		BEACH		295			
			LAKE					
						
PANAMA	CITY			
	CITY				ST AUGUSTINE			

GAINESVILLE		
OCALA	DAYTONA BEACH		
DELAND	4			
				
LOCATION		
ORLANDO	BEE LINE			
			MELBOURNE -			
	NEW PORT RICHEY	EXPRESSWAY				
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BRADENTON	95		
WEST PALM		
	FT MYERS	BEACH		
				
75		
NAPLES	FT LAUDERDALE			
75				
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12	40		9	43	40				T.	a		STATE PARK					
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Vicinity Map	Exhibit 1		
			
Amelia Walk, CDD