SER PMS FY21(1) and FY22(1)_EVER_Pavement Memo_20210921_signed.pdf

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Form FHWA-201

(Rev. 11-67)

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL HIGHWAY ADMINISTRATION

Use this form in lieu of transmittal slips within Dept. of Trans. When message comment is to be retained as file material. Do not prepare carbons. Not to be used in lieu of

Form FHWA-121 for informal correspondence. MINUTE-MEMO

SUBJECT: Projects NP SER PMS FY21(1) and NP SER PMS FY22(1) –

Pavement Recommendations

TO MESSAGE/COMMENT FROM/DATE

R. Kotadia

Project

Manager

Shoukat

Nawaz

Highway

Design

Manager

This memorandum serves to support the PS&E development for two projects. The projects consist of pavement preservation of several roadways and parking areas within the Everglades National Park (EVER) located in south Florida as follows:

• NP-SER PMS FY21(1) – EVER (including Shark Valley).

• NP-SER PMS FY22(1) – EVER Main Park Road.

The recommendations herein are based on findings from the field assessment performed by Eastern Federal Lands Highway Division (EFLHD) Pavement Team and our review of the most recent Road Inventory Program (RIP) and Highway

Pavement Management Application (HPMA) data.

BACKGROUND

The EFLHD RIP last collected the pavement condition data in EVER as part of

Cycle 6 (C6) with the Data Collection Vehicle (DCV) for roadways and manually for parking areas and some roadways. Based on C6 RIP data collected in 2019, the

Pavement Condition Ratings (PCRs) for roadways and parking areas were determined as follows:

• Pavement conditions for roadways within EVER ranged mostly from fair

(PCR of 67) to excellent (PCR of 98). Few roadways were determined to be in poor conditions with PCRs ranging from 0 to 58.

• PCRs for parking areas ranged from 30 (poor conditions) to 90 (good conditions).

Appendix A includes the C6 RIP Road Condition Summary Report for the roadways and parking areas within EVER.

The Pavements Team conducted a condition survey based on visual inspection from

November 2nd to November 5th, 2020, of all roadways and parking areas within the projects scope to assess the existing pavement conditions and determine the feasibility of pavement preservation treatments. Several roadways and parking areas were confirmed to be in fair to excellent conditions exhibiting raveling (Figure 1), oxidized asphalt (Figure 2), low severity longitudinal and transverse cracking

(Figure 3). Localized fatigue cracking (Figure 4) and block cracking (Figure 5) were observed in few locations. Few parking areas and roadways appeared to have an Open Graded Friction Course (OGFC) as surface that was observed to be raveling (Figure 1).

M. Guercio

Pavement

Engineer

Through:

M. Elias

Pavement Team

Leader

09/21/2021

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Figure 1. Raveling - EVER 0909

Figure 1. Oxidized asphalt - EVER 0920

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Figure 2. Longitudinal and transverse cracking - EVER 0223

Figure 4. Fatigue cracking - EVER 0228

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Figure 5: Block cracking - EVER 0940

PAVEMENT RECOMMENDATIONS

The Pavements Team evaluated all routes within EVER based on the visual assessment of the existing pavement conditions, C6 RIP and HPMA data for validation, to determine routes that are candidates for preservations.

We have found that several assessed routes will benefit from pavement preservation treatments. However, approximately 56% of the total number of roadways and parking areas are exhibiting conditions that are beyond preservation and warrant rehabilitation treatments, therefore were excluded for future consideration pending funding availability. Routes and parking areas that are borderline and acceptable for preservation treatment can be subject to a combination of preservation treatments

(e.g., cape seal, stress-absorbing membrane interlayer (SAMI)). Spot reconstruction

(i.e. patching) will be considered for localized poor conditions within preservable routes. Based on C6 RIP data collected in 2019, Shark Valley Visitor Center

Parking (NPS Route 0940) has a PCR of 73 (fair condition). The pavement exhibits medium to high severity longitudinal, transverse and block cracking (Figure 5).

According to the NPS representative, the parking area was paved approximately 5 years prior to the scoping trip (~2015). It is our understanding that even though the parking area is beyond preservation, the Park requests to apply a preservation treatment (cape seal) until more funding is available to rehabilitate the pavement.

Per our discussion with FHWA Florida Division and the Florida Pavement

Preservation Council (FPPC), chip seal and microsurfacing preservation treatments are commonly used by counties and local agencies. Also, it is our understanding that Florida Department of Transportation (FDOT) has a pavement preservation

Page 5 of 6 Pages program that is still in the research phase, but has used thin overlays and crack sealing and has also experimented with the ultra-thin bonded wearing course treatment.

It should be noted that EFLHD has implemented preservation treatments in the counties of St. Johns, Duval, Brevard and Volusia in the Northeast part of Florida as part of the SER PMS FY16(1), FY16(2) projects. The work included asphalt pavement patching, crack cleaning and sealing, chip seal, thin asphalt concrete pavement overlay as well as SAMI (i.e., thin overlay applied on chip seal). The work for the two projects was completed in 2016 and 2017, respectively, by a local

Florida contractor.

The following pavement preservation strategies are recommended as per the FP-14

Specifications, “Standard Specifications for Construction of Roads and Bridges on

Federal Highway Projects”:

• Micro-surfacing Type 2 - for routes and parking areas that are in good or better conditions.

• Cape Seal – apply a Chip Seal (Type 2B) on the existing pavement surface prior to placing a Micro-surfacing (Type 2) treatment for routes and parking areas that are in fair conditions, but preservable.

• Mill and Thin ACP Overlay – for routes and parking areas that have an

OGFC. Mill to depth necessary to remove the OGFC (up to 1-inch) and place a thin ACP overlay (1-3/8-inch ACP, 3/8-inch NMSA, <0.3 Million

ESAL). Tack coat must be applied on the milled surface prior to placing the thin ACP.

The existing pavements may require the following repairs prior to placing the proposed preservation treatment:

• Perform ACP Patch (Type 1, Type 2, or Type 3) as necessary, in areas exhibiting fatigue cracking, settlement, and/or potholes. Such areas should be identified by the CO. Patch areas should be performed in accordance with Section 418.

• Perform Crack Cleaning and Sealing at least a week prior to placing the preservation treatment. Crack sealing should be performed in accordance with Section 414. It is recommended to have as much time as possible, typically 6 to 12 months or one season per industry practice, between the crack sealing operation and a hot surface treatment application. That time will allow for the crack sealant to set into the cracks and cure under vehicular traffic. This will also prevent too much sealant under the surface treatment resulting in better performance. If crack sealing occurs prior to 6 months from the preservation treatment application, it is recommended to use a recessed configuration by applying the sealant so that it sets below the surface. This reduces the risk of the sealant melting and potentially

Page 6 of 6 Pages bubbling back through the subsequent hot surface treatment applications.

Crack sealing and removal of pavement markings and wheelstops will be necessary prior to placement of the surface treatment on some routes/parking areas.

A list of roadways and parking areas with the respective proposed preservation treatment and estimated patching and crack cleaning/sealing quantities is included in Appendix B.

APPENDICES

Appendix A: C6 RIP Road Condition Summary Report

Appendix B: Preservation Treatments Summary cc: Highway Design BC, TS BC w/ attachments

APPENDIX A

C6 RIP Road Condition Summary Report

3-3

3-4

3-5

3-6

3-7

3-8

3-9

3-10

3-3

3-4

3-5

3-6

APPENDIX B

Preservation Treatments Summary

NP SER PMS FY21(1) and NP SER PMS FY22(1) Preservation Treatment Summary Appendix B

Route ID Route Name Proposed Treatment ACP Patch Type 1

(SQYD)

ACP Patch Type 2

(SQYD)

ACP Patch Type 3

(SQYD)

Crack Cleaning and Sealing (ft)

EVER‐0010 MAIN PARK ROAD Micro‐surfacing

EVER‐0012 ROYAL PALM ACCESS ROAD Mill + Thin ACP Overlay 20

EVER‐0204 PA‐HAY‐OKEE ROAD Mill + Thin ACP Overlay

EVER‐0206 MAHOGANY HAMMOCK ROAD Mill + Thin ACP Overlay 10

EVER‐0212 FLAMINGO VISITOR CENTER ACCESS ROAD 1 Micro‐surfacing 49 2,500

EVER‐0213 FLAMINGO VISITOR CENTER ACCESS ROAD 2 Micro‐surfacing 500

EVER‐0214 FLAMINGO VISITOR CENTER ACCESS ROAD 3 Micro‐surfacing 500

EVER‐0215 FLAMINGO VISITOR CENTER ACCESS ROAD 4 Micro‐surfacing 500

EVER‐0220AZ FLAMINGO CAMPGROUND A LOOP ‐ SITE 1 Micro‐surfacing

EVER‐0220BZ FLAMINGO CAMPGROUND A LOOP ‐ SITES 2‐5 Micro‐surfacing 300

EVER‐0220CZ FLAMINGO CAMPGROUND A LOOP ‐ SITES 8‐13 Micro‐surfacing 450

EVER‐0220DZ FLAMINGO CAMPGROUND A LOOP ‐ SITES 15‐22 Micro‐surfacing 550

EVER‐0220EZ FLAMINGO CAMPGROUND A LOOP ‐ SITES 25‐30 Micro‐surfacing 600

EVER‐0220FZ FLAMINGO CAMPGROUND A LOOP ‐ SITES 33‐40 Micro‐surfacing 550

EVER‐0220Z FLAMINGO CAMPGROUND A LOOP ‐ PERIMETER ROAD Micro‐surfacing 10 3,000

EVER‐0223 SHARK VALLEY ACCESS ROAD Cape Seal 64 1,000

EVER‐0224 SHARK VALLEY TRAM ROAD Micro‐surfacing 56 31 33,850

EVER‐0228 LONG PINE KEY ROAD Micro‐surfacing 62

EVER‐0232AZ LONG PINE KEY CAMPGROUND LOOP A (1‐3)

Micro‐surfacing

EVER‐0232BZ LONG PINE KEY CAMPGROUND LOOP B (4‐8) 450

EVER‐0232CZ LONG PINE KEY CAMPGROUND LOOP C (9‐15) 500

EVER‐0232DZ LONG PINE KEY CAMPGROUND LOOP D (16‐22) 550

EVER‐0232EZ LONG PINE KEY CAMPGROUND LOOP E (23‐29) 200

EVER‐0232FZ LONG PINE KEY CAMPGROUND LOOP F (30‐34) 400

EVER‐0232GZ LONG PINE KEY CAMPGROUND LOOP G (35‐39) 450

EVER‐0232HZ LONG PINE KEY CAMPGROUND LOOP H (40‐45) 450

EVER‐0232IZ LONG PINE KEY CAMPGROUND LOOP I (46‐50)

EVER‐0232JZ LONG PINE KEY CAMPGROUND LOOP J (51‐55) 400

EVER‐0232KZ LONG PINE KEY CAMPGROUND LOOP K (56‐61) 450

EVER‐0232LZ LONG PINE KEY CAMPGROUND ‐ DUMPING STATION

EVER‐0232Z LONG PINE KEY CAMPGROUND PERIMETER LOOP 8,000

EVER‐0402 RESEARCH ROAD Mill + Thin ACP Overlay 78 5,000

NP SER PMS FY21(1) and NP SER PMS FY22(1) Preservation Treatment Summary Appendix B

Route ID Route Name Proposed Treatment ACP Patch Type 1

(SQYD)

ACP Patch Type 2

(SQYD)

ACP Patch Type 3

(SQYD)

Crack Cleaning and Sealing (ft)

EVER‐0403 PINE ISLAND DISTRICT SPUR ROAD Mill + Thin ACP Overlay

EVER‐0427 FLAMINGO WATER PLANT ACCESS ROAD Micro‐surfacing

EVER‐0430 MISSILE SITE LOOP ROAD Mill + Thin ACP Overlay 4

EVER‐0903 ROYAL PALM VISITOR CENTER PARKING Micro‐surfacing 4,000

EVER‐0904 BILL ROBERTSON PARKING Micro‐surfacing 88

EVER‐0905 DAN BEARD CENTER PARKING Micro‐surfacing 500

EVER‐0907AZ LONG PINE KEY PICNIC PARKING AREA A Micro‐surfacing 400

EVER‐0907BZ LONG PINE KEY PICNIC PARKING AREA B Micro‐surfacing 400

EVER‐0907CZ LONG PINE KEY PICNIC PARKING AREA C Micro‐surfacing 300

EVER‐0907DZ LONG PINE KEY PICNIC PARKING AREA D Micro‐surfacing 250

EVER‐0909 PINELANDS TURNOUT PARKING Mill + Thin ACP Overlay

EVER‐0910 PA‐HAY‐OKEE PARKING Mill + Thin ACP Overlay

EVER‐0911 MAHOGANY HAMMOCK PARKING Mill + Thin ACP Overlay

EVER‐0912 MONITORING STATION 46 ACCESS Mill + Thin ACP Overlay

EVER‐0913 PAUROTIS POND PARKING Mill + Thin ACP Overlay

EVER‐0914 NINE MILE POND PARKING Mill + Thin ACP Overlay

EVER‐0915 WEST LAKE ACCESS AND PARKING Mill + Thin ACP Overlay

EVER‐0920A FLAMINGO VISITOR CENTER PARKING A Micro‐surfacing 1,200

EVER‐0920B FLAMINGO VISITOR CENTER PARKING B Micro‐surfacing 300

EVER‐0920C FLAMINGO VISITOR CENTER PARKING C Micro‐surfacing

EVER‐0920D FLAMINGO VISITOR CENTER PARKING D Micro‐surfacing 1,500

EVER‐0920E FLAMINGO VISITOR CENTER PARKING E Micro‐surfacing 1,500

EVER‐0920F FLAMINGO VISITOR CENTER PARKING F Micro‐surfacing 3,500

EVER‐0921 FLAMINGO MARINA STORE PARKING Micro‐surfacing 34 7 2,000

EVER‐0922 WHITEWATER BAY PARKING AND RAMP Micro‐surfacing 4,500

EVER‐0940 SHARK VALLEY VISITOR CENTER PARKING Cape Seal 8,000