Pavement Recommendations.pdf

Page 1 of 2 Pages

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: Project NP-BLRI PVT PRES FY22(1) – Pavement Recommendations

TO MESSAGE/COMMENT FROM/DATE

S. Foronda Project Manager

S. Nawaz Highway Design Manager

This memorandum serves to support the PS&E development for Project NP-BLRI PVT PRES FY22(1). The project consists of pavement preservation of several routes including roadways, ramps, parking areas and overlooks within the Blue Ridge Parkway located in North Carolina from MP 394.7 to MP 465.0. The Blue Ridge Parkway mainline is not part of the scope of work for this project.

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 for the Blue Ridge Parkway as part of Cycle 4 (C4) and C5 with the Data Collection Vehicle (DCV) for roadways and ramps and manually for parking areas and overlooks. Based on C4 (collected in 2009) and C5 (collected in 2013) RIP data, the Pavement Condition Ratings (PCRs) for the routes, parking areas and overlooks within the scope of work range mostly from 73 (fair conditions) to 93 (good conditions). NPS Routes BLRI- 0102Z, BLRI-0103, BLRI-0105, BLRI-0107 were determined to be in excellent conditions with PCRs of 97 and 98. NPS Routes BLRI-0420, BLRI-1106C, BLRI- 1122, BLRI-1179 and BLRI-1278 were determined to be in poor conditions with PCR of 45.

PAVEMENT CONDITION ASSESSMENT

The Pavements Team conducted a condition survey (i.e., visual inspection) from November 30th to December 2nd, 2021, of all roadways and parking areas within the scope of work to assess the existing pavement conditions and determine the feasibility of pavement preservation treatments. Appendix B includes photographs of typical pavement conditions for preservable routes (Figures 1 and 2) and for routes considered beyond preservation (Figures 3 through 8).

A total of 115 routes were assessed. Approximately 43% of these routes (49 routes) were observed to be in poor conditions, thus beyond preservation. These routes exhibited medium to high-severity fatigue cracking, block cracking, transverse cracking, longitudinal cracking, edge cracking and raveling. Approximately 57% of the routes (66 routes) were overall observed to be in fair to good conditions with some routes exhibiting low to medium-severity longitudinal, transverse and block cracking and raveling. Roadways and parking areas exhibiting severe and extensive distresses (approximately 43% of the total number of routes) were excluded from the scope of work.

PAVEMENT RECOMMENDATIONS

The Pavements Team evaluated all routes within the scope of work based on the visual assessment of the existing pavement conditions, C4 and C5 RIP data to determine routes that are candidates for preservations.

M. Guercio Pavement Engineer

Through:

M. Elias Pavement Team Leader

05/23/2022

Page 2 of 2 Pages

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

TO MESSAGE/COMMENT FROM/DATE

We have found that most the assessed routes will benefit from pavement preservation treatments. However, several routes (approximately 43% of the total number of roadways, ramps, parking areas and overlooks) are exhibiting conditions that are beyond preservation and warrant rehabilitation treatments, therefore were excluded for future consideration pending funding availability. Spot reconstruction (i.e. patching), crack cleaning and sealing will be considered for localized poor conditions within preservable routes.

The following pavement preservation strategy and repairs (prior to placing the proposed preservation treatment) are recommended as per the FP-14 Specifications, “Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects”:

• Thin Lift ACP (3/4-inch ACP overlay, 4.75mm Nominal Maximum Size Aggregate (NMSA)) for routes that are in good or better conditions Tack coat must be applied on the existing pavement surface prior to placing the thin lift ACP overlay.

• Perform ACP Patch (Type 1 or Type 2,) 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 Sealing and Filling at least a week prior to placing the preservation treatment. Crack sealing (crack width ¼-inch to less than -inch) and filling (crack width greater than 1-inch) 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 bubbling back through the subsequent hot surface treatment applications.

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

APPENDICES

Appendix A: Pavement Assessment and Preservation Treatments Summary Appendix B: Photographs cc: Construction Branch, Highway Design Branch, Programs and Planning Branch

NP-BLRI PVT PRES FY22(1) Appendix A Preservation Treatment Summary

Route ID Route Name PVT Pres (Y/N)

Crack sealing and filling (ft)

ACP Patch Type 1

(SQYD)

ACP Patch Type 2

(SQYD)

BLRI-0100 HEINTOOGA SPUR ROAD N - - -

BLRI-0101Z ACCESS RAMP TO U.S. HIGHWAY 19 SOUTH N - - -

BLRI-0102Z ACCESS RAMP TO U.S. HIGHWAY 19 NORTH Y 150 - -

BLRI-0103 ACCESS RAMP TO U.S. HIGHWAY 23 AND U.S. 74 Y 270 - -

BLRI-0104 ACCESS RAMP TO NC STATE HIGHWAY 215 N - - -

BLRI-0105 ACCESS RAMP TO U.S. HIGHWAY 276 Y 200 - -

BLRI-0107 ACCESS RAMP TO NC STATE HIGHWAY 191 Y 250 - -

BLRI-0200 WATERROCK KNOB OVERLOOK ACCESS ROAD Y 750 - -

BLRI-0201 ORCHARDS OVERLOOK ACCESS ROAD Y 260 - -

BLRI-0202AZ MOUNT PISGAH CAMPGROUND LOOP A N - - -

BLRI-0202BZ MOUNT PISGAH CAMPGROUND LOOP B N - - -

BLRI-0202CZ MOUNT PISGAH CAMPGROUND LOOP C N - - -

BLRI-0202DZ MOUNT PISGAH CAMPGROUND LOOP D N 150 - -

BLRI-0202Z MOUNT PISGAH CAMPGROUND ACCESS ROAD Y 150 - -

BLRI-0203 ROAD TO BUCK SPRINGS PARKING AREA N - - -

BLRI-0420 MOUNT PISGAH PICNIC SERVICE ROAD N - - -

BLRI-0422 MOUNT PISGAH TREATMENT PLANT ROAD Y - - -

BLRI-1093 FRENCH BROAD RIVER OVERLOOK Y - - -

BLRI-1094 WALNUT COVE OVERLOOK Y 750 - -

BLRI-1095 SLEEPY GAP OVERLOOK Y 600 - -

BLRI-1096 CHESTNUT COVE OVERLOOK Y 300 - -

BLRI-1097 BAD FORK VALLEY OVERLOOK Y 250 - -

BLRI-1098 WASH CREEK VALLEY OVERLOOK N - - -

BLRI-1099 BEAVER DAM GAP OVERLOOK Y 150 - -

BLRI-1100 STONY BALD OVERLOOK Y 350 - 25

BLRI-1101 BIG RIDGE OVERLOOK N - - -

BLRI-1102 HOMINY VALLEY OVERLOOK N - - -

BLRI-1103 MILLS RIVER VALLEY OVERLOOK Y 160 - 35

BLRI-1104 MOUNT PISGAH PICNIC PARKING N - - -

BLRI-1105 FLAT LAUREL GAP OVERLOOK PARKING N - - -

BLRI-1106A MOUNT PISGAH CAMP STORE AND LODGE PARKING N - - -

BLRI-1106C MOUNT PISGAH RESTAURANT SERVICE ROAD Y 100 - -

BLRI-1107 MOUNT PISGAH DUMP STATION AND RESIDENCE ACCESS N - - -

Crack sealing and filling (ft)

ACP Patch Type 1

(SQYD)

ACP Patch Type 2

(SQYD)

BLRI-1108 FUNNEL TOP OVERLOOK N - - -

BLRI-1109 PINK BEDS OVERLOOK Y 150 3 -

BLRI-1110 CRADLE OF FORESTRY OVERLOOK Y 250 - -

BLRI-1111 WAGON ROAD GAP MAINTENANCE YARD N - - -

BLRI-1112 COLD MOUNTAIN OVERLOOK N - - -

BLRI-1113 WAGON ROAD GAP PARKING AREA N - - -

BLRI-1114 POUNDING MILL OVERLOOK N - - -

BLRI-1115 CHERRY COVE OVERLOOK N - - -

BLRI-1116 LOG HOLLOW OVERLOOK N - - -

BLRI-1117 LOOKING GLASS ROCK OVERLOOK N - - -

BLRI-1118 EAST FORK OVERLOOK N - - -

BLRI-1119 GRAVEYARD FIELDS OVERLOOK Y 650 - -

BLRI-1120 JOHN ROCK OVERLOOK N - - -

BLRI-1121 FETTERBUSH OVERLOOK N - - -

BLRI-1122 DEVIL'S COURTHOUSE OVERLOOK N - - -

BLRI-1123 MOUNT HARDY OVERLOOK N - - -

BLRI-1124 COURTHOUSE VALLEY OVERLOOK Y 1,200 - -

BLRI-1125 HERRIN KNOB OVERLOOK Y 20 - -

BLRI-1126 WOLF MOUNTAIN OVERLOOK Y 20 - -

BLRI-1127 ROUGH BUTT BALD OVERLOOK Y 250 - -

BLRI-1128 BEAR PEN GAP OVERLOOK Y 220 - -

BLRI-1129 SPOT KNOB OVERLOOK Y 650 - -

BLRI-1130 CANEY FORK OVERLOOK Y 250 3 -

BLRI-1131 BEARTRAP GAP OVERLOOK Y 150 - -

BLRI-1132 BEARTRAIL RIDGE OVERLOOK Y 650 - 8

BLRI-1133 COWEE MOUNTAINS OVERLOOK Y 350 3 -

BLRI-1134 HAYWOOD-JACKSON OVERLOOK Y 500 - -

BLRI-1135 RICHLAND BALSAM OVERLOOK Y 1,200 6 -

BLRI-1136 LONE BALD OVERLOOK Y 100 - -

BLRI-1137 ROY TAYLOR FOREST OVERLOOK Y 200 - -

BLRI-1138 DOUBLETOP MOUNTAIN OVERLOOK Y 150 - -

BLRI-1139 LICKLOG GAP OVERLOOK Y 250 - -

BLRI-1140 GRASSY RIDGE MINE OVERLOOK Y 300 - -

Crack sealing and filling (ft)

ACP Patch Type 1

(SQYD)

ACP Patch Type 2

(SQYD)

BLRI-1141 STEESTACHEE OVERLOOK Y 25 - -

BLRI-1142 COVE FIELD RIDGE OVERLOOK Y 120 - -

BLRI-1143 VILLAGE OF SAUNOOK OVERLOOK Y 180 16 -

BLRI-1144 WAYNESVILLE OVERLOOK Y 80 - -

BLRI-1145 STANDING ROCK OVERLOOK Y 150 - -

BLRI-1146 RABB KNOB OVERLOOK Y 450 - -

BLRI-1147 BALSAM GAP OVERLOOK AT MP 442.2 Y 1,200 - -

BLRI-1148 BALSAM GAP MAINTENANCE YARD PARKING N - - -

BLRI-1149 THE ORCHARDS OVERLOOK Y 120 - -

BLRI-1150 MOUNT LYN LOWRY OVERLOOK Y 320 - -

BLRI-1151 WOODFIN VALLEY OVERLOOK Y 20 - 8

BLRI-1152 WOODFIN CASCADES OVERLOOK Y 30 - -

BLRI-1153 WESNER BALD OVERLOOK N 50 - -

BLRI-1154 SCOTT CREEK OVERLOOK Y 50 - 12

BLRI-1155 FORK RIDGE OVERLOOK Y 100 - -

BLRI-1156 YELLOW FACE OVERLOOK Y 15 - -

BLRI-1157 BROWNING KNOB OVERLOOK Y 160 - -

BLRI-1158AZ WATER ROCK KNOB OVERLOOK PARKING A Y 160 - -

BLRI-1158BZ WATER ROCK KNOB OVERLOOK PARKING B Y 140 - -

BLRI-1158CZ WATER ROCK KNOB OVERLOOK PARKING C Y 60 - -

BLRI-1158DZ WATER ROCK KNOB OVERLOOK PARKING D Y 180 - -

BLRI-1158EZ WATER ROCK KNOB OVERLOOK PARKING E Y 150 - -

BLRI-1159 CRANBERRY RIDGE OVERLOOK Y 25 - -

BLRI-1160 WOOLYBACK OVERLOOK N - - -

BLRI-1161 HORNBUCKLE VALLEY OVERLOOK Y 120 - 20

BLRI-1162 THUNDER STRUCK RIDGE OVERLOOK N - - -

BLRI-1163 FED COVE OVERLOOK Y 40 - -

BLRI-1164 SOCO GAP OVERLOOK Y 80 - -

BLRI-1166 JONATHAN CREEK OVERLOOK N - - -

BLRI-1167 PLOTT BALSAM OVERLOOK N - - -

BLRI-1168 MILE HIGH OVERLOOK N - - -

BLRI-1169 MAGGIE VALLEY OVERLOOK N - - -

BLRI-1170 LAKE JUNALUSKA OVERLOOK N - - -

Crack sealing and filling (ft)

ACP Patch Type 1

(SQYD)

ACP Patch Type 2

(SQYD)

BLRI-1171 HORSETROUGH RIDGE OVERLOOK N - - -

BLRI-1172 BLACK CAMP GAP OVERLOOK Y 60 - -

BLRI-1173 LICKSTONE RIDGE OVERLOOK N - - -

BLRI-1174 BUNCHES BALD OVERLOOK Y - - -

BLRI-1175 JENKINS RIDGE OVERLOOK N - - -

BLRI-1176 BIG WITCH OVERLOOK Y 400 - -

BLRI-1177 THOMAS DIVIDE OVERLOOK Y 150 - -

BLRI-1178AZ BALLHOOT SCAR OVERLOOK PARKING A N - - -

BLRI-1178BZ BALLHOOT SCAR OVERLOOK PARKING B N - - -

BLRI-1179 RAVEN FORK OVERLOOK N - - -

BLRI-1180 OCONALUFTEE OVERLOOK Y 250 - -

BLRI-1181AZ BUCK SPRINGS OVERLOOK PARKING AREA A N - - -

BLRI-1181BZ BUCK SPRINGS OVERLOOK PARKING AREA B N - - -

BLRI-1182Z MOUNT PISGAH PARKING AREA N - - -

BLRI-1190 SOCO GAP MAINTENANCE PARKING N - - -

BLRI-1278 DAVEY / SOCO HOUSE PARKING N - - -

TOTALS = 17,235 31 108

NP-BLRI PVT PRES FY22(1) Appendix B - Photographs

Figure 1. BLRI-0103 - good condition (preservation candidate)

Figure 2. BLRI-1132 - fair conditions (preservation candidate)

Figure 3. BLRI-0100 - fatigue cracking

Figure 4. BLRI-0104 - block cracking

Figure 5. BLRI-0202AZ - transverse cracking

Figure 6. BLRI-1105 - longitudinal cracking

Figure 7. BLRI-1107 - edge cracking

Figure 8. BLRI-1167 – raveling