Report 2_Pavement_Rpt.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

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SUBJECT: Pavement Recommendations for Project NP-NATR 3D34, 3E15

TO MESSAGE/COMMENT FROM/DATE

R. Satasiya Project Manager

And:

I. Imam Highway Design Manager

This memorandum discusses the findings and recommendations for Project NP- NATR 3D34, 3E15. The project site is along Natchez Trace Parkway in Pontotoc and Lee Counties, Mississippi. This project consists of resurfacing the Parkway mainline from Road Inventory Program (RIP) mile post 253.24 to 268.63, which is designated as Section 3D and 3E. The project will include ramps at the Parkway intersection with U.S Routes 78 & 278 and SR 76, various Access Roads and parking/pull-offs.

The work will include an asphalt overlay, spot patching and leveling, pavement markings, raised profile edge striping at bridge approaches, and other work.

Widening of the existing roadway may be added to the project scope at locations designated by the Park. Milling will be required at bridges and parking/pull-off areas to maintain a 6-inch curb reveal. The parking areas will need handicap accessible spots added, including striping, signage, and curb ramps.

Natchez Trace Parkway (Routes 0001F and 0001G) Within the project limits, Natchez Trace Parkway is a 22-foot wide, two-lane, two-directional, major park access road with 6-foot grass shoulders. EFLHD performed a scoping site visit October 30th through November 3rd, 2017. During the site visit, the asphalt pavement was observed to be in fair to good condition, with some block cracking (< ½-inch in width) and fatigue related cracking, and localized rutting. The localized rutting and fatigue related cracking is estimated to comprise less than 2% of the roadway. There is a large skin patch near the beginning of the project alignment that causes noticeable roughness to drivers (see figure 1 below), this large patch should be removed and replaced prior to the pavement rehabilitation.

Figure 1 - Raised patch located at GPS 34.13885N, 88.82758W

Natchez Trace Parkway will be rehabilitated by placing a thin asphalt overlay over the existing surface. Prior to placing new asphalt, cracks wider than ½-inch

K. Ngozi- Bullock Pavement Engineer

Through:

M. Elias Pavement Team Leader

2/07/2019

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In addition, an asphalt wedge and level course is recommended in areas of localized rutting and curb lanes (to provide adequate curb reveal).

Approximately 2% of the roadway may require asphalt partial depth patching or wedge and level course. The overlay should be performed in accordance with the following table:

Table 1. NATR Overlay Recommendations

Layer Minimum Thickness

(in)

Comments

AC Surface Course

1-3/8

Asphalt Concrete Pavement – Gyratory Method (GACP), 0.3 to <3 x 106

ESAL’s, 3/8” Nominal Maximum Size Aggregate (NMSA), Type IV smoothness Asphalt Tack

Coat

AC Tack Coat as per Section 412 of the FP-14 Specifications

Wedge and Level

--- HACP, 0.3 to <3 ESAL’s, 3/8” NMSA

This will extend the life of the pavement section an additional 7 to 10 years.

However, reflective cracking will likely appear within 2 to 3 years.

At localized rutting locations, a thicker application of asphalt concrete, using a wedge and level technique, can be placed to bring the roadway to finished grade.

The asphalt concrete mix used for the proposed overlay can also be used as the wedge and level course.

Access Roads and Ramps There are 30 asphalt paved access roads and ramps adjacent to the project mainline that will be included in the pavement rehabilitation program. A list and description of the routes are shown in the attached table. The access roads and ramps were observed to be in fair condition with some block cracking and fatigue related distress, to include rutting and alligator cracking, that may indicate base course or subbase failures. Some cracking was observed to be wider than ½-inch. Some of the roads had minimal curb reveal and may require taper milling to prevent further loss of curb reveal.

The access roads and ramps will be rehabilitated by overlaying the existing pavement with 1-3/8-inches of asphalt concrete as outlined in Table 1 above.

Prior to placing new asphalt, cracks wider than ½-inch should be cleaned and sealed. Approximately 300 linear feet of crack sealing is estimated.

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Paved Pullouts and Parking Areas A total of 12 asphalt paved parking lots are located adjacent to the mainline (refer to the attached table for further detail). The paved areas were observed to be in fair condition with raveling, block cracking and some fatigue related distresses such as rutting and alligator cracking. Existing asphalt concrete at some parking lot curbs does not provide adequate curb reveal. Hand-work will be required during pavement rehabilitation to create and maintain a minimum 6-inch curb reveal. Some of the observed pavement cracks were > ½-inch in width and should be cleaned and sealed prior to placement of the asphalt overlay.

It is recommended that asphalt paved parking areas be rehabilitated by overlaying the existing pavement with 1-3/8-inches of asphalt concrete as outlined in Table 1 above. Prior to placing new asphalt, cracks wider than ½-inch should be cleaned and sealed. Approximately 200 linear feet of crack sealing is estimated. Asphalt pavement ruts can be filled with a wedge and level course using asphalt concrete mixes being used elsewhere on the project.

Proposed Widening of Routes 0001F/0001G At proposed roadway widening locations, the new asphalt pavement should be placed to match existing, prior to the recommended asphalt overlay. Due to the project schedule and budget, soil borings or pavement cores were not performed.

For planning purposes, the existing pavement section is estimated to consist of 6 inches of asphalt concrete over 8 inches of aggregate base, however; actual conditions may vary. Prior to the placement of aggregate, a separation and stabilization geotextile should be placed over the prepared subgrade. The recommended pavement section is as follows:

Table 2. NATR Widening

Layer Minimum Thickness

(in)

Comments

AC Course 2

Asphalt Concrete Pavement – Gyratory Method (GACP), as per Section 401 of the FP-14 Specifications, 0.3 to <3 x

106 ESAL’s, 3/8” Nominal Maximum Size Aggregate (NMSA), Type IA smoothness

Tack Coat -- AC Tack Coat as per Section 412 of the

FP-14 Specifications

AC Base Course 4 GACP, 0.3 to <3 x 106 ESAL’s, ¾”

NMSA, as per Section 401 of the FP-14 Specifications

Aggregate Base Course

Base Aggregate, Grading C or D, as per Section 301 of the FP-14 Specifications

Geotextile --- Separation and Stabilization Geotextile Class 2 – Type E, per Section 207 of

FP-14

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Attachments:

Summary of NATR 3D34, 3E15 Project Roads, Ramps and Parking Areas

Project NP-NATR 3D34, 3E15

Mainline Roadway Dimensions and Attributes PRA-NATR 3D34, 3E15

Route No Road Name FMSS # Beg MP End

MP

Route Miles

Length (ft)

Avg Width

(ft) Area (ft2)

0001F TU MOTOR ROAD 67799 253.44 268.63 15.19 80203.2 30.7 2462238

Access Roads and Paved Parking Areas Project PRA-NATR 3D34, 3E15

Routes in table below are listed by increasing mile post along the parkway’s mainline.

Route No Road Name FMSS # Route

Miles Length

(ft)

Avg Width

(ft) Area (ft2)

Begin Lat.

Long.

Access Roads:

0149 TU PONTOCOLA ACCESS

ROAD 67803 0.16 844.8 29 24499.2 34.144792 -88.822321

0150A TU CLIFF GOOKIN BLVD

ACCESS ROAD A 67805 0.15 792 27.1 21463.2 34.234851 -88.76702

0150B TU CLIFF GOOKIN BLVD

ACCESS ROAD B 104053 0.15 792 25.6 20275.2 34.237642 -88.764818

0151A TU U.S. 278 ACCESS

ROAD A 67806 0.28 1478.4 24.8 36664.32 34.250604 -88.757578

0151B TU U.S. 278 ACCESS

ROAD B 104055 0.22 1161.6 26.6 30898.56 34.253826 -88.756867

0152A

TU MCCULLOUGH

BOULEVARD ACCESS

ROAD A

67808 0.22 1161.6 23.2 26949.12 34.280249 -88.73378

0152B

TU MCCULLOUGH

BOULEVARD ACCESS

ROAD B

104074 0.19 1003.2 24.7 24779.04 34.283557 -88.731281

0153A TU U.S. 78 ACCESS ROAD

A 67809 0.4 2112 17.7 37382.4 34.297953 -88.725519

0153B TU U.S. 78 ACCESS ROAD

B 104075 0.26 1372.8 19.7 27044.16 34.299626 -88.72528

0153C TU U.S. 78 ACCESS ROAD

C 104076 0.41 2164.8 19.8 42863.04 34.302179 -88.723755

0153D TU U.S. 78 ACCESS ROAD

D 104077 0.42 2217.6 17.8 39473.28 34.298789 -88.71902

0154A TU SR 145 ACCESS ROAD

A 67810 0.46 2428.8 24.8 60234.24 34.333099 -88.707102

0154B TU SR 145 ACCESS ROAD

B 104078 0.397 2096.16 24.6 51565.536 34.334346 -88.70505

0184 TU PALMETTO ACCESS

ROAD 67818 0.18 950.4 27.2 25850.88 34.189556 -88.792827

0205 TU CHICKASAW VILLAGE

ACCESS ROAD 67820 0.29 1531.2 18.4 28174.08 34.275057 -88.74094

0206 TU OLD TOWN

OVERLOOK ACCESS ROAD 67821 0.23 1214.4 18.6 22587.84 34.302278 -88.723881

0207 TU N.E.E.D. CENTER

ROAD 67822 0.32 1689.6 20.3 34298.88 34.32977 -88.711424

0208 TU HQ ACCESS ROAD 67823 0.31 1636.8 33.2 54341.76 34.331202 -88.709769

Route No Road Name FMSS # Route

Miles Length

(ft)

Avg Width

(ft) Area (ft2)

Lat.

Long.

Access Roads:

0417 TU HQ RESIDENCE

ACCESS ROAD 67829 0.1 528 19 10032 34.329952 -88.708681

0418 TU RESIDENCE LOOP

ROAD 67830 0.46 2428.8 19.1 46390.08 34.328634 -88.709611

0419 TU RESIDENCE ROAD

(DRIVE 647) 67831 0.13 686.4 15.4 10570.56 34.326285 -88.708411

0420 TU SEWAGE TREATMENT

ACCESS ROAD 67833 0.1 528 10.1 5332.8 34.325174 -88.707318

0421 TU RESIDENCE 145 EXIT

ROAD 67834 0.13 686.4 19.8 13590.72 34.327109 -88.707843

0422 TU EAST RESIDENCE

ROAD 67835 0.38 2006.4 21.3 42736.32 34.328303 -88.705855

0423 TU NORTH RESIDENCE

ROAD 67836 0.13 686.4 17.6 12080.64 34.328286 -88.705471

0430 TU RESIDENCE WATER

TOWER ROAD 238511 0.07 369.6 12.6 4656.96 34.325528 -88.705265

0226A TU SR 76 ACCESS A 246952 0.237 1251.36 19.6 24526.656 34.210843 -88.782275

0226B TU SR 76 ACCESS B 246954 0.148 781.44 18.6 14534.784 34.214172 -88.781008

Access Roads (Manually Rated):

0415 TU BONEYARD ROAD 67826 N/A N/A N/A 10274 34.331059 -88.711073

0416 TU MAINTENANCE

ACCESS ROAD

67827 N/A N/A N/A 16267 34.33048 -88.708134

Parking:

TU CHICKASAW COUNCIL

HOUSE PARKING 67841 N/A N/A N/A 7227 34.13912 -88.8271

TU BLACK BELT

OVERLOOK PARKING 67842 N/A N/A N/A 15373 34.14948 -88.8198

TU CHICKASAW VILLAGE

PARKING 67843 N/A N/A N/A 1950 34.27792 -88.7418

0969AZ

TU OLD TOWN

OVERLOOK PARKING A 67846 N/A N/A N/A 1035 34.30405 -88.7238

0969BZ

TU OLD TOWN

OVERLOOK PARKING B 67846 N/A N/A N/A 1543 34.3043 -88.724

0969CZ

TU OLD TOWN

OVERLOOK PARKING C 67846 N/A N/A N/A 1235 34.30417 -88.7243

TU OLD TOWN LAKE

OVERLOOK PARKING 67848 N/A N/A N/A 18446 34.30213 -88.7254

0971 TU VC PARKING 67850 N/A N/A N/A 50080 34.33015 -88.7103

TU MAINTENANCE YARD

PARKING 67852 N/A N/A N/A 54908 34.33097 -88.7073

TU HEAD QUARTERS

ADMINISTRATION

PARKING 67854 N/A N/A N/A 13402 34.32966 -88.7094

TU N.E.E.D. CENTER

PARKING 67855 N/A N/A N/A 9745 34.33005 -88.7134

TU HORSE TRAIL

PARKING 238779 N/A N/A N/A 14543 34.26495 -88.7537