Amendment 0001 - NP BLRI 2F27_2F28.pdf

(x)

693C7322B000001 x x

1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE

RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR

OFFER. If by virtue of this amendment you desire to change an offer already submitted , such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

ASHBURN VA 20147

ATTN:CONSTRUCTION

693C73

SUITE E2-3-300

QUANTUM PARK, 22001 LOUDOUN COUNTY PKWY

EASTERN FEDERAL LANDS HIGHWAY DIVISION

FEDERAL HIGHWAY ADMINISTRATION

ASHBURN VA 20147

ATTN:ACQUISITIONS

693C73

SUITE E2-3-300

QUANTUM PARK, 22001 LOUDOUN COUNTY PKWY

EASTERN FEDERAL LANDS HIGHWAY DIVISION

FEDERAL HIGHWAY ADMINISTRATION

See Block 1410/27/20210001

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following methods: (a) By completing

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

10/01/2021

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not is required to sign this document and return __________________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

Project NP-BLRI 2F27, 2F28

The purpose of this Amendment is to:

1) Provide a summary of responses to questions/clarifications asked by potential bidders.

2) Provide revision to plan sheets.

3) Provide government furnished information soil boring logs.

4) Provide government furnished information NEPA document.

Continued ...

15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect .

ITEM NO. SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

NAME OF OFFEROR OR CONTRACTOR

2 28

CONTINUATION SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGE OF

(A) (B) (C) (D) (E) (F)

693C7322B000001/0001

5) Bid Opening date of November 2, 2021 at 2:00 p.m. EST remains unchanged.

NSN 7540-01-152-8067 OPTIONAL FORM 336 (4-86)

Sponsored by GSA

FAR (48 CFR) 53.110

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL HIGHWAY ADMINISTRATION

EASTERN FEDERAL LANDS HIGHWAY DIVISION

Amendment No. 0001 Project NP-BLRI 2F27, 2F28

BLUE RIDGE PARKWAY

Solicitation: 693C73-22-B-000001

The purpose of this Amendment is to:

1) Provide a summary of responses to questions/clarifications asked by potential bidders.

2) Provide revision to plan sheets.

3) Provide government furnished information soil boring logs.

4) Provide government furnished information NEPA document.

5) Bid Opening date of November 2, 2021 at 2:00 p.m. EST remains unchanged.

Questions / Clarifications

The following questions and issues were submitted to EFLHD at eflhd.conracts@dot.gov. The Government response or clarification is provided. The Government’s direct response to the sender may also have been updated below for better clarity.

1. For Schedule B, what is the anticipated/assumed bond capacity of the rock bolts? Can a smaller drill hole diameter that is typical for #8 rock bolts (3 to 3.5” diameter drill hole) be utilized if pullout capacity can be confirmed with field verification or proof tests?

Response: We recommend that a minimum of 16 kips which is approximately 20 percent of the anchor design strength be post-tensioned and locked in. Anchors should have a design load of 80 kips. Refer to Section 260 of FP for the construction and submittals requirements for the Rock Bolts.

2. Is there geotechnical information available for Site C? If not, what information was used to determine estimated bedrock?

Response: Geotech soil borings will be provided as part of amendment.

3. Are there existing Geotech reports available for the 3 work area’s encompassing the project locations? Site observations by our engineer who has completed work along the Parkway raised the concerns of the potential presence of bedrock.

Response: Schedule A: See answers to previous questions. The borings were done in the vicinity of the landslide. Bidder must understand the borings attached might not represent the entire site condition and therefore must exercise caution when using the information presented in the boring logs.

file://fhfl15fileserve.flhd.fhwa.dot.gov/data/PROJECTS/natr/1e10/Proj_Dev/Eng_Coord/3Advertisement/Amendments/Amendment%201/Final%20Documents/eflhd.conracts@dot.gov

Response: Schedule B: No Geotech exploration was done.

Response: Schedule C: Geotech exploration for MP 323.25 were done in 2004.

4. Does the government plan to conduct such investigations? Bedrock could significantly impact the budget and period of performance for this project. Would it be prudent for the Govt. to consider such conditions existing given cursory observations? Furthermore, an allowance for a pre-defined quantity of such excavation could be considered since such excavation would clearly be expensive and time consuming.

Response: See answers to previous questions. The presences of bedrock that might require excavation is unlikely based on the boring logs.

5. Are 3rd party inspections required for the installation of rock bolts, anchor’s, etc.?

Response: Refer to Section 256 and 260 of the FP for Anchor and Rock Bolt installation and testing requirement.

6. Are the cross sections on Drawing pages T01-T26 estimated, or, actual?

Response: Cross section were developed from survey obtain at the site.

7. Is there a Phase I Environmental report addressing items, such as protected flora and fauna, species?

Response: NEPA Categorical Exclusion document will be included as part of the amendment.

8. Where will be the designated site for mobile office, latrine, staging/lay-down areas for each location? Since the entire road will be closed for Schedule A and B, can we use any of the road surface for material or equipment staging?

Response: Refer to Subsection 157.07(d) of the Special Contract Requirement for staging location.

9. What about unstable soils? Should allowances be considered for a predefined quantity?

Response: Refer to Subsection 2014.16(a) of the FP-14 for Roadway excavation.

Schedule B

10. Plan view shows 1548 SQYD of mesh but “Schedule” quantity table says 2200 SQYD, which is correct?

Response: The correct quantity for Anchored Wired Mesh System is the rounded total shown on Plan Sheet C05 of 2200 SQYD.

11. For the #8 all-thread bar, may a diameter of 3” be utilized that is more standard for rock bolt installation? Is there a reason for the 5.5” diameter drillhole? Is there a specified pullout capacity? The pullout capacity at 3” diameter can be confirmed with field testing as needed. A diameter greater than 5” is hard to achieve in rock and puts a great amount of torque and stress on equipment which often leads to much higher instances of rock fracture/breakage and also equipment damage.

Response: See answers to previous questions

Schedule C

12. Are there as-builts available from Schedule 3/location #3 at MM 323.25 from the original slope repair/stabilization? Is there any geotechnical information or previous drill logs from the existing anchors available for the site? How was the depth to bedrock determined?

Response: See answers to previous questions

13. Could the existing anchors and anchor blocks be left in place? Although they have shifted and moved over the years, it’s possible they’re contributing to the overall slide stability, removal could further release the slide. Has this been considered/investigated?

The import of 775 CUYD unclassified borrow could bury the anchor blocks.

Response: We believe that several anchor blocks are not functioning as intended.

Several of the blocks don’t have contact with the ground; however, the bidders must do their due diligence and perform necessary analysis to confirm stability during construction.

14. How does the government plan to mobilize the equipment at MM 323.25? Mobilizing equipment within the limits of the disturbance doesn’t seem practicable. However, there is an old overgrown logging road/trail (east of the slide), that is outside of the slide area and was possibly used during the original repairs that is adjacent to, just above and outside the “limits of disturbance”. Would it be possible to utilize that trail?

Response: Refer to Section 151 of the FP for Mobilization.

Plan Sheet changes

1. Revision to Plan sheet D03 updated the quantity for anchored wired mesh system.

2. Revision to Plan sheet S05 added Note 4.

10H

A L F S I L T

E D

E L E

V .0

TBAR

E L E

V .9

TBAR

TBAR

90 3390

95 3395

S03°02'38" E

.7

P T

N

NOTES:

Protect existing guardrail during construction. 4.

Furnish 10-foot rock bolt for anchored wired mesh system. See Typical Section.3.

See Detail E260-A for rock bolts.2.

See Sheet C06 for rock bolt locations and lengths. Confirm final location with the CO.1.

Rock bolts bearing plate (typ.)

Rock bolts (typ.)

Limits of anchored wired mesh system

BEGIN SCHEDULE B

END SCHEDULE B

E 1261475

N 909368

STA. 203+90

E 11261486

N 909159

STA. 206+00

Sta. 205+15

Existing Inlet to remain.

See Detail E608-05

Sta. 203+90 to Sta. 206+00

Paved Waterway, Type 5 (Asphalt)

Remove and replace

See Typical Section

Sta. 203+90 to Sta. 206+00

Mill & Overlay

See Typical Section.

Install 2027 SQYD anchored wired mesh system

See Notes 1, 2 & 3.

Install rock bolt (typ.)

See Notes 1 & 2.

Install rock bolt (typ.)

L = 350.25'

T = 176.38'

R = 1,200.00'

Δ = 16°43'24" (LT)

PI 201+99.89

See Note 4.

Sta. 204+31 to Sta. 206+00 Existing guardrail to remain.

NO. DATE BY REVISIONS

OFFICE OF FEDERAL LANDS HIGHWAY

FEDERAL HIGHWAY ADMINISTRATION

U.S. DEPARTMENT OF TRANSPORTATION BLUE RIDGE PARKWAY

CONSTRUCTION PLAN

SCHEDULE B - MP 277.1

SCALE IN FEET

0 20 40

AMENDMENT NO. 1 1

1 10/26/21MWT AMD #1 - Updated quantity to 2027 SQYD

:0

M

O c to b e r

S h e e t

D

M P

.1

S c h B

P la n

C

U s e rs \m ic h a e l.

to o m e r\

D e s k to p \C u rr e n t W o rk

\B L

R I

F

\C A

D D

\M P

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S c h e d u le

B \D

-B L

R I2

F

-2

F

P L

N -2

-A m e n d m e n t.

d g n

STATE PROJECT

NUMBER

SHEET

NC NP-BLRI 2F27, 2F28 D03

NPS Drwg No. 601/173627 NPS PMIS No. 242360

NOTES:

Length varies (See Typical Sections & plans) recessed into rock

Install bearing plate shown in plans (See Typical Sections)

Anchored Wired Mesh System, where

Face of rock slope

Grout tube specifications per bar manufacturer

Heavy duty hex nut as specifications manufacturer

Washers as per bar

Min. 12" x 12" x 1"

Bearing plate, Trumpet

PVC centralizer as per bar manufacturer specifications

Cement grout 4 KSI Min. 28 days compressive strength

Duct-tape grout tube to bar (typ.)

#8 All-threaded bar (Fy = 75 KSI)

5.5" O Min. drillhole poly-corrugated tubing

Non-shrink grout inside

Poly-corrugated tubing load is 80 kips.

approximately 20 percent of the anchor design load. Anchors design

Post-tension and lock the rock bolts to a minimum of 16 kips which is 4.

Galvanize anchored wire mesh according to ASTM A153.3.

bolts according to Subsection 260.07.

Powder coat bearing plates, hex nuts, and exposed portions of rock 2.

rock bolt according to Subsection 204.13(e).

Scale rock slopes as directed by the CO prior to installing 1.

for exposed bolt/plate

Provide corrosion protection

ROCK BOLTS

E260-A

NO SCALE

1AMENDMENT NO. 1

AMD #1 - Added Note #4.MWT10/26/211

NO. DATE BY REVISIONS

:1

M

O c to b e r

S H

E E

T

S

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A

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A d e ta il A m e n d m e n t_

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DETAIL

OFFICE OF FEDERAL LANDS HIGHWAY

FEDERAL HIGHWAY ADMINISTRATION

U.S. DEPARTMENT OF TRANSPORTATION

EFLHD DETAIL

STATE PROJECT

NUMBER

SHEET

NC NP-BLRI 2F27, 2F28 S05

NPS Drwg No. 601/173627 NPS PMIS No. 242360

(Continued)

(Continued)

1.6

0.9

1.6

1.7

1.3

0.1

0.4

0.8

0.1

1.7

1.4

1.1

1.7

1.4

15-15-14-12

2-5-5-7

7-21-41-26

34-48-19-9

7-5-7-6

0-0-2-2

2-4-1-1

1-2-2-3

0-1-1-1

1-1-2-6

6-16-8-3

4-7-8-11

6-8-7-9

1-5-6-6

Asphalt Pavement

Base aggregate

Fill, loose to very dense, tan-brown, moist, non plastic.

Silty SAND with Gravel (SM), very loose, tan, moist, non plastic. A-1-b

Silty SAND with Gravel (SM), medium dense, brown, moist, non plastic. A-1-b

J-1

J-2

J-3

J-4

J-5

J-6

J-7

J-8

J-9

J-10

J-11

J-12

J-13

J-14

J-15

0.6 1.0

12.0

25.0

34.0

Project Location:

Encountered at:

After

Northing: 910478.33 Easting: 1262154.18

Caved at:

Hammer Drop:

Rock Core (RQD in %) hrs

Remarks:

Auger Cuttings

G ra ph ic

L og

NP BLRI 2F28

Density, Color, Plasticity, Size, Proportions, Moisture

D ep th S ca le ft)

Inspector:

MATERIAL DESCRIPTION

Boring No.:

Groundwater Depth:

Sample Types:

BORING LOG

8/22/18 G. Moody

D. HutchinsOperator:

T yp e

Weather:

SAMPLE

Plastic Limit Standard Penetration Test Data

Project Datum:

(Blows / ft)

3239.9 ft

Undisturbed (UD)

8/22/18

R ec

(f t)

Project Name:

Surface Elevation:

47.5 ft

Boring Location:

La ye r

D ep th ft)

Boring Began:

FEDERAL HIGHWAY ADMINISTRATION

EASTERN FEDERAL LANDS HIGHWAY DIVISION

Liquid Limit

SPT

U. S. DEPARTMENT OF TRANSPORTATION

At Completion:

Completed:

N o.

Blue Ridge Parkway, MP 276.8, Deep Gap, NC

E le va tio n (f ee t)

3 3/4" Boring Method:

Rock Core Diam:

Vane Shear

30 in.

140 lbs/Automatic

Penetrometer (PP in tsf)

Water Content %

Hole Diameter:

NAD83

HSA

BH18-01

Hammer Wt. & Type:

Sunny, 73°F

BLRI MP 276.8

S P

T B lo w s pe r in

P P

B O

R

IN

G L

O G

/4

/1

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P R

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A C

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P J

3239.3 3238.9

3227.9

3214.9

3205.9

Sheet: 1 of 2

DRAFT

1.2

1.5

0.7

1.3

1.7

1.4

4-8-11-14

12-13-45-50/4"

14-12-18-20

12-8-11-10

4-15-8-5

17-8-11-18

Silty SAND, medium dense, brown-white, moist, non plastic. A-2-4(0) (Continued)

Wet (38' to 40')

Bottom of Boring: 50.0 ft

J-15

J-16

J-17

J-18

J-19

J-20

38.0

50.0

Project Location:

Encountered at:

After

Northing: 910478.33 Easting: 1262154.18

Caved at:

Hammer Drop:

Rock Core (RQD in %) hrs

Remarks:

Auger Cuttings

G ra ph ic

L og

NP BLRI 2F28

Density, Color, Plasticity, Size, Proportions, Moisture

D ep th S ca le ft)

Inspector:

MATERIAL DESCRIPTION

Boring No.:

Groundwater Depth:

Sample Types:

BORING LOG

8/22/18 G. Moody

D. HutchinsOperator:

T yp e

Weather:

SAMPLE

Plastic Limit Standard Penetration Test Data

Project Datum:

(Blows / ft)

3239.9 ft

Undisturbed (UD)

8/22/18

R ec

(f t)

Project Name:

Surface Elevation:

47.5 ft

Boring Location:

La ye r

D ep th ft)

Boring Began:

FEDERAL HIGHWAY ADMINISTRATION

EASTERN FEDERAL LANDS HIGHWAY DIVISION

Liquid Limit

SPT

U. S. DEPARTMENT OF TRANSPORTATION

At Completion:

Completed:

N o.

Blue Ridge Parkway, MP 276.8, Deep Gap, NC

E le va tio n (f ee t)

3 3/4" Boring Method:

Rock Core Diam:

Vane Shear

30 in.

140 lbs/Automatic

Penetrometer (PP in tsf)

Water Content %

Hole Diameter:

NAD83

HSA

BH18-01

Hammer Wt. & Type:

Sunny, 73°F

BLRI MP 276.8

S P

T B lo w s pe r in

P P

B O

R

IN

G L

O G

/4

/1

:0

M

P R

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LR

I\2

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\T E

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A C

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V E

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G

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G S

\G

IN

T B

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IN

G

L O

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\N P

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I 2 F

M P

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O R

IN

G

L O

G S

-D R

A F

T .G

P J

3201.9

3189.9

Sheet: 2 of 2

1.7

1.5

1.0

0.5

0.5

1.1

0.6

1.1

1.6

1.5

1.3

1.7

1.7

1.4

15-17-13-9

6-9-8-5

3-5-3-3

4-2-1-3

1-0-0-0

0-2-2-2

0-1-2-2

2-3-5-6

4-4-4-7

8-7-10-9

7-6-10-12

4-7-6-8

4-7-8-13

3-4-5-7

Asphalt Pavement

Base aggregate

Fill, very loose to medium dense, tan-brown, moist, non plastic.

Silty SAND with Gravel (SM), very loose to loose, tan, wet, non plastic. A-2-4(0)

Moist (18'-22')

Silty SAND with Gravel (SM), medium dense, brown, moist, non plastic.

Silty SAND (SM), loose to medium dense, brown-white, moist, non plastic. A-4(0)

J-1

J-2

J-3

J-4

J-5

J-6

J-7

J-8

J-9

J-10

J-11

J-12

J-13

J-14

J-15

0.6 1.0

10.0

22.0

28.0

35.0

Project Location:

Encountered at:

After

Northing: 910498.3 Easting: 1262201.17

Caved at:

Hammer Drop:

Rock Core (RQD in %) hrs

10.0 ft

Remarks:

Auger Cuttings

G ra ph ic

L og

NP BLRI 2F28

Density, Color, Plasticity, Size, Proportions, Moisture

D ep th S ca le ft)

Inspector:

MATERIAL DESCRIPTION

Boring No.:

Groundwater Depth:

Sample Types:

BORING LOG

8/23/18 D. Hutchins

J. FarleyOperator:

T yp e

Weather:

SAMPLE

Plastic Limit Standard Penetration Test Data

Project Datum:

(Blows / ft)

3236.1 ft

Undisturbed (UD)

8/23/18

R ec

(f t)

Project Name:

Surface Elevation:

52.5 ft

Boring Location:

La ye r

D ep th ft)

Boring Began:

FEDERAL HIGHWAY ADMINISTRATION

EASTERN FEDERAL LANDS HIGHWAY DIVISION

Liquid Limit

SPT

U. S. DEPARTMENT OF TRANSPORTATION

At Completion:

Completed:

N o.

Blue Ridge Parkway, MP 276.8, Deep Gap, NC

E le va tio n (f ee t)

3 3/4" Boring Method:

Rock Core Diam:

Vane Shear

30 in.

140 lbs/Automatic

Penetrometer (PP in tsf)

Water Content %

Hole Diameter:

NAD83

HSA

BH18-02

Hammer Wt. & Type:

Sunny, 68°F

BLRI MP 276.8

S P

T B lo w s pe r in

P P

B O

R

IN

G L

O G

/4

/1

:0

M

P R

O

JE

C T

S \B

LR

I\2

F

\T E

C H

S E

R V

\G E

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A C

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A

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\G

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T B

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\N P

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G

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-D R

A F

T .G

P J

3235.5 3235.1

3226.1

3214.1

3208.1

3201.1

Sheet: 1 of 2

2.0

2.0

2.0

2.0

2.0

2.0

1.6

2.0

1.5

1.5

2-4-5-6

4-6-8-11

4-6-7-9

4-5-8-10

4-7-10-10

4-6-8-11

2-7-11-15

6-7-11-15

5-9-12-17

7-9-13-17

Silty SAND (SM), medium dense, brown-white, moist, non plastic. A-2-4(0) (Continued)

Bottom of Boring: 60.0 ft

J-15

J-16

J-17

J-18

J-19

J-20

J-21

J-22

J-23

J-24

60.0

Project Location:

Encountered at:

After

Northing: 910498.3 Easting: 1262201.17

Caved at:

Hammer Drop:

Rock Core (RQD in %) hrs

10.0 ft

Remarks:

Auger Cuttings

G ra ph ic

L og

NP BLRI 2F28

Density, Color, Plasticity, Size, Proportions, Moisture

D ep th S ca le ft)

Inspector:

MATERIAL DESCRIPTION

Boring No.:

Groundwater Depth:

Sample Types:

BORING LOG

8/23/18 D. Hutchins

J. FarleyOperator:

T yp e

Weather:

SAMPLE

Plastic Limit Standard Penetration Test Data

Project Datum:

(Blows / ft)

3236.1 ft

Undisturbed (UD)

8/23/18

R ec

(f t)

Project Name:

Surface Elevation:

52.5 ft

Boring Location:

La ye r

D ep th ft)

Boring Began:

FEDERAL HIGHWAY ADMINISTRATION

EASTERN FEDERAL LANDS HIGHWAY DIVISION

Liquid Limit

SPT

U. S. DEPARTMENT OF TRANSPORTATION

At Completion:

Completed:

N o.

Blue Ridge Parkway, MP 276.8, Deep Gap, NC

E le va tio n (f ee t)

3 3/4" Boring Method:

Rock Core Diam:

Vane Shear

30 in.

140 lbs/Automatic

Penetrometer (PP in tsf)

Water Content %

Hole Diameter:

NAD83

HSA

BH18-02

Hammer Wt. & Type:

Sunny, 68°F

BLRI MP 276.8

S P

T B lo w s pe r in

P P

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3176.1

1.6

0.5

0.9

0.8

1.3

1.4

1.4

0.4

1.1

1.3

1.4

2.0

0.9

0.9

3-4-5-10

3-8-50/3"

5-3-2-2

2-1-2-5

2-3-3-5

7-10-8-11

6-5-8-9

8-11-50/5"

21-27-45-50/1"

10-20-30-31

13-32-11-9

6-6-6-29

26-44-29-50/2"

15-13-12-16

Top Soil

Fill, loose, tan-brown, moist, non plastic.

Silty SAND with Gravel (SM), very loose to loose, tan, moist, non plastic. A-2-4(0)

Organics (10'-12')

Silty SAND with Gravel (SM), medium dense, brown, moist, non plastic. A-1-b

Silty SAND, medium dense, brown-white, moist, non plastic.

J-1

J-2

J-3

J-4

J-5

J-6

J-7

J-8

J-9

J-10

J-11

J-12

J-13

J-14

J-15

0.6

5.0

12.0

30.0

Project Location:

Encountered at:

After

Northing: 910515.06 Easting: 1262162.87

Caved at:

Hammer Drop:

Rock Core (RQD in %) hrs

5.0 ft

Remarks:

Auger Cuttings

G ra ph ic

L og

NP BLRI 2F28

Density, Color, Plasticity, Size, Proportions, Moisture

D ep th S ca le ft)

Inspector:

MATERIAL DESCRIPTION

Boring No.:

Groundwater Depth:

Sample Types:

BORING LOG

8/24/18 D. Hutchins G. MoodyOperator:

T yp e

Weather:

SAMPLE

Plastic Limit Standard Penetration Test Data

Project Datum:

(Blows / ft)

3238.2 ft

Undisturbed (UD)

8/24/18

R ec

(f t)

Project Name:

Surface Elevation:

44.8 ft

Boring Location:

La ye r

D ep th ft)

Boring Began:

FEDERAL HIGHWAY ADMINISTRATION

EASTERN FEDERAL LANDS HIGHWAY DIVISION

Liquid Limit

SPT

U. S. DEPARTMENT OF TRANSPORTATION

At Completion:

Completed:

N o.

Blue Ridge Parkway, MP 276.8, Deep Gap, NC

E le va tio n (f ee t)

3 3/4" Boring Method:

Rock Core Diam:

Vane Shear

30 in.

140 lbs/Automatic

Penetrometer (PP in tsf)

Water Content %

Hole Diameter:

NAD83

HSA

BH18-03

Hammer Wt. & Type:

Sunny, 62°F

BLRI MP 276.8

S P

T B lo w s pe r in

P P

B O

R

IN

G L

O G

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/1

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3237.6

3233.2

3226.2

3208.2

Sheet: 1 of 2

9"

11"

1.3

1.4

1.6

1.4

1.6

1.5

7-11-11-12

7-8-9-12

5-6-7-11

3-6-8-10

2-6-9-12

3-4-5-12

Silty SAND, medium dense, brown-white, moist, non plastic. (Continued)

Bottom of Boring: 50.0 ft

J-15

J-16

J-17

J-18

J-19

J-20

50.0

Project Location:

Encountered at:

After

Northing: 910515.06 Easting: 1262162.87

Caved at:

Hammer Drop:

Rock Core (RQD in %) hrs

5.0 ft

Remarks:

Auger Cuttings

G ra ph ic

L og

NP BLRI 2F28

Density, Color, Plasticity, Size, Proportions, Moisture

D ep th S ca le ft)

Inspector:

MATERIAL DESCRIPTION

Boring No.:

Groundwater Depth:

Sample Types:

BORING LOG

8/24/18 D. Hutchins G. MoodyOperator:

T yp e

Weather:

SAMPLE

Plastic Limit Standard Penetration Test Data

Project Datum:

(Blows / ft)

3238.2 ft

Undisturbed (UD)

8/24/18

R ec

(f t)

Project Name:

Surface Elevation:

44.8 ft

Boring Location:

La ye r

D ep th ft)

Boring Began:

FEDERAL HIGHWAY ADMINISTRATION

EASTERN FEDERAL LANDS HIGHWAY DIVISION

Liquid Limit

SPT

U. S. DEPARTMENT OF TRANSPORTATION

At Completion:

Completed:

N o.

Blue Ridge Parkway, MP 276.8, Deep Gap, NC

E le va tio n (f ee t)

3 3/4" Boring Method:

Rock Core Diam:

Vane Shear

30 in.

140 lbs/Automatic

Penetrometer (PP in tsf)

Water Content %

Hole Diameter:

NAD83

HSA

BH18-03

Hammer Wt. & Type:

Sunny, 62°F

BLRI MP 276.8

S P

T B lo w s pe r in

P P

B O

R

IN

G L

O G

/4

/1

:0

M

P R

O

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C T

S \B

LR

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L O

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\G

IN

T B

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IN

G

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G S

\N P

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G

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T .G

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3188.2

EFLHD NEPA Categorical Exclusion Form EFL-TM-ENV-03(04)

Project Number

Eastern Federal Lands Highway Division NEPA Categorical Exclusion Form

Project Number: BLRI 2F27, 2F28 Date: 5/19/2021

Project Name: Repair of 3 Slopes at Milepost (MP) 276.8, MP

277.1 and MP 323.25

Location: National Park Service, Blue Ridge Parkway Watauga and McDowell Counties, NC

CE Category 23 CFR 771.117 (c)(22): Projects, as defined in 23 U.S.C. 101, that would take place entirely within the existing operational right-of-way [...]

See 23 CFR 771.117 for full description of CE categories, including additional requirements when applying (c)26-28.

Project Description This project includes the permanent repair and stabilization for the following failed slopes; fill slope at MP 276.8, cut slope at MP 277.1 and cut slope at MP 323.25.

Repair of the fill slope at MP 276.8 will be the base schedule for the project. The slope failure is approximately 125 ft long. The failure has been active for several years, and several interim repairs have been made to the site in the past. Within the past 6-8 years, the cracks and dips have resulted in road closures due to safety concerns. While the interim asphalt patches installed have allowed the road to be re-opened, the cracks and dips have returned. FHWA geotechnical engineers have assessed the site and observed that the site continues to show movement and instability. Specific work under this project may include one or more of the following (to be determined by a geotechnical analysis and value analysis): • mechanically stabilized earth wall or slope • soil nails • other stabilization measures as appropriate.

For MP 277.1, slope failures in early 2017 and again in 2018 led to Parkway closures. After each failure, rock scaling and debris cleanup emergency work allowed the Parkway to be reopened and temporarily mitigated the risk of additional failures in the short-term. The intent of this project is to mitigate the risk of additional slope failures in the long-term. Specific work under this project may include one or more of the following (to be determined by a geotechnical analysis and value analysis): • rock bolts • slope netting • catchment ditch • other stabilization measures as appropriate. The length of slope to be assessed for repair is approximately up to 225 ft.

EFLHD NEPA Categorical Exclusion Form EFL-TM-ENV-03(04)

For MP 323.25, slope failure is approximately 100 ft long and 50 ft high. An initial failure occurred in 2004 after an intense rainfall and was repaired with an anchor block stabilization system. In 2018, after a 5 inch rainfall, soil and rock slid into the motor road, resulting in a full Parkway closure in this area. Upon investigation by FHWA, it was determined that the previous slope stabilization measures had failed and the slide had reactivated. The project may include one or more of the following (to be determined by a geotechnical analysis and value analysis): • mass grading-removal of material • soil nails and slope netting • recondition/reusing the existing stability system • Other stabilization and/or slide impact mitigation measures, as appropriate.

Environmental Commitments and Mitigation Measures Trees to be removed shall be cut outside of time of year restrictions, between September 30 and April 15 Please ensure that the project includes revegetating the disturbed areas of the APE so that the stablilization measures (incl. soil nail wall) are not as visible from the Parkway road.

Please also preserve any potentially historic small scale features within the APE, including curbing, headwalls/tailwalls, and wooden or stone guard rails.

If previously unknown archeological resources are discovered during construction, all work in the immediate vicinity (600 feet) of the discovery shall be halted until the resources are identified and documented and an appropriate mitigation strategy developed, if necessary, in accordance with pertinent laws and regulations, including the stipulations of the 2008 Programmatic Agreement Among the National Park Service (U.S. Department of the Interior), the Advisory Council on Historic Preservation, and the National Conference of State Historic Preservation Officers.

All workers will be informed of the criminal penalties for illegally collecting artifacts or intentionally damaging any archeological or historic property. Workers will also be informed of the correct procedures should previously unknown resources be uncovered during construction activities. Data recovery excavations will be carried out under NPS guidance to mitigate adverse affects as outlined in the section on environmental consequences.

Please ensure that the project includes revegetating the disturbed areas of the APE so that the stabilization measures (incl. soil nail wall) are not as visible from the Parkway road.

Please also preserve any potentially historic small scale features within the APE, including curbing, headwalls/tail walls, and wooden or stone guard rails.

Summary of Section 7 of the Endangered Species Act Compliance Section 7 compliance is a component of the NPS CE. Work will take place in consultation with the NPS natural resource staff to monitor and mitigate any impacts to natural resources; impacts are not expected to be significant.

EFLHD NEPA Categorical Exclusion Form EFL-TM-ENV-03(04)

Summary of Section 106 of the National Historic Preservation Act Compliance NPS conducted Streamlined Review under the 2008 Servicewide Programmatic Agreement for Section 106 consultation.

Additional Agency Coordination and Compliance NPS prepared a Categorical Exclusion for the project on 3/5/2021 (PEPC PIN 95684)

FHWA contacted the US Army Corp of Engineers regarding the need for a Clean Water Act, Section 404 permit at MM 277.1 ‐ Because the proposal involves the installation of wire mesh and rock anchors, the seeps will not be filled, and the existing hydrology will be essentially preserved.

Similarly, the ditch would be maintained and restored to its existing condition. A determination of jurisdiction is not needed at this time, and an Army Corp permit is not required.

EFLHD NEPA Categorical Exclusion Form EFL-TM-ENV-03(04)

Categorical Exclusion Recommendation:

On the basis of the environmental impact information in the statutory compliance file, with which I am familiar, I believe the project should be categorically excluded from further NEPA analysis.

Ryan D. Kimberley Environmental Protection Specialist

Federal Highway Administration

Date

Categorical Exclusion Determination:

On the basis of the environmental impact information in the statutory compliance file, with which I am familiar, I am categorically excluding the described project from further NEPA analysis. The project meets the 23 CFR 771.117(a) definition of a categorical exclusion. No unusual circumstances per 23 CFR 771.117(b) apply.

Kevin S. Rose Environmental Team Leader

Federal Highway Administration

Date

EFLHD NEPA Categorical Exclusion Form EFL-TM-ENV-03(04)

Appendix A: Environmental Checklist

Section 7 of the Endangered Species Act:

Are Federally-listed species potentially present in the study area? ☒Yes, see Notesi ☐No If Yes, effects determination:

☐No Effect ☒May Affect, Not Likely to Adversely Affect ☐May Affect, Likely to Adversely Affect

Section 106 of the National Historic Preservation Act:

Are historic properties known to be present in the study area? ☒Yes ☐No

If Yes, will they be impacted by the project? ☐Yes ☐No Will previously undisturbed ground be disturbed?

☒Yes ☐No Effects determination:

☐No Historic Properties Affected ☒No Adverse Effect ☐Adverse Effect, MOA Executed Was tribal consultation completed? ☐Yes ☒No

Water and Wetlands:

Section 404 of the Clean Water Act

Are impacts to Waters of the US anticipated? ☐Yes ☒No If Yes, approval anticipated:

☐Nationwide Permit (NWP) ☐Regional General Permit ☐Individual Permit

Section 401 of the Clean Water Act ☐NWP certified by State ☐Individual Certification

Section 402 of the Clean Water Act (National Pollutant Discharge Elimination System) Will the land disturbance threshold likely be exceeded to require a permit and SWPPP?

☐Yes ☒ No

Is post-construction stormwater management review/approval anticipated? ☐Yes ☒No ☒Project is consistent with Executive Order 11990, Protection of Wetlands

Floodplains:

Is the project in a FEMA floodplain?

☐Yes ☒No ☐ Floodplain not mapped ☒ Project is consistent with Executive Order 11988, Floodplain Management

Section 4(f) of the USDOT Act:

Does the project meet the Section 4(f) exemption for Federal lands transportation facilities under

Section 1119(c)(2) of MAP-21, 23 U.S.C. 138(a)? ☒Yes ☐No Is there a use of a Section 4(f) property in the study area? ☐Yes ☐No

EFLHD NEPA Categorical Exclusion Form EFL-TM-ENV-03(04)

If Yes, De Minimis Finding:☐ Programmatic:☐ Individual 4(f): ☐ Section 6(f) of the Land and Water Conservation Fund:

Was the property purchased with grant funds from the Land and Water Conservation Fund?

☐Yes ☒No

If Yes, was documentation of approval from National Park Service Director received for the conversion or replacement of 6(f) property? ☐Yes ☐No

Coastal Zone Management Act of 1972:

Is the project in a Coastal Zone? ☐Yes ☒No If yes, will a Federal Consistency Review be completed? ☐Yes ☐No

Right of Way:

Is the project completely within the transportation facility’s right-of-way? ☒Yes ☐No If no, will the project require relocations or easements? ☐Yes ☐No

Hazardous Waste and Materials:

Are hazardous materials or contamination exceeding regulatory thresholds (as set by U.S. EPA, County Environmental Health, etc.) present? ☐Yes ☒No If Yes, is the nature and extent of the hazardous materials or contamination fully known? ☐Yes ☐No, plan for securing information provided in Notes Section 7(a) of the Wild and Scenic Rivers Act:

Are there Wild and Scenic Rivers? ☐Yes ☒No ☐Eligible If Yes, has review by the river-administering agency been completed? ☐Yes ☐No

Clean Air Act:

Is the project in a non-attainment area? ☐Yes ☒No

If Yes, is the project on the Transportation Improvement Program(TIP)/State Implementation Plan(SIP)? ☐ Yes ☐No

Highway Traffic and Construction Noise Regulations:

☐ The proposed project is a Type I project (highway on a new location, substantial horizontal or vertical alteration, new through or auxiliary lanes). Noise analysis is required.

☐ The proposed project is a Type II project (retrofit for noise abatement).

☒ The proposed project is a Type III project (noise analysis not required).

☐ Does not apply.

Environmental Justice and Title IV Act:

Is an Environmental Justice population, as identified in Executive Order 12898, present?

☐Yes, explanation provided in Notes section ☒No Will the project induce disproportionately high and adverse impacts to minority, low income, or special groups? ☐Yes, additional analysis is needed ☒No Farmland Protection Policy Act for Highway Projects:

Does the project displace, require acquisition of, or require an easement from farmland?

EFLHD NEPA Categorical Exclusion Form EFL-TM-ENV-03(04)

☐Yes ☒No Does the project affect any other resources not listed above? Explain below and list anticipated permits:

i Federally-listed species per U.S. Fish and Wildlife Service’s IPaC: see NPS CE