ENGINEERS ARCHITECTS SURVEYORS

T&L 726 Auburn Avenue Radford, Virginia 24141 tel: 540.633.1897 fax: 540.633.1896 www.T-L.com

ADDENDUM NO. 002 TO: All Plan Holders RE: Hangar 4 Pavement and Drainage Repairs Project for Roanoke Regional Airport Commission T&L Project No. 15391 DATE: October 30, 2020 BIDS RECEIVED DATE: November 10, 2020 This Addendum forms a part of the Contract Documents and modifies the original Bidding Documents Issued for Bid on October 14, 2020. Acknowledge receipt of this Addendum in the space provided on the Bid Form. Failure to do so may subject Bidder to disqualification. This Addendum consists of 5 pages. CLARIFICATIONS AND ANSWERS TO PRE-BID QUESTIONS:

1. Coordinate potential phasing of work with the airport. Airport and Hangar tenant prefer work to begin with milling of asphalt on the southwest side of the hangar.

2. Hangar will remain operational. Coordination will be required with hangar tenant. Phasing may be required by work to accommodate hangar use. Hangar supervisors contact information can be obtained.

a. Hangar supervisor contact information can be coordinated with the low bidder and airport upon award.

3. Grass / asphalt area on southwest side of hangar could be a place to store equipment, not materials. RRAC to determine.

a. Area may be used for storage. Limits to be coordinated with Airport and Hangar tenant. Storage cannot impact hangar operations.

4. RRAC can provide flight schedule. a. Can be provided to low bidder.

5. Provide additional information on the asphalt spec? The referenced FAA Guideline appears to offer options for selection by the EOR.

a. The details for Asphalt Overlay and Heavy-Duty Pavement have been revised to correspond with typical VDOT paving specifications. Please see revised Plan Sheet C300.

Addendum No. 002

Hangar 4 Pavement and Drainage Repairs Project

October 30, 2020

Page 2

T&L www.T-L.com

6. Is testing of the asphalt or concrete required? Who is responsible for the testing the stone backfill required to compacted to a certain level, does it need to be measured / tested?

a. Contractor shall perform contractor quality control program for asphalt placement in accordance with Section 315 of VDOT Road and Bridge Specification. Contractor shall provide asphalt density results and asphalt sample to Owner / Engineer. Compaction testing of the stone backfill at the inlets shall not be required; however, Contractor shall properly orient the stone in accordance with Note 3 on Plan Sheet C200.

7. Can the limits of concrete and pavement repair around the inlets and manhole be identified on the plan?

a. The estimated limits of the concrete and pavement repair around inlets have been added to Plan Sheet C100. The Contractor shall be responsible for field verifying and performing their own estimate based on their planned installation / construction methods.

8. If the existing pipe connection to the drop inlets needs to be cut and a new piece of pipe installed to make the connection, is there a preferred tie-in method?

a. The Engineer has no preference provided that the connections are watertight. The contractor may utilize fernco type couplings or grout or other means to ensure a watertight connection.

9. Is flowable fill allowable for backfilling?

a. Yes. 10. Can you clarify where the concrete details “Control Joint” or “Construction Joint” should be used?

a. Control Joints will not be required. The detail for Construction Joints has been revised. Please see revised Plan Sheet C300.

11. Airport will determine if the asphalt millings can be transported to airport lot or if the contractor must dispose of.

a. Contractor will deliver asphalt milling to airport storage site along Thirlane Road. 12. Can tack coat be used in-lieu of grinding or milling of the concrete?

a. Addressed by the detail for Asphalt Overlay of Concrete Rigid Pavement. Please see revised Plan Sheet C300.

CHANGES TO DRAWINGS:

Sheet C100 – EXISTING / DEMOLITION SITE PLAN

1. REPLACE Sheet C100 in its entirety.

Sheet C200 – SITE PLAN 1. REPLACE Sheet C200 in its entirety.

Sheet C300 – MISCELLANEOUS DETAILS

1. REPLACE Sheet C300 in its entirety.

Enclosures: C100, C200, and C300, 3 pages

HANGAR 4

EXISTING STORM SYSTEMDRAINAGE SUMMARY

STRUCTURE NAME DETAILS

CONTOUR INTERVAL =1" =

( IN FEET )

GRAPHIC SCALE

30'1'

10-02-2020

Date

No.

Purp

ose

of D

ocum

ent I

ssue

Date

Checked

Drawn

Designed

Sheet No.

Project No.

15391

T H O M P S O N& L I T T O N

HA

NG

AR 4

PAV

EMEN

T EV

ALU

ATIO

N

MAM

TCR

TCR

10/3

0/20

20AD

DEN

DUM

NO

. 001

1

ABBREVIATIONS:

C100

EXIS

TIN

G /

DEM

OLI

TIO

N S

ITE

PLAN

LEGENDSYMBOL DESCRIPTION

EXISTING PAVEMENT MILLING

EXISTING PAVEMENT

HANGAR 4

CONTOUR INTERVAL =1" =

( IN FEET )

GRAPHIC SCALE

30'1'

10-02-2020

Date

No.

Purp

ose

of D

ocum

ent I

ssue

Date

Checked

Drawn

Designed

Sheet No.

Project No.

15391

T H O M P S O N& L I T T O N

HA

NG

AR 4

PAV

EMEN

T EV

ALU

ATIO

N

MAM

TCR

TCR

10/3

0/20

20AD

DEN

DUM

NO

. 001

1

C200

SITE

PLA

N

LEGENDSYMBOL DESCRIPTION

NEW STORM STRUCTURE

ASPHALT OVERLAY

HEAVY DUTY PAVEMENT

CONCRETE RIGID PAVEMENT

1

1

1

1

1

STRUCTURE NO. 4 STRUCTURE NO. 5

STRUCTURE NO. 7

STRUCTURE NO. 8

SECTION

STORMWATER PRECAST STANDARD MANHOLE

STORM STRUCTURES

TYPICAL SECTION - HEAVY DUTY PAVEMENT

TYPICAL DETAIL - CONSTRUCTION JOINT FOR

CONCRETE RIGID PAVEMENTTYPICAL DETAIL - CONCRETE RIGID PAVEMENT

10-02-2020

Date

No.

Purp

ose

of D

ocum

ent I

ssue

Date

Checked

Drawn

Designed

Sheet No.

Project No.

15391

T H O M P S O N& L I T T O N

HA

NG

AR 4

PAV

EMEN

T EV

ALU

ATIO

N

MAM

TCR

TCR

10/3

0/20

20AD

DEN

DUM

NO

. 001

1

C300

MIS

CELL

ANEO

US

DETA

ILS

TYPICAL DETAIL - ASHALT OVERLAY OF CONCRETERIGID PAVEMENT

1

1

1

1

1

1

1