ESBD_518055_1781113354959_Addendum 3.pdf

JEFFERSON COUNTY PURCHASING DEPARTMENT

Deborah L. Clark, Purchasing Agent

1149 Pearl Street OFFICE MAIN: (409) 835-8593 1st Floor, Beaumont, TX 77701 FAX: (409) 835-8456

(IFB 26-024/MR), Jack Brooks Regional Airport Airfield Lighting Rehabilitation – ADDENDUM NO. 3 PAGE 1 of 23

Addendum to IFB

IFB NUMBER: IFB 26-024/MR

IFB TITLE: Jack Brooks Regional Airport Airfield Lighting Rehabilitation

IFB DUE BY: 11:00 am CT, Wednesday, June 17, 2026

ADDENDUM NO.: 3

ISSUED (DATE): June 10, 2026

To Bidder: This Addendum is an integral part of the IFB package under consideration by you as a Bidder in connection with the subject matter herein identified. Jefferson County deems all sealed bids to have been proffered in recognition and consideration of the entire IFB Specifications Package – including all addenda. For purposes of clarification, receipt of this present Addendum by a Bidder should be evidenced by returning it (signed) as part of the Bidder’s sealed bid submission. If the bid submission has already been received by the Jefferson County Purchasing Department, Bidder should return this addendum in a separate sealed envelope, clearly marked with the IFB Title, IFB Number, and IFB Opening Date and Time, as stated above.

Reason for Issuance of this Addendum:

1. Plan & Specification revisions from Garver, USA

2. Revised Bid Form.

The information included herein is hereby incorporated into the documents of this present bid matter and supersedes any conflicting documents or portion thereof previously issued.

Receipt of this Addendum is hereby acknowledged by the undersigned Respondent:

ATTEST:

Authorized Signature (Respondent)

Witness Title of Person Signing Above

Witness Typed Name of Business or Individual

Approved by ____ Date: _________ Address

21 Waterway Ave.

Suite 300 Office 348

The Woodlands, TX 77380 www.GarverUSA.com

ADDENDUM NO. 3

Date: June 10, 2026

Project Name: Airfield Lighting Rehabilitation Project

Owner: Jefferson County

Jack Brooks Regional Airport

Owner Project No: Jefferson County Project IFB 26-024/MR

Garver Project No: 2400880

This addendum shall be a part of the Plans, Contract Documents and Specifications to the same extent as though it were originally included therein, and it shall supersede anything contained in the Plans, Contract

Documents, and Specifications with which it might conflict. This addendum, including all attachments, shall become part of the Contract and all provisions of the Contract shall apply thereto. The time provided for completion of the Contract has not been changed as noted in this addendum. Acknowledgement of receipt of this addendum must be noted in the appropriate section of the Bid Form and included with the Contract

Documents.

A. SPECIFICATIONS

1. Remove and replace the Bid Form with the replacement Bid Form attached hereto.

2. Remove the following specifications sections in their entirety, and replace with the same, attached hereto:

a. SS-301 – Electrical Demolition and Relocation Work

b. L-115 – Electrical Manholes and Junction Structures

3. Revise Section 00 72 00 – General Provisions as follows:

a. Revise paragraph 70-15 by deleting “John Doe” and replacing with “Bruce Hyers”

b. Revise paragraph 70-15 by deleting “(555) 555-5555” and replacing with “(615) 717-8592”

B. STANDARD DETAILS

1. No items for Standard Details are included in this addendum.

C. DRAWINGS

1. Remove the following drawings in their entirety, and replace with the same, attached hereto:

a. GC001 – Construction Safety & Phasing Notes 1

b. ED106 – Lighting Demolition Plan 6

c. EL507 – Lighting Installation Details 7

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 2 of 23

Addendum No. 3 – Airfield Lighting Rehabilitation Project

June 10, 2026

Garver Project No. 2400880 Page 2

By:

Matthew LeMay, PE Senior Project Manager

Attachments:

Specifications

Bid Form

SS-301 – Electrical Demolition and Relocation Work

L-115 – Electrical Manholes and Junction Structures

Drawings

GC001 – Construction Safety & Phasing Notes 1

ED106 – Lighting Demolition Plan 6

EL507 – Lighting Installation Details 7

END OF ADDENDUM NO. 3

Digitally Signed 06/10/2026

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 3 of 23

UPS Sch 1

ITEM

NO. SPEC. NO. DESCRIPTION UNIT

ESTIMATED

QUANTITY UNIT PRICE AMOUNT

1 SS-120-3.1 Construction Safety and Security LS 1

2 SS-300-5.1

Lockout/Tagout and Constant Current Regulator

Calibration Procedures

LS 1

3 SS-300-5.2 Electrical Vault Modifications LS 1

4 SS-300-5.3 Existing Lighting Regulator, Removed EA 3

5 SS-300-5.4 L-829, 10 kW, Lighting Regulator, Installed EA 2

6 SS-300-5.5 L-829, 7.5 kW, Lighting Regulator, Installed EA 2

7 SS-300-5.6 Generator and Transfer Switch System, Installed LS 1

8 SS-300-5.7 ALCMS Modifications ALLOW 1 40,000.00$

9 SS-301-5.1

Existing Base Mounted Runway Edge Light, Removed

EA 97

10 SS-301-5.2

Existing Flush In-Pavement Runway Edge Light, Removed, Blank Cover Installed

EA 9

11 SS-301-5.3 Existing Base Mounted Guidance Sign, Removed EA 33

12 SS-301-5.4

Existing Base Mounted Guidance Sign, Removed, Base to Remain

EA 7

13 SS-301-5.5

Existing Base Mounted Taxiway Edge Light, Removed, Base to Remain

EA 34

14 SS-301-5.6

Existing Base Mounted Taxiway Edge Light, Removed

EA 56

15 SS-301-5.7

Existing Runway End Identification Light System, Removed

EA 3

16 SS-301-5.8

Existing Base Mounted Runway Threshold Lights, Removed

EA 24

17 SS-301-5.9

Existing Base Mounted Runway Threshold Lights with Base to Remain, Removed

EA 8

18 SS-301-5.10 Existing Generator and Transfer Switch, Removed LS 1

19 SS-301-5.11 Existing Airport Rotating Beacon Fixture, Removed LS 1

20 SS-301-5.12

Existing Base Mounted Runway Edge Light with

Base to Remain, Removed

EA 10

21 SS-301-5.13 Conduit or Duct Bank, Cleared – per Linear Foot LF 10,350

22 SS-301-5.14 Abandoned Sign Base, Removed EA 1

23 SS-301-5.15 Existing Handhole, Removed EA 2

24 SS-305-5.1

Directional Boring, 1-Way 2”C Polyethylene

Conduits

LF 1,400

25 SS-305-5.2

Directional Boring, 2-Way 2”C Polyethylene

Conduits

LF 1,800

26 SS-310-5.1 Flight Check Mobilization EA 1

27 SS-310-5.2 Temporary Airfield Lighting LS 1

28 C-105-6.1 Mobilization (Maximum 5% of Total Bid) LS 1

29 L-101-5.1 L-802A(L), Class I Airport Rotating Beacon, In

Place

EA 1

30 L-108-5.1 No. 8 AWG, 5 kV, L-824, Type C Cable, Installed in

Trench, Duct Bank or Conduit

LF 51,500

JACK BROOKS REGIONAL AIRPORT

BPT AIRFIELD LIGHTING REHABILITATION

UNIT PRICES - BASE BID

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 4 of 23

31 L-108-5.2

No. 6 AWG, Solid, Bare Copper Counterpoise Wire, Installed Above the Duct Bank or Conduit, Including

Connections/Terminations

LF 31,400

32 L-110-5.1 Non-Encased Electrical Conduit, 1W-2” LF 25,100

33 L-110-5.2 Concrete Encased Electrical Conduit, 1W-2” with

Sawkerf Pavement Repair

LF 700

34 L-110-5.3 Non-Encased Electrical Conduit, 2W-2” LF 650

35 L-115-5.1 Electrical Junction Structure, L-867 Class 1, Size

16” Diameter by 24” Depth

EA 11

36 L-115-5.2 Electrical Junction Structure Plaza, Two L-867

Class 1, Size 16” Diameter by 24” Depth Cans

EA 10

37 L-115-5.3 3'x4' Airfield Handhole Cover Replacement EA 3

38 L-125-5.1 L-849A(L) Runway End Identification Lights

System, Installed on Runway 16

LS 1

39 L-125-5.2 L-849A(L) Runway End Identification Lights

System, Installed on Runway 34

LS 1

40 L-125.5.3 L-849A(L) Runway End Identification Lights

System, Installed on Runway 30

LS 1

41 L-125-5.4

L-850C(L) Low Profile Base Mounted In-pavement

Runway Edge Light, Installed In Existing Full

Strength Pavement

EA 8

42 L-125-5.5 L-862(L) Base Mounted Runway Edge Light, Installed

EA 98

43 L-125-5.6 L-862(L) Base Mounted Runway Edge Light, Installed on Existing Base

EA 10

44 L-125-5.7 L-861T(L) Base Mounted Taxiway Edge Light, Installed

EA 4

45 L-125-5.8 L-861T(L) Base Mounted Taxiway Edge Light, Installed on Existing Base

EA 34

46 L-125-5.9 L-862E(L) Base Mounted Runway Threshold Light, Installed

EA 24

47 L-125-5.10 L-862E(L) Base Mounted Runway Threshold Light, Installed on Existing Base

EA 8

48 L-125-5.11 L-858 Base Mounted, 1-Module Guidance Sign, Installed

EA 9

49 L-125-5.12 L-858 Base Mounted, 1-Module Guidance Sign, Installed on Existing Base

EA 1

50 L-125-5.13 L-858 Base Mounted, 2-Module Guidance Sign, Installed on Existing Base

EA 4

51 L-125-5.14 L-858 Base Mounted, 3-Module Guidance Sign

Installed on Existing Base

EA 2

52 L-125-5.15 L-858 Base Mounted, 4-Module Guidance Sign, EA 1

53 P-101-5.2 Pavement Marking Removal SF 2,080

TOTAL BID - BASE BID

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 5 of 23

UPS Sch 2

ITEM

NO. SPEC. NO. DESCRIPTION UNIT

ESTIMATED

QUANTITY UNIT PRICE AMOUNT

1 SS-120-3.2 Construction Safety and Security (ADD ALT 1) LS 1

2 SS-305-5.1

Directional Boring, 1-Way 2”C Polyethylene

Conduits

LF (575)

3 L-108-5.1 No. 8 AWG, 5 kV, L-824, Type C Cable, Installed in

Trench, Duct Bank or Conduit

LF (400)

4 L-108-5.2

No. 6 AWG, Solid, Bare Copper Counterpoise Wire, Installed Above the Duct Bank or Conduit, Including

Connections/Terminations

LF (200)

5 L-110-5.1 Non-Encased Electrical Conduit, 1W-2” LF 550

6 L-110-5.2 Concrete Encased Electrical Conduit, 1W-2” with

Sawkerf Pavement Repair

LF (175)

7 L-115-5.1 Electrical Junction Structure, L-867 Class 1, Size

16” Diameter by 24” Depth

EA (6)

8 P-101-5.1 Asphalt Pavement Section Removal (9" thick) SY 6,130

9 P-101-5.2 Pavement Marking Removal SF 2,080

10 P-620-5.1 Runway and Taxiway Marking, Yellow (with Type III

Reflective Media)

SF 1,040

11 P-620-5.2 Runway and Taxiway Marking, Black (without

Reflective Media)

SF 740

12 T-901-5.1 Seeding ACRE 1

13 T-905-5.1 Topsoil (8" Thickness) SY 6,130

TOTAL BID - ADDITIVE ALTERNATE 1

JACK BROOKS REGIONAL AIRPORT

BPT AIRFIELD LIGHTING REHABILITATION

UNIT PRICES - ADDITIVE ALTERNATE 1

TAXIWAY E PAVEMENT REMOVAL

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 6 of 23

Jack Brooks Regional Airport

BPT Airfield Lighting Rehabilitation

IFB 26-024/MR

Addendum No. 3 SS-301-1 Garver Project No. 2400880

ITEM SS-301 ELECTRICAL DEMOLITION WORK

DESCRIPTION

301-1.1 This item shall consist of the removal and satisfactory disposal of existing runway and taxiway edge lights, in-pavement lights, guidance signs, markers, manholes, handholes, junction structures, racks, pads, equipment, poles, towers, shelters, and other incidentals, all of which are not designated or permitted to remain, in accordance with this specification, the referenced specifications and drawings, and applicable advisory circulars. This work shall include the removal of indicated equipment, materials, and incidentals necessary for a complete item removal, including all restoration work, as a completed unit to the satisfaction of the Engineer.

301-1.2 The Contractor shall maintain current copies of all referenced and applicable standards on the job site. The Contractor is responsible to make known to the Engineer any conflict between plans and specifications that he observes or of which he is made aware.

301-1.3 Additional details pertaining to the lighting system covered in this item are contained in the advisory circular, AC 150/5340-30, Design and Installation Details for Airport Visual Aids. Additional details pertaining to the PAPI system covered in this item are contained in the advisory circular, AC 150/5345-28, Standard for Precision Approach Path Indicator (PAPI) Systems. Additional details pertaining to the REIL system covered in this item are contained in the advisory circular, AC 150/5345-51, Specification for Discharge- Type Flasher Equipment.

MATERIALS

301-2.1 All backfill and repair materials used in electrical demolition, repair and restoration work shall comply with the referenced specifications and be approved by the Engineer.

Airport lighting equipment and materials shall meet the requirements outlined in Item SS-300 and Item L-125.

For pre-cast or prefabricated concrete encased light base installations, the Contractor shall submit and coordinate the construction of the proposed pre-cast units with the Engineer onsite to review and approve the construction process. The Contractor shall submit his proposed installation process for review and approval by the Engineer. The Contractor shall provide additional items and work if required and requested by the Engineer for the construction and installation of the pre-cast units at no additional cost to the Owner.

CONSTRUCTION METHODS

301-3.1 General. No demolition shall be started until the removal and/or relocation work has been laid out and approved by the Engineer. All material shall be disposed of off-site. All hauling and disposal will be considered a necessary and incidental part of the work. Hauling cost shall be considered by the Contractor and included in the contract unit price for the pay of items of work involved. No payment will be made separately or directly for hauling on any part of the work.

Equipment removal shall typically include removing the equipment and its accessories, removing foundations/pads, removing existing conduits, conductors and appurtenances, removal of conduit to below grade, and removal of existing circuits back to source. The work shall include restoring the area to match existing, including filling and tamping all holes with earth, and clearing and leveling the site.

The Contractor shall remove all existing underground cable, which is unused or rendered unusable by this project, when such is exposed or made accessible during this work. All such wiring removed shall become property of the Contractor and shall be immediately removed from the project. Wiring in conduit shall be

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 7 of 23

Addendum No. 3 SS-301-2 Garver Project No. 2400880 removed as indicated or if new wiring is shown to be installed in its place. Existing wiring shall not be reused or reinstalled.

Wiring not exposed shall be abandoned in place, if a reasonable effort will not remove it. No measurement or payment will be made for this cable removal work. Damage to turf or other systems will not be permitted to salvage or retrieve existing cable.

Any damage to electrical equipment, systems, structures, conduits, cables, and accessories or other utilities, designated to remain in place, shall be repaired or replaced expeditiously at no additional cost to the Owner and to the satisfaction of the Owner and Engineer.

Holes, ditches, or other abrupt changes in elevation caused by the removal operations that could obstruct drainage or be considered hazardous or unsightly shall be backfilled, compacted, and left in a workmanlike condition.

Trenches or voids resulting from the removal or demolition of existing electrical equipment or other structures shall be filled with approved material placed in layers in accordance with Item P-152.

Concrete foundations and pads to be removed shall be obliterated full depth.

301-3.2 Removal and/or relocation of light fixtures and equipment. Light fixtures and other equipment which are to be removed shall be carefully excavated. All concrete bases and concrete anchors shall be removed by the Contractor. The removed lights, guidance signs, isolation transformers and wiring harnesses shall then be given to the Owner, or properly disposed of if so directed by the Owner. The ground around the removed lighting equipment shall be backfilled and properly compacted. Light fixtures and equipment which are to be relocated shall be stored on site and reinstalled with new lamps, new transformers, and all other new required accessories as indicated in the plans.

301-3.3 Removal of existing equipment. The Contractor shall carefully remove all salvageable equipment as indicated in the plans. Any equipment that is damaged during the removal and/or relocation operation shall be subject to a reduction in payment for removal and/or relocation of the equipment. All equipment that is removed during this project shall be transported to a site on the Airfield or removed from the Airfield and properly disposed of as directed by the Owner and the Engineer.

301-3.4 Relocation of existing equipment. Existing equipment that is to be relocated shall be carefully disconnected from the existing electrical system. The equipment shall be stored on site in an enclosed area protected from the weather as directed by the Owner and Engineer. The Contractor shall remove existing concrete bases and shall backfill and compact these areas to match existing. The electrical power circuit shall be field located and extended to the new installation location unless otherwise noted in the Plans.

Coordinate the extension of the electrical service with the extension of the electrical duct serving the equipment and install duct, splice and cable markers to mark the new complete route.

Refer to the plans for additional installation requirements concerning the relocation of existing lights, signs, systems and incidentals.

301-3.5 Clearing of existing duct banks or conduits. Where new cable is to be installed in an existing duct bank or conduit, the full length of the duct bank or conduit shall be cleared of debris by mechanical means before installation of the new cable. Acceptable means of clearing existing duct banks or conduits may include using a mandrel, “hydro-jetting” method, or “roto-rooting” method as approved by the Engineer.

Where existing cables are being removed from an existing duct bank or conduit and replaced with new cables, the Contractor shall use the existing cable to clear the conduit and to pull in the new cable. No separate payment will be made for clearing these duct banks or conduits or for the existing cable removal.

Clearing of these existing duct banks or conduits is incidental to the cable pay item unless otherwise noted.

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 8 of 23

Addendum No. 3 SS-301-3 Garver Project No. 2400880

METHOD OF MEASUREMENT

301-4.1 The quantity of existing duct bank or conduit, cleared, to be measured under this item, shall be the linear foot of duct bank or conduit cleared using a mandrel or other approved method to remove debris, including swabbing and clearing of each conduit in a duct bank, and installation of pull wires in spare conduits. Separate measurement shall be made for the various types and sizes of duct bank or conduit.

Partial payment will not be made for duct bank or conduit that cannot be cleared using a method acceptable to the Engineer. Separate payment will not be made for existing cable removal.

301-4.2 The quantity of existing lights or guidance signs, removed, to be measured under this item shall be the number of each complete unit removed, and accepted by the Engineer.

This item shall include removing and storing the existing equipment as directed by the Engineer.

Where the light base and concrete structure are indicated to be removed or demolished, the item shall include restoring the area to match existing, including removing the complete concrete item, filling and tamping all holes with earth (brought from off-site if necessary), and clearing and leveling the site.

Where the light base and concrete structure are to remain, a new blank cover shall be installed for protecting the light base during the construction work. Blank covers shall be removed when the existing equipment is reinstalled and given to the Owner after completion of construction work in the respective area.

301-4.3 Measurement for the removal of the REIL system shall be the number of each removed for a completed and accepted removal of a complete REIL system. Equipment shall be carefully removed and stored as directed by the Engineer and Owner. Concrete bases and appurtenances shall be demolished and removed. The area shall be restored to match existing including seeding and topsoiling. This item shall also include modifications to the current REIL power feeder, including new circuit breaker, labeling, waterproof cast splicing, splice marker and all required appurtenances to reconnect the power feeder to only serve the existing REIL equipment to the satisfaction of the Engineer.

301-4.4 Measurement for the removal of the Beacon Fixture shall be the number of each removed for a completed and accepted removal of a complete Beacon Fixture. Equipment shall be carefully removed and stored as directed by the Engineer and Owner.

BASIS OF PAYMENT

301-5.1 Payment will be made at the contract unit price for each complete item, measured as provided above, and accepted by the Engineer. This price shall be full compensation for furnishing all materials and for all preparation, assembly, and removal of these materials, and for all labor, equipment, tools, and incidentals necessary to complete this item to the satisfaction of the Engineer.

Payment will be made under:

Item SS-301-5.1 Existing Base Mounted Runway Edge Light, Removed -- per Each

Item SS-301-5.2 Existing Flush In-Pavement Runway Edge Light, Removed, Blank Cover Installed -

- per Each

Item SS-301-5.3 Existing Base Mounted Guidance Sign, Removed -- per Each

Item SS-301-5.4 Existing Base Mounted Guidance Sign, Removed, Base to Remain -- per Each

Item SS-301-5.5 Existing Base Mounted Taxiway Edge Light, Removed, Base to Remain -- per

Each

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 9 of 23

Addendum No. 3 SS-301-4 Garver Project No. 2400880

Item SS-301-5.6 Existing Base Mounted Taxiway Edge Light, Removed -- per Each

Item SS-301-5.7 Existing Runway End Identification Light System, Removed -- per Each

Item SS-301-5.8 Existing Base Mounted Runway Threshold Lights, Removed -- per Each

Item SS-301-5.9 Existing Base Mounted Runway Threshold Lights with Base to Remain, Removed

– per Each

Item SS-301-5.10 Existing Generator and Transfer Switch, Removed – per Lump Sum

Item SS-301-5.11 Existing Airport Rotating Beacon Fixture, Removed - per Lump Sum

Item SS-301-5.12 Existing Based Mounted Runway Edge Light with Base to Remain, Removed – per Each

Item SS-301-5.13 Conduit or Duct Bank, Cleared – per Linear Foot

Item SS-301-5.14 Abandoned Sign Base, Removed – per Each

Item SS-301-5.15 Existing Handhole, Removed – per Each

END OF ITEM SS-301

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 10 of 23

Addendum No. 3 SS-301-5 Garver Project No. 2400880

PAGE INTENTIONALLY LEFT BLANK

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 11 of 23

Jack Brooks Regional Airport AC 150/5370-10H

BPT Airfield Lighting Rehabilitation 12/21/2018

Addendum No. 3 L-115-1 Garver Project No. 2400880

ITEM L-115 ELECTRICAL MANHOLES AND JUNCTION STRUCTURES

DESCRIPTION

115-1.1 This item shall consist of electrical manholes and junction structures (hand holes, pull boxes, junction cans, etc.) installed per this specification, at the indicated locations and conforming to the lines, grades and dimensions shown on the plans or as required by the RPR. This item shall include the installation of each electrical manhole and/or junction structures with all associated excavation, backfilling, sheeting and bracing, concrete, reinforcing steel, ladders, appurtenances, testing, dewatering and restoration of surfaces to the satisfaction of the RPR.

Refer to Item SS-301 for additional electrical demolition work requirements.

EQUIPMENT AND MATERIALS

115-2.1 General.

a. All equipment and materials covered by referenced specifications shall be subject to acceptance through manufacturer’s certification of compliance with the applicable specification when so requested by the RPR.

b. Manufacturer’s certifications shall not relieve the Contractor of the responsibility to provide materials per these specifications. Materials supplied and/or installed that do not comply with these specifications shall be removed (when directed by the RPR) and replaced with materials that comply with these specifications at the Contractor’s cost.

c. All materials and equipment used to construct this item shall be submitted to the RPR for approval prior to ordering the equipment. Submittals consisting of marked catalog sheets or shop drawings shall be provided. Submittal data shall be presented in a clear, precise and thorough manner. Original catalog sheets are preferred. Photocopies are acceptable provided they are as good a quality as the original.

Clearly and boldly mark each copy to identify products or models applicable to this project. Indicate all optional equipment and delete any non-pertinent data. Submittals for components of electrical equipment and systems shall identify the equipment to which they apply on each submittal sheet. Markings shall be made bold and clear with arrows or circles (highlighting is not acceptable). The Contractor is solely responsible for delays in the project that may accrue directly or indirectly from late submissions or resubmissions of submittals.

d. The data submitted shall be sufficient, in the opinion of the RPR, to determine compliance with the plans and specifications. The Contractor’s submittals shall be electronically submitted in pdf format, tabbed by specification section. The RPR reserves the right to reject any and all equipment, materials or procedures that do not meet the system design and the standards and codes, specified in this document.

e. All equipment and materials furnished and installed under this section shall be guaranteed against defects in materials and workmanship for a period of at least twelve (12) months from the date of final acceptance by the Owner. The defective materials and/or equipment shall be repaired or replaced, at the Owner’s discretion, with no additional cost to the Owner.

115-2.2 Concrete structures. Concrete shall be proportioned, placed, and cured per Item P-610, Concrete for Miscellaneous Structures. Cast-in-place concrete structures shall be as shown on the plans.

115-2.3 Precast concrete structures. Precast concrete structures shall be furnished by a plant meeting National Precast Concrete Association Plant Certification Program or another engineer approved third party certification program. Provide precast concrete structures where shown on the plans.

Precast concrete structures shall be an approved standard design of the manufacturer. Precast units shall have mortar or bitumastic sealer placed between all joints to make them watertight. The structure shall be designed to withstand 100,000 lb. aircraft wheel loads, unless otherwise shown on the plans. Openings or knockouts shall be provided in the structure as detailed on the plans.

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 12 of 23

Addendum No. 3 L-115-2 Garver Project No. 2400880

Threaded inserts and pulling eyes shall be cast in as shown on the plans.

If the Contractor chooses to propose a different structural design, signed and sealed shop drawings, design calculations, and other information requested by the RPR shall be submitted by the Contractor to allow for a full evaluation by the RPR. The RPR shall review per the process defined in the General Provisions.

115-2.4 Junction boxes. Junction boxes shall be L-867 Class 1 (non-load bearing) or L-868 Class 1 (load bearing) airport light bases that are encased in concrete. The light bases shall have a L-894 blank cover, gasket, and stainless steel hardware. All bolts, studs, nuts, lock washers, and other similar fasteners used for the light fixture assemblies must be fabricated from 316L (equivalent to EN 1.4404), 18-8, 410, or 416 stainless steel. If 18-8, 410, or 416 stainless steel is utilized it shall be passivated and be free from any discoloration. Covers shall be 3/8-inch thickness for L-867 and 3/4-inch thickness for L-868. All junction boxes shall be provided with both internal and external ground lugs.

115-2.5 Mortar. The mortar shall be composed of one part of cement and two parts of mortar sand, by volume. The cement shall be per the requirements in ASTM C150, Type I. The sand shall be per the requirements in ASTM C144. Hydrated lime may be added to the mixture of sand and cement in an amount not to exceed 15% of the weight of cement used. The hydrated lime shall meet the requirements of ASTM C206. Water shall be potable, reasonably clean and free of oil, salt, acid, alkali, sugar, vegetable, or other substances injurious to the finished product.

115-2.6 Concrete. Concrete shall be proportioned, placed, and cured per Item P-610, Concrete for Miscellaneous Structures.

115-2.7 Frames and covers. The frames shall conform to one of the following requirements:

a. ASTM A48 Gray iron castings

b. ASTM A47 Malleable iron castings

c. ASTM A27 Steel castings

d. ASTM A283, Grade D Structural steel for grates and frames

e. ASTM A536 Ductile iron castings

f. ASTM A897 Austempered ductile iron castings

All castings specified shall withstand a maximum tire pressure of 250 psi and maximum load of 100,000 lbs.

All castings or structural steel units shall conform to the dimensions shown on the plans and shall be designed to support the loadings specified.

Each frame and cover unit shall be provided with fastening members to prevent it from being dislodged by traffic, but which will allow easy removal for access to the structure.

All castings shall be thoroughly cleaned. After fabrication, structural steel units shall be galvanized to meet the requirements of ASTM A123.

Each cover shall have the word “ELECTRIC” or other approved designation cast on it. Each frame and cover shall be as shown on the plans or approved equivalent. No cable notches are required.

Each manhole shall be provided with a “DANGER -- PERMIT-REQUIRED CONFINED SPACE, DO NOT ENTER” safety warning sign as detailed in the Contract Documents and in accordance with OSHA

1910.146 (c)(2).

115-2.8 Ladders. Ladders, if specified, shall be galvanized steel or as shown on the plans.

(IFB 26-024/MR) Jack Brooks Regional Airport Airfield Lighting Rehabilitation - ADDENDUM NO. 3 Page 13 of 23

Addendum No. 3 L-115-3 Garver Project No. 2400880

115-2.9 Reinforcing steel. All reinforcing steel shall be deformed bars of new billet steel meeting the requirements of ASTM A615, Grade 60.

115-2.10 Bedding/special backfill. Bedding or special backfill shall be as shown on the plans.

115-2.11 Flowable backfill. Flowable material used to backfill shall conform to the requirements of Item P- 153, Controlled Low Strength Material.

115-2.12 Cable trays. Cable trays shall be of galvanized steel. Cable trays shall be located as shown on the plans.

115-2.13 Plastic conduit. Plastic conduit shall comply with Item L-110, Airport Underground Electrical Duct Banks and Conduits.

115-2.14 Conduit terminators. Conduit terminators shall be pre-manufactured for the specific purpose and sized as required or as shown on the plans.

115-2.15 Pulling-in irons. Pulling-in irons shall be manufactured with 7/8-inch diameter hot-dipped galvanized steel or stress-relieved carbon steel roping designed for concrete applications (7 strand, ½-inch diameter with an ultimate strength of 270,000 psi). Where stress-relieved carbon steel roping is used, a rustproof sleeve shall be installed at the hooking point and all exposed surfaces shall be encapsulated with a polyester coating to prevent corrosion.

115-2.16 Ground rods. Ground rods shall be one piece, copper or copper clad steel. The ground rods shall be of the length and diameter specified on the plans, but in no case shall they be less than 8 feet long nor less than 5/8 inch in diameter.

CONSTRUCTION METHODS

115-3.1 Unclassified excavation. It is the Contractor’s responsibility to locate existing utilities within the work area prior to excavation. Damage to utility lines, through lack of care in excavating, shall be repaired or replaced to the satisfaction of the RPR without additional expense to the Owner.

The Contractor shall perform excavation for structures and structure footings to the lines and grades or elevations shown on the plans or as staked by the RPR. The excavation shall be of sufficient size to permit the placing of the full width and length of the structure or structure footings shown.

All excavation shall be unclassified and shall be considered incidental to Item L-115. Dewatering necessary for structure installation and erosion per federal, state, and local requirements is incidental to Item L-115.

Boulders, logs and all other objectionable material encountered in excavation shall be removed. All rock and other hard foundation material shall be cleaned of all loose material and cut to a firm surface either level, stepped or serrated, as directed by the RPR. All seams, crevices, disintegrated rock and thin strata shall be removed. When concrete is to rest on a surface other than rock, special care shall be taken not to disturb the bottom of the excavation. Excavation to final grade shall not be made until just before the concrete or reinforcing is to be placed.

The Contractor shall provide all bracing, sheeting and shoring necessary to implement and protect the excavation and the structure as required for safety or conformance to governing laws. The cost of bracing, sheeting and shoring shall be included in the unit price bid for the structure.

Unless otherwise provided, bracing, sheeting and shoring involved in the construction of this item shall be removed by the Contractor after the completion of the structure. Removal shall be effected in a manner that will not disturb or mar finished masonry. The cost of removal shall be included in the unit price bid for the structure.

After each excavation is completed, the Contractor shall notify the RPR. Structures shall be placed after the RPR has approved the depth of the excavation and the suitability of the foundation material.

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Prior to installation the Contractor shall provide a minimum of 6 inches (150 mm) of sand or a material approved by the RPR as a suitable base to receive the structure. The base material shall be compacted and graded level and at proper elevation to receive the structure in proper relation to the conduit grade or ground cover requirements, as indicated on the plans.

115-3.2 Concrete structures. Concrete structures shall be built on prepared foundations conforming to the dimensions and form indicated on the plans. The concrete and construction methods shall conform to the requirements specified in Item P-610. Any reinforcement required shall be placed as indicated on the plans and shall be approved by the RPR before the concrete is placed.

115-3.3 Precast unit installations. Precast units shall be installed plumb and true. Joints shall be made watertight by use of sealant at each tongue-and-groove joint and at roof of manhole. Excess sealant shall be removed and severe surface projections on exterior of neck shall be removed.

115-3.4 Placement and treatment of castings, frames and fittings. All castings, frames and fittings shall be placed in the positions indicated on the Plans or as directed by the RPR and shall be set true to line and to correct elevation. If frames or fittings are to be set in concrete or cement mortar, all anchors or bolts shall be in place and position before the concrete or mortar is placed. The unit shall not be disturbed until the mortar or concrete has set.

Field connections shall be made with bolts, unless indicated otherwise. Welding will not be permitted unless shown otherwise on the approved shop drawings and written approval is granted by the casting manufacturer. Erection equipment shall be suitable and safe for the workman. Errors in shop fabrication or deformation resulting from handling and transportation that prevent the proper assembly and fitting of parts shall be reported immediately to the RPR and approval of the method of correction shall be obtained.

Approved corrections shall be made at Contractor’s expense.

Anchor bolts and anchors shall be properly located and built into connection work. Bolts and anchors shall be preset by the use of templates or such other methods as may be required to locate the anchors and anchor bolts accurately.

Pulling-in irons shall be located opposite all conduit entrances into structures to provide a strong, convenient attachment for pulling-in blocks when installing cables. Pulling-in irons shall be set directly into the concrete walls of the structure.

115-3.5 Installation of ladders. Ladders shall be installed such that they may be removed if necessary.

Mounting brackets shall be supplied top and bottom and shall be cast in place during fabrication of the structure or drilled and grouted in place after erection of the structure.

115-3.6 Removal of sheeting and bracing. In general, all sheeting and bracing used to support the sides of trenches or other open excavations shall be withdrawn as the trenches or other open excavations are being refilled. That portion of the sheeting extending below the top of a structure shall be withdrawn, unless otherwise directed, before more than 6 inches of material is placed above the top of the structure and before any bracing is removed. Voids left by the sheeting shall be carefully refilled with selected material and rammed tight with tools especially adapted for the purpose or otherwise as may be approved.

The RPR may direct the Contractor to delay the removal of sheeting and bracing if, in his judgment, the installed work has not attained the necessary strength to permit placing of backfill.

115-3.7 Backfilling. After a structure has been completed, the area around it shall be backfilled in horizontal layers not to exceed 6 inches in thickness measured after compaction to the density requirements in Item P-152. Each layer shall be deposited all around the structure to approximately the same elevation.

The top of the fill shall meet the elevation shown on the plans or as directed by the RPR.

Backfill shall not be placed against any structure until approval is given by the RPR. In the case of concrete, such approval shall not be given until tests made by the laboratory under supervision of the RPR establish that the concrete has attained sufficient strength to provide a factor of safety against damage or strain in withstanding any pressure created by the backfill or the methods used in placing it.

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Addendum No. 3 L-115-5 Garver Project No. 2400880

Where required, the RPR may direct the Contractor to add, at his own expense, sufficient water during compaction to assure a complete consolidation of the backfill. The Contractor shall be responsible for all damage or injury done to conduits, duct banks, structures, property or persons due to improper placing or compacting of backfill.

115-3.8 Connection of duct banks. To relieve stress of joint between concrete-encased duct banks and structure walls, reinforcement rods shall be placed in the structure wall and shall be formed and tied into duct bank reinforcement at the time the duct bank is installed.

115-3.9 Grounding. A ground rod shall be installed in the floor of all concrete structures so that the top of rod extends 6 inches above the floor. The ground rod shall be installed within one foot of a corner of the concrete structure. Ground rods shall be installed prior to casting the bottom slab. Where the soil condition does not permit driving the ground rod into the earth without damage to the ground rod, the Contractor shall drill a 4-inch diameter hole into the earth to receive the ground rod. The hole around the ground rod shall be filled throughout its length, below slab, with Portland cement grout. Ground rods shall be installed in precast bottom slab of structures by drilling a hole through bottom slab and installing the ground rod. Bottom slab penetration shall be sealed watertight with Portland cement grout around the ground rod.

A grounding bus of 4/0 bare stranded copper shall be exothermically bonded to the ground rod and loop the concrete structure walls. The ground bus shall be a minimum of one foot above the floor of the structure and separate from other cables. No. 2 American wire gauge (AWG) bare copper pigtails shall bond the grounding bus to all cable trays and other metal hardware within the concrete structure. Connections to the grounding bus shall be exothermic. If an exothermic weld is not possible, connections to the grounding bus shall be made by using connectors approved for direct burial in soil or concrete per UL 467. Hardware connections may be mechanical, using a lug designed for that purpose.

115-3.10 Cleanup and repair. After erection of all galvanized items, damaged areas shall be repaired by applying a liquid cold-galvanizing compound per MIL-P-21035. Surfaces shall be prepared and compound applied per the manufacturer’s recommendations.

Prior to acceptance, the entire structure shall be cleaned of all dirt and debris.

115-3.11 Restoration. After the backfill is completed, the Contractor shall dispose of all surplus material, dirt and rubbish from the site. The Contractor shall restore all disturbed areas equivalent to or better than their original condition. All sodding, grading and restoration shall be considered incidental to the respective Item L-115 pay item.

The Contractor shall grade around structures as required to provide positive drainage away from the structure.

Areas with special surface treatment, such as roads, sidewalks, or other paved areas shall have backfill compacted to match surrounding areas, and surfaces shall be repaired using materials comparable to original materials.

Following restoration of all trenching near airport movement surfaces, the Contractor shall thoroughly visually inspect the area for foreign object debris (FOD), and remove any such FOD that is found. This FOD inspection and removal shall be considered incidental to the pay item of which it is a component part.

After all work is completed, the Contractor shall remove all tools and other equipment, leaving the entire site free, clear and in good condition.

115-3.12 Inspection. Prior to final approval, the electrical structures shall be thoroughly inspected for conformance with the plans and this specification. Any indication of defects in materials or workmanship shall be further investigated and corrected. The earth resistance to ground of each ground rod shall not exceed 25 ohms. Each ground rod shall be tested using the fall-of-potential ground impedance test per American National Standards Institute / Institute of Electrical and Electronic Engineers (ANSI/IEEE) Standard 81. This test shall be performed prior to establishing connections to other ground electrodes.

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Addendum No. 3 L-115-6 Garver Project No. 2400880

115-3.13 Manhole elevation adjustments. The Contractor shall adjust the tops of existing manholes in areas designated in the Contract Documents to the new elevations shown. The Contractor shall be responsible for determining the exact height adjustment required to raise or lower the top of each manhole to the new elevations. The existing top elevation of each manhole to be adjusted shall be determined in the field and subtracted/added from the proposed top elevation.

The Contractor shall remove/extend the existing top section or ring and cover on the manhole structure or manhole access. The Contractor shall install precast concrete sections or grade rings of the required dimensions to adjust the manhole top to the new proposed elevation or shall cut the existing manhole walls to shorten the existing structure, as required by final grades. The Contractor shall reinstall the manhole top section or ring and cover on top and check the new top elevation.

The Contractor shall construct a concrete slab around the top of adjusted structures located in graded areas that are not to be paved. The concrete slab shall conform to the dimensions shown on the plans.

115-3.14 Duct extension to existing ducts. Where existing concrete encased ducts are to be extended, the duct extension shall be concrete encased plastic conduit. The fittings to connect the ducts together shall be standard manufactured connectors designed and approved for the purpose. The duct extensions shall be installed according to the concrete encased duct detail and as shown on the plans.

METHOD OF MEASUREMENT

115-4.1 Electrical manholes and junction structures shall be measured by each unit completed in place and accepted. The following items shall be included in the price of each unit: All required excavation and dewatering; sheeting and bracing; all required backfilling with on-site materials; restoration of all surfaces and finished grading and turfing; all required connections; temporary cables and connections; and ground rod testing

115-4.2 Airfield Handhole Cover Replacements shall be measured by the completed unit installed, in place, completed, and accepted. Separate measurement shall not be made for the various types and sizes.

BASIS OF PAYMENT

115-5.1 The accepted quantity of electrical manholes and junction structures will be paid for at the Contract unit price per each, complete and in place. This price shall be full compensation for furnishing all materials and for all preparation, excavation, backfilling and placing of the materials, furnishing and installation of appurtenances and connections to duct banks and other structures as may be required to complete the item as shown on the plans and for all labor, equipment, tools and incidentals necessary to complete the structure.

115-5.2 Payment shall be made by the contract unit price for Airfield Handhole Cover Replacement, per the type and dimension installed, complete and in-place. This price shall be full compensation for furnishing all materials and for all preparation, assembly, and installation of these materials, and for all labor, equipment, tools, and incidentals necessary, including but not limited to, spacers, concrete, rebar, dewatering, excavating, backfill, topsoil, sodding and pavement restoration, where required, to complete this item as shown in the plans and to the satisfaction of the RPR.

Payment will be made under:

Item L-115-5.1 Electrical Junction Structure, L-867 Class 1, Size 16” Diameter by 24” Depth - Per Each

Item L-115-5.2 Electrical Junction Structure Plaza, Two -867 Class 1, Size 16” Diameter by 24” Depth Cans – Per Each

Item L-115-5.3 3’x 4’ Airfield Handhole Cover Replacement – Per Each

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Addendum No. 3 L-115-7 Garver Project No. 2400880

REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

American National Standards Institute / Insulated Cable Engineers Association (ANSI/ICEA)

ANSI/IEEE STD 81 IEEE Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System

Advisory Circular (AC)

AC 150/5345-7 Specification for L-824 Underground Electrical Cable for Airport Lighting Circuits

AC 150/5345-26 Specification for L-823 Plug and Receptacle, Cable Connectors

AC 150/5345-42 Specification for Airport Light Bases, Transformer Housings, Junction Boxes, and Accessories

AC 150/5340-30 Design and Installation Details for Airport Visual Aids

AC 150/5345-53 Airport Lighting Equipment Certification Program

Commercial Item Description (CID)

A-A 59544 Cable and Wire, Electrical (Power, Fixed Installation)

ASTM International (ASTM)

ASTM A27 Standard Specification for Steel Castings, Carbon, for General Application

ASTM A47 Standard Specification for Ferritic Malleable Iron Castings

ASTM A48 Standard Specification for Gray Iron Castings

ASTM A123 Standard Specification for Zinc (Hot Dip Galvanized) Coatings on Iron and Steel Products

ASTM A283 Standard Specification for Low and Intermediate Tensile Strength Carbon Steel Plates

ASTM A536 Standard Specification for Ductile Iron Castings

ASTM A615 Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

ASTM A897 Standard Specification for Austempered Ductile Iron Castings

ASTM C144 Standard Specification for Aggregate for Masonry Mortar

ASTM C150 Standard Specification for Portland Cement

ASTM C206 Standard Specification for Finishing Hydrated Lime

FAA Engineering Brief (EB)

EB #83 In Pavement Light Fixture Bolts

Mil Spec

MIL-P-21035 Paint High Zinc Dust Content, Galvanizing Repair

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National Fire Protection Association (NFPA)

NFPA-70 National Electrical Code (NEC)

END OF ITEM L-115

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1. COORDINATION

A. CONTRACTOR PROGRESS MEETINGS - THE OWNER, ENGINEER AND CONTRACTOR WILL HOLD PROGRESS MEETINGS ON A COORDINATED SCHEDULE DURING CONSTRUCTION. OPERATIONAL SAFETY WILL BE A STANDING AGENDA ITEM IN SUCH MEETINGS.

B. SCOPE OR SCHEDULE CHANGES - THE OWNER AND/OR ENGINEER WILL CALL SUCH COORDINATION CONFERENCES AS MAY SEEM EXPEDIENT TO HIM FOR THE PURPOSE OF ASSURING COORDINATION OF THE WORK COVERED BY THIS CONTRACT AND/OR SCOPE OR SCHEDULE CHANGES. THE CONTRACTOR

SHALL ATTEND ALL SUCH CONFERENCES.

C. FAA ATO COORDINATION - COORDINATION WITH THE FAA ATO FOR THE REQUIRED SHUTDOWN OF FAA FACILITIES FOR THIS PROJECT HAS BEEN COMPLETED. THE FAA ATO CONTACT FOR THIS PROJECT IS BRUCE HYERS, (615) 717-8592, FAA LAKE CHARLES TECH OPS MANAGER.

2. PHASING

DURING PERFORMANCE OF THIS PROJECT, THE AIRPORT…