4V1 - Airfield Lighting _ Signage Improvements - Addendum No. 2.pdf

188 Inverness Drive W

Suite 500

Englewood, CO 80112

TEL 303.721.6932

www.GarverUSA.com

ADDENDUM NO. 2

Date: August 6, 2024

Project Name: Airfield Lighting & Signage Rehabilitation

Owner: Spanish Peaks Airfield

Owner Project No.: 3-08-0079-014-2024

Garver Project No. 24A25200

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. PRE-BID MEETING MINUTES

1. The Pre-Bid Meeting Minutes & Sign-In sheet are attached.

B. SPECIFICATIONS

1. Revised Specification T-901 Seeding as follows:

a. Updated “Seed Properties and Rate of Application” table to include revised seeding mix.

By:

Roy Daniels, P.E.

Project Manager

Attachments:

1. Pre-Bid Meeting Minutes

2. T-901 Seeding Specification

END OF ADDENDUM NO. 2

188 Inverness Drive W

Suite 500

Englewood, CO 80112

TEL 303.721.6932

www.GarverUSA.com

Pre-Bid Meeting - Agenda

Date: July 25, 2024

Location: Spanish Peaks Airfield

RE: 4V1 – Airfield Lighting & Signage Improvements

Pre-Bid Meeting

1.0 Introduction & Roles

1. Attendees to sign in.

2.0 Bidding Procedures

1. Bids will be received until 1:00 PM, Thursday August 8th, 2024 via Bid Net Direct

a. https://www.bidnetdirect.com/colorado/huerfano-county-government

b. RFP-24-02

c. Any bids received after closing time will be returned and unopened.

d. The bid opening for this project will be held virtually via Microsoft Teams. A link for the virtual bid opening will be provided at a later date.

2. Reference instructions for Bidders for all bidding requirements

a. Bid Form/Proposal

b. Bid Bond

c. List of Proposed Subcontractors

d. Qualifications Statement

e. DBE Participation Reporting

f. Bidder Certifications

3. A bid bond or cashier’s check must accompany the bid and be made payable to the Owner in the amount of 5% of the Bidder’s maximum bid price. Bid security will be returned after the Owner and the accepted bidder have executed the contract.

4. Technical questions concerning the plans and specifications should be directed to Roy Danels, PE at RVDaniels@GarverUSA.com.

a. No interpretation of the Contract Documents will be made orally.

b. The Engineer must receive written request for interpretation by 5:00 PM on Saturday

August 3rd, 2024. Questions received after this date may not be answered.

c. The final addenda shall be issued at minimum 48 hours prior to the opening of bids’ date and time.

https://www.bidnetdirect.com/colorado/huerfano-county-government mailto:RVDaniels@GarverUSA.com

4V1 – Pre-Bid Meeting

07/25/2024

3.0 Federal Provisions

1. Federal Funding

2. The DBE goal is 3.8%.

3. Davis Bacon Wage Rates

4. Federal Certifications

4.0 Bid Schedules and Alternates

1. Schedule 1 – Base Bid

a. Demolition of Existing Blast Pad

b. Demolition of Existing Road

c. Pavement Marking Removal

d. Installation of New Wind Cone & Segmented Circle

e. Replace Existing Guidance Sign Panels

f. Installation of New Signs & Runway End / Threshold Lights

g. Earthwork

h. Seeding

2. Schedule 1 – Additive Alternate

a. Installation of New Runway End Identifier Lights (REILs)

b. Disconnection of Existing PAPI Circuit

c. Vault Modifications

d. Installation of New Cables to PAPI

5.0 Schedule for Completion

1. 28 Calendar Days for project total substantial completion.

*Phase 2 shall begin at the start of Phase 1

**Phase 3A & 3B shall begin after the conclusion of Phase 2 and can not be constructed concurrently with each other.

Description Substantial Completion

Phase 1 28 Calendar Days

Phase 2 7 Calendar Days*

Phase 3A 10 Calendar Days**

Phase 3B 10 Calendar Days**

Total Project 28 Calendar Days

2. Phasing Work Breakdown:

• Phase 1 o Perform electrical improvements outside of the Runway 9-27 Runway Safety Area (RSA)

▪ Installation of new Runway End Identifier Lighting System

▪ Conduit

▪ Wind Cone & Segmented Circle

▪ Runway 2-20 Guidance Signs

4V1 – Pre-Bid Meeting

07/25/2024

• Phase 2 o Perform electrical improvements within the Runway 9-27 RSA

▪ Runway Threshold Lights

▪ Conduit Replacement

▪ Blast Pad and Service Road Demolition

▪ Backfill & Grading

▪ Seeding

▪ Pavement Marking Installation

• Phase 3A o Perform electrical improvements on Taxiway A & A1 outside of the RSA

▪ Sign Panel Replacement

▪ New Guidance Signs

▪ Runway End Identifier Lighting System

• Phase 3B o Perform electrical improvements on Taxiway A2 outside of the RSA

▪ Sign Panel Replacement

▪ New Guidance Signs and Conduit

3. Liquidated Damages

a. $ 1,000.00 for each day that expires after the substantial completion in each phase until the Work is substantially complete.

6.0 Construction Schedule

1. Anticipated NTP:

2. Contract Award:

3. Most of the funding is in place; remaining funding will be offered based on award.

7.0 Questions

Spanish Peaks Airfield AC 150/5370-10H

Airfield Lighting & Signage Improvements 12/21/2018

AIP No. 3-08-0079-014-2024

95% Final Design T-901-1 Garver Project No. 24A25200

ITEM T-901 SEEDING

DESCRIPTION

901-1.1 This item shall consist of soil preparation, seeding the areas shown on the plans or as directed by the RPR in accordance with these specifications.

MATERIALS

901-2.1 Seed. The species and application rates of grass, legume, and cover-crop seed furnished shall be those stipulated herein. Seed shall conform to the requirements of Federal Specification JJJ-S-181, Federal Specification, Seeds, Agricultural.

Seed shall be furnished separately or in mixtures in standard containers labeled in conformance with the Agricultural Marketing Service (AMS) Seed Act and applicable state seed laws with the seed name, lot number, net weight, percentages of purity and of germination and hard seed, and percentage of maximum weed seed content clearly marked for each kind of seed. The Contractor shall furnish the RPR duplicate signed copies of a statement by the vendor certifying that each lot of seed has been tested by a recognized laboratory for seed testing within six (6) months of date of delivery. This statement shall include: name and address of laboratory, date of test, lot number for each kind of seed, and the results of tests as to name, percentages of purity and of germination, and percentage of weed content for each kind of seed furnished, and, in case of a mixture, the proportions of each kind of seed. Wet, moldy, or otherwise damaged seed will be rejected.

Seeds shall be applied as follows:

Seed Properties and Rate of Application

Seed Name

Genus, Species Percent of Seed Mix

Total PLS

LBs in Mix

(sds/ac x Acres) / Seeds/Lb

PLS Seed Rate

(lbs / ac)

Grama, Sideoats (El Reno, Niner, Vaughn, Butte)

Bouteloua Curtipendula

15 0.99 2.74

Wheatgrass, Western (Arriba, Barton, Flintlock, Rosana)

Pascopyrum Smithiii

15 1.65 4.59

Gram, Blue (Alma, Bad River, Hachita, Lovington)

Bouteloua Gracilis

15 0.26 0.74

Green Needlegrass (Lodorm) Nassella Viridula

10 0.69 1.93

Bottlebrush Squirreltail (Tusas) Elymus

Elymoides 15 0.98 2.73

Prairie Clover, Purple (Kanab) Dalea Purpurea

Purpurea 10 0.42 1.16

Globemallow, Scarlet Sphaeralcea

Coccinea 10 0.25 0.70

Hairy False Goldenaster Heterotheca

Villosa 10 0.20 0.54

Seeding shall be performed during the period between December 1 and May 1 inclusive, unless otherwise approved by the RPR.

Addendum No. 2

95% Final Design T-901-2 Garver Project No. 24A25200

901-2.2 Lime. Not required.

901-2.3 Fertilizer. Not required.

901-2.4 Soil for repairs. The soil for fill and topsoiling of areas to be repaired shall be at least of equal quality to that which exists in areas adjacent to the area to be repaired. The soil shall be relatively free from large stones, roots, stumps, or other materials that will interfere with subsequent sowing of seed, compacting, and establishing turf, and shall be approved by the RPR before being placed.

CONSTRUCTION METHODS

901-3.1 Advance preparation and cleanup. After grading of areas has been completed and before applying fertilizer and ground limestone, areas to be seeded shall be raked or otherwise cleared of stones larger than 2 inches in any diameter, sticks, stumps, and other debris that might interfere with sowing of seed, growth of grasses, or subsequent maintenance of grass-covered areas. If any damage by erosion or other causes has occurred after the completion of grading and before beginning the application of fertilizer and ground limestone, the Contractor shall repair such damage include filling gullies, smoothing irregularities, and repairing other incidental damage.

An area to be seeded shall be considered a satisfactory seedbed without additional treatment if it has recently been thoroughly loosened and worked to a depth of not less than 5 inches as a result of grading operations and, if immediately prior to seeding, the top 3 inches of soil is loose, friable, reasonably free from large clods, rocks, large roots, or other undesirable matter, and if shaped to the required grade.

When the area to be seeded is sparsely sodded, weedy, barren and unworked, or packed and hard, any grass and weeds shall first be cut or otherwise satisfactorily disposed of, and the soil then scarified or otherwise loosened to a depth not less than 5 inches. Clods shall be broken and the top 3 inches of soil shall be worked into a satisfactory seedbed by discing, or by use of cultipackers, rollers, drags, harrows, or other appropriate means.

901-3.2 Dry application method.

a. Liming. Not required.

b. Fertilizing. Not required.

c. Seeding. Grass seed shall be sown at the rate specified in paragraph 901-2.1 immediately after fertilizing. The fertilizer and seed shall be raked within the depth range stated in the special provisions.

Seeds of legumes, either alone or in mixtures, shall be inoculated before mixing or sowing, in accordance with the instructions of the manufacturer of the inoculant. When seeding is required at other than the seasons shown on the plans or in the special provisions, a cover crop shall be sown by the same methods required for grass and legume seeding.

d. Rolling. After the seed has been properly covered, the seedbed shall be immediately compacted by means of an approved lawn roller, weighing 40 to 65 pounds per foot of width for clay soil (or any soil having a tendency to pack), and weighing 150 to 200 pounds per foot of width for sandy or light soils.

901-3.3 Wet application method.

a. General. The Contractor may elect to apply seed and fertilizer (and lime, if required) by spraying them on the previously prepared seedbed in the form of an aqueous mixture and by using the methods and equipment described herein. The rates of application shall be as specified in the special provisions.

b. Spraying equipment. The spraying equipment shall have a container or water tank equipped with a liquid level gauge calibrated to read in increments not larger than 50 gallons over the entire range of the tank capacity, mounted so as to be visible to the nozzle operator. The container or tank shall also be equipped with a mechanical power-driven agitator capable of keeping all the solids in the mixture in complete suspension at all times until used.

95% Final Design T-901-3 Garver Project No. 24A25200

The unit shall also be equipped with a pressure pump capable of delivering 100 gallons per minute at a pressure of 100 lb / sq inches. The pump shall be mounted in a line that will recirculate the mixture through the tank whenever it is not being sprayed from the nozzle. All pump passages and pipe lines shall be capable of providing clearance for 5/8 inch solids. The power unit for the pump and agitator shall have controls mounted so as to be accessible to the nozzle operator. There shall be an indicating pressure gauge connected and mounted immediately at the back of the nozzle.

The nozzle pipe shall be mounted on an elevated supporting stand in such a manner that it can be rotated through 360 degrees horizontally and inclined vertically from at least 20 degrees below to at least 60 degrees above the horizontal. There shall be a quick-acting, three-way control valve connecting the recirculating line to the nozzle pipe and mounted so that the nozzle operator can control and regulate the amount of flow of mixture delivered to the nozzle. At least three different types of nozzles shall be supplied so that mixtures may be properly sprayed over distance varying from 20 to 100 feet. One shall be a close-range ribbon nozzle, one a medium-range ribbon nozzle, and one a long-range jet nozzle. For case of removal and cleaning, all nozzles shall be connected to the nozzle pipe by means of quick-release couplings.

In order to reach areas inaccessible to the regular equipment, an extension hose at least 50 feet in length shall be provided to which the nozzles may be connected.

c. Mixtures. Lime, if required, shall be applied separately, in the quantity specified, prior to the fertilizing and seeding operations. Not more than 220 pounds of lime shall be added to and mixed with each 100 gallons of water. Seed and fertilizer shall be mixed together in the relative proportions specified, but not more than a total of 220 pounds of these combined solids shall be added to and mixed with each 100 gallons of water.

All water used shall be obtained from fresh water sources and shall be free from injurious chemicals and other toxic substances harmful to plant life. The Contractor shall identify to the RPR all sources of water at least two (2) weeks prior to use. The RPR may take samples of the water at the source or from the tank at any time and have a laboratory test the samples for chemical and saline content. The Contractor shall not use any water from any source that is disapproved by the RPR following such tests.

All mixtures shall be constantly agitated from the time they are mixed until they are finally applied to the seedbed. All such mixtures shall be used within two (2) hours from the time they were mixed or they shall be wasted and disposed of at approved locations.

d. Spraying. Lime, if required, shall be sprayed only upon previously prepared seedbeds. After the applied lime mixture has dried, the lime shall be worked into the top 3 inches, after which the seedbed shall again be properly graded and dressed to a smooth finish.

Mixtures of seed and fertilizer shall only be sprayed upon previously prepared seedbeds on which the lime, if required, shall already have been worked in. The mixtures shall be applied by means of a high-pressure spray that shall always be directed upward into the air so that the mixtures will fall to the ground like rain in a uniform spray. Nozzles or sprays shall never be directed toward the ground in such a manner as might produce erosion or runoff.

Particular care shall be exercised to ensure that the application is made uniformly and at the prescribed rate and to guard against misses and overlapped areas. Proper predetermined quantities of the mixture in accordance with specifications shall be used to cover specified sections of known area.

Checks on the rate and uniformity of application may be made by observing the degree of wetting of the ground or by distributing test sheets of paper or pans over the area at intervals and observing the quantity of material deposited thereon.

On surfaces that are to be mulched as indicated by the plans or designated by the RPR, seed and fertilizer applied by the spray method need not be raked into the soil or rolled. However, on surfaces on which mulch is not to be used, the raking and rolling operations will be required after the soil has dried.

95% Final Design T-901-4 Garver Project No. 24A25200

901-3.4 Maintenance of seeded areas. The Contractor shall protect seeded areas against traffic or other use by warning signs or barricades, as approved by the RPR. Surfaces gullied or otherwise damaged following seeding shall be repaired by regrading and reseeding as directed. The Contractor shall mow, water as directed, and otherwise maintain seeded areas in a satisfactory condition until final inspection and acceptance of the work.

When either the dry or wet application method outlined above is used for work done out of season, it will be required that the Contractor establish a good stand of grass of uniform color and density to the satisfaction of the RPR. A grass stand shall be considered adequate when bare spots are one square foot or less, randomly dispersed, and do not exceed 3% of the area seeded.

METHOD OF MEASUREMENT

901-4.1 The quantity of seeding to be paid for shall be the number of units acre measured on the ground surface, completed and accepted.

BASIS OF PAYMENT

901-5.1 Payment shall be made at the contract unit price per acre or fraction thereof, which price and payment shall be full compensation for furnishing and placing all material and for all labor, equipment, tools, and incidentals necessary to complete the work prescribed in this item.

Payment will be made under:

Item T-901-5.1 Seeding - per acre

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.

ASTM International (ASTM)

ASTM C602 Standard Specification for Agricultural Liming Materials

Federal Specifications (FED SPEC)

FED SPEC JJJ-S-181, Federal Specification, Seeds, Agricultural

Advisory Circulars (AC)

AC 150/5200-33 Hazardous Wildlife Attractants on or Near Airports

FAA/United States Department of Agriculture

Wildlife Hazard Management at Airports, A Manual for Airport Personnel

END OF ITEM T-901