Amendment 1 Attachment 1.docx

Forest Service Carson National Forest Supervisor's Office 208 Cruz Alta Rd Taos NM 87571 575-758-6200

File Code: 7100 Date: February 26, 2024 Route To:

Subject: Amendment No. 1, Attachment 1 GAOA-Echo Amphitheater Recreation Site Development Phase II Solicitation No. 127EAX24R0005, Request for Information (RFI) Responses

The Carson National Forest hosted a pre-bid site visit for the subject project on 02/13/2024. This document shall serve as an official response to questions provided by potential bidders following the site visit.

RFI Questions:

1. Water for compaction? The project could require between 30-50k gallons to meet optimum moisture content per specifications. Will this be available at the site

RESPONSE: The only water on site is the drinking water system for the campground. The specifications note that the water system may be utilized by the contractor for various uses, however per the estimated volume of water noted in the question, the water system cannot sustain that level of usage. Contractors shall account for hauling their own water on site for construction purposes through Line Item 00151 Mobilization.

2. What will be the estimated tree removal Qty, per site visit?

RESPONSE: Clearing and grubbing for this project will be inclusive of Pinon/Juniper trees as well as sagebrush. Vegetation is dense in some areas and others will require removal of individual trees. For bidding purposes contractors shall account for the removal of 100 Pinon/Juniper trees through line item 02102.01 Clearing & Grubbing.

3. How will contractors adequately size conductors of secondary lines per specifications? Is an electrical engineers certification required?

RESPONSE: Electrical Engineering Certification is not required. The recipient of this award will be be required stake the route of all secondary lines from the MDP to each campsite. At that point they will be required to have a certified electrician (within the state of New Mexico) that will properly size conductors per the proposed layout noted above. Contractor must provide justification for sizing, COR will verify that the material being installed is in correspondence with the certified electrician’s guidance.

4. What size of Main Distribution Panel (MDP) will the forest service require for this project? Who will properly engineer the unit? Who assumes the liability for improper size or typeRESPONSE: For bidding purposes, MDP shall be an 900 amp MDP with (9) 100-amp breakers to serve each of the 9 campsites. Upon receipt of the award, as noted in question 3, a certified electrician shall verify the correct size of the MDP. Detailed justification shall be submitted to the USFS including but not limited to a schematic complete with calculations detailing potential voltage loss over the length of individual secondary legs. As it will be required of the primary contractor to procure a licensed electrician for sizing, liability for improper sizing will be on the primary.

5. Grounding requirements of MDP?

RESPONSE: MDP shall be grounded in accordance with local electrical codes/standards. Contractor shall provide the USFS with documentation showing that the unit is properly installed and grounded.

6. Is the Electrical system single phase or three phase?

7. Is a Main Disconnect required to meet current codes?

RESPONSE: NORA Electric lines are believed to be single phase. Contractor to confirm with Elec. Company.

RESPONSE: Yes, via use of a certified electrician.

8. Are you requiring New Mexico licensed Electrical and Mechanical contractors to perform the plumbing and Electrical work?

RESPONSE: New Mexico licensed Electrical contractor will be required for electrical work, licensed plumbers are not. As it will be required of the primary contractor the procure a certified electrician, work delegated to the electrician will be their responsibility with the liability of their work falling on the primary.

9. Can the drawings include a surveyor plot table (Northing and Easting Coordinates) to include a control point on overall site drawings? This will aid in surveying calculations for Prebid purposes and verify the drawing scale.

RESPONSE: This project was not designed with the use of a survey. There is no data available to share regarding this question. Additionally, it is noted in the drawings that plans are “not to scale.” After the contract is awarded, the contractor may survey the site so to stake out routes for trenching and different contract items.

10. Document “Section 02316 – Excavation Trenching and Backfilling for Utility Systems” appears to be corrupted and will no launch in Microsoft word. Can this file be republished in the newest word format or .PDF file format?

RESPONSE: Section 02316 will be included as an attachment in this response document.

NOTE: The excavation for placement of the underground distribution electrical line will require the contractor to trench through asphalt near the campground entrance. The following question was posed at the site visit on 02/13/2024:

“Can a concrete valley gutter be installed where the pavement is cut out as opposed to patching with asphalt cold mix?”

RESPONSE: Pavement shall be patched with asphalt cold mix.

SECTION 02100

TIMBER RETAINING WALLS & GRAVEL PAD

PART 1 - GENERAL

10.1 SUMMARY

This work shall consist of the construction of timber retaining walls around designated permitters of the Ramada shelters. Timber wall shall be stabilized with #3 rebar & 1/2" x 12” Lag Bolts to maintain stability and structural integrity. This work will also include the construction of a gravel drainage pad between the existing Ramada concrete slab and the new retaining wall.

10.2 MEASUREMENT

A. Timber ties will be measured per unit. One unit is defined as one (1) 7”x9”x8’ tie.

B. Gravel will be measured in cubic yards.

C. #3 Rebar & 1/2" x 12” Lag Bolts will be incidental to Timber Ties in item A.

D. Quantities of timber ties will be the number of individual ties utilized for the construction of one (1) wall. The phrase one (1) wall is defined as the entire wall designated for each respective shelter.

Quantities of gravel will be the total volume of gravel (Cubic Yards) needed to construct the entire gravel pad designated for each respective shelter.

E. The actual quantities will be paid for at the contract unit price for each pay item shown in the Schedule of items. Actual quantities are defined as the actual physical quantity of material needed to accomplish the work outlined in this section to deliver a product that is both safe and acceptable. If construction requires a higher quantity of material than what has been shown in the Schedule of items, contractor shall coordinate with the CO for approval prior to construction and/or purchasing and billing.

PART 2 – PRODUCTS

A. The timbers shall be treated timber ties. Ties shall be treated with Copper Nathenate. Nominal dimension shall be 7” x 9” x 8’. The COR will inspect and approve all ties prior to construction. Should the Contractor supply ties that are deemed non-acceptable per the COR, additional ties shall be purchased and supplied at no additional cost to the Federal Government.

B. Gravel shall be 2” Seepage Gravel. Gravel shall be “washed.”

C. Rebar shall be a minimum of #3 rebar.

D. Lag Bolts shall be 1/2" x 12” Galvanized Steel bolts with 1/2" washers.

02100 - 1

TIMBER RETAINING WALLS AND GRAVEL PAD

PART 3 – EXECUTION

3.1 TIMBER RETAINING WALLS

A. All debris, trees, stumps, roots, and other protruding vegetative material within the area of retaining wall, not DESIGNATED to remain, shall be cleared, grubbed, removed, and disposed of only with COR approval.

B. Contractor shall be responsible for ensuring the subgrade is compacted, level and suitable for the placement of timber ties. This will require the contractor to get one (1) soil proctor on the subgrade and compact it to 95% of its maximum compaction. Additionally, the contractor shall perform one (1) compaction test on the subgrade to ensure compaction is met, at which point the same compaction effort will be carried out for all timber retaining walls. NOTE that the proctor and compaction test will occur at a location designated by COR and both shall be representative for all Ramada Shelter retaining walls.

C. Contractor shall stack timbers in a staggered manner to ensure individual ties interlock with each other (rows below and above).

D. Contractor shall install # 3 rebar at 4-foot intervals +/- 6” along the base row of retaining wall. First and last stakes shall not exceed a horizontal distance of 1 FT from outermost edge of wall on both sides. Stakes shall extend to a minimum of 1 FT into existing subgrade. Contractor shall pre-drill ties prior to installation of rebar with a 1/4" drill bit.

E. For all rows above base row, Contractor shall anchor all ties to the row below with 0.5” x 12” Galvanized Steel Lag Bolts complete with 0.5” washers. Lags shall be installed at 4- foot intervals +/- 6” throughout the entire length of wall. First and last lags shall not exceed a horizontal distance of 1 FT from outermost edge of wall. Lag bolts shall be countersunk 0.5” into ties. Contractor shall pre-drill ties prior to installation of lag bolts with a 3/8” drill bit.

F. Where one wall ties into another perpendicularly, corners shall be notched & staked with # 3 rebar. Rebar shall be countersunk 0.5” below wall finish elevation and extend to a minimum of 1 FT into existing subgrade. Contractor shall pre-drill ties prior to installation of rebar with a 1/4" drill bit.

G. All recessed holes shall be sealed with caulking.

H. Length & Height of walls vary depending on respective shelter. Refer to construction drawings.

I. Contractor shall be responsible to ensure top of wall is level with the existing Ramada Shelter concrete slab.

J. Contractor shall place over excavated material associated with excavation for Gravel Pads on the outer side of retaining wall for further stabilization of wall as shown in the construction drawings.

3.2 GRAVEL PAD

A. Gravel pad shall be 4 feet wide. Length & Depth of pads vary depending on respective shelter. Refer to construction drawings.

B. Contractor shall be responsible to ensure top of gravel pad is level with the existing Ramada Shelter concrete slab.

PART 4 – MEASUREMENT & PAYMENT

4.1 MEASUREMENT & PAYMENT

A. Payment for the timbers shall be per unit to include associated #3 Rebar and Lag Bolts. (EA).

B. Payment for gravel shall be per cubic yard (CY).

END OF SECTION 02100

SECTION 02101 ROAD/CAMPSITE RESURFACING

PART 1 - GENERAL

1.1 SUMMARY

A. Campground loop and campsite driving/parking surface improvements will include the blading and shaping of the existing campground loop road and campsites in preparation for placement of base coarse and a new gravel driving/parking surface. Additionally, a pull through drive shall be constructed according to the same specifications outlined in this section for a water fill station. This section also includes the construction of concrete valley gutters and drainage berms.

1.2 MEASUREMENT

A. Linear measurements for roadwork will be horizontal along the road centerline.

B. Linear measurements for campsite work will be horizontal along the campsite centerline.

C. Quantity for blading and shaping of road and campsites will be linear along the centerline respectively.

D. Quantity for placement of compacted base coarse for driving/parking surfaces & drainage berms will be per cubic yard.

E. Quantity for placement of gravel for driving/parking surfaces & drainage berms will be per cubic yard.

F. Quantity for construction of concrete valley gutters will be per cubic yard.

G. The actual quantities will be paid for at the contract unit price for each pay item shown in the Schedule of items. Actual quantities are defined as the actual physical quantity of material needed to accomplish the work outlined in this section to deliver a product that is both safe and acceptable. If construction requires a higher quantity of material than what has been shown in the Schedule of items, contractor shall coordinate with the CO for approval prior to construction and/or purchasing and billing.

PART 2 – PRODUCTS

CONTRACTOR SHALL PROVIDE SUBMITALLS INCLUDING BUT NOT LIMITED TO SOIL PROCTORS, MATERIAL GRADATION SHEETS, COMPACTION CURVES ETC.

2.1 BASE COURSE

A. Base course shall have a minimum dry unit weight of 138 pounds per cubic foot (lb/ft^3) +/- 10%. Contractor shall provide a soil proctor for base course from product supplier.

02102 - 2

CLEARING & GRUBBING

2.2 GRAVEL (Campsite Living Units & Electric Pedestals)

A. Gravel shall be 1/2" minus fractured gravel (unwashed). Contractor shall provide supplier specification for gravel to ensure proper size and type.

2.3 GRAVEL (Roadway, Drainage Berms & Campsites)

A. Gravel shall be 1” - 2” unwashed-crushed gravel. Contractor shall provide supplier specifications for gravel to ensure proper size and type.

2.4 VALLEY GUTTER

A. Concrete valley gutter shall be constructed with Quikrete High Strength Concrete Mix. Concrete shall be mixed per manufacturer recommendations.

PART 3 – EXECUTION

3.1 TYPICAL ROAD & CAMPSITE SOIL PROFILE (UNLESS OTHERWISE NOTED)

A. Typical road section shall be comprised of:

1. Finish Surface: 2” layer of compacted 1” – 2” unwashed gravel

2. Road Base: 3” Layer of compacted base coarse

3. Subgrade: Compacted Native Material

3.2 TYPICAL CAMPSITE LIVING UNIT & ELECTRIC PEDESTAL SOIL PROFILE (UNLESS OTHERISE NOTED) A. Typical campsite & campsite living unit section shall be comprised of:

1. Finish Surface: 2” layer of compacted 1/2" minus unwashed gravel

2. Base: 3” Layer of compacted base coarse

3. Subgrade: Compacted Native Material

3.3 BLADING AND SHAPING

A. Contractor shall blade & shape the existing Campground Loop Road and Campsites in preparation for resurfacing. Finished elevation of road shall be level with the high side of existing terrain. Low side road edge shall be built up with native material to ensure road surface material holds in place. Blading shall ensure that subgrade is compacted and level in anticipation of placing 5” of material on top of subgrade per section 3.1& 3.2 (for campsites).

3.4 COMPACTION METHODS AND COMPACTION EFFORT

A. For bidding purposes, the following will be the desired method for compaction as it pertains to the campground road loop and campsites.

1. Adjust the moisture content of the material to a moisture content suitable for compaction. Fill the interstices around rock with earth or other fine material as practical. Operate roller compaction equipment over the full width of each layer until there is no visible evidence of further consolidation or, if when a sheepsfoot roller is used, the roller “walks out” of the layer. Make at least three complete passes. Use compression-type rollers at speeds less than 6 feet (1.8 meters) per second and vibratory rollers at speeds less than 3 feet (1 meter) per second. Ensure rollers meet the following requirements:

(1) Steel wheeled rollers, other than vibratory, capable of exerting a force of not less than 250 pounds per inch (4.5 kilogram/millimeter) of width of the compression roll or rolls.

(2) Vibratory steel wheeled rollers equipped with amplitude and frequency controls with a minimum dynamic force of 30,000 pounds (130 kilonewtons) impact per vibration, specifically designed to compact the material on which it is used.

(3) Pneumatic-tired rollers with smooth tread tires of equal size that will provide a uniform compacting pressure for the full width of the roller and capable of exerting a ground pressure of at least 80 psi (550 Kilopascals).

(4) Sheepsfoot, tamping, or grid rollers capable of exerting a force of 250 pounds per inch (4.5 kilogram/millimeter) of width of roller drum.

NOTE: Contractor is not obligated to the preferred compaction method so long as compaction specifications are met for a particular task.

B. Compaction effort shall be defined as the effort required to obtain a level of compaction specified for a particular task. For example if it takes three full passes over a 20 foot section with a roller to achieve the specified compaction for base coarse on the road, then that effort will be noted and shall be put forth throughout the entire length of the road.

3.5 SUBGRADE COMPACTION

A. Campground Loop Road: Contractor shall obtain one (1) soil proctor on the subgrade at a location designated by COR. This proctor shall be representative of the subgrade for the entire loop road as well as the campsites. Upon blading and shaping the road the subgrade shall be compacted to 95% of the subgrade’s maximum compaction level per the proctor results. Contractor shall perform one (1) compaction test on the subgrade at a location designated by COR. This test shall be representative of the entire CG loop road and each campsite (subgrade only). The compaction effort required to achieve the specified level of compaction will be noted by the COR and shall be carried out by the contractor for the entire length of the CG loop road and at every campsite.

3.6 BASE COARSE

A. Contractor shall place one (1) 3” layer of base coarse on top of compacted subgrade. Base coarse shall be compacted to a minimum of 95% of the dry unit weight. In special situations where sections shall be built up in exceedance of the typical road section, contractor shall compact in 6” lifts to 95% of the dry unit weight. Refer to section 3.7 Campsites 4 & 7 for locations that this condition exists and additional details.

B. Contractor shall perform one (1) compaction test on the base coarse along the centerline of the Campground loop road at a location designated by COR. This test will be representative of the entire loop to include the base coarse placed at individual campsites with the exception of campsite 4, refer to section 3.7.B. The compaction effort required to achieve the specified level of compaction will be noted by the COR and shall be carried out by the contractor for the entire length of the CG loop road and at every campsite.

C. Contractor shall be responsible for providing water to ensure an adequate soil water content level is maintained for compaction.

3.7 CAMPSITES 4 & 7

A. For both campsites #4 & #7, to ensure the minimum dimensions of both length and width are met for camp spurs, contractor will be required to build up a base coarse pad with a depth in exceedance of the typical 3” lift specified for both the CG loop road and campsites.

B. Campsite #4: This site shall be a double camp spur per the drawings (detail 4 sheet X-17). The campsite shall be 40 linear feet long with a width of 20 linear feet over the entire length. For bidding purposes, the built-up pad shall have the following dimensions: 15ft x 20ft x 3ft deep yielding an estimated quantity of 33 Cubic Yards of base coarse. Note that the far edges of the built-up section shall taper down to the existing grade. Taper shall be no less than a 3:1 slope. Base coarse shall be compacted in 6-inch lifts until final grade is met. For this campsite, compaction method will be of choice as practical. Contractor shall perform one (1) compaction test on the first lift to achieve the specified compaction level for base coarse, at which point compaction effort shall continue for the remaining lifts.

C. Campsite #7: This site shall be a single camp spur per the drawings (detail 2 sheet X-17). The campsite shall be 40 linear feet long with a width of 10 linear feet over the entire length. For bidding purposes, the built-up section shall have the following dimensions: 15ft x 20ft x 1ft deep yielding an estimated quantity of 11 Cubic Yards of base coarse. NOTE the extra 5 feet of base coarse for this site is to account for additional material that may be required to bring the entire site up to a suitable grade for campsite living unit installation. Compaction effort shall match that of campsite #4.

3.8 GRAVEL SURFACE (ROADWAY, DRAINAGE BERMS & CAMPSITES)

A. Contractor shall place one (1) evenly distributed 2” layer of 1-2” unwashed gravel as a finish surface on top of base coarse layer.

3.9 GRAVEL SURFACE (CAMPSITE LIVING UNITS)

A. Contractor shall place one (1) evenly distributed 2” layer of 1/2" minus unwashed gravel as a finish surface on top of base coarse layer.

B. Gravel shall be compacted to 95% of its maximum compaction as noted by supplier or as approved of by COR.

3.10 WATER FILL STATION PULL THROUGH

A. Contractor shall construct a camp spur pull through. Minimum outside radius = 80 FT, minimum inside radius = 80 FT. Spur Width shall be = 16 FT minimum.

B. Fill station shall be considered a campsite and therefore have the same soil profile specified for campsites.

3.11 BAR DITCH

A. Contractor shall construct a bar ditch as depicted by flow lines in the construction drawings.

3.12 DRAINAGE BERMS

A. Contractor shall construct two (2) berms North of the existing Group Shelter. The berm shall consist of a ditch with a 2% downward slope in the direction depicted by flow lines in the construction drawings. Refer to berm details in the construction drawings for the typical berm detail.

3.13 VALLEY GUTTERS

A. Contractor shall construct three (3) 4-foot wide valley gutters. Total length may vary based on actual road width at the 3 locations. Refer to construction drawings for locations.

B. Contractor shall construct “lead-outs” after each valley gutter to channel runoff water from the valley gutters to the nearest vegetation cluster(s).

PART 4 – MEASUREMENT & PAYMENT

4.1 MEASUREMENT & PAYMENT

A. Payment for blading and shaping shall be per linear foot (LF).

B. Payment for ALL base coarse shall be per cubic yard (CY).

C. Payment for ALL gravel shall be per cubic yard (CY).

D. Payment for concrete valley gutter shall be per cubic yard (CY).

END OF SECTION 02102

SECTION 02316

EXCAVATION, TRENCHING, AND BACKFILLING FOR UTILITIES SYSTEMS

PART 1 - GENERAL

1.1 SUMMARY

A. Includes excavating, trenching, backfilling and compacting for the installation of utility lines to the depths and dimensions shown on the drawings.

1.2 RELATED SECTIONS

A. Section 16400: Underground Control Cable & Power Distribution

1.3 PROTECTION

A. Maintain the excavations to guard against and prevent injury to employees and the public. Provide adequate shoring and bracing as required.

B. Protect the excavation from frost action. Compact ground that has frozen and subsequently thawed as specified herein.

C. Prevent water accumulation in excavations. If clay soil becomes saturated, compact after it has dried as specified herein.

D. Minimum depth of soil cover for utility lines (measured from the top of the pipe, conduit, or cable to final construction ground elevation required):

NOTE: Minimum and maximum trench dimensions are shown in construction drawings, however for bidding purposes only Contractor shall estimate all trench widths at 2’-00” and trench depths at 4’-00” E. Protect existing underground utilities from damage.

1.4 DEGREE OF COMPACTION

A. Degree of compaction shall be expressed as a percentage of the maximum density obtained by the test procedure presented in ASTM D 1557

1.5 SUBMITTALS

A. The following shall be submitted in accordance with Section “Submittals.”

1. Reports.

a. Soil Proctors

b. Field Density Tests. Testing of Backfill Materials

c. Copies of all laboratory and field test reports within 24 hours of the completion of the test.

1.6 DEFINITIONS

A. Backfill: Soil materials used to fill an excavation.

B. Bedding Course: Layer placed over the excavated subgrade in a trench before laying pipe.

C. Borrow: Satisfactory soil imported from off-site for use as fill or backfill.

D. Drainage Course: Layer supporting slab-on-grade used to minimize capillary flow of pore water.

E. Excavation: Removal of material encountered above subgrade elevations.

1. Additional Excavation: Excavation below subgrade elevations as directed by Contracting Officer (CO). Additional excavation and replacement material will be paid for according to Contract provisions for changes in the Work.

2. Unauthorized Excavation: Excavation below subgrade elevations or beyond indicated dimensions without direction by CO. Unauthorized excavation, as well as remedial work directed by CO, shall be without additional compensation.

F. Fill: Soil materials used to raise existing grades.

G. Subgrade: Surface or elevation remaining after completing excavation, or top surface of a fill or backfill immediately below subbase, drainage fill, or topsoil materials.

H. Utilities include on-site underground pipes, conduits, ducts, and cables, as well as underground services within buildings.

PART 2 – PRODUCTS

2.1 MATERIALS

A. Satisfactory Soils: ASTM D 2487 Soil Classification Groups [GW, GP, GM, SW, SP, and SM], or a combination of these group symbols; free of rock or gravel larger than 2 inches in any dimension, debris, waste, frozen materials, vegetation, and other deleterious matter. Contents suitable for the intended use.

B. Unsatisfactory soils: ASTM D 2487 Soil Classification Groups [GC, SC, ML, MH, CL, CH, OL, OH, AND PT] or a combination of these group symbols. Unsatisfactory materials also include manmade fills, trash, refuse, or backfills from previous construction. Unsatisfactory material also includes material classification as satisfactory, which contains root and other organic matter, frozen material, and stones larger then 3 inches. The (CO) shall be notified of any contaminated materials.

C. Cohesionless and Cohesive materials: Cohesionless materials shall include materials classified in ASTM D 2487 as GW, GP, SW, AND SP. Cohesive materials shall include materials classified as GC, SC, ML, CL, MH, and CH. Materials classified as GM and SM shall be identified as cohesionless only when the fines are nonplastic.

D. Rock (NOT APPLICABLE).

E. Unyielding Material: Unyielding material shall consisting of gravelly soils with stones greater than 3 inches in any dimension or as defined by the pipe; manufacturer, whichever is smaller.

F. Unstable material: Unstable material shall consist of materials too wet to properly support the utility pipe, conduit, or appurtenant structure.

G. Backfill and Fill: Satisfactory soil materials.

H. Subbase: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; with at least 90 percent passing a 1-1/2 inch (38 mm) sieve and not more than 12 percent passing a No. 200 (0.75 mm) sieve.

I. Base: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; with at least 95 percent passing a 1-1/2 inch (38 mm) sieve and not more than 8 percent passing a No. 200 (0.75 mm) sieve.

J. Bedding: Naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 2940; with at least 100 percent passing a 1 inch (25 mm) sieve and not more than 8 percent passing a No. 200 (0.75 mm) sieve.

K. Drainage Fill: Washed, narrowly graded mixture of crushed stone, or crushed or uncrushed gravel; ASTM D 448; course-aggregate grading Size 57; with 100 percent passing a 1-1/2 inch (38 mm) sieve and 0 to 5 percent passing a No. 8 (2.36 mm) sieve.

L. Detectable Warning Tape: Polyethylene film warning tape encasing a metallic core, minimum 6 inches (150 mm) wide and 4 mils (0.1 mm) thick, continuously inscribed with a description of the utility.

1. Color: Comply with ASME A 13.1, unless otherwise indicated.

PART 3 – EXECUTION

3.1 EXCAVATION

A. Excavation shall be performed to the lines and grades indicated. Excavations shall be unclassified. During excavation, material satisfactory for backfilling shall be stockpiled in an orderly manner at a distance from the banks of the trench equal to ½ the depth of the excavation, but in no instance closer than 2 feet. Excavated material not required or not satisfactory for backfill shall be disposed of off site. The Contractor shall be responsible for disposal of materials. Grading shall be done as may be necessary to prevent surface water from flowing into the excavation, and any water accumulating shall be removed to maintain the stability of the bottom and sides of the excavation. Unauthorized over excavation shall be backfilled in accordance with paragraph BACKFILLING AND COMPACTION at no additional cost to the Government. NOT APPLICABLE SEE NOTE “a” BELOW:

a. Due to the remote location of this project, the contractor will not be held responsible for disposing of any material deemed non-suitable for backfill. However, bedding & backfill over any utilities shall be free of debri and aggregate/rock larger than 3” in diameter. Depth for placement of said material shall be: 18 inches minus outer pipe diameter immediately above utility for both Water and Electric Utilties. Any excess excavated materials shall be spread out on site at a location deemed appropriate per COR.

B. Trench Excavation requirements: The trench shall be excavated as recommended by the manufacturer of the pipe to be installed. Trench walls below the top of the pipe shall be sloped, or made vertical, and of such width as recommended in the manufacturer’s installation manual. Where no manufacturer’s installation manual is available, trench walls shall be made vertical, Trench walls more than 5 feet high shall be shored, cut back to a stable slope, or provided with equivalent means of protection for employees who may be exposed to moving ground or cave in or as recommended in OSHA Standards 29 CFR. Trench walls, which are cut back, shall be excavated to at least the angle of repose of the soil. Special attention shall be given to slopes, which may be adversely affected by weather or moisture content. The trench width blow the top of pipe shall not exceed 24 inches plus pipe outside diameter (O.D.) for pipes of less than 24 inches inside diameter and shall not exceed 36 inches plus pipe outside diameter for sizes larger than 24 inches inside diameter. Where recommended trench widths are exceeded, redesign, stronger pipe, or special installation procedures shall be utilized by the Contractor. The cost of redesign, stronger pipe, or special installation procedures shall be borne by the Contractor without any additional cost to the Government.

1. Bottom Preparation: The bottom of trenches shall be accurately graded to provide uniform bearing and supported for the bottom quadrant of each section of the pipe. Bell holes shall be excavated to the necessary size at each joint or coupling to eliminate point bearing. Stones of 3 inches or greater in any dimension, or as recommended by the pipe manufacturer, whichever is smaller, shall be removed to avoid point bearing.

2. Removal of Unyielding Material: Where unyielding material is encountered in the bottom of the trench, such material shall be removed 4 inches below the required grade and replaced with suitable materials as provided in paragraph BACKFILLING and COMPACTION.

3. Removal of Unstable Material: Where unstable material is encountered in the bottom of the trench, such material shall be removed to the depth directed and replaced to the proper grade with base material as provided in paragraph BACKFILLING AND COMPACTION. When removal of unstable material is required due to the Contractor’s fault or neglect in performing the work, the resulting material shall be excavated and replaced by the Contractor without additional cost to the Government.

4. Excavation for Appurtenances: Excavation for manholes, catch basins, inlets, or similar structures shall be of sufficient size to permit the placement and removal of forms for the full length and width of structure footings and foundations as shown. Removal of unstable material shall be as specified above. When concrete or masonry is to be placed in an excavated area, special care shall be taken not to disturb the bottom of the excavation. Excavation to the final grade level shall not be made until just before the concrete or masonry is to be placed.

5. Jacking, Boring, and Tunneling: Unless otherwise indicated, excavation shall be by open cut except that sections of a trench may be jacked, bored, or tunneled if, in the opinion of the Contracting Officer, the pipe, cable, or duct can be safely and properly installed and backfill can be properly compacted in such sections.

C. Stockpiles: Stockpiles of satisfactory materials shall be placed and graded as specified. Stockpiles shall be kept in a neat and well-drained condition, giving due consideration to drainage at all times. The ground surface at stockpile locations shall be cleared, grubbed, and sealed by rubber-tired equipment, excavated satisfactory and unsatisfactory materials shall be separately stockpiled. Stockpiles of satisfactory materials shall be protected from contamination, which may destroy the quality and fitness of the stockpiled material. If the Contractor fails to protect the stockpiles, and any material becomes unsatisfactory, such material shall be removed and replaced with satisfactory material from approved borrow sources at no additional cost to the Government. Locations of stockpiles of satisfactory materials shall be subject to prior approval of the Contracting Officer. The Contractor shall be responsible for obtaining approved borrows materials from sources off site, as required.

D. Over excavation of Clay Layers: No clay is anticipated to be encountered during trenching and excavation on this project. COR will be present throughout the project, if clay is encountered and its removal is deemed critical for contract work, contractor shall remove and replace with suitable backfill material per COR guidance. This situation would be treated as an unforeseen condition and quantified appropriately so that it can be mitigated.

E. Boulders or Plate Rock: The Forest Service does not anticipate this boulders or plate rock (Rock not in clusters that are under 6” in diameter). If this condition is encountered and its removal is deemed critical for contract work, contractor shall remove and replace with suitable backfill material per COR guidance. This situation would be treated as an unforeseen condition and quantified appropriately so that it can be mitigated

3.2 BACKFILL AND COMPACTION

A. Backfill material shall consist of satisfactory material, or base material as required.

1. Sastifactory Material – Material not containing rock (> 3” in diameter) or debri

2. Base Material – Base coarse with pertinent soil proctor from distributor/supplier

NOTE: Native material shall be permitted for pipe bedding, backfill and fill so long as it meets the definition for “sastifactory material” above. No soil analysis and/or compaction testing shall be required for native material.

Compact native material to a firm and stable surface per COR guidance.

Backfill shall be placed in layers not exceeding 6 inches (loose thickness for compaction by hand operated machine compactors), and 8 inches (loose thickness for other than hand operated machines), unless otherwise specified. For imported/trucked in material, each layer shall be compacted to at least 95 percent maximum density for cohesionless soils and 90 percent maximum density for cohesive soils, unless otherwise specified.

Contractor shall provide soil proctors for all imported/trucked in material.

B. Trench Backfill: Trenches shall be backfilled to the natural surrounding grade and giving a 3” mound on top. Contractor shall make all efforts to pressure test prior to any backfilling; however, the trench shall be permitted to be backfilled to 18 inches (plus pipe OD) above the top of pipe prior to performing the required pressure tests if permitted by COR The joints and couplings shall be left uncovered during the pressure test. The trench shall not be completely backfilled until all specified tests are performed. All open trenches shall be backfilled within 24 hours.

1. Replacement of Unyielding Material: Unyielding material removed from the bottom of the trench shall be replaced with base or backfill material.

2. Replacement of Unstable Material: Unstable material removed from the bottom of the trench or excavation shall be replaced with base material in layers not exceeding 6 inches loose thickness.

3. Bedding Backfill: Bedding for utilities shall be of the type “Satisfactory Material” as defined and a minimum thickness of 3”. Refer to Section 02510 Water Distribution, Subsection 4.5 Laying Pipe.

4. Backfill material immediately surrounding the utility/pipe shall be of the type” Satisfactory Material” as defined and shall extend up 18” plus pipe outer diameter of the pipe (from bottom of pipe). Said material shall be placed and compacted with approved tampers to a height of at least one foot above the utility pipe or conduit. The backfill shall be brought up evenly on both sides of the pipe for the fill length of the pipe. Care shall be taken to ensure through compaction of the fill under the haunches of the pipe.

5. Final Backfill: The remainder of the trench shall be filled with satisfactory material. Backfill material shall be placed and compacted as follows:

6. Turfed or Seeded areas and Miscellaneous areas: Backfill shall be deposited in layers of a maximum of 12 inch loose thickness, and compacted to 85 percent maximum density for cohesive soils and 90 percent maximum density for cohesionless soils. This requirement shall also apply to all other areas not specifically designated above.

C. Backfill for Appurtenances: After the manhole, catch basin, inlet, or similar structure has been constructed and the concrete has been allowed to cure for 3 days, backfill shall be placed in such a manner that the structure will not be damaged by the shock of falling earth. The backfill material shall be deposited and compacted as specified fore final backfill, and shall be brought up evenly on all sides of the structure to prevent eccentric loading and excessive stress.

3.3 SPECIAL REQUIREMENTS

Special requirements for both excavation and backfill relating to the specific utilities are as follows:

A. Water Lines: trenches shall be of a depth to provide a minimum cover of 48 inches from the existing ground surface, to the top of the pipe.

B. Electrical Distribution System:

1. Primary underground electric lines (NORA ELECTRIC): trenches shall be of a depth to provide a minimum cover of 48 inches from the existing ground surface, to the top of the conduit. NOTE: Forest Service will facilitate coordination of the placement of line to ensure the trench is not open longer than 24 hours. Contractor shall contact the Forest Service when he/she is ready to trench for the placement of NORA Electric’s new underground power distribution line.

2. Secondary underground electric lines: direct burial cable and conduit or duct line shall have a minimum cover of 24 inches from the finished grade, unless otherwise indicated. Bedding material shall be used for all direct burial cable.

C. Plastic Marking Tape: Warning tapes shall be installed directly above the utility. See construction drawings for trench details.

3.4 TESTING

Testing shall be the responsibility of the Contractor and shall be performed at no additional cost to the Government.

A. Imported Materials: For any/all material not native to the site, contractor shall provide soil proctors with compaction curves specifying maximum compaction levels and associated water content. All imported materials shall be compacted to 95% of the soil’s maximum compaction level. Note that the contractor will be responsible for performing one (1) test on the 3” compacted layer of base coarse for a utility trench at which point that compaction effort shall be matched for similar applications.

a. Example: If contractor trucks in base coarse and uses it for backfilling a trench over a waterline, contractor shall order a test to ensure that the material is properly compacted per soil proctor and note the compaction effort required. Presuming the same material is used to backfill an electric line, contractor will not be obligated to order another test. Contractor will be expected to use the same compaction effort for the electric line as for the waterline.

B. Test Facilities: an approved commercial testing laboratory shall perform Tests. Approval of testing facilities and personnel shall be based on compliance with ASTM D 3740.

C. Testing of Backfill Materials: Classification of backfill materials shall be determined in accordance with ASTM D 2487 and the moisture-density relations of soils shall be determined in accordance with ASTM D 1557.

D. Field Density Tests: Tests shall be performed in sufficient numbers to ensure that the specified density is being obtained. Contractor shall perform compaction tests as specified in applicable sections for particular work. Field in-place density shall be determined in accordance with ASTM D 1556, ASTM D 2167, or ASTM D 2922. When ASTM D 2922 is used, the calibration curves shall be checked and adjusted using the sand cone method (ASTM D 1556) as described in paragraph Calibration of the ASTM publication. ASTM D 2922 results in a wet unit weight of soil and when using this method, ASTM D 3017 shall be used to determine the moisture content of the soil. The calibration curves furnished with the moisture gauges shall be checked along with density calibration checks as described in ASTM D 3017. The calibration checks of both the density and moisture gauges shall be made at the beginning of a job, on each different type of material encountered, at intervals as directed by the Contracting Officer. Copies of calibration curves, results of calibration tests, and filed and laboratory density tests shall be furnished to the Contracting Officer. Trenches improperly compacted shall be reopened to the depth directed, then refilled and compacted to the density specified at no additional cost to the Government.

END OF SECTION 02316

SECTION 02510 WATER DISTRIBUTION

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes piping and appurtenances for potable-water service outside the buildings. This Section also includes flushing, testing, and disinfecting waterlines.

1.2 SUBMITTALS

A. Product Data for the following:

1. PVC Pipe and fittings

2. Compression couplings for similar and dissimilar pipes

3. Gate Valve and Box

4. Operating Tools For Curb Stop, Gate Valve & Meter Can Lids

5. Backflow preventers and assemblies.

B. Operation and Maintenance Manufacture Data: For the following:

1. Any/All Valves.

2. Backflow preventers.

3. Protective enclosures (valve boxes).

4. Hydrants.

1.3 QUALITY ASSURANCE

A. Regulatory Requirements:

1. Comply with requirements of utility company supplying water. Include tapping of water mains and backflow prevention.

2. Comply with standards of authorities having jurisdiction for potable-water- service piping, including materials, installation, testing, and disinfection.

B. Piping materials shall bear label, stamp, or other markings of specified testing agency.

C. EPA Compliance: Ensure lead free EPA requirements are met for hydrants and plumb- ing.

A. NSF Compliance:

1. Comply with NSF 14 for plastic potable-water-service piping.

2. Comply with NSF 61 for materials for water-service piping and specialties for domestic water.

2.2 SYSTEM PERFORMANCE REQUIREMENTS

02510 - 10

WATER DISTRIBUTION

A. Minimum Working Pressures: The following are minimum pressure requirements for piping and specialties, unless otherwise indicated:

1. Potable-Water Service: 160 psig.

2.3 PROJECT CONDITIONS

A. Existing Water Utilities: The existing water system at the Echo Amphitheater Campground, is a US Forest Service owned system (public drinking water system) monitored by the New Mexico Environment Department; Drinking Water Bureau (NMED; DWB). Contractor may utilize the water system for various applications in accordance with the following:

1. All usage must first and foremost be approved and directly supervised by COR to ensure reasonable usage.

2. If the contractor wishes to hook up to existing drinking water system, it will be the responsibility of the contractor to provide a well-documented backflow pre- vention plan, furnish and install vacuum breakers on the hydrants to mitigate cross connections and aid in preventing contamination of the drinking water sys- tem.

3. Do not interrupt utilities serving facilities occupied by Government or others un- less permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated: (IF APPLICABLE)

4. Notify Contracting Officer (CO) not less than two days in advance have pro- posed utility interruptions. (IF APPLICABLE)

5. Do not proceed with utility interruptions without CO's written permission.

NOTE: If it is discovered that the contractor is not complying with any/all of the regulations noted in section 2.3 Project Conditions (or NMED DWB regula- tions), contractor will be held responsible for immediate disinfection of the sys- tem, any/all sampling required to sufficiently prove adequate disinfection and acceptable water quality, and will be responsible for providing their own water (regardless of the use) from that point on. All this at NO ADDITIONAL COST TO THE FEDERAL GOVERNMENT.

2.4 DELIVERY, STORAGE, AND HANDLING

A. Deliver piping with factory-applied end-caps. Maintain end-caps through shipping, storage, and handling to prevent pipe-end damage and to prevent entrance of dirt, de- bris, and moisture.

B. Protect flanges, fittings, and specialties from moisture and dirt.

C. Store plastic piping protected from direct sunlight. Support to prevent sagging and bending.

2.5 COORDINATION

A. Coordinate connections to existing water mains with Forest Service Engineer/CO.

B. Coordinate piping materials, sizes, entry locations, and pressure requirements with building water distribution piping.

C. Coordinate with other utility work.

PART 2 - PRODUCTS

3.1 GENERAL

A. All waterlines, pipes, and fittings shall be new and unused, of the type, pressure rating or class, and size specified and as shown on the drawings.

3.2 PVC, SCHEDULE PIPE

A. PVC, Schedule 80 Pipe: ASTM D 1785.

1. PVC, Schedule 80 Glued Fittings: ASTM D 2467.

3.3 COUPLINGS FOR SIMILAR OR DISSIMILAR PIPE

A. Compression type transition fittings for making connections between like and dissimi- lar pipe materials shall be designed to enable a variety of connections between poly- ethylene pipe to various pipes. Fittings shall be Cepex performance series compres- sion fittings as manufactured by Cepex Holding, S.A. and distributed by The Lateral Connection Corp., Sparks, NV 89434 (775) 626-6777 or approved equal and supplied by Ferguson Waterworks, Denver, CO, (303) 571-4444 or approved equal.

3.4 PIPE SLEEVE

A. 4” PVC, Schedule 80 Pipe: ASTM D 1785.

1. PVC, Schedule 80 Socket Fittings: ASTM D 2467.

3.5 GATE VALVE

A. 1” Gate shall be:

a. Milwaukee Valve Gate Valve: 1" Pipe Size, 200 psi Max. Water Pressure – CWP Non-Rising Valve Stem; Or Approved Equal B. 1-1/2” Gate Valve shall be:

a. Milwaukee Valve Gate Valve: 1 1/2" Pipe Size, 200 psi Max. Water Pres- sure – CWP Lead-Free Brass; Or Approved Equal NOTE: All fitting required for connection shall be accounted for in items 02510.01 & 02510.02 respectively.

3.6 VALVE BOXES

A. Valve Boxes for this project will serve as housing for multiple drinking water system components and shall be:

a. Manufacturer: Bass & Hays Foundry, Inc.

1) Model No./Part: BH 536F 48” Depth x 36” Diameter

2) Associated Locking Lid: 5LID1

3) Or approved equal

3.7 UNDERGROUND DETECTION AND MARKING TAPE

A. Section 02316.

3.8 WATER METERS (NOT APPLICABLE IN THE CONTRACT)

A. Available Manufacturers:

1. Neptune Meters.

2. Badger Meter, Inc.

3. Or equal as approved by CO.

B. Description: AWWA C700, displacement-type, bronze main case. Register flow in gallons (liters) unless cubic feet (cubic meters) are indicated.

C. Description: AWWA C702, compound-type, bronze case. Register flow in gallons (liters) unless cubic feet (cubic meters) are indicated.

D. Water-Meter Boxes: Cast-iron body and cover for disc-type water meter with lettering "WATER METER" in cover; and slotted, open-bottom base section of length to fit over service piping.

3.9 BACKFLOW-PREVENTION DEVICES

A. Available Manufacturers:

1. Ames Co., Inc.

2. Cla-Val Co.

3. CMB Industries, Inc.; Febco Div.

4. Conbraco Industries, Inc.

5. FLOMATIC Corp.

6. Grinnell Corporation; Mueller Co.; Hersey Meters.

7. Watts Industries, Inc.; Water Products Div.

8. Zurn Industries, Inc.; Wilkins Div.

9. Or equal as approved by CO.

B. Check valves for use in 1” water lines shall be:

a. MILWAUKEE VALVE Low Lead Spring Check Valve: Single Flow In- line Spring, Bronze,1 in Pipe/Tube Size

b. Manufacturer Part No. UP548T 1

c. Or approved equal C. Check valves for use in 1-1/2” water lines shall be:

a. MILWAUKEE VALVE Low Lead Spring Check Valve: Single Flow, In- line Spring, Bronze, FNPT x FNPT, Bronze

b. Manufacturer Part No. UP548T 1-1/2

c. Or approved equal D. Check valves shall be installed with threaded unions on either side to ensure ease of removal for future operation and maintenance.

Shall contractor discover lines to be of a size not anticipated/noted in the draw- ings, contractor shall submit a new check valve to COR for approval prior to in- stallation. Only 1 check valve shall be installed at locations noted in drawings unless otherwise specified.

3.10 YARD HYDRANTS

A. All Drinking Water Hydrants shall be:

1. Murdock M-92 3/4" Hydrant with Paddle Handle; 3/4" Freeze Resistant, Com- pression-Type Post Hydrant complete with the “BFH” option (double ball check valve and vacuum breaker).

2. For bidding purposes depth to bury shall be estimated at 4 feet.

3. Any and all fittings needed to connect to either existing or new/supply line(s) shall be incidental to Line Items 02510.01 & 02510.02 respectively.

All dimensions after installation conform to the dimensions as SHOWN ON THE DRAWINGS. The hydrant provided meets all requirements of the Forest Service Outdoor Recreation Accessi- bility Guidelines (FSORAG) section 4.7. Submit hydrant section to COR before installation.

Accessibility standards: All dimensions after installation shall conform to the dimensions shown…