Specifications Document.doc

GRANDVIEW CAMPGROUND, LONG DRAW CAMPGROUND,

AND CHAMBERS LAKE CAMPGROUND

WATER SYSTEM MAINTENANCE

STANDARD SPECIFICATIONS

TABLE OF CONTENTS

Revision Date 12-14-2009

DIVISION 2 - SITE WORK

Section 02221 - Earthwork

Section 02519 - Aggregate Trails

DIVISION 3 – CONCRETE

Section 03300 - Cast-In-Place Concrete

DIVISION 15 – MECHANICAL

Section 15214 - Disinfection of Handpump and Appurtenances

Section 15232 - Water Well / Handpump Installation

SECTION 02221

EARTHWORK

PART 1 - GENERAL

1.01

SCOPE

A.

Includes excavation, general backfill, and compaction around improvements.

B.

Defines suitable, unsuitable, and excess excavation. Explains procedures for handling excess excavation and unsuitable excavation.

1.02

DEFINITIONS

Suitable Excavation: Excavated material suitable for use as backfill. Suitable excavation does not contain rock greater in size than that approved for the specific backfill purpose, frozen earth, clods, debris, or material with an exceptionally high void content (vegetative matter). The size of rock is dependent on the purpose and location of the backfill. Refer to the individual sections for backfill definitions.

Unsuitable Excavation: The opposite of suitable excavation. Excavated material not suitable for use as backfill.

C.

Excess Excavation: Surplus excavation that is not needed to complete construction. Excess excavation can be either suitable or unsuitable excavation.

1.03

PROTECTION

Protect excavations from accumulation of water. If clay soil becomes saturated, compact after it has dried as specified herein.

B.

Protect excavations from freezing. If frost action occurs, compact ground after thawing as specified herein.

PART 2 - PRODUCTS

2.01

BACKFILL AND FILLS

A. Use the excavated material as specified below.

1. Remove rocks over 6" in maximum dimension, ice or frozen earth, muck, debris, and earth with high void content.

2. Remove rocks over 4" in maximum dimension for backfill placed within 12" of foundation.

3. Materials removed in stripping shall not be used for backfill.

2.02

BEDDING AND BACKFILL MATERIAL

Initial backfill shall be select earth material taken from the excavation or other designated sources. Material shall not contain any frozen earth, clods, debris, or material with an exceptionally high void content (vegetative matter).

B.

Subsequent backfill shall be earth material free from large rock greater than 9” in its largest dimension, frozen earth, clods, debris, or material with an exceptionally high void content (vegetative matter).

2.03 IMPORTED MATERIAL

A.

General: All fill material shall be free of roots, sod, organic matter or deleterious material and rocks or lumps larger than 4 inches in greatest dimension, with a liquid limit less than 40 and a plasticity index less than 10. All fill material shall be approved by the Project Manager prior to its use. Material shall meet the soil characteristics of the surrounding site for color, texture, and composition.

B.

On-Site Material: In general, the on-site soils are suitable for use as fill.

C.

Broken concrete or asphaltic pavement shall not be used as fill material.

PART 3 - EXECUTION

3.01

EXCAVATION

Perform to the lines, grades, and elevations indicated. Extend excavation a sufficient distance from walls, and footings to allow for safety, placing and removal of forms, installation of services, compaction of backfill, and for inspection.

1.

Bottoms for footings, and foundation walls shall be level, clean, true to size, and to undisturbed or compacted soil, clear of loose materials.

3.02

BACKFILLING

Place and compact fills and backfills adjacent to structures in such a manner as to prevent wedging action or eccentric lodging upon or against the structures.

1.

Remove forms, and clean the excavation of trash and debris prior to backfilling.

2.

Do not place backfill against any concrete footings or structure without prior permission of the Project Manager and in no case less than 1 days after placement of concrete.

3.

Place backfill in horizontal layers not more than 12" thick with the proper moisture content for the required degree of compaction. Flooding or puddling not allowed. Compact each layer as specified.

4.

Provide for anticipated settlement and shrinkage of the backfill and for the finished grades required.

5.

Prepare subgrades for gravel fill areas level and free from soft spots. Place and compact earthfill where required to raise subgrade. Place gravel to the lines and grades shown. Compact the gravel sub-base as specified until a smooth, uniform use surface is obtained.

3.04

COMPACTION

Compact each layer with a hand compaction plate tamping equipment. Operate the compaction equipment over the full width of each layer until visible deformation of the layer ceases. Make at least three complete passes

TC " SECTION 02519 - AGGREGATE TRAILS " \l 2 SECTION 02519

AGGREGATE TRAILS

PART 1 - GENERAL

1.01

DESCRIPTION

A.

This item shall consist of clearing and slash disposal, excavation, furnishing and placing aggregate surface crusher fine material, and the construction of the trail bed in accordance with these specifications and as SHOWN ON THE DRAWINGS.

PART 2 - PRODUCTS

2.01

AGGREGATE

A.

Crusher fine aggregate material shall be tan limestone crusher fines (3/8” minus) by Pioneer sand, 6705 South College Ave., Fort Collins, CO, or approved equal. Gradation of aggregate shall be approved by the Engineer. The color of the aggregate shall be as natural tone as possible. The contractor shall submit samples of the aggregate for approval of color by the Engineer.

PART 3 - CONSTRUCTION

3.01

GENERAL

A.

The trail way cross section and finish shall be constructed as SHOWN ON THE DRAWINGS. Excess and unsuitable excavation shall be placed beyond the down slope edge of the trail bed, uniformly spread to a depth not exceeding 4 inches and placed so as not to obstruct drainage.

B.

Rocks not used in construction shall be placed beyond the trail bed edge on the down slope side. Placement and distribution shall be randomly scattered to ensure no blockage of drainage or creation of windrows.

C.

All embankment shall be constructed of compacted mineral soil. All disturbed soil within the trail bed area shall be recompacted.

D.

Finished slopes shall conform reasonably to the lines SHOWN ON THE DRAWINGS. The finished slope shall be left in a roughened condition to facilitate seeding.

E.

After installation is completed, the area around the sign shall be backfilled with excavated material to the established grade and compacted to the density of the surrounding natural ground. Area shall then be cleaned up by removing all debris and material not utilized.

I.

Seeding and mulching shall be in accordance with the requirements of Section 02933. There shall be no separate payment for seeding and mulching and work shall be considered incidental to construction.

PART 4 - MEASUREMENT

4.01

METHOD

The method of measurement, as described in Section 01025, will be DESIGNATED in the SCHEDULE OF ITEMS.

PART 5 - PAYMENT

5.01

BASIS

The accepted quantities will be paid for at the contract unit price for each pay item shown in the SCHEDULE OF ITEMS.

Payment will be made under:

Pay Item

Pay Unit

02519(01) Aggregate Trails …………… S.Y.

SECTION 03300

CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.01

SUMMARY

A.

This Section includes minor cast-in-place concrete, including reinforcement, concrete materials, mix design, placement procedures, and finishes.

1.02

SUBMITTALS

A.

Product Data: For each manufactured material and product indicated.

B.

Design Mix: For each concrete mix indicated.

1.

Concrete pad for Handpump.

C.

Certificate of Compliance: The Contractor shall submit to the Contracting Officer a certificate of compliance that states the concrete mix meets the requirements of this section at least 24 hours prior to placement.

D.

All exposed concrete shall have the following integrally colored pigment: Davis "Padre Brown", or an equal approved by the Contracting Officer.

1.03

QUALITY ASSURANCE

A.

Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products complying with ASTM C 94 requirements for production facilities and equipment.

B.

Comply with ACI 301, "Specification for Structural Concrete," including the following, unless modified by the requirements of the Contract Documents.

1.

General requirements, including submittals, quality assurance, acceptance of structure, and protection of in-place concrete.

2.

Formwork and form accessories.

3.

Steel reinforcement and supports.

4.

Concrete mixtures.

5.

Handling, placing, and constructing concrete.

6.

Lightweight concrete.

PART 2 - PRODUCTS

2.01

MATERIALS

A.

Formwork: Furnish formwork and form accessories according to ACI 301.

B.

Steel Reinforcement:

1.

Reinforcing Bars: ASTM A 615/A 615M, Grade 60 (Grade 420), deformed.

2.

Portland Cement: ASTM C 150, Type I or II or I/II, use one brand of cement throughout project.

3.

Normal-Weight Aggregate: ASTM C 33, uniformly graded, not exceeding 1-1/2-inch (38-mm) nominal size.

4.

Lightweight Aggregate: ASTM C 330.

5.

Water: Complying with ASTM C 94.

C.

Admixtures:

1.

Air-Entraining Admixture: ASTM C 260.

2.

Water-Reducing Admixture: ASTM C 494, Type A.

3.

High-Range, Water-Reducing Admixture: ASTM C 494, Type F.

4.

Water-Reducing and Accelerating Admixture: ASTM C 494, Type E.

5.

Water-Reducing and Retarding Admixture: ASTM C 494, Type D.

D.

Joint-Filler Strips: ASTM D 1751, asphalt-saturated cellulosic fiber.

E.

Curing Materials:

1.

Evaporation Retarder: Waterborne, monomolecular film forming, manufactured for application to fresh concrete.

2.

Absorptive Cover: AASHTO M 182, Class 2, burlap cloth made from jute or kenaf.

3.

Moisture-Retaining Cover: ASTM C 171, polyethylene film or white burlap-polyethylene sheet.

4.

Water: Potable.

F.

Colored Pigment: All exposed concrete shall have the following integrally colored pigment: Davis Color “Padre Brown”, or an approved equal.

2.02

CONCRETE MIXES

A.

Comply with ACI 301 requirements for concrete mixtures.

B.

Prepare design mixes, proportioned according to ACI 301, for normal-weight concrete determined by either laboratory trial mix or field test data bases, as follows:

1.

Compressive Strength (28 Days): 3000 psi (20.7 MPa).

2.

Slump: 4 inches (100 mm).

a.

Slump Limit for Concrete Containing High-Range Water-Reducing Admixture: Not more than 8 inches (200 mm) after adding admixture to plant- or site-verified, 2- to 3-inch (50- to 75-mm) slump.

C.

Add air-entraining admixture at manufacturer's prescribed rate to result in concrete at point of placement having an air content of 6.0 percent within a tolerance of plus 1.0 or minus 1.5 percent.

2.03

CONCRETE MIXING

A.

Ready-Mixed Concrete: Comply with ASTM C 94

1.

When air temperature is between 85 and 90 deg F (30 and 32 deg C), reduce mixing and delivery time from 1-1/2 hours to 75 minutes; when air temperature is above 90 deg F (32 deg C), reduce mixing and delivery time to 60 minutes.

B.

Project-Site Mixing: Measure, batch, and mix concrete materials and concrete according to ASTM C 94. Mix concrete materials in appropriate drum-type batch machine mixer.

1.

For mixer capacity of 1 cu. yd. (0.76 cu. m) or smaller, continue mixing at least 1-1/2 minutes, but not more than 5 minutes after ingredients are in mixer, before any part of batch is released.

2.

For mixer capacity larger than 1 cu. yd. (0.76 cu. m), increase mixing time by 15 seconds for each additional 1 cu. yd. (0.76 cu. m).

C.

Provide batch ticket for each batch discharged and used in the Work, indicating Project identification name and number, date, mix type, mix time, quantity, and amount of water added. Record approximate location of final deposit in structure.

PART 3 - EXECUTION

3.01

INSTALLATION, GENERAL

A.

Formwork: Design, construct, erect, shore, brace, and maintain formwork according to ACI 301.

B.

Steel Reinforcement: Comply with CRSI's "Manual of Standard Practice" for fabricating, placing, and supporting reinforcement.

C.

Joints: Construct joints true to line with faces perpendicular to surface plane of concrete.

1.

Construction Joints: Locate and install so as not to impair strength or appearance of concrete, at locations indicated or as approved by the Contracting Officer.

2.

Isolation Joints: Install joint-filler strips at junctions with slabs-on-grade and vertical surfaces, such as column pedestals, foundation walls, grade beams, and other locations, as indicated.

a.

Extend joint fillers full width and depth of joint, terminating flush with finished concrete surface, unless otherwise indicated.

3.

Contraction Joints in Slabs-on-Grade: Form weakened-plane contraction joints, sectioning concrete into areas as indicated. Construct contraction joints for a depth equal to at least one-fourth of the concrete thickness, as follows:

a.

Grooved Joints: Form contraction joints after initial floating by grooving and finishing each edge of joint with groover tool to a radius of 1/8 inch (3 mm). Repeat grooving of contraction joints after applying surface finishes. Eliminate groover marks on concrete surfaces.

D.

Tolerances: Comply with ACI 117, "Specifications for Tolerances for Concrete Construction and Materials."

3.02

CONCRETE PLACEMENT

A.

Comply with recommendations in ACI 304R for measuring, mixing, transporting, and placing concrete.

B.

Consolidate concrete with mechanical vibrating equipment.

C.

Cold Weather Placing:

1.

Protect concrete work from physical damage or reduced strength which could be caused by frost, freezing actions, or low temperatures, in compliance with ACI 306 and as herein specified.

2.

When air temperature has fallen to or is expected to fall below 40 F (4 C), uniformly heat water and aggregates before mixing to obtain a concrete mixture temperature of not less 50 (10 C), and not more than 80 F (27 C) at point of placement.

3.

Do not use frozen materials or materials containing ice or snow. Do not place concrete on frozen subgrade or subgrade containing frozen materials.

4.

Do not use calcium chloride, salt or other materials containing antifreeze agents or chemical accelerators, unless other wise accepted in mix designs.

D.

Hot Weather Placing:

1.

When hot weather conditions exist that would seriously impair quality and strength of concrete, place concrete in compliance with ACI 305 and as herein specified.

2.

Cool ingredients before mixing to maintain concrete temperature at time of placement below 90 F (32 C).

3.

Mixing water may be chilled, or chopped ice may be used to control temperature provided water equivalent of ice is calculated to total amount of mixing water.

3.03

FINISHING FORMED SURFACES

A.

Rough-Formed Finish: As-cast concrete texture imparted by form-facing material with tie holes and defective areas repaired and patched, and fins and other projections exceeding 1/4 inch (6 mm) in height rubbed down or chipped off.

1.

Apply to concrete surfaces not exposed to public view.

B.

Related Unformed Surfaces: At tops of walls, horizontal offsets, and similar unformed surfaces adjacent to formed surfaces, strike off smooth and finish with a texture matching adjacent formed surfaces. Continue final surface treatment of formed surfaces uniformly across adjacent unformed surfaces, unless otherwise indicated.

3.04

FINISHING UNFORMED SURFACES

A.

General: Comply with ACI 302.1R for screeding, restraightening, and finishing operations for concrete surfaces. Do not wet concrete surfaces.

B.

Screed surfaces with a straightedge and strike off. Begin initial floating using bull floats or darbies to form a uniform and open-textured surface plane before excess moisture or bleedwater appears on the surface.

1.

Do not further disturb surfaces before starting finishing operations.

C.

Trowel Finish: Apply a hard trowel finish to surfaces indicated and to floor and slab surfaces exposed to view or to be covered with resilient flooring, carpet, ceramic or quarry tile set over a cleavage membrane, paint, or another thin film-finish coating system.

3.05

CONCRETE PROTECTION AND CURING

A.

General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures. Comply with ACI 306.1 for cold-weather protection, and follow recommendations in ACI 305R for hot-weather protection during curing.

B.

Evaporation Retarder: Apply evaporation retarder to concrete surfaces if hot, dry, or windy conditions occur before and during finishing operations. Apply according to manufacturer's written instructions after placing, screeding, and bull floating or darbying concrete, but before float finishing.

C.

Begin curing after finishing concrete, but not before free water has disappeared from concrete surface.

D.

Cure formed and unformed concrete for at least seven days as follows:

1.

Moisture Curing: Keep surfaces continuously moist with absorptive cover, water saturated and kept continuously wet.

2.

Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover for curing concrete, placed in widest practicable width, with sides and ends lapped at least 12 inches (300 mm), and sealed by waterproof tape or adhesive. Immediately repair any holes or tears during curing period using cover material and waterproof tape.

END OF SECTION

TC " SECTION 15214 - DISINFECTION OF WATERLINES " \l 2 SECTION 15214

DISINFECTION OF HANDPUMP AND APPURTENANCES

PART 1 - GENERAL

1.01

DESCRIPTION

A.

This section includes disinfection methods for new potable water systems or existing systems extended, damaged, repaired, broken, or otherwise altered due to construction activities.

PART 2 - PRODUCTS

2.01

GENERAL

A.

Chlorine Compounds:

1. Gaseous Chlorine: This form of chlorine shall not be permitted.

2. Hypochlorite’s: Liquid or powder form.

3. Chloramines: Liquid form.

4. Chlorinated Dimethylhydantoin: Powder form.

5. Other liquid or powder chlorine compounds approved by the Engineer.

PART 3 - CONSTRUCTION

3.01

DISINFECTION

A.

Dosage: Disinfecting material shall be placed in the water system to provide approximately 100 mg/1 of total chlorine as follows:

CHLORINE COMPOUND REQUIRED TO DOSE 100 FEET OF WATER-FILLED WELL AT 100 mg/l

Chlorine Compounds

Note:

Liquid sodium hypochlorite in a 12 percent solution is often sold for water and wastewater treatment plant use, as commercial bleach, or for use with swimming pools. Utilizing a solution of this nature would call for a liquid measure equal to one-half the volumes presented under 5.25 percent Purex Clorox (liquid measure).

*Where a dry chemical is used, it should be mixed with water to form a chlorine solution prior to placing it into the system.

TC " SECTION 15232 - WATER WELL " \l 2 SECTION 15232

WATER WELL / HANDPUMP INSTALLATION

PART 1 - GENERAL

1.01

DESCRIPTION

A.

For the Grandview Campground and Long Draw Campground the work includes the removal and disposal of existing concrete well slab, the existing handpump, and the existing drop pipe and pump cylinder. Work shall also include the construction of new concrete well slab, and the extension of the existing well casing to 12” above the new concrete slab, and the installation of Baker/Monitor hand pump on existing well casings. Well logs are included in Exhibit A.

Work to include the installation of a new 6’-0” x 6’-0” x 6” concrete slab around the well casing/hand pump and construction of drainage swales around the new concrete slabs.

B. Construction of new concrete slab around the Chambers Lake Campground wellhead. Includes the temporary opening (and final closing) of the access road to the wellhead site, minor clearing along the access road, excavation to raise the subgrade around the wellhead, construction of new concrete wellhead slab, and the construction of drainage swales around the new concrete wellhead slab.

PART 2 - PRODUCTS

2.01

HAND PUMP

A.

The new hand pump shall be as manufactured by Baker Manufacturing Company or an approved equal. Local distributor is Pumps Inc., 303-421-6358. Handpump shall include, but not limited to the following:

1. Pump Stand with Siphon Spout and Shroud – Handpump shall come with factory installed sanitary shroud. Match handpump to accommodate existing well casing.

2. Sealed Flange – Size to accommodate existing well casings

3. Pump Rods – 7/16” x 18TC (threaded and coupled)

4. Screen kit for Siphon Spout

5. 1¼” Diameter PVC well drop pipe

6. All brass cylinder with strainer

B.

All other components will need to be supplied and installed by the Contractor.

2.02

WASHED ROCK

A. Washed rock shall be clean, washed rock between ¾” and 1” diameter.

PART 3 - CONSTRUCTION

3.01

EXISTING HAND PUMP STAND AND CONCRETE SLAB

A.

The existing hand pump and concrete pad surrounding the existing casing shall be removed prior to other items work. Material shall be removed to an approved sanitary landfill off National Forest lands.

3.02

CONCRETE

A.

Install as SHOWN ON THE DRAWINGS.

3.03

NEW HAND PUMP

A.

All work shall be performed in a thorough and workman like manner in accordance with the manufacturer’s recommendation and applicable state and local regulations. Pump installation shall be performed only by those contractors licensed to install pumps in the State of Colorado. Pump installer shall complete the necessary Pump Installer certification as required by the State of Colorado and submit two copies to the Contracting Officer.

3.04

DISINFECTION

A.

Disinfection of the well and all new hand pump components shall be performed in accordance with Section 15214.

3.05

ACCESS ROAD

A. Contractor shall be responsible for the temporary removal and setting aside of existing boulder rocks that currently block the Chambers Lakes wellhead access road. Contractor shall reset existing boulders once work has been completed. Work shall also include the minor clearing of down trees and brushing of small trees in the access road. Cleared debris shall be scattered outside the roadway template.

PART 4 - MEASUREMENT

4.01 METHOD

A.

The method of measurement will be DESIGNATED in the SCHEDULE OF ITEMS.

PART 5 - PAYMENT

5.01

BASIS

A.

The accepted quantities will be paid for at the contract unit price for each pay item shown in the SCHEDULE OF ITEMS.

Payment shall be made under:

Pay Item

Pay Unit

15232(01) Removal of Existing Hand pump and L.S.

Installation of New Hand Pump and Concrete Slab 15232(02) Construction of New Concrete Slab L.S.

For Wellhead Protection

EXHIBIT A

Grandview Campground Well Log

EXHIBIT A

Long Draw Campground Well Log

02221 - 4

EARTHWORK

TABLE OF CONTENTS - 1