Drainage Mitigation for Linden Trails Addendum No. 1

SPECIAL PROVISIONS
TECHNICAL SPECIFICATIONS
FOR
NAVAJO COUNTY
LINDEN TRAILS SUBDIVISION
June 2026
Engineering & Environmental Design, LLC
4649 E. Cotton Gin Loop, Suite B2
Phoenix, AZ 85040
T. 602.438.2221

PROFESSIONAL ENGINEER SEALS:
This book of specifications and related contract documents represents the efforts of the
following firms:
(1) J2 Engineering and Environmental Design, LLC. (J2) (Civil Engineering)
A registrant of each firm has affixed his/her professional seal below, which attests that those
portions of these specifications, which relate to their respective discipline area, were
prepared under his/her direction.
J2 - Civil Engineering
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J2 Project No. 23.1642 Special Provisions

TABLE OF CONTENTS
SECTION 201 CLEARING AND GRUBBING 5
SECTION 215 EARTHWORK 5
SECTION 340 CONCRETE CURB AND DRIVEWAY 6
SECTION 505 CONCRETE STRUCTURES 7
SECTION 520 STEEL AND ALUMNIMUM HANDRAILS 9
SECTION 759 STEEL PIPE 9
SECTION 350 REMOVAL OF EXISTING IMPROVEMENTS 10
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J2 Project No. 23.1642 Special Provisions

LOCATION OF THE WORK
Improvements are located within the Linden Trails Subdivision, approximately 1 mile north of
State Route 260 on Lone Pine Dam Road in Linden, Navajo County, Arizona. The project is
situated approximately 5 miles west of Show Low, Arizona.
DESCRIPTION OF WORK
The project consists of drainage improvements within the Linden Trails Subdivision in Linden,
Arizona. The project will improve stormwater conveyance and drainage conditions through
construction of drainage channels, culverts, and associated grading improvements, with
evaluation of existing drainage patters and infrastructure.
SPECIAL CONDITIONS
MAG UNIFORM STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION and MAG
NAVAJO COUNTY SUPPLEMENTS TO DESIGN AND CONSTRUCTION STANDARDS AND
SPECIFICATIONS ARE HEREBY AMENDED TO INCLUDE THE FOLLOWING:
STANDARD SPECIFICATIONS
The below items of work along with the construction requirements are adequately described
and defined in the Maricopa Association of Governments (MAG) Uniform Standard
Specifications and Details for Public Works Construction, 2026 Revision to the 2025 Edition.
PERMITS:
Contractor is responsible for obtaining all necessary permits from appropriate governing
agencies and paying applicable fees prior to starting such construction activities. Governing
agencies could include Maricopa County, Navajo County, and Arizona Department of
Environmental Quality (ADEQ).
Samples of permits could include, but are not limited to:
a) dust control
b) storm water pollution control
c) traffic control
d) haul routes
e) notice of intent
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J2 Project No. 23.1642 Special Provisions

CONDITION OF MATERIALS:
All materials incorporated into the project are expected to be placed into service in new, clean
and unblemished condition. Any materials stored unprotected from their original
manufacture's packaging shall be cleaned of any foreign matter prior to use. All stored
materials shall be protected from surface scarring and dents. All materials found to deviate
from manufacture's original size, shape or condition may be subject to reorder at the discretion
of the Construction Manager.
SECTION 201 - CLEARING AND GRUBBING
201.1 DESCRIPTION:
This work shall consist of removing objectionable material from the right-of-way, easements
and such other areas as may be specified in the plans and special provisions. Clearing and
grubbing shall be performed in advance of grading operations. Clearing and Grubbing shall
conform to MAG Standard Specifications Section 201 and these special provisions.
201.2 PRESERVATION OF PROPERTY:
Existing improvements, adjacent property, utilities and other facilities, and trees and plants not
to be removed, shall be protected from injury or damage resulting from the Contractor's
operations.
201.4 REMOVAL AND DISPOSAL OF SALVAGEABLE ITEMS:
Items and materials of salvage value as determined by the Engineer, unless incorporated in
the new work, shall remain the property of the Contracting Agency and shall be stored in
adjacent areas as directed by the County. Such items and materials shall be carefully removed
and in such a manner as to permit reuse.
SECTION 215 - EARTHWORK
Earthwork shall conform to Section 215 of the MAG Uniform Standard Specifications except as
modified herein.
Subsection 215.1 - Description:
Replace this subsection with the following:
The work in this section consists of excavation, grading, and disposal of excavated and
removed materials as shown on the plans. Any excavated material not used for the Project is
to become the property of the County and removed from the site per the County's direction. It
is anticipated that a portion of the excavated material can be used as fill to meet the grades
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J2 Project No. 23.1642 Special Provisions

shown on the plans. The excavated material may require some reworking and /or blending to
meet the fill specifications including the removal of surface materials that do not meet the
requirements for re-establishment of the landscape and turf areas.
Subsection 215.3 - Excavation:
Add the following to this subsection:
The Contractor is encouraged to make a field visit. Existing ground conditions may be different
from that represented in the plans.
Contractor shall provide dust control as required to meet all local and federal requirements.
Finished channel surfaces shall be graded to drain.
Subsection 215.5 - Grading
Replace this subsection with the following:
Excavation and grading shall be performed so the finished surfaces are in uniform planes with
no abrupt breaks in the surface. All finished grades will be smoothed out with continuous
curves, per the direction of the Navajo County Representative.
ITEM 1 - EARTHWORK FOR CHANNEL EXCAVATION
Description:
Earthwork for Channel Excavation shall consist of clearing, stripping, excavation, fill, backfill,
grading, compaction, and disposal of excavated and removed material. Work under this item
shall also include the cost to haul off excess dirt and proper disposal.
Channels shall be graded for positive drainage. After channels have been constructed, the floor
of the channel shall be scarified 4" deep prior to placement of dg to reduce compaction and
increase percolation.
MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per lump sum cost.
Earthwork for Channel Excavation will be paid for at the contract unit price per lump sum cost.
Such price shall include, clearing, stripping, excavation, fill, backfill, compaction, grading,
hauling, removal and disposal of excess excavated material and debris unless alternative
method of payment is stipulated in the proposal.
SECTION 340 CONCRETE CURB AND DRIVEWAY
Construction of all concrete curbs and driveways shall be in accordance with MAG Standard
Specification 340, except as noted herein.
ITEM 10 - CONCRETE DRIVEWAY
The Contractor shall install Concrete Driveway complete including all equipment, labor, and
materials required for sub-grade preparation, construction of the concrete curbing or header,
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curb transitions and all incidental items necessary to accomplish the work in accordance with
the plans, details, and these Special Provisions.
MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per square foot.
ITEM 17 - SINGLE CURB, MAG 222 TYPE 'A'
The Contractor shall install Single Curb, MAG 222, Type 'A' complete including all equipment,
labor, and materials required for sub-grade preparation, construction of the concrete curbing
or header, curb transitions and all incidental items necessary to accomplish the work in
accordance with the plans, details, and these Special Provisions.
MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per linear foot.
SECTION 505 CONCRETE STRUCTURES
Construction of all concrete structures shall be in accordance with MAG Standard
Specification 505, except as noted herein.
ITEM 6 - CHANNEL (CONCRETE BOTTOM) (REINFORCED)
The Contractor shall install the reinforced concrete channel bottom complete including all
equipment, labor, and materials required for sub-grade preparation, sub-grade aggregate,
construction of the reinforced concrete channel and all incidental items necessary to
accomplish the work in accordance with the plans, details, and these Special Provisions.
MEASUREMENT:
Measurement for channel bottom with exposed aggregate finish shall be made on the basis
of the contract unit price bid per square foot.
ITEM 7 & 8 - CHANNEL (VERTICAL WALLS) (STACKED BLOCK)
The Contractor shall install the stacked block vertical walls complete including all
equipment, labor, and materials required for sub-grade preparation, construction of the
stacked block channel walls and all incidental items necessary to accomplish the work in
accordance with the plans, details, and these Special Provisions.
MEASUREMENT:
Measurement for channel walls shall be made on the basis of the contract unit price bid per
each.
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J2 Project No. 23.1642 Special Provisions

ITEM 7 ALT. - CHANNEL (VERTICAL WALLS) (CONCRETE) (REINFORCED)
The Contractor shall install the reinforced concrete channel consisting of vertical walls
complete including all equipment, labor, and materials required for sub-grade preparation,
construction of the reinforced concrete channel walls and all incidental items necessary to
accomplish the work in accordance with the plans, details, and these Special Provisions.
MEASUREMENT:
Measurement for channel walls shall be made on the basis of the contract unit price bid per
linear foot.
ITEM 9 - CHANNEL (SHOTCRETE)
The Contractor shall install the shotcrete channel complete including all equipment, labor,
and materials required for sub-grade preparation, sub-grade aggregate, construction of the
shotcrete channel and all incidental items necessary to accomplish the work in accordance
with the plans, details, and these Special Provisions.
MEASUREMENT:
Measurement for channel shall be made on the basis of the contract unit price bid per cubic
yard.
ITEM 13 - CONCRETE WALL, ADOT B-STANDARDS, B-18.10 WITH FOOTING
The Contractor shall install the Concrete Wall per MAG Standard Specification Section 505,
ADOT B-Standard details, and in accordance with the plans, details, and these Special
Provisions.
MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per each.
ITEM 14 - CONCRETE HEADWALL, ADOT B-STANDARDS, B-11.10 'SINGLE PIPE' TYPE
The Contractor shall install the Concrete Headwall per MAG Standard Specification Section
505, ADOT B-Standard details, and in accordance with the plans, details, and these Special
Provisions.
MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per each.
ITEM 15 - CONCRETE HEADWALL, ADOT B-STANDARDS, B-11.10 'L' TYPE
The Contractor shall install the Concrete Headwall per MAG Standard Specification Section
505, ADOT B-Standard details, and in accordance with the plans, details, and these Special
Provisions.
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MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per each.
ITEM 16 - CONCRETE HEADWALL, ADOT B-STANDARDS, B-11.10 'MULTI-PIPE' TYPE
The Contractor shall install the Concrete Headwall per MAG Standard Specification Section
505, ADOT B-Standard details, and in accordance with the plans, details, and these Special
Provisions.
MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per each.
SECTION 520 STEEL AND ALUMINUM HANDRAILS
Construction of all handrails shall be in accordance with MAG Standard Specification 520,
except as noted herein.
ITEM 18 - SAFETY RAIL, MAG 145, TYPE 1
The Contractor shall install the Safety Rail per MAG Standard Specification Section 520 and
in accordance with the plans, details, and these Special Provisions.
MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per linear foot.
SECTION 759 STEEL AND ALUMINUM HANDRAILS
Construction of all pipe shall be in accordance with MAG Standard Specification 759, except
as noted herein.
ITEM 11 - 24" DIAMETER CMP
The Contractor shall install the 24" Diameter CMP per MAG Standard Specification Section
759 and in accordance with the plans, details, and these Special Provisions.
MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per linear foot.
ITEM 12 - 36" DIAMETER CMP
The Contractor shall install the 36" Diameter CMP per MAG Standard Specification Section
759 and in accordance with the plans, details, and these Special Provisions.
MEASUREMENT:
Measurement shall be made on the basis of the contract unit price bid per linear foot.
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J2 Project No. 23.1642 Special Provisions

SECTION 350 - REMOVAL OF EXISTING IMPROVEMENTS
Removal of existing improvements shall conform to Section 350 of the MAG Uniform Standard
Specifications except as modified herein.
Subsection 350.1 - Description:
Add the following to this subsection:
The work includes the removal and disposal of existing items as indicated on the plans and per
submitted schedule of values for all listed removal within the project corridor.
Holes, cavities and trenches resulting from the removal of structures shall be backfilled in
accordance with Sections 206 and 211.
The Contractor shall dispose of all materials off-site at an approved landfill.
Salvage and replacement of specific removal items shall be as noted on plans.
ITEM 4 - SAWCUT AND REMOVE CONCRETE PAVEMENT
General: Comply with MAG Section 350 except as modified herein.
The disposal of all existing Concrete Pavement waste materials removed under this item shall
be the responsibility of the Contractor. The disposal site shall be approved by the City.
MEASUREMENT:
Measurement for removal shall be made on the basis of the contract unit price bid per square
yard.
ITEM 5 - REMOVE PIPES (LESS THAT 24" DIA)
The saw cutting and disposal of existing drainage pipe removed under this item shall be the
responsibility of the Contractor. The disposal site shall be approved by the City.
MEASUREMENT:
Measurement for removal shall be made on the basis of the contract unit price bid per linear
foot.
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