The materials on this page provide guidance for ACHD’s consultants regarding design of ACHD capital projects. All materials are provided in a pdf format and select materials are also provided in Microsoft Word format for your convenience. The pdf versions will be considered the official direction to consultants.

ADA Compliance

Ensure work done in Ada County is in compliance with the American Disabilities Act (ADA).

• Project Development – ADA During Construction
• ADA During Construction, Three Separate Conditions

Special Provision on ADA During Construction:

• Less Than a Half Day's Work
• Contractor’s Responsibility
• Contract-Specific Traffic Control

Bid Item Averages

Historical bid estimations for project materials in Ada County.

• Bid Averages Report

CAD Standards

CAD Standards- CAD standards for Ada County Highway District projects.

• CAD Standards (Zip File)

Design Services

Information related to Design Services and procedures for the Ada County Highway District.

• Access Management on Capital Projects
• ACHD Bid Item List (Updated Nov 2025)
• Consultant Project Estimate Form (Updated Nov 2025)
• Design - Maintenance
• Environmental Review
• Irrigation District Access
• ISPWC Bid Item List
• ISPWC ACHD's Supplemental Specifications to the 2017 ISPWC Manual
• Planned vs. Measured Quantities
• SP & SSP Bid Item List (Updated Nov 2025)
• Special Provisions Request or Modification Form
• Standard Special Provisions (Updated 2024)
• Standard Special Provisions (Word)
• Survey & Design Criteria for Driveway

Mobility

Information related to Mobility requirements and procedures for ACHD

• Livable Streets Performance Measures
• Livable Streets Performance Measures - Design Guidelines
• ACHD’s Multi-Use Pathway Tool Kit
• Crash Data Resources

Right-of-Way

Information and requirements for ACHD right-of-way standards.

• ROW Requirements Checklist

Stormwater Quality

These documents present easy-to-implement guidelines for revegetation of side-slopes, banks, and bottoms (except sand invert areas) of new and existing stormwater management basins throughout the jurisdiction of ACHD.

• ACHD Specifications for Green Stormwater Infrastructure (GSI)
• ACHD Revegetation Guidance Manual
• EPA Construction General Permit Compliance
• Summary of Changes to Sections 8000 and 8200 (Effective 8-23-2017)
  • Current Standards Policy Manual Section 8000 Drainage & Stormwater Management
  • Current Standards Policy Manual Section 8200 Stormwater Design Manual
• USGS Mounding Report
• Former Standards Policy Manual Section 8000 (Prior to 08-23-2017)
• Former Standards Policy Design Manual Section 8200 (Prior to 08-23-2017)

Traffic Services

ACHD has adopted the three enclosed general special provisions for the installation, administration, measurement and payment of construction traffic control. These provisions should be used on all current and future projects.

• Construction Traffic Control Installation, Administration, Measurement and Payment
  • Special Provision on Traffic Control Administration
  • Special Provision on Traffic Control Installation
  • Special Provision on Traffic Control Measurement
• Traffic Standards

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