ROAD & BRIDGE SPECIFICATIONS

These specifications are also available in printed form at Mesa County - Engineering Division.

750 Main Street, Grand Junction, CO. The cost is $10.00. 

 

You are visitor number

TABLE OF CONTENTS 

ARTICLE I - General Provisions

1.1 Purpose 
1.2 Applicability 
1.3 Authority
1.4 Amendments
1.5 Meanings of “Shall”, “Should” and “May”

ARTICLE II - Administration

2.1 Road Systems 
2.2 Road System Regulations 
2.3 Road System Additions 
2.4 Deletions from the Road System 
2.5 Road Name Changes

ARTICLE III - Transportation Planning and Development Policies

3.1 Mesa County Land Development Code 
3.2 Land Development Proposals - Conformance 
3.3 Planning Principles for Local Circulation Systems 
3.4 Roadway Landscape Guidelines for Mesa County 
3.5 Explanation of Mesa County’s Policy on PUD Road Standards

ARTICLE IV - Design Standards

4.1 Application of Design Standards
4.2 Design Factors
4.3 Geometric Standards
4.4 Cross Section Standards
4.5 Access Requirement for Building Lots
4.6 Access Control Standards
4.7 Intersections at Grade
4.8 Pavement Structure Design
4.9 Drainage and Flood Control
4.10 Road Appurtenances
4.11 Utility Location and Coordination
4.12 Survey Monuments

ARTICLE V - CONSTRUCTION SPECIFICATIONS

 

5.1 General Policies 
5.2 Legal Responsibilities

ARTICLE VI - DEFINITIONS

6.1 Abbreviations of Official Names
6.2 Definitions

ARTICLE VII - TRAFFIC STUDIES AND RIGHT-OF-WAY ACQUISITION

7.1 Guidelines for Traffic Studies
7.2 Standard ROW Acquisition Procedure, Road and Bridge Projects

REFERENCED REPORTS

TABLES

Table 4-1 Minimum Curve Radius for Design Speed on Urban Residential Access Streets (without superelevation) 18
Table 4-2 Minimum Curve Radius for Design Speed on Collectors, Minor Arterials and Principal Arterials 18
Table 4-3 Maximum Superelevation Rates 18
Table 4-4 Side Friction Factors for Design Speed 18
Table 4-5 Design Controls for Vertical Curves at Centerline 20
Table 4-6 Right Turn Lane Warrants 32
Table 4-7 Left Turn Lane Warrants 33
Table 4-8 A-C Intersection Sight Distance 38
Table 4-9 Pavement Design Regional Factor 43
Table 4-10 Pavement Design Strength Coefficients 44
Table 4-11 Mannings N- Valve for Culverts 46
Table 4-12 Culvert Energy Loss Coefficients (entrance loss) 47
Table 4-13 Permissible Velocities for Roadside Drainage Ditches 49
Table 5-1 Minimum Requirements for Compaction of Embankments and Subgrades 60
Table 5-2 Required Quality Control Tests 61

FIGURES

FIGURE 4-1 Types of Horizontal Curves 15
FIGURE 4-2 Stopping Sight Distance on Horizontal Curves 16
FIGURE 4-3 Types of Vertical Curves 21
FIGURE 4-4 Stopping Sight Distance on Crest Vertical Curves 22
FIGURE 4-5 Speed Change Lanes 34
FIGURE 4-6 Sight Distance at Intersections 36
FIGURE 4-7 Design Nomograph - Flexible Pavements Serviceability Index = 2.0 41
FIGURE 4-8 Design Nomograph - Flexible Pavements Serviceability Index = 2.5 42

EXHIBITS

Exhibit A MPO / GIS Project Map 77
Exhibit B1 Urban Street Standards 78
Exhibit B2 Urban Street Standards 79
Exhibit C Rural Street Standards 80
Exhibit D Standard Utilities Locations and Multi-Purpose Easement Details 81
Exhibit E Cul-de-Sac Details 82
Exhibit F Standard Pavement Details 83
Exhibit G Accessible Ramp and Parking Stall Details 84
Exhibit H Standard Storm Drain Detail 85
Exhibit I Grand Valley Airshed 86