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Subdivision Regulations
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TABLE OF CONTENTS

SECTION 1
GENERAL PROVISIONS AND DEFINITION
PAGE
A.
Title
1-1
B.
Authority
1-1
C.
Jurisdiction
1-1
D.
Purpose
1-1
E.
Severability Clause
1-2
F.
Conditions
1-2
G.
Violations and Penalties
1-3
H.
General Terms
1-3
I.
Definitions
1-4
SECTION 2
GENERAL PROCEDURES
A.
Authorized Agent
2-1
B.
Permission to Enter
2-1
C.
Construction Timing and Installation of Infrastructure
2-1
D.
Transfers of Title
2-1
E.
Appeals
2-2
SECTION 3
REVIEW AND APPROVAL PROCEDURES FOR MAJOR SUBDIVISIONS AND SUBSEQUENT MINOR SUBDIVISIONS
A.
Major and Subsequent Minor Subdivisions
3-1
B.
Pre-Submittal Meeting
3-1
C.
Pre-Application Review
3-1
D.
Subdivision Preliminary Plat Application Submittal
3-2
E.
Review Process
3-2
F.
Subdivisions Within Planning Board Jurisdiction
3-4
G.
Subdivisions Outside Planning Board Jurisdiction
3-5
H.
County Commission Public Hearing
3-5
I.
County Commission Hearing - Subsequent Public Hearing
3-6
J.
Amended Subdivision Preliminary Plat Applications
3-6
K.
County Commission Decision and Documentation
3-7
L.
Subdivider Preference for Mitigation
3-10
M.
Subdivision Application and Preliminary Plat Approval
3-10
N.
Conditions of Approval Sheet
3-11
O.
Restrictive Covenants Approval, Content and Enforcement by the County Commission
3-11
P.
Amending Approved Preliminary Plats Before Final Plat Approval
3-13
Q.
Final Plat Required
3-14
R.
Resubmittal of a Denied Subdivision Preliminary Plat Application
3-15
SECTION 4
REVIEW AND APPROVAL PROCEDURES FOR FIRST MINOR SUBDIVISIONS
A.
First Minor Subdivision
4-1
B.
Pre-Submittal Meeting
4-1
C.
Pre-Application Plan Review
4-1
D.
First Minor Subdivision Preliminary Plat Application Submittal
4-2
E.
First Minor Subdivision Review Process
4-2
F.
First Minor Subdivision Exceptions
4-4
G.
Amended Subdivision Preliminary Plat Applications
4-4
H.
County Commission Public Hearing
4-5
I.
County Commission Subsequent Public Hearing
4-6
J.
County Commission Decision and Documentation
4-6
K.
Subdivider Preference for Mitigation
4-9
L.
Conditions of Approval Sheet
4-9
M.
Restrictive Covenants Approval, Content and Enforcement by the County Commission
4-10
N.
Subdivision Application and Preliminary Plat Approval
4-11
O.
Amending Approved Preliminary Plat Before Final Plat Approval
4-12
P.
Final Plat Required
4-13
Q.
Resubmittal of Denied Subdivision Preliminary Plat Application
4-14
SECTION 5
SUBDIVISION APPLICATION SUBMITTAL REQUIREMENTS
A.
Submittals
5-1
B.
Pre-Application Plan Submittal Requirements
5-1
C.
Submittal Requirements for all Subdivision Applicants for Preliminary Plat Review
5-4
D.
Submittal Requirements for All Subdivision Applications for Final Plat Review
5-9
SECTION 6
DESIGN AND IMPROVEMENT STANDARDS, GENERAL
A.
General Standards
6-1
B.
Lots
6-6
C.
Blocks
6-7
D.
Easements
6-8
E.
Fire Protection Requirements
6-10
F.
Grading and Drainage
6-12
G.
Park Requirements
6-12
H.
Trail Corridors
6-15
I.
Sanitary Sewers
6-15
J.
Sewage Treatment Systems
6-16
K.
Solid Waste
6-16
L.
Utilities
6-16
M.
Water Supply System
6-16
N.
Mail Delivery
6-17
O.
Noxious Weeds
6-17
P.
Waiver of Right to Protest
6-18
Q.
Stormwater Management
6-19
SECTION 7
TRANSPORTATION DESIGN AND IMPROVEMENT STANDARDS
A.
Intent
7-1
B.
General
7-1
C.
General Design
7-1
D.
Road Names
7-4
E.
Lot Access
7-4
F.
Access Road General Standards
7-4
G.
Access Road Improvement and Paving Standards
7-5
H.
Interior Subdivision Road Improvement Requirements
7-5
I.
Construction Standards for All Roads
7-6
J.
Pedestrian Facilities
7-12
K.
Trails Plan
7-12
L.
Transit
7-12
M
Subdivision within an Adopted Growth Policy of a City or Town
7-13
SECTION 8
IMPROVEMENTS PROCEDURES
A.
Improvements
8-1
B.
Improvements Procedures
8-1
C.
Acceptance of Improvements
8-4
SECTION 9
ENVIRONMENTAL ASSESSMENT
A.
General
9-1
B.
Environmental Assessment
9-1
C.
Environmental Description Contents
9-2
D.
Summary of the Probable Impacts Criteria
9-5
E.
Community Impact Report Contents
9-9
F.
Traffic Impact Study
9-14
SECTION 10
FLOOD HAZARD EVALUATION
A.
General
10-1
B.
Intent
10-1
C.
Procedure
10-1
D.
Flood Hazard Evaluation
10-2
E.
Flood Hazard Evaluation Techniques
10-4
F.
Waiver of Requirement
10-4
G.
Plat Map Requirements
10-5
SECTION 11
PLANNED UNIT DEVELOPMENT
A.
Intent
11-1
B.
Procedure and Submittal
11-1
C.
PUD Criteria
11-2
SECTION 12
SUBDIVISIONS THAT PROVIDE FOR THE RENT OR LEASE OF MULTIPLE SPACES FOR RECREATIONAL CAMPING VEHICLES OR MOBILE HOMES, AND CONDOMINIUMS
A.
General
12-1
B.
Procedure
12-1
C.
Plans and Data
12-1
D.
Standards for Mobile Home Parks and Recreational Vehicle Parks
12-2
E.
Standards for Condominiums
12-4
SECTION 13
ADMINISTRATIVE PROVISIONS
A.
Variances
13-1
B.
Subdivision Phasing
13-2
C.
Amendments to Subdivision Regulations
13-3
D.
Fees
13-3
E.
Corrections, Amendments, or Vacations of Recorded Final Plats
13-3
F.
Second or Subsequent Preliminary Plat Approvals; Withdrawing Preliminary Plat Approval
13-5
G.
Inaccurate or Incomplete Information
13-5
SECTION 14
DIVISIONS OF LAND EXEMPT FROM SUBDIVISION REVIEW
A.
Purpose
14-1
B.
Divisions of Land Exempt from the Requirements of These Subdivision Regulations and the MSPA
14-1
C.
Exemption for Certain Condominiums, Townhomes, or Townhouses
14-1
D.
Exemption for Airport Land, State-Owned Lands, and Conveyances Executed Before July 1, 1974
14-2
E.
Specific Exemptions from Review But Subject to Survey Requirements and Zoning Regulations
14-2
F.
Exemptions from Surveying and Platting Requirements for Lands Acquired for State Highways
14-3
G.
Exemptions as a Gift or Sale to a Member of the Immediate Family
14-3
H.
Relocation of Common Boundary Lines
14-4
I.
Relocation of Common Boundaries within a Platted Subdivision
14-5
J.
Aggregation of Parcels or Lots
14-5
K.
Security for Mortgage, Liens, or Trust Indenture for the Purpose of Construction, Improvements to the Land Being Divided, or Financing Purposes
14-6
L.
Procedues and Requirements
14-7

APPENDICES
APPENDIX A
Certificates
A-1
APPENDIX B
Supplementary Documents
B-1
APPENDIX C
Uniform Standards for Monumentation and Filing Requirements
C-1
APPENDIX D
Fire Protection Impact Fee Regulation
D-1
APPENDIX E
Road Impact Fee Regulation
E-1
APPENDIX F
Uniform Standards for Final Subdivision Plats
F-1
APPENDIX G
Flood Study
G-1
APPENDIX H
Amendments to the Regulations by Resolution
H-1
APPENDIX I
Fire Protection Packages
I-1
APPENDIX J
RESERVED
APPENDIX K
Commonly Required Conditions of Approval and Covenants
K-1

LIST OF FIGURES AND TABLES
FIGURE 1.
Subdivision Lot Terms
6-7
FIGURE 7.A.
Gallatin County Typical Road Standards
7-7
TABLE 7.1.
Road Design Standards
7-8
TABLE 7.2.
Gravel and/or Paving Width Standards
7-8
TABLE 7.3.
Sub-Base Gravel
7-9
TABLE 7.4.
Crushed Top Surfacing Type A
7-9
TABLE 7.5
Subdivision Access Road Intersection Spacing
7-11

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