Gallatin County, Montana
Subdivision Regulations
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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
1-3
G.
General Terms
1-3
H.
Definitions
1-4
GENERAL PROCEDURES
A.
Construction Timing and Installation of Infrastructure
2-1
B.
Transfers of Title
2-1
C.
Permission to Enter
2-2
D.
Appeals
2-2
REVIEW AND APPROVAL PROCEDURES FOR MAJOR SUBDIVISIONS
A.
General
3-1
B.
Pre-Submittal Meeting
3-1
C.
Pre-Application Review
3-1
D.
Concurrent Review
3-2
E.
Subdivision Application and Preliminary Plat Review
3-2
F.
Review Process
3-3
G.
Subdivisions Within Planning Board Jurisdiction
3-5
H.
Subdivisions Outside Planning Board Jurisdiction
3-6
I.
County Commission Hearing - General
3-6
J.
County Commission Hearing - Subsequent Public Hearing
3-7
K.
Amended Application – Preliminary Plat Review
3-8
L.
County Commission Decision and Documentation
3-10
M.
Subdivider’s Preference for Mitigation
3-18
N.
Subdivision Application and Preliminary Plat Approval Period
3-18
O.
Restrictive Covenants – Approval, Content and Enforcement buy the County Commission
3-19
P.
Amending Approved Preliminary Plats Before Final Plat Approval
3-21
Q.
Final Plat Required
3-22
R.
Review of Abstract and Covenants
3-22
S.
Final Plat Review
3-22
T.
Final Plat Approval
3-24
U.
Resubmittal of Denied Subdivision
3-24
V.
Final Plat Filing
3-24
W.
Amending Final Plats
3-25
REVIEW AND APPROVAL PROCEDURES FOR MINOR SUBDIVISIONS
A.
General
4-1
B.
Pre-Submittal Meeting
4-1
C.
Pre-Application Review
4-1
D.
First Minor Subdivision Application and Preliminary Plat Review
4-2
E.
Review Process
4-2
F.
First Minor Subdivision Exceptions
4-5
G.
Planning Board Consideration and Recommendation of First Minor Subdivisions
4-5
H.
Subdivider’s Preference for Mitigation
4-6
I.
Amended Applications - First Minor Subdivision Application
4-7
J.
County Commission Hearing - General
4-8
K.
County Commission Decision and Documentation of a First Minor Subdivision
4-8
L.
Documentation of County Commission Decision
4-15
M.
Restrictive Covenants – Approval, Content and Enforcement by the County Commission
4-16
N.
Subdivision Application and Preliminary Plat Approval Period
4-17
O.
Additional Conditions After Approval
4-18
P.
Amending Approved Preliminary Plats Before Final Plat Approval
4-18
Q.
Final Plat Required
4-19
R.
Review of Abstract and Covenants
4-20
S.
Final Plat Review
4-20
T.
Final Plat Approval
4-21
U.
Resubmittal of Denied Subdivision
4-21
V.
Final Plat Filing
4-22
W.
Amending Final Plats
4-22
PLAN AND PLAT APPLICATION INFORMATION REQUIREMENTS
A.
Submittal
5-1
B.
Permission to Enter
5-1
C.
Pre-Submittal Meeting
5-1
D.
Pre-Application Plan Submittal Requirements
5-1
E.
Submittal Requirements for All Subdivision Applications for Preliminary Plat Review
5-5
F.
Final Plat Contents
5-13
G.
Final Plat Submittal and Review
5-13
H.
Amending Approved Preliminary Plats Before Final Plat Approval
5-17
I.
Changes to Conditions of Final Plat Approval After Preliminary Plat Approval
5-18
J.
Final Plat Approval
5-19
K.
Final Plat Filing
5-19
L.
Amending Files Plats
5-20
DESIGN AND IMPROVEMENT STANDARDS, GENERAL
A.
General Standards
6-1
B.
Lots
6-5
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
6-16
I.
Sanitary Sewers
6-16
J.
Sewage Treatment Systems
6-16
K.
Solid Waste
6-17
L.
Utilities
6-17
M.
Water Supply System
6-17
N.
Mail Delivery
6-18
O.
Noxious Weeds
6-18
P.
Waiver of Right to Protest
6-19
Q.
Stormwater Management
6-19
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
7-5
F.
Access Road General Standards
7-5
G.
Access Road Improvement and Paving Standards
7-6
H.
Interior Subdivision Road Improvement Requirements
7-6
I.
Construction Standards for All Roads
7-7
J.
Pedestrian Facilities
7-13
K.
Trails Plan
7-13
L.
Transit
7-14
M
Subdivision within an Adopted Growth Policy of a City or Town
7-14
IMPROVEMENTS PROCEDURES
A.
Improvements
8-1
B.
Improvements Procedures
8-1
C.
Acceptance of Improvements
8-4
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
9-15
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
PLANNED UNIT DEVELOPMENT
A.
Intent
11-1
B.
Procedure and Submittal
11-1
C.
PUD Criteria
11-2
SUBDIVISIONS CREATED BY RENT OR LEASE & CONDOMINIUMS
A.
General
12-1
B.
Procedure
12-1
C.
Plans and Data
12-2
D.
Standards for Mobile Home Parks and Recreational Vehicle Parks
12-2
E.
Standards for Condominiums
12-5
ADMINISTRATIVE PROVISIONS
A.
Variances
13-1
B.
Amendments to Subdivision Regulations
13-2
C.
Administration
13-2
D.
Fee
13-3
E.
Corrections, Amendments, or Vacations of Recorded Final Plats
13-3
F.
Inaccurate or Incomplete Information
13-4
G.
Waivers
13-4
DIVISIONS OF LAND EXEMPT FROM SUBDIVISION REVIEW
A.
Purpose
14-1
B.
Divisions of Land Entirely Exempt from the Requirements of These Subdivision Regulations and the MSPA
14-1
C.
Specific Exemptions from Review but Subject to Survey Requirements
14-2
D.
Exemptions from Surveying and Filing, but Subject to Review
14-3
E.
Exemptions from Surveying and Platting Requirements for Land Acquired for State Highways.
14-3
F.
Procedures and General Requirements
14-4
G.
Exemptions as a Gift or Sale to a Member of the Immediate Family
14-5
H.
Agricultural Exemption
14-6
I.
Relocation of Common Boundary Lines
14-7
J.
Relocation of Common Boundaries within a Platted Subdivision
14-8
K.
Aggregation of Parcels or Lots within a Platted Subdivision
14-8
L.
Security for Mortgage, Liens, or Trust Indenture for the Purpose of Construction, Improvements to the Land Being Divided, or Financing Purposes
14-9
M.
Court Order
14-10
N.
Correction of Errors
14-10
O.
Uniform Standards for Certificates of Survey
14-10
P.
Procedure and Review of Subdivision Exemptions
14-10

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

LIST OF FIGURES AND TABLES
FIGURE 1.
Subdivision Lot Terms
6-6
FIGURE 7.A.
Gallatin County Typical Road Standards
7-12
TABLE 7.1.
Road Design Standards
7-8
TABLE 7.2.
Gravel and/or Paving Width Standards
7-9
TABLE 7.3.
Sub-Base Gravel
7-9
TABLE 7.4.
Crushed Top Surfacing Type A
7-10
TABLE 7.5
Subdivision Access Road Intersection Spacing
7-11