City of Grand Junction, CO
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2024-08-02
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Volume II Development Regulations
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Title 28 Stormwater Management Manual
- The Charter
- Ttl CHA The Charter of the City of Grand Junction, Colorado
- Municipal Code
- Ttl 1 General Provisions
- Ttl 2 Administration and Personnel
- Ttl 3 Revenue and Finance
- Ttl 4 (Reserved)
- Ttl 5 Business Licenses and Regulations
- Ttl 6 Animals
- Ttl 7 (Reserved)
- Ttl 8 Health and Safety
- Ttl 9 Public Peace, Morals and Welfare
- Ttl 10 Traffic and Vehicles
- Ttl 11 (Reserved)
- Ttl 12 Streets, Sidewalks and Public Property
- Ttl 13 Water and Sewers
- Ttl 14 (Reserved)
- Ttl 15 Buildings and Construction
- Apx A Franchises
- Apx B Tables
- Development Regulations
- Ttl 21 Zoning and Development Code
- Ttl 22 H Road/Northwest Area Plan
- Ttl 23 North Avenue Overlay Zone District
- Ttl 24 Greater Downtown Overlay
- Ttl 25 24 Road Corridor Design Standards
- Ttl 26 North Seventh Street Historic Residential District Guidelines and Standards
- Ttl 27 Horizon Drive District – Overlay Zone District Standards
- Ttl 28 Stormwater Management Manual
- Ch 28.04 Introduction
- § 28.04.010 General index.
- § 28.04.020 Purpose and intent.
- § 28.04.030 Amendments to this manual.
- § 28.04.040 Purchase of a copy of the manual codified in this title.
- § 28.04.050 Acknowledgement.
- § 28.04.060 Updating and revisions.
- Ch 28.08 General Provisions
- § 28.08.010 Title.
- § 28.08.020 Jurisdiction.
- § 28.08.030 Adoption authority.
- § 28.08.040 Enforcement responsibility.
- § 28.08.050 Review and acceptance.
- § 28.08.060 Interpretation.
- § 28.08.070 Deviation/variance procedures.
- § 28.08.080 Acronyms.
- § 28.08.090 Definitions.
- Ch 28.12 Drainage Planning Submittal Requirements
- § 28.12.010 Review process.
- § 28.12.020 Submittal requirements.
- § 28.12.030 Conceptual/preliminary drainage report.
- § 28.12.040 Conceptual/preliminary report contents.
- § 28.12.050 Conceptual/preliminary report drawing contents.
- § 28.12.060 Final drainage report.
- § 28.12.070 Final report contents.
- § 28.12.080 Final report drawing contents.
- § 28.12.090 Construction plans.
- § 28.12.100 Post-construction BMPs.
- § 28.12.110 Construction SWMP.
- § 28.12.120 Record drawings and acceptances.
- § 28.12.130 Submittal checklist.
- Ch 28.16 Drainage Policy
- § 28.16.010 Introduction.
- § 28.16.020 Basic principles.
- § 28.16.030 Regional and local planning.
- § 28.16.040 Regional master planning.
- § 28.16.050 Drainage improvements.
- § 28.16.060 Drainage fee calculation.
- § 28.16.070 Proposed drainage improvements.
- § 28.16.080 Floodplain management.
- § 28.16.090 Storm runoff detention.
- § 28.16.100 Storm runoff retention.
- § 28.16.110 Stormwater quality.
- § 28.16.120 Drainage facilities maintenance.
- § 28.16.130 Watershed transfer of storm runoff.
- § 28.16.140 Technical criteria – Stormwater management technology.
- § 28.16.150 Technical criteria – Design storm events.
- § 28.16.160 Technical criteria – Storm runoff determination.
- § 28.16.170 Technical criteria – Streets.
- § 28.16.180 Technical criteria – Flood proofing.
- § 28.16.190 Technical criteria – Alluvial fans.
- § 28.16.200 Irrigation facilities.
- § 28.16.210 Irrigation facilities – Watershed analysis.
- § 28.16.220 Irrigation facilities – Discharge to irrigation conveyance facility.
- § 28.16.230 Irrigation facilities – Irrigation reservoirs.
- § 28.16.240 Preservation of natural drainageways.
- Ch 28.20 (Reserved)
- Ch 28.24 Rainfall
- § 28.24.010 Introduction.
- § 28.24.020 Data sources.
- § 28.24.030 Comparison to NOAA Atlas 14.
- § 28.24.040 Rainfall analysis – Rainfall depth – Duration – Frequency.
- § 28.24.050 Rainfall analysis – Rainfall depths for durations from one to six hours and less than one hour.
- § 28.24.060 Rainfall analysis – Mean annual precipitation and storm events.
- § 28.24.070 Depth-area reduction factors.
- § 28.24.080 Intensity-duration-frequency curves for rational method.
- § 28.24.090 Design storms.
- Ch 28.28 Storm Runoff
- § 28.28.010 Introduction.
- § 28.28.020 Watershed characteristics.
- § 28.28.030 Time of concentration.
- § 28.28.040 Nonurbanized watersheds.
- § 28.28.050 Urbanized watersheds.
- § 28.28.060 Precipitation losses.
- § 28.28.070 SCS curve number method.
- § 28.28.080 CN determination.
- § 28.28.090 Green and Ampt method.
- § 28.28.100 Rational formula method.
- § 28.28.110 SCS unit hydrograph method.
- § 28.28.120 Channel routing of hydrographs.
- § 28.28.130 Reservoir routing of hydrographs.
- Ch 28.32 Open Channels
- § 28.32.010 Introduction.
- § 28.32.020 Parameters and terms commonly used in open channel analysis and design.
- § 28.32.030 General open channel flow.
- § 28.32.040 Uniform flow computation.
- § 28.32.050 Critical flow computation.
- § 28.32.060 Design procedures – Subcritical flow.
- § 28.32.070 Design procedures – Supercritical flow.
- § 28.32.080 Design procedures – Superelevation.
- § 28.32.090 Transitions.
- § 28.32.100 Types of open channels and their selection.
- § 28.32.110 Natural channel systems.
- § 28.32.120 Channel morphology.
- § 28.32.130 Channel restoration.
- § 28.32.140 General design criteria for improved open channels.
- § 28.32.150 Channel type selection.
- § 28.32.160 Hydraulic capacity.
- § 28.32.170 Manning roughness coefficient.
- § 28.32.180 Uniform flow.
- § 28.32.190 Vertical and horizontal alignment.
- § 28.32.200 Maximum permissible velocity.
- § 28.32.210 Subcritical and supercritical flow.
- § 28.32.220 Freeboard.
- § 28.32.230 Flow transitions.
- § 28.32.240 Access and safety.
- § 28.32.250 Environmental permitting.
- § 28.32.260 Maintenance.
- § 28.32.270 Design criteria for natural and alluvial-bed (erodible) channels.
- § 28.32.280 Grass-lined channels.
- § 28.32.290 Wetland-bottom channel.
- § 28.32.300 Design criteria – Riprap-lined channels.
- § 28.32.310 Design criteria – Concrete-lined channels.
- § 28.32.320 Design criteria – Other channel linings.
- § 28.32.330 Design standards for minor artificial drainageways.
- § 28.32.340 Channel appurtenances.
- § 28.32.350 Example application.
- Ch 28.36 Additional Hydraulic Structures
- § 28.36.010 Introduction.
- § 28.36.020 Channel drop structures.
- § 28.36.030 Grouted sloping boulder (GSB) drop structure.
- § 28.36.040 Vertical riprap drop structure (vertical hard drop basin).
- § 28.36.050 Straight drop spillway.
- § 28.36.060 Baffled aprons (USBR Type IX, baffle chute drop).
- § 28.36.070 Energy dissipation structures.
- § 28.36.080 Increased roughness basins.
- § 28.36.090 Induced hydraulic jump basins.
- § 28.36.100 Impact basins.
- § 28.36.110 Overbank prevention structures and wasteways.
- § 28.36.120 Side-channel spillways.
- § 28.36.130 Gated turnouts.
- § 28.36.140 Pipe appurtenances.
- § 28.36.150 Pipe collars.
- § 28.36.160 Thrust blocks at pipe bends.
- § 28.36.170 Valves.
- Ch 28.40 Storm Drain Systems
- § 28.40.010 Introduction.
- § 28.40.020 Storm drain design criteria.
- § 28.40.030 Storm drain design criteria – Allowable capacity.
- § 28.40.040 Storm drain design criteria – Allowable velocity.
- § 28.40.050 Storm drain design criteria – Pipe roughness.
- § 28.40.060 Storm drain design criteria – System layout.
- § 28.40.070 Storm drain hydraulics.
- § 28.40.080 Gravity-flow analysis.
- § 28.40.090 Pressure-flow analysis.
- § 28.40.100 Computer hydraulic modeling.
- § 28.40.110 Construction standards.
- § 28.40.120 Storm drain pipe.
- § 28.40.130 Manholes.
- § 28.40.140 Inlets.
- § 28.40.150 Outlets.
- § 28.40.160 Storm drain system design.
- § 28.40.170 Initial storm drain design.
- § 28.40.180 Preliminary/final storm drain design.
- § 28.40.190 Example design application.
- Ch 28.44 Streets
- § 28.44.010 Introduction.
- § 28.44.020 Streets as part of the drainage system.
- § 28.44.030 Drainage impacts on traffic and streets.
- § 28.44.040 Sheet flow.
- § 28.44.050 Gutter flow.
- § 28.44.060 Temporary ponding and localized cross flow.
- § 28.44.070 Pavement deterioration effects.
- § 28.44.080 Sedimentation and debris.
- § 28.44.090 Street classification and allowable flow depth and velocities.
- § 28.44.100 Street hydraulic capacity evaluation.
- § 28.44.110 Storm inlet selection, sizing, and location.
- § 28.44.120 Hydraulic capacity of inlets on a continuous grade.
- § 28.44.130 Hydraulic capacity of inlets in sump conditions.
- § 28.44.140 Inlet clogging considerations.
- § 28.44.150 Grate selection and rating.
- § 28.44.160 Inlet location and spacing.
- Ch 28.48 Culverts and Bridges
- § 28.48.010 Introduction.
- § 28.48.020 Culvert hydraulics.
- § 28.48.030 Required design information.
- § 28.48.040 Inlet control.
- § 28.48.050 Outlet control.
- § 28.48.060 Culvert sizing and design.
- § 28.48.070 Size and material.
- § 28.48.080 Location.
- § 28.48.090 Culvert Design Form.
- § 28.48.100 Inlet control calculation.
- § 28.48.110 Outlet control calculation.
- § 28.48.120 Evaluation of results.
- § 28.48.130 Outlet velocity calculation.
- § 28.48.140 Computer applications.
- § 28.48.150 Outlet protection.
- § 28.48.160 Trash/safety racks.
- § 28.48.170 Culvert inlets.
- § 28.48.180 Projecting inlets.
- § 28.48.190 Inlets with headwalls.
- § 28.48.200 Tapered inlets.
- § 28.48.210 Bridge hydraulics.
- § 28.48.220 Hydraulic analysis.
- § 28.48.230 Expression of backwater.
- § 28.48.240 Backwater coefficient.
- § 28.48.250 Effect of M and abutment shape (base curves).
- § 28.48.260 Effect of piers (normal crossings).
- § 28.48.270 Bridge sizing and design.
- § 28.48.280 Example application – Culvert sizing.
- Ch 28.52 Irrigation/Drainage Structures
- § 28.52.010 Introduction.
- § 28.52.020 Irrigation ditch crossings (cross-drainage structures).
- § 28.52.030 Inverted siphons.
- § 28.52.040 Overchutes (flumes and pipe overchutes).
- Ch 28.56 Detention and Retention
- § 28.56.010 Introduction.
- § 28.56.020 Detention versus retention.
- § 28.56.030 Local detention facilities.
- § 28.56.040 Regional detention facilities.
- § 28.56.050 Drainage fee in lieu of detention.
- § 28.56.060 Drainage fee basis.
- § 28.56.070 Drainage fee calculation.
- § 28.56.080 Detention for management of stormwater quality.
- § 28.56.090 Design storm criteria.
- § 28.56.100 Geometric requirements.
- § 28.56.110 Dry basin bottom drainage.
- § 28.56.120 Accessibility and maintenance.
- § 28.56.130 Calculating storage volume available.
- § 28.56.140 Groundcover and landscaping.
- § 28.56.150 Freeboard requirements.
- § 28.56.160 State Engineer’s Office.
- § 28.56.170 Embankment protection.
- § 28.56.180 Inlet and outlet design.
- § 28.56.190 Off-site flows.
- § 28.56.200 Retention.
- § 28.56.210 Hydrologic design methods and criteria.
- § 28.56.220 HEC-1 method.
- § 28.56.230 Rational method.
- § 28.56.240 Compensating detention analysis.
- § 28.56.250 Over-detention analysis.
- § 28.56.260 Hydraulic design of outlet works.
- Ch 28.60 Construction Site Stormwater Runoff Control
- § 28.60.010 Introduction.
- § 28.60.020 Colorado discharge permit.
- § 28.60.030 Standards and requirements – Stormwater discharge limitations.
- § 28.60.040 Standards and requirements – Minimum BMP requirements.
- § 28.60.050 Standards and requirements – Acceptable BMPs.
- § 28.60.060 Stormwater permit.
- § 28.60.070 Stormwater permit variance/exception.
- § 28.60.080 Inspection and enforcement – Mesa County.
- § 28.60.090 Inspection and enforcement – City of Grand Junction.
- § 28.60.100 Inspection and enforcement – Other municipalities.
- § 28.60.110 Construction SWMP.
- § 28.60.120 Site description.
- § 28.60.130 Site map.
- § 28.60.140 Stormwater management controls.
- § 28.60.150 Final stabilization and long-term stormwater management.
- § 28.60.160 Inspection and maintenance.
- § 28.60.170 Certification.
- § 28.60.180 Estimated BMP costs.
- § 28.60.190 Permit transfer requirements.
- § 28.60.200 Checklist.
- Ch 28.64 Post-Construction Stormwater Management
- § 28.64.010 Introduction.
- § 28.64.020 Standards for best management practices (BMPs) – Minimum structural BMPs requirements.
- § 28.64.030 Standards for best management practices (BMPs) – Aesthetic requirements.
- § 28.64.040 Standards for best management practices (BMPs) – Proprietary BMPs.
- § 28.64.050 Standards for best management practices (BMPs) – Considerations in BMPs selection.
- § 28.64.060 Standards for best management practices (BMPs) – Local modifications to minimum structural BMPs.
- § 28.64.070 Final drainage report.
- § 28.64.080 Water quality capture volume.
- § 28.64.090 Directly connected impervious area.
- § 28.64.100 Water quality capture volume.
- § 28.64.110 Nonstructural BMPs – General information.
- § 28.64.120 Nonstructural BMPs – Spill prevention and response.
- § 28.64.130 Inspection and enforcement.
- § 28.64.140 BMPs for industrial and commercial activities.
- § 28.64.150 Industrial and commercial activities.
- § 28.64.160 Best management practices.
- Ch 28.68 Standard Forms
- § 28.68.010 Hydrologic and hydraulic design forms.
- § 28.68.020 Stormwater permit applications and report forms.
- Ch 28.72 References
- § 28.72.010 References.
- Ch 28.76 Drainage Law
- § 28.76.010 Introduction.
- § 28.76.020 Historical evolution of surface water drainage law.
- § 28.76.030 Legal principles.
- § 28.76.040 Local governments – Drainage responsibilities and powers.
- § 28.76.050 Applicable drainage laws.
- § 28.76.060 Special matters – Irrigation ditches.
- § 28.76.070 Special matters – Ditch owner’s duty to maintain, use and manage their ditches.
- § 28.76.080 Special matters – Water quality.
- § 28.76.090 Special matters – Economic loss rule – Duty of care.
- § 28.76.100 Special matters – Water rights and drainage improvements.
- § 28.76.110 Special matters – Governmental entity not liable for refusal to issue certificate of occupancy of residence constructed in a floodplain.
- § 28.76.120 Special matters – Any legislatively formulated assessment, fee or charge that is imposed on a broad class of property owners by a local government is not considered taking of property.
- § 28.76.130 Special matters – Governmental immunity in regard to irrigation and drainage ditches used as part of stormwater drainage system.
- § 28.76.140 Special matters – Concerning interference with the flow of water in ditch.
- Ch 28.80 Excerpts From UDSCD Volume 3
- § 28.80.010 Excerpts from UDSCD Volume 3.
- Ch 28.84 Cross-Reference Table
- § 28.84.010 Cross-reference table.
- Ttl 29 Transportation Engineering Design Standards (Teds)
- Comprehensive Plan
- Ttl 31 Comprehensive Plan
- Ttl 32 North Avenue Corridor
- Ttl 33 24 Road Corridor Subarea Plan
- Ttl 34 Redlands Area Plan
- Ttl 35 (Reserved)
- Ttl 36 Greater Downtown Plan
- Ttl 37 Pear Park Neighborhood Plan
- Ttl 38 (Reserved)
- Ttl 39 Orchard Mesa Neighborhood Plan
- Policies
- Ttl 41 Purchasing Policy and Procedure Manual
- Ttl 42 Emergency Management
- Ttl 43 Accessory Dwelling Unit Production Program
- Ttl 44 Planning Agreements
- Ttl 45 Waters, Sewers and Sanitation Districts
[Prior legislation – Res. 68-94.]
