City of Durango, Colorado: Rafting and Water Flows: A Survey and Analysis of Lower Animas Commerical Operators

• Description: Durango RICD
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 9/1/2006
• Author: RPI Consulting Inc.
• Title: City of Durango, Colorado: Rafting and Water Flows: A Survey and Analysis of Lower Animas Commerical Operators
• Water Supply Pro - Doc Type: Report/Study

City of Durango: Animas Basin Residential Buildoul and Water Demand Study Final Report 2006
3. Future residential development potential calculations assume one unit per
unimproved platted lot.
GIS spatial analysis steps used for estimating future potential residential units in
future subdivisions
1. Using Geologic Hazards mapping along See I Map 2: Lit Plata
with parcel coverage obtained from La Deiv�ities and Constraints
Plata County GIS, identify areas of
non - subdivision parcels that are covered by landslides and unstable slopes
and areas that are not covered by Geologic constraints.
2. Method for areas free of geologic constraint
Measure constraint -free acreage of each parcel
Divide total acreage of each parcel by minimum and maximum planning
area densities as listed in Table 1 to obtain the potential subdivision lots.
Each future lot is assumed to accommodate one dwelling unit.
3. Method for areas having geological constraint
Measure acreage of constrained land for each parcel.
Language in the
official La Plata County district
plans
for North
County,
Junction Creek, and West Durango state that each
35
acres of
critical
lands' may have
one residential unit while each
35 acres that is
entirely
preserved can earn up to two units on the non
- critical
lands on
the
property. Thus,
the density range for areas of
unstable
slopes
and
landslides range
from 17.5 acres per unit to 35
acres
per unit.
Total acreage of constrained area on each parcel was divided by the
minimum and maximum critical lands density to obtain potential subdivision
lots on critical lands.
Each future lot is assumed to accommodate one dwelling unit.
4. Development rights of non - subdivision parcels too small to subdivide were
accounted for in the mathematics. Any case where theoretical subdivisions of
each lot resulted in less than two total lots defaults to 1 allowable unit.
I Critical lands include unstable slopes and landslides and contained in the Constraints map included with this
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