C150347 Feasibility Study

• Contract/PO #: C150347
• Contractor Name: Greeley, City Of
• Contract Type: Loan
• Water District: 3
• County: Larimer
• Loan Projects - Doc Type: Feasibility Study

K. Transportation System
County Roads:
42.3 miles
CDOT Highways:
24.7 miles
Forest Service:
40.6 miles
Private Roads:
98.5 miles
Trails:
9 miles
PART III - WATERSHED CONDITION
A. Burn Severity (acres)
Total Acres Burned:
Unburned
Low
Moderate
High
87,487
14,072 (16.1%)
32,302 (36.9 %)
35,399 (40.4 %)
5,714 (6.5 %)
A Burned Area Reflectance Classifications (BARC) image was obtained on 06/18/2012. Approximately
50,000 acres was covered by the 06/18 image. Additional BARC coverage was requested but, due to
cloud cover, additional imagery was not available. The BAER Team mapped the remaining acreage on
the west and north sides of the fire based on aerial and ground reconnaissance of the burned area. Soil
burn severity observations and mapping were based on criteria outlined in the Field Guide for Mapping
Post Fire Soil Bum Severity. An additional 7,685 acres (The Hewlett Fire) was recently burned in May,
2012. The High Park Fire burned to the western and southern flanks of the Hewlett Fire.
The cumulative effect of increased peak flows and sediment laden flows from both burned areas
increases the risk for various downstream values at risk, particularly effects on human life and safety,
property and natural resources, including drinking and irrigation water providers.
A soil burn severity map is included at the end of the report.
B. Water - Repellent Soil
Water Repellent Soil: 12,238 acres
Water repellency was observed in the field under moderate and high soil burn severity in shrub and
forest vegetation types. It was estimated that 30% of the high and moderate severity burn is water
repellent.
C. Soil Erosion Hazard Rating
Low 7,867 acres
Moderate 30,009 acres
High 48,798 acres
High Park Fire Emergency Stabilization Plan Page 4