HomeMy WebLinkAbout1.14 Impact AnalysisHalf Moon Subdivision, Battlement Mesa, CO September 30, 2021
Drainage Report 1
Impact Analysis
Half Moon
Subdivision
Battlement Mesa,
CO
September 30, 2021
Prepared by
Daniel Stewart, P.E.
Roaring Fork Engineering
592 Highway 133
Carbondale, CO 81623
Half Moon Subdivision, Battlement Mesa, CO September 30, 2021
Drainage Report 2
Adjacent Lane Use
Areas within 1,500 feet to the south and west of the proposed Half Moon Subdivision are single
family housing units. These housing developments make up The Villages Subdivisions of Canyon
View and Stone Ridge. Directly north of the Half Moon Subdivision is a dry arroyo that separates
the Valley View Village Subdivision by approximately 300 feet. Also bordering the proposed
subdivision to the north is privately owned open space and a transmission powerline and
easement approximately 550 feet to the northwest. To the east of the Halm Moon Subdivision is
vacant land and beyond the vacant land is Stone Quarry Road and the Garfield County School
District Administration Building on the opposite side of Stone Quarry Road approximately 800 feet
from the subdivision.
Site Features
The subdivision property is relatively flat, previously disturbed ground. It is surrounded on the
south and west by Northstar Trail Road, and to the North by a dry arroyo that is approximately
twenty feet deep. There is no running water through the site and no high ground water in the
area. The site is moderately covered by native grass that matches the semi-arid climate of the
Battlement Mesa area. No offsite drainage enters the property and due to the ground cover and
slope, the historic stormwater discharge off the site is minimal.
Geology and Hazard
There is no man made or natural hazards in the area. There is a dry arroyo to the north of the
property with a designated FEMA flood plain that the subdivision is well out of and no other
flooding threats exist in the area.
Groundwater and Aquifer Recharge Areas
The area of the subdivision is relatively flat with slopes up to ten percent. The soil characteristic is
Potts loam, a well-drained loam and clay soil type with a high runoff class. See the attached
geotechnical report for further information on soils and ground conditions. There is a dry arroyo to
the north of the property with a designated FEMA flood plain that the subdivision is well out of.
The subdivision will be serviced by Battlement Mesa Metro District sanitary sewer connection so
no onsite wastewater is proposed. No groundwater was encountered within the investigative
borings of up to twenty feet deep and the subdivision has proposed bio treatment facilities to treat
stormwater runoff and release to natural drainage patterns at a historic rate.
Environmental Impacts
The existing site consists of previously disturbed/graded land with moderately covered vegetation
consisting of native grasses. There are no wildlife bedding areas, burros or nesting areas within
the proposed area of disturbance.
a. Short-term effects on flora and fauna will be a complete removal of all ground cover on
the site for construction. Long-term effects on flora and fauna will significantly improve
with the addition of landscaped yards and open spaces and well as mandatory tree
plantings on properties and described in the HOA guidelines.
b. There will be no effect on critical wildlife habitat as none currently exist.
c. There are no domesticated animals on the site as the land is privately owned vacant
space and not agricultural. There are no visible game trails or any sign that the site is
used commonly by wildlife. From these observations it is concluded that there are no
Half Moon Subdivision, Battlement Mesa, CO September 30, 2021
Drainage Report 3
impacts to migration routes or use patterns and no other disruption to wildlife in the
area.
d. There is no potential for radiation hazards in the area and none have been identified by
the State or County Health Departments.
Nuisance
During construction activities it is likely that dust and emissions from construction equipment will
have the potential to travel to nearby properties depending on wind direction. It is anticipated
these affects will be minimal as the construction activities will be required to follow standard
environmental procedure and dust mitigation protocols. Nearby residences will be impacted by
noise from construction activities and could feel slight vibrations from compaction equipment
during road and utility construction but will be limited to daytime construction hours of operation.
Hour of Operation
During construction of the Half Moon Subdivision, hours of operation will be during daytime
working ours not expected to exceed 7:00 o’clock A.M. to 6 o’clock P.M. mountain standard time.
The hours of operation of the completed subdivision are not applicable as it a residential use.