HomeMy WebLinkAboutRIDGEWOOD HILLS - FDP230019 - SUBMITTAL DOCUMENTS - ROUND 3 - Supporting Documentation (7) PROJECT: Ridgewood Hills Fifth Filing PDP190018 Natural Resources Mitigation Summary
Prepared by: Stephanie Blochowiak, Environmental Planner 12.11.2019
Feature Existing Mitigation Requirement Standard(s) & BMPs
Wetlands
▪ 5 wetlands – 102,660 sq ft or 2.36 ac
Wetland 1 (W1) – 2,908 sq ft or 0.0668 ac
Wetland 2 (W2) – 11,136 sq ft or 0.256 ac
Wetland 3 (W3) – 21,093 sq ft or 0.484 ac
Wetland 4 (W4) – 66,907 sq ft or 1.54 ac
Wetland 5 (W5) – 616 sq ft or 0.0141 ac
▪ No USACE jurisdictional wetlands
▪ 50-ft buffer for wetlands < 1/3 ac
▪ 100-ft buffer for wetlands > 1/3 ac w/o
significant use by waterfowl
▪ 1:1 ratio option - 2.36 ac total wetlands with
8.14 ac buffer equals 10.5 ac total space
*Priority keep in place: W4, W2, W1
*Highest ecological value: W4, W2, W1
Lowest ecological value: W3, W5
▪ 1:2 wetland to upland ratio option – ac TBD
If new hydrology will not sustain wetlands
Example: 0.5 ac wetlands can be mitigated
by providing 1.0 ac uplands
▪ LUC Section 3.4.1(D)(1-2)
▪ LUC Section 3.4.1(E)(1-2)
▪ LUC Section 3.4.1(F)(3)
▪ LUC Section 3.4.1(O)
Environmental Law Institute: Planner’s
Guide to Wetland Buffers for Local
Governments
CO Dept Natural Resources: Native
Plant Revegetation Guide for Colorado
City Seed Mixes including wetland,
mesic and detention pond mixes
Wildlife
Corridor
▪ Open or “day-lighted” North Louden Ditch
▪ Overlaps with W3 (Wetland 3)
▪ 50-ft buffer from ditch “top of bank” or edge of
wetlands
▪ Preference to keep these in place as small
wildlife corridors as City grows out and infills
▪ 1:1 ratio option – 4.28 ac total space
▪ LUC Section 3.4.1(D)(1-2)
▪ LUC Section 3.4.1(E)(1-2)
▪ NIC Policy LU6
Fort Collins Nature in the City (NIC)
Strategic Plan
American
kestrel
Nest /
Raptor
Use
▪ American kestrel nest cavity observed in large
plains cottonwood just south of community park
▪ No other raptor nests observed at this time
▪ Raptors observed foraging and roosting at the site
including American kestrel, red-tailed hawk,
Swainson’s hawk
▪ Raptor nests are considered City special features
*Preference keep in place based on cond./use
▪ Label American kestrel nest cavity on existing tree
protection /mitigation plan (could be likely #55 or
#54 or in G14) observed in large cottonwood
*For tree or nest removal contact USFWS
▪ Potential temporary limit of development for an
active nest Feb 15 – Jul 15
▪ LUC Section 3.4.1(A)(2)(d)
▪ LUC Section 5.1.2 Special habitat
features
The Cornell Lab: American kestrel
Low conservation concern and not a
CO CNHP watchlist or tracked species
Tree
Grove
Habitat
▪ Grove 1 (G1):
3 Cottonwoods < 6in DBH Fair Cond.
▪ Grove 2 (G2):
Russian olive < 8in DBH Fair Cond.
▪ Grove 3 (G3):
Siberian elm < 11in DBH Fair(P) Cond.
▪ Grove 4 (G4):
2 Cottonwoods 4in Good Cond.
▪ Grove 5 (G5):
8 Russian olive < 11in DBH Fair(+) Cond.
▪ Grove 6 (G6):
65 Russian olive/Siberian elm/ Crack willow
12-25in DBH Fair(-) and Fair(+) Cond.
▪ Grove 7 (G7):
3 Cottonwoods 4-13in Dead Cond.
▪ Grove 8 (G8):
Juniper bushes Fair(G) Cond.
▪ Grove 9 (G9):
5 Cottonwoods 2-4in DBH Fair Cond.
▪ Grove 10 (G10):
19 Russian olive/Siberian elm < 8in,11in DBH
Fair Cond.
▪ Grove 11 (G11):
11 Cottonwoods 3-23in DBH Fair(+)
▪ Grove 12 (G12):
15 Russian olive/Siberian < 8in, 11in DBH
Fair(-) Cond.
▪ Grove 13 (G13):
118 Cottonwoods 2-24in DBH Fair(G) Cond.
▪ Grove 14 (G14):
124 Cottonwoods 2-18in DBH Fair(G) Cond.
▪ Grove 15 (G15):
13 Cottonwoods 2-25in DBH Fair(+) Cond.
▪ Grove 16 (G16):
20 Cottonwoods 4-15in DBH Fair(+) Cond.
▪ City Forestry tree mitigation for significant
species trees ≥ 6in DBH and invasive species
Russian olive ≥ 8in DBH, Siberian elm ≥ 11in
(see full tree mitigation chart on plans for
full mitigation tree counts)
▪ City Environmental Planning ecological habitat
value priority groves to protect in place ranked
highest priority to lowest: G13, G6, G9, G1, G14,
G4, G11, G16, G15, G5, G2.
▪ City Environmental Planning habitat mitigation
for trees and groves desired species < 6in DBH,
and invasive species Russian olive < 8in DBH,
Siberian elm < 11in DBH minimums:
G1 is in W2 (see wetland mitigation)
G2 is in W2
G3 is in W2
G4 is in W2
G5 is in W2
G6 is in W2
G7 habitat mitigation: 1 3in caliper cottonwood
or 1 15-25in DBH deadwood log in NHBZ
G8 8 5-gallon evergreen shrubs
G9 overlaps w/ W1 (see wetland mitigation)
G10 overlaps w/ W3 (see wetland mitigation)
G11 overlaps w/ W3
G12 overlaps w/ W3
G13 overlaps w/ W3
G14 5 cottonwoods of various caliper sizes and
5 fruit-bearing ornamental trees and
addition of 60-75 low, medium and high
growing (height) native shrubs
incorporating at least 30 3 ga and 30 5 ga
sizes and 10 or more different native shrub
species into designed NHBZ
G15 habitat mitigation: 6 cottonwoods various
caliper sizes and 2 15-25in DBH deadwood
logs in NHBZ
G16 2 cottonwoods, 5 southwest white pines,
and 5 Rocky Mountain juniper
▪ LUC Section 3.2.1(C)
▪ LUC Section 3.2.1(F)(1-3)
▪ LUC Section 3.4.1(A)(1)
▪ LUC Section 3.4.1(E)(1)(c)
City of Fort Collins Natural Areas
Department - NAD Native Plants List
City of Fort Collins Natural Areas
Department – NAD Wildlife
Conservation Guidelines
Additional protection, mitigation and natural habitat buffer zone (NHBZ) design considerations.
• NHBZ design
o Incorporate species diversity into planting plan and especially native plants within natural habitat buffer zone areas.
o Incorporate diversity in vertical structure supporting vertical habitat types in addition to horizontal and ecological types.
o Cluster shrubs in groups of 3-5 for wildlife cover.
o Incorporate deciduous, fruit bearing and evergreen woody plants.
o Utilize City Natural Areas Department seed mixes that include preferred: detention basin, upland, alkaline, mesic and wetland species.
o Incorporate natural undulations in grading plans where NHBZ will be created especially when combined with stormwater management areas.
• Natural Habitat Buffer Zone standards in LUC 3.4.1 can be met through quantitative (setback) standards and/or qualitative (performance standards)
o There are nine (9) performance standards LUC 3.4.1(E)(1)(a-i):
(a) The project shall be designed to preserve or enhance the ecological character or function and wildlife use of the natural habitat or feature and to
minimize or adequately mitigate the foreseeable impacts of development.
(b) The project, including, by way of example and not by way of limitation, its fencing, pedestrian/bicycle paths and roadways, shall be designed to
preserve or enhance the existence of wildlife movement corridors between natural habitats and features, both within and adjac ent to the site.
(c) The project shall be designed to preserve existing trees and vegetation that contribute to the site's ecological, shade, canopy, aesthetic, habitat and
cooling value. Notwithstanding the requirements of Section 3.2.1(F), all trees and vegetation within the Limits of Development must be preserved or,
if necessary, mitigated based on the values established by the Ecological Characterization Study or the City Environmental Planner. Such mitigation,
if necessary, shall include trees, shrubs, grasses, or any combination thereof, and must be planted within the buffer zone.
(d) The project shall be designed to protect from adverse impact species utilizing special habitat features such as key raptor habitat features,
including nest sites, night roosts and key feeding areas as identified by the Colorado Parks and Wildlife Division ("CPW") or the Fort Co llins
Natural Areas Department ("NAD"); key production areas, wintering areas and migratory feeding areas for waterfowl; heron rookeries; key use areas
for wading birds and shorebirds; key use areas for migrant songbirds; key nesting areas for grassland birds; fox and coyote d ens; mule deer winter
concentration areas as identified by the CPW or NAD; prairie dog colonies one (1) acre or greater in size; key areas for rare, migrant or resident
butterflies as identified by the NAD; areas of high terrestrial or aquatic insect diversity as identified by the NAD; remnant native prairie habitat;
mixed foothill shrubland; foothill ponderosa pine forest; plains cottonwood riparian woodlands; and wetlands of any size.
(e) The project shall be designed so that the character of the proposed development in terms of use, density, traffic generation, quality of runoff
water, noise, lighting and similar potential development impacts shall minimize the degradation of the ecological character or wildlife use of the
affected natural habitats or features.
(f) The project shall be designed to integrate with and otherwise preserve existing site topography, including, but not limited to, such characteristics
as steepness of slopes, existing drainage features, rock outcroppings, river and stream terraces, valley walls, ridgelines an d scenic topographic
features.
(g) The project shall be designed to enhance the natural ecological characteristics of the site. If existing landscaping within the buffer zone is
determined by the decision maker to be incompatible with the purposes of the buffer zone, then the applicant shall undertake restoration and
mitigation measures such as regrading and/or the replanting of native vegetation.
(h) The project may be designed to provide appropriate human access to natural habitats and features and their associated buffer zones in order to
serve recreation purposes, provided that such access is compatible with the ecological character or wildlife use of the natural habitat or feature.
(i) Fencing associated with the project shall be designed to be compatible with the ecological character and wildlife use of the natural habitat or
feature.
LANDSCAPE LEGEND:
IRRIGATED SOD
(3 TYPE BLUEGRASS HYBRID BLEND W/
20% TEXAS BLUEGRASS)
EDGER (RE: LP502)
DETENTION BASIN SEED
MIX RE: SCHEDULE
WETLAND SEED MIX
RE: SCHEDULE
LANDSCAPE SCHEDULE
UPLAND SEED MIX
RE: SCHEDULE
MITIGATION TREE
IRRIGATED SRP RTF SOD
(30% REDUCTION WATER
USE - TURF MASTER)
IRRIGATED COOL SEASON
WHEATGRASS SEED MIX
COBBLE MULCH
TYPE: 3-6' DIA.
RIVER ROCK
WOOD MULCH
TYPE: GORILLA HAIR
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LANDSCAPE SCHEDULE
REFER TO WETLAND SCHEDULE FOR WETLAND TREES
SYMBOL BOTANIC NAME COMMON NAME
DECIDUOUS TREES
ACER NEGUNDO 'SENSATION'SENSATION BOXELDER
(NON-STREET TREE)
ACER SACCHARUM GREEN MOUNTAIN MAPLE
'GREEN MOUNTAIN'
PLATANUS ACERIFOLIA EXCLAMATION! LONDON
'MORTON CIRCLE'PLANETREE
GYMNOCLADUS DIOICUS ESPRESSO KENTUCKY
'ESPRESSO' COFFEE TREE
QUERCUS MUEHLENBERGII CHINKAPIN OAK
QUERCUS BUCKLEYI TEXAS RED OAK
ACER SACCHARUM CADDO MAPLE
'JOHN PAIR'
ULMUS 'ACCOLADE'ACCOLADE ELM
ULMUS DAVIDIANA VAR. DISCOVERY ELM
JAPONICA 'DISCOVERY'
ACER SACCHARUM 'BAILSTA'FALL FIESTA MAPLE
TILIA AMERICANA ‘BOULEVARD’BOULEVARD LINDEN
ORNAMENTAL TREES
SYMBOL BOTANIC NAME COMMON NAME
ACER TATARICUM 'HOT WINGS'HOT WINGS TATARIAN MAPLE
AMELANCHIER CANADENSIS SERVICEBERRY
'AUTUMN BRILLANCE'(MULTI-STEM)
SYRINGA RETICULATA IVORY SILK JAPANESE TREE LILAC
'IVORY SILK'
MALUS 'RADIANT'RADIANT CRABAPPLE
MALUS X 'SPRING SNOW'SPRING SNOW CRABAPPLE
MALUS X 'RED BARON'RED BARON CRABAPPLE
PRUNUS CERASIFERA CRIMSON POINT PLUM
'CIPRIOZAM'
QUERCUS GAMBELLI GAMBEL OAK
(MULTI-STEM)
CRATAEGUS CRUSGALLI THORNLESS COCKSPUR
INERMIS HAWTHORN
QUERCUS X WAREI 'NADLER' KINDRED SPIRIT OAK
CELTIS OCCINDENTALIS PRAIRIE SENTINEL HACKBERRY
'PRAIRIE SENTINEL'
TILIA AMERICANA ‘BOULEVARD’BOULEVARD LINDEN
CELTIS OCCINDENTALIS HACKBERRY
EVERGREEN TREES
SYMBOL BOTANIC NAME COMMON NAME
PINUS EDULIS PINYON PINE
PINUS FLEXILIS LIMBER PINE
PICEA PUNGENS 'HOOPSII'HOOPS BLUE SPRUCE
JUNIPERUS SCOPULORUM WOODWARD COLUMNAR
'WOODWARD'
A PERMIT MUST BE OBTAINED FROM THE CITY FORESTER BEFORE ANY TREES OR SHRUBS AS NOTED ON
THIS PLAN ARE PLANTED, PRUNED OR REMOVED IN THE PUBLIC RIGHT-OF-WAY. THIS INCLUDES ZONES
BETWEEN THE SIDEWALK AND CURB, MEDIANS AND OTHER CITY PROPERTY. THIS PERMIT SHALL APPROVE
THE LOCATION AND SPECIES TO BE PLANTED. FAILURE TO OBTAIN THIS PERMIT IS A VIOLATION OF THE CITY
OF FORT COLLINS CODE SUBJECT TO CITATION (SECTION 27-31) AND MAY ALSO RESULT IN REPLACING OR
RELOCATING TREES AND A HOLD ON CERTIFICATE OF OCCUPANCY.
Sheet
Sheet Name
Checked By:
Drawn By:
Date:
JB
SW
JUNE 2024
FINAL PLAN SUBMITTAL
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LP101
OVERALL
LANDSCAPE PLAN
0 40'80'80'160'N O R T H