HomeMy WebLinkAboutPlans - 03/24/202595% Design
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03/24/2025
95% Design
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GENERAL NOTES:
1.The contractor shall locate all utilities on-site, coordinate construction with all utility owners and be responsible for protecting all utilities during construction. The contractor must schedule any required utility adjustments with the utility owner to eliminate conflicts.
2.The contractor shall conform to all plan and specifications shown herein and notify the project engineer immediately upon the discovery of conflicts or changes not consistent with the contract documents.
3.The contractor shall have copies of any required permits on site at all times and comply with all requirements of all permits at all times. These permits include any federal, state, or local permits.
4.The contractor is responsible for, but not limited to, submitting plans for delivery and storage of materials and site equipment as well as for site access, erosion control, traffic control, water control and de-watering plans, prior to construction.
5.The contractor is responsible for protecting all existing site infrastructure and vegetation as directed by the project engineer, including but not limited to, concrete, asphalt, site circulation paths, curb and gutter, trees, shrubs, grasses and all soft or hardscape outside of the immediate construction area and its replacement in the
event of damage to equal or better condition.
6.The contractor is responsible for construction survey including, but not limited to, construction staking and protection of control point locations and elevations. Control points shall be the responsibility of the contractor to replace in the event of damage/lost control.
7.In areas of disturbance, the contractor shall remove and stockpile the top 6" of topsoil and replace and re-vegetate after construction. Salvaged topsoil shall be stockpiled in areas that shall not interfere with construction phases and at least 15 feet away from areas of concentrated flows or pavement. The slopes of the stockpile
shall not exceed 2:1 horizontal to vertical. A silt fence or other adequate erosion control shall be installed around the perimeter of each stockpile. Topsoil from any riparian areas shall be stockpiled separately from other topsoil and shall be reinstalled in riparian areas.
8.If previously unknown historic or archeological remains are discovered during construction, the contractor must immediately stop work and notify both the owner's representative and prime contractor of these items and work may not commence until written approval is given to proceed.
9.The contractor must be available and provide all necessary resources for periodic inspections from regulatory agencies, including but not limited to the United States army corps of engineers or the Colorado Department of Public Health and environment, at any time during the construction time period. This period includes pre-
construction and post-construction.
10.The contractor must meet all requirements for bmp's as described in the construction specifications and permits.
11.The contractor is responsible for monitoring all site safety requirements and regulations through the entire duration of on-site construction activities.
12.The contractor shall obtain at their expense any and all discharge permits necessary to perform the work described herein, which may be subject to the provisions of the national pollutant discharge elimination system permits.
13.The contractor is responsible for managing a safe site in accordance with local codes and regulations.
1. Follow external SWMP completed by JR Engineering.
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EROSION AND SEDIMENT CONTROL NOTES:
REVEGETATION/BIOENGINEERING NOTES:
1. All seed must be inspected by the Environmental Planner and contractor prior to installation, and all tags must be maintained for documentation. All seed must be labeled as "certified" by the Colorado seed growers association and shall not include the presence of noxious or invasive species prohibited under the Colorado seed
act. Seed must be free of Colorado state noxious and Colorado A and B listed weed propagules shall not contain more than 0.01% by dry weight of cheatgrass (Bromus tectorum), smooth brome (Bromus inermis), or Canada thistle (Cirsium arvensis). Project engineer or their representative shall approve all seed mixes for weed
content and substitutions before seed is purchased. Seed identification and certification tags shall be provided to the project manager for review and approval prior to use.
2. All seed bed preparations will be inspected by the environmental planner after prep has been done but before seeding begins.
3. A restoration ecologist should be consulted when reviewing weed-free seed, soil, mulch, and soil amendment products, including the list of potential weeds present in the product in question.
4. Seeding shall be broadcast at rates listed in seed mix, raked into the soil surface to a depth of between 0.125 and 0.25 inches deep, and covered with mulch at a rate that attains 70% soil coverage and is no deeper than 1".
5. THE SEED MIXES SHALL BE APPLIED TO AREAS AS SHOWN ON THE PLAN SET.
6. The time of year seeding is to occur shall be November 1 through April 7 (early spring date to allow for more vernalization of forb species).
7. Pre-seeding inspections to evaluate final seedbed prep are required prior to seeding. Coordinate with Sr. Inspector, Natural Resources Zoning or the Environmental Planner for inspections.
8. Prepare soil as necessary and appropriate for native seed mix species through loosening and addition of amendments that promote water absorption and release. Remove large rocks, debris, or large clumps, then seed in two directions to distribute seed evenly over entire area. Drill seed all indicated areas as soon as possible
after completion of grading operations.
9. If changes are to be made to seed mix based on site conditions, undesirable weed content in lots, or lack of availability of certain species, then approval must be provided by city environmental planner prior to ordering seed mixes. Any ordered seed mixes that do not meet design intent will be rejected at the owner's or
contractor's expense.
10. Appropriate native seeding equipment will be used (standard turf seeding equipment or agriculture equipment shall NOT be used). Broadcast seeding is allowed
11. Drill seed application recommended per specified application rate to no more than ¼ inch depth. The seed quantities in seed mixes assume broadcast seeding. If drill seeding is used, seeding quantities can be reduced by 50%. Refer to native seed mix table for species, percentages and application rates.
12. Rake in seeds to ensure seed to soil contact.
13. See the prepared Weed Management Plan in the Adaptive Management Plan to ensure that weeds are properly managed before, during, and after seeding activities. Do not use chemical herbicides or pesticides in pollinator resource areas.
14. After seeding the area shall be covered with crimped straw, wood straw, erosion control blanket, or other appropriate materials as indicated in the plan set. Plastic-based erosion control materials (i.e., Plastic-welded blankets) shall not be used without express permission from the environmental planner as these materials
have proven to cause wildlife entrapment issues.
15. Where needed, temporary irrigation shall be provided until seed is germinated. Generally speaking, after germination, irrigation can be reduced by 50% for the next month, and then reduced by another 50% for the following month, until the desired level of vegetation establishment is reached. Note that proper irrigation
schedule will vary depending on the nature of natural precipitation regime. Confer with experienced local restoration ecologist or client's desired responsible contractor to determine appropriate irrigation schedule.
16. Temporary irrigation will be used for no more than 2 years, and will be removed at least one growing season prior to measurement of the success criteria.
17. If irrigation is used, the irrigation system for seeded areas shall be fully operational at the time of seeding and shall ensure 100% head-to-head coverage over all seeded areas. All methods and requirements in the approved irrigation plan shall be followed.
18. Contractor shall monitor seeded area for proper irrigation, erosion control, germination, and reseeding as needed to establish cover.
19. The approved native seed mix area is intended to be maintained in a natural like landscape aesthetic. Do not mow during hot, dry periods. If and when mowing occurs in native seed areas, do not mow lower than 12 to 18 inches in height to avoid inhibiting native plant growth. Native seed should be mowed at most twice a
year, but typically only once in the fall after seed has hardened. Mowing shall not inhibit seed production. Do not trim perennials or grasses earlier than mid-April.
20.In the Raingarden/Pollinator Garden areas, leave small bunches of cut stems within pollinator beds after trimming. Stems to be placed in the back of planting bed or dispersed in between plantings. Leave any fallen leaves within pollinator beds through the next growing season. Collected leaves can also be placed in small
piles in designated open space to provide additional over-wintering habitat.
21. Native seed areas outside of the NHBZ will be considered established when seventy percent of pre-site development vegetative cover is reached with less than ten percent of cover consisting of noxious weeds, no bare spots larger than one foot square, and/or until deemed established by city planning services and erosion
control.
22. NHBZ-specific revegetation success criteria to be considered established include meeting the reference area cover standard, less than five percent noxious weeds, eighty percent survival of woody species, no significant bare spots, and/or deemed acceptable by Environmental Planning
23. The developer and/or landscape contractor is responsible for adequate seedling coverage and growth at the time of final stabilization, as defined by state and local agencies. If final stabilization is not achieved to the satisfaction of the agency, the developer and/or landscape contractor shall be responsible for additional
corrective measures to satisfy final vegetative requirements for closeout.
24. Proper labeling for each bale or lot of mulch used is required. Project manager has the right to inspect and reject bales if they are suspected to contain unacceptable weed contents. Specifically, smooth brome (Bromus inermis), cheatgrass (Bromus tectorum), Canada thistle (Cirsium arvensis), fireweed (Kochia scoparia), and
other aggressive exotic plant species shall not be present in mulches used for the project. A restoration ecologist or botanist should be consulted when reviewing the weed-free mulch product. A list of potential weeds present in the mulch and the product information shall be provided to the project manager and project designer
for review and approval prior to use. Hay, regardless of the source, shall not be used as a mulch.
03/24/2025
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o.--1 ___ 1�.--0 ___ 2�.--0 ______ 3�oft LEGEND
Piezometer 1
May GW = 5106.8'
June GW = 5106.8'
July GW = 5106 .8'
Sept.GW = 5107.3'
NHBZ -Phase 1 f----+----ll-+--___.
MW-1 (AloTerra)
May GW = 5102.15'
June GW = 5101.39'
Aug.GW = 5101 .71'
NHBZ-Phas
Piezometer 6
MayGW=5113.7'
June GW = 5113 .7'
July GW = 5114.2 '
Aug.GW = 5113 .6 '
Sept.GW = 5113.2 '
MW-2 (AloTerra)
MayGW = 5116.07'
June GW = 5115.29'
Aug.GW = 5114.65'
TH-3 (AloTerra)
May GW = 5114.05'
Aug GW = 5116.55'
*water pooling in nearby
wetland
•
' ' ' ' •"'1fllr "...,._, •• ,_,,_,."'-fl-"-=• • ...,._,. "'r-'" .,.,,_. ·=· .:..:• . ...,._,.•c.:..,• L........j
TH-1
Piezometer 2
--------
May GW = 5096.3'
����• June GW = 5095.3'
July GW = 5095.8'
Sept.GW = 5095.8'
z _. w CJ)
----------
0 D Existing Wetland 50' Buffer
,______, � Impacts Within 50' Buffer
Temporary Impacts D Wetland Boundary
:---1 � Wetland Boundary -Impact m�������� • Exploratory Boring
.-----'---------"----""i' Piezometer 3
May GW = 5095.0'
June GW = 5093 .5'
July GW = 5095.5'
Sept.GW = 5095.0'
JAERGERCT
•Temporary PiezometerD Saddle Ridge Natural Area D Property Boundaries
•• • • • Project Boundary-----Right of WayD NHBZ Boundary
-----Pleasant Valley Canal Toe of Bank
-Pleasant Valley Canal Top of Bank
-JR Engineering Linework -Infrastructure
0 c:::
f------------1 � u 0 c:::
Natural Habitat Buffer Zone
Feature Acres
50' Natural Habitat Buffer Zone (Required per city code) 1.64
Proposed Natural Habitat Buffer Zone (Designed)1. 73��11:f:r������t����9t== ¼---1-----------------------+--------1 � c��=�;�;�1::::::j��,�1�1,�lil�-Proposed NHBZ -Phase 1 (northern portion) 0.68
Piezometer 4
May GW = 5102.9'
June GW = 5102.4'
July GW = 5102.9'
Sept.GW = 5102.4'
Piezometer 5
May GW = 5109.0' �;;;...1..-----l June GW = 5109.0'
July GW = 5109.5'
,._,___... o "'-------l Aug GW = 5107.7' :aa Sept.GW = 5109.5'
-.. -----... "'----------·-... • ----
Proposed NHBZ -Phase 2 (southern portion) 1.05
Wetland Disturbance and Mitigation
Feature Acres
Total existing wetland and 50' buffer (Needed wetland} 0.464
Existing wetland 0.061
50' buffer around existing wetland 0.404
Total permanent wetland impacts (direct and buffer} 0.298
Direct impacts to existing wetland 0.032
Ima pacts within 50' buffer 0.266
Temporary weland impacts (for mitigation) 0.169
Proposed Wetland Mitigation (Designed wetland) 0.54
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ci::: 0
0 UJ c:: cf UJ c:: a.
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EPSG: 2231 NAD83
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Piezometer 1
May GW = 5106.8' June GW = 5106.8' July GW = 5106.8' Sept.GW = 510 7.3'
---------------------------
Wetland 3 (North)
Feature Elevation ft.asl
,___,Hydrologic Point of Reference 5114.00
Emergent (-0.25 to 0.25') 5113.75-5114.25
Mesic Meadow (0.25 to 0.75') 5114.25 -5114.75
Facultative (0 .75 to 1.75') 5114.75 -5115.75
Piezometer 6
MayGW=5113.7' June GW = 5113.7' July GW = 5114.2' Aug.GW = 5113.6' Sept.GW = 5113.2'
MW-2 (Al oTerra)
MayGW = 5116.07' June GW = 5115.29' Aug.GW = 5114.6 5'
TH-3 (Al oTerra)
May GW = 5114.05' Aug GW = 5116.55' *water pooling in nearbywetland
0 100 200 300 ft -----------------------------· .... I -----,1.--------.1.....-------.1 LEGEND
•
•
' '' ' 0
• "'tff-'"'-"--" ·=·..e...i· �-.:..,• -'-'r'--=-=--..::...,--=-=----=...,-c......_j z _. w CJ)
=--Emergent DATE:
TH-1
------------------
,___--------i Mesic Meadow
Facultative
� Ra ingarden
Shade Tolerant �������□ Upland
,---'-------'----""i'
•Exploratory Boring
•Tempo rary PiezometerD Saddle Ridge Natural Area D Property Boundaries
-----Project Boundary
-----Right of Way D NHBZ Boundary
Piezometer 3
May GW = 5095.0' June GW = 5093 .5' July GW = 5095.5' Sept.GW = 5095.0'
-----Pleasant Valley Canal Toe of Bank
Piezometer 2 -Pleasant Valley Canal Top of Bank
May GW = 5096.3' ���-• June GW = 5095.3' July GW = 5095.8'
-JR Engineering Linework -Infrastructure
Sept.GW = 5095.8'
Wetland 2 (Middle)
Feature Elevation ft.asl
Hydrologic Point of Reference 5115.25
Emergent (-0.25 to 0.0') 5115.00 -5115.25
Mesic Meadow (0.0 to 0.50') 5115.25 -5115.75
Facultative (0.50 to 1.25') 5115.75-5116.50
5116.50 +
0
Piezometer 5
May GW = 5109.0' �;;;,J.. _ _J June GW = 5109.0'
JAERGERCT
WPLUMST
;;,;;;: s::: OJ )> r r
::0 0
0 c:::
f---------, � u 0 c:::
WPLUMST
0 c:::
July GW = 5109.5'
'--L../ o "'------l Aug GW = 510 7.7'
� �Wl.l.l-----��-......;;;;.........1.... __ ..J.... ____ ....t;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;.-----j u
.... _ ---------------------------
:aa Sept.GW = 5109.5'Wetland 1 (South)
Feature
Hydrologic Point of Reference
Emergent (0 .0 to 0.50')
Cl ---------------•• Mesic Meadow 0.50 to1 .25'------
Facultat ive (1.25 to 2.00')
U land 2.00' +
Elevation ft.asl
5115.75
5115.75-5116.25
5116.25-511 7.00
5117.00 -5117.75
5117.75 +
0 c:::
....___ __ _J ci:::WPLUMST
0 UJ c:: �----'cf UJ c:: a.
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f-------' 0UJ c:: cf UJ c:: a.
EPSG: 2231 NAD83
Colorado North
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NHBZ -Phase 1 f-----+-----;J1-+------
NHBZ -Phase 2 f-----------+t+-.
"
"Raingarden A" - Refer to
specifications on E9
No wetland gr ading shall occur within
within 5' of tree tr unks
.. .. .. - ..
"Raingarden B" -Refer to
specifications on E9
"Raingarden C" -Refer to
specifications on E9
., ..
O "'------__, � o��
-
--.......... .. ---.. .. -. ------...... .. ---..
LEGEND
D Saddle Ridge Natural Area
D Property Boundaries
+Upland Shade Tolerant Woody Containers
•Facultative Tree/Shrub Container
•Woody Cutting
-= = Emergent Containers
Mesic Meadow Containers
Facultative Seed and Containers
Upland -Shade Tolerant Seed
DATE:
�---+------+--�=-t D Upland Seed
WPLUMST
� Raingarden Seed
•Emergent / Mesic Seed
-----Project Boundary
-----Right of Way
_______,, D NHBZ Boundary
-----Pleasant Valley and Lake Canal Toe of Bank
JAERGER -Pleasant Valley and Lake Canal Top of Bank
-JR Engineering Linework-Infrastruc ture----
r :::a0
:,:;:
� ca )> rr:::a0
0 100 200ft -1 ------1-----1
WPLUMST
Refer to soil ammendment
specifications on page E9.
0 a:::
0 a:::
WPLUMST
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EPSG: 2231 NAD83
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LEGEND
0
i------------1---� � � Agricultural Straw OR Wood Straw
� I):�'� Erosion Control Blanket (CC4)
::?! D Sa ddl e Rid ge Natural Area
� D Property Bounda ries
DATE:
________ __[__ ___ ____, · · -· -Project Boundary---------------Right of Way
D NHBZ Bounda ry
-JR Engineering Linework -Infrastructure
0 100 200 300 ft -1 ----1----1----1
0 c:::
JAERGERCT
f------------1 � u 0 c:::
Soil Surface Protection Notes
-Mulch must be abl e to with stand windspeeds up to 60 mph
and remain in place
-Agricultural straw or wood straw shall be used for sur face
mulch on all seeded and planted areas with slopes less steep
1-----1 than 3H:1V.
-Agricultural straw must be spread at 2,500 lbs/ AC,crimped,
and tackified with gua r gum at a rate of 60 lbs/ AC.
-Wood straw shall be spread at a 60% coverage rate
-CC4 Erosion Control Blanke t shall be used for sur face
protection on all se eded and planted areas with slopes steeper
than 3H:1V.
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-Th e placem ent of sur face protection over seeded areas shall �
occur a maximum of 96 hour s after seeding. Each sh rub or tree � ifplanting shall be treated with mulch accoriding to typical � a.
_____ ........-----------...... • details. Mulch shall be kept 1 - 2 inch es away from stem s of --EP_s_G:-22-31_N_Ao_s_3 _
shrubs and trees. Herbaceous plants shall not be mulched, Colorado North ----
f------l except wh ere indicated on th e plan set.
-Certified weed free mulch shall be used in all situations.SHEET NO.:
95% Design
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,-----------------------.--�-----,----,,.--------: ' ____ ------s:-,----------,------,-------,--------rr-----,�-=--=-====�,--------,---------,------------;:::========================;::::::::r-----�
--------------------------------------------------------·
NH BZ -Phase 1 1-----9=-. --+--fi--+--.-
NHBZ-Phase
•
'''' --------------------
--------
z _.
LEGEND a Smooth Brome Treatment w CJ) i-----___, 0 Rus sian Oliv e Remo val and Replacement
----------
e Crack Willow Remo val and Replacement
Tree -Pres erve in Plac e
Iii As Nee ded Smothered and Degr aded Smooth Brome Piles
D Property Bou ndaries
-----Pleasant Valley and Lake Canal Toe of Bank
-Pleasant Valley and Lake Canal Top of Bank
••••• Project Bou ndary
••••• Right of Way
D NHBZ BOUNDARY
-JR Engineering Linework-Infr astr ucture
D Saddle Ridge Natur al Area
JAERGERCT
0 100 200 300 ft -1 ----1----1 ----1
0c:::
f------------1 � u 0 c:::
Smooth Brome Treatment
1------,----------j 1)Outside of tree driplines,sod is to be excavated to a
minimum depth of 6 inches and a maximum depth of 8
inches.Excavated sod is to be stored in the designated
fill locations for wetland excavation.If additional space is
needed,excavated smooth brome sod is to be piled in
¼-------I w p the "As Needed Smothered and Degraded Smooth
Brome Piles." For more infor mation on the "As Needed
Smothered and Degr aded Smooth Brome Piles," see
the notes section on sheet E1 .
2)There is to be no excavation of sod within 6 inches of
tree driplines.Within tree driplines,smooth brome is to be
1---�---1 co vered with cardboard,and a minimum of 6 inches and
a maximum of 8 inches of excavated sod,root-side up,is
to be placed on top of the cardboard.Smooth brome is to
remain cov ered for at least 5 months and until
revegetation is ready to occur.
DATE:
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:aa Tree Replacement tE 0 UJ 1)Noxious trees should be treated via her bicide � .... _ ----. . . . . .-.. --.. .... .. .. -. . .� I I
�--···.@···�@__ 9 ... ___ _
t---.L.....,------
injec tion prior to removal to reduce her bicide usage and � --------1 prevent re-sprouts. EPSG: 2231 NADB3
2)All trees must be replac ed with native tree species at __ c_olo_ra_do _N_ort_h_---1
a 2:1 ratio or greater following the layout in sheet E5,and
--------1species in sheet E10. SHEET NO.:
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T
h
u
r
s
d
a
y
,
J
u
n
e
2
0
,
2
0
2
4
1
2
:
2
4
:
4
6
A
M
1" = 61'
1" = 123'
SCALE (34"X22"):
SCALE (17"X11"):
SCALE IN FEET
0
SHEET NUMBER
OF
DATE:
DR
A
W
N
B
Y
:
CH
E
C
K
E
D
B
Y
:
AP
P
R
O
V
E
D
B
Y
:
E11E8
06/20/2024
WE
T
L
A
N
D
G
R
A
D
I
N
G
P
L
A
N
(S
u
p
p
l
e
m
e
n
t
a
l
t
o
J
R
E
n
g
i
n
e
e
r
i
n
g
)
Po
l
e
s
t
a
r
D
e
v
e
l
o
p
m
e
n
t
95
%
C
o
n
s
t
r
u
c
t
i
o
n
D
r
a
w
i
n
g
s
Fo
r
t
C
o
l
l
i
n
s
,
C
O
XX
X
XX
XX
----------------
----------------
----------------
AP
P
R
V
DE
S
C
R
I
P
T
I
O
N
RE
V
REVIEW SET
NOT FOR
CONSTRUCTION
DATE:
SHEET NO.:
Po
l
e
S
t
a
r
C
o
m
m
u
n
i
t
y
,
F
o
r
t
C
o
l
l
i
n
s
,
C
O
PR
E
P
A
R
E
D
F
O
R
:
PR
E
P
A
R
E
D
B
Y
:
Seed mixes, acreages, and percent mix are
subject to minor adjustments based on vendor
availability and updated data from piezometer
readings throughout the growing season.
E9
Se
e
d
M
i
x
e
s
95% Design
03/24/2025
DATE:
SHEET NO.:
Po
l
e
S
t
a
r
C
o
m
m
u
n
i
t
y
,
F
o
r
t
C
o
l
l
i
n
s
,
C
O
PR
E
P
A
R
E
D
F
O
R
:
PR
E
P
A
R
E
D
B
Y
:
E10
Pl
a
n
t
P
a
l
e
t
t
e
95% Design
03/24/2025
DATE:
SHEET NO.:
Po
l
e
S
t
a
r
C
o
m
m
u
n
i
t
y
,
F
o
r
t
C
o
l
l
i
n
s
,
C
O
PR
E
P
A
R
E
D
F
O
R
:
PR
E
P
A
R
E
D
B
Y
:
SHRUB PLANTING
CROSS SECTION NOT TO SCALE
25 - 50% Deeper than rootball
2x Rootball
diameter
NOTES:
1.Broken or crumbling rootballs will be
rejected.
2.
3.
4.
5.
6.
7.
Care should be taken not to damage the
shrub or rootball when removing it from
its container.
Backf ll around rootball with soil that
does not exceed specif cations in
restoration notes.
Excavate planting pit 2x the diameter fo
the rootball and 25-50% deeper than
height of rootball.
Add backf ll around rootball in 2” layers,
watering each layer before applying the
next of soil.
Add 2” of mulch to cover 18” of the
ground/dripline, leaving 1” open around
trunk of shrub.
Use part of the excavated soil to build an
irrigation berm at the edge of dripline,
about 1-2” high and 3-4” wide. Import
soil as needed from nearby harvest sites.
2x depth of mulch
Irrigation berm
Undisturbed soil
Amended backf ll
Container shrub
E11
Ty
p
i
c
a
l
s
95% Design
03/24/2025