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Urban Drainage & Flood Control District is proposing stream stabilization on a segment of Cherry Creek located between South Quebec Street and Iliff Drive.
PUBLIC NOTICE
US Army Corps
of Engineers
Omaha District
REPLY TO:
Denver Regulatory Office
9307 South Wadsworth Blvd
Littleton, CO 80128-6901
FAX (303) 979-0602
Application No: NWO-2018-00533-DEN
Project: Cherry Creek Stream Stabilization
(Quebec to Iliff)
Applicant: Urban Drainage and Flood Control District
Waterway: Cherry Creek
Issue Date: November 21, 2018
Expiration Date: December 21, 2018
30 DAY NOTICE
PUBLIC NOTICE
FOR SECTION 404 PERMIT APPLICATION SUBMITTED TO
U.S. ARMY CORPS OF ENGINEERS
The District Engineer, U.S. Army Engineer District, Omaha, Nebraska is evaluating a Department
of the Army permit application from Mr. Ken MacKenzie, Urban Drainage and Flood Control District
(UDFCD), 2480 West 26th Avenue, Suite 156-B. Permits are issued under Section 404 of the Clean Water
Act (Section 404) which regulates the discharge of dredged or fill material into waters of the United States.
Summary
The UDFCD proposes stream stabilization to a segment of Cherry Creek, located between South
Quebec Street and Iliff Drive.
Location
The project area is located at approximately 39.681040°N, -104.897490°W, within the Cherry
Creek corridor between South Quebec Street and Iliff Drive, downstream from Cherry Creek Reservoir.
The project area is located approximately 3 miles north of the Cherry Creek dam and Cherry Creek State
Park, 7 miles south of downtown Denver, and 2.5 miles east of Interstate 25. The project area is in
Sections 21 and 28, Township 4 South, Range 67 West of the 6th Principal Meridian in the City and
County of Denver, Colorado.
Description of Work
The UDFCD would stabilize this reach of Cherry Creek through the implementation of a range of
stream stabilization methods. UDFCD would excavate approximately 150,000 cubic yards of the existing
Cherry Creek corridor and realign the existing Cherry Creek channel to mimic bankfull and sinuosity
1
Project: Cherry Creek Stream Stabilization Project
Waterway: Cherry Creek
Corps File No: NWO-2018-00533-DEN
Applicant: Urban Drainage and Flood Control District
characteristics found in upstream reference reaches. UDFCD would construct 17 riffle/pool structures
and 3 sculpted concrete grade control structures to support a new channel slope. Floodplain benches
would be created adjacent to the active channel to create a wider channel cross-section which would allow
high flows to spread and expand. Approximately 10,000 linear feet of hard and soft bank stabilization
would occur to stabilize the channel once realignment is complete. UDFCD would revegetate wetland,
riparian and upland areas within this reach with native trees, shrubs and herbaceous vegetation.
Purpose
The basic project purpose is stream stabilization. The overall project purpose is to improve flow
conveyance and stability of Cherry Creek between South Quebec Street and Iliff Drive.
Impacts and Mitigation
The total length of impacts to Cherry Creek is approximately 5480 linear feet (3.26 acres). The
total impacts to wetlands is 0.53 acres. The Applicant has proposed to provide on-site, permittee
responsible mitigation for impacts to open waters and wetlands.
*********************
The Colorado Department of Public Health and Environment, WQCD-GWPS-B2, 4300 Cherry
Creek Drive South, Denver, Colorado 80222-1530, will review the proposed project for state certification in
accordance with the provisions of Section 401 of the Clean Water Act. The certification, if issued, will
express the State's opinion that the operations undertaken by the applicant will not result in a violation of
applicable water quality standards. For further information, please contact the Colorado Water Quality
Control Division, (303) 692-3500.
In compliance with the Endangered Species Act, a preliminary determination has been made that
the described work will not adversely affect species designated as threatened or endangered or adversely
affect critical habitat. In order to complete our evaluation of this activity, comments are solicited from the
U.S. Fish and Wildlife Service and other interested agencies and individuals.
The Corps of Engineers, Omaha District will comply with the National Historic Preservation Act
of 1966, and amendments and the procedures set forth in 33 CFR 325, Appendix C. We will evaluate input
by the State Historic Preservation Office, Tribes, and the public in response to this public notice, and we
may conduct or require a survey of the permit area to check for unknown historic or prehistoric properties, if
warranted.
The decision whether to issue a permit will be based on an evaluation of the probable impacts
including cumulative impacts of the proposed activity on the public interest. That decision will reflect the
national concern for both protection and utilization of important resources. The benefits which reasonably
may be expected to accrue from the proposal must be balanced against the reasonably foreseeable
detriments. All factors which may be relevant to the proposal will be considered including the cumulative
effects thereof; among those are conservation, economics, aesthetics, wetlands, fish and wildlife values,
flood hazards, floodplain values, land use, navigation, shoreline erosion and accretion, recreation, water
supply and conservation, energy needs, safety, food and fiber production, mineral needs, considerations of
property ownership and, in general, the needs and welfare of the people. In addition, the evaluation of the
impact of the work on the public interest will include application of the guidelines promulgated by the
Administrator, Environmental Protection Agency, under authority of Section 404(b) of the Clean Water Act
(40 C.F.R. Part 230).
The Corps of Engineers is soliciting written comments from the public; Federal, state and local
2
Project: Cherry Creek Stream Stabilization Project
Waterway: Cherry Creek
Corps File No: NWO-2018-00533-DEN
Applicant: Urban Drainage and Flood Control District
agencies and officials; Indian Tribes; and other interested parties in order to consider and evaluate the
impacts of this proposed activity. Any comments received will be considered by the Corps of Engineers to
determine whether to issue, modify, condition or deny a permit for this proposal. To make this decision,
comments are used to assess impacts on endangered species, historic properties, water quality, general
environmental effects, and other public interest factors listed above. Comments are used in the preparation
of an Environmental Assessment and/or an Environmental Impact Statement pursuant to the National
Environmental Policy Act. Comments are also used to determine the need for a public hearing and to
determine the overall public interest of the proposed activity.
Comments, both favorable and unfavorable, will be accepted, made a part of the record and will
receive full consideration in subsequent actions on this application. Any agency or individual having an
objection to the work should identify it as an objection with clear and specific reasons. All replies to the
public notice should be sent to the U. S. Army Corps of Engineers, Denver Regulatory Office, 9307
South Wadsworth Blvd, Littleton, Colorado 80128-6901. For additional information please contact
Aaron R. Eilers, Regulatory Project Manager, at (303) 979-4120 or aaron.r.eilers@usace.army.mil or
visit the Denver Regulatory Office web site at:
http://www.nwo.usace.army.mil/Missions/RegulatoryProgram/Colorado/PublicNotices.aspx
The District Engineer will consider requests for holding a public hearing, for the purpose of
gathering additional information. Before the expiration date of this notice, anyone may request, in writing,
that a public hearing be held. Requests for a public hearing should state specifically the reasons for holding
a public hearing, and what additional information would be obtained. Should the District Engineer decide
that additional information is required and a public hearing should be held, interested parties will be notified
of the date, time and location.
Comments received after the close of business on the expiration date of this public notice will
not be considered.
3
Project: Cherry Creek Stream Stabilization Project
Waterway: Cherry Creek
Corps File No: NWO-2018-00533-DEN
Applicant: Urban Drainage and Flood Control District
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Legend
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Study Area
FIGURE 1
REGIONAL MAP
0 0.25 0.5
1 Mile
I
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CORVUS
CHERRY CREEK
QUEBEC TO ILIFF
Denver, Denver and Arapahoe Counties
Mao Date: 10/24/2017
Legend
0
410
820
1,640 Feet
Photo Points
- - Streams*
CJ Study Area
FIGURE 2
STUDY AREA
Flow Direction (NW)
CJ Counties
*Streams data from CO state or COOT
and are a roximate
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t ~
· . .,- .,n11 ._ ,,i,;· r ;i; u·.
CHERRY CREEK
QUEBEC TO ILIFF
Denver, Denver and Arapahoe Counties
Mao Date: 10/24/2017
Legend
·
0
162.5
325
'
'I
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Sample Points
-
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-
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~
650 Feet
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FIGURE 3
~,
WETLANDS
AND OPEN WATERS
CORVUS
[ 1'1 , .-.fl,..,.rl'l(~'bV' r.ll!l L(
Flow Direction
CHERRY CREEK
QUEBEC TO ILIFF
Denver, Denver and Arapahoe Counties
Mao Date: 10/5/2018
Legend
·
0
162.5
325
Sample Points
-
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-
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~
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FIGURE 3
~,
WETLANDS
AND OPEN WATERS
CORVUS
( tT, n_n'""'l rt:41 (< ·1H1 '. r 1.U L
Flow Direction
CHERRY CREEK
QUEBEC TO ILIFF
Denver, Denver and Arapahoe Counties
Ma Date: 10/5/2018
CONTRACT DRAWINGS FOR THE CONSTRUCTION OF:
CHERRY CREEK CORRIDOR IMPROVEMENTS
QUEBEC TO ILIFF
DENVER PROJECT NUMBER: 2018-PROJMSTR-0000023
SEMSWA PROJECT NUMBER: CPR16-00005
APRIL2018
INDEX OF DRAWINGS
SHEET
NO.
GENERAL
URBAN DRAINAGE AND
R.OOD COKTROL DISTRICT
DRAWING
NO.
SHEET TITLE
x
G-1
TTTlESHEET
G-2
G-3
SCTEPIAN
x
GEfrEW. NOTES ANO LEGEND
CIVIL
C-IStoc-8
OEMO AND REMOVAL PLANS
GRADING Pt.ANS
x
8tD11
12to 13
C-9toC-10
CHANNEL PROFILE
14to 19
C-11 toC-13
17
C.14
18
C.15
CROSS SECTIONS
TYPICAL CHANNB.. SECTIONS
DOWNSTREAM TIE IN DROP Pl.AN
DOWNSTREAM TIE IN DROP SECTIONS
x
x
4to7
,.
MILES
·
0
15
10
KILOMETERS
20
15
;I! TMEllUPU"""""°"
PREPARED UNDER
C.18
C.17
21
C.18
1.a RIFFL.E DROP Pl.AN
0.15' RIFFLE DROP PLAN
22
C.10
RIFFLE DROP SECTIONS
23
C.20
SECONDARY TRAJL aIDSSING WITH 'Z
OROPPIAN
24
C.21
25
C.22
281D27
C-23toC-24
28
C.25
28to30
C-28toC-'Zl
31
C-28
32
C.29
33
C®
341<>"'
C-31 toC-36
"40to41
C-371DC-38
42
"""'
SECONDARY TRAIL ~ING WITH 2.5'
DROPPIAN
SECONDARY TRAIL CROSSING wrTH
DROP SECTIONS
SECONDARY TRAIL CROSSING DETAILS
DROP STRUCTURE DETAILS
BANK PROTECTION DETAILS
TRJBUTARYREPAIRCETAILS
IUFF AVE. WATER QUAL!TYTREATMENT
PLAN AND DETAILS
ILIFF AVE. WATER QUALITY TREATMENT
STRUCTURAL DETAILING
STORM SEWER MODIFICATION Pl.ANAND
PROFlLES
49
L·7
001<>53
L-BtoL-11
M.,57
L-13tal-15
.
L·12
EROSION CONTROL
EC.1
68
..
MISCELLANEOUS DETAILS
EC-2
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SECTION
Pl..ANT\NG Pl.ANS
PL.ANT1NG SCHEDULE
PLANTING DETAILS
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
TTTlESHEEr
GENERAL NOTES
EC-3
SITE PLAN
81 tD72
EC-'tcEC-15
EC PLANS
73"'78
EC-1StoEC-10
EC DETAILS
80
x
STORM SEWER DETAILS
LANDSCAPE PLANS - STREAM DESIGN
L-1 tol.....
43to46
TRA!LAND AMENITY PLANS
47to48
L..Stol-9
TRl>JLANO AMENllY OETAJLS
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19
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PROJECT NO. 13-003.04
DATE
DRA.W!NO NO
SHEET NO
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llTP18
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sow
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MAB
MDC
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60% SUBMITTAL
DEMO AND REMOVAL PLANS
PROJECT NO. 13-003.04
SHEET NO.
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LIMIT OF CONSTRUCTION
EXISTING WETLANDS
0TP 18
PREPARED UNDER
TM ESUPERV1SION OF
- _
URBAN FILL TEST PIT
LOCATIONS
NO~ES WITHIN LIMITS OF
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SO% SUBMITTAL
Q1ECKED:
MDC
PROJECT NO. 13-003.04
---
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RlPRAP RUNDOWN
EXISTING GROUTED BOULDE
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AREA OF HISTORICAL URBAN FILL CONTAINING DEBRIS
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·HISTORICAL URBAN FILL INVESTIGATIOW REPORT BY
PINYON ENVIRONtlENTAL FOR MORE DETAIL REMOVE
HAZARDOUS MATERIAL ANO BURY SUITABLE DEBRIS IN
ACCORDANCE WITH THE MATERJALS MANAGEMENT PLAN.
NOTE:
ALL TREES WITHIN LIMITS OF
CONSTRUCTION TO BE REMOVED
UNLESS OTHERWISE NOTED.
LIMIT OF CONSTRUCTION
EXISTING TREE
EXISTING WETlANOS
CONCRETE REMOVAL
eTP18
URBAN FILL TEST PIT
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CHERRY CREEK CORRIDOR IMPROVEMENTS
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5410
9+00
10+00
11 +00
12+00
13+00
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CHERRY CREEK CHANNEL PROFILE
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SCALE: 1· = 100' (HORlZ.)
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=
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5420
STOR
5415
5410
5405
_____ J_____ , ___ __ 1 ____ _
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5400
5395
5390
26+00
CHERRY CREEK CHANNEL PROFILE
HYDRAULIC INFORMATION:
a ,c =1608CFS
QBIOFLUSt<=1300CFS
C100 = 5000 CFS
CSMA.LL FLUSH = 300 CFS
(STA. 14+00 TO 28+00)
=
SCALE: 1" 100' (HORIZ.}
1" = 10' (VERT.)
27+00
28+00
I
P~OPOSED
I
5425
28+00
29+00
30+00
31+00
32+00
33+00
35+00
34+00
36+00
37+00
J RADE FROIM
I
,,.- 2Q11 CHERRY CREEK
/
38+00
StABJUZATlGN PLAN
39+00
40+00
I 5425
42+00
41+00
CHERRY CREEK CHANNEL PROFILE
(STA. 28+00 TO 42+00)
SCALE:
5435
r = 100' (HOR!Z.)
1" = 10' (VERT.)
I
5435
5430
-----1
I
5425
I
5420
5410
I
~,
"
I
! -54
_ 05_ ! -_ __-:-__"..,_ ·");/~- -
-----~----
___ __t _______ ____
-----------~+~~~~:~:+.-~,~=---+---_--_-+l-_-_-_--~~~-J--+-~---~'-'~-~'--_-_·~---_-_·-~--J~l ~~~~~~~~1~~~~~--~
"J'°''' O !nA.~c~)
I
48+00
49+00
J~~~~
5400
5400
42+00
HYDRAULIC INFORMATION:
O,o - 1608 CFS
Oeic HUSH
0 100 = 5000 CFS
43+00
= 1300 CFS
= 300 CFS
Q SMALL FLUSH
44+00
45+00
46+00
47+00
50+00
CHERRY CREEK CHANNEL PROFILE
(STA. 42+ 00 TO 56+00)
SCALE : 1" = 100' (HORIZ.)
1":: 10' (VERT.)
51+00
52+00
53+00
54+00
55+00
56+00
,I
~'g'~
rl-1 r-r,
-~
I
- r --
5420
100.v;uw
i---+-------i-------t-------- - - - t,=
._YRWATE
c=±-R
SURFACE
5400
I
I
.......... -
~--;- i -~;r- , -~- .·ci=,, _=__+
_ sr:
.·L PiRTIARY-t.L---t~
-IRAJ'--+'-----+--=-=---1
5400
PRIMARY TRAIL
l
!
UNci.AsslFIED
~
r----~---t---t----EM-s:,:
_
536_0~--~--~--~---l
1BO
5420
160
1~
120
100
BO
BO
~
0
~
----- ~~~
~
~
EXCA ATION
~--~--1 53_!0
0
BO
60
l - - - ' - 1- -~
--1
___
1~
100
140
160
CROSS SECTION (STA. 5+65.12!;1:\,
6d
...I
5420
5420
5400
5400
5380
120
100
BO
~
~
0
~
~
CROSS SECTION (STA. 10+79.en/'S\.
BO
"'
100
BO
60
120
140
...
~
5440
JJ:::_____~20
~
I
5420
~
5400
I CONC~
~I
I
I'
53BO
1BO
I
l
~
5400
I TRAIL
160
140
120
100
BO
60
~
~
0
~
~
BO
CROSS SECTION (STA.17+53.08!&
"'
HYDRAULIC INFORMATION:
0, 0 "' 1608 CFS
C\ua FwaH · 1300 CFS
0,oo a 5000 CFS
uSH = 300 CFS
r//J MULLER
F"RE.PARED UNDER
~i ,,,,.,,.,.,,,.,.OF
1~
sow
MAB
603 susMirrAL
Moc
PROJEcr·a. 13-003.04
·
ENGINEERING CO MPANY
BO
100
120
140
200
...
m""~
t}
<;:rui:'rti~&'.&r
CHERRY CREEK CORRIDOR IMPROVEMENTS
~~
CIVIL
5) oENVERWATER
CROSSSECTIONS
ORAWINONO.
C-1'
~.~.. ~ ~~~--'-~~~~~~~~~~~SHEE>"~~~
~"'..I!~!-· .___~~...____.~---'-'==-'=-":..:='-----'---'-~.__~~~~-'----'-~~~~-ea~!"-'--~.__~~1-I_~_?._
Jl ' . ~._~._~!-"R_,·_··_···_o·_c_o"·_~_
~~-
illldlapemllilr240
220
200
180
160
140
120
100
80
60
40
20
~
0
40
60
80
100
120
140
160
180
200
220
240
260
280
300
320
CROSS SECTION (STA. 23+65.09)/S\,
...
"'
A't ~ml..
I ~;;;l:"'
---~ -~ -==---- -
I
5440
~o l~
- - - - SURFACE
1
I
I
',b
1·-~; -
· · ,,~~ · ·
1
~-r:;h -~[ :~KMENT
5400
I
I
I
-
I
JJ_
~7-
I
BANKFULL CHANNEL
··-
· 1
I
I
.- · ' ~~ --
260
240
220
200
180
160
:-----:::C -
-
~-
lRAIL
EXCAVATI
100
120
80
60
~
40
~
0
40
5380
I
I
280
260
240
220
200
180
160
I
i
140
120
...
0
~
- - 11 5420
1:~
I
60
80
120
100
140
160
5380 ~
=
~
180
CROSS SECTION (STA. 31 +17.SD)/t\,
,.
I_ _. _.,
I
I
140
5440
I
1 - 1
j\_ seJ NDARY
U~CLASSIFl~O
1··
I
' rEN)IER
WA'f.ER
L PROr·RTY
---
I I -· /t'~
r-- - :r~
!
j
I
I
5380
-280
I
240
280
260
300
I
100
80
60
40
~
40
CROSS SECTION (STA. 34+68.62)'1\.
"'
60
80
100
120
140
160
5380
180
200
220
240
260
280
I
5440
5440
5420
5420
5400
54] 0
53BO
5380
300
2BO
260
240
220
200
1BO
160
140
100
BO
60
40
CROSS SECTION !STA. 41 +51.45)
20
£
20
20
40
100
BO
120
140
160
"'
5440
5420
5400
53BO
200
1BO
160
140
120
100
~
~
~
0
~
~
40
60
BO
100
1~
120
CROSS SECTION (STA. 46+02.27)/rt\,
i
6d
5440
~
5420
I
5420
I
5400
SECONDARY
'1W
PROpqSED
GRAD
5400
53BO
53BO
140
120
100
BO
60
40
20
0
~
20
60
BO
100
120
140
160
CROSS SECTION (STA. 52+22.89)/f\.
Ni
i
DATE
HEET REVI I N
CHERRY CREEK CORRIDOR IMPROVEMENTS
4110/2018
CIVIL
C.13
FLOODPLAIN BENCH VARIES
SEE GRADING PLAN
FLOODPLAIN BENCH VARIES
SEE GRADING PLAN
44' -50'
~ffi
wlc
°'"'
BANK PROTECTION 2
SEE DETAIL, OWG. C.26
VARIES
6' T09'
BENCH VARIES
O'T03'
BENCH VARIES
3'T06'
3'
VARIES
6' T09'
GRADE TO DRAIN, SEE
GRADING PLAN (TYP.)
9"TOPSOJL
1' 0EEP
LOW-FLOW
CHANNEL
a·ToPSOIL
BANK PROTECTION 1
SEE DETAIL, OWG. C-26
20' BOlTOM WIDTH
BANKFULL CHANNEL WITH BENCH ON OUTSIDE BEND
(LOOKING DOWNSTREAM)
··
8'-0"
VARIES, 9' TO 12'
g·TOPSOlL
BANK PROTECTION 1
SEE DETAIL, OWG. C.26
BANKFULL CHANNEL WITHOUT BENCH ON OUTSIDE BEND
(LOOKING DOWNSTREAM)
'f