Mou/Moa - 1996 - Island Woods Greenbelt Pathway - 12/5/1996
July 28, 1999
Allen & Betty Frazier
1223 S. Watermark Ave.
Eagle, ID 83616
RE: ISLAND WOODS GREENBELT P A rnw A Y MEMORANDUM
Dear: Allen and Betty Frazier:
On July 22, 1999 representatives from my office, the Island Woods Homeowners Association and the City
of Eagle met with you to further clarify what work would be accomplished in conjunction with the
extension of the Island Woods greenbelt pathw'dY.
At the above stated meeting you signed the Memorandum of Agreement and executed the new greenbelt
and pathway easement with the following understanding:
B. W, Inc. will work together with the Island Woods Homeowners Association and the City of Eagle to
obtain the necessary permits to restore and stabilize the left bank of the North Channel of the Boise River,
adjacent to the subject greenbelt pathway extension. The means of stabilization and reinforcement will be
achieved by the placement of high-dcnsity txlS31t rock similar to other bank restoration adjacent to the
staled greenbelt. It is furl her understood that funding for Ihe st:lbilil.:ltion and rcstomtion project could be
accomplished by a joint effort of the Island Woods Homeowners Association, certain property owners and
the City of Eagle, subject to required authorization and agreement; based upon a fair and equitable method
of cost sharing. The timing for the restor-cllion should be accomplished between the end of October and the
end of December, subject to obtaining the necessary governmental permits.
Additionally, it is understood that you will review and approve the pathway construction plan, including the
fence relocation and landscaping modifications,
This letter is submitted to show good faith and the spirit of cooperation between all parties included within
the Memorandum of Agreement.
Sincerely,
Dennis M. Baker
President
B. W. Inc.
ce. Honorable RickYzaguirre, Mayor
cc. Honorable City Council Members
-==-"
SEPARATE PERMIT DECISIONS MUST BE
RECEIVED FROM 80TII TIlE 5T A TE OF
IDAHO AND TIlE CORPS OF ENGINEERS
PRIOR TO START OF WORK
JOINT APPUCATION fOR PfßMIT
u.s. ARMY CORPS OF ENGINEERS
IDAHO DEPARTMENT OF WATER RESOURCES
IDAHO DEPARTMENT OF LANDS
c Depll1ment of the Amfy pcnnit plO¡tam Is authorized by Section 10 oflbc Rivers and Harbors Act of 1199 and Section 404 of the Clean Water ACL These laws
;uire permits authorWnlSInlCtIIrCS and wod; In or aft'ectln¡ lIIVipble waters of the UnilCd States and the dischar¡e of dredled or fill material into walen of Ihe
.i\Cd SIaICS, ¡neludln. Ihclr adjacent wclllllda. Sua. permits - required under the Slate of Idaho, Stream Channel ProlCction Act mllc 42. Chapler 38, Idaho Code)
J lIIe Idaho 1..a ¡e ProtecLion Act. Sec:tion 58.142 eL scq, Idaho Code. This Ipplicaljon will meet the requirements of the above I,cneies.
Corps of Engineen II
2. State of Idaho II
Dale Received
Date. Received
$20 Rec'd By:
PLl:AS~ T 'PE OR PRINT
Receipt II
Applicant Islam-: ~';oods Sub division
Mailing Address Haneowners Association
PO Box 193, Eagle, ill. 83616
Work Phone ~§') 375-666!i _Home~)939-2063
Fax Number (208) 375-6667
Location where proposed acti,'ity exÍ$1S or will occur.
Waterway Nortl1 Channel - Boise River
4. Authorized Agent Ruciy .Ai1.derson/Dan Torfin
Mailing Address Same as fI..pplicant
Area
Work Phone ( )
Area
Home ( )
Tributary of:
Assessor's Desc. (Tax No. or Subdivision, Lot &: Blocl: No.)
" . "(See instrUctions)
EapJe ADA Ii) .
In/near city or town County State 1/4 1/4 Section Township Rmge
Llp8¿~I6 ~un%~tI~FcI~eor county}. UIM Coordinate Grid ZOne NOrtllUlg l:.a.Sung
Describe the proposed activity. Provide I general desaiption of the proposed work including all discharges of fill malerial and any 51nICI\I.rcS such as piers, floats,
boat lifts, bulkheads, and cofferdams.
*Repair and replace approximately 200 lineal feet of the left bank of the north Channel of
tile Boise ft;i.ver; install three deflection jetty's. See attached map and sketch. Approximately
600 cubic yards I consisd.Ilf òf 400 cu. yds. basalt rock; 200 cu. yds river cobble, from gravel b
or
air and reinforce appoximately 200 lineal feet of the left bank of the North C'nannel
ReiIDve existing concrete debris lYing within the channel, adiacent to the subiect are~
Describe construction methods and cqu!'pmcnt:
Rock and gravel will be placed by means of excavating equip¡œnt. Such equipaœnt will
. -- .
operate below the ordinary high vTater line of the subj ect waterway.
Lisl all soil series loealed at project sile, and indicate if any are on the county's hydric soils list
Sands. Gravel and River Cobble
Length of project along the su-cam or extension into lake or reservoir:
total of 400 lineal feet.
Will material be placed wat.crv."ard of ordinary hip water mark?
Yes
If yes, volume: 600 cu. yds. & 300 cu. y~u'bic yards)
(BOTH TEMPORARY AND PERMANEN1)
Will material be placed in wetlands? tìo
If yes, tolal area:
(acres)
Type and wmposition offill mat.crial:basalt rocl,-/river cobble (i.e. sand, elC.) Material Source: :imported; on-site respectively
Will excavation or dredging be required? Yes If yes, volume: 200 (cubic yards) Composition river cobble 1 gravel bar
Disposal silt for excavaled material: NI A Method of excavation:
Stream gradient:
0.30% a9pðximately
Melllod of controlling turbidity and/or sedimentation: rock will be placed by excavator
S iu and flow capacity of proposed bridge or culvert and area of drainage served (sq. miles): (Idaho Depanment of Wat.cr Resources requiremenL)
N/A
NPW 304
lDWR Fonn 3&04.B
B. Preparation of drawinp. One sel or original or g luality reproducible drawings musl be anachC4 10 Ihl$ L, ..catlon. NU I c: UKA \\ II'<LJ:I I'<U L/\K~,t:I'-
ll-IAN 8.112 X II INCHES IN SIZE. See the in$\luction pamphlet for instructions and a checklist for completing the drawinp. Ineludt photographs of the ì'
sile mounled on 8-1/2 ( I) sheets.
9. Purpose and intended use: Commercial Public X Private Other Describe:
Necessity and justification for project subject bank eroded during spring ;Of 1996
10, Proposed Slatting Dale January 2, 1997 Estimated Duration 8 days
II, If any ponion of the activit)' is complete. indicate month and year of completion
Indicate the existing work on the drawings.
N/A
12. Names, addresses, and telephone numbers ofadjoining property owners. lessees, ete.. whose propcny also adjoins the wate~'a>'.
0 Check here if the alleration is located on endowment lands administered brthc Idaho Department of Lands
13. LEGAL OWNER IF
OTIŒR TIIAN APPLICANT
Mailing Address
N/A
Phone
Arca
Work~
City, Slate,
Zip Qlde
4. List other applications, approvals, or unifications fi'om other Federal, interstate, state, or Iocalageneles for any strUCtUrts, constrUctions, dischargts. def'osill, "
other activites described in the application.
Arca
HomeL--)
)~suing Agency
None
Type of Approval
Identification No,
Date of Application
Date of Appro\'.11
IS. Has any agency denied approval for the activity described herein or for any activity directly related 10 the activity described herein? Yes - No 7~
(If .Yes. explain)
16, Remark¡ or additional infonnation:
-
17. Application is hereby made for a pennit or permits 10 authorize the activities described herein. I cenify that I am familiar with the infonnalion cont.1ined in rhi.,
application. and that to the best of my knowledge and belief. such infonnation is trUe, complele, and accurate. I further certify thaI I possess !he authority 10 "",;,-
take the proposed activities. 1 hereby grant to the agencies to which this application is made, the right to come upon the above-described location 10 insf'eci 1110
proposed or compleled work.
] 21O~/96
Dale
Signature of Applicant (ORIGINAL SIGNA11JRE REQUIRED)
19, If an authorized agent is 10 be designated, Item -4 and the following infonnation should be completed.
I hereby designate
is issued, I must sign the pennil
to act as my agent in matters related 10 this pennit application, I under3tand that if a Federal perm II
Dale Original Signature of Authorized Agent Original Signature of Applicant
18 U.S.C. Section 1001 provides thac Whoever. in any manner within the jurisdiction of any department or agency of the United States knowingly faJsifics.
conceals. or cover3 up by any uick, scheme, or device a material fact or makes any false, fictitious, or fraudulent statements or represent.atjons or makes or uses on',
false writing or document knowing same to conlain any false, fictitious, or fraudulent st.atement or entry, shall be fined not more than S 10.000 or imprisoned nOI
more than S years or both. Do not sent a Federal pennit processing fee with this application. The appropriate fee will be assessed when a pennil is issued,
DO NOT SEND FEDERAL PROCESSING FEE Wmf APPUCA nON
~PW Form 304
I¡ 94 (Rev)
IDWR Form )&(.
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State of Idaho
DEPARTMENT OF WATER RESOURCES
Western Region. 2735 Airport Way, Boise, Idaho 83705-5082 - (208) 334-2190
FAX (208) 334-2348
January 2, 1997
PHILIP E. BATT
GOVERNOR
KARL J. DREHER
DIRECTOR
Dan Torfin
% Island Woods Subdivision
Homeowners Association
P.o. Box 193
Eagle, Idaho 83616
RE:
Application for Stream Channel Alteration Permit #63-S-1215
Repair of bank and placement of three bank barbs.
Dear Mr. Torfin:
This office has reviewed the above referenced application for a
permit to alter a stream channel and has prepared a decision as
provided for in Section 42-3805, Idaho Code.
You may consider this letter as a permit for the placement of three
bank barbs, repair of 200 feet of streambank as described on your
application. However, conditions and construction procedures
approved under this permit may not coincide with the proposal as
submitted.
MINIMUM STANDARDS (These standards are established in the
stream Channel Alterations, Rules and Regulations dated November
1992, and are enclosed with this permit.)
056 - Construction Procedures
057 - Dumped Rock Riprap
.' 059 - Drop Structures, sills and Barbs
THIS PERMIT DOES NOT RELIEVE THE APPLICANT OF THE RESPONSIBILITY TO
OBTAIN A SEPARATE PERMIT FROM THE U.S. ARMY CORPS OF ENGINEERS
BEFORE STARTING THIS PROJECT. YOU SHOULD CONTACT THEIR OFFICE AT
(208) 343-0671 TO OBTAIN ADDITIONAL INFORMATION ON PERMITTING
REQUIREMENTS THAT MAY BE NEEDED FOR THIS PROJECT. A COpy OF THIS
PERMIT HAS BEEN PROVIDED TO THE CORPS FOR THEIR REVIEW.
THIS PERMIT CONSTITUTES A PERMIT FROM THE DEPARTMENT OF LANDS BUT
DOES NOT AUTHORIZE REMOVAL OF STREAMBED MATERIAL FOR SALE.
THIS AUTHORIZATION IS APPLICABLE ONLY TO DEPARTMENT OF WATER
RESOURCE PERMITS ADMINISTERED BY THE STREAM CHANNEL PROTECTION
PROGRAM. IT DOES NOT RELIEVE YOU OF THE RESPONSIBILITY TO OBTAIN
OTHER LOCAL, STATE, AND/OR FEDERAL PERMITS WHICH MAY BE REQUIRED.
- Ce/eJ,ralinq Our Centennial Year of Service to Idaho 1895-1995-
Page 2
53-5-1215
"
All construction shall be completed in accordance with descriptions
and methods on the application and attachments submitted with the
application or as addendums unless otherwise specified. Any
changes must be approved by this Department prior to commencement
of construction.
The applicant shall have the responsibility for the maintenance of
the structure(s) constructed under this permit for a period of 5
years from the date of this permit and shall assume all
responsibility to either remove, repair or modify any structure
that the IDWR determines unsuitable to the river system or that is
not functioning properly within the river.
Fill to be placed under this permit is located within the floodway
of the Boise River, and within the limits of Ada County. The
applicant shall meet all regulations governing floodway
construction, as required by your community Flood Plain Management
Ordinance, Federal Flood Insurance Program and FEMA requirements.
Failure to do so shall be cause for the community to order removal
of all or any part of fill placed in violation of any applicable
ordinance.
The use of construction equipment in the wetted channel shall be
limited to rubber tired equipment andlor a track mounted backhoe
with the provision that the track hoe shall be limited to forward
and backward movement (no turning shall be allowed except with
specific approval from the IDWR).
To enhance the stability of the streambanks and to improve the
aesthetics and fish and wildlife habitat live willow cuttings or
other suitable shrub cuttings shall be placed in the keyway
excavated in the bank in conjunction with the structure in such a
manner that one end is in contact with permanent moisture and
maximum of three or four leaf nodes are exposed.
Rock used for bank barbs and riprap shall be sound, dense, well
graded, angular rock of a sufficient size to withstand the expected
velocities within the channel during ordinary high water and be
free of fines to ensure erosion protection.
Unauthorized placement of excavated material in the stream channel
will not be permitted.
This permit specifically prohibits the removal of streambed
material from below the water surface in the flowing part of the
channel and lor pushing or pulling streambed material across the
wetted stream channel.
. .'
Page 3
63-8-1215
The gravel bar may be removed down to the existing water level in
the channel. However, during removal a minimum five (5) foot
buffer strip shall be left in its natural state along the stream
edge of the gravel bar. After completion of the gravel bar
removal, this buffer strip may be removed.
"
Upon completion of the gravel removal, the area should be graded
level or sloped so that there are no depressions which will trap
fish as river flows drop or gravel piles that will detract from the
natural appearance of the area.
All construction activities shall be conducted in such a manner as
to minimize turbidity and other water quality impacts.
Fuel, oil, and other hazardous materials shall be stored, and
equipment refueled, away from the stream to ensure that a spill
cannot enter the stream channel.
This project must be conducted in accordance with the best
management practices which are identified as "Rules and Regulations
and Minimum Standards for stream Channel Alterations" as adopted by
the Water Resource Board. Failure to do so, without specific
approval, may result in a violation of state Water Quality
Standards.
THIS PERMIT SHALL EXPIRE ON DECEMBER 31, 1997.
GENERAL CONDITIONS
c.
permit does not constitute any of the following:
An easement or right-or-way to trespass across or work upon
property belonging to others.
Other approval that may be required by State or Federal
Government, unless specifically stated in the special
cònditions above.
Responsibili ty of the Department of Water Resources for damage
to adjacent properties due to work done.
Compliance with the Federal Flood Insurance Program, FEMA
regulations or approval of the local Planning and Zoning
authority.
Idaho Code, sections 55-2201 - 55-2210 requires the applicant
and/or his contractors to contact Digline not less than three (3)
working days prior to the start of any excavation for this project.
The phone numbers for Digline are, Boise area 342-1585 and
statewide 1-800-342-1585.
This
a.
b.
d.
The permit holder or operator must have a copy of this permit at
the alteration site, available for inspection at all times.
Page 4
63-5-1215
FAILURE TO ADHERE TO CONDITIONS AS SET FORTH HEREIN CAN RESULT IN
LEGAL ACTION AS PROVIDED FOR IN SECTION 42-3809, IDAHO CODE.
If you object to the decision issuing this permit with the above
conditions, you have fifteen days in which to notify this office in
writing that you request a formal hearing on the matter. If an
objection has not been received within fifteen days, the decision
will be final.
If you have any questions, please contact me at 334-2266 extension
109 or this office.
0'
s i nc~fl~ !å--
Xe Gibson
Stream Protection Specialist
Western Regional Office
MGG:g
cc: IDOL, IDFG, IDHW-DEQ, C of E (Boise)
. .'
056.
CONSTRUCTION PROCEDURES (Rule 56).
01. Conformance to Procedures. Construction shall be
done in accordance with the following procedures unless specific
approval of other procedures has been given by the Director. When
an applicant desires to proceed in a manner different from the
following, such procedures should be described on the application.
02. Operation of Construction Equipment. No
construction equipment shall be operated below the existing water
surface without specific approval from the Director except as
follows: Fording the stream at one location only will be permitted
unless otherwise specified; however, vehicles and equipment will
not be permitted to push or pull material along the streambed below
the existing water level. Work below the water which is essential
for preparation of culvert bedding or approved footing installa-
tions shall be permitted to the extent that it does not create
unnecessary turbidity or stream channel disturbance. Frequent
fording will not be permitted in areas where extensive turbidity
will be created.
03. Temporary structures. Any temporary crossings,
bridge supports, cofferdams, or other structures that will be
needed during the period of construction shall be designed to
handle high flows that could be anticipated during the construction
period. All structures shall be completely removed from the stream
channel at the conclusion of construction and the area shall be
restored to a natural appearance.
04. Minimizing Disturbance of Area. Care shall be taken
to cause only the minimum necessary disturbance to the natural
appearance of the area. streambank vegetation shall be protected
except where its removal is absolutely necessary for completion of
the work adjacent to the stream channel.
05. Disposal of Removed Materials. Any vegetation,
debris, or other material removed during construction shall be
disposed of at some location out of the stream channel where it
cannot reenter the channel during high stream flows.
06. New Cut of Fill Slopes. All new cut or fill slopes
that will not be protected with some form of riprap shall be seeded
with grass and planted with native vegetation to prevent erosion.
07. Fill Material. All fill material shall be placed
and compacted in horizontal lifts except as provided for in Rule
55.05.e. for uncompacted dike and levee construction. Areas to be
filled shall be cleared of all vegetation, debris and other
materials that would be objectionable in the fill.
08. Limitations on Construction Period. The Director
may limit the period of construction as needed to minimize
conflicts with fish migration and spawning, recreation use, and
other uses.
.,.
057.
DUMPED ROCK RIPRAP (Rule 57).
01. Placement of Riprap. Riprap shall be placed on a
granular bedding material or a compact and stable embankment.
02. Sideslopes of Riprap. Sideslopes of riprap shall
not be steeper than 2:1 (2' horizontal to l' vertical) except at
ends of culverts and at bridge approaches where a 1~:1 sideslope is
standard.
03. Minimum Thickness of Riprap. The minimum thickness
of the riprap layer shall equal the dimension of the largest size
r iprap rock used or be 18 inches, whichever is greater. When
riprap will be placed below high water level, the thickness of the
layer shall be 50 percent greater than specified below.
04. Riprap Protection. Riprap protection must extend at
least one foot above the anticipated high water surface elevation
in the stream.
05. Rock Used for Riprap. Rock for riprap shall consist
of sound, dense, durable, angular rock fragments, resistant to
weathering and free from large quantities of soil, shale, and
organic matter. The length of a rock shall not be more than three
times its width or thickness. Rounded cobbles, boulders, and
streambed gravels are not acceptable as dumped riprap.
. .'
06. Size and Gradation of Riprap. Riprap size and
gradation are commonly determined in terms of the weight of riprap
rock. The average size of riprap rock shall be at least as large
as the maximum size rock that the stream is capable of moving. The
maximum size of riprap rock used shall be 2 to 5 times larger than
the average size.
07. Methods Used for Determining Gradation of Riprap.
There are many methods used for determining the gradation of riprap
rock. One of these many acceptable methods is shown in Table 1 and
Figure 1. A second method is the Far West States (FWS) method
shown in Table 1A in Appendix II.
"
Max. Weight of Min. and Max. Range Weight Range 75
stone Required in Weight of stones percent of stones
( lbs. ) ( lbs . ) ( lbs . )
150 25 - 150 50 - 150
200 25 - 200 50 - 200
250 25 - 250 50 - 250
400 25 - 400 100 - 400
600 25 - 600 150 - 600
800 25 - 800 200 - 800
1000 50 - 1000 250 - 1000
1300 50 - 1300 325 - 1300
1600 50 - 1600 400 - 1600
2000 75 - 2000 600 - 2000
2700 100 - 2700 800 - 2700
Table 1
Gradation of Riprap in Pounds
08. Use of Filler Material. A blanket of granular
filter material or filter fabric shall be placed between the riprap
layer and the bank in all cases where the bank is composed of
erodible material that may be washed out from between the riprap
rock. Filter material shall consist of a layer of well-graded
gravel and coarse sand at least six inches thick.
09. Toe Protection. Some suitable form of toe protec-
tion shall be provided for riprap located on erodible streambed
material.
a. various acceptable methods of providing toe
protection are shown in Figure 2 in Appendix III. (Or see "Forms,
Appendicies, Charts, Graphs, Etc..." Idaho Administrative Bulletin,
July 1, 1993, Volume 93-1, Page 37-185).
b. In addition to the approved methods of providing toe
protection as shown in Figure 2 in Appendix III (Or see "Forms,
Appendicies, Charts, Graphs, EtC..." Idaho Administrative Bulletin,
July 1, 1993, Volume 93-1, Page 37-185). any other reasonable
method will be considered by the Director during review of a
proposed project.
10. Extension of Riprap Area. Riprap shall extend far
enough upstream and downstream to reach stable areas, unless
protected against undermining at ends by the method shown in Figure
3 in Appendix IV (Or see "Forms, Appendicies, Charts, Graphs,
Etc..." Idaho Administrative Bulletin, July 1, 1993, Volume 93-1,
"
Page 37-186). On extremely long riprap sections, it is recommended
that similar cutoff sections be used at several intermediate points
to reduce the hazard that would be created if failure of the riprap
occurred at anyone location.
11. Finished Surfaces. Placement shall result in a
smooth, even finished surface. Compaction is not necessary.
12. Placement of Riprap. The full course thickness of
the riprap shall be placed in one operation. Dumping riprap long
distances down the bank or pushing it over the top of the bank with
a dozer shall be avoided if possible. Material should be placed
with a backhoe, loader, or dragline. Dumping material near its
final position on the slope or dumping rock at the toe and
bulldozing it up the slope is a very satisfactory method of
placement, if approval is obtained for the use of equipment in the
channel.
13. Design Procedure.
West States (FWS) method.
Design procedure using the Far
a. The FWS method uses a single equation to deal with
variables for riprap.
D75
=
3.5
CK
WDS
for Channel Banks
where:
D75
=
Size of the rock at 75%
gradation, in inches
is finer in
W =
D =
S =
C =
K =
specific weight of water, usually 62.4 lbs./cu.ft.
Depth of flow in stream, in feet in flood stage.
Channel slope or gradient, in ft/ft.
A coefficient relating to curvature in the stream.
A coefficient relating to steepness of bank slopes.
b. The coefficient, C, is based on the ratio of the
radius of curvature of the stream, (CR), to the water surface
width, (WSW), so it is necessary for the user to make field
determination of these values. The coefficient varies from 0.6 for
a curve ratio of 4 to 6, up to 1.0 for a straight channel. If the
computed ratio for a particular proj ect is less than 4, the
designer should consider some modification less than 4.
CR/WSW
4 - 6
ç
0.60
6 -
9
0.75
0.90
9 - 12
Straight Channel
1. 00
c. The coefficient, K, ranges from 0.5 for a 1. 5: 1
sideslope to 0.87 for 3:1 sideslope. No values are given for
steeper or flatter slopes. Slopes steeper than 1.5: 1 are not
recommended. If slopes flatter than 3:1 are desired, it would be
conservative to use the K-value for 3:1 slopes.
Bankslope
1.5:1
K
0.50
1.75:1
2.0:1
0.63
0.72
2.5:1
3.0:1
0.80
0.87
Table 1A
Riprap Gradation Using FWS Method
% Finer by Weight Minimum Size Maximum Size
(Lbs. ) (Lbs .) . (Lbs. )
D,nn 1. 33 X D7 c; 2.0 X D7c;
D75 1.0 X D75 1. 67 X D75
Dc;n 0.67 X D7c; 1. 17 X D7~
D., E; 0.33 X D7E; 0.77 X D7~
Dn None 0.33 X D7E;
"
059.
DROP STRUCTURES, SILLS AND BARBS (Rule 59)
01. Drop structures. A drop structure shall be
constructed of rocks, boulders and/or logs placed within a stream
channel to act as a low level dam. Placement of a drop structure
perpendicular to stream flow will decrease the stream gradient,
dissipate stream energy and decrease stream velocity through an
increase in water surface elevation immediately above the
structure. Drop structures shall comply with the following
criteria:
a. Maximum water surface differential across (upstream
water surface elevation minus downstream water surface elevation)
a drop structure shall not exceed two (2) feet. The department
shall approve the final elevation of any structure.
b. Rock drop structures shall be constructed of clean,
sound, dense, durable, angular rock fragments, and/or boulders of
size and gradation, such that the stream is incapable of moving the
material during peak flows. Rocks shall be keyed into the stream
banks to minimize the likelihood of bank erosion, (See Figure 8 in
Appendix IX or see "Forms, Appendicies, Charts, Graphs, Etc..."
Idaho Administrative Bulletin, July 1, 1993, Volume 93-1, Page 37-
192) . '
c. Log drop structures are acceptable in four designs
including the single log dam, the stacked log dam, the three log
dam, and the pyramid log dam. Log ends shall be keyed into both
banks at least 1/3 of the channel width or a distance sufficient to
prevent end erosion. To prevent undercutting, the bottom log shall
be imbedded in the stream bed or hardware cloth, cobbles or
boulders shall be placed along the upper edge. Minimum log size
for a single log structure shall be determined by on-site
conditions and shall be placed to maintain flow over the entire log
to prevent decay. Each log drop structure must be accompanied by
downstream scour protection, such as a rock apron (See Figure 9 in
Appendix X or see "Forms, Appendicies, Charts, Graphs, Etc..."
Idaho Administrative Bulletin, July 1,1993, Volume 93-1, Page 37-
193).
d. All drop structures shall be constructed to
facilitate fish passage and centralized scour pool development.
02. Sills. A sill shall be constructed of the same
material and in the same manner as a drop structure. The top of
the sill may not exceed the elevation of the bottom of the channel.
The purpose of a sill is to halt the upstream movement of a
headcut, thus precluding the widening or deepening of the existing
channel. (See Figure 10 in Appendix XI or see "Forms, Appendicies,
Charts, Graphs, Etc..." Idaho Administrative Bulletin, July 1,
1993, Volume 93-1, Page 37-194).
03. Barb or Partial Drop structure. A barb or partial
drop structure shall be constructed in the same manner and of the
same material as a drop structure and placed into the stream
channel to act as a low level dam and grade control structure. The
barb will decrease stream gradient, dissipate stream energy and
redirect stream flow.
a. Barbs shall be constructed of clean, sound, dense,
angular rock fragments, of size and gradation such that the stream
is incapable of moving the material during peak flows.
b. Barbs shall be constructed with a downstream angle
of no less than 100 degrees and no greater than 135 degrees unless
otherwise specified.
c. Barbs shall "extend" into the channel a distance of
not more than 20% of the width of the channel unless otherwise
specified by the Director.
d. Barbs shall be keyed into the bank a distance equal
to or greater than the width of the structure and down to bed
level. Whenever moisture is encountered in the construction of the
keyways, willow cuttings or clumps shall be placed before and
during rock placement in such a manner that the base of the cutting
is in permanent moisture and the top extends a minimum of 6 inches
above grade (See Figure 11 in Appendix XII or see "Forms,
Appendicies, Charts, Graphs, Etc..." Idaho Administrative Bulletin,
July 1, 1993, Volume 93-1, Page 37-195).
DEPARTMENT OF THE ARMY
WALLA WALLA DISTRICT. CORPS OF ENGINEERS
LUCKY PEAK PROJECT OFFICE
HC.33 BOX 1020
BOISE. IDAHO 83706.9302
REPlY TO
ATTENTION OF:
December 30, 1996
Operations Division
SUBJECT:
NPW No. 962102480 '
Mr. Dan Torfin
Island Woods Subdivision
Homeowners Association
P.O. Box 193
Eagle, Idaho 83616
Dear Mr. Torfin:
This is in regard to your proposal to discharge gravel and
rock fill material into the Boise River at two locations
associated with restoring the river bank which was severely
eroded by high water the past two years. Reach #1 would be
repaired using a combination of gravel base fill, covered with
riprap rock. In addition, three rock bank barbs would be
constructed to provide additional bank protection. Reach #2
would be reinforced using riprap rock only. Your project is
located in Sec. 16, T.4N., R.1E., B.M., near Eagle, Ada County,
Idaho, and was the subject of your Joint Application for Permit,
Idaho state No. 63-S-1215 dated December 5, 1996.
section 404 of the Clean Water Act (33 U.S.C. 1344) requires
a Department of the Army permit be issued for the discharge of
dredged or fill material into waters of the united States,
including wetlands. This includes excavation activities which
result in the discharge of dredged material and destroy or
degrade waters of the United states.
Based on the information provided in your application, your
project complies with the terms and conditions of Nationwide
Permit 13 (33 CFR 330, Appendix A) and is authorized, subject to
the enclosed list of conditions and the following special
condition:
a. Gravel material used to restore the bank line is to be
used only as base fill and must be covered with lava rock or
heavy basalt rock. Under no circumstance is gravel material to
be used solely as bank protection material.
Please carefully review these conditions. If these required
conditions cannot be met, the nationwide permit is not valid and
an individual permit must be processed and issued prior to the
Printed on * Recycled. Pep....
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start of construction. If you should change your project from
the description provided in your application, the nationwide
permit may not be valid and you should contact us prior to the
start of construction.
This notification is valid until the nationwide permit is
modified, reissued, or revoked. All the nationwide permits are
scheduled to be modified, reissued or revoked by January 21,
1997. It is incumbent upon you to remain informed of changes to
the nationwide permits. We will issue a public notice announcing
the changes when they occur. Furthermore, if you commence or are
under contract to commence this activity before the date the
nationwide permit is modified or revoked, you will have 12 months
from the date of the modification or revocation to complete the
activity under the present terms and conditions of this
nationwide permit.
with regard to your proposal to remove a portion of a
downstream gravel bar as base fill material, I have determined
that this work will not destroy or degrade waters of the united
states. Therefore, a Department of the Army Permit is not
required provided the work is accomplished in accordance with the
following conditions:
a. The gravel bar can be removed down to the existing
surface water elevation at time of construction. Under no
circumstances is the gravel bar to be removed lower than the
existing water surface elevation.
b. Transport of gravel from the gravel bar to the work area
must be done with bucket type equipment. Under no circumstances
can gravel be pushed across the wetted channel.
c. Once the gravel removal activity is complete, the
disturbed area must be graded flat or sloped towards the river so
as not to leave any depressions that could trap fish as the river
rises and falls between seasons.
This determination is applicable only to Department of the
Army permits administered by the Corps of Engineers. It does not
relieve you of the responsibility to obtain other Federal, state,
and local permits which may be required. Authorization is
required from the Idaho Department of Water Resources for your
project. You should contact them to obtain any necessary permits
prior to the start of construction.
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.
"
Your project may also be subject to a local floodplain
management ordinance adopted pursuant to the National Flood
Insurance Program. I recommend that you contact your city or
county zoning office regarding any approvals required under their
jurisdiction.
Please contact me at 208-343-0671 with regard to any
questions you may have in this matter.
Sincerely,
/J/; é
/ :" /1 1! -
9~iJfí;; .f7 J, I :4>C~ I;:~
Greifory' J. Mart1nez
Regulatory project Manager
Enclosure
Copy Furnished:
Mr. Gene Gibson
Idaho Department of Water Resources
Western Region
2735 Airport Way
Boise, Idaho 83705-5082
NATIONWIDE PERMIT 13
Bank Stabilization
Bank stabilization activities necessary for erosion
prevention provided:
a. No material is placed in excess of the minimum needed
for erosion protection;
b.
length;
The bank stabilization activity is less than 500 feet in
c. The activity will not exceed an average of one cubic
yard per running foot placed along the bank below the plane of
the ordinary high water mark or the high tide line;
d. No material is placed in any special aquatic site,
including wetlands;
e. No material is of the type or is placed in any location
or in any manner so as to impair surface water flow into or out
of any wetland area;
f. No material is placed in a manner that will be eroded by
normal or expected high flows (properly anchored trees and
treetops may used in low energy areas); and
g.
The activity is part of a single and complete project.
Bank stabilization activities in excess of 500 feet in length or
greater than an average of one cubic yard per running foot may be
authorized if the permittee notifies the district engineer in
accordance with the "Notification" general condition and the
district engineer determines the activity complies with the other
terms and conditions of the nationwide permit and the adverse
environmental impacts are minimal both individually and
cumulatively.
WATER QUALITY CERTIFICATION CONDITIONS
1. To the maximum extent possible, work must be performed
at low flows.
2. Riprap material must be clean angular rock, free of
fines. Filter fabric is to be placed under the riprap where the
surface on which the riprap will be placed is such that it will
otherwise leach or erode into the water. The use of other
nonvegetative materials, such as tires, wire and steel posts are
not authorized.
3.
No equipment may be operated in the water.
No bank stabilization activities in excess of 500 feet
4.
in length or that average more than one cubic yard per running
foot are authorized by this permit.
5. vertical retaining walls are not authorized by this NWP
within the state of Idaho, unless they are faced with rock
riprap.
NATIONWIDE PERMIT CONDITIONS
General Conditions: The following general conditions must be
followed in order for any authorization by a nationwide permit to
be valid:
1. Navigation. No activity may cause more than a minimal
adverse effect on navigation.
2. Proper maintenance. Any structure or fill authorized
shall be properly maintained, including maintenance to ensure
public safety.
3. Erosion and siltation controls. Appropriate erosion and
siltation controls must be used and maintained in effective
operating condition during construction, and all exposed soil and
other fills must be permanently stabilized at the earliest
practicable date.
4. Aquatic life movements. No activity may substantially
disrupt the movement of those species of aquatic life indigenous
to the waterbody, including those species which normally migrate
through the area, unless the activity's primary purpose is to
impound water.
5. Equipment. Heavy equipment working in wetlands must be
placed on mats or other measures must be taken to minimize soil
disturbance.
6. Regional and case-by-case conditions. The activity must
comply with any regional conditions which may have been added by
the division engineer (see 33 CFR 330.4(e» and any case specific
conditions added by the Corps.
7. wild and Scenic Rivers. An activity may occur in
component of the National wild and Scenic River System; or
river officially designated by congress as a "study river"
possible inclusion in the system, while the river is in an
official study status. Information on wild and Scenic Rivers may
be obtained from the National Park Service and the u.S. Forest
Service.
a
in a
for
8. Tribal rights. No activity or its operation may impair
reserved tribal rights, including, but not limited to, reserved
water rights and treaty fishing and hunting rights.
9. Water quality certification. In certain states, an
individual state water quality certification must be obtained or
waived (see 33 CFR 330.4(c».
10. Coastal zone management. In certain states, an
individual state coastal zone management consistency concurrence
must be obtained or waived (see 33 CFR.4(d».
11. Endangered species. No activity is authorized under
any NWP which is likely to jeopardize the continued existence of
a threatened or endangered species or a species proposed for such
designation, as identified under the Federal Endangered Species
Act, or which is likely to destroy or adversely modify the
critical habitat of such species. Non-federal permittees shall
notify the district engineer if any listed species or critical
habitat might be affected or is in the vicinity of the project
and shall not begin work on the activity until notified by the
district engineer that the requirements of the Endangered Species
Act have been satisfied and that the activity is authorized.
Information on the location of threatened and endangered species
and their critical habitat can be obtained from the U.S. Fish and
wildlife Service and National Marine Fisheries Service (see 33
CFR 330.4(f».
12. Historic properties. No activity which may affect
Historic properties listed, or eligible for listing, in the
National Register of Historic Places is authorized, until the DE
has complied with the provisions of 33 CFR 325, Appendix C. The
prospective permittee must notify the district engineer if the
authorized activity may affect any historic properties listed,
determined to be eligible, or which the prospective permittee has
reason to believe may be eligible for listing on the National
Register of Historic Places, and shall not begin the activity
until notified by the District Engineer that the requirements of
the National Historic Preservation Act have been satisfied and
that the activity as authorized. Information on the location and
existence of historic resources can be obtained from the state
Historic Preservation Office and the National Register of
Historic Places (see 33 CFR 330.4(g».
section 404 On1v Conditions: If addition to the General
Conditions, the following conditions apply only to activities
that involve the discharge of dredged or fill material and must
be followed in order for authorization by the nationwide permits
to be valid:
1. Water supply intakes. No discharge of dredged or fill
material may occur in the proximity of a public water supply
intake except where the discharge is for repair of the public
water supply intake structures or adjacent bank stabilization.
2. Shellfish production. No discharge of dredged or fill
material may occur in areas of concentrated shellfish
production, unless the discharge is directly related to a
shellfish harvesting activity authorized by nationwide permit 4.
3. suitable material. No discharge of dredged or fill
material may consist of unsuitable material (e.g., trash, debris,
car bodies, etc.) and material discharged must be free from toxic
pollutants in toxic amounts (see section 307 of the Clean Water
Act).
4. Mitigation. Discharges of dredged or fill material into
waters of the united states must be minimized or avoided to the
maximum extent practicable at the project site (i.e. on-site),
unless the DE has approved a compensation mitigation plan for the
specific regulated activity.
5. Spawning areas. Discharges in spawning areas during
spawning seasons must be avoided to the maximum extent
practicable.
6. Obstruction of high flows. To the maximum extent
practicable, discharges must not permanently restrict or impede
the passage of normal or expected high flows or cause the
relocation of the water (unless the primary purpose of the fill
is to impound waters).
7. Adverse impacts from impoundments. If the discharge
creates an impoundment of water, adverse impacts on the aquatic
system caused by the accelerated passage of water and/or the
restriction of its flow shall be minimized to the maximum extent
practicable.
8. Waterfowl breeding areas. Discharges into breeding
areas for migratory waterfowl must be avoided to the maximum
extent practicable.
9. Removal of temporary fills. Any temporary fills must be
removed in their entirety and the affected areas returned to
their preexisting elevation.
Further Information:
(1) District Engineers have authority to determine if an
activity complies with the terms and conditions a Nationwide
Permit (NWP).
(2) NWPs do not obviate the need to obtain other Federal, state,
or local permits, approvals, or authorizations required by law.
(3) NWPs do not grant any property rights or exclusive
privileges.
(4) NWPs do not authorize any injury to the property or rights
of others.
(5)
NWPs do not authorize interference with any existing or
proposed Federal project.
State of Idaho
DEPARTMENT OF WATER RESOURCES
Western Region, 2735 Airport Way, Boise, Idaho 83705-5082 - (208) 334-2190
FAX (208) 334-2348
PIIILlP E.IIATI
(;IIV.:KNClK
KARL J. DREHER
DlRECfOR
December 23, 1997
.
0'
Daniel Torfin
Island Woods Homeowners Association
PO Box 193
Eagle ID 83616
RE:
Request for Extension
Application for stream Channel Alteration Permit #63-S-1215
Repair of bank and placement of three bank barbs.
Dear Mr. Torfin,
You may consider this letter as an extension to the above
referenced permit as described in your request dated December 22,
. 1997.
ALL CONDITIONS OF THE ORIGINAL PERMIT SHALL REMAIN IN EFFECT, WITH
THE EXCEPTION OF THE FOLLOWING CHANGE:
THIS PERMIT SHALL EXPIRE ON DECEMBER 31, 1998.
If you have any questions, please contact me at (208) 334-2266
(ext. 109) or this office.
Sincerely,
y~~
M. Gene Gibson
stream Protection specialist
MGG:kg
cc:
IDOL, IDFG, IDHW-DEQ, Corps of Engineers
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