environmenal as ses sme n-t

7DTCCAD-A251 254

ENVIRONMENAL AS SES SME N-T

HOG ISLAND BANK PROTECTION - LOCK AND DAM 16

AND

HURON CHUTE CLOSING DAM MODIFICATION - POOL 18

JULY 1990

92-14562Approved for public rr-leSNJ ilMh jji -- uon u9_e US Army Corps

of EngineersRock Island District

DEPARTMENT OF THE ARMY

ROCK ISLAND DISTRICT. CORPS OF ENGINEERS

CLOCK TOWER BUILDING-P.O. BOX 2004

ROCK ISLAND, !LLINOIS 61204-2004EFrLY TO

ATTENTION Of-

CENCR-PD-E

ENVIRONMENTAL ASSESSMENT

HOG ISLAND BANK PROTECTION - LOCK AND DAM 16AND


Ac-~no F 0NT ! •II -

Distritut Iu./

JULY 1990 Avai..alility Code sA iv l andOor

Dist ia

ENVIRONMENTAL ASSESSMENT

HOG ISLAND BANK PROTECTION - LOCK AND DAM 16AND


TABLE OF CONTENTS

Subjct

I. Purpose and Need for Action EA-1

II. Project Description EA-2

III. Alternatives EA-2

IV. Affected Environment EA-3

V. Environmental Ef'Eects EA-3

VI. Relationship to Envirunental Requirements EA-7

VII. Coordination EA-7

List of Tables

No.~ Title

EA-1 Effects of the Proposed Action on Natural andCultural Resources EA-4

Lists of Plates

No. Title

1 Lock and Dam No. 16 Hog Island Bank Protection Vicinity Map2 Lock and Dam No, 16 Hog Island Bank Protection Plan and Detail3 Pool 18 Closing Dam No. 18 Repairs Vicinity Map4 Pool 18 Closing Dam No. 18 Repairs Profile

ATTACHMENTS:

Finding of No Significant Impact (FONSI)Section 404(b)(1) Evaludcion (40 CFR 230)Pertinent CorrespondenceDistribution List

EA-i

Ii

ENVIRONMENTAL AS 'ESSMENIJ

HOG ISLAND BANK PROTECTION - LOCK AND DAM 16AND,


I. PURPOSE AYD NEED FOR ACTION.

The purpose of this environmental assessw-nt is to address the effects ofnew construction proposed as part of navigation channel maintenance.Navigation channel maintenance includes periodic repair of existingtraining works or regulating structures, e.g., wing dams and closing dams,as well as modification of these structures. These actions generallyinvolve large grade limestone rock placement.

Modification may include the raising, lowering, or notching of thpse struc-tures to optimize their performance in flow control and sediment Lransport.Also, navigation dams and appurtenant structures require periodie 'ockplacement for repair or improvement of bank protection.

This document specifically addresses rock placement at two siteG. iTne site

is located at Lock and Dam (L/D) 16 between Rock Island County, Illinois,and Muscatine County, Iowa. The site, referred to as Hog Isla;,d, is the

location of the equipment storage yard for L/D 16. It lies bvitwoen rhegated portion and the overflow spiilway portion of the dam, At approximars

river mile (RM) 457.2. The other site is an existing notche.. closing dambetween Huron Island and the Iowa bank at RM 425.

The lock equipment storage yard, located on the pool or uy itraem side ofL/D 16, is threatened by continual erosion and requires .- M.Int ofapproximately 500 feet of rock for effective bank stabfl.zation. &)gIsland also is eroding immediately downstream of the ga'ec! portion Co th.dam and requires 300 feet of riprap for effective bank : ahilization.

The subject closing dam reduces flow to Huron Chute, thereby maintaiiingflow in the navigation channel. Recent increases in thc Crequenc'. ancamount of dredging required between RM 419 and 425 indicate that -.'igcrion

channel flows may not be adequate to transport sedimen. through L:-is rlrerreach. Engineering consideration of the Huron Chute closing dam indicocesthat the notch may be contributing to this problem b'; ilowing excess lowto pass down Huron Chute instead of the navigation eiUnnel.

Alternatives to the proposed action are limited. TV'y include the noFederal action alternative, or other configurations and quantities of rock.

The project is expected to help in maintaining the navigation channel, withno significant impacts to natural, cultural, economic, or social resources.

For this reason, an Environmental Impact Statement (EIS) will not be

EA-1

prepared for this action. Because the proposed action is subject to thep:ovisions of the Clean Water Act, a Section 404(b)(l) Evaluation has beenprepared for the project (see attachments). Section 401 .comliance hasbeen sought through coordination with the States of Illinois and Iowa. Ajoint Public Notice has been prepared and distributed concurrently withthis document. Copies of correspondence relative to this action areincluded in Pertinent Correspondence, attached.

!I. PROJECT DESCRIPTION.

The proposed work addressed in this document involves placing bank protec-tion and modifying a closing dam in conjunction with annual maintenance andrepair of existing training works (wing dams) in Mississippi River Pools16, 17, and 18 during the 1990 construction season. (See plates 1 through4.)

The site of proposed riprap placement is located adjacent to L/D 16 at RM457.2 (see plate 1). The project site is more familiarly known as HogIsland,

Bank protection of this type has been requested by various Federal andState agincies in order to reduce erosion throughout the Upper MississippiRiver. These requests have been made during several interagency forums andare perceived to be of overall benefit based on erosion reduction andincreases in habitat diversity.

In addition to armoring the island tip, bank protection will be extendedapproximately 300 feet down the east side of the island immediate to thegated portion of the dam. Up to 5,000 tons of limestone rock will becnquired to provide adequate bank protection at both sites. (See plate 2or the location of these sites.)

A notched closing dam exists near the upstream end of Huron Chute. Theclosing dam has undergone engineering evaluation and it has been determinedthat the function of the structure in flow diversion would be better servedby closing the notch and reducing flow in Huron Chute (see plate 3).

It is proposed to repair this structure and improve the bank protectionassociated with it (see plate 4). Up to 6,000 tons of rock will berequired for this action. A 50-foot boat pass will remain in place of theexisting 150-foot boat pass.

III. ALTERNATIVES.

Alternatives to the proposed action include:

EA-2

authorized responsibilities for maintenance of the 9-Fbt Channel Naviga-tion project; Periodic maintenance and repair of training works are neces-sary to maintain the ihtegrity of the navigation 6hannel. Further loss of

the Hog Island land mass evenitually could- threaten the--structural integrityof L/D 16.

B. Construction of Training Works in Other Locations 'Conf.gui ns, This alternative was not selected based on nydraulicdesign necessary tc capture and maintain flow in the main channel of theMississippi River at the noted location in Pool 18, Huron Chute.

C. Revair of Structures Without Additional Bank Protection. Thisalternative was not selected due to the need to improve protectivefeatures. The need for bank protection is evidenced by existing levels ofbank erosion and loss of storage yard area.

IV. AFFECTED ENIOMN.

Prior to L/D 16 construction, Hog Island was approximately 2 miles long,extending between RM 456 and 458. Construction of L/D 16 bisected HogIsland, inundating the upstream section and leaving two exposed land masseson the pool side and one land mass on the tailwater side. Vegetation onthe island is primarily floodplain forest comprised of species such assilver maple (&= saer harin), cottonwood ( uju deltoides), willow(§n1I sp.), box elder (&= negu ), and mulberry (Morua sp.).

Wildlife species typically using the area include small mammals. Thecombination of wooded island and adjanent slough provides habitat forreptiles and amphibians. The mature forest also provides habitat for thenorthern flicker and other woodpecker species, as well as nesting cavitiesfor owls. The bald eagle is a winter residtit and uses large trees on theshoreline of the island as perches. Other biz&- ',at utilize shorelineperches include the belted kingfisher and turkey .ture. Wading birdssuch as great blue herons utilize the slough as a teding station

The aquatic community found at the Hog Island erosional sites is likely tobe limited. Catfish species are known to utilize cut banklines for spawn-ing, however, these sites are of questionable stability due to erosion andwould limit spawning success.

The aquatic community at and around the Huron Chute closing structure wouldtypically be diverse, owing to the range ot available habitat types withina small area. The Iowa Department of Natural Rosources has highlighted theclosing structure's nursery value to flathead catfish.

V. ENVIRONMENTAL EFMfCS. Environmental effects are summarized intable EA-I.

EA-3

TABLE EA-1

Effects of the Proposed Acttqnon Netgrai and Cutiril Resou'rces

Types of Measurement

Resources uthorities of Effgcts

Air Quality Clean Air Act, as amended No significant effect

(42 U.S.C. 1657h-7, et seq.)

Areas of Par- Coastal Zone Management Act Not present in planning areaticutar Concern of 1972, as amended (16Within the U.S.C. 1451, et seq.)Coastal Zone

Endangered and Endangered Species Act of 1973, No significant impactsThreatened as amended (16 U.S.C. 1531, anticipated

Species Critical et seq.)

Hobitat

Fish and Fish and Wildlife Coordination No significant effect

Wildlife Act (16 U.S.C. 661, at seq.)

Floodptains Executive Order 11988, Flood No significant effect

Plain Management

Historic and National Historic Preservation SHPO coordination

Cultural Act of 1966, as amended (16 initiated

Properties U.S.C. 470, et seq.)

Prime and Unique CEO Memorandum of August 1, 1980; No significant effect

Farmland Analysis of Impacts on Prime or

Unique Agricultural Lands inImplementing the National

Environmental Policy Act

Water Quality Clean Water Act of 1977, as No significant effect

amended (33 U.S.C. 1251, et seq.)

Wetlands Executive Order 11990, Protec- Present in planning area;tion of Wetlands, Clean Water effect anticipated to be

Act of 1977, as amended (43 negligibleU.S.C. 1857h-7, et seq.)

Wild and Scenic Wild and Scenic Rivers Act, as Not present in planning area

Rivers wended (16 U.S.C. 1271, et seq.)

Mineral National Environmental Policy Act No significant effect

Resources of 1969, P.L. 91-190, as amendcd

EA- 4

The long-term effect of the project: i expected, to be ibenefcial tQ-,.IMade resources in the area-with no significant adverse effct ,on aturaresources.

Wildlife species whichmay currently utilize theon. g Islad project areawill not be significantly affected by the action., The placeontof ripapbelow the normal waterlevel and extension of bakprotectionel os t the damis expecteduto benefit aquatic resources bigy increasing substrate vrand reducing bank caving.

Rock bank protection is not expected to affect terrestrial speciescurrently using the project area.

Closing dam modification will reduce, but not eliminate, flow enteringHuron Chute during all discharge conditions. This is expected to haveminimal overall effect on the aquatic system in Huron Chute, with terres-trial effects limited to reduction of bankline erosion in Huron Chute.

This structure was last modified in 1986 and 1987 during other repair work.These modifications likely resulted in the combination of depth velocityand cover -onditions favorable to juvenile flathead catfish. It isexpected that the fishery values will be similar to the preconstructioncondition. Pre- and post-construction fish sampling will be attempted todetermine fishery effects.

Reduction of side channel flow during the winter months may increase habi-tat suitability fot fish species requiring low velocities. Increase ofnavigation channel flow is intended to improve sediment transport and scourof sand accretions between RH 419 and 425. Because of the relative insta-bility of the sand substrate in this reach, little colonization or develop-ment of a diverse benthic community would be expected. Therefore, reversalof accretion in this reach is not expected to be detrimental to the aquaticcommunity.

Federally listed threntened and endangered species were considered for this

project. Threatened or endangered species which potentially may beaffected by actions of this type are the bald eagle (Haliaeetus

lebiiaeRbal), the Higgins' eye pearly mussel (Lampsilis hi~ginsi), andthe fat pocketbook pearly mussel (Poramils cax).

Bald eagles utilize large trees along the shoreline throughout the area asresting and feeding perches. Over the long term, bank stabilization shouldserve to prevent the loss of shoreline trees. No such trees would need tobe removed for construction of the proposed project. Project constructionwill take plare during the summer months, therefore, no significant impactsto the wintering bald eagle population are anticipated to result fromproject activities.

Becatise the bankline substrate through the Hog Island area is somewhatunstable, as evidenced by the erosional activity, it is not likely that thearea supports any signficant mussel fauna including either endangered

EA-5

4 mussel species. Also, neither mussel species is known to, occur at oraround either work site. Therefore, the proposed project 'is,.hot expectedto affect the Higgins' eye oc the fat pocketbook pearly mussel.

Minor, temporary impacts to noise levels and air due tocotnstruc-tion activity may occur as a result of construction and transportation ofmaterials. This may have temporary adverse effects on users of nearbyrecreational sites. No long-term significant impacts are anticipated, andno air quality standards should be violated.

Minor, temporary increases in turbidity end levels of suspended sedimentswould occur during construction activity. No long-term adverse effects towater uuality are anticipated. A Section 404(b)(1) Evaluation has beenprepared and is attached to this document. Section 401 certification hasbeen requested from the State of Wisconsin and will be obtained prior toconstruction.

Archeological sample surveys with historic documents review and geomorpho-logical modeling conducted for Navigation Pools 16, 17, and 18 by the RockIsland District failed to identify any previously located archeologicalsites or historically sensitive locations in the vicinity of the projectareas. Because no ground modification is proposed, the project has nopotential to affect any significant historic property. Comments from theIllinois and Iowa State Historic Preservation Officers are solicited byreceipt of this document.

Construction of bank protection and the closing dam is expected to havelittle effect on aesthetic values. No displacement of people or farms willoccur, and no change in community Cohesio is anticipated. No significantimpacts to community and regional growth, property values and tax revenues,or employment and labor force are expected to result from this action.Business and industrial development may be considered to benefit from main-tenance of the navigation channel and training works in this section of theriver. No significant impacts to JJfe. health. and safety are anticipated.The completed project is likely to nlightly increase fishing activity, andfuture use of the riverward portion of Hurricane Island for dredged sanddisposal will attract recreational boaters. Therefore, the project isexpected to slightly benefit public recreational facilities and services.No impacts to mineral resources will result from this action.

Considered in conjunction with future proposed work in the project area,cumulative eff, cts of the project include bank stabilization, reduceddredging, and .light recreational enhancement.

With no Federal action, no adverse effects would occur from construction,bank caving and sediment input would continue, and no long-term benefits torecreation would be expected. Alternative locations for bank protectionand closing dam construction would be anticipated to have impacts similarto the preferred alternative, but would not serve the immediate need fortraining works maintenance and bank protection.

EA-6

VI. RELATIONSHIP. T0 ENVIRONME L REOUIREMENTS

The project will comply with Federal environmental laws, Executive ordersand policies, and State and local policies icludingthe , as

amended; the Clean Water Act, as amended; the EddangeredSecies:'Adt ofiU, as amended theFederal Water Prolect RecreatiobiAct;' t i, inWildlife Coordination Act of 1958, as amended; the Land and WaterConservation Fund'Act of 1966, as amended; the NatiOnal EnvironmentalPolicy Act of 1969, as amended; and the National Historic Preservation Act2f 19i6, as amended.

The project is located on federally owned land and will not result in theconversion of farmland or existing land use plans. This segment of theUpper Mississippi River is not a federally recognized wild or scenic river,The project will not result in any significant change in floodplain stor-age, and no significant loss of wetlands will occur from project implemen-tation. Therefore, this action will not conflict with the provisions ofthe f'rmland Protection Policy Act of 1981; Executive Order 11988,Floodplain Management; f cutive Order 11990, Protection of Wetlands; orthe Wild and Scenic Rivers Act of 1968.

VII. COORDINATION.

Coordination has been maintained throughout the planning and design processwith the U.S. Fish and Wildlife Service (USFWS), the Illinois Department ofConservation, and the Iowa Department of Natural Resources (see PertinentCorrespondence).

Coordination with the U.S. Environmental Protection Agency and the Illinoisand Iowa State Historic Preservation Officers (SHPO) is being pursuedthrough distribution of this Environmental Assessment and F-4 Icitation ofcomments.

Wing and closing dam repair work, bank stabilization, and improvement ofnavigation training wor:s are coordinated through an interagency teamreferred to as the Committee to Assess R t2atory Structures (CARS). CARSconsists of interdisciplinary personnel from the Corps of Engineers and theUSFWS. The USFWS ensures the input of appropriate State natural resourcestaff to the planning process. CARS activities also are discussed in otherforums such as the Fish and Wildlife Interagency Committee (FWIC) and theRiver Resources Coordinating Team (RRCT).

EA-7

FINDING OF NO SIGNIFICANT IMPACT

HOG 1EPLAND BANK PROTECTION LOCK AND DAM 16AND

HURON CHUTE CLOSING DAM MODIFICATION --POOL 18

I have reviewed the information provided by this Environmental Assessment,along with data obtained from cooperating Federal, State, and localagencies and from the interested public. Based on this review, I find thatconstruction of the proposed bank protection and closing dam will notsignificantly affect the quality of the environment. Therefore, it is mydetermination that an Environmental Impact Statement (EIS) is not required.This determination will be reevaluated if warranted by later developments.

Alternatives considered along with the preferred action were:

. No Federal action

- Closing dam construction at original location

. Repair of wing dams with no bank protection

Factors considered in making a determination that an EIS was not requiredare as follows:

a. The action is expected to reduce the need for channel oair.tenancedredging and disposal activities in this section of the river.

b. Initial loss of and disturbance to aquatic habitat duringconstruction will be offset by increased habitat diversity followingproject completion.

c. No significant social, economic, environmental or cultural impactsare anticipated as a result of this action.

John R. Brown(Date) Colonel, U.S. At-y

Di.strict Engineer

CORAPS OF ENGINEERS

MUSCATINE COUNTY

61

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V1CIN1OF W' MA

ISLAAND

6420S~O ENIIER .ARMY

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PLATE 2

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........................................

POOL IS

CLOSING, DAM Na 18j PAItVICINITY MAP

CORPS "OFENGINEERS:. - US.ARMYV

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.. . . . . . . . .. . . . . . . . .. . . . .. . . .

a. .....................

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...................... . .. PLATE..4

SIECTION 404(b)(1) EVALUATION~

Section 404 (b)(1) Evaluation (40 CFR 230)US Army Corps loc, 31 Tm.;, TI7N xsg.R5W wttemy MR kpacat , mbe, 188750f E i (, ,ws ia c ti o . 3 -.. .i v M Y , o k -J l I L

NONE c..t 1 1AcjQ0U c,a Des Moinesest, TA TApice, .A l c Ian

Acivity Bank Protection Lock and Dam 16 Closing ate Prep.redl2 June__U90Dam Construction at Huron Chute

1. vi$ew oft Copliasco (62),301011-(dl) MfUL.NLAY jI/ , 0 1ML 2/

A review of the Perlit epIlCetio41 bdicats that:L

a. lTe discharge represents the leant onvlroneentally daaging practicable a.lternativo ai.*if in a special aquatic site, th activity apsociated vith the discharge maxt have &irast

access or proximity to. or We located in. thC aquatic acosytm to fulfill its ,Waic

uroe ifno. see Section 2 and Information gathered fo? IA alterative). VIES OD J * ~ ~ ~b. The activity does not eppear to (1) siol*te applicable state moter quality steandards

or effluent otndards prohibited under SectLon 301 of UA; (2) JeopardiLa the existenceof !eser11 liet.d e ngered or thratoned species or their habitt; esd (3) violeterequiraets of any e4erally designated marine sanctuary (if no, ea Section 2b sadcheck rsponses fine resource end water quslity certifying agescies). YES [j) No= YE Ns o

4. The activity sill sot cause or contribute to Significant degradation of water@af thbe iited State@ tacludiag ,dverse effect's a huas baltb, life etages of

ergnee deetndent " aquatic scosyst.e, ecvtyote. diversity, productivity -dstability. and recreatifot.l, athetic, .n economic values (ift s. mee Soctis . , LS 100 ° S ND-

d. Appropriate sad practicable steps have bee taken to olatlsa potential adverse Impactsof the 41i-cLOFO oe the 0Aqatic 6coastns (if so, &s Sactias, Y) U I YES e iiu

2. Technical Iovala.tio Yactors (Swbarts C-f)

a. Physical an Choolcal laracteristics of th" Aquatic cosystas (Subpart C) W'A 3ot Significaot $Irllcn t1. Subs.,rao Impacts........................................................... I 7 1 ...... ~2. Sspeanded prtictuJtto/turi dit y Impacts ............................................. '

3. Usater tohlan Impacts ........... o..................................... . .. .X

. Alj teatit t ors.64 water f ,utuat ions/hrifeperIod ... ...............................-- .- _____

.f e .Alter to" "t sIity gradients ................................................ [L J

b. "rinog ical t) resit of the A.testit Ecogyeta (iubpart ii)

C. Special Aqoattc Site& (Subpart E)i. iS ctuartes and ref.4es ................................ ............... X_,_,.,2. hetndt ................................................................... x1. MA fltes .....fa.................................................................. -6. Vegetate 4 sh o s 6 ...............................................................S oral ral s ..................................................................... I6. 11 1 It and Peo1 coopiaea........................................................... ____________

(tlectr a. unicipal and prvote *ctr sappClee .................................. . ._

3. Elfet1 On .Wter-r 4lat recreation .............................................. X_ _

E. t :i on parks., nioa 00nd hisorca aoaee nainlsahreal

rse. "research sites. and similar Preserves ......................................

IMtJti$ %aet@ a check Is placed urnar the significant category, preparer Ad explanation as ottached ahat.

7. Evaluatiot of Dreded fr fill Ftsriel (Subpart G) 3/

a. The following informat ion he. boe considered in eirvalati the biological availSbility of possible contam ante s dredged or fillesteriel. (Cock only these appropriate).

1. Physical €hracteristics ...... °c...i........................................................................................2. lRyrogrfphy in relatiom to ksAon or anticipated aourcso of contaminasts .......................... .......................

3. fteowlto ftoo priviouo testing of the waterial or sisilar material is the vicinity of the Project ................. .... j3. tzovn, uignif,cont wources of persistent peu ictdee frce land runoff or p.rcoletiOf....................................

.. Spill recorde or petrol e. products or desigrtede. (Section 311 of CdA) hazardous awubtance ............................4. Otker publl refcorde of etigtfitant intruvauctiou of con isti" to in dustries, nunicipalittes, an *chat source; .......7. dAru- existe.e of s besoatal satsrial deposat* of oubdtances which could be released In twrafl qu atities to the aquaLic

envirorms.tt by s68n-lndaCed diChKerAe &CttViCes .................................................................. ... t, Other go, rce (specify) .........................................................................................

List epproprite referonces (see attached sh*et).

b A. fu satian of he appafO.rl6te teforoat.o In Uaove lnLdates that there is creoo0 Lo b ieve the pcoposeo drgged or fi., batertl Isnot a Cfrrir of LOnra~nlrsni, or that ltls of Lorlaniarants ar. &.bstantineiy 411silar at easrectIvn s iposal sites &Adn ot At~eaY tores ult I F .egradst ion of the disposal site. The esterisi &&*to the test ing exclusion criteria. L

A. Dihposel Site Delineatior. (1230.13(f))

a. The following factors. so appropriate. hove been considered tn evaluating the disposal site.1. Depth of water at disposal site ...........................................2. Ourrsnt velocity, direction$ and variability at disposal site .... .......................3. Degree of turbulence .................................................... x~~A. Wster column stratifictionl ..................................................

S. Discharge vessel speed and direction ............................................

7. Dredged material characteristics (constituents. amount and type of msarial. settling velocities) .......

G. Mamber of discharges per unit of time............................... ................................................9. other factors affecting rates and patterns of sizing (specify)......................................................

List appropriate references (see attached sheet)

b. An ovaluvion of the appropriate factors is so above Indicates that the disposal sits and/or siteof oiting %one are acceptable ................................................................................. YES M u11 1.

5. Actilans to Miniaito Adverse Effects (Subpart Ni)

All appropriate and piacticable steps have been taken through application of recomendations of 1230.70-230.77to ensure alnins! adverse effects of the proposed discharge. List Actions Tsben (ate attached sheet) .................YES [; 100 r=

10.11. Return to Section I for final oaee of compliance review. see also note 3/ t~

6. factual Determinations (1230.11) .

A review of the appropriate Information as identified in Items 2-5 above Indicates that there to minal . '

potential for short-term or long-term environmental effects of the proposed discharge as related to:

a. Physical substrate at the disposal site (review sections 2s. 3, A. and $) .................................. YEIS . Nob. 'dater circulation, fluctuation* and salinity (review sections 2s. 3, 4. and 5) ................................... YES NDc. Suspended particulate*/turbidity (review sectione 2s. 3, A. sod 5) .............................................. YES Nobd. Contaminant availability (review sections 29, 3. and 4)........................................................ YES I No

a. Aquatic ecosystem structure and function (review sections hb and c, 3, sod 5) .................. YES Nf. Disposal site (review sections 2, 4, and 5)....................................................................YE 9g. Cumulative impact on the aquatsc ecuoyste..................................................................... YES _ vb. Secondary Impacts on tne aquatic ecosystem .................................................................... YESN

7. Evaluation Arapsp~ibi 1U

a. This eveluacioo was pregared by;: R. A. CLEVENSTINE Do_____bte; 12 June 199(;

Pootion; BIOLOGIST_________

b. This evaluation was reviewed by: MIHELA COCKERILL tote. ______________

PosIt Ion: CHIEF, ENVIRONMENTAL ANALYSIS BRANCH

a. Th rpsddipslst ordshreo degdodil aeilcmpiswt h Fato 0(b()gieies......

a. The proposed disposal site for discharge of dredged or fill material complies with the Section 404(Cb)(1) guidelines.......1

with the inclusion of the tzllowin& conditions (see attached sheet) .........................................................c. The proposed disposal &It* for dischArge of dredged or fill material does not comply with the Section 404(b)(1) guidelines for

the following reason(s):1. There io a less damaging practicable alternative.....................................................................2. The proposed discharge will result In significant degradation of the aquatic ecosystems................................3. The proposed discharge does not Include all practicable an~d appropriate measures to minimise potential hara

to the squair ecosystem................................................................................................IZM

SICHATUXE ________________ bte:_____________

John R. Brown, ColonelU.S. Army District Engineer

*A negative, significant, or unknowrn response Indi~ates that the permit application "ay cot be in compliance with the Section 404.(b)(1) Guidelints.

I/ Ki.'ativt responses to three or nor. of the compliance criteria at this stage indicate that the proposed projectesayx not be evaluated usingthis '@hort-form procedure.' Care should be used In assessing pertinent portions of the technical Infotuation of items 2 o-d below, beforecompiling the final review of compliance.

2f Ngattve response to one of the compliance criteria at this stage indicates that the proposed project does not coaply with the muidelines.If the economics of navigation an,' anchorage of Section 404(b)(2) are to be evaluated in the deciaion-msiing process, the -nrot-to-' evalva..;'process is Inappropriate.

31 If the dredged or fll material cannot be excluded from Individual testing, the *short-forsm %,slu~atioc process is inappropLate.

Application No. 188750CENCR-PD-EAttachment to: Section 404(b)(1) Evaluation (40CFR 230)

5. Actions to Minimize Adverse Effects (Subpart H).

a. Cutting and grading of bank materials is notanticipated. No earthen fill will be used.

b. Riprap material will consist of physically andchemically stable rock and will not significantly contributeto water quality impacts.

c. Riprap will contain large grade rock to contributeinteerstices for aquatic habitat.

DETERMINATION

Section 404, Subsection (f), Paragraph (b), exempts thedischarge of dredged or fill materials for the purpose ofmaintenance, including emergency reconstruction of recentlydamaged parts of currently serviceable structures such asdikes, dams, levees, groins,riprap, breakwaters, causeways,and bridge abutments or approaches, and transportationstructures from regulation under any or all parts of Section404 of the Clean Water Act. This involves that portion ofthe existing closing dam and bank protection that have beendamaged by erosion. However, a significant portion of theproject involves new construction. Therefore, the balanceof the proposed project invr'lving new work is subject toevaluation and regulation under Section 404, Subsection (b),Paragraph (1), and is addressed on the preceding page andabove. Benefits realized from the proposed action includestabilization of erodable bank materials, reduction ofdredging and disposal requirements, and protection of theintegrity of the Nine Foot Channel Navigation Project.

R. A. ClevenstineBiologist, CENCR-PD-E

PERTINENT CORRESPONDENCE

United States Department of the InteriorFish and Wildlife Service "''Rock Island Field OMe (ES)

1830 Second Avenue, Second FloorRock Island, Illinois 51201 COM: 309/793-5800

FTS: 782-5800in Reply Refer to:

June 20, 1990

Colonel John R. BrownDistrict EngineerU.S. Army Engineer District

Rock IslandClock Tower Building, P.O. Box 2004Rock Island, Illinois 61204-2004

Dear Colonel Brown:

We have reviewed the draft environmental assessment for HogIsland bank protection, Lock and Dam 36, and Huron Chute closingdam modification, Pool 18. The projects propose to armor areaswith rock riprap that are subject to erosion.

We concur that there should be no adverse impacts to fish andwildlife resources from project construction. The riprapplacement on Hog Island will reduce erosion of that island.Reducing the size of the Huron Chute notch should not adverselyaffect the chute, and may reduce dredging needs in the nearbychannel.

We also concur that there will be no effect from projectconstruction on the endangered species. This precludes the needfor further action on this project as required under Section 7 ofthe Endangered Species Act of 1973, as amended. Should thisproject be modified or new information indicate endangeredspecies may be affected, consultation should be initiated.

This letter provides comments under the authority of and inaccordance with provisions of the Fish and Wildlife CoordinationAct (48 Stat. 401, as amended; 16 U.S.C. 661 et seq.); and theEndangered Species Act of 1973, as amended.

c incerely,

Richard C. NelsonField Supervisor

cc: IDNR (Aspelmeier)

IDOC (Sallee)

STATE OF

TERRY E. BRANSTAD, GOVERNOR DEPARTMENT OF NATURAL RESOURCESLARRY J. WILSON, DIRECTOR

June 25, 1990R. R. 3 Box 434Muscatine, Iowa 52761

Bob ClevenstineU.S. Army CorpsCENCR-PD-EClock Tower Bldg.Rock Island, Ill. 61204-2004

Reference - Draft E.A. for Huron Chute Closing Dam Modification

Dear Bob:

In our routine sampling of the Mississippi River fisherypopulations, we have noted that the above mentioned closingstructure is valuable flathead catfish (Pylodictis olivaris)nursery habitat. My concern is that the proposed project mayalter the structure to the point that this habitat will nolonger be useable by small flatheads.

Therefore, I recommend that a before and after study beconducted to quantify the change in use of the area asflathead catfish nursery habitat and, if the use is adverselyaffected, corrective measures be taken.

Sincerely,

Bernard Schonhf

Mississippi River Biologist

BS/!as

C! C' ovpiWd'te rMillar UMrWS)

Sallee (II. DOC)

WALLAC l STATE OPFiCE BUILDING/ DES MOINES, IOWA 50319 515-281-5145

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