Protecting Public Health and the Environment.

Status of §401 Certification Decisions

§401 Certifications of General NPDES Permits in Idaho

DEQ has certified or proposes to issue the following §401 certifications of general NPDES permits:

To view information regarding the general NPDES permits for which these certifications have or are proposed to be issued, visit the EPA Region 10 General NPDES Permits webpage.

§401 Certifications of Nationwide and Regional General Dredge and Fill Permits

Regional General Permits

DEQ has certified Regional General Permit 27 authorizing the addition of piers and floating docks, marine launching rails, mooring piles, and portable boat-lift stations in Pend Oreille Lake and Pend Oreille River. The permit expires March 21, 2015. DEQ's final §401 certification may be accessed here:

DEQ has certified Regional General Permit-Benthic Barriers authorizing the discharge of fill materials, structures and/or work associated with the placement of temporary benthic (bottom) barriers to control the growth of invasive, noxious aquatic vegetation primarily in lakes and reservoirs, but also possibly streams and rivers.

DEQ has certified Regional General Permit-Emergency (RGP-E) authorizing the temporary discharge of dredged or fill material to restore, repair, and/or stabilize features that have been damaged, destroyed, or are in imminent danger of failing during emergency conditions, defined as conditions which would result in an unacceptable threat to human life, significant loss of property, and/or significant economic hardship.

To view a listing of Regional General Permits, visit the Army Corps of Engineers Walla Walla District Regional General Permits webpage.

§401 Certifications Issued for Activities Requiring Individual Certification

CountyCorps Permit # / Project NamePermit TypeApplicant NameWater Body ImpactedIssuance Date
AdaNNW-2008-139-B01 - Piping of Ballantyne Ditch and filling of canal over pipe NWP 14Ada County Highway DistrictBallantyne Ditch02/22/11
AdaNNW-2008-141 - Discharge of 33,840 cubic yards of fill into 3.62 acres of cattail and sedge meadow wetlands and 1.55 acres of wetland ditches to construct residential roads, buried utilities, and commercial and residential building padsIndividualHarris Family Limited Partnership, LLCPenitentiary Canal, unnamed ditches and wetlands tributary to the Boise River05/25/11
AdaNNW-2010-658-B02 - Replacement of two-lane bridgeNWP 14Idaho Transportation DepartmentWillow Creek02/08/11
AdaNNW-2011-191-B03 - Removal and replacement of an existing bridge structure with a new precast concrete box structure including an 8 foot wide extension to the west end of the new structure to facilitate addition of a future sidewalkNWP 14Ada County Highway DistrictNorth Slough06/27/11
AdaNNW-2011-197-B03 - Extension of an existing 36” culvert approximately 10 feet utilizing an 84” concrete manhole in Drain “A” to provide for a sidewalk connection on the north side of Boise AvenueNWP 14Ada County Highway DistrictDrain "A"06/27/11
AdaNWW-2011-205-B03 - Extension of existing bridge structure on the south side of State Street to provide a bike lane and sidewalk across Dry CreekNWP 14Ada County Highway DistrictDry Creek07/07/11
AdaNNW-2007-251-B02 - Development of a new four-lane limited access divided highway between US 20/26 and SH-44 that includes installation of a new bridge over the Boise River and multiple crossings of irrigation conveyancesNWP 14, 16 and 27Idaho Transportation DepartmentBoise River and multiple crossings of irrigation conveyances, including Phyllis Canal, Eureka Canal, Little Pioneer Canal, Lawrence Kennedy Drain and Pollard Drain11/02/11
AdaNNW-2011-557-B03 - Installation of 10-foot by 4-foot by 26-foot pre-cast concrete box culvert to expand the Boise River Greenbelt as part of the Harris Ranch multi-use development projectIndividualHarris Family Limited Partnership, LLCWarm Springs Creek12/08/11
AdaNNW-2007-1250-B01 - Driveway construction and installation of sanitary sewer and water pipelines which will involve open trenching through lateralNWP 12, 14CenterCal Properties, LLCStokesberry Lateral12/08/11
AdaNNW-2011-597-B03 - The Hyatt Wetlands Decentralization Stormwater Treatment Demonstration ProjectIndividualCity of Boise Parks & RecreationWarm Springs Creek (a.k.a. Hyatt Hidden Lakes Reserve)01/23/12
AdaNWW-2012-070-W03 - Drain relocation and alignment along Interstate 84.NWP 14David W. TurnbullPurdam and Taylor Drain, Kennedy Lateral 04/23/12
AdaNWW 2012-172-B01 - Abandonment of existing stormwater outfall and construction of a new re-aligned outfall NWP 12Ada County Highway DistrictBoise River05/17/12
AdamsNNW-2011-189-B03 - Removal of existing 36”x 60” metal arch pipe and installation of 12’ precast concrete box culvertNWP 14Payette National ForestYellow Jacket Creek06/27/11
AdamsNWW-2011-204-B01 - Removal and disposal of a 3' x 5' arch culvert and the installation of a precast concrete box culvert in Dewey Creek to provide a summer alternative route due to washouts on Forest Road 50172NWP 14Payette National ForestDewey Creek07/07/11
AdamsNWW-2011-245-B03 - Removal and disposal of twin 36-inch metal culvert pipe and installation of a new 72-inch corrugated metal pipe in Mill Creek northeast of Council, IdahoNWP 14Payette National ForestMill Creek07/07/11
AdamsNNW-2011-308-B03 - Replacement of riprap protected slope(s) that were washed out during the floods which occurred in the spring of 2010NWP 14Payette National Forest/William PerryEast Fork Weiser River08/29/11
BlaineNWW-2010-575-B03 - Linear Transportation ProjectNWP 14Ketchum Ranger StationAdams Gulch Creek01/06/11
BoiseFS-2800-5 - Certification Decision for USFS Plan of Operations Approval for CuMo Exploration Project on National Forest System LandsCGP/MSGPMosquito Consolidated Gold Mining LTDGrimes Creek06/16/11
BoiseNNW-2005-26-00141 - Removal of twin culverts and associated fill material and conversion of crossing to a natural fordNWP 14 Mosquito Consolidated Gold MinesGrimes Creek 02/08/11
BoiseNNW-2010-641-B02 - Removal of pipe and construction of free span concrete girder bridgeNWP 14, 16 and 27Idaho Transportation Dept. Five Mile Creek02/08/11
BonnerNWW 2010-664-C03 - West Bonner Water and Sewer ProjectNWPWest Bonner Water and Sewer DistrictUnnamed tributary to Pend Oreille River05/24/11
BonnerNWW 2011-116-C09 - Gauzza-Westmond Subdivision RoadNWPGeorge GauzzaHickman Creek05/27/11
BonnevilleNWW-2005-3300114 - Extension of Public Utilities, Storm Drainage, Construction of BridgeNWP 12, 14Larry Reinhart (Mountain River Engineering, authorized agentSidehill Canal01/31/11
BonnevilleNWW-2009-646 - Palisades Dam Security Enhancement Bridge ProjectNWPMark Arana, U.S. Bureau of ReclamationSouth Fork Snake River06/02/11
CanyonNNW-2010-619-B03 - Placement of 30 linear feet of 24-inch concrete culvert pipe on Lateral 5.3NWP 14The Berry RanchLateral 5.301/11/11
CanyonNWW-2011-262-B03 - Removal of an existing concrete structure and replacement with a new precast concrete structure of similar width and height over the Highline Canal including rerouting of an existing irrigation pipe and screw gate and storm water improvements.NWP 14Ada County Highway DistrictRidenbaugh Canal07/18/11
CanyonNWW-2012-00122 - Culvert extension in A-DrainNWP 14City of CaldwellA-Drain04/12/12
CaribouNWW-043200012 - Blackfoot Bridge MineIndividualP4 Production, LLCUnnamed tributary to the Blackfoot River and wetlands 05/04/11
CaribouNWW-2011-00138-101 - Northwest Pipeline Highway 30 Pipeline Replacement ProjectNWP 12Dave Lof, NW Pipeline GP (Northwest)Wetland ponds approximately ½ mile north of Alexander Reservoir05/06/11
CassiaNWW-2010-508-B03 - Construction of 3 fords for livestock access, trenching an irrigation line, and installing rock riprapNWP 14William LoughmillerCassia Creek 03/07/11
ClearwaterID-0028444 - Dworshak Reservoir Nutrient Enhancement Pilot ProjectNPDESArmy Corp of EngineersDworshak Reservoir07/26/11
CusterNWW-00568-I02 - Culvert installationNWP 14John PowersUnnamed lateral off of the Swauger Ditch03/20/12
ElmoreNWW-2010-00537-B01 - Replacement of a 36-inch culvert where Forest Road #113 crosses Pierce Creek with a prefabricated modular steel bridge to address road maintenance concerns and provide for aquatic organism passage upstream.NWP 14, 27Boise National Forest/Stephaney M. ChurchPierce Creek10/14/11
ElmoreNWW 2012-00022-B01 - Culvert installation in Ryegrass Creek NWP 12Terna EnergyRyegrass Creek02/22/12
ElmoreNWW-2012-26-B03 - Culvert and bridge installationNWP 14Terna EnergyCold Springs Creek and four unnamed tributaries03/02/12
FremontNWW-2011-00556-I02 - Culvert removal and bridge installationNWP 14Harriman State ParkBig Bend and Antelope Creeks03/20/12
GemNWW-2010-99-B03 - Installation of 60-inch ADS culvert pipe to gain additional access to drinking water treatment plantNWP 14City of EmmettSand Hollow Canal05/09/11
GoodingNWW-2010-390-B03 - Construction of pipelines to carry influent spring waterNWP 12White Springs Trout FarmUnnamed Spring discharges into the Snake River09/22/11
IdahoNWW-2010-632-B03 - Linear Transportation Project; Bridge ReplacementNWP 14Nez Perce National ForestMill Creek01/11/11
IdahoNWW-2011-385-B03 - Little Slate Creek Tributary Culvert Removal and Pipe InstallationNWP 14Nez Perce National ForestLittle Slate Creek09/09/11
KootenaiNWW 2011-090-C09 - Avista Spirit LakeNWPAvista CorporationSpirit Lake05/03/11
LincolnNWW-2008-341-B02 - Stratton Canal Bridge ReplacementNWP 14Ron Holland, Richfield Highway District / Aaron L. Wert, Riedesel Engineering, Inc.Stratton Canal02/07/11
MinidokaNWW 2007-00397-I01 - Minidoka Dam Spillway Replacement ProjectNWPU.S. Department of Interior, Bureau of Reclamation, Upper Snake Field Office, Burley IdahoSnake River (from Minidoka dam to Heyburn/Burley Bridge) and Lake Walcott05/27/11
Nez PerceNWW-2010-213-W04 - Dock extension and the removal and relocation of an existing mooring dolphin to a location approximately 115 feet west of the expanded dock.404 Dredge and FillPort of LewistonClearwater River, Lower Granite Dam Pool02/06/12
PayetteNWW-2011-532-B03 - Installation of 72" diameter culvert to provide access to the proposed Hardin Sanitation siteNWP 14Hardin Sanitation, Inc.Lower Payette Waste Ditch12/07/11
TetonNWW-2011-356-B02 - Replacement of culverts and addition of turn lanes for traffic safetyNWP 14Nicholle Braspennickx, US Army Corps of EngineersUnnamed irrigation ditch near Dry Creek09/29/11
Twin FallsNWW-2009-330-B02 - City of Twin Falls Lateral 42 PipingNWP 12, 14Jacqueline Fields, City of Twin Falls, and Aaron Wert, Riedesel Engineering, Inc. Lateral 42 to cross Lateral 41-A and discharging into the Perrine Coulee and then into the Middle Snake River01/26/11
ValleyNWW-2010-49-B03 - Replacement of timber bridges with pre-cast concrete bridge structuresNWP 14Valley County Road Dept.East Fork South Fork Salmon River06/27/11
ValleyNWW-2011-52-B03 - Replacement of corrugated metal culvert with a treated timber bridgeNWP 14USDA Boise National ForestMormon Creek 03/14/11
ValleyNWW-2011-50-B03 - Replacement of timber bridges with pre-cast concrete bridge structuresNWP 14Valley County Road Dept.Lick Creek and Duck Lake06/27/11
ValleyNNW-2010-428-B03 - Replacement of existing, deteriorated timber bridge with pre-cast concrete bridge structure along USFS roadwayNWP 14Valley County Road Dept.Profile Creek06/27/11
ValleyNNW-2011-168-B03 - Removal of two existing corrugated metal pipe culverts which are presently a barrier to aquatic organisms and replaced with 12’ bottomless concrete box culvertNWP 14Boise National ForestTennessee Creek06/27/11
ValleyNNW-2010-268-B01 - Construction of a 71" x 47" x 30" arch culvert in a high flow channel, fill of roadway, and installation of a new 80' pre-fabricated bridge with associated wetland disturbance replacing an existing drivable fordNWP 14Payette National Forest/William PerryBig Creek08/16/11
ValleyNNW-2009-223-B02 - Johnson Creek Airport Bridge replacementNWP 14Idaho Transportation DepartmentJohnson Creek01/23/12
ValleyNWW-022300570-B02 - Removal of existing concrete bridge and construction of a new three-lane concrete girder bridge. NWP 14Idaho Transportation DepartmentNorth Fork Payette River02/08/12

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Staff Contact

Water Quality Standards Analyst
Miranda Adams
DEQ State Office
Water Quality Division
1410 N. Hilton
Boise, ID 83706
(208) 373-0574
miranda.adams@deq.idaho.gov

Related Pages

§401 Certification

Water Quality Permitting in Idaho