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Clean Water Act discharge permit · NPDES IDR10C05E

MANDALAY RANCH SUBDIVISION NO. 4, Caldwell, ID: NPDES IDR10C05E discharge permit, effluent exceedances, inspections, penalties

MANDALAY RANCH SUBDIVISION NO. 4, held by Lennar Homes, LLC, holds NPDES permit IDR10C05E, which discharges to Mason Creek. EPA’s file records it issued December 16, 2021 and expiring February 16, 2022.

MANDALAY RANCH SUBDIVISION NO. 4, Caldwell, Idaho: Coverage under a general permit IDR10C05E, held by Lennar Homes, LLC; Construction stormwater; Administratively continued (past its expiration date and still in force until reissued); issued December 16, 2021, term to February 16, 2022; discharges to Mason Creek.

Idaho holds 3,630 Construction stormwater coverages of this permit type in EPA’s file; 547 were issued before IDR10C05E. Lennar Homes, LLC holds 3 permits in Idaho.

Other permits held by Lennar Homes, LLC

Coverages issued nearest IDR10C05E

MANDALAY RANCH SUBDIVISION NO. 4 among its neighbors

EPA’s permit file holds 360 discharge permits in the Mason Creek subwatershed (HUC 170501140407), IDR10C05E among them. Its county holds 377, 2 of them major permits; IDR10C05E is a minor permit.

Other permits in the Mason Creek subwatershed (HUC 170501140407)

What the register holds for MANDALAY RANCH SUBDIVISION NO. 4: its NPDES ID, its permit type and status, its dates, its address in Caldwell, Idaho, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES IDR10C05E.

Identity

Facility as filedMANDALAY RANCH SUBDIVISION NO. 4
Permittee as filedLennar Homes, LLC
NPDES IDIDR10C05E
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedDecember 16, 2021
Expiration dateFebruary 16, 2022
AddressCaldwell, ID 83605
Receiving waterMason Creek
Receiving water impaired303(D) Listed
SubwatershedMason Creek (HUC 170501140407)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES IDR10C05E.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IDR10C05E.

Inspections

EPA’s inspection file holds no inspection for NPDES IDR10C05E.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES IDR10C05E.

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One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IDR10C05E.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

MANDALAY RANCH SUBDIVISION NO. 4 is one of 308 storm water construction permits on EPA's NPDES register in Canyon County, and it sits among 360 NPDES permits in the Mason Creek subwatershed. The permit records zero pollutants under a numeric limit and zero pollutants with an effluent exceedance, and 0.0% of the 308 Canyon County storm water construction permits have a violation on file.