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City of McAllen(3 more)

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Field	Local City of McAllen City of McAllen Public Works / Engineering Department
Permit
Permit / Authorization	Drainage / Grading Permit
Submit To	City of McAllen Public Works / Engineering Department
Lead Time	Plan review typically 2–4 weeks
Application Method	Submit via City of McAllen permitting portal or in person at 1300 Houston Ave., McAllen, TX 78501
Fee	Contact agency for current fee schedule
Water Quality
Impervious Cover Limit	No citywide impervious cover cap; drainage infrastructure must accommodate design storm flows; FEMA floodplain areas impose elevation and fill restrictions
On-Site Treatment Required	No
Detention Required	Yes — Detention required to attenuate post-development peak flows to pre-development levels for 2-, 10-, 25-, and 100-year storms per McAllen Drainage Criteria Manual; flat Rio Grande Valley topography requires careful hydraulic routing
Turbidity / Discharge Standard	No numeric NTU limit; discharges must comply with TCEQ TXR150000 and not degrade Rio Grande or Arroyo Colorado water quality
SWPPP
SWPPP / Local Plan Required	Yes — SWPPP per TCEQ TXR150000; drainage report required for local permit
PE Stamp Required	Yes
Inspections
Inspection Requirements	City of McAllen Engineering Department inspects grading permits at key milestones. Hurricane season requires heightened BMP maintenance. Final stabilization inspection required before permit closeout.
Inspector Qualification	No city-specific certification required beyond TCEQ SWPPP requirements
Design & Zones
Local Design Manual	City of McAllen Drainage Criteria Manual
Special Overlay Zones	FEMA Special Flood Hazard Area — Rio Grande and Arroyo Colorado Floodplains, International Boundary Zone (Rio Grande), Arroyo Colorado / South Texas Water Supply Zone