Post-Construction Storm Water Control Measure Permit
When is the Post-Construction Storm Water Control Measure Permit Required?
If disturbance on site is greater than 1 acre or is part of a common plan of development where more than 1 acre will be disturbed, a Post-Construction Storm Water Control Measure permit is required.
All residential plats that have received a plat number prior to April 1, 2016, are grandfathered.
All commercial plats on the below-attached document are grandfathered as long as the additional requirements listed on the document are met. (Please be aware this list is subject to change)
|Land Use Type||Target Impervious Cover Percentages|
|Single Family Residential||30%|
Target Impervious Cover
Provided is a table showing the target impervious cover which would trigger additional mitigation. If the project is within the target impervious cover then a no cost permit is required. If the project is over the target impervious cover, a permit is required.
If a WPAP (Water Pollution Abatement Plan) or CZP (Contributing Zone Plan) is required for the site, a permit is required, but no additional mitigation is required. The storm water control measures to be implemented for the WPAP/ CZP will be the measures permitted. All permitting submittal requirements will stay the same. (See Below) Since the BMPs to be permitted have already been reviewed by TCEQ for the WPAP/CZP only the $50 application fee will be assessed. The $200 review fee will not be assessed.
The permit has a two (2) part approval:
Each part has its own submittal requirements for the permit.
The Pre-Construction section must be approved prior to construction; however, a Pre-Construction approval does not exclusively allow for construction to begin. Other Bexar County permits may be required from Developmental Services, Environmental Services, or Fire Marshal.
- Application Signed (PDF)
- Mitigation Scoring Sheet (see Post-Construction Manual (PDF) for Instructions)
- BMP Calculations
- BMP Design
- BMP Location Map
- WPAP/CZP Approval Letter (If applicable)
- Approved COSA Tree Permit
- Payment into Storm Water Mitigation Fund (If applicable)
- Permit Fee ($250: $50 Application fee + $200 review)
The review process for the Pre-Construction section will be triggered when all of the above submittals are received by our office. The review time is 30 days.
The Post-Construction section must be approved to complete the permit. This section cannot be approved until all BMPs have been constructed, stabilized and in working condition along with a record of maintenance affidavit recordation.
- As Built Design
- Engineer Certification of BMPs
- Record of Maintenance Recordation
- Certified Maintenance Provider
The review process for the Post-Construction section will be triggered when the above submittals are received by our office. Once received, an inspector will go out to the site to visually confirm the locations of the BMPs and collect photographs of the BMPs for our records.
After final approval of the permit, the owner is expected to begin routine maintenance and inspection of the BMPs permitted. Quarterly maintenance reports are to be sent to Bexar County. If maintenance lapses for over a year or if) quarterly reports are not received, a violation letter will be sent and a renewal permit with an engineer certification will be required to bring the site back into compliance.
Maintenance Provider Certification
Those who will be providing maintenance for the permitted BMPs will be required to have a certification. The current certification that is approved by Bexar County is being provided by the San Antonio River Authority (SARA).
A renewal permit is required when:
- Annual Renewal of Current Permit
- Change in Ownership
- Violation of Maintenance
Annual Renewal of Permit
An annual renewal of the permit is required. There is a $50 permit fee to renew and the renewal permit application should be filled out and submitted to our office along with the final quarterly report and a certification from the maintenance provider that the permitted BMPs are still functioning as intended.
Change in Ownership
A renewal permit is required when there is a change in ownership. There is a $50 permit fee and the renewal permit application should be filled out. Maintenance provider contract will be required. No additional submittals are required.
Violation of Maintenance
A renewal permit is required when there is a lapse or continued violation in maintenance. There is a $250 permit fee and the renewal permit application should be filled out. Maintenance provider contract will be required along with an updated engineer certification of the BMPs on site.