§ 25-7-66. SUPPLEMENTAL REQUIREMENTS FOR DEVELOPMENT APPLICATIONS IN CERTAIN PLANNING AREAS.

(A)

The requirements of this section supplement the criteria in Section 25-7-61 ( Criteria for Approval of Development Applications ) for development within the area bound by Oltorf to the north, the Union Pacific railroad tracks to the east, Highway 290/Ben White Boulevard to the south, and South Lamar and Manchaca Road to the west.

(B)

The director may determine that a development will have no adverse flooding impact to other property, as required by Section 25-7-61(A)(5) ( Criteria for Approval of Development Applications ), only if the director finds that:

(1)

for development that will alter or impact stormwater flow, the determination is substantiated by detailed hydraulic and hydrologic analyses, submitted by a licensed engineer under seal, that models downstream impacts, within a scope deemed appropriate by the director based on the scale and intensity of the development; and is submitted by a licensed engineer under seal; and

(2)

existing peak flow rate will be reduced by at least 10% for proposed development or redevelopment that would exceed 45% impervious cover, as calculated based on gross site area.

(C)

In addition to all other applicable requirements, a development application must comply with the requirements of this section.

(1)

Except as provided in Paragraph (C)(2), an application for development of a new or existing duplex, single-family attached, two-family residential, secondary apartment, or condominium residential use must include scaled drawings and a grading plan identifying:

(a)

finished floor elevations;

(b)

driveway and sidewalk locations;

(c)

building footprint; and

(d)

location of all stormwater discharge.

(2)

The requirements of Paragraph (C)(1) do not apply to development of a single-family residential use on a platted lot if impervious cover will not exceed 45%, as calculated based on gross site area.

(3)

For development of a single-family residential subdivision:

(a)

the construction plans for subdivision infrastructure must include a concept plan identifying building footprints and the location of sidewalks and driveways for each lot within the subdivision; and

(b)

a grading plan for each lot, consistent with the subdivision construction plans, if applicable, must be provided at the time of development and building permit review.

(D)

The requirements of this section do not:

(1)

affect implementation of the Regional Stormwater Management Program, as prescribed by the Drainage Criteria Manual; or

(2)

prohibit the director from waiving detention requirements, as prescribed in the Drainage Criteria Manual, if an applicant provides offsite improvements that result in an overall improvement of flooding conditions within the affected watershed.

Source: Ord. No. 20141211-200, Pt. 1, 12-11-14 ; Ord. No. 20171214-096 , Pt. 2, 12-14-17.

Note— Part 3 of Ordinance No. 20141214-096 states, "The City Manager is directed to adopt administrative rules that are determined to be necessary for implementation of this ordinance. The requirements of this ordinance control in the event of a conflict with the Drainage Criteria Manual, including but not limited to § 1.2.2(G), the Environmental Criteria Manual, or other administrative rules."

Part 6 of Ordinance No. 20171214-096 states, "This ordinance expires on December 14, 2019."