MCM 2 : POST-CONSTRUCTION STORMWATER CONTROL MEASURES I .
Areas of New Development and Significant Redevelopment
The City of The City of Arlington ’ s Unified Development Code ( UDC ), formerly the Subdivisions Ordinance , acts as the regulatory mechanism for the enforcement of post-structural stormwater controls . The UDC specifies in Article 6 , Section 6.1 , H , that one of the purposes of the regulation is to : “ minimize the pollution of streams and ponds ; to provide for the adequacy of drainage facilities ; to control stormwater runoff ; to minimize erosion and siltation problems , to safeguard the water table ; to encourage the wise use and management of natural resources ; and enhance the stability and beauty of the community and the value of the land .”
The UDC also provides that each subdivision ( development ) shall provide “ adequate public facilities ” that include the drainage necessary to serve the proposed development ( see UDC , Article 6 , Section 6.2.1 ). Drainage and stormwater facilities are adequate when : ( 1 ) stormwater runoff attributable to new development or redevelopment complies with the minimum standards of the UDC and the Design Criterial Manual ( DCM ); and ( 2 ) to the maximum extent practicable , permanent BMPs , as described in the DCM , maintain the predevelopment characteristics of any natural creek that ultimately receives stormwater runoff from the development . That is , “ designs for development shall manage stormwater in a manner that protects and / or improves stormwater quality by addressing the development ’ s potential to cause erosion , pollution , siltation , and sedimentation in the MS4 and natural creeks . The goal is to maintain after development , to the maximum extent practicable , the predevelopment characteristics of stormwater runoff from the development . It is the developer ’ s responsibility to ensure that designs for the development meet the stormwater management requirements of adopted City Codes ” ( see UDC , Article 6 , Section 6.5.1 , D .)
The Design Criteria Manual was adopted by City Council Ordinance in June 2003 and went into effect on August 12 , 2003 . Various stormwater revisions made between 2003 and 2010 were described in past Annual Reports . Stormwater related revisions to the Design Criteria Manual including the Public Improvements submittal process , stormwater standards , permit process and terminology , definitions and regulations for public improvements and street appurtenances were adopted in January , April , and June of 2010 respectively . Most recent revisions to the DCM were made between 2014 and 2019 with final adoption of all changes in October 2019 . The City continues to apply the Design Criteria Manual requirements to new developments .
II .
Flood Control Projects The City completed the following drainage and / or erosion projects during the reporting period :
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2015 Miscellaneous Drainage Improvements ( Landover Hills , Ticino Valley , Del Rio ) – drainage improvements to alleviate residential flooding ( Landover Hills ), nuisance maintenance conditions ( Del Rio ), and excessive intersection ponding due to poorly installed culverts ( Ticino Valley ). 2015 Residential Rebuild , Phase II / Tower Drive Drainage Improvements – participation in residential street rebuild project to construct associated drainage improvements to alleviate residential flooding . 2017 Bridge Maintenance Phase 1 - Annual contract to complete bridge maintenance identified by bridge inspections . Location included in Phase 1 was Hardisty .
� 2017 Miscellaneous Erosion Projects Phase 1 - Erosion maintenance in earthen channels and ditches at various locations including the Arlington Municipal Airport , Collins and Debbie , and Collins and MacGregor .
� JC-9 Erosion Repair – Erosion maintenance to protect a street .
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