Basic Assessment Proposed N3 Road Upgrades Between Durban and Cedara Kwazulu-Natal Capacity Upgrades to the N2
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SANRAL BASIC ASSESSMENT PROPOSED N3 ROAD UPGRADES BETWEEN DURBAN AND CEDARA KWAZULU-NATAL CAPACITY UPGRADES TO THE N2 (SOLOMON MAHLANGU TO SOUTH OF UMGENI RD I/C), INCLUDING EXPANSION OF EB CLOETE AND SOLOMON MAHLANGU INTERCHANGES, AND THE N3 (EB CLOETE TO PARADISE VALLEY) INCLUDING PROVISION OF TEMPORARY ACCESS FOR CONSTRUCTION BELOW WESTVILLE AND PARADISE VALLEY VIADUCTS PRELIMINARY DESIGN CONTRACT: PARADISE VALLEY TO CEDARA NRA N003 -023 -2010/1ES DETAIL DESIGN PROJECT NO DESCRIPTION SERVICE PROVIDER EB Cloete (including portion of N2 N.003-010-2017/1 North and N3 West) (N3: km 9.06-km SNA 11.8) (N2:km 117.2-km 20.7) N.002-250-2009/2D2N2 Upgrade of Solomon Mahlangu IC SNA Westville Viaduct (Km 11.8) to Paradise Valley (Km 17.5) including N.003-010-2017/2 SNA Westville and Paradise Valley viaduct access roads Assessment of Vegetation Ecology Updated Specialist Report Report prepared for: Report prepared by: SANRAL SOC LIMITED ACER (Africa) Environmental Consultants PO Box 100401 P O Box 503 Scottsville MTUNZINI 3209 3867 November 2016 UPDATED VEGETATION SPECIALIST STUDY REPORT I PROPONENT Proponent: South African National Roads Agency SOC Limited Contact person: Busi Mlambo Physical address: 58 Van Eck Place, Mkondeni, Pietermaritzburg Postal address: PO Box 100410, Scottsville Telephone: 033 392 8100 Fax: 033 386 6284 Email [email protected] INDEPENDENT ENVIRONMENTAL CONSULTANT Consultant: ACER (Africa) Environmental Consultants Contact person: Ashleigh McKenzie Physical address Suites 5&6, Golden Penny Centre, 26 Hely Hutchinson Road, Mtunzini Postal address: PO Box 503, Mtunzini, 3867 Telephone: 035-3402715 Fax: 035-3402232 Email [email protected] INDEPENDENT VEGETATION ECOLOGY SPECIALIST Consultant: ACER (Africa) Environmental Consultants Contact person: Mr Barry Patrick Postal address: PO Box 503, Mtunzini, 3867 Telephone: 083 272 9905 Fax: 035-3402232 Email [email protected] DECLARATION OF INDEPENDENCE • I, Barry Patrick, hereby declare that I acted as the independent specialist in this application; • I do not have and will not have any financial interest in the undertaking of the activity, other than remuneration for work performed in terms of NEMA and the Environmental Impact Assessment Regulations, 2014; • I do not have and will not have a vested interest in the proposed activity proceeding. Signed… ……………………. Date……16 November 2016………………….. SANRAL CAPACITY UPGRADES TO THE N2 (SOLOMON MAHLANGU TO SOUTH OF UMGENI RD I/C), INCLUDING EXPANSION OF EB CLOETE AND SOLOMON MAHLANGU INTERCHANGES, AND THE N3 (EB CLOETE TO PARADISE VALLEY) INCLUDING PROVISION OF TEMPORARY ACCESS FOR CONSTRUCTION BELOW WESTVILLE AND PARADISE VALLEY VIADUCTS SUMMARY OF UPDATES This report is an updated version of the original 2013 vegetation ecology specialist report. Changes to the original 2013 report largely relate to updates to the main construction activities for the capacity upgrades, updates to the vegetation types and finer scale detail provided by the eThekwini Environmental Planning and Climate Protection Department in terms of their recently completed Systematic Conservation Assessment for the eThekwini Municipal Area. Further field surveys were conducted where the footprint has increased, most notably at the Wandsbeck Road Bridge, Solomon Mahlangu Interchange, and at the Westville and Paradise Valley viaducts where temporary access routes will be created to access the areas beneath the bridges during construction. Updates were made to the vegetation descriptions, important species and potential impacts. Additional mapping was done to improve the finer scale detail provided, additional sensitive areas were identified and additional mitigation was recommended (site specific and general). UPDATED VEGETATION SPECIALIST STUDY REPORT 3 SANRAL CAPACITY UPGRADES TO THE N2 (SOLOMON MAHLANGU TO SOUTH OF UMGENI RD I/C), INCLUDING EXPANSION OF EB CLOETE AND SOLOMON MAHLANGU INTERCHANGES, AND THE N3 (EB CLOETE TO PARADISE VALLEY) INCLUDING PROVISION OF TEMPORARY ACCESS FOR CONSTRUCTION BELOW WESTVILLE AND PARADISE VALLEY VIADUCTS EXECUTIVE SUMMARY This report is an updated version of the original 2013 vegetation ecology specialist report. This is a linear project situated within the eThekwini Metropolitan Municipal Area of KwaZulu-Natal, near the coast of the Indian Ocean. The study area is focused mostly within the existing road reserve and smaller sections outside of existing road reserve on the N2 and N3 toll roads. The section of interest extends along the N3 between Durban and Pinetown, from the EB Cloete Interchange (Spaghetti Junction) to Paradise Valley (M13 interchange). Included also is a section along the N2 between the Recreation and Hilary areas, from Umgeni Road (N2 North) to Solomon Mahlangu Drive (formerly Edwin Swales Drive) Interchange (N2 South). Upgrades to the Wandsbeck Road Bridge, Solomon Mahlangu Interchange, and access roads to allow construction below the Westville and Paradise Valley viaducts are also included. Rehabilitation and upgrading of the National Route 3 (N3) between Durban and Cedara, including a section of the National Route 2 (N2), will involve: Strengthening of the existing pavement structure by means of concrete or asphalt overlays. Widening of the traffic roadway by one or more lanes in each direction via encroachment into the median, road reserve or both. Installation of a concrete median barrier/guard rail barrier where required, separating the carriageways. Widening of existing cuts and fills. Construction of retaining walls where required. Widening and lengthening of underpass structures and culverts. Extension of existing drainage structures (box and pipe culverts). The widening of existing interchanges, ramps and cross roads. The widening of existing bridges (median and edge widening, requiring additional piles, footings and columns, and/or strengthening of existing ones). Deck replacement on existing overpass structures. Deck jacking and abutment replacement on existing overpass structures. The construction of new bridges (overpasses). Demolition of existing overpass structures and construction of (replacement) upgraded overpass structures, where required (please note that demolition will occur only once the new structure has been constructed). Relocation and protection of service infrastructure. Dismantling and re-erection of guard rails. Dismantling and re-erection of signage. During the planning phase, additional land will be acquired by SANRAL where needed. Prior to construction at the Westville and Paradise Valley Viaducts, temporary construction access roads will need to be established to enable plant to access the area beneath the viaducts. With the exception of these viaduct access roads, contractors will make use of existing roads for construction access. No new borrow pits or quarries will be established as materials will be sourced from commercial sources. No batching plants will be established on site (ACER, 2016). During the site visits, a preliminary qualitative botanical survey was undertaken where vegetation types were identified, species composition noted, and vegetation structure recorded. UPDATED VEGETATION SPECIALIST STUDY REPORT 4 SANRAL CAPACITY UPGRADES TO THE N2 (SOLOMON MAHLANGU TO SOUTH OF UMGENI RD I/C), INCLUDING EXPANSION OF EB CLOETE AND SOLOMON MAHLANGU INTERCHANGES, AND THE N3 (EB CLOETE TO PARADISE VALLEY) INCLUDING PROVISION OF TEMPORARY ACCESS FOR CONSTRUCTION BELOW WESTVILLE AND PARADISE VALLEY VIADUCTS Important plant species and sensitive areas of vegetation were noted and opportunities for mitigation of impacts were identified. A brief literature review was undertaken. A specialist report on rivers and wetlands was undertaken by Groundtruth (2013, updated 2016), and consequently accurate wetland and riparian boundaries were not determined in the field during the vegetation assessment. Land use in the study area is urban in nature and dominated by residential settlement, commercial developments and road infrastructure. Due to high levels of development, most of the vegetation remaining within the road reserve, including proposed extensions, is very disturbed. Most of the riparian zones and wetlands are similarly highly disturbed and modified due to development. Nevertheless, limited pockets of better quality natural vegetation are encountered where the road intersects or runs adjacent to some of the steeper valleys and municipal nature reserves. Areas that are important in this regard are Westville Viaduct, Paradise Valley Viaduct, pockets at the Solomon Mahlangu Interchange, and Roosfontein Nature Reserve to a lesser degree. The following provincial vegetation types are affected by the proposed upgrade: KwaZulu-Natal Coastal Belt Grassland (CE), KwaZulu-Natal Coastal Forests : Southern Mesic Coastal Lowlands Forest (CE), Eastern Scarp Forests : Southern Coastal Scarp Forest (LT), and Alluvial Wetlands : Subtropical Alluvial Vegetation (EN). The widening of the N3 will affect several D’MOSS areas and the following eThekwini Municipal Area vegetation types: Eastern Scarp Forest (below the 450 m contour): comprising sections in Good and Intermediate ecological condition. Transitional Forest: comprising sections in Intermediate and Degraded ecological condition. Transitional Thicket: comprising sections in Degraded ecological condition. Transitional Woodland: comprising sections in Intermediate and Degraded ecological condition. Wetland: comprising sections in Intermediate and Degraded ecological condition.