1. THE UPGRADE OF 33.7 KM OF NATIONAL ROUTE N2, BETWEEN MTUNZINI TOLL PLAZA (SECTION 28, KM 42.7) AND EMPANGENI T-JUNCTION (SECTION 29, KM 13.0)
CONTRACT NUMBER: NRA N /1
CLIENT: SOUTH AFRICAN NATIONAL ROADS AGENCY SOC LIMITED
CONSULTANT: UWP CONSULTING (PTY) LTD
CONTRACTOR: CONCOR INFRASTRUCTURE
PRESENTED BY: STEWART WILSON (RESIDENT ENGINEER)

2. OVERVIEW OF THE CONTRACT
Went to tender: Design (2010) Construction (September 2015)
Tender Awarded: December 2015
Handover of project to contractor: February 2016
Project completion date: March 2019
Contract Duration: 37 months
Total CPG Target: 18%
Estimated Contract Value: R900 million

3. PAVEMENT DESIGN FOR THE NEW CARRIAGEWAY
Surfacing: 20mm UTFC
40mm Continuously graded asphalt wearing course
Basecourse: 80mm Asphalt Basecourse (BC3)
Upper Subbase: 150mm C3 Stabilised Crushed Gravel
Lower Subbase: 150mm C3 Stabilised Crushed Gravel
Upper Selected Layer: 150mm G7 Natural Gravel
Lower Selected Layer: 150mm G9 Natural Gravel

4. CONTRACT PARTICIPATION GOALS
Targets
Achieved
Target Area
Labour 6%
6,36%
352/494
SCD
12%
7,9%
19/29
Total
18%
14,26%

5. TRAINING Students: 4 interns with contractor 4 interns with engineer
1 OHS intern
12 ‘go for gold ‘ students
Programme Generic (R25 000)
NQF 3(R )
NQF 4 (R )
SMME (R )
Progress 6 of 8 Modules – R

6. RIVER BRIDGES Mlalazi River Bridge (B1085A)
Four span structure with 29.5m long spans
Simply supported precast, prestressed concrete beam deck and 3 internal wall type piers
Using a combination of pad type footings and 32 x 900mm diameter bored piles, ranging in depths from 16m to 23m

7. RIVER BRIDGES Umhlathuze River Bridge (B484A)
Eight span structure with 29m long spans
Simply supported prestressed beam and slab deck construction with 7 internal wall type piers
Piers founded on 70 x 900mm diameter bored piles to depths between 45m to 62m

8. OVERPASSES & UNDERPASSES
Ridge Bridge (B1416)
Windy Ridge Bridge (1086)
Port Durnford Bridge 1 (B1087)
Mzingwenya Agricultural Overpass (B1090)
Underpasses
Port Durnford Bridge 2 (B1088A)
Sugar Mill Bridge (B485)
CFA Piling at Mzingwenya Overpass
Mzingwenya Overpass
Removing Jackspan

9. MAJOR BOX CULVERTS
16 Major box culverts with numerous smaller box culverts that require lengthening

10. FACTS AND QUANTITIES Mass of reinforced concrete
Major Structures: m3 ( tons)
Minor Structures: m3 ( tons)
Total mass of reinforced concrete: m3
Length of piles
600mm diameter CFA piles: 0.38 Km
900mm diameter bored piles: Km
Total length of piles: 4.74 Km
Mass earthworks: m3
Asphalt to be paved: tons