Gowan Outfall – Lone Mountain Branch

Project Type: Flood Control Facility
Construction Budget: $8,986,807
Client:
  • City of North Las Vegas (Phase I)
  • City of Las Vegas (Phase II)
Service Performed:
  • Drainage Analysis/Design
  • Hydrology
  • Hydraulics
  • Utility Coordination
  • Environmental Support
  • Right-of-Way
  • Survey
  • Structural Engineering
  • Roadway and Traffic
  • Cost Estimates
  • Specifications
  • Bid Phase Support
  • Construction Documents

Phase I, Decatur to Gowan Outfall Channel
Project consisted of preliminary engineering, final design, bid phase support and construction support services. The improvements consisted of approximately 1½ miles of reinforced box culvert, appurtenant flood control facilities and required utility relocations. Preliminary engineering phase included evaluation of alternative alignments, hydrologic and hydraulic analyses to establish design flows for the box culvert and related structures. A final design services phase consisted of the preparation of construction documents for the project including cost estimates, specifications and drawings. Coordination with subconsultants and support teams including geotechnical, survey, right-of-way, structural, and environmental groups as well as coordination with local, regional, and state agencies was required for review and approval. Performed right-of-way services including right-of-way mapping, alignment analysis to minimize right-of-way takes, identification of property ownership and constraints, and preparation of legal descriptions for easements.

Phase II, Rancho to Decatur
Project included preliminary engineering, final design, bid phase support and construction support services. Facilities include concrete transition and junction structures, inlet laterals, 1,330 lf of 6-ft by 6-ft RCB, 4,790 lf of 8-ft by 6-ft RCB, 2,240 lf of 12-ft by 6-ft RCB, 1,140 lf of 14-ft by 6-ft RCB, and 1,810 lf of 14-ft by 7-ft RCB. Includes hydrology (existing/interim/future), hydraulics, utility coordination, environmental investigation, right-of-way, transportation, traffic, water, wastewater, survey, geotechnical, and structural engineering, Section 8 analysis, USACE 404 permitting, design of access ramps and covers, preparation of construction documents, and construction support. Performed right-of-way services including right-of-way mapping, alignment analysis to minimize right-of-way takes, identification of property ownership and constraints, and preparation of legal descriptions for easements. Project involved coordination with CNLV and NDOT, and preparation and submittal of an NDOT encroachment permit.