Sample Projects_- Design
Bread Springs School Renovations and New School Site, Navajo Nation, South Of Gallup, NM
Zia provided consulting services for drainage investigations, floodplain mapping, environmental consulting and investigations, groundwater hydrology analysis and biological investigations for the Bread Springs School Site Improvements south of Gallup, New Mexico.
Zia’s initial project scope included drainage investigations, identification of existing floodplain extents and hydraulics structures recommendations/design for the existing school site, groundwater hydrology review of the existing water system and water availability and water system recommendations.
(Existing School Site With Major Arroyo Crossing To North Across Unsafe Bridge)
Based on these preliminary investigations and design, it was decided by BIA and Navajo Nation to identify a new school site as opposed to expand the existing site. Zia was then contracted to conduct new investigations to include drainage investigations of an approximate 320 acre parcel and new access road, floodplain mapping, groundwater hydrology review of available water resources at the new school site, a Phase I Environmental Site Assessment (Phase I ESA) of the 320 acre parcel, a biological investigation, and a NEPA Environmental Assessment of the proposed new project.
(Potential New School Site)
Navajo Bridges Replacement Projects – Navajo Nation, AZ & NM
Zia provided surface hydrologic and hydraulic systems analysis and grading and drainage systems design for thirteen bridge replacement sites located throughout the Navajo Nation. Ten of the sites are in Arizona and three of the sites are in New Mexico.
Work included hydrologic and floodplain modeling using HEC HMS computer program (replacing the previous HEC-I model), statistical analysis and review of existing rainfall / runoff gage data of the USGS and Navajo Nation gage systems, hydraulics systems analysis utilizing HEC-RAS computer model (replacement the previous HEC-II program), scour analysis of proposed bridge systems using HEC-18 methods (as required by FHWA), and design sizing and costing of proposed replacement structures. Methodologies followed practices of the Arizona Department of Transportation (ADOT) and New Mexico State Highway and Transportation Department (NMSHTD), Federal Highway Administration, Army Corps of Engineers and NRCS as applicable.
(Existing Rio Puerco Bridge)
Economics analysis has included feasibility review of at least three options for each site from the construction cost and operation / maintenance standpoints. Cost estimating was conducting utilizing Means estimating software modified with recent local bid costs for the region obtained from the ADOT and NMSHTD.
Watershed areas varied between 3 miles in size to more than 1500 miles in size. Analysis has also included design recommendations for minimizing scour, erosion and roadside runoff. Design efforts have included establishment of site grades, design of levees and embankment systems, gabions blankets and rundown systems.
Las Alamedas Development Project, Las Cruces, NM
Zia provides survey platting, site roadway and utilities master planning, hydrologic analysis, floodplain mapping, and hydraulics analysis for a 3000-acre, master-planned community along the eastern edge of the City of Las Cruces. The work involves analysis of three of the major watersheds impacting the City of Las Cruces, and includes detailed subdivision design along with related hydraulics systems design and analysis for the first 600 acres of the development. The project won a major national planning award for innovative design and layout.
Legends West Subdivision (Phases I - IV), Las Cruces, NM
Zia prepared construction plans and specifications for the proposed single family residential subdivision (zoned R1a) targeted for providing housing which is generally affordable to medium income and lower medium income families. The project is proposed on an area which is currently utilized for farming and therefore, the land area is laser leveled with no existing runon from offsite areas onto the project areas nor any runoff from the project area to surrounding lands except for convenience to planned drainage structures. Anticipated average house size is expected to be 1,500 to 1,800 square feet with average percent impervious area of each lot estimated to be approximately 60% (including streets, driveways, sidewalks, houses, and the pad areas).
Rancho Lomas Subdivision Phase II, Las Cruces, NM
Zia prepared construction plans and specifications the proposed single-family residential subdivision. This 27.3-acre subdivision is being planned to provide 37 lots (minimum of one half acre), with generous building pads and spectacular views. The minimum lot size is half of an acre and the lot sizes vary from approximately 0.502 to 1.12 acres. There is to be a single building pad for each lot, affording level space for generously sized homes, garden areas, patios, parking and other improvements. The pads are sited to take advantage of the views from this property. The area required extensive hydrologic and hydraulic analysis, and included stormwater, drainage, grading, gas, water and sewer, roadway design, and street lighting.