Our tenured staff provides a broad range of engineering services for municipal utility districts. Our experience includes feasibility studies, alternative analyses, district creation, permitting, detailed design, and construction phase services for these districts.

Our Utility District Engineering services encompass the following disciplines:

  • Water Supply, Treatment, and Distribution
  • Wastewater Collection and Treatment
  • Drainage and Flood Control
  • Streets and Roads (where Road Powers exist)
  • Surveying , Right-of-Way, Construction Staking, and Easement Services
  • Construction Phase Services: Contract Administration and Observation

New Districts - Costello assists the District’s attorney with the creation of the District and is responsible for preparing the District Creation Report, outlining all of the necessary improvements and their respective construction costs to determine the amount of bonds to be voted. These costs are then used to analyze the District tax rate. We work closely with the developer and all the District consultants to ensure a timely creation of the District and serve as the developer’s engineer on development within the District.


Mature Districts - Older, more mature districts may be either completely built out, with no developer activity whatsoever, or they may still have significant commercial/multi-family tract development ongoing. In this latter case, Costello often acts as both the District engineer and the developer’s engineer because the developer finds it both convenient and efficient to work with the District engineer. We are experienced in balancing both roles and understand the need to act on behalf of both parties in a fair and equitable manner.


Surface Water Conversion - Another critical issue for Districts, no matter what their age, is surface water conversion. We have completed numerous plant conversions for our existing districts.


Utility District Experience


Baybrook MUD 1

experience costello engineering and surveying in Texas

Created in 1984, this 862 acre district is located approximately 21 miles southeast of the City of Houston central business district within southeast Harris County and lies completely within the extraterritorial jurisdiction of the City. The District is primarily a commercial development surrounding Baybrook Mall and contains numerous retail, restaurant, and medical establishments along with one existing and one proposed multifamily project. The District is a co-participant in the City’s Southeast Water Purification Plant, owning 1.8 MGD of capacity, and a co-participant in the Gulf Coast Waste Disposal Authority’s Blackhawk Wastewater Treatment Plant, owning 1.025 MGD of capacity. Costello has served as District Engineer since 2009 and has designed improvements to numerous district facilities including the relocation of utilities to accommodate the widening of IH 45; modifications to Detention Pond No. 2, the relocation of Storm Water Pump Station No. 1, an updated Master Drainage Analysis for the District and utilities and paving for several new sections of development.

Northwest HCMUD 5

experience costello engineering and surveying in Texas

Created in 1974, this 2,400-acre district is located in northwest Houston. The district is an engineering challenge due to the fact that it was developed over many years, by multiple developers using different engineers. There are currently 14 individual subdivisions, and others on the way, stretching over 3.5 miles from north to south. Costello has served as the District engineer since 2003 and has designed multiple facilities including a wastewater plant, a new water plant, and multiple water plant improvements (well rehabilitation, ground storage tanks, hydropneumatic tanks, booster pumps, electrical and control systems, and a SCADA master base station). Additionally, Costello has designed waterlines, lift stations, force mains, utility relocations due to roadway widenings, and conversion to chloramine disinfection at all four water plants. We have also created a GIS database of all District water, sanitary sewer and storm sewer lines.

Spring West MUD

experience costello engineering and surveying in Texas

Created in 1978, this 528-acre district is located in northern Harris County. Costello has served as District Engineer since 1996 and has provided services for the following: Water Plant # 1- painting and coating of the ground storage tank and hydro-pneumatic tank, and added a booster pump; Water Plant # 2 - well design, ground storage tank, hydro-pneumatic tank, and three booster pumps; permanent wastewater treatment plant; Spring West Plaza Regional Lift Station, force main and water main; and the preparation of a feasibility study and district boundary maps required for the annexation of 136 acres.