O’FALLON, ILL The parking lots for the Township Administration Building and Maintenance Facility were in poor condition. The scope of the project included Topographic Survey, Pavement Assessment, Pavement Design, Stormwater Design, reconfiguration of entrances to and from the facilities, ADA improvements, and general site/civil reconfiguration of existing facilities. More specifically, as part of the improvements to the site, Gonzalez proposed extending the pavement limits to the edge of pavement of a potential future connection near the salt storage dome. The entrance of the potential future connection was determined from modeling turning movements of a tractor trailer entering and exiting the site. The new garage building is a metal building approximately 42’ x 100’ with a steel frame and concrete floor. It is a pre-engineered building, it has a new panelboard fed from the existing electrical panel within the existing building on the township site. The building has underground power feed to it and fuel canopy lighting from the existing building panelboard. The new garage building includes a floor drainage system with floor drains, one per bay, connected to an oil interceptor. From topographic data gathered from the garage and maintenance yard, stormwater was directed to an enlarged detention basin on the site. Other Site/Civil improvements consisted of new storage bins, sanitary sewer improvements, new fencing, and new lighting.
PERUQUE CREEK GRAVITY SEWER
OFALLON, MO Gonzalez Cos. designed a 6,000-ft long sanitary interceptor for the City of O’Fallon, Missouri. The 30-inch gravity sewer receives pumped sewage from Public Water Supply District No. 2 of St. Charles County (PWSD2) and discharges to an existing City sewer at Peruque Creek.
The need for a new sewer was determined through Gonzalez’ planning studies and hydraulic analysis of an existing lift station and interceptor sewer. The studies considered dry and wet weather capacity, sewerage demand from anticipated land development, and projected flows from PWSD2. After evaluating alternative sewer alignments, Gonzalez prepared complete bid documents, including alternate bid items for conventional and trenchless construction methods. Working with subconsultants, Gonzalez furnished surveys, soils investigations, Section 404 and Missouri DNR permitting, and easement documents. Submittal reviews and consultation were provided during construction.
Excavation depths ranged up to 22 feet, with a varying rock profile and areas of poor surface drainage. A key issue was the maintenance of tractor-trailer access and the restoration of heavy concrete pavement in an industrial area. The alignment crosses sensitive residential yards, forested bottomland, and a rocky hillside. A vortex structure and several drop bowl inserts were provided for odor control and turbulence reduction. Other design features include streambank restoration, wetland plantings, vibration monitoring, and a 67-ft jack and bore. Construction was completed in late 2020 at an approximate cost of $2.5 million.
PRESIDENTIAL STREET IMPROVEMENTS
OFALLON, ILLINOIS Gonzalez was retained by the City of O’Fallon to provide professional services to make drainage, roadway and sewer improvements to several City streets situated just north of the City square, bounded by State Street on the south, Engle Creek on the west, Smiley Street on the east and Jackson Street on the north, locally recognized as the “Presidential Streets”.
In 2018 Gonzalez Companies completed the fourth phase of the improvements within the Presidential Streets which included more than 5,000 feet of improvements in which Gonzalez provided:
Topographic and Boundary Surveys
Drainage Design and Storm Sewer Profiles
Roadway Plan and Profiles
Sanitary Sewer Design and Permitting
Construction Details
Technical Specifications
Cost Estimate
After a successful implementation of the Phase IV improvements Gonzalez Companies was again retained by the City of O’Fallon to continue the redevelopment of the next two section of Presidential Streets, Phase V and West Presidential -Phase 1. The next two phases of the Presidential Streets consisted of 5,940 and 5,975 feet, respectively. In addition, to the roadway, drainage, and sewer design work the City of O’Fallon also requested that Gonzalez Companies expand the scope of work to include 2,775 feet of waterline improvements.
In all Gonzalez Companies has provided more than 17,000 feet of roadway and utility improvements for the City of O’Fallon at an approximate construction cost of $3.5 million with additional phases expected.
GLEN CARBON STORMWATER PROJECTS
GLEN CARBON, ILLINOIS Gonzalez prepared a stormwater master plan report for the Village of Glen Carbon to address issues with their existing stormwater system. In general, the project consisted of improving overland flow conditions, and increasing storm sewer capacities.
As part of that report, two sites were proposed for improvements in 2018, that would be included in one bid and consisted of: Site 8: Kingsley Way Runoff from a nearby agricultural field caused drainage issues along Kingsley Way. To alleviate the issue, double curb inlets were installed on both sides of the street, and the existing 12” - 15” pipe was upsized to 24” - 30” pipe. Site 25: Wolfe Creek Court A residential home on Wolfe Creek Court received damage from a creek crossing the property. A box culvert was upsized from 78” to 144” to lower the water surface of the creek in order to sufficiently protect the home.
Projects included the following tasks: Boundary survey Easement acquisition Design and bid services Technical specifications Engineer’s opinion of probable cost Permitting assistance Part-time project management during construction
STORMWATER MANAGEMENT PLAN
GLEN CARBON, ILLINOIS The Village of Glen Carbon experiences localized stormwater issues such as flooding and erosion at multiple locations throughout the Village. Gonzalez was hired to provide a stormwater management plan for the purpose of identifying current stormwater drainage problems within the Village, investigating documented problem areas, and providing recommendations to alleviate localized stormwater issues.
ORCHARDS DRAINAGE STUDY
BELLEVILLE, ILLINOIS Gonzalez was hired to perform a drainage study for the purpose of delivering a comprehensive plan providing recommendations to reduce flooding potential throughout the development.
The drainage study included an inventory of flood prone areas and identification of potential causes of flooding. Gonzalez performed GPS data
collection of critical infrastructure at approximately 80 locations in the development.
Hydrologic and hydraulic analyses were performed to calibrate known flooding to historical storm events, estimate flood potential, and develop recommendations to reduce flood potential throughout the development. Conceptual drawings, an opinion of probable cost, and a priority ranking were developed for each of the recommended improvements to allow the City of Belleville to plan for the implementation of drainage improvement projects for the benefit of impacted residents.
COLDWATER CREEK AT PADDOCK CREEK BANK STABILIZATION
ST. LOUIS, MISSOURI Gonzalez provided construction inspection services for the Paddock Creek project. This project rebuilt an embankment that had eroded over time as a result of high water events. Gonzalez staff performed daily inspections and documented construction activity in daily reports with associated photographs. In addition, We were responsible for oversight of contractor's Quality Control (as Quality Assurance), as-built record drawings, assuring conformance to plans and specifications, and project closeout.
