Gaining the Corbel Edge – Mayfair Park, Lakewood, California

Nicholas Drake Blog, Stormwater

Project Lifecycle Day 4: Landing 16’ x 8’ x 10” slabs onto the jutting corbels of box culvert modular sections takes fortitude, finesse, and one of the best designs precast concrete has to offer. It’s a match made in Lakewood, California. Gaining the corbel edge means less concrete and more storage capacity for stormwater projects like the one being built in Mayfair Park. “Alternating between rows of box culvert and top/bottom slab sections reduces the amount of concrete per cubic foot required to attain a target storage capacity within a given three dimensional space,” says Vanessa Gallo, PE, Jensen Precast …

Stormwater Treatment Systems Case Study

Case Study: Stormwater Pretreatment Capture Facility in Southern California

Joe Peterson Blog, Case Studies, Stormwater Leave a Comment

Los Cerritos Channel Sub-Basin 4 Stormwater Capture Facility Long Beach Airport, California, May 2018 Dry weather runoff and first flush stormwater flows pollute a Southern California watershed. Affected cities collaborate on a comprehensive stormwater management solution provided by Jensen Stormwater Systems. The 17,771-acre Los Cerritos Channel Freshwater Watershed in Southern California showed exceedances of the total maximum daily load (TMDL) limits established by the US Environmental Protection Agency (EPA) for total suspended solids (TSS) and several heavy metals. This urbanized, commercial, and industrial watershed is generating these pollutants in both dry weather runoff and first flush stormwater flows. Seven cities in the watershed were …

APWA Golf Tournament Genoa

Jensen Precast Sponsors APWA Golf Tournament in Lake Tahoe, California

Jodi Beuder All

Golfers enjoy a day on the green with Jensen Precast at Genoa Lakes Golf Course in Genoa, Nevada, on September 28, as part of the American Public Works Association Fall Conference. The annual three day event serves as a great opportunity for Jensen Precast representatives to discuss cost-effective solutions, agency requirements and recent projects with other professionals in the public works sector.

precast submersible pump station

Water Resources: How A Submersible Pump Works

Brent Petring Pump Stations

Basic Impeller Theory The Impeller is the heart of the pump in a high flow pump station. It is the only part of the pump that adds energy to the liquid. Grossly simplifying the process, energy is added by accelerating the liquid from the smaller radius at the impeller inlet to larger radius at the impeller exit. The implications of this are that we can increase the amount of energy input into the fluid by increasing the outside diameter of the impeller or increasing the speed that it operates at. The Casing The Energy added by the spinning impeller exits as …

Case Study: Clark County Detention Center

Nicholas Drake Blog, Case Studies, Jensen Water Resource Blog, Pump Stations

Clark County Detention Center (CCDC) is located in Las Vegas, NV and serves as the city jail.  A high volume of large debris in the waste water at CCDC must be macerated before being discharged into the City sewer.  A design/build project was commissioned at CCDC to replace an existing macerator/pump system which was failing. Jensen Engineered Systems (JES), a division of Jensen Precast, assisted the plumbing sub-contractor in the design of a grinder/pump station.  The preliminary design called for a large, pour in place concrete structure.  The challenge of building the structure was that it was located between two …

Pump Stations: Control Elevations

Joe Peterson Blog, Jensen Water Resource Blog, Pump Stations

Now that we know our minimum storage volume as well as the size of our wet well, we can determine the system’s control elevations. In a duplex pumping system, there are 5 primary elevations of concern: the pump inlet, pumps “off”, lead pump “on”, lag pump “on”, and high water alarm.   The distances between these elevations are represented with the following variables: H(x) = Pump Inlet to the Pumps “Off” Elevation H(min) = Pumps “Off” to the Lead Pump “On” Elevation H(lag) = Lead Pump “On” to the Lag Pump “On” Elevation H(res) = Lag Pump “On” to the …